Merge pull request #68 from msabramo/python3

Improve Python 3 compatibility
author: Kenneth Reitz <me@kennethreitz.com> 2012-11-15 18:56:50 -0800
committer: Kenneth Reitz <me@kennethreitz.com> 2012-11-15 18:56:50 -0800
commit: 9f38efe4133f6f4c4a2e58b5867f3f7883d119c8 (patch)
tree: 9dea315df1aff6c934114b6a31a676d05f3c9dc3 /tablib
parent: 5d98239a7e988a1a16261c6cb7073d618b92cfc7 (diff)
parent: 15435047c668aa8e1fb5ffc1a8db30e5b944d5fd (diff)
download: tablib-9f38efe4133f6f4c4a2e58b5867f3f7883d119c8.tar.gz
12 files changed, 8028 insertions, 10 deletions
diff --git a/tablib/compat.py b/tablib/compat.py
index f6bcf8d..919f464 100644
--- a/tablib/compat.py
+++ b/tablib/compat.py
@@ -23,6 +23,8 @@ except ImportError:
 if is_py3:
     from io import BytesIO
     import tablib.packages.xlwt3 as xlwt
+    import tablib.packages.xlrd3 as xlrd
+    from tablib.packages.xlrd3.biffh import XLRDError
     from tablib.packages import markup3 as markup
     from tablib.packages import openpyxl3 as openpyxl
     from tablib.packages.odf3 import opendocument, style, text, table
@@ -40,6 +42,7 @@ else:
     from cStringIO import StringIO
     import tablib.packages.xlwt as xlwt
     import tablib.packages.xlrd as xlrd
+    from tablib.packages.xlrd.biffh import XLRDError
     from tablib.packages import markup
     from itertools import ifilter
     from tablib.packages import openpyxl
@@ -47,4 +50,4 @@ else:
 
     from tablib.packages import unicodecsv as csv
 
-    unicode = unicode
-\ No newline at end of file
+    unicode = unicode
diff --git a/tablib/core.py b/tablib/core.py
index 1fdc77c..cb192ae 100644
--- a/tablib/core.py
+++ b/tablib/core.py
@@ -226,19 +226,21 @@ class Dataset(object):
     def __unicode__(self):
         result = [self.__headers]
 
-        result.extend(map(unicode, row) for row in self._data)
+        result.extend(list(map(unicode, row)) for row in self._data)
 
         # here, we calculate max width for each column
-        lens = (map(len, row) for row in result)
-        field_lens = map(max, zip(*lens))
+        lens = (list(map(len, row)) for row in result)
+        field_lens = list(map(max, zip(*lens)))
 
         # delimiter between header and data
-        result.insert(1, [u'-' * length for length in field_lens])
+        result.insert(1, ['-' * length for length in field_lens])
 
-        format_string = u'|'.join(u'{%s:%s}' % item for item in enumerate(field_lens))
+        format_string = '|'.join('{%s:%s}' % item for item in enumerate(field_lens))
 
-        return u'\n'.join(format_string.format(*row) for row in result)
+        return '\n'.join(format_string.format(*row) for row in result)
 
+    def __str__(self):
+        return self.__unicode__()
 
 
     # ---------
diff --git a/tablib/formats/_xls.py b/tablib/formats/_xls.py
index 9ca0eb3..eab0aa8 100644
--- a/tablib/formats/_xls.py
+++ b/tablib/formats/_xls.py
@@ -5,9 +5,7 @@
 
 import sys
 
-from tablib.compat import BytesIO, xlwt
-from tablib.packages import xlrd
-from tablib.packages.xlrd.biffh import XLRDError
+from tablib.compat import BytesIO, xlwt, xlrd, XLRDError
 import tablib
 
 title = 'xls'
diff --git a/tablib/packages/xlrd3/__init__.py b/tablib/packages/xlrd3/__init__.py
new file mode 100644
index 0000000..98f322b
--- /dev/null
+++ b/tablib/packages/xlrd3/__init__.py
@@ -0,0 +1,1642 @@
+# Copyright © 2005-2009 Stephen John Machin, Lingfo Pty Ltd
+# This module is part of the xlrd3 package, which is released under a
+# BSD-style licence.
+#
+# xlrd3, the Python 3 port of xlrd v0.7.1
+#
+# A Python module for extracting data from MS Excel spreadsheet files.
+#
+# General information
+#
+# Acknowledgements
+#
+# Development of this module would not have been possible without the document
+# "OpenOffice.org's Documentation of the Microsoft Excel File Format"
+# ("OOo docs" for short).
+# The latest version is available from OpenOffice.org in
+# http://sc.openoffice.org/excelfileformat.pdf PDF format
+# and
+# http://sc.openoffice.org/excelfileformat.odt ODT format.
+# Small portions of the OOo docs are reproduced in this
+# document. A study of the OOo docs is recommended for those who wish a
+# deeper understanding of the Excel file layout than the xlrd docs can provide.
+#
+# Provision of formatting information in version 0.6.1 was funded by
+# http://www.simplistix.co.uk Simplistix Ltd.
+#
+# Unicode
+#
+# This module presents all text strings as Python unicode objects.
+# From Excel 97 onwards, text in Excel spreadsheets has been stored as Unicode.
+# Older files (Excel 95 and earlier) don't keep strings in Unicode;
+# a CODEPAGE record provides a codepage number (for example, 1252) which is
+# used by xlrd to derive the encoding (for same example: "cp1252") which is
+# used to translate to Unicode.
+#
+# If the CODEPAGE record is missing (possible if the file was created
+# by third-party software), xlrd will assume that the encoding is ascii, and keep going.
+# If the actual encoding is not ascii, a UnicodeDecodeError exception will be raised and
+# you will need to determine the encoding yourself, and tell xlrd::
+#
+#     book = xlrd.open_workbook(..., encoding_override="cp1252")
+#
+# If the CODEPAGE record exists but is wrong (for example, the codepage
+# number is 1251, but the strings are actually encoded in koi8_r),
+# it can be overridden using the same mechanism.
+# The supplied runxlrd.py has a corresponding command-line argument, which
+# may be used for experimentation::
+#
+#     runxlrd.py -e koi8_r 3rows myfile.xls
+#
+# The first place to look for an encoding ("codec name") is
+# http://docs.python.org/lib/standard-encodings.html
+# the Python documentation.
+#
+# Dates in Excel spreadsheets
+#
+# In reality, there are no such things. What you have are floating point
+# numbers and pious hope.
+# There are several problems with Excel dates:
+#
+# (1) Dates are not stored as a separate data type; they are stored as
+# floating point numbers and you have to rely on
+# (a) the "number format" applied to them in Excel and/or
+# (b) knowing which cells are supposed to have dates in them.
+# This module helps with (a) by inspecting the
+# format that has been applied to each number cell;
+# if it appears to be a date format, the cell
+# is classified as a date rather than a number. Feedback on this feature,
+# especially from non-English-speaking locales, would be appreciated.
+#
+# (2) Excel for Windows stores dates by default as the number of
+# days (or fraction thereof) since 1899-12-31T00:00:00. Excel for
+# Macintosh uses a default start date of 1904-01-01T00:00:00. The date
+# system can be changed in Excel on a per-workbook basis (for example:
+# Tools -> Options -> Calculation, tick the "1904 date system" box).
+# This is of course a bad idea if there are already dates in the
+# workbook. There is no good reason to change it even if there are no
+# dates in the workbook. Which date system is in use is recorded in the
+# workbook. A workbook transported from Windows to Macintosh (or vice
+# versa) will work correctly with the host Excel. When using this
+# module's xldate_as_tuple function to convert numbers from a workbook,
+# you must use the datemode attribute of the Book object. If you guess,
+# or make a judgement depending on where you believe the workbook was
+# created, you run the risk of being 1462 days out of kilter.
+#
+# Reference:
+# http://support.microsoft.com/default.aspx?scid=KB;EN-US;q180162
+#
+# (3) The Excel implementation of the Windows-default 1900-based date system works on the
+# incorrect premise that 1900 was a leap year. It interprets the number 60 as meaning 1900-02-29,
+# which is not a valid date. Consequently any number less than 61 is ambiguous. Example: is 59 the
+# result of 1900-02-28 entered directly, or is it 1900-03-01 minus 2 days? The OpenOffice.org Calc
+# program "corrects" the Microsoft problem; entering 1900-02-27 causes the number 59 to be stored.
+# Save as an XLS file, then open the file with Excel -- you'll see 1900-02-28 displayed.
+#
+# Reference: http://support.microsoft.com/default.aspx?scid=kb;en-us;214326
+#
+# (4) The Macintosh-default 1904-based date system counts 1904-01-02 as day 1 and 1904-01-01 as day zero.
+# Thus any number such that (0.0 <= number < 1.0) is ambiguous. Is 0.625 a time of day (15:00:00),
+# independent of the calendar,
+# or should it be interpreted as an instant on a particular day (1904-01-01T15:00:00)?
+# The xldate_* functions in this module
+# take the view that such a number is a calendar-independent time of day (like Python's datetime.time type) for both
+# date systems. This is consistent with more recent Microsoft documentation
+# (for example, the help file for Excel 2002 which says that the first day
+# in the 1904 date system is 1904-01-02).
+#
+# (5) Usage of the Excel DATE() function may leave strange dates in a spreadsheet. Quoting the help file,
+# in respect of the 1900 date system: "If year is between 0 (zero) and 1899 (inclusive),
+# Excel adds that value to 1900 to calculate the year. For example, DATE(108,1,2) returns January 2, 2008 (1900+108)."
+# This gimmick, semi-defensible only for arguments up to 99 and only in the pre-Y2K-awareness era,
+# means that DATE(1899, 12, 31) is interpreted as 3799-12-31.
+#
+# For further information, please refer to the documentation for the xldate_* functions.
+#
+#  Named references, constants, formulas, and macros
+#
+# A name is used to refer to a cell, a group of cells, a constant
+# value, a formula, or a macro. Usually the scope of a name is global
+# across the whole workbook. However it can be local to a worksheet.
+# For example, if the sales figures are in different cells in
+# different sheets, the user may define the name "Sales" in each
+# sheet. There are built-in names, like "Print_Area" and
+# "Print_Titles"; these two are naturally local to a sheet.
+#
+# To inspect the names with a user interface like MS Excel, OOo Calc,
+# or Gnumeric, click on Insert/Names/Define. This will show the global
+# names, plus those local to the currently selected sheet.
+#
+# A Book object provides two dictionaries (name_map and
+# name_and_scope_map) and a list (name_obj_list) which allow various
+# ways of accessing the Name objects. There is one Name object for
+# each NAME record found in the workbook. Name objects have many
+# attributes, several of which are relevant only when obj.macro is 1.
+#
+# In the examples directory you will find namesdemo.xls which
+# showcases the many different ways that names can be used, and
+# xlrdnamesAPIdemo.py which offers 3 different queries for inspecting
+# the names in your files, and shows how to extract whatever a name is
+# referring to. There is currently one "convenience method",
+# Name.cell(), which extracts the value in the case where the name
+# refers to a single cell. More convenience methods are planned. The
+# source code for Name.cell (in __init__.py) is an extra source of
+# information on how the Name attributes hang together.
+#
+# Name information is **not** extracted from files older than
+# Excel 5.0 (Book.biff_version < 50)
+#
+# Formatting
+#
+# Introduction
+#
+# This collection of features, new in xlrd version 0.6.1, is intended
+# to provide the information needed to (1) display/render spreadsheet contents
+# (say) on a screen or in a PDF file, and (2) copy spreadsheet data to another
+# file without losing the ability to display/render it.
+#
+# The Palette; Colour Indexes
+#
+# A colour is represented in Excel as a (red, green, blue) ("RGB") tuple
+# with each component in range(256). However it is not possible to access an
+# unlimited number of colours; each spreadsheet is limited to a palette of 64 different
+# colours (24 in Excel 3.0 and 4.0, 8 in Excel 2.0). Colours are referenced by an index
+# ("colour index") into this palette.
+#
+# Colour indexes 0 to 7 represent 8 fixed built-in colours: black, white, red, green, blue,
+# yellow, magenta, and cyan.
+#
+# The remaining colours in the palette (8 to 63 in Excel 5.0 and later)
+# can be changed by the user. In the Excel 2003 UI, Tools/Options/Color presents a palette
+# of 7 rows of 8 colours. The last two rows are reserved for use in charts.
+# The correspondence between this grid and the assigned
+# colour indexes is NOT left-to-right top-to-bottom.
+# Indexes 8 to 15 correspond to changeable
+# parallels of the 8 fixed colours -- for example, index 7 is forever cyan;
+# index 15 starts off being cyan but can be changed by the user.
+#
+# The default colour for each index depends on the file version; tables of the defaults
+# are available in the source code. If the user changes one or more colours,
+# a PALETTE record appears in the XLS file -- it gives the RGB values for *all* changeable
+# indexes.
+# Note that colours can be used in "number formats": "[CYAN]...." and "[COLOR8]...." refer
+# to colour index 7; "[COLOR16]...." will produce cyan
+# unless the user changes colour index 15 to something else.
+#
+# In addition, there are several "magic" colour indexes used by Excel:
+# 0x18 (BIFF3-BIFF4), 0x40 (BIFF5-BIFF8): System window text colour for border lines
+# (used in XF, CF, and WINDOW2 records)
+# 0x19 (BIFF3-BIFF4), 0x41 (BIFF5-BIFF8): System window background colour for pattern background
+# (used in XF and CF records )
+# 0x43: System face colour (dialogue background colour)
+# 0x4D: System window text colour for chart border lines
+# 0x4E: System window background colour for chart areas
+# 0x4F: Automatic colour for chart border lines (seems to be always Black)
+# 0x50: System ToolTip background colour (used in note objects)
+# 0x51: System ToolTip text colour (used in note objects)
+# 0x7FFF: System window text colour for fonts (used in FONT and CF records)
+# Note 0x7FFF appears to be the *default* colour index. It appears quite often in FONT
+# records.
+#
+# Default Formatting
+#
+# Default formatting is applied to all empty cells (those not described by a cell record).
+# Firstly row default information (ROW record, Rowinfo class) is used if available.
+# Failing that, column default information (COLINFO record, Colinfo class) is used if available.
+# As a last resort the worksheet/workbook default cell format will be used; this
+# should always be present in an Excel file,
+# described by the XF record with the fixed index 15 (0-based). By default, it uses the
+# worksheet/workbook default cell style, described by the very first XF record (index 0).
+#
+#  Formatting features not included in xlrd version 0.6.1
+#
+#  - Rich text i.e. strings containing partial bold, italic
+#    and underlined text, change of font inside a string, etc.
+#    See OOo docs s3.4 and s3.2
+#  - Asian phonetic text (known as "ruby"), used for Japanese furigana. See OOo docs
+#       s3.4.2 (p15)
+#  - Conditional formatting. See OOo docs
+#    s5.12, s6.21 (CONDFMT record), s6.16 (CF record)
+#  - Miscellaneous sheet-level and book-level items e.g. printing layout, screen panes.
+#  - Modern Excel file versions don't keep most of the built-in
+#    "number formats" in the file; Excel loads formats according to the
+#    user's locale. Currently xlrd's emulation of this is limited to
+#    a hard-wired table that applies to the US English locale. This may mean
+#    that currency symbols, date order, thousands separator, decimals separator, etc
+#    are inappropriate. Note that this does not affect users who are copying XLS
+#    files, only those who are visually rendering cells.
+#
+# Loading worksheets on demand
+#
+# This feature, new in version 0.7.1, is governed by the on_demand argument
+# to the open_workbook() function and allows saving memory and time by loading
+# only those sheets that the caller is interested in, and releasing sheets
+# when no longer required.
+#
+# on_demand=False (default): No change. open_workbook() loads global data
+# and all sheets, releases resources no longer required (principally the
+# str or mmap object containing the Workbook stream), and returns.
+#
+# on_demand=True and BIFF version < 5.0: A warning message is emitted,
+# on_demand is recorded as False, and the old process is followed.
+#
+# on_demand=True and BIFF version >= 5.0: open_workbook() loads global
+# data and returns without releasing resources. At this stage, the only
+# information available about sheets is Book.nsheets and Book.sheet_names().
+#
+# Book.sheet_by_name() and Book.sheet_by_index() will load the requested
+# sheet if it is not already loaded.
+#
+# Book.sheets() will load all/any unloaded sheets.
+#
+# The caller may save memory by calling
+# Book.unload_sheet(sheet_name_or_index) when finished with the sheet.
+# This applies irrespective of the state of on_demand.
+#
+# The caller may re-load an unloaded sheet by calling Book.sheet_by_xxxx()
+#  -- except if those required resources have been released (which will
+# have happened automatically when on_demand is false). This is the only
+# case where an exception will be raised.
+#
+# The caller may query the state of a sheet:
+# Book.sheet_loaded(sheet_name_or_index) -> a bool
+#
+# 2010-12-03 mozman start xlrd3, for changes see NEWS.txt
+#
+# 2009-04-27 SJM Integrated on_demand patch by Armando Serrano Lombillo
+# 2008-11-23 SJM Support dumping FILEPASS and EXTERNNAME records; extra info from SUPBOOK records
+# 2008-11-23 SJM colname utility function now supports more than 256 columns
+# 2008-04-24 SJM Recovery code for file with out-of-order/missing/wrong CODEPAGE record needed to be called for EXTERNSHEET/BOUNDSHEET/NAME/SHEETHDR records.
+# 2008-02-08 SJM Preparation for Excel 2.0 support
+# 2008-02-03 SJM Minor tweaks for IronPython support
+# 2008-02-02 SJM Previous change stopped dump() and count_records() ... fixed
+# 2007-12-25 SJM Decouple Book initialisation & loading -- to allow for multiple loaders.
+# 2007-12-20 SJM Better error message for unsupported file format.
+# 2007-12-04 SJM Added support for Excel 2.x (BIFF2) files.
+# 2007-11-20 SJM Wasn't handling EXTERNSHEET record that needed CONTINUE record(s)
+# 2007-07-07 SJM Version changed to 0.7.0 (alpha 1)
+# 2007-07-07 SJM Logfile arg wasn't being passed from open_workbook to compdoc.CompDoc
+# 2007-05-21 SJM If no CODEPAGE record in pre-8.0 file, assume ascii and keep going.
+# 2007-04-22 SJM Removed antique undocumented Book.get_name_dict method.
+
+import sys
+import time
+from struct import unpack
+import mmap
+
+from . import sheet
+from . import compdoc
+from . import formatting
+from .biffh import *
+from .xldate import xldate_as_tuple, XLDateError
+from .formula import *
+from .xfcell import XFCell
+
+empty_cell = sheet.empty_cell # for exposure to the world ...
+
+DEBUG = False
+USE_FANCY_CD = 1
+
+MY_EOF = 0xF00BAAA # not a 16-bit number
+
+SUPBOOK_UNK = 0
+SUPBOOK_INTERNAL = 1
+SUPBOOK_EXTERNAL = 2
+SUPBOOK_ADDIN = 3
+SUPBOOK_DDEOLE = 4
+
+SUPPORTED_VERSIONS = (80, 70, 50, 45, 40, 30, 21, 20)
+
+code_from_builtin_name = {
+    "Consolidate_Area": "\x00",
+    "Auto_Open":        "\x01",
+    "Auto_Close":       "\x02",
+    "Extract":          "\x03",
+    "Database":         "\x04",
+    "Criteria":         "\x05",
+    "Print_Area":       "\x06",
+    "Print_Titles":     "\x07",
+    "Recorder":         "\x08",
+    "Data_Form":        "\x09",
+    "Auto_Activate":    "\x0A",
+    "Auto_Deactivate":  "\x0B",
+    "Sheet_Title":      "\x0C",
+    "_FilterDatabase":  "\x0D",
+    }
+
+builtin_name_from_code = {}
+for _bin, _bic in code_from_builtin_name.items():
+    builtin_name_from_code[_bic] = _bin
+
+#
+# Open a spreadsheet file for data extraction.
+#
+# @param filename The path to the spreadsheet file to be opened.
+#
+# @param logfile An open file to which messages and diagnostics are written.
+#
+# @param verbosity Increases the volume of trace material written to the logfile.
+#
+# @param pickleable Default is true. In Python 2.4 or earlier, setting to false
+# will cause use of array.array objects which save some memory but can't be pickled.
+# In Python 2.5, array.arrays are used unconditionally. Note: if you have large files that
+# you need to read multiple times, it can be much faster to cPickle.dump() the xlrd.Book object
+# once, and use cPickle.load() multiple times.
+# @param use_mmap Whether to use the mmap module is determined heuristically.
+# Use this arg to override the result. Current heuristic: mmap is used if it exists.
+#
+# @param file_contents ... as a string or an mmap.mmap object or some other behave-alike object.
+# If file_contents is supplied, filename will not be used, except (possibly) in messages.
+#
+# @param encoding_override Used to overcome missing or bad codepage information
+# in older-version files. Refer to discussion in the <b>Unicode</b> section above.
+# - New in version 0.6.0
+#
+# @param formatting_info Governs provision of a reference to an XF (eXtended Format) object
+# for each cell in the worksheet.
+#  Default is <i>False</i>. This is backwards compatible and saves memory.
+# "Blank" cells (those with their own formatting information but no data) are treated as empty
+# (by ignoring the file's BLANK and MULBLANK records).
+# It cuts off any bottom "margin" of rows of empty (and blank) cells and
+# any right "margin" of columns of empty (and blank) cells.
+# Only cell_value and cell_type are available.
+#  `True` provides all cells, including empty and blank cells.
+# XF information is available for each cell.
+# - New in version 0.6.1
+#
+# @param on_demand Governs whether sheets are all loaded initially or when demanded
+# by the caller. Please refer back to the section "Loading worksheets on demand" for details.
+# - New in version 0.7.1
+#
+# @return An instance of the Book class.
+
+def open_workbook(filename=None,
+                  logfile=sys.stdout,
+                  verbosity=0,
+                  pickleable=True,
+                  use_mmap=True,
+                  file_contents=None,
+                  encoding_override=None,
+                  formatting_info=False,
+                  on_demand=False):
+    t0 = time.clock()
+    workbook = Book()
+    workbook.biff2_8_load(filename=filename,
+                          file_contents=file_contents,
+                          logfile=logfile,
+                          verbosity=verbosity,
+                          pickleable=pickleable,
+                          use_mmap=use_mmap,
+                          encoding_override=encoding_override,
+                          formatting_info=formatting_info,
+                          on_demand=on_demand)
+    t1 = time.clock()
+    workbook.load_time_stage_1 = t1 - t0
+    biff_version = workbook.getbof(XL_WORKBOOK_GLOBALS)
+    if not biff_version:
+        raise XLRDError("Can't determine file's BIFF version")
+
+    if biff_version not in SUPPORTED_VERSIONS:
+        raise XLRDError( "BIFF version %s is not supported" % \
+                         biff_text_from_num[biff_version])
+
+    workbook.biff_version = biff_version
+
+    if biff_version <= 40:
+        # no workbook globals, only 1 worksheet
+        if on_demand:
+            fprintf(workbook.logfile,
+                    "*** WARNING: on_demand is not supported for this Excel version.\n" \
+                    "*** Setting on_demand to False.\n")
+            workbook.on_demand = on_demand = False
+        workbook.fake_globals_get_sheet()
+    elif biff_version == 45:
+        # worksheet(s) embedded in global stream
+        workbook.parse_globals()
+        if on_demand:
+            fprintf(workbook.logfile,
+                    "*** WARNING: on_demand is not supported for this Excel version.\n" \
+                    "*** Setting on_demand to False.\n")
+            workbook.on_demand = on_demand = False
+    else:
+        workbook.parse_globals()
+        workbook._sheet_list = [None for sh in workbook._sheet_names]
+        if not on_demand:
+            workbook.get_sheets()
+
+    workbook.nsheets = len(workbook._sheet_list)
+    if biff_version == 45 and workbook.nsheets > 1:
+        fprintf(workbook.logfile,
+            "*** WARNING: Excel 4.0 workbook (.XLW) file contains %d worksheets.\n" \
+            "*** Book-level data will be that of the last worksheet.\n",
+            workbook.nsheets)
+
+    if not on_demand:
+        workbook.release_resources()
+    t2 = time.clock()
+    workbook.load_time_stage_2 = t2 - t1
+    return workbook
+
+# For debugging: dump the file's BIFF records in char & hex.
+# @param filename The path to the file to be dumped.
+# @param outfile An open file, to which the dump is written.
+# @param unnumbered If true, omit offsets (for meaningful diffs).
+
+def dump(filename, outfile=sys.stdout, unnumbered=False):
+    workbook = Book()
+    workbook.biff2_8_load(filename=filename, logfile=outfile, )
+    biff_dump(workbook.mem, workbook.base, workbook.stream_len, 0, outfile, unnumbered)
+
+# For debugging and analysis: summarise the file's BIFF records.
+# I.e. produce a sorted file of (record_name, count).
+# @param filename The path to the file to be summarised.
+# @param outfile An open file, to which the summary is written.
+
+def count_records(filename, outfile=sys.stdout):
+    workbook = Book()
+    workbook.biff2_8_load(filename=filename, logfile=outfile, )
+    biff_count_records(workbook.mem, workbook.base, workbook.stream_len, outfile)
+
+# Information relating to a named reference, formula, macro, etc.
+#  - New in version 0.6.0
+#  - Name information is **not** extracted from files older than
+#    Excel 5.0 (Book.biff_version < 50)
+
+class Name(BaseObject):
+
+    _repr_these = ['stack']
+    book = None # parent
+
+    # 0 = Visible; 1 = Hidden
+    hidden = 0
+
+    # 0 = Command macro; 1 = Function macro. Relevant only if macro == 1
+    func = 0
+
+    # 0 = Sheet macro; 1 = VisualBasic macro. Relevant only if macro == 1
+    vbasic = 0
+
+    # 0 = Standard name; 1 = Macro name
+    macro = 0
+
+    # 0 = Simple formula; 1 = Complex formula (array formula or user defined)
+    # ´No examples have been sighted.´
+    complex = 0
+
+    # 0 = User-defined name; 1 = Built-in name
+    # (common examples: Print_Area, Print_Titles; see OOo docs for full list)
+    builtin = 0
+
+    # Function group. Relevant only if macro == 1; see OOo docs for values.
+    funcgroup = 0
+
+    # 0 = Formula definition; 1 = Binary data  ´No examples have been sighted.´
+    binary = 0
+
+    # The index of this object in book.name_obj_list
+    name_index = 0
+
+    # A Unicode string. If builtin, decoded as per OOo docs.
+    name = ""
+
+    # An 8-bit string.
+    raw_formula = ""
+
+    # -1: The name is global (visible in all calculation sheets).
+    # -2: The name belongs to a macro sheet or VBA sheet.
+    # -3: The name is invalid.
+    # 0 <= scope < book.nsheets: The name is local to the sheet whose index is scope.
+    scope = -1
+
+    # The result of evaluating the formula, if any.
+    # If no formula, or evaluation of the formula encountered problems,
+    # the result is None. Otherwise the result is a single instance of the
+    # Operand class.
+    result = None
+
+    # This is a convenience method for the frequent use case where the name
+    # refers to a single cell.
+    # @return An instance of the Cell class.
+    # @throws XLRDError The name is not a constant absolute reference
+    # to a single cell.
+    def cell(self):
+        res = self.result
+        if res:
+            # result should be an instance of the Operand class
+            kind = res.kind
+            value = res.value
+            if kind == oREF and len(value) == 1:
+                ref3d = value[0]
+                if (0 <= ref3d.shtxlo == ref3d.shtxhi - 1
+                and      ref3d.rowxlo == ref3d.rowxhi - 1
+                and      ref3d.colxlo == ref3d.colxhi - 1):
+                    sh = self.book.sheet_by_index(ref3d.shtxlo)
+                    return sh.cell(ref3d.rowxlo, ref3d.colxlo)
+        self.dump(self.book.logfile,
+            header="=== Dump of Name object ===",
+            footer="======= End of dump =======")
+        raise XLRDError("Not a constant absolute reference to a single cell")
+
+    # This is a convenience method for the use case where the name
+    # refers to one rectangular area in one worksheet.
+    # @param clipped If true (the default), the returned rectangle is clipped
+    # to fit in (0, sheet.nrows, 0, sheet.ncols) -- it is guaranteed that
+    # 0 <= rowxlo <= rowxhi <= sheet.nrows and that the number of usable rows
+    # in the area (which may be zero) is rowxhi - rowxlo; likewise for columns.
+    # @return a tuple (sheet_object, rowxlo, rowxhi, colxlo, colxhi).
+    # @throws XLRDError The name is not a constant absolute reference
+    # to a single area in a single sheet.
+    def area2d(self, clipped=True):
+        res = self.result
+        if res:
+            # result should be an instance of the Operand class
+            kind = res.kind
+            value = res.value
+            if kind == oREF and len(value) == 1: # only 1 reference
+                ref3d = value[0]
+                if 0 <= ref3d.shtxlo == ref3d.shtxhi - 1: # only 1 usable sheet
+                    sh = self.book.sheet_by_index(ref3d.shtxlo)
+                    if not clipped:
+                        return sh, ref3d.rowxlo, ref3d.rowxhi, ref3d.colxlo, ref3d.colxhi
+                    rowxlo = min(ref3d.rowxlo, sh.nrows)
+                    rowxhi = max(rowxlo, min(ref3d.rowxhi, sh.nrows))
+                    colxlo = min(ref3d.colxlo, sh.ncols)
+                    colxhi = max(colxlo, min(ref3d.colxhi, sh.ncols))
+                    assert 0 <= rowxlo <= rowxhi <= sh.nrows
+                    assert 0 <= colxlo <= colxhi <= sh.ncols
+                    return sh, rowxlo, rowxhi, colxlo, colxhi
+        self.dump(self.book.logfile,
+            header="=== Dump of Name object ===",
+            footer="======= End of dump =======",
+            )
+        raise XLRDError("Not a constant absolute reference to a single area in a single sheet")
+
+# Contents of a "workbook".
+# WARNING: You don't call this class yourself. You use the Book object that
+# was returned when you called xlrd.open_workbook("myfile.xls").
+
+class Book(BaseObject):
+
+    # The number of worksheets present in the workbook file.
+    # This information is available even when no sheets have yet been loaded.
+    nsheets = 0
+
+    # Which date system was in force when this file was last saved.
+    #    0 => 1900 system (the Excel for Windows default).
+    #    1 => 1904 system (the Excel for Macintosh default).
+    datemode = 0 # In case it's not specified in the file.
+
+    # Version of BIFF (Binary Interchange File Format) used to create the file.
+    # Latest is 8.0 (represented here as 80), introduced with Excel 97.
+    # Earliest supported by this module: 2.0 (represented as 20).
+    biff_version = 0
+
+    # List containing a Name object for each NAME record in the workbook.
+    # - New in version 0.6.0
+    name_obj_list = []
+
+    # An integer denoting the character set used for strings in this file.
+    # For BIFF 8 and later, this will be 1200, meaning Unicode; more precisely, UTF_16_LE.
+    # For earlier versions, this is used to derive the appropriate Python encoding
+    # to be used to convert to Unicode.
+    # Examples: 1252 -> 'cp1252', 10000 -> 'mac_roman'
+    codepage = None
+
+    # The encoding that was derived from the codepage.
+    encoding = None
+
+    # A tuple containing the (telephone system) country code for:
+    #    [0]: the user-interface setting when the file was created.
+    #    [1]: the regional settings.
+    # Example: (1, 61) meaning (USA, Australia).
+    # This information may give a clue to the correct encoding for an unknown codepage.
+    # For a long list of observed values, refer to the OpenOffice.org documentation for
+    # the COUNTRY record.
+    countries = (0, 0)
+
+    # What (if anything) is recorded as the name of the last user to save the file.
+    user_name = ''
+
+    # A list of Font class instances, each corresponding to a FONT record.
+    # - New in version 0.6.1
+    font_list = []
+
+    # A list of XF class instances, each corresponding to an XF record.
+    # - New in version 0.6.1
+    xf_list = []
+
+    # A list of Format objects, each corresponding to a FORMAT record, in
+    # the order that they appear in the input file.
+    # It does <i>not</i> contain builtin formats.
+    # If you are creating an output file using (for example) pyExcelerator,
+    # use this list.
+    # The collection to be used for all visual rendering purposes is format_map.
+    # - New in version 0.6.1
+    format_list = []
+
+    # The mapping from XF.format_key to Format object.
+    # - New in version 0.6.1
+    format_map = {}
+
+    # This provides access via name to the extended format information for
+    # both built-in styles and user-defined styles.
+    # It maps <i>name</i> to (<i>built_in</i>, <i>xf_index</i>), where:
+    # <i>name</i> is either the name of a user-defined style,
+    # or the name of one of the built-in styles. Known built-in names are
+    # Normal, RowLevel_1 to RowLevel_7,
+    # ColLevel_1 to ColLevel_7, Comma, Currency, Percent, "Comma [0]",
+    # "Currency [0]", Hyperlink, and "Followed Hyperlink".
+    # ´built_in´ 1 = built-in style, 0 = user-defined
+    # ´xf_index´ is an index into Book.xf_list.
+    # References: OOo docs s6.99 (STYLE record); Excel UI Format/Style
+    # - New in version 0.6.1
+    style_name_map = {}
+
+    # This provides definitions for colour indexes. Please refer to the
+    # above section "The Palette; Colour Indexes" for an explanation
+    # of how colours are represented in Excel.
+    # Colour indexes into the palette map into (red, green, blue) tuples.
+    # "Magic" indexes e.g. 0x7FFF map to None.
+    # ´colour_map´ is what you need if you want to render cells on screen or in a PDF
+    # file. If you are writing an output XLS file, use <i>palette_record</i>.
+    # - New in version 0.6.1. Extracted only if open_workbook(..., formatting_info=True)
+    colour_map = {}
+
+    # If the user has changed any of the colours in the standard palette, the XLS
+    # file will contain a PALETTE record with 56 (16 for Excel 4.0 and earlier)
+    # RGB values in it, and this list will be e.g. [(r0, b0, g0), ..., (r55, b55, g55)].
+    # Otherwise this list will be empty. This is what you need if you are
+    # writing an output XLS file. If you want to render cells on screen or in a PDF
+    # file, use colour_map.
+    # - New in version 0.6.1. Extracted only if open_workbook(..., formatting_info=True)
+    palette_record = []
+
+    # Time in seconds to extract the XLS image as a contiguous string (or mmap equivalent).
+    load_time_stage_1 = -1.0
+
+    # Time in seconds to parse the data from the contiguous string (or mmap equivalent).
+    load_time_stage_2 = -1.0
+
+    # @return A list of all sheets in the book.
+    # All sheets not already loaded will be loaded.
+    def sheets(self):
+        for sheetx in range(self.nsheets):
+            if not self._sheet_list[sheetx]:
+                self.get_sheet(sheetx)
+        return self._sheet_list[:]
+
+    # @param sheetx Sheet index in range(nsheets)
+    # @return An object of the Sheet class
+    def sheet_by_index(self, sheetx):
+        return self._sheet_list[sheetx] or self.get_sheet(sheetx)
+
+    # @param sheet_name Name of sheet required
+    # @return An object of the Sheet class
+    def sheet_by_name(self, sheet_name):
+        try:
+            sheetx = self._sheet_names.index(sheet_name)
+        except ValueError:
+            raise XLRDError('No sheet named <%r>' % sheet_name)
+        return self.sheet_by_index(sheetx)
+
+    # @return A list of the names of all the worksheets in the workbook file.
+    # This information is available even when no sheets have yet been loaded.
+    def sheet_names(self):
+        return self._sheet_names[:]
+
+    # @param sheet_name_or_index Name or index of sheet enquired upon
+    # @return true if sheet is loaded, false otherwise
+    #   -- New in version 0.7.1
+    def sheet_loaded(self, sheet_name_or_index):
+        # using type(1) because int won't work with Python 2.1
+        if isinstance(sheet_name_or_index, type(1)):
+            sheetx = sheet_name_or_index
+        else:
+            try:
+                sheetx = self._sheet_names.index(sheet_name_or_index)
+            except ValueError:
+                raise XLRDError('No sheet named <%r>' % sheet_name_or_index)
+        return self._sheet_list[sheetx] and True or False # Python 2.1 again
+
+    # @param sheet_name_or_index Name or index of sheet to be unloaded.
+    # - New in version 0.7.1
+    def unload_sheet(self, sheet_name_or_index):
+        # using type(1) because int won't work with Python 2.1
+        if isinstance(sheet_name_or_index, type(1)):
+            sheetx = sheet_name_or_index
+        else:
+            try:
+                sheetx = self._sheet_names.index(sheet_name_or_index)
+            except ValueError:
+                raise XLRDError('No sheet named <%r>' % sheet_name_or_index)
+        self._sheet_list[sheetx] = None
+
+    # A mapping from (lower_case_name, scope) to a single Name object.
+    # - New in version 0.6.0
+    name_and_scope_map = {}
+
+    # A mapping from lower_case_name to a list of Name objects. The list is
+    # sorted in scope order. Typically there will be one item (of global scope)
+    # in the list.
+    # - New in version 0.6.0
+    name_map = {}
+
+    def __init__(self):
+        self._sheet_list = []
+        self._sheet_names = []
+        self._sheet_visibility = [] # from BOUNDSHEET record
+        self.nsheets = 0
+        self._sh_abs_posn = [] # sheet's absolute position in the stream
+        self._sharedstrings = []
+        self.raw_user_name = False
+        self._sheethdr_count = 0 # BIFF 4W only
+        self.builtinfmtcount = -1 # unknown as yet. BIFF 3, 4S, 4W
+        self.initialise_format_info()
+        self._all_sheets_count = 0 # includes macro & VBA sheets
+        self._supbook_count = 0
+        self._supbook_locals_inx = None
+        self._supbook_addins_inx = None
+
+        # maps an all_sheets index to a calc-sheets index (or -1)
+        self._all_sheets_map = []
+        self._externsheet_info = []
+        self._externsheet_type_b57 = []
+        self._extnsht_name_from_num = {}
+        self._sheet_num_from_name = {}
+        self._extnsht_count = 0
+        self._supbook_types = []
+        self._resources_released = 0
+        self.addin_func_names = []
+        self.name_obj_list = []
+        self.colour_map = {}
+        self.palette_record = []
+        self.xf_list = []
+        self.style_name_map = {}
+
+    def biff2_8_load(self, filename=None,
+                     file_contents=None,
+                     logfile=sys.stdout,
+                     verbosity=0,
+                     pickleable=True,
+                     use_mmap=True,
+                     encoding_override=None,
+                     formatting_info=False,
+                     on_demand=False):
+
+        self.logfile = logfile
+        self.verbosity = verbosity
+        self.pickleable = pickleable
+        self.use_mmap = use_mmap
+        self.encoding_override = encoding_override
+        self.formatting_info = formatting_info
+        self.on_demand = on_demand
+
+        need_close_filestr = 0
+        if not file_contents:
+            if self.use_mmap:
+                open_mode = "r+b"
+            else:
+                open_mode = "rb"
+            retry = False
+            try:
+                f = open(filename, open_mode)
+            except IOError:
+                e, v = sys.exc_info()[:2]
+                if open_mode == "r+b" and \
+                   (v.errno == 13 or v.strerror == "Permission denied"):
+                    # Maybe the file is read-only
+                    retry = True
+                    self.use_mmap = False
+                else:
+                    raise
+            if retry:
+                f = open(filename, "rb")
+            if self.use_mmap:
+                f.seek(0, 2) # EOF
+                size = f.tell()
+                f.seek(0, 0) # BOF
+                filestr = mmap.mmap(f.fileno(), size, access=mmap.ACCESS_READ)
+                need_close_filestr = 1
+                self.stream_len = size
+            else:
+                filestr = f.read()
+                self.stream_len = len(filestr)
+            f.close()
+        else:
+            filestr = file_contents
+            self.stream_len = len(file_contents)
+
+        self.base = 0
+        if filestr[:8] != compdoc.SIGNATURE:
+            # got this one at the antique store
+            self.mem = filestr
+        else:
+            cd = compdoc.CompDoc(filestr, logfile=self.logfile)
+            if USE_FANCY_CD:
+                for qname in ['Workbook', 'Book']:
+                    self.mem, self.base, self.stream_len = cd.locate_named_stream(qname)
+                    if self.mem: break
+                else:
+                    raise XLRDError("Can't find workbook in OLE2 compound document")
+            else:
+                for qname in ['Workbook', 'Book']:
+                    self.mem = cd.get_named_stream(qname)
+                    if self.mem: break
+                else:
+                    raise XLRDError("Can't find workbook in OLE2 compound document")
+                self.stream_len = len(self.mem)
+            del cd
+            if self.mem is not filestr:
+                if need_close_filestr:
+                    filestr.close()
+                del filestr
+        self._position = self.base
+        if DEBUG:
+            print("mem: %s, base: %d, len: %d" % (type(self.mem), self.base, self.stream_len), file=self.logfile)
+
+    def initialise_format_info(self):
+        # needs to be done once per sheet for BIFF 4W :-(
+        self.format_map = {}
+        self.format_list = []
+        self.xfcount = 0
+        self.actualfmtcount = 0 # number of FORMAT records seen so far
+        self._xf_index_to_xl_type_map = {}
+        self._xf_epilogue_done = 0
+        self.xf_list = []
+        self.font_list = []
+
+    def release_resources(self):
+        self._resources_released = 1
+        del self.mem
+        del self._sharedstrings
+
+    def get2bytes(self):
+        pos = self._position
+        buff_two = self.mem[pos:pos+2]
+        lenbuff = len(buff_two)
+        self._position += lenbuff
+        if lenbuff < 2:
+            return MY_EOF
+        lo, hi = buff_two
+        return (hi << 8) | lo #(to_py3):
+
+    def get_record_parts(self):
+        pos = self._position
+        mem = self.mem
+        code, length = unpack('<HH', mem[pos:pos+4])
+        pos += 4
+        data = mem[pos:pos+length]
+        self._position = pos + length
+        return (code, length, data)
+
+    def get_record_parts_conditional(self, reqd_record):
+        pos = self._position
+        mem = self.mem
+        code, length = unpack('<HH', mem[pos:pos+4])
+        if code != reqd_record:
+            return (None, 0, '')
+        pos += 4
+        data = mem[pos:pos+length]
+        self._position = pos + length
+        return (code, length, data)
+
+    def get_sheet(self, sh_number, update_pos=True):
+        if self._resources_released:
+            raise XLRDError("Can't load sheets after releasing resources.")
+        if update_pos:
+            self._position = self._sh_abs_posn[sh_number]
+        _unused_biff_version = self.getbof(XL_WORKSHEET)
+        # assert biff_version == self.biff_version ### FAILS
+        # Have an example where book is v7 but sheet reports v8!!!
+        # It appears to work OK if the sheet version is ignored.
+        # Confirmed by Daniel Rentz: happens when Excel does "save as"
+        # creating an old version file; ignore version details on sheet BOF.
+        sh = sheet.Sheet(self,
+                self._position,
+                self._sheet_names[sh_number],
+                sh_number)
+        sh.read(self)
+        self._sheet_list[sh_number] = sh
+        return sh
+
+    def get_sheets(self):
+        if DEBUG:
+            print("GET_SHEETS:", self._sheet_names, self._sh_abs_posn,
+                  file=self.logfile)
+        for sheetno in range(len(self._sheet_names)):
+            if DEBUG:
+                print("GET_SHEETS: sheetno =", sheetno, self._sheet_names,
+                      self._sh_abs_posn, file=self.logfile)
+            self.get_sheet(sheetno)
+
+    def fake_globals_get_sheet(self): # for BIFF 4.0 and earlier
+        formatting.initialise_book(self)
+        fake_sheet_name = 'Sheet 1'
+        self._sheet_names = [fake_sheet_name]
+        self._sh_abs_posn = [0]
+        self._sheet_visibility = [0] # one sheet, visible
+        self._sheet_list.append(None) # get_sheet updates _sheet_list but needs a None beforehand
+        self.get_sheets()
+
+    def handle_boundsheet(self, data):
+        self.derive_encoding()
+        if DEBUG:
+            fprintf(self.logfile, "BOUNDSHEET: bv=%d data %r\n", self.biff_version, data)
+        if self.biff_version == 45: # BIFF4W
+            #### Not documented in OOo docs ...
+            # In fact, the *only* data is the name of the sheet.
+            sheet_name = unpack_string(data, 0, self.encoding, lenlen=1)
+            visibility = 0
+            sheet_type = XL_BOUNDSHEET_WORKSHEET # guess, patch later
+            if len(self._sh_abs_posn) == 0:
+                abs_posn = self._sheetsoffset + self.base
+                # Note (a) this won't be used
+                # (b) it's the position of the SHEETHDR record
+                # (c) add 11 to get to the worksheet BOF record
+            else:
+                abs_posn = -1 # unknown
+        else:
+            offset, visibility, sheet_type = unpack('<iBB', data[0:6])
+            abs_posn = offset + self.base # because global BOF is always at posn 0 in the stream
+            if self.biff_version < BIFF_FIRST_UNICODE:
+                sheet_name = unpack_string(data, 6, self.encoding, lenlen=1)
+            else:
+                sheet_name = unpack_unicode(data, 6, lenlen=1)
+
+        if DEBUG or self.verbosity >= 2:
+            fprintf(self.logfile,
+                "BOUNDSHEET: inx=%d vis=%r sheet_name=%r abs_posn=%d sheet_type=0x%02x\n",
+                self._all_sheets_count, visibility, sheet_name, abs_posn, sheet_type)
+        self._all_sheets_count += 1
+        if sheet_type != XL_BOUNDSHEET_WORKSHEET:
+            self._all_sheets_map.append(-1)
+            descr = {
+                1: 'Macro sheet',
+                2: 'Chart',
+                6: 'Visual Basic module',
+                }.get(sheet_type, 'UNKNOWN')
+
+            fprintf(self.logfile,
+                "NOTE *** Ignoring non-worksheet data named %r (type 0x%02x = %s)\n",
+                sheet_name, sheet_type, descr)
+        else:
+            snum = len(self._sheet_names)
+            self._all_sheets_map.append(snum)
+            self._sheet_names.append(sheet_name)
+            self._sh_abs_posn.append(abs_posn)
+            self._sheet_visibility.append(visibility)
+            self._sheet_num_from_name[sheet_name] = snum
+
+    def handle_builtinfmtcount(self, data):
+        # N.B. This count appears to be utterly useless.
+        builtinfmtcount = unpack('<H', data[0:2])[0]
+        if DEBUG:
+            fprintf(self.logfile, "BUILTINFMTCOUNT: %r\n", builtinfmtcount)
+        self.builtinfmtcount = builtinfmtcount
+
+    def derive_encoding(self):
+        if self.encoding_override:
+            self.encoding = self.encoding_override
+        elif self.codepage is None:
+            if self.biff_version < 80:
+                fprintf(self.logfile,
+                    "*** No CODEPAGE record, no encoding_override: will use 'ascii'\n")
+                self.encoding = 'ascii'
+            else:
+                self.codepage = 1200 # utf16le
+                if self.verbosity >= 2:
+                    fprintf(self.logfile, "*** No CODEPAGE record; assuming 1200 (utf_16_le)\n")
+        else:
+            codepage = self.codepage
+            if codepage in encoding_from_codepage:
+                encoding = encoding_from_codepage[codepage]
+            elif 300 <= codepage <= 1999:
+                encoding = 'cp' + str(codepage)
+            else:
+                encoding = 'unknown_codepage_' + str(codepage)
+            if DEBUG or (self.verbosity and encoding != self.encoding) :
+                fprintf(self.logfile, "CODEPAGE: codepage %r -> encoding %r\n",
+                        codepage, encoding)
+            self.encoding = encoding
+        if self.codepage != 1200: # utf_16_le
+            # If we don't have a codec that can decode ASCII into Unicode,
+            # we're well & truly stuffed -- let the punter know ASAP.
+            try:
+                _unused = str(b'trial', self.encoding)
+            except:
+                ei = sys.exc_info()[:2]
+                fprintf(self.logfile,
+                    "ERROR *** codepage %r -> encoding %r -> %s: %s\n",
+                    self.codepage, self.encoding, ei[0].__name__.split(".")[-1], ei[1])
+                raise
+        if self.raw_user_name:
+            strg = unpack_string(self.user_name, 0, self.encoding, lenlen=1)
+            strg = strg.rstrip()
+            self.user_name = strg
+            self.raw_user_name = False
+        return self.encoding
+
+    def handle_codepage(self, data):
+        codepage = unpack('<H', data[0:2])[0]
+        self.codepage = codepage
+        self.derive_encoding()
+
+    def handle_country(self, data):
+        countries = unpack('<HH', data[0:4])
+        if self.verbosity:
+            print("Countries:", countries, file=self.logfile)
+        # Note: in BIFF7 and earlier, country record was put (redundantly?) in each worksheet.
+        assert self.countries == (0, 0) or self.countries == countries
+        self.countries = countries
+
+    def handle_datemode(self, data):
+        datemode = unpack('<H', data[0:2])[0]
+        if DEBUG or self.verbosity:
+            fprintf(self.logfile, "DATEMODE: datemode %r\n", datemode)
+        assert datemode in (0, 1)
+        self.datemode = datemode
+
+    def handle_externname(self, data):
+        verbose = DEBUG or self.verbosity >= 2
+        if self.biff_version >= 80:
+            option_flags, other_info =unpack("<HI", data[:6])
+            pos = 6
+            name, pos = unpack_unicode_update_pos(data, pos, lenlen=1)
+            extra = data[pos:]
+            if self._supbook_types[-1] == SUPBOOK_ADDIN:
+                self.addin_func_names.append(name)
+            if verbose:
+                fprintf(self.logfile,
+                    "EXTERNNAME: sbktype=%d oflags=0x%04x oinfo=0x%08x name=%r extra=%r\n",
+                    self._supbook_types[-1], option_flags, other_info, name, extra)
+
+    def handle_externsheet(self, data):
+        self.derive_encoding() # in case CODEPAGE record missing/out of order/wrong
+        self._extnsht_count += 1 # for use as a 1-based index
+        verbose1 = DEBUG or self.verbosity >= 1
+        verbose2 = DEBUG or self.verbosity >= 2
+        if self.biff_version >= 80:
+            num_refs = unpack("<H", data[0:2])[0]
+            bytes_reqd = num_refs * 6 + 2
+            while len(data) < bytes_reqd:
+                if verbose1:
+                    fprintf(
+                        self.logfile,
+                        "INFO: EXTERNSHEET needs %d bytes, have %d\n",
+                        bytes_reqd, len(data))
+                code2, length2, data2 = self.get_record_parts()
+                if code2 != XL_CONTINUE:
+                    raise XLRDError("Missing CONTINUE after EXTERNSHEET record")
+                data += data2
+            pos = 2
+            for k in range(num_refs):
+                info = unpack("<HHH", data[pos:pos+6])
+                ref_recordx, ref_first_sheetx, ref_last_sheetx = info
+                self._externsheet_info.append(info)
+                pos += 6
+                if verbose2:
+                    fprintf(
+                        self.logfile,
+                        "EXTERNSHEET(b8): k = %2d, record = %2d, first_sheet = %5d, last sheet = %5d\n",
+                        k, ref_recordx, ref_first_sheetx, ref_last_sheetx)
+        else:
+            nc, ty = unpack("<BB", data[:2])
+            if verbose2:
+                print("EXTERNSHEET(b7-):")
+                hex_char_dump(data, 0, len(data))
+                msg = {
+                    1: "Encoded URL",
+                    2: "Current sheet!!",
+                    3: "Specific sheet in own doc't",
+                    4: "Nonspecific sheet in own doc't!!",
+                    }.get(ty, "Not encoded")
+                print("   %3d chars, type is %d (%s)" % (nc, ty, msg))
+            if ty == 3:
+                sheet_name = str(data[2:nc+2], self.encoding)
+                self._extnsht_name_from_num[self._extnsht_count] = sheet_name
+                if verbose2: print(self._extnsht_name_from_num)
+            if not (1 <= ty <= 4):
+                ty = 0
+            self._externsheet_type_b57.append(ty)
+
+    def handle_filepass(self, data):
+        if self.verbosity >= 2:
+            logf = self.logfile
+            fprintf(logf, "FILEPASS:\n")
+            hex_char_dump(data, 0, len(data), base=0, fout=logf)
+            if self.biff_version >= 80:
+                kind1, = unpack('<H', data[:2])
+                if kind1 == 0: # weak XOR encryption
+                    key, hash_value = unpack('<HH', data[2:])
+                    fprintf(logf,
+                        'weak XOR: key=0x%04x hash=0x%04x\n',
+                        key, hash_value)
+                elif kind1 == 1:
+                    kind2, = unpack('<H', data[4:6])
+                    if kind2 == 1: # BIFF8 standard encryption
+                        caption = "BIFF8 std"
+                    elif kind2 == 2:
+                        caption = "BIFF8 strong"
+                    else:
+                        caption = "** UNKNOWN ENCRYPTION METHOD **"
+                    fprintf(logf, "%s\n", caption)
+        raise XLRDError("Workbook is encrypted")
+
+    def handle_name(self, data):
+        verbose = DEBUG or self.verbosity >= 2
+        if self.biff_version < 50:
+            return
+        self.derive_encoding()
+
+        # unpack
+        (option_flags,
+        kb_shortcut,
+        name_len,
+        fmla_len,
+        extsht_index,
+        sheet_index,
+        menu_text_len,
+        description_text_len,
+        help_topic_text_len,
+        status_bar_text_len) = unpack("<HBBHHH4B", data[0:14])
+
+        nobj = Name()
+        nobj.book = self ### CIRCULAR ###
+        name_index = len(self.name_obj_list)
+        nobj.name_index = name_index
+        self.name_obj_list.append(nobj)
+        nobj.option_flags = option_flags
+        for attr, mask, nshift in (
+            ('hidden', 1, 0),
+            ('func', 2, 1),
+            ('vbasic', 4, 2),
+            ('macro', 8, 3),
+            ('complex', 0x10, 4),
+            ('builtin', 0x20, 5),
+            ('funcgroup', 0xFC0, 6),
+            ('binary', 0x1000, 12),
+            ):
+            setattr(nobj, attr, (option_flags & mask) >> nshift)
+
+        macro_flag = " M"[nobj.macro]
+        if self.biff_version < 80:
+            internal_name, pos = unpack_string_update_pos(data, 14, self.encoding, known_len=name_len)
+        else:
+            internal_name, pos = unpack_unicode_update_pos(data, 14, known_len=name_len)
+        nobj.extn_sheet_num = extsht_index
+        nobj.excel_sheet_index = sheet_index
+        nobj.scope = None # patched up in the names_epilogue() method
+        if verbose:
+            print("NAME[%d]:%s oflags=%d, name_len=%d, fmla_len=%d, extsht_index=%d, sheet_index=%d, name=%r" \
+                % (name_index, macro_flag, option_flags, name_len,
+                fmla_len, extsht_index, sheet_index, internal_name))
+        name = internal_name
+        if nobj.builtin:
+            name = builtin_name_from_code.get(name, "??Unknown??")
+            if verbose: print("    builtin: %s" % name)
+        nobj.name = name
+        nobj.raw_formula = data[pos:]
+        nobj.basic_formula_len = fmla_len
+        nobj.evaluated = 0
+        if verbose:
+            nobj.dump(self.logfile,
+                      header="--- handle_name: name[%d] ---" % name_index,
+                      footer="-------------------")
+
+    def names_epilogue(self):
+        verbose = self.verbosity >= 2
+        f = self.logfile
+        if verbose:
+            print("+++++ names_epilogue +++++", file=f)
+            print("_all_sheets_map", self._all_sheets_map, file=f)
+            print("_extnsht_name_from_num", self._extnsht_name_from_num, file=f)
+            print("_sheet_num_from_name", self._sheet_num_from_name, file=f)
+        num_names = len(self.name_obj_list)
+        for namex in range(num_names):
+            nobj = self.name_obj_list[namex]
+            # Convert from excel_sheet_index to scope.
+            # This is done here because in BIFF7 and earlier, the
+            # BOUNDSHEET records (from which _all_sheets_map is derived)
+            # come after the NAME records.
+            if self.biff_version >= 80:
+                sheet_index = nobj.excel_sheet_index
+                if sheet_index == 0:
+                    intl_sheet_index = -1 # global
+                elif 1 <= sheet_index <= len(self._all_sheets_map):
+                    intl_sheet_index = self._all_sheets_map[sheet_index-1]
+                    if intl_sheet_index == -1: # maps to a macro or VBA sheet
+                        intl_sheet_index = -2 # valid sheet reference but not useful
+                else:
+                    # huh?
+                    intl_sheet_index = -3 # invalid
+            elif 50 <= self.biff_version <= 70:
+                sheet_index = nobj.extn_sheet_num
+                if sheet_index == 0:
+                    intl_sheet_index = -1 # global
+                else:
+                    sheet_name = self._extnsht_name_from_num[sheet_index]
+                    intl_sheet_index = self._sheet_num_from_name.get(sheet_name, -2)
+            nobj.scope = intl_sheet_index
+
+        for namex in range(num_names):
+            nobj = self.name_obj_list[namex]
+            # Parse the formula ...
+            if nobj.macro or nobj.binary: continue
+            if nobj.evaluated: continue
+            evaluate_name_formula(self, nobj, namex, verbose=verbose)
+
+        if self.verbosity >= 2:
+            print("---------- name object dump ----------", file=f)
+            for namex in range(num_names):
+                nobj = self.name_obj_list[namex]
+                nobj.dump(f, header="--- name[%d] ---" % namex)
+            print("--------------------------------------", file=f)
+        #
+        # Build some dicts for access to the name objects
+        #
+        name_and_scope_map = {}
+        name_map = {}
+        for namex in range(num_names):
+            nobj = self.name_obj_list[namex]
+            name_lcase = nobj.name.lower()
+            key = (name_lcase, nobj.scope)
+            if key in name_and_scope_map:
+                msg = 'Duplicate entry %r in name_and_scope_map' % (key, )
+                if 0:
+                    raise XLRDError(msg)
+                else:
+                    if self.verbosity:
+                        print(msg, file=f)
+            name_and_scope_map[key] = nobj
+            if name_lcase in name_map:
+                name_map[name_lcase].append((nobj.scope, nobj))
+            else:
+                name_map[name_lcase] = [(nobj.scope, nobj)]
+        for key in list(name_map.keys()):
+            alist = name_map[key]
+            alist.sort()
+            name_map[key] = [x[1] for x in alist]
+        self.name_and_scope_map = name_and_scope_map
+        self.name_map = name_map
+
+    def handle_obj(self, data):
+        # Not doing much handling at all.
+        # Worrying about embedded (BOF ... EOF) substreams is done elsewhere.
+        obj_type, obj_id = unpack('<HI', data[4:10])
+
+    def handle_supbook(self, data):
+        self._supbook_types.append(None)
+        verbose = DEBUG or self.verbosity >= 2
+        num_sheets = unpack("<H", data[0:2])[0]
+        sbn = self._supbook_count
+        self._supbook_count += 1
+        if data[2:4] == b"\x01\x04":
+            self._supbook_types[-1] = SUPBOOK_INTERNAL
+            self._supbook_locals_inx = self._supbook_count - 1
+            if verbose:
+                print("SUPBOOK[%d]: internal 3D refs; %d sheets" % (sbn, num_sheets))
+                print("    _all_sheets_map", self._all_sheets_map)
+            return
+
+        if data[0:4] == b"\x01\x00\x01\x3A":
+            self._supbook_types[-1] = SUPBOOK_ADDIN
+            self._supbook_addins_inx = self._supbook_count - 1
+            if verbose:
+                print("SUPBOOK[%d]: add-in functions" % sbn)
+            return
+
+        url, pos = unpack_unicode_update_pos(data, 2, lenlen=2)
+        if num_sheets == 0:
+            self._supbook_types[-1] = SUPBOOK_DDEOLE
+            if verbose:
+                print("SUPBOOK[%d]: DDE/OLE document = %r" % (sbn, url))
+            return
+
+        self._supbook_types[-1] = SUPBOOK_EXTERNAL
+        if verbose:
+            print("SUPBOOK[%d]: url = %r" % (sbn, url))
+        sheet_names = []
+        for x in range(num_sheets):
+            shname, pos = unpack_unicode_update_pos(data, pos, lenlen=2)
+            sheet_names.append(shname)
+            if verbose:
+                print("    sheet %d: %r" % (x, shname))
+
+    def handle_sheethdr(self, data):
+        # This a BIFF 4W special.
+        # The SHEETHDR record is followed by a (BOF ... EOF) substream containing
+        # a worksheet.
+        self.derive_encoding()
+        sheet_len = unpack('<i', data[:4])[0]
+        sheet_name = unpack_string(data, 4, self.encoding, lenlen=1)
+        sheetno = self._sheethdr_count
+        assert sheet_name == self._sheet_names[sheetno]
+        self._sheethdr_count += 1
+        BOF_posn = self._position
+        posn = BOF_posn - 4 - len(data)
+        if DEBUG:
+            print('SHEETHDR %d at posn %d: len=%d name=%r' % (sheetno, posn, sheet_len, sheet_name), file=self.logfile)
+        self.initialise_format_info()
+        if DEBUG:
+            print('SHEETHDR: xf epilogue flag is %d' % self._xf_epilogue_done, file=self.logfile)
+        self._sheet_list.append(None) # get_sheet updates _sheet_list but needs a None beforehand
+        self.get_sheet(sheetno, update_pos=False)
+        if DEBUG:
+            print('SHEETHDR: posn after get_sheet() =', self._position, file=self.logfile)
+        self._position = BOF_posn + sheet_len
+
+    def handle_sheetsoffset(self, data):
+        posn = unpack('<i', data)[0]
+        if DEBUG:
+            print('SHEETSOFFSET:', posn, file=self.logfile)
+        self._sheetsoffset = posn
+
+    def handle_sst(self, data):
+        if DEBUG:
+            print("SST Processing", file=self.logfile)
+            t0 = time.time()
+        nbt = len(data)
+        strlist = [data]
+        uniquestrings = unpack('<i', data[4:8])[0]
+        if DEBUG or self.verbosity >= 2:
+            fprintf(self.logfile, "SST: unique strings: %d\n", uniquestrings)
+        while True:
+            code, nb, data = self.get_record_parts_conditional(XL_CONTINUE)
+            if code is None:
+                break
+            nbt += nb
+            if DEBUG:
+                fprintf(self.logfile, "CONTINUE: adding %d bytes to SST -> %d\n", nb, nbt)
+            strlist.append(data)
+        self._sharedstrings = unpack_SST_table(strlist, uniquestrings)
+        if DEBUG:
+            t1 = time.time()
+            print("SST processing took %.2f seconds" % (t1 - t0, ), file=self.logfile)
+
+    def handle_writeaccess(self, data):
+        if self.biff_version < 80:
+            if not self.encoding:
+                self.raw_user_name = True
+                self.user_name = data
+                return
+            strg = unpack_string(data, 0, self.encoding, lenlen=1)
+        else:
+            strg = unpack_unicode(data, 0, lenlen=2)
+        if DEBUG:
+            print("WRITEACCESS: %d bytes; raw=%d %r" % (len(data), self.raw_user_name, strg), file=self.logfile)
+        strg = strg.rstrip()
+        self.user_name = strg
+
+    def parse_globals(self):
+        # no need to position, just start reading (after the BOF)
+        formatting.initialise_book(self)
+        while True:
+            rc, length, data = self.get_record_parts()
+            if DEBUG:
+                print("parse_globals: record code is 0x%04x" % rc)
+            if rc == XL_SST:
+                self.handle_sst(data)
+            elif rc == XL_FONT or rc == XL_FONT_B3B4:
+                self.handle_font(data)
+            elif rc == XL_FORMAT: # XL_FORMAT2 is BIFF <= 3.0, can't appear in globals
+                self.handle_format(data)
+            elif rc == XL_XF:
+                self.handle_xf(data)
+            elif rc ==  XL_BOUNDSHEET:
+                self.handle_boundsheet(data)
+            elif rc == XL_DATEMODE:
+                self.handle_datemode(data)
+            elif rc == XL_CODEPAGE:
+                self.handle_codepage(data)
+            elif rc == XL_COUNTRY:
+                self.handle_country(data)
+            elif rc == XL_EXTERNNAME:
+                self.handle_externname(data)
+            elif rc == XL_EXTERNSHEET:
+                self.handle_externsheet(data)
+            elif rc == XL_FILEPASS:
+                self.handle_filepass(data)
+            elif rc == XL_WRITEACCESS:
+                self.handle_writeaccess(data)
+            elif rc == XL_SHEETSOFFSET:
+                self.handle_sheetsoffset(data)
+            elif rc == XL_SHEETHDR:
+                self.handle_sheethdr(data)
+            elif rc == XL_SUPBOOK:
+                self.handle_supbook(data)
+            elif rc == XL_NAME:
+                self.handle_name(data)
+            elif rc == XL_PALETTE:
+                self.handle_palette(data)
+            elif rc == XL_STYLE:
+                self.handle_style(data)
+            elif rc & 0xff == 9:
+                print("*** Unexpected BOF at posn %d: 0x%04x len=%d data=%r" \
+                    % (self._position - length - 4, rc, length, data), file=self.logfile)
+            elif rc ==  XL_EOF:
+                self.xf_epilogue()
+                self.names_epilogue()
+                self.palette_epilogue()
+                if not self.encoding:
+                    self.derive_encoding()
+                if self.biff_version == 45:
+                    if DEBUG:
+                        print("global EOF: position", self._position)
+                return
+
+    def read(self, pos, length):
+        data = self.mem[pos:pos+length]
+        self._position = pos + len(data)
+        return data
+
+    def getbof(self, rqd_stream):
+        def bof_error(msg):
+            raise XLRDError('Unsupported format, or corrupt file: ' + msg)
+
+        if DEBUG:
+            print("reqd: 0x%04x" % rqd_stream, file=self.logfile)
+
+        savpos = self._position
+        opcode = self.get2bytes()
+
+        if opcode == MY_EOF:
+            bof_error('Expected BOF record; met end of file')
+
+        if opcode not in bofcodes:
+            bof_error('Expected BOF record; found %r' % self.mem[savpos:savpos+8])
+
+        length = self.get2bytes()
+        if length == MY_EOF:
+            bof_error('Incomplete BOF record[1]; met end of file')
+
+        if length < boflen[opcode] or length > 20:
+            bof_error('Invalid length (%d) for BOF record type 0x%04x' % (length, opcode))
+
+        data = self.read(self._position, length);
+        if DEBUG: print("\ngetbof(): data=%r" % data, file=self.logfile)
+        if len(data) < length:
+            bof_error('Incomplete BOF record[2]; met end of file')
+        version1 = opcode >> 8
+        version2, streamtype = unpack('<HH', data[0:4])
+        if DEBUG:
+            print("getbof(): op=0x%04x version2=0x%04x streamtype=0x%04x" \
+                % (opcode, version2, streamtype), file=self.logfile)
+        bof_offset = self._position - 4 - length
+        if DEBUG:
+            print("getbof(): BOF found at offset %d; savpos=%d" \
+                % (bof_offset, savpos), file=self.logfile)
+        version = build = year = 0
+        if version1 == 0x08:
+            build, year = unpack('<HH', data[4:8])
+            if version2 == 0x0600:
+                version = 80
+            elif version2 == 0x0500:
+                if year < 1994 or build in (2412, 3218, 3321):
+                    version = 50
+                else:
+                    version = 70
+            else:
+                # dodgy one, created by a 3rd-party tool
+                version = {
+                    0x0000: 21,
+                    0x0007: 21,
+                    0x0200: 21,
+                    0x0300: 30,
+                    0x0400: 40,
+                    }.get(version2, 0)
+        elif version1 in (0x04, 0x02, 0x00):
+            version = {0x04: 40, 0x02: 30, 0x00: 21}[version1]
+
+        if version == 40 and streamtype == XL_WORKBOOK_GLOBALS_4W:
+            version = 45 # i.e. 4W
+
+        if DEBUG or self.verbosity >= 2:
+            print("BOF: op=0x%04x vers=0x%04x stream=0x%04x buildid=%d buildyr=%d -> BIFF%d" \
+                % (opcode, version2, streamtype, build, year, version), file=self.logfile)
+        got_globals = streamtype == XL_WORKBOOK_GLOBALS or (
+            version == 45 and streamtype == XL_WORKBOOK_GLOBALS_4W)
+        if (rqd_stream == XL_WORKBOOK_GLOBALS and got_globals) or streamtype == rqd_stream:
+            return version
+        if version < 50 and streamtype == XL_WORKSHEET:
+            return version
+        if version >= 50 and streamtype == 0x0100:
+            bof_error("Workspace file -- no spreadsheet data")
+        bof_error(
+            'BOF not workbook/worksheet: op=0x%04x vers=0x%04x strm=0x%04x build=%d year=%d -> BIFF%d' \
+            % (opcode, version2, streamtype, build, year, version))
+
+# === helper functions
+
+def expand_cell_address(inrow, incol):
+    # Ref : OOo docs, "4.3.4 Cell Addresses in BIFF8"
+    outrow = inrow
+    if incol & 0x8000:
+        if outrow >= 32768:
+            outrow -= 65536
+        relrow = 1
+    else:
+        relrow = 0
+    outcol = incol & 0xFF
+    if incol & 0x4000:
+        if outcol >= 128:
+            outcol -= 256
+        relcol = 1
+    else:
+        relcol = 0
+    return outrow, outcol, relrow, relcol
+
+def colname(colx, _A2Z="ABCDEFGHIJKLMNOPQRSTUVWXYZ"):
+    assert colx >= 0
+    name = ''
+    while True:
+        quot, rem = divmod(colx, 26)
+        name = _A2Z[rem] + name
+        if not quot:
+            return name
+        colx = quot - 1
+
+def display_cell_address(rowx, colx, relrow, relcol):
+    if relrow:
+        rowpart = "(*%s%d)" % ("+-"[rowx < 0], abs(rowx))
+    else:
+        rowpart = "$%d" % (rowx+1,)
+    if relcol:
+        colpart = "(*%s%d)" % ("+-"[colx < 0], abs(colx))
+    else:
+        colpart = "$" + colname(colx)
+    return colpart + rowpart
+
+def unpack_SST_table(datatab, nstrings):
+    """ Return list of strings """
+    datainx = 0
+    ndatas = len(datatab)
+    data = datatab[0]
+    datalen = len(data)
+    pos = 8
+    strings = []
+    strappend = strings.append
+    local_unpack = unpack
+    local_min = min
+    #(to_py3): local_ord = ord
+    latin_1 = "latin_1"
+    for _unused_i in range(nstrings):
+        nchars = local_unpack('<H', data[pos:pos+2])[0]
+        pos += 2
+        #(to_py3): options = local_ord(data[pos])
+        options = data[pos]
+        pos += 1
+        rtsz = 0
+        if options & 0x08: # richtext
+            rtsz = 4 * local_unpack('<H', data[pos:pos+2])[0]
+            pos += 2
+        if options & 0x04: # phonetic
+            rtsz += local_unpack('<i', data[pos:pos+4])[0]
+            pos += 4
+        accstrg = ''
+        charsgot = 0
+        while True:
+            charsneed = nchars - charsgot
+            if options & 0x01:
+                # Uncompressed UTF-16
+                charsavail = local_min((datalen - pos) >> 1, charsneed)
+                rawstrg = data[pos:pos+2*charsavail]
+                try:
+                    #(to_py3) accstrg += unicode(rawstrg, "utf_16_le")
+                    accstrg += str(rawstrg, "utf_16_le")
+                except:
+                    # print "SST U16: nchars=%d pos=%d rawstrg=%r" % (nchars, pos, rawstrg)
+                    # Probable cause: dodgy data e.g. unfinished surrogate pair.
+                    # E.g. file unicode2.xls in pyExcelerator's examples has cells containing
+                    # unichr(i) for i in range(0x100000)
+                    # so this will include 0xD800 etc
+                    raise
+                pos += (2 * charsavail)
+            else:
+                # Note: this is COMPRESSED (not ASCII!) encoding!!!
+                charsavail = local_min(datalen - pos, charsneed)
+                rawstrg = data[pos:pos+charsavail]
+                #(to_py3) accstrg += unicode(rawstrg, latin_1)
+                accstrg += str(rawstrg, latin_1)
+                pos += charsavail
+            charsgot += charsavail
+            if charsgot == nchars:
+                break
+            datainx += 1
+            data = datatab[datainx]
+            datalen = len(data)
+            #(to_py3): options = local_ord(data[0])
+            options = data[0]
+            pos = 1
+        pos += rtsz # size of richtext & phonetic stuff to skip
+        # also allow for the rich text etc being split ...
+        if pos >= datalen:
+            # adjust to correct position in next record
+            pos = pos - datalen
+            datainx += 1
+            if datainx < ndatas:
+                data = datatab[datainx]
+                datalen = len(data)
+            else:
+                assert _unused_i == nstrings - 1
+        strappend(accstrg)
+    return strings
diff --git a/tablib/packages/xlrd3/biffh.py b/tablib/packages/xlrd3/biffh.py
new file mode 100644
index 0000000..d99e3a3
--- /dev/null
+++ b/tablib/packages/xlrd3/biffh.py
@@ -0,0 +1,620 @@
+# Support module for the xlrd3 package.
+#
+# Portions copyright (c) 2005-2008 Stephen John Machin, Lingfo Pty Ltd
+# This module is part of the xlrd package, which is released under a
+# BSD-style licence.
+#
+# 2010-12-08 mozman refactoring for python 3
+# 2008-02-10 SJM BIFF2 BLANK record
+# 2008-02-08 SJM Preparation for Excel 2.0 support
+# 2008-02-02 SJM Added suffixes (_B2, _B2_ONLY, etc) on record names for
+#                biff_dump & biff_count
+# 2007-12-04 SJM Added support for Excel 2.x (BIFF2) files.
+# 2007-09-08 SJM Avoid crash when zero-length Unicode string missing options byte.
+# 2007-04-22 SJM Remove experimental "trimming" facility.
+
+import sys
+from struct import unpack
+
+encoding_from_codepage = {
+    1200 : 'utf_16_le',
+    10000: 'mac_roman',
+    10006: 'mac_greek', # guess
+    10007: 'mac_cyrillic', # guess
+    10029: 'mac_latin2', # guess
+    10079: 'mac_iceland', # guess
+    10081: 'mac_turkish', # guess
+    32768: 'mac_roman',
+    32769: 'cp1252',
+    }
+
+# some more guessing, for Indic scripts
+# codepage 57000 range:
+# 2 Devanagari [0]
+# 3 Bengali [1]
+# 4 Tamil [5]
+# 5 Telegu [6]
+# 6 Assamese [1] c.f. Bengali
+# 7 Oriya [4]
+# 8 Kannada [7]
+# 9 Malayalam [8]
+# 10 Gujarati [3]
+# 11 Gurmukhi [2]
+
+FUN = 0 # unknown
+FDT = 1 # date
+FNU = 2 # number
+FGE = 3 # general
+FTX = 4 # text
+
+DATEFORMAT = FDT
+NUMBERFORMAT = FNU
+
+XL_CELL_EMPTY = 0
+XL_CELL_TEXT = 1
+XL_CELL_NUMBER = 2
+XL_CELL_DATE = 3
+XL_CELL_BOOLEAN = 4
+XL_CELL_ERROR = 5
+XL_CELL_BLANK = 6 # for use in debugging, gathering stats, etc
+
+biff_text_from_num = {
+    0:  "(not BIFF)",
+    20: "2.0",
+    21: "2.1",
+    30: "3",
+    40: "4S",
+    45: "4W",
+    50: "5",
+    70: "7",
+    80: "8",
+    85: "8X",
+}
+
+# This dictionary can be used to produce a text version of the internal codes
+# that Excel uses for error cells. Here are its contents:
+error_text_from_code = {
+    0x00: '#NULL!',  # Intersection of two cell ranges is empty
+    0x07: '#DIV/0!', # Division by zero
+    0x0F: '#VALUE!', # Wrong type of operand
+    0x17: '#REF!',   # Illegal or deleted cell reference
+    0x1D: '#NAME?',  # Wrong function or range name
+    0x24: '#NUM!',   # Value range overflow
+    0x2A: '#N/A!',   # Argument or function not available
+}
+
+BIFF_FIRST_UNICODE = 80
+
+XL_WORKBOOK_GLOBALS = WBKBLOBAL = 0x5
+XL_WORKBOOK_GLOBALS_4W = 0x100
+XL_WORKSHEET = WRKSHEET = 0x10
+
+XL_BOUNDSHEET_WORKSHEET = 0x00
+XL_BOUNDSHEET_CHART     = 0x02
+XL_BOUNDSHEET_VB_MODULE = 0x06
+
+# XL_RK2 = 0x7e
+XL_ARRAY  = 0x0221
+XL_ARRAY2 = 0x0021
+XL_BLANK = 0x0201
+XL_BLANK_B2 = 0x01
+XL_BOF = 0x809
+XL_BOOLERR = 0x205
+XL_BOOLERR_B2 = 0x5
+XL_BOUNDSHEET = 0x85
+XL_BUILTINFMTCOUNT = 0x56
+XL_CF = 0x01B1
+XL_CODEPAGE = 0x42
+XL_COLINFO = 0x7D
+XL_COLUMNDEFAULT = 0x20 # BIFF2 only
+XL_COLWIDTH = 0x24 # BIFF2 only
+XL_CONDFMT = 0x01B0
+XL_CONTINUE = 0x3c
+XL_COUNTRY = 0x8C
+XL_DATEMODE = 0x22
+XL_DEFAULTROWHEIGHT = 0x0225
+XL_DEFCOLWIDTH = 0x55
+XL_DIMENSION = 0x200
+XL_DIMENSION2 = 0x0
+XL_EFONT = 0x45
+XL_EOF = 0x0a
+XL_EXTERNNAME = 0x23
+XL_EXTERNSHEET = 0x17
+XL_EXTSST = 0xff
+XL_FEAT11 = 0x872
+XL_FILEPASS = 0x2f
+XL_FONT = 0x31
+XL_FONT_B3B4 = 0x231
+XL_FORMAT = 0x41e
+XL_FORMAT2 = 0x1E # BIFF2, BIFF3
+XL_FORMULA = 0x6
+XL_FORMULA3 = 0x206
+XL_FORMULA4 = 0x406
+XL_GCW = 0xab
+XL_INDEX = 0x20b
+XL_INTEGER = 0x2 # BIFF2 only
+XL_IXFE = 0x44 # BIFF2 only
+XL_LABEL = 0x204
+XL_LABEL_B2 = 0x04
+XL_LABELRANGES = 0x15f
+XL_LABELSST = 0xfd
+XL_MERGEDCELLS = 0xE5
+XL_MSO_DRAWING = 0x00EC
+XL_MSO_DRAWING_GROUP = 0x00EB
+XL_MSO_DRAWING_SELECTION = 0x00ED
+XL_MULRK = 0xbd
+XL_MULBLANK = 0xbe
+XL_NAME = 0x18
+XL_NOTE = 0x1c
+XL_NUMBER = 0x203
+XL_NUMBER_B2 = 0x3
+XL_OBJ = 0x5D
+XL_PALETTE = 0x92
+XL_RK = 0x27e
+XL_ROW = 0x208
+XL_ROW_B2 = 0x08
+XL_RSTRING = 0xd6
+XL_SHEETHDR = 0x8F # BIFF4W only
+XL_SHEETSOFFSET = 0x8E # BIFF4W only
+XL_SHRFMLA = 0x04bc
+XL_SST = 0xfc
+XL_STANDARDWIDTH = 0x99
+XL_STRING = 0x207
+XL_STRING_B2 = 0x7
+XL_STYLE = 0x293
+XL_SUPBOOK = 0x1AE
+XL_TABLEOP = 0x236
+XL_TABLEOP2 = 0x37
+XL_TABLEOP_B2 = 0x36
+XL_TXO = 0x1b6
+XL_UNCALCED = 0x5e
+XL_UNKNOWN = 0xffff
+XL_WINDOW2 = 0x023E
+XL_WRITEACCESS = 0x5C
+XL_XF = 0xe0
+XL_XF2 = 0x0043 # BIFF2 version of XF record
+XL_XF3 = 0x0243 # BIFF3 version of XF record
+XL_XF4 = 0x0443 # BIFF4 version of XF record
+
+boflen = {
+    0x0809: 8,
+    0x0409: 6,
+    0x0209: 6,
+    0x0009: 4,
+}
+
+bofcodes = (0x0809, 0x0409, 0x0209, 0x0009)
+
+XL_FORMULA_OPCODES = (0x0006, 0x0406, 0x0206)
+
+_cell_opcode_list = (
+    XL_BOOLERR,
+    XL_FORMULA,
+    XL_FORMULA3,
+    XL_FORMULA4,
+    XL_LABEL,
+    XL_LABELSST,
+    XL_MULRK,
+    XL_NUMBER,
+    XL_RK,
+    XL_RSTRING,
+)
+
+biff_rec_name_dict = {
+    0x0000: 'DIMENSIONS_B2',
+    0x0001: 'BLANK_B2',
+    0x0002: 'INTEGER_B2_ONLY',
+    0x0003: 'NUMBER_B2',
+    0x0004: 'LABEL_B2',
+    0x0005: 'BOOLERR_B2',
+    0x0006: 'FORMULA',
+    0x0007: 'STRING_B2',
+    0x0008: 'ROW_B2',
+    0x0009: 'BOF_B2',
+    0x000A: 'EOF',
+    0x000B: 'INDEX_B2_ONLY',
+    0x000C: 'CALCCOUNT',
+    0x000D: 'CALCMODE',
+    0x000E: 'PRECISION',
+    0x000F: 'REFMODE',
+    0x0010: 'DELTA',
+    0x0011: 'ITERATION',
+    0x0012: 'PROTECT',
+    0x0013: 'PASSWORD',
+    0x0014: 'HEADER',
+    0x0015: 'FOOTER',
+    0x0016: 'EXTERNCOUNT',
+    0x0017: 'EXTERNSHEET',
+    0x0018: 'NAME_B2,5+',
+    0x0019: 'WINDOWPROTECT',
+    0x001A: 'VERTICALPAGEBREAKS',
+    0x001B: 'HORIZONTALPAGEBREAKS',
+    0x001C: 'NOTE',
+    0x001D: 'SELECTION',
+    0x001E: 'FORMAT_B2-3',
+    0x001F: 'BUILTINFMTCOUNT_B2',
+    0x0020: 'COLUMNDEFAULT_B2_ONLY',
+    0x0021: 'ARRAY_B2_ONLY',
+    0x0022: 'DATEMODE',
+    0x0023: 'EXTERNNAME',
+    0x0024: 'COLWIDTH_B2_ONLY',
+    0x0025: 'DEFAULTROWHEIGHT_B2_ONLY',
+    0x0026: 'LEFTMARGIN',
+    0x0027: 'RIGHTMARGIN',
+    0x0028: 'TOPMARGIN',
+    0x0029: 'BOTTOMMARGIN',
+    0x002A: 'PRINTHEADERS',
+    0x002B: 'PRINTGRIDLINES',
+    0x002F: 'FILEPASS',
+    0x0031: 'FONT',
+    0x0032: 'FONT2_B2_ONLY',
+    0x0036: 'TABLEOP_B2',
+    0x0037: 'TABLEOP2_B2',
+    0x003C: 'CONTINUE',
+    0x003D: 'WINDOW1',
+    0x003E: 'WINDOW2_B2',
+    0x0040: 'BACKUP',
+    0x0041: 'PANE',
+    0x0042: 'CODEPAGE',
+    0x0043: 'XF_B2',
+    0x0044: 'IXFE_B2_ONLY',
+    0x0045: 'EFONT_B2_ONLY',
+    0x004D: 'PLS',
+    0x0051: 'DCONREF',
+    0x0055: 'DEFCOLWIDTH',
+    0x0056: 'BUILTINFMTCOUNT_B3-4',
+    0x0059: 'XCT',
+    0x005A: 'CRN',
+    0x005B: 'FILESHARING',
+    0x005C: 'WRITEACCESS',
+    0x005D: 'OBJECT',
+    0x005E: 'UNCALCED',
+    0x005F: 'SAVERECALC',
+    0x0063: 'OBJECTPROTECT',
+    0x007D: 'COLINFO',
+    0x007E: 'RK2_mythical_?',
+    0x0080: 'GUTS',
+    0x0081: 'WSBOOL',
+    0x0082: 'GRIDSET',
+    0x0083: 'HCENTER',
+    0x0084: 'VCENTER',
+    0x0085: 'BOUNDSHEET',
+    0x0086: 'WRITEPROT',
+    0x008C: 'COUNTRY',
+    0x008D: 'HIDEOBJ',
+    0x008E: 'SHEETSOFFSET',
+    0x008F: 'SHEETHDR',
+    0x0090: 'SORT',
+    0x0092: 'PALETTE',
+    0x0099: 'STANDARDWIDTH',
+    0x009B: 'FILTERMODE',
+    0x009C: 'FNGROUPCOUNT',
+    0x009D: 'AUTOFILTERINFO',
+    0x009E: 'AUTOFILTER',
+    0x00A0: 'SCL',
+    0x00A1: 'SETUP',
+    0x00AB: 'GCW',
+    0x00BD: 'MULRK',
+    0x00BE: 'MULBLANK',
+    0x00C1: 'MMS',
+    0x00D6: 'RSTRING',
+    0x00D7: 'DBCELL',
+    0x00DA: 'BOOKBOOL',
+    0x00DD: 'SCENPROTECT',
+    0x00E0: 'XF',
+    0x00E1: 'INTERFACEHDR',
+    0x00E2: 'INTERFACEEND',
+    0x00E5: 'MERGEDCELLS',
+    0x00E9: 'BITMAP',
+    0x00EB: 'MSO_DRAWING_GROUP',
+    0x00EC: 'MSO_DRAWING',
+    0x00ED: 'MSO_DRAWING_SELECTION',
+    0x00EF: 'PHONETIC',
+    0x00FC: 'SST',
+    0x00FD: 'LABELSST',
+    0x00FF: 'EXTSST',
+    0x013D: 'TABID',
+    0x015F: 'LABELRANGES',
+    0x0160: 'USESELFS',
+    0x0161: 'DSF',
+    0x01AE: 'SUPBOOK',
+    0x01AF: 'PROTECTIONREV4',
+    0x01B0: 'CONDFMT',
+    0x01B1: 'CF',
+    0x01B2: 'DVAL',
+    0x01B6: 'TXO',
+    0x01B7: 'REFRESHALL',
+    0x01B8: 'HLINK',
+    0x01BC: 'PASSWORDREV4',
+    0x01BE: 'DV',
+    0x01C0: 'XL9FILE',
+    0x01C1: 'RECALCID',
+    0x0200: 'DIMENSIONS',
+    0x0201: 'BLANK',
+    0x0203: 'NUMBER',
+    0x0204: 'LABEL',
+    0x0205: 'BOOLERR',
+    0x0206: 'FORMULA_B3',
+    0x0207: 'STRING',
+    0x0208: 'ROW',
+    0x0209: 'BOF',
+    0x020B: 'INDEX_B3+',
+    0x0218: 'NAME',
+    0x0221: 'ARRAY',
+    0x0223: 'EXTERNNAME_B3-4',
+    0x0225: 'DEFAULTROWHEIGHT',
+    0x0231: 'FONT_B3B4',
+    0x0236: 'TABLEOP',
+    0x023E: 'WINDOW2',
+    0x0243: 'XF_B3',
+    0x027E: 'RK',
+    0x0293: 'STYLE',
+    0x0406: 'FORMULA_B4',
+    0x0409: 'BOF',
+    0x041E: 'FORMAT',
+    0x0443: 'XF_B4',
+    0x04BC: 'SHRFMLA',
+    0x0800: 'QUICKTIP',
+    0x0809: 'BOF',
+    0x0862: 'SHEETLAYOUT',
+    0x0867: 'SHEETPROTECTION',
+    0x0868: 'RANGEPROTECTION',
+}
+
+class XLRDError(Exception):
+    pass
+
+class BaseObject:
+    """
+    Parent of almost all other classes in the package. Defines a common
+    'dump' method for debugging.
+    """
+    _repr_these = []
+
+    def dump(self, f=None, header=None, footer=None, indent=0):
+        """
+        :param f: open file object, to which the dump is written
+        :param header: text to write before the dump
+        :param footer: text to write after the dump
+        :param indent: number of leading spaces (for recursive calls)
+        """
+        if f is None:
+            f = sys.stderr
+        pad = " " * indent
+
+        if header is not None:
+            print(header, file=f)
+
+        for attr, value in sorted(self.__dict__.items()):
+            if getattr(value, 'dump', None) and attr != 'book':
+                value.dump(f,
+                    header="%s%s (%s object):" % (pad, attr, value.__class__.__name__),
+                    indent=indent+4)
+            elif attr not in self._repr_these and \
+                 (isinstance(value, list) or
+                  isinstance(value, dict)):
+                print("%s%s: %s, len = %d" % (pad, attr, type(value), len(value)), file=f)
+            else:
+                print("%s%s: %r" % (pad, attr, value), file=f)
+        if footer is not None:
+            print(footer, file=f)
+
+def fprintf(f, fmt, *vargs):
+    print(fmt.rstrip('\n') % vargs, file=f)
+
+def upkbits(tgt_obj, src, manifest, local_setattr=setattr):
+    for n, mask, attr in manifest:
+        local_setattr(tgt_obj, attr, (src & mask) >> n)
+
+def upkbitsL(tgt_obj, src, manifest, local_setattr=setattr, local_int=int):
+    for n, mask, attr in manifest:
+        local_setattr(tgt_obj, attr, local_int((src & mask) >> n))
+
+def unpack_string(data, pos, encoding, lenlen=1):
+    nchars = unpack('<' + 'BH'[lenlen-1], data[pos:pos+lenlen])[0]
+    pos += lenlen
+    return str(data[pos:pos+nchars], encoding)
+
+def unpack_string_update_pos(data, pos, encoding, lenlen=1, known_len=None):
+    if known_len is not None:
+        # On a NAME record, the length byte is detached from the front of the string.
+        nchars = known_len
+    else:
+        nchars = unpack('<' + 'BH'[lenlen-1], data[pos:pos+lenlen])[0]
+        pos += lenlen
+
+    newpos = pos + nchars
+    return (str(data[pos:newpos], encoding), newpos)
+
+def unpack_unicode(data, pos, lenlen=2):
+    """ Return unicode_strg """
+    nchars = unpack('<' + 'BH'[lenlen-1], data[pos:pos+lenlen])[0]
+    if not nchars:
+        # Ambiguous whether 0-length string should have an "options" byte.
+        # Avoid crash if missing.
+        return ""
+    pos += lenlen
+    options = data[pos]
+    pos += 1
+
+    if options & 0x08: # richtext
+        pos += 2
+
+    if options & 0x04: # phonetic
+        pos += 4
+
+    if options & 0x01:
+        # Uncompressed UTF-16-LE
+        rawstrg = data[pos:pos+2*nchars]
+        strg = str(rawstrg, 'utf_16_le')
+    else:
+        # Note: this is COMPRESSED (not ASCII!) encoding!!!
+        # Merely returning the raw bytes would work OK 99.99% of the time
+        # if the local codepage was cp1252 -- however this would rapidly go pear-shaped
+        # for other codepages so we grit our Anglocentric teeth and return Unicode :-)
+        strg = str(data[pos:pos+nchars], "latin_1")
+    return strg
+
+def unpack_unicode_update_pos(data, pos, lenlen=2, known_len=None):
+    """ Return (unicode_strg, updated value of pos) """
+    if known_len is not None:
+        # On a NAME record, the length byte is detached from the front of the string.
+        nchars = known_len
+    else:
+        nchars = unpack('<' + 'BH'[lenlen-1], data[pos:pos+lenlen])[0]
+        pos += lenlen
+
+    if not nchars and not data[pos:]:
+        # Zero-length string with no options byte
+        return ("", pos)
+
+    options = data[pos]
+    pos += 1
+    phonetic = options & 0x04
+    richtext = options & 0x08
+
+    if richtext:
+        rt = unpack('<H', data[pos:pos+2])[0]
+        pos += 2
+
+    if phonetic:
+        sz = unpack('<i', data[pos:pos+4])[0]
+        pos += 4
+
+    if options & 0x01:
+        # Uncompressed UTF-16-LE
+        strg = str(data[pos:pos+2*nchars], 'utf_16_le')
+        pos += 2*nchars
+    else:
+        # Note: this is COMPRESSED (not ASCII!) encoding!!!
+        strg = str(data[pos:pos+nchars], "latin_1")
+        pos += nchars
+
+    if richtext:
+        pos += 4 * rt
+
+    if phonetic:
+        pos += sz
+
+    return (strg, pos)
+
+def unpack_cell_range_address_list_update_pos(
+    output_list, data, pos, biff_version, addr_size=6):
+    # output_list is updated in situ
+    if biff_version < 80:
+        assert addr_size == 6
+    else:
+        assert addr_size in (6, 8)
+    n, = unpack("<H", data[pos:pos+2])
+    pos += 2
+    if n:
+        fmt = "<HHBB" if addr_size == 6 else "<HHHH"
+        for _unused in range(n):
+            ra, rb, ca, cb = unpack(fmt, data[pos:pos+addr_size])
+            output_list.append((ra, rb+1, ca, cb+1))
+            pos += addr_size
+    return pos
+
+def hex_char_dump(strg, ofs, dlen, base=0, fout=sys.stdout, unnumbered=False):
+    endpos = min(ofs + dlen, len(strg))
+    pos = ofs
+    numbered = not unnumbered
+    num_prefix = ''
+    while pos < endpos:
+        endsub = min(pos + 16, endpos)
+        substrg = strg[pos:endsub]
+        lensub = endsub - pos
+        if lensub <= 0 or lensub != len(substrg):
+            fprintf(
+                sys.stdout,
+                '??? hex_char_dump: ofs=%d dlen=%d base=%d -> endpos=%d pos=%d endsub=%d substrg=%r\n',
+                ofs, dlen, base, endpos, pos, endsub, substrg)
+            break
+        hexd = ''.join(["%02x " % c for c in substrg])
+        chard = ''
+        for c in substrg:
+            if c == ord('\0'):
+                c = '~'
+            elif not (' ' <= chr(c) <= '~'):
+                c = '?'
+            if isinstance(c, int):
+                c = chr(c)
+            chard += c
+        if numbered:
+            num_prefix = "%5d: " %  (base+pos-ofs)
+        fprintf(fout, "%s     %-48s %s\n", num_prefix, hexd, chard)
+        pos = endsub
+
+def biff_dump(mem, stream_offset, stream_len, base=0, fout=sys.stdout,
+              unnumbered=False):
+    pos = stream_offset
+    stream_end = stream_offset + stream_len
+    adj = base - stream_offset
+    dummies = 0
+    numbered = not unnumbered
+    num_prefix = ''
+    while stream_end - pos >= 4:
+        rc, length = unpack('<HH', mem[pos:pos+4])
+        if rc == 0 and length == 0:
+            if mem[pos:] == '\0' * (stream_end - pos):
+                dummies = stream_end - pos
+                savpos = pos
+                pos = stream_end
+                break
+
+            if dummies:
+                dummies += 4
+            else:
+                savpos = pos
+                dummies = 4
+            pos += 4
+        else:
+            if dummies:
+                if numbered:
+                    num_prefix =  "%5d: " % (adj + savpos)
+                fprintf(fout, "%s---- %d zero bytes skipped ----\n",
+                        num_prefix, dummies)
+                dummies = 0
+
+            recname = biff_rec_name_dict.get(rc, '<UNKNOWN>')
+            if numbered:
+                num_prefix = "%5d: " % (adj + pos)
+            fprintf(fout, "%s%04x %s len = %04x (%d)\n",
+                    num_prefix, rc, recname, length, length)
+            pos += 4
+            hex_char_dump(mem, pos, length, adj+pos, fout, unnumbered)
+            pos += length
+    if dummies:
+        if numbered:
+            num_prefix =  "%5d: " % (adj + savpos)
+        fprintf(fout, "%s---- %d zero bytes skipped ----\n", num_prefix, dummies)
+
+    if pos < stream_end:
+        if numbered:
+            num_prefix = "%5d: " % (adj + pos)
+        fprintf(fout, "%s---- Misc bytes at end ----\n", num_prefix)
+        hex_char_dump(mem, pos, stream_end-pos, adj + pos, fout, unnumbered)
+    elif pos > stream_end:
+        fprintf(fout, "Last dumped record has length (%d) that is too large\n", length)
+
+def biff_count_records(mem, stream_offset, stream_len, fout=sys.stdout):
+    pos = stream_offset
+    stream_end = stream_offset + stream_len
+    tally = {}
+    while stream_end - pos >= 4:
+        rc, length = unpack('<HH', mem[pos:pos+4])
+        if rc == 0 and length == 0:
+            if mem[pos:] == '\0' * (stream_end - pos):
+                break
+            recname = "<Dummy (zero)>"
+        else:
+            recname = biff_rec_name_dict.get(rc, None)
+            if recname is None:
+                recname = "Unknown_0x%04X" % rc
+        if recname in tally:
+            tally[recname] += 1
+        else:
+            tally[recname] = 1
+        pos += length + 4
+    for recname, count in sorted(tally.items()):
+        fprintf(fout, "%8d %s", count, recname)
diff --git a/tablib/packages/xlrd3/compdoc.py b/tablib/packages/xlrd3/compdoc.py
new file mode 100644
index 0000000..c2ce764
--- /dev/null
+++ b/tablib/packages/xlrd3/compdoc.py
@@ -0,0 +1,346 @@
+# Implements the minimal functionality required
+# to extract a "Workbook" or "Book" stream (as one big string)
+# from an OLE2 Compound Document file.
+#
+# Copyright © 2005-2008 Stephen John Machin, Lingfo Pty Ltd
+# This module is part of the xlrd3 package, which is released under a BSD-style licence.
+
+# No part of the content of this file was derived from the works of David Giffin.
+
+# 2008-11-04 SJM Avoid assertion error when -1 used instead of -2 for first_SID of empty SCSS [Frank Hoffsuemmer]
+# 2007-09-08 SJM Warning message if sector sizes are extremely large.
+# 2007-05-07 SJM Meaningful exception instead of IndexError if a SAT (sector allocation table) is corrupted.
+# 2007-04-22 SJM Missing "<" in a struct.unpack call => can't open files on bigendian platforms.
+
+
+import sys
+from struct import unpack
+
+# Magic cookie that should appear in the first 8 bytes of the file.
+SIGNATURE = b"\xD0\xCF\x11\xE0\xA1\xB1\x1A\xE1"
+
+EOCSID = -2
+FREESID = -1
+SATSID = -3
+MSATSID = -4
+
+def int_floor_div(x, y):
+    return divmod(x, y)[0]
+
+class CompDocError(Exception):
+    pass
+
+class DirNode(object):
+
+    def __init__(self, DID, dent, DEBUG=0):
+        # dent is the 128-byte directory entry
+        self.DID = DID
+        # (cbufsize, self.etype, self.colour, self.left_DID, self.right_DID,
+        # self.root_DID,
+        # self.first_SID,
+        # self.tot_size) = \
+        #     unpack('<HBBiii16x4x8x8xii4x', dent[64:128])
+        (cbufsize, self.etype, self.colour, self.left_DID, self.right_DID,
+        self.root_DID) = \
+            unpack('<HBBiii', dent[64:80])
+        (self.first_SID, self.tot_size) = \
+            unpack('<ii', dent[116:124])
+        if cbufsize == 0:
+            self.name = ''
+        else:
+            self.name = str(dent[0:cbufsize-2], 'utf_16_le') # omit the trailing U+0000
+        self.children = [] # filled in later
+        self.parent = -1 # indicates orphan; fixed up later
+        self.tsinfo = unpack('<IIII', dent[100:116])
+        if DEBUG:
+            self.dump(DEBUG)
+
+    def dump(self, DEBUG=1):
+        print("DID=%d name=%r etype=%d DIDs(left=%d right=%d root=%d parent=%d kids=%r) first_SID=%d tot_size=%d" \
+            % (self.DID, self.name, self.etype, self.left_DID,
+            self.right_DID, self.root_DID, self.parent, self.children, self.first_SID, self.tot_size))
+        if DEBUG == 2:
+            # cre_lo, cre_hi, mod_lo, mod_hi = tsinfo
+            print("timestamp info", self.tsinfo)
+
+def _build_family_tree(dirlist, parent_DID, child_DID):
+    if child_DID < 0: return
+    _build_family_tree(dirlist, parent_DID, dirlist[child_DID].left_DID)
+    dirlist[parent_DID].children.append(child_DID)
+    dirlist[child_DID].parent = parent_DID
+    _build_family_tree(dirlist, parent_DID, dirlist[child_DID].right_DID)
+    if dirlist[child_DID].etype == 1: # storage
+        _build_family_tree(dirlist, child_DID, dirlist[child_DID].root_DID)
+
+# Compound document handler.
+# @param mem The raw contents of the file, as a string, or as an mmap.mmap() object. The
+# only operation it needs to support is slicing.
+
+class CompDoc(object):
+
+    def __init__(self, mem, logfile=sys.stdout, DEBUG=0):
+        self.logfile = logfile
+        if mem[0:8] != SIGNATURE:
+            raise CompDocError('Not an OLE2 compound document')
+        if mem[28:30] != b'\xFE\xFF':
+            raise CompDocError('Expected "little-endian" marker, found %r' % mem[28:30])
+        revision, version = unpack('<HH', mem[24:28])
+        if DEBUG:
+            print("\nCompDoc format: version=0x%04x revision=0x%04x" % (version, revision), file=logfile)
+        self.mem = mem
+        ssz, sssz = unpack('<HH', mem[30:34])
+        if ssz > 20: # allows for 2**20 bytes i.e. 1MB
+            print("WARNING: sector size (2**%d) is preposterous; assuming 512 and continuing ..." \
+                % ssz, file=logfile)
+            ssz = 9
+        if sssz > ssz:
+            print("WARNING: short stream sector size (2**%d) is preposterous; assuming 64 and continuing ..." \
+                % sssz, file=logfile)
+            sssz = 6
+        self.sec_size = sec_size = 1 << ssz
+        self.short_sec_size = 1 << sssz
+        (
+            SAT_tot_secs, self.dir_first_sec_sid, _unused, self.min_size_std_stream,
+            SSAT_first_sec_sid, SSAT_tot_secs,
+            MSAT_first_sec_sid, MSAT_tot_secs,
+        # ) = unpack('<ii4xiiiii', mem[44:76])
+        ) = unpack('<iiiiiiii', mem[44:76])
+        mem_data_len = len(mem) - 512
+        mem_data_secs, left_over = divmod(mem_data_len, sec_size)
+        if left_over:
+            #### raise CompDocError("Not a whole number of sectors")
+            print("WARNING *** file size (%d) not 512 + multiple of sector size (%d)" \
+                % (len(mem), sec_size), file=logfile)
+        if DEBUG:
+            print('sec sizes', ssz, sssz, sec_size, self.short_sec_size, file=logfile)
+            print("mem data: %d bytes == %d sectors" % (mem_data_len, mem_data_secs), file=logfile)
+            print("SAT_tot_secs=%d, dir_first_sec_sid=%d, min_size_std_stream=%d" \
+                % (SAT_tot_secs, self.dir_first_sec_sid, self.min_size_std_stream,), file=logfile)
+            print("SSAT_first_sec_sid=%d, SSAT_tot_secs=%d" % (SSAT_first_sec_sid, SSAT_tot_secs,), file=logfile)
+            print("MSAT_first_sec_sid=%d, MSAT_tot_secs=%d" % (MSAT_first_sec_sid, MSAT_tot_secs,), file=logfile)
+        nent = int_floor_div(sec_size, 4) # number of SID entries in a sector
+        fmt = "<%di" % nent
+        trunc_warned = 0
+        #
+        # === build the MSAT ===
+        #
+        MSAT = list(unpack('<109i', mem[76:512]))
+        sid = MSAT_first_sec_sid
+        while sid >= 0:
+            if sid >= mem_data_secs:
+                raise CompDocError(
+                    "MSAT extension: accessing sector %d but only %d in file" % (sid, mem_data_secs)
+                    )
+            offset = 512 + sec_size * sid
+            news = list(unpack(fmt, mem[offset:offset+sec_size]))
+            sid = news.pop()
+            MSAT.extend(news)
+        if DEBUG:
+            print("MSAT: len =", len(MSAT), file=logfile)
+            print(MSAT, file=logfile)
+        #
+        # === build the SAT ===
+        #
+        self.SAT = []
+        for msid in MSAT:
+            if msid == FREESID: continue
+            if msid >= mem_data_secs:
+                if not trunc_warned:
+                    print("WARNING *** File is truncated, or OLE2 MSAT is corrupt!!", file=logfile)
+                    print("INFO: Trying to access sector %d but only %d available" \
+                        % (msid, mem_data_secs), file=logfile)
+                    trunc_warned = 1
+                continue
+            offset = 512 + sec_size * msid
+            news = list(unpack(fmt, mem[offset:offset+sec_size]))
+            self.SAT.extend(news)
+        if DEBUG:
+            print("SAT: len =", len(self.SAT), file=logfile)
+            print(self.SAT, file=logfile)
+            # print >> logfile, "SAT ",
+            # for i, s in enumerate(self.SAT):
+                # print >> logfile, "entry: %4d offset: %6d, next entry: %4d" % (i, 512 + sec_size * i, s)
+                # print >> logfile, "%d:%d " % (i, s),
+            print()
+
+        # === build the directory ===
+        #
+        dbytes = self._get_stream(
+            self.mem, 512, self.SAT, self.sec_size, self.dir_first_sec_sid,
+            name="directory")
+        dirlist = []
+        did = -1
+        for pos in range(0, len(dbytes), 128):
+            did += 1
+            dirlist.append(DirNode(did, dbytes[pos:pos+128], 0))
+        self.dirlist = dirlist
+        _build_family_tree(dirlist, 0, dirlist[0].root_DID) # and stand well back ...
+        if DEBUG:
+            for d in dirlist:
+                d.dump(DEBUG)
+        #
+        # === get the SSCS ===
+        #
+        sscs_dir = self.dirlist[0]
+        assert sscs_dir.etype == 5 # root entry
+        if sscs_dir.first_SID < 0 and sscs_dir.tot_size == 0:
+            # Problem reported by Frank Hoffsuemmer: some software was
+            # writing -1 instead of -2 (EOCSID) for the first_SID
+            # when the SCCS was empty. Not having EOCSID caused assertion
+            # failure in _get_stream.
+            # Solution: avoid calling _get_stream in any case when the
+            # SCSS appears to be empty.
+            self.SSCS = ""
+        else:
+            self.SSCS = self._get_stream(
+                self.mem, 512, self.SAT, sec_size, sscs_dir.first_SID,
+                sscs_dir.tot_size, name="SSCS")
+        # if DEBUG: print >> logfile, "SSCS", repr(self.SSCS)
+        #
+        # === build the SSAT ===
+        #
+        self.SSAT = []
+        if SSAT_tot_secs > 0 and sscs_dir.tot_size == 0:
+            print("WARNING *** OLE2 inconsistency: SSCS size is 0 but SSAT size is non-zero", file=logfile)
+        if sscs_dir.tot_size > 0:
+            sid = SSAT_first_sec_sid
+            nsecs = SSAT_tot_secs
+            while sid >= 0 and nsecs > 0:
+                nsecs -= 1
+                start_pos = 512 + sid * sec_size
+                news = list(unpack(fmt, mem[start_pos:start_pos+sec_size]))
+                self.SSAT.extend(news)
+                sid = self.SAT[sid]
+            # assert SSAT_tot_secs == 0 or sid == EOCSID
+            if DEBUG: print("SSAT last sid %d; remaining sectors %d" % (sid, nsecs), file=logfile)
+            assert nsecs == 0 and sid == EOCSID
+        if DEBUG: print("SSAT", self.SSAT, file=logfile)
+
+    def _get_stream(self, mem, base, sat, sec_size, start_sid, size=None, name=''):
+        # print >> self.logfile, "_get_stream", base, sec_size, start_sid, size
+        sectors = []
+        s = start_sid
+        if size is None:
+            # nothing to check against
+            while s >= 0:
+                start_pos = base + s * sec_size
+                sectors.append(mem[start_pos:start_pos+sec_size])
+                try:
+                    s = sat[s]
+                except IndexError:
+                    raise CompDocError(
+                        "OLE2 stream %r: sector allocation table invalid entry (%d)" %
+                        (name, s)
+                        )
+            assert s == EOCSID
+        else:
+            todo = size
+            while s >= 0:
+                start_pos = base + s * sec_size
+                grab = sec_size
+                if grab > todo:
+                    grab = todo
+                todo -= grab
+                sectors.append(mem[start_pos:start_pos+grab])
+                try:
+                    s = sat[s]
+                except IndexError:
+                    raise CompDocError(
+                        "OLE2 stream %r: sector allocation table invalid entry (%d)" %
+                        (name, s)
+                        )
+            assert s == EOCSID
+            if todo != 0:
+                print("WARNING *** OLE2 stream %r: expected size %d, actual size %d" \
+                    % (name, size, size - todo), file=self.logfile)
+        return b''.join(sectors)
+
+    def _dir_search(self, path, storage_DID=0):
+        # Return matching DirNode instance, or None
+        head = path[0]
+        tail = path[1:]
+        dl = self.dirlist
+        for child in dl[storage_DID].children:
+            if dl[child].name.lower() == head.lower():
+                et = dl[child].etype
+                if et == 2:
+                    return dl[child]
+                if et == 1:
+                    if not tail:
+                        raise CompDocError("Requested component is a 'storage'")
+                    return self._dir_search(tail, child)
+                dl[child].dump(1)
+                raise CompDocError("Requested stream is not a 'user stream'")
+        return None
+
+    ##
+    # Interrogate the compound document's directory; return the stream as a string if found, otherwise
+    # return None.
+    # @param qname Name of the desired stream e.g. u'Workbook'. Should be in Unicode or convertible thereto.
+
+    def get_named_stream(self, qname):
+        d = self._dir_search(qname.split("/"))
+        if d is None:
+            return None
+        if d.tot_size >= self.min_size_std_stream:
+            return self._get_stream(
+                self.mem, 512, self.SAT, self.sec_size, d.first_SID,
+                d.tot_size, name=qname)
+        else:
+            return self._get_stream(
+                self.SSCS, 0, self.SSAT, self.short_sec_size, d.first_SID,
+                d.tot_size, name=qname + " (from SSCS)")
+
+    # Interrogate the compound document's directory.
+    # If the named stream is not found, (None, 0, 0) will be returned.
+    # If the named stream is found and is contiguous within the original byte sequence ("mem")
+    # used when the document was opened,
+    # then (mem, offset_to_start_of_stream, length_of_stream) is returned.
+    # Otherwise a new string is built from the fragments and (new_string, 0, length_of_stream) is returned.
+    # @param qname Name of the desired stream e.g. u'Workbook'. Should be in Unicode or convertible thereto.
+
+    def locate_named_stream(self, qname):
+        d = self._dir_search(qname.split("/"))
+        if d is None:
+            return (None, 0, 0)
+        if d.tot_size >= self.min_size_std_stream:
+            return self._locate_stream(self.mem, 512, self.SAT, self.sec_size, d.first_SID, d.tot_size)
+        else:
+            return (
+                self._get_stream(
+                    self.SSCS, 0, self.SSAT, self.short_sec_size, d.first_SID,
+                    d.tot_size, qname + " (from SSCS)"),
+                0,
+                d.tot_size
+                )
+        return (None, 0, 0) # not found
+
+    def _locate_stream(self, mem, base, sat, sec_size, start_sid, size):
+        # print >> self.logfile, "_locate_stream", base, sec_size, start_sid, size
+        s = start_sid
+        if s < 0:
+            raise CompDocError("_locate_stream: start_sid (%d) is -ve" % start_sid)
+        p = -99 # dummy previous SID
+        start_pos = -9999
+        end_pos = -8888
+        slices = []
+        while s >= 0:
+            if s == p+1:
+                # contiguous sectors
+                end_pos += sec_size
+            else:
+                # start new slice
+                if p >= 0:
+                    # not first time
+                    slices.append((start_pos, end_pos))
+                start_pos = base + s * sec_size
+                end_pos = start_pos + sec_size
+            p = s
+            s = sat[s]
+        assert s == EOCSID
+        # print >> self.logfile, len(slices) + 1, "slices"
+        if not slices:
+            # The stream is contiguous ... just what we like!
+            return (mem, start_pos, size)
+        slices.append((start_pos, end_pos))
+        return (b''.join([mem[start_pos:end_pos] for start_pos, end_pos in slices]), 0, size)
diff --git a/tablib/packages/xlrd3/formatting.py b/tablib/packages/xlrd3/formatting.py
new file mode 100644
index 0000000..85484da
--- /dev/null
+++ b/tablib/packages/xlrd3/formatting.py
@@ -0,0 +1,1186 @@
+# Module for formatting information.
+#
+# Copyright © 2005-2008 Stephen John Machin, Lingfo Pty Ltd
+# Copyright © 2005-2009 Stephen John Machin, Lingfo Pty Ltd
+# This module is part of the xlrd3 package, which is released under
+# a BSD-style licence.
+
+# No part of the content of this file was derived from the works of David Giffin.
+
+# 2009-05-31 SJM Fixed problem with non-zero reserved bits in some STYLE records in Mac Excel files
+# 2008-08-03 SJM Ignore PALETTE record when Book.formatting_info is false
+# 2008-08-03 SJM Tolerate up to 4 bytes trailing junk on PALETTE record
+# 2008-05-10 SJM Do some XF checks only when Book.formatting_info is true
+# 2008-02-08 SJM Preparation for Excel 2.0 support
+# 2008-02-03 SJM Another tweak to is_date_format_string()
+# 2007-12-04 SJM Added support for Excel 2.x (BIFF2) files.
+# 2007-10-13 SJM Warning: style XF whose parent XF index != 0xFFF
+# 2007-09-08 SJM Work around corrupt STYLE record
+# 2007-07-11 SJM Allow for BIFF2/3-style FORMAT record in BIFF4/8 file
+
+DEBUG = False
+import copy
+import re
+from struct import unpack
+
+from .biffh import BaseObject, unpack_unicode, unpack_string, \
+    upkbits, upkbitsL, fprintf, \
+    FUN, FDT, FNU, FGE, FTX, XL_CELL_NUMBER, XL_CELL_DATE, \
+    XL_FORMAT, XL_FORMAT2, \
+    XLRDError
+
+
+excel_default_palette_b5 = (
+    (  0,   0,   0), (255, 255, 255), (255,   0,   0), (  0, 255,   0),
+    (  0,   0, 255), (255, 255,   0), (255,   0, 255), (  0, 255, 255),
+    (128,   0,   0), (  0, 128,   0), (  0,   0, 128), (128, 128,   0),
+    (128,   0, 128), (  0, 128, 128), (192, 192, 192), (128, 128, 128),
+    (153, 153, 255), (153,  51, 102), (255, 255, 204), (204, 255, 255),
+    (102,   0, 102), (255, 128, 128), (  0, 102, 204), (204, 204, 255),
+    (  0,   0, 128), (255,   0, 255), (255, 255,   0), (  0, 255, 255),
+    (128,   0, 128), (128,   0,   0), (  0, 128, 128), (  0,   0, 255),
+    (  0, 204, 255), (204, 255, 255), (204, 255, 204), (255, 255, 153),
+    (153, 204, 255), (255, 153, 204), (204, 153, 255), (227, 227, 227),
+    ( 51, 102, 255), ( 51, 204, 204), (153, 204,   0), (255, 204,   0),
+    (255, 153,   0), (255, 102,   0), (102, 102, 153), (150, 150, 150),
+    (  0,  51, 102), ( 51, 153, 102), (  0,  51,   0), ( 51,  51,   0),
+    (153,  51,   0), (153,  51, 102), ( 51,  51, 153), ( 51,  51,  51),
+    )
+
+excel_default_palette_b2 = excel_default_palette_b5[:16]
+
+# Following two tables borrowed from Gnumeric 1.4 source.
+excel_default_palette_b5_gnumeric_14 = (
+    #### dodgy; didn't match Excel results
+    (  0,  0,  0), (255,255,255), (255,  0,  0), (  0,255,  0),
+    (  0,  0,255), (255,255,  0), (255,  0,255), (  0,255,255),
+    (128,  0,  0), (  0,128,  0), (  0,  0,128), (128,128,  0),
+    (128,  0,128), (  0,128,128), (192,192,192), (128,128,128),
+    (128,128,255), (128, 32, 96), (255,255,192), (160,224,224),
+    ( 96,  0,128), (255,128,128), (  0,128,192), (192,192,255),
+    (  0,  0,128), (255,  0,255), (255,255,  0), (  0,255,255),
+    (128,  0,128), (128,  0,  0), (  0,128,128), (  0,  0,255),
+    (  0,204,255), (105,255,255), (204,255,204), (255,255,153),
+    (166,202,240), (204,156,204), (204,153,255), (227,227,227),
+    ( 51,102,255), ( 51,204,204), ( 51,153, 51), (153,153, 51),
+    (153,102, 51), (153,102,102), (102,102,153), (150,150,150),
+    ( 51, 51,204), ( 51,102,102), (  0, 51,  0), ( 51, 51,  0),
+    (102, 51,  0), (153, 51,102), ( 51, 51,153), ( 66, 66, 66),
+    )
+excel_default_palette_b8 = ( # (red, green, blue)
+    (  0,  0,  0), (255,255,255), (255,  0,  0), (  0,255,  0),
+    (  0,  0,255), (255,255,  0), (255,  0,255), (  0,255,255),
+    (128,  0,  0), (  0,128,  0), (  0,  0,128), (128,128,  0),
+    (128,  0,128), (  0,128,128), (192,192,192), (128,128,128),
+    (153,153,255), (153, 51,102), (255,255,204), (204,255,255),
+    (102,  0,102), (255,128,128), (  0,102,204), (204,204,255),
+    (  0,  0,128), (255,  0,255), (255,255,  0), (  0,255,255),
+    (128,  0,128), (128,  0,  0), (  0,128,128), (  0,  0,255),
+    (  0,204,255), (204,255,255), (204,255,204), (255,255,153),
+    (153,204,255), (255,153,204), (204,153,255), (255,204,153),
+    ( 51,102,255), ( 51,204,204), (153,204,  0), (255,204,  0),
+    (255,153,  0), (255,102,  0), (102,102,153), (150,150,150),
+    (  0, 51,102), ( 51,153,102), (  0, 51,  0), ( 51, 51,  0),
+    (153, 51,  0), (153, 51,102), ( 51, 51,153), ( 51, 51, 51),
+    )
+
+default_palette = {
+    80: excel_default_palette_b8,
+    70: excel_default_palette_b5,
+    50: excel_default_palette_b5,
+    45: excel_default_palette_b2,
+    40: excel_default_palette_b2,
+    30: excel_default_palette_b2,
+    21: excel_default_palette_b2,
+    20: excel_default_palette_b2,
+    }
+
+"""
+00H = Normal
+01H = RowLevel_lv (see next field)
+02H = ColLevel_lv (see next field)
+03H = Comma
+04H = Currency
+05H = Percent
+06H = Comma [0] (BIFF4-BIFF8)
+07H = Currency [0] (BIFF4-BIFF8)
+08H = Hyperlink (BIFF8)
+09H = Followed Hyperlink (BIFF8)
+"""
+built_in_style_names = [
+    "Normal",
+    "RowLevel_",
+    "ColLevel_",
+    "Comma",
+    "Currency",
+    "Percent",
+    "Comma [0]",
+    "Currency [0]",
+    "Hyperlink",
+    "Followed Hyperlink",
+    ]
+
+def initialise_colour_map(book):
+    book.colour_map = {}
+    book.colour_indexes_used = {}
+    if not book.formatting_info:
+        return
+    # Add the 8 invariant colours
+    for i in range(8):
+        book.colour_map[i] = excel_default_palette_b8[i]
+    # Add the default palette depending on the version
+    dpal = default_palette[book.biff_version]
+    ndpal = len(dpal)
+    for i in range(ndpal):
+        book.colour_map[i+8] = dpal[i]
+    # Add the specials -- None means the RGB value is not known
+    # System window text colour for border lines
+    book.colour_map[ndpal+8] = None
+    # System window background colour for pattern background
+    book.colour_map[ndpal+8+1] = None #
+    for ci in (
+        0x51, # System ToolTip text colour (used in note objects)
+        0x7FFF, # 32767, system window text colour for fonts
+        ):
+        book.colour_map[ci] = None
+
+def nearest_colour_index(colour_map, rgb, debug=0):
+    # General purpose function. Uses Euclidean distance.
+    # So far used only for pre-BIFF8 WINDOW2 record.
+    # Doesn't have to be fast.
+    # Doesn't have to be fancy.
+    best_metric = 3 * 256 * 256
+    best_colourx = 0
+    for colourx, cand_rgb in list(colour_map.items()):
+        if cand_rgb is None:
+            continue
+        metric = 0
+        for v1, v2 in zip(rgb, cand_rgb):
+            metric += (v1 - v2) * (v1 - v2)
+        if metric < best_metric:
+            best_metric = metric
+            best_colourx = colourx
+            if metric == 0:
+                break
+    if debug:
+        print("nearest_colour_index for %r is %r -> %r; best_metric is %d" \
+            % (rgb, best_colourx, colour_map[best_colourx], best_metric))
+    return best_colourx
+
+# This mixin class exists solely so that Format, Font, and XF.... objects
+# can be compared by value of their attributes.
+class EqNeAttrs(object):
+
+    def __eq__(self, other):
+        return self.__dict__ == other.__dict__
+
+    def __ne__(self, other):
+        return self.__dict__ != other.__dict__
+
+# An Excel "font" contains the details of not only what is normally
+# considered a font, but also several other display attributes.
+# Items correspond to those in the Excel UI's Format/Cells/Font tab.
+# - New in version 0.6.1
+class Font(BaseObject, EqNeAttrs):
+    # 1 = Characters are bold. Redundant; see "weight" attribute.
+    bold = 0
+
+    # Values: 0 = ANSI Latin, 1 = System default, 2 = Symbol,
+    # 77 = Apple Roman,
+    # 128 = ANSI Japanese Shift-JIS,
+    # 129 = ANSI Korean (Hangul),
+    # 130 = ANSI Korean (Johab),
+    # 134 = ANSI Chinese Simplified GBK,
+    # 136 = ANSI Chinese Traditional BIG5,
+    # 161 = ANSI Greek,
+    # 162 = ANSI Turkish,
+    # 163 = ANSI Vietnamese,
+    # 177 = ANSI Hebrew,
+    # 178 = ANSI Arabic,
+    # 186 = ANSI Baltic,
+    # 204 = ANSI Cyrillic,
+    # 222 = ANSI Thai,
+    # 238 = ANSI Latin II (Central European),
+    # 255 = OEM Latin I
+    character_set = 0
+    # An explanation of "colour index" is given in the Formatting
+    # section at the start of this document.
+    colour_index = 0
+    # 1 = Superscript, 2 = Subscript.
+    escapement = 0
+    # 0 = None (unknown or don't care)<br />
+    # 1 = Roman (variable width, serifed)<br />
+    # 2 = Swiss (variable width, sans-serifed)<br />
+    # 3 = Modern (fixed width, serifed or sans-serifed)<br />
+    # 4 = Script (cursive)<br />
+    # 5 = Decorative (specialised, for example Old English, Fraktur)
+    family = 0
+    # The 0-based index used to refer to this Font() instance.
+    # Note that index 4 is never used; xlrd supplies a dummy place-holder.
+    font_index = 0
+    # Height of the font (in twips). A twip = 1/20 of a point.
+    height = 0
+    # 1 = Characters are italic.
+    italic = 0
+    # The name of the font. Example: u"Arial"
+    name = ""
+    # 1 = Characters are struck out.
+    struck_out = 0
+    # 0 = None<br />
+    # 1 = Single;  0x21 (33) = Single accounting<br />
+    # 2 = Double;  0x22 (34) = Double accounting
+    underline_type = 0
+    # 1 = Characters are underlined. Redundant; see "underline_type" attribute.
+    underlined = 0
+    # Font weight (100-1000). Standard values are 400 for normal text
+    # and 700 for bold text.
+    weight = 400
+    # 1 = Font is outline style (Macintosh only)
+    outline = 0
+    # 1 = Font is shadow style (Macintosh only)
+    shadow = 0
+
+    # No methods ...
+
+def handle_efont(book, data): # BIFF2 only
+    if not book.formatting_info:
+        return
+    book.font_list[-1].colour_index = unpack('<H', data)[0]
+
+def handle_font(book, data):
+    if not book.formatting_info:
+        return
+    if not book.encoding:
+        book.derive_encoding()
+    verbose = DEBUG or book.verbosity >= 2
+    bv = book.biff_version
+    k = len(book.font_list)
+    if k == 4:
+        f = Font()
+        f.name = 'Dummy Font'
+        f.font_index = k
+        book.font_list.append(f)
+        k += 1
+    f = Font()
+    f.font_index = k
+    book.font_list.append(f)
+    if bv >= 50:
+        (
+            f.height, option_flags, f.colour_index, f.weight,
+            f.escapement_type, f.underline_type, f.family,
+            f.character_set,
+        ) = unpack('<HHHHHBBB', data[0:13])
+        f.bold = option_flags & 1
+        f.italic = (option_flags & 2) >> 1
+        f.underlined = (option_flags & 4) >> 2
+        f.struck_out = (option_flags & 8) >> 3
+        f.outline = (option_flags & 16) >> 4
+        f.shadow = (option_flags & 32) >> 5
+        if bv >= 80:
+            f.name = unpack_unicode(data, 14, lenlen=1)
+        else:
+            f.name = unpack_string(data, 14, book.encoding, lenlen=1)
+    elif bv >= 30:
+        f.height, option_flags, f.colour_index = unpack('<HHH', data[0:6])
+        f.bold = option_flags & 1
+        f.italic = (option_flags & 2) >> 1
+        f.underlined = (option_flags & 4) >> 2
+        f.struck_out = (option_flags & 8) >> 3
+        f.outline = (option_flags & 16) >> 4
+        f.shadow = (option_flags & 32) >> 5
+        f.name = unpack_string(data, 6, book.encoding, lenlen=1)
+        # Now cook up the remaining attributes ...
+        f.weight = [400, 700][f.bold]
+        f.escapement_type = 0 # None
+        f.underline_type = f.underlined # None or Single
+        f.family = 0 # Unknown / don't care
+        f.character_set = 1 # System default (0 means "ANSI Latin")
+    else: # BIFF2
+        f.height, option_flags = unpack('<HH', data[0:4])
+        f.colour_index = 0x7FFF # "system window text colour"
+        f.bold = option_flags & 1
+        f.italic = (option_flags & 2) >> 1
+        f.underlined = (option_flags & 4) >> 2
+        f.struck_out = (option_flags & 8) >> 3
+        f.outline = 0
+        f.shadow = 0
+        f.name = unpack_string(data, 4, book.encoding, lenlen=1)
+        # Now cook up the remaining attributes ...
+        f.weight = [400, 700][f.bold]
+        f.escapement_type = 0 # None
+        f.underline_type = f.underlined # None or Single
+        f.family = 0 # Unknown / don't care
+        f.character_set = 1 # System default (0 means "ANSI Latin")
+    if verbose:
+        f.dump(
+            book.logfile,
+            header="--- handle_font: font[%d] ---" % f.font_index,
+            footer="-------------------",
+            )
+
+# === "Number formats" ===
+
+# "Number format" information from a FORMAT record.
+# - New in version 0.6.1
+class Format(BaseObject, EqNeAttrs):
+
+    # The key into Book.format_map
+    format_key = 0
+
+    # A classification that has been inferred from the format string.
+    # Currently, this is used only to distinguish between numbers and dates.
+    # Values:
+    # FUN = 0 # unknown
+    # FDT = 1 # date
+    # FNU = 2 # number
+    # FGE = 3 # general
+    # FTX = 4 # text
+    type = FUN
+
+    # The format string
+    format_str = ''
+
+    def __init__(self, format_key, ty, format_str):
+        self.format_key = format_key
+        self.type = ty
+        self.format_str = format_str
+
+std_format_strings = {
+    # "std" == "standard for US English locale"
+    # #### TODO ... a lot of work to tailor these to the user's locale.
+    # See e.g. gnumeric-1.x.y/src/formats.c
+    0x00: "General",
+    0x01: "0",
+    0x02: "0.00",
+    0x03: "#,##0",
+    0x04: "#,##0.00",
+    0x05: "$#,##0_);($#,##0)",
+    0x06: "$#,##0_);[Red]($#,##0)",
+    0x07: "$#,##0.00_);($#,##0.00)",
+    0x08: "$#,##0.00_);[Red]($#,##0.00)",
+    0x09: "0%",
+    0x0a: "0.00%",
+    0x0b: "0.00E+00",
+    0x0c: "# ?/?",
+    0x0d: "# ??/??",
+    0x0e: "m/d/yy",
+    0x0f: "d-mmm-yy",
+    0x10: "d-mmm",
+    0x11: "mmm-yy",
+    0x12: "h:mm AM/PM",
+    0x13: "h:mm:ss AM/PM",
+    0x14: "h:mm",
+    0x15: "h:mm:ss",
+    0x16: "m/d/yy h:mm",
+    0x25: "#,##0_);(#,##0)",
+    0x26: "#,##0_);[Red](#,##0)",
+    0x27: "#,##0.00_);(#,##0.00)",
+    0x28: "#,##0.00_);[Red](#,##0.00)",
+    0x29: "_(* #,##0_);_(* (#,##0);_(* \"-\"_);_(@_)",
+    0x2a: "_($* #,##0_);_($* (#,##0);_($* \"-\"_);_(@_)",
+    0x2b: "_(* #,##0.00_);_(* (#,##0.00);_(* \"-\"??_);_(@_)",
+    0x2c: "_($* #,##0.00_);_($* (#,##0.00);_($* \"-\"??_);_(@_)",
+    0x2d: "mm:ss",
+    0x2e: "[h]:mm:ss",
+    0x2f: "mm:ss.0",
+    0x30: "##0.0E+0",
+    0x31: "@",
+    }
+
+fmt_code_ranges = [ # both-inclusive ranges of "standard" format codes
+    # Source: the openoffice.org doc't
+    ( 0,  0, FGE),
+    ( 1, 13, FNU),
+    (14, 22, FDT),
+    #### (27, 36, FDT), # Japanese dates -- not sure of reliability of this
+    (37, 44, FNU),
+    (45, 47, FDT),
+    (48, 48, FNU),
+    (49, 49, FTX),
+    ####(50, 58, FDT), # Japanese dates -- but Gnumeric assumes
+                       # built-in formats finish at 49, not at 163
+    ]
+
+std_format_code_types = {}
+for lo, hi, ty in fmt_code_ranges:
+    for x in range(lo, hi+1):
+        std_format_code_types[x] = ty
+del lo, hi, ty, x
+
+date_chars = 'ymdhs' # year, month/minute, day, hour, second
+date_char_dict = {}
+for _c in date_chars + date_chars.upper():
+    date_char_dict[_c] = 5
+del _c, date_chars
+
+#(to_py3):
+skip_char_dict = frozenset('$-+/(): ')
+
+num_char_dict = {
+    '0': 5,
+    '#': 5,
+    '?': 5,
+    }
+
+non_date_formats = {
+    '0.00E+00':1,
+    '##0.0E+0':1,
+    'General' :1,
+    'GENERAL' :1, # OOo Calc 1.1.4 does this.
+    'general' :1,  # pyExcelerator 0.6.3 does this.
+    '@'       :1,
+    }
+
+fmt_bracketed_sub = re.compile(r'\[[^]]*\]').sub
+
+# Boolean format strings (actual cases)
+# u'"Yes";"Yes";"No"'
+# u'"True";"True";"False"'
+# u'"On";"On";"Off"'
+
+def is_date_format_string(book, fmt):
+    # Heuristics:
+    # Ignore "text" and [stuff in square brackets (aarrgghh -- see below)].
+    # Handle backslashed-escaped chars properly.
+    # E.g. hh\hmm\mss\s should produce a display like 23h59m59s
+    # Date formats have one or more of ymdhs (caseless) in them.
+    # Numeric formats have # and 0.
+    # N.B. u'General"."' hence get rid of "text" first.
+    # TODO: Find where formats are interpreted in Gnumeric
+    # TODO: u'[h]\\ \\h\\o\\u\\r\\s' ([h] means don't care about hours > 23)
+    state = 0
+    s = ''
+    # (to_py3): ignorable = skip_char_dict.has_key
+    for c in fmt:
+        if state == 0:
+            if c == '"':
+                state = 1
+            elif c in r"\_*":
+                state = 2
+            elif c in skip_char_dict: # (to_py3):
+                pass
+            else:
+                s += c
+        elif state == 1:
+            if c == '"':
+                state = 0
+        elif state == 2:
+            # Ignore char after backslash, underscore or asterisk
+            state = 0
+        assert 0 <= state <= 2
+    if book.verbosity >= 4:
+        print("is_date_format_string: reduced format is %r" % s)
+    s = fmt_bracketed_sub('', s)
+    if s in non_date_formats:
+        return False
+    state = 0
+    separator = ";"
+    got_sep = 0
+    date_count = num_count = 0
+    for c in s:
+        if c in date_char_dict:
+            date_count += date_char_dict[c]
+        elif c in num_char_dict:
+            num_count += num_char_dict[c]
+        elif c == separator:
+            got_sep = 1
+    # print num_count, date_count, repr(fmt)
+    if date_count and not num_count:
+        return True
+    if num_count and not date_count:
+        return False
+    if date_count:
+        fprintf(book.logfile,
+            'WARNING *** is_date_format: ambiguous d=%d n=%d fmt=%r\n',
+            date_count, num_count, fmt)
+    elif not got_sep:
+        fprintf(book.logfile,
+            "WARNING *** format %r produces constant result\n",
+            fmt)
+    return date_count > num_count
+
+def handle_format(self, data, rectype=XL_FORMAT):
+    DEBUG = 0
+    bv = self.biff_version
+    if rectype == XL_FORMAT2:
+        bv = min(bv, 30)
+    if not self.encoding:
+        self.derive_encoding()
+    strpos = 2
+    if bv >= 50:
+        fmtkey = unpack('<H', data[0:2])[0]
+    else:
+        fmtkey = self.actualfmtcount
+        if bv <= 30:
+            strpos = 0
+    self.actualfmtcount += 1
+    if bv >= 80:
+        unistrg = unpack_unicode(data, 2)
+    else:
+        unistrg = unpack_string(data, strpos, self.encoding, lenlen=1)
+    verbose = DEBUG or self.verbosity >= 3
+    if verbose:
+        fprintf(self.logfile,
+            "FORMAT: count=%d fmtkey=0x%04x (%d) s=%r\n",
+            self.actualfmtcount, fmtkey, fmtkey, unistrg)
+    is_date_s = self.is_date_format_string(unistrg)
+    ty = [FGE, FDT][is_date_s]
+    if not(fmtkey > 163 or bv < 50):
+        # user_defined if fmtkey > 163
+        # N.B. Gnumeric incorrectly starts these at 50 instead of 164 :-(
+        # if earlier than BIFF 5, standard info is useless
+        std_ty = std_format_code_types.get(fmtkey, FUN)
+        # print "std ty", std_ty
+        is_date_c = std_ty == FDT
+        if 0 < fmtkey < 50 and (is_date_c ^ is_date_s):
+            DEBUG = 2
+            fprintf(self.logfile,
+                "WARNING *** Conflict between "
+                "std format key %d and its format string %r\n",
+                fmtkey, unistrg)
+    if DEBUG == 2:
+        fprintf(self.logfile,
+            "ty: %d; is_date_c: %r; is_date_s: %r; fmt_strg: %r",
+            ty, is_date_c, is_date_s, unistrg)
+    fmtobj = Format(fmtkey, ty, unistrg)
+    if verbose:
+        fmtobj.dump(self.logfile,
+            header="--- handle_format [%d] ---" % (self.actualfmtcount-1, ))
+    self.format_map[fmtkey] = fmtobj
+    self.format_list.append(fmtobj)
+
+# =============================================================================
+
+def handle_palette(book, data):
+    if not book.formatting_info:
+        return
+    verbose = DEBUG or book.verbosity >= 2
+    n_colours, = unpack('<H', data[:2])
+    expected_n_colours = (16, 56)[book.biff_version >= 50]
+    if ((DEBUG or book.verbosity >= 1)
+    and n_colours != expected_n_colours):
+        fprintf(book.logfile,
+            "NOTE *** Expected %d colours in PALETTE record, found %d\n",
+            expected_n_colours, n_colours)
+    elif verbose:
+        fprintf(book.logfile,
+            "PALETTE record with %d colours\n", n_colours)
+    fmt = '<xx%di' % n_colours # use i to avoid long integers
+    expected_size = 4 * n_colours + 2
+    actual_size = len(data)
+    tolerance = 4
+    if not expected_size <= actual_size <= expected_size + tolerance:
+        raise XLRDError('PALETTE record: expected size %d, actual size %d' % (expected_size, actual_size))
+    colours = unpack(fmt, data[:expected_size])
+    assert book.palette_record == [] # There should be only 1 PALETTE record
+    # a colour will be 0xbbggrr
+    # IOW, red is at the little end
+    for i in range(n_colours):
+        c = colours[i]
+        red   =  c        & 0xff
+        green = (c >>  8) & 0xff
+        blue  = (c >> 16) & 0xff
+        old_rgb = book.colour_map[8+i]
+        new_rgb = (red, green, blue)
+        book.palette_record.append(new_rgb)
+        book.colour_map[8+i] = new_rgb
+        if verbose:
+            if new_rgb != old_rgb:
+                print("%2d: %r -> %r" % (i, old_rgb, new_rgb), file=book.logfile)
+
+def palette_epilogue(book):
+    # Check colour indexes in fonts etc.
+    # This must be done here as FONT records
+    # come *before* the PALETTE record :-(
+    for font in book.font_list:
+        if font.font_index == 4: # the missing font record
+            continue
+        cx = font.colour_index
+        if cx == 0x7fff: # system window text colour
+            continue
+        if cx in book.colour_map:
+            book.colour_indexes_used[cx] = 1
+        else:
+            print("Size of colour table:", len(book.colour_map))
+            print("*** Font #%d (%r): colour index 0x%04x is unknown" \
+                % (font.font_index, font.name, cx), file=book.logfile)
+    if book.verbosity >= 1:
+        used = list(book.colour_indexes_used.keys())
+        used.sort()
+        print("\nColour indexes used:\n%r\n" % used, file=book.logfile)
+
+def handle_style(book, data):
+    verbose = DEBUG or book.verbosity >= 2
+    bv = book.biff_version
+    flag_and_xfx, built_in_id, level = unpack('<HBB', data[:4])
+    xf_index = flag_and_xfx & 0x0fff
+    if (data == "\0\0\0\0"
+    and "Normal" not in book.style_name_map):
+        # Erroneous record (doesn't have built-in bit set).
+        # Example file supplied by Jeff Bell.
+        built_in = 1
+        built_in_id = 0
+        xf_index = 0
+        name = "Normal"
+        level = 255
+    elif flag_and_xfx & 0x8000:
+        # built-in style
+        built_in = 1
+        name = built_in_style_names[built_in_id]
+        if 1 <= built_in_id <= 2:
+            name += str(level + 1)
+    else:
+        # user-defined style
+        if bv >= 80:
+            name = unpack_unicode(data, 2, lenlen=2)
+        else:
+            name = unpack_string(data, 2, book.encoding, lenlen=1)
+        if verbose and not name:
+            print("WARNING *** A user-defined style has a zero-length name", file=book.logfile)
+        built_in = 0
+        built_in_id = 0
+        level = 0
+    book.style_name_map[name] = (built_in, xf_index)
+    if verbose:
+        print("STYLE: built_in=%d xf_index=%d built_in_id=%d level=%d name=%r" \
+            % (built_in, xf_index, built_in_id, level, name), file=book.logfile)
+
+def check_colour_indexes_in_obj(book, obj, orig_index):
+    alist = list(obj.__dict__.items())
+    alist.sort()
+    for attr, nobj in alist:
+        if hasattr(nobj, 'dump'):
+            check_colour_indexes_in_obj(book, nobj, orig_index)
+        elif attr.find('colour_index') >= 0:
+            if nobj in book.colour_map:
+                book.colour_indexes_used[nobj] = 1
+                continue
+            oname = obj.__class__.__name__
+            print("*** xf #%d : %s.%s =  0x%04x (unknown)" \
+                % (orig_index, oname, attr, nobj), file=book.logfile)
+
+def handle_xf(self, data):
+    ### self is a Book instance
+    # DEBUG = 0
+    verbose = DEBUG or self.verbosity >= 3
+    bv = self.biff_version
+    xf = XF()
+    xf.alignment = XFAlignment()
+    xf.alignment.indent_level = 0
+    xf.alignment.shrink_to_fit = 0
+    xf.alignment.text_direction = 0
+    xf.border = XFBorder()
+    xf.border.diag_up = 0
+    xf.border.diag_down = 0
+    xf.border.diag_colour_index = 0
+    xf.border.diag_line_style = 0 # no line
+    xf.background = XFBackground()
+    xf.protection = XFProtection()
+    # fill in the known standard formats
+    if bv >= 50 and not self.xfcount:
+        # i.e. do this once before we process the first XF record
+        for x in list(std_format_code_types.keys()):
+            if x not in self.format_map:
+                ty = std_format_code_types[x]
+                fmt_str = std_format_strings[x]
+                fmtobj = Format(x, ty, fmt_str)
+                self.format_map[x] = fmtobj
+    if bv >= 80:
+        unpack_fmt = '<HHHBBBBIiH'
+        (xf.font_index, xf.format_key, pkd_type_par,
+        pkd_align1, xf.alignment.rotation, pkd_align2,
+        pkd_used, pkd_brdbkg1, pkd_brdbkg2, pkd_brdbkg3,
+        ) = unpack(unpack_fmt, data[0:20])
+        upkbits(xf.protection, pkd_type_par, (
+            (0, 0x01, 'cell_locked'),
+            (1, 0x02, 'formula_hidden'),
+            ))
+        upkbits(xf, pkd_type_par, (
+            (2, 0x0004, 'is_style'),
+            # Following is not in OOo docs, but is mentioned
+            # in Gnumeric source and also in (deep breath)
+            # org.apache.poi.hssf.record.ExtendedFormatRecord.java
+            (3, 0x0008, 'lotus_123_prefix'), # Meaning is not known.
+            (4, 0xFFF0, 'parent_style_index'),
+            ))
+        upkbits(xf.alignment, pkd_align1, (
+            (0, 0x07, 'hor_align'),
+            (3, 0x08, 'text_wrapped'),
+            (4, 0x70, 'vert_align'),
+            ))
+        upkbits(xf.alignment, pkd_align2, (
+            (0, 0x0f, 'indent_level'),
+            (4, 0x10, 'shrink_to_fit'),
+            (6, 0xC0, 'text_direction'),
+            ))
+        reg = pkd_used >> 2
+        for attr_stem in \
+            "format font alignment border background protection".split():
+            attr = "_" + attr_stem + "_flag"
+            setattr(xf, attr, reg & 1)
+            reg >>= 1
+        upkbitsL(xf.border, pkd_brdbkg1, (
+            (0,  0x0000000f,  'left_line_style'),
+            (4,  0x000000f0,  'right_line_style'),
+            (8,  0x00000f00,  'top_line_style'),
+            (12, 0x0000f000,  'bottom_line_style'),
+            (16, 0x007f0000,  'left_colour_index'),
+            (23, 0x3f800000,  'right_colour_index'),
+            (30, 0x40000000,  'diag_down'),
+            (31, 0x80000000, 'diag_up'),
+            ))
+        upkbits(xf.border, pkd_brdbkg2, (
+            (0,  0x0000007F, 'top_colour_index'),
+            (7,  0x00003F80, 'bottom_colour_index'),
+            (14, 0x001FC000, 'diag_colour_index'),
+            (21, 0x01E00000, 'diag_line_style'),
+            ))
+        upkbitsL(xf.background, pkd_brdbkg2, (
+            (26, 0xFC000000, 'fill_pattern'),
+            ))
+        upkbits(xf.background, pkd_brdbkg3, (
+            (0, 0x007F, 'pattern_colour_index'),
+            (7, 0x3F80, 'background_colour_index'),
+            ))
+    elif bv >= 50:
+        unpack_fmt = '<HHHBBIi'
+        (xf.font_index, xf.format_key, pkd_type_par,
+        pkd_align1, pkd_orient_used,
+        pkd_brdbkg1, pkd_brdbkg2,
+        ) = unpack(unpack_fmt, data[0:16])
+        upkbits(xf.protection, pkd_type_par, (
+            (0, 0x01, 'cell_locked'),
+            (1, 0x02, 'formula_hidden'),
+            ))
+        upkbits(xf, pkd_type_par, (
+            (2, 0x0004, 'is_style'),
+            (3, 0x0008, 'lotus_123_prefix'), # Meaning is not known.
+            (4, 0xFFF0, 'parent_style_index'),
+            ))
+        upkbits(xf.alignment, pkd_align1, (
+            (0, 0x07, 'hor_align'),
+            (3, 0x08, 'text_wrapped'),
+            (4, 0x70, 'vert_align'),
+            ))
+        orientation = pkd_orient_used & 0x03
+        xf.alignment.rotation = [0, 255, 90, 180][orientation]
+        reg = pkd_orient_used >> 2
+        for attr_stem in \
+            "format font alignment border background protection".split():
+            attr = "_" + attr_stem + "_flag"
+            setattr(xf, attr, reg & 1)
+            reg >>= 1
+        upkbitsL(xf.background, pkd_brdbkg1, (
+            ( 0, 0x0000007F, 'pattern_colour_index'),
+            ( 7, 0x00003F80, 'background_colour_index'),
+            (16, 0x003F0000, 'fill_pattern'),
+            ))
+        upkbitsL(xf.border, pkd_brdbkg1, (
+            (22, 0x01C00000,  'bottom_line_style'),
+            (25, 0xFE000000, 'bottom_colour_index'),
+            ))
+        upkbits(xf.border, pkd_brdbkg2, (
+            ( 0, 0x00000007, 'top_line_style'),
+            ( 3, 0x00000038, 'left_line_style'),
+            ( 6, 0x000001C0, 'right_line_style'),
+            ( 9, 0x0000FE00, 'top_colour_index'),
+            (16, 0x007F0000, 'left_colour_index'),
+            (23, 0x3F800000, 'right_colour_index'),
+            ))
+    elif bv >= 40:
+        unpack_fmt = '<BBHBBHI'
+        (xf.font_index, xf.format_key, pkd_type_par,
+        pkd_align_orient, pkd_used,
+        pkd_bkg_34, pkd_brd_34,
+        ) = unpack(unpack_fmt, data[0:12])
+        upkbits(xf.protection, pkd_type_par, (
+            (0, 0x01, 'cell_locked'),
+            (1, 0x02, 'formula_hidden'),
+            ))
+        upkbits(xf, pkd_type_par, (
+            (2, 0x0004, 'is_style'),
+            (3, 0x0008, 'lotus_123_prefix'), # Meaning is not known.
+            (4, 0xFFF0, 'parent_style_index'),
+            ))
+        upkbits(xf.alignment, pkd_align_orient, (
+            (0, 0x07, 'hor_align'),
+            (3, 0x08, 'text_wrapped'),
+            (4, 0x30, 'vert_align'),
+            ))
+        orientation = (pkd_align_orient & 0xC0) >> 6
+        xf.alignment.rotation = [0, 255, 90, 180][orientation]
+        reg = pkd_used >> 2
+        for attr_stem in \
+            "format font alignment border background protection".split():
+            attr = "_" + attr_stem + "_flag"
+            setattr(xf, attr, reg & 1)
+            reg >>= 1
+        upkbits(xf.background, pkd_bkg_34, (
+            ( 0, 0x003F, 'fill_pattern'),
+            ( 6, 0x07C0, 'pattern_colour_index'),
+            (11, 0xF800, 'background_colour_index'),
+            ))
+        upkbitsL(xf.border, pkd_brd_34, (
+            ( 0, 0x00000007,  'top_line_style'),
+            ( 3, 0x000000F8,  'top_colour_index'),
+            ( 8, 0x00000700,  'left_line_style'),
+            (11, 0x0000F800,  'left_colour_index'),
+            (16, 0x00070000,  'bottom_line_style'),
+            (19, 0x00F80000,  'bottom_colour_index'),
+            (24, 0x07000000,  'right_line_style'),
+            (27, 0xF8000000, 'right_colour_index'),
+            ))
+    elif bv == 30:
+        unpack_fmt = '<BBBBHHI'
+        (xf.font_index, xf.format_key, pkd_type_prot,
+        pkd_used, pkd_align_par,
+        pkd_bkg_34, pkd_brd_34,
+        ) = unpack(unpack_fmt, data[0:12])
+        upkbits(xf.protection, pkd_type_prot, (
+            (0, 0x01, 'cell_locked'),
+            (1, 0x02, 'formula_hidden'),
+            ))
+        upkbits(xf, pkd_type_prot, (
+            (2, 0x0004, 'is_style'),
+            (3, 0x0008, 'lotus_123_prefix'), # Meaning is not known.
+            ))
+        upkbits(xf.alignment, pkd_align_par, (
+            (0, 0x07, 'hor_align'),
+            (3, 0x08, 'text_wrapped'),
+            ))
+        upkbits(xf, pkd_align_par, (
+            (4, 0xFFF0, 'parent_style_index'),
+            ))
+        reg = pkd_used >> 2
+        for attr_stem in \
+            "format font alignment border background protection".split():
+            attr = "_" + attr_stem + "_flag"
+            setattr(xf, attr, reg & 1)
+            reg >>= 1
+        upkbits(xf.background, pkd_bkg_34, (
+            ( 0, 0x003F, 'fill_pattern'),
+            ( 6, 0x07C0, 'pattern_colour_index'),
+            (11, 0xF800, 'background_colour_index'),
+            ))
+        upkbitsL(xf.border, pkd_brd_34, (
+            ( 0, 0x00000007,  'top_line_style'),
+            ( 3, 0x000000F8,  'top_colour_index'),
+            ( 8, 0x00000700,  'left_line_style'),
+            (11, 0x0000F800,  'left_colour_index'),
+            (16, 0x00070000,  'bottom_line_style'),
+            (19, 0x00F80000,  'bottom_colour_index'),
+            (24, 0x07000000,  'right_line_style'),
+            (27, 0xF8000000, 'right_colour_index'),
+            ))
+        xf.alignment.vert_align = 2 # bottom
+        xf.alignment.rotation = 0
+    elif bv == 21:
+        #### Warning: incomplete treatment; formatting_info not fully supported.
+        #### Probably need to offset incoming BIFF2 XF[n] to BIFF8-like XF[n+16],
+        #### and create XF[0:16] like the standard ones in BIFF8
+        #### *AND* add 16 to all XF references in cell records :-(
+        (xf.font_index, format_etc, halign_etc) = unpack('<BxBB', data)
+        xf.format_key = format_etc & 0x3F
+        upkbits(xf.protection, format_etc, (
+            (6, 0x40, 'cell_locked'),
+            (7, 0x80, 'formula_hidden'),
+            ))
+        upkbits(xf.alignment, halign_etc, (
+            (0, 0x07, 'hor_align'),
+            ))
+        for mask, side in ((0x08, 'left'), (0x10, 'right'), (0x20, 'top'), (0x40, 'bottom')):
+            if halign_etc & mask:
+                colour_index, line_style = 8, 1 # black, thin
+            else:
+                colour_index, line_style = 0, 0 # none, none
+            setattr(xf.border, side + '_colour_index', colour_index)
+            setattr(xf.border, side + '_line_style', line_style)
+        bg = xf.background
+        if halign_etc & 0x80:
+            bg.fill_pattern = 17
+        else:
+            bg.fill_pattern = 0
+        bg.background_colour_index = 9 # white
+        bg.pattern_colour_index = 8 # black
+        xf.parent_style_index = 0 # ???????????
+        xf.alignment.vert_align = 2 # bottom
+        xf.alignment.rotation = 0
+        for attr_stem in \
+            "format font alignment border background protection".split():
+            attr = "_" + attr_stem + "_flag"
+            setattr(xf, attr, 1)
+    else:
+        raise XLRDError('programmer stuff-up: bv=%d' % bv)
+
+    xf.xf_index = len(self.xf_list)
+    self.xf_list.append(xf)
+    self.xfcount += 1
+    if verbose:
+        xf.dump(
+            self.logfile,
+            header="--- handle_xf: xf[%d] ---" % xf.xf_index,
+            footer=" ",
+        )
+    # Now for some assertions ...
+    if self.formatting_info:
+        if xf.is_style and xf.parent_style_index != 0x0FFF:
+            msg = "WARNING *** XF[%d] is a style XF but parent_style_index is 0x%04x, not 0x0fff\n"
+            fprintf(self.logfile, msg, xf.xf_index, xf.parent_style_index)
+        check_colour_indexes_in_obj(self, xf, xf.xf_index)
+    if xf.format_key not in self.format_map:
+        msg = "WARNING *** XF[%d] unknown (raw) format key (%d, 0x%04x)\n"
+        fprintf(self.logfile, msg,
+                xf.xf_index, xf.format_key, xf.format_key)
+        xf.format_key = 0
+
+def xf_epilogue(self):
+    # self is a Book instance.
+    self._xf_epilogue_done = 1
+    num_xfs = len(self.xf_list)
+    verbose = DEBUG or self.verbosity >= 3
+    verbose1 = DEBUG or self.verbosity >= 1
+    if verbose:
+        fprintf(self.logfile, "xf_epilogue called ...\n")
+
+    def check_same(book_arg, xf_arg, parent_arg, attr):
+        # the _arg caper is to avoid a Warning msg from Python 2.1 :-(
+        if getattr(xf_arg, attr) != getattr(parent_arg, attr):
+            fprintf(book_arg.logfile,
+                "NOTE !!! XF[%d] parent[%d] %s different\n",
+                xf_arg.xf_index, parent_arg.xf_index, attr)
+
+    for xfx in range(num_xfs):
+        xf = self.xf_list[xfx]
+        if xf.format_key not in self.format_map:
+            msg = "ERROR *** XF[%d] unknown format key (%d, 0x%04x)\n"
+            fprintf(self.logfile, msg,
+                    xf.xf_index, xf.format_key, xf.format_key)
+            xf.format_key = 0
+        cellty_from_fmtty = {
+            FNU: XL_CELL_NUMBER,
+            FUN: XL_CELL_NUMBER,
+            FGE: XL_CELL_NUMBER,
+            FDT: XL_CELL_DATE,
+            FTX: XL_CELL_NUMBER, # Yes, a number can be formatted as text.
+            }
+        fmt = self.format_map[xf.format_key]
+        cellty = cellty_from_fmtty[fmt.type]
+        self._xf_index_to_xl_type_map[xf.xf_index] = cellty
+        # Now for some assertions etc
+        if not self.formatting_info:
+            continue
+        if xf.is_style:
+            continue
+        if not(0 <= xf.parent_style_index < num_xfs):
+            fprintf(self.logfile,
+                "WARNING *** XF[%d]: is_style=%d but parent_style_index=%d\n",
+                xf.xf_index, xf.is_style, xf.parent_style_index)
+            # make it conform
+            xf.parent_style_index = 0
+        if self.biff_version >= 30:
+            assert xf.parent_style_index != xf.xf_index
+            assert self.xf_list[xf.parent_style_index].is_style
+            if verbose1 and xf.parent_style_index > xf.xf_index:
+                fprintf(self.logfile,
+                    "NOTE !!! XF[%d]: parent_style_index is %d; out of order?\n",
+                    xf.xf_index, xf.parent_style_index)
+            parent = self.xf_list[xf.parent_style_index]
+            if not xf._alignment_flag and not parent._alignment_flag:
+                if verbose1: check_same(self, xf, parent, 'alignment')
+            if not xf._background_flag and not parent._background_flag:
+                if verbose1: check_same(self, xf, parent, 'background')
+            if not xf._border_flag and not parent._border_flag:
+                if verbose1: check_same(self, xf, parent, 'border')
+            if not xf._protection_flag and not parent._protection_flag:
+                if verbose1: check_same(self, xf, parent, 'protection')
+            if not xf._format_flag and not parent._format_flag:
+                if verbose1 and xf.format_key != parent.format_key:
+                    fprintf(self.logfile,
+                        "NOTE !!! XF[%d] fmtk=%d, parent[%d] fmtk=%r\n%r / %r\n",
+                        xf.xf_index, xf.format_key, parent.xf_index, parent.format_key,
+                        self.format_map[xf.format_key].format_str,
+                        self.format_map[parent.format_key].format_str)
+            if not xf._font_flag and not parent._font_flag:
+                if verbose1 and xf.font_index != parent.font_index:
+                    fprintf(self.logfile,
+                        "NOTE !!! XF[%d] fontx=%d, parent[%d] fontx=%r\n",
+                        xf.xf_index, xf.font_index, parent.xf_index, parent.font_index)
+
+def initialise_book(book):
+    initialise_colour_map(book)
+    book._xf_epilogue_done = 0
+    methods = (
+        handle_font,
+        handle_efont,
+        handle_format,
+        is_date_format_string,
+        handle_palette,
+        palette_epilogue,
+        handle_style,
+        handle_xf,
+        xf_epilogue,
+        )
+    for method in methods:
+        setattr(book.__class__, method.__name__, method)
+
+class XFBorder(BaseObject, EqNeAttrs):
+    """ A collection of the border-related attributes of an XF record.
+
+    Items correspond to those in the Excel UI's Format/Cells/Border tab.
+    An explanations of "colour index" is given in the Formatting
+    section at the start of this document.
+    There are five line style attributes; possible values and the
+    associated meanings are:
+
+    0 = No line,
+    1 = Thin,
+    2 = Medium,
+    3 = Dashed,
+    4 = Dotted,
+    5 = Thick,
+    6 = Double,
+    7 = Hair,
+    8 = Medium dashed,
+    9 = Thin dash-dotted,
+    10 = Medium dash-dotted,
+    11 = Thin dash-dot-dotted,
+    12 = Medium dash-dot-dotted,
+    13 = Slanted medium dash-dotted.
+    The line styles 8 to 13 appear in BIFF8 files (Excel 97 and later) only.
+    For pictures of the line styles, refer to OOo docs s3.10 (p22)
+    "Line Styles for Cell Borders (BIFF3-BIFF8)".</p>
+    - New in version 0.6.1
+    """
+
+    # The colour index for the cell's top line
+    top_colour_index = 0
+    # The colour index for the cell's bottom line
+    bottom_colour_index = 0
+    # The colour index for the cell's left line
+    left_colour_index = 0
+    # The colour index for the cell's right line
+    right_colour_index = 0
+    # The colour index for the cell's diagonal lines, if any
+    diag_colour_index = 0
+    # The line style for the cell's top line
+    top_line_style = 0
+    # The line style for the cell's bottom line
+    bottom_line_style = 0
+    # The line style for the cell's left line
+    left_line_style = 0
+    # The line style for the cell's right line
+    right_line_style = 0
+    # The line style for the cell's diagonal lines, if any
+    diag_line_style = 0
+    # 1 = draw a diagonal from top left to bottom right
+    diag_down = 0
+    # 1 = draw a diagonal from bottom left to top right
+    diag_up = 0
+
+# New in version 0.6.1
+class XFBackground(BaseObject, EqNeAttrs):
+    """ A collection of the background-related attributes of an XF record.
+
+    Items correspond to those in the Excel UI's Format/Cells/Patterns tab.
+    An explanation of "colour index" is given in the Formatting
+    section at the start of this document.
+
+    """
+    # See section 3.11 of the OOo docs.
+    fill_pattern = 0
+    # See section 3.11 of the OOo docs.
+    background_colour_index = 0
+    # See section 3.11 of the OOo docs.
+    pattern_colour_index = 0
+
+# New in version 0.6.1
+class XFAlignment(BaseObject, EqNeAttrs):
+    """ A collection of the alignment and similar attributes of an XF record.
+
+    Items correspond to those in the Excel UI's Format/Cells/Alignment tab.
+    """
+    # Values: section 5.115 (p 219) of OOo docs
+    hor_align = 0
+    # Values: section 5.115 (p 220) of OOo docs
+    vert_align = 0
+    # Values: section 5.115 (p 220) of OOo docs.
+    # Note: file versions BIFF7 and earlier use the documented
+    # "orientation" attribute; this will be mapped (without loss)
+    # into "rotation".
+    rotation = 0
+    # 1 = text is wrapped at right margin
+    text_wrapped = 0
+    # A number in range(15).
+    indent_level = 0
+    # 1 = shrink font size to fit text into cell.
+    shrink_to_fit = 0
+    # 0 = according to context; 1 = left-to-right; 2 = right-to-left
+    text_direction = 0
+
+# New in version 0.6.1
+class XFProtection(BaseObject, EqNeAttrs):
+    """ A collection of the protection-related attributes of an XF record.
+
+    Items correspond to those in the Excel UI's Format/Cells/Protection tab.
+    Note the OOo docs include the "cell or style" bit
+    in this bundle of attributes.
+    This is incorrect; the bit is used in determining which bundles to use.
+
+    """
+    # 1 = Cell is prevented from being changed, moved, resized, or deleted
+    # (only if the sheet is protected).
+    cell_locked = 0
+    # 1 = Hide formula so that it doesn't appear in the formula bar when
+    # the cell is selected (only if the sheet is protected).
+    formula_hidden = 0
+
+# New in version 0.6.1
+class XF(BaseObject):
+    """ eXtended Formatting information for cells, rows, columns and styles.
+
+    Each of the 6 flags below describes the validity of
+    a specific group of attributes.
+
+    In cell XFs, flag==0 means the attributes of the parent style XF are used,
+    (but only if the attributes are valid there); flag==1 means the attributes
+    of this XF are used.
+    In style XFs, flag==0 means the attribute setting is valid; flag==1 means
+    the attribute should be ignored.
+    Note that the API
+    provides both "raw" XFs and "computed" XFs -- in the latter case, cell XFs
+    have had the above inheritance mechanism applied.
+    """
+    # 0 = cell XF, 1 = style XF
+    is_style = 0
+    # cell XF: Index into Book.xf_list
+    # of this XF's style XF
+    # style XF: 0xFFF
+    parent_style_index = 0
+    _format_flag = 0
+    _font_flag = 0
+    _alignment_flag = 0
+    _border_flag = 0
+    _background_flag = 0
+    _protection_flag = 0
+    # Index into Book.xf_list
+    xf_index = 0
+    # Index into Book.font_list
+    font_index = 0
+    # Key into Book.format_map
+    #
+    # Warning: OOo docs on the XF record call this "Index to FORMAT record".
+    # It is not an index in the Python sense. It is a key to a map.
+    # It is true **only** for Excel 4.0 and earlier files
+    # that the key into format_map from an XF instance
+    # is the same as the index into format_list, and **only**
+    # if the index is less than 164.
+    #
+    format_key = 0
+    # An instance of an XFProtection object.
+    protection = None
+    # An instance of an XFBackground object.
+    background = None
+    # An instance of an XFAlignment object.
+    alignment = None
+    # An instance of an XFBorder object.
+    border = None
diff --git a/tablib/packages/xlrd3/formula.py b/tablib/packages/xlrd3/formula.py
new file mode 100644
index 0000000..445d761
--- /dev/null
+++ b/tablib/packages/xlrd3/formula.py
@@ -0,0 +1,2083 @@
+# Module for parsing/evaluating Microsoft Excel formulas.
+#
+# Copyright © 2005-2009 Stephen John Machin, Lingfo Pty Ltd
+# This module is part of the xlrd3 package, which is released under
+# a BSD-style licence.
+
+# No part of the content of this file was derived from the works of David Giffin.
+
+import copy
+from struct import unpack
+
+from .biffh import unpack_unicode_update_pos, unpack_string_update_pos, \
+    XLRDError, hex_char_dump, error_text_from_code, BaseObject
+
+__all__ = [
+    'oBOOL', 'oERR', 'oNUM', 'oREF', 'oREL', 'oSTRG', 'oUNK',
+    'decompile_formula',
+    'dump_formula',
+    'evaluate_name_formula',
+    'okind_dict',
+    'rangename3d', 'rangename3drel', 'cellname', 'cellnameabs', 'colname',
+    ]
+
+# sztabN[opcode] -> the number of bytes to consume.
+# -1 means variable
+# -2 means this opcode not implemented in this version.
+# Which N to use? Depends on biff_version; see szdict.
+sztab0 = [-2, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, -1, -2, -1, 8, 4, 2, 2, 3, 9, 8, 2, 3, 8, 4, 7, 5, 5, 5, 2, 4, 7, 4, 7, 2, 2, -2, -2, -2, -2, -2, -2, -2, -2, 3, -2, -2, -2, -2, -2, -2, -2]
+sztab1 = [-2, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, -1, -2, -1, 11, 5, 2, 2, 3, 9, 9, 2, 3, 11, 4, 7, 7, 7, 7, 3, 4, 7, 4, 7, 3, 3, -2, -2, -2, -2, -2, -2, -2, -2, 3, -2, -2, -2, -2, -2, -2, -2]
+sztab2 = [-2, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, -1, -2, -1, 11, 5, 2, 2, 3, 9, 9, 3, 4, 11, 4, 7, 7, 7, 7, 3, 4, 7, 4, 7, 3, 3, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2, -2]
+sztab3 = [-2, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, -1, -2, -1, -2, -2, 2, 2, 3, 9, 9, 3, 4, 15, 4, 7, 7, 7, 7, 3, 4, 7, 4, 7, 3, 3, -2, -2, -2, -2, -2, -2, -2, -2, -2, 25, 18, 21, 18, 21, -2, -2]
+sztab4 = [-2, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, -1, -1, -1, -2, -2, 2, 2, 3, 9, 9, 3, 4, 5, 5, 9, 7, 7, 7, 3, 5, 9, 5, 9, 3, 3, -2, -2, -2, -2, -2, -2, -2, -2, -2, 7, 7, 11, 7, 11, -2, -2]
+
+szdict = {
+    20 : sztab0,
+    21 : sztab0, # Suppose 21 is same as 20....
+    30 : sztab1,
+    40 : sztab2,
+    45 : sztab2,
+    50 : sztab3,
+    70 : sztab3,
+    80 : sztab4,
+    }
+
+# For debugging purposes ... the name for each opcode
+# (without the prefix "t" used on OOo docs)
+onames = ['Unk00', 'Exp', 'Tbl', 'Add', 'Sub', 'Mul', 'Div', 'Power', 'Concat', 'LT', 'LE', 'EQ', 'GE', 'GT', 'NE', 'Isect', 'List', 'Range', 'Uplus', 'Uminus', 'Percent', 'Paren', 'MissArg', 'Str', 'Extended', 'Attr', 'Sheet', 'EndSheet', 'Err', 'Bool', 'Int', 'Num', 'Array', 'Func', 'FuncVar', 'Name', 'Ref', 'Area', 'MemArea', 'MemErr', 'MemNoMem', 'MemFunc', 'RefErr', 'AreaErr', 'RefN', 'AreaN', 'MemAreaN', 'MemNoMemN', '', '', '', '', '', '', '', '', 'FuncCE', 'NameX', 'Ref3d', 'Area3d', 'RefErr3d', 'AreaErr3d', '', '']
+
+func_defs = {
+    # index: (name, min#args, max#args, flags, #known_args, return_type, kargs)
+    0  : ('COUNT',            0, 30, 0x04,  1, 'V', 'R'),
+    1  : ('IF',               2,  3, 0x04,  3, 'V', 'VRR'),
+    2  : ('ISNA',             1,  1, 0x02,  1, 'V', 'V'),
+    3  : ('ISERROR',          1,  1, 0x02,  1, 'V', 'V'),
+    4  : ('SUM',              0, 30, 0x04,  1, 'V', 'R'),
+    5  : ('AVERAGE',          1, 30, 0x04,  1, 'V', 'R'),
+    6  : ('MIN',              1, 30, 0x04,  1, 'V', 'R'),
+    7  : ('MAX',              1, 30, 0x04,  1, 'V', 'R'),
+    8  : ('ROW',              0,  1, 0x04,  1, 'V', 'R'),
+    9  : ('COLUMN',           0,  1, 0x04,  1, 'V', 'R'),
+    10 : ('NA',               0,  0, 0x02,  0, 'V', ''),
+    11 : ('NPV',              2, 30, 0x04,  2, 'V', 'VR'),
+    12 : ('STDEV',            1, 30, 0x04,  1, 'V', 'R'),
+    13 : ('DOLLAR',           1,  2, 0x04,  1, 'V', 'V'),
+    14 : ('FIXED',            2,  3, 0x04,  3, 'V', 'VVV'),
+    15 : ('SIN',              1,  1, 0x02,  1, 'V', 'V'),
+    16 : ('COS',              1,  1, 0x02,  1, 'V', 'V'),
+    17 : ('TAN',              1,  1, 0x02,  1, 'V', 'V'),
+    18 : ('ATAN',             1,  1, 0x02,  1, 'V', 'V'),
+    19 : ('PI',               0,  0, 0x02,  0, 'V', ''),
+    20 : ('SQRT',             1,  1, 0x02,  1, 'V', 'V'),
+    21 : ('EXP',              1,  1, 0x02,  1, 'V', 'V'),
+    22 : ('LN',               1,  1, 0x02,  1, 'V', 'V'),
+    23 : ('LOG10',            1,  1, 0x02,  1, 'V', 'V'),
+    24 : ('ABS',              1,  1, 0x02,  1, 'V', 'V'),
+    25 : ('INT',              1,  1, 0x02,  1, 'V', 'V'),
+    26 : ('SIGN',             1,  1, 0x02,  1, 'V', 'V'),
+    27 : ('ROUND',            2,  2, 0x02,  2, 'V', 'VV'),
+    28 : ('LOOKUP',           2,  3, 0x04,  2, 'V', 'VR'),
+    29 : ('INDEX',            2,  4, 0x0c,  4, 'R', 'RVVV'),
+    30 : ('REPT',             2,  2, 0x02,  2, 'V', 'VV'),
+    31 : ('MID',              3,  3, 0x02,  3, 'V', 'VVV'),
+    32 : ('LEN',              1,  1, 0x02,  1, 'V', 'V'),
+    33 : ('VALUE',            1,  1, 0x02,  1, 'V', 'V'),
+    34 : ('TRUE',             0,  0, 0x02,  0, 'V', ''),
+    35 : ('FALSE',            0,  0, 0x02,  0, 'V', ''),
+    36 : ('AND',              1, 30, 0x04,  1, 'V', 'R'),
+    37 : ('OR',               1, 30, 0x04,  1, 'V', 'R'),
+    38 : ('NOT',              1,  1, 0x02,  1, 'V', 'V'),
+    39 : ('MOD',              2,  2, 0x02,  2, 'V', 'VV'),
+    40 : ('DCOUNT',           3,  3, 0x02,  3, 'V', 'RRR'),
+    41 : ('DSUM',             3,  3, 0x02,  3, 'V', 'RRR'),
+    42 : ('DAVERAGE',         3,  3, 0x02,  3, 'V', 'RRR'),
+    43 : ('DMIN',             3,  3, 0x02,  3, 'V', 'RRR'),
+    44 : ('DMAX',             3,  3, 0x02,  3, 'V', 'RRR'),
+    45 : ('DSTDEV',           3,  3, 0x02,  3, 'V', 'RRR'),
+    46 : ('VAR',              1, 30, 0x04,  1, 'V', 'R'),
+    47 : ('DVAR',             3,  3, 0x02,  3, 'V', 'RRR'),
+    48 : ('TEXT',             2,  2, 0x02,  2, 'V', 'VV'),
+    49 : ('LINEST',           1,  4, 0x04,  4, 'A', 'RRVV'),
+    50 : ('TREND',            1,  4, 0x04,  4, 'A', 'RRRV'),
+    51 : ('LOGEST',           1,  4, 0x04,  4, 'A', 'RRVV'),
+    52 : ('GROWTH',           1,  4, 0x04,  4, 'A', 'RRRV'),
+    56 : ('PV',               3,  5, 0x04,  5, 'V', 'VVVVV'),
+    57 : ('FV',               3,  5, 0x04,  5, 'V', 'VVVVV'),
+    58 : ('NPER',             3,  5, 0x04,  5, 'V', 'VVVVV'),
+    59 : ('PMT',              3,  5, 0x04,  5, 'V', 'VVVVV'),
+    60 : ('RATE',             3,  6, 0x04,  6, 'V', 'VVVVVV'),
+    61 : ('MIRR',             3,  3, 0x02,  3, 'V', 'RVV'),
+    62 : ('IRR',              1,  2, 0x04,  2, 'V', 'RV'),
+    63 : ('RAND',             0,  0, 0x0a,  0, 'V', ''),
+    64 : ('MATCH',            2,  3, 0x04,  3, 'V', 'VRR'),
+    65 : ('DATE',             3,  3, 0x02,  3, 'V', 'VVV'),
+    66 : ('TIME',             3,  3, 0x02,  3, 'V', 'VVV'),
+    67 : ('DAY',              1,  1, 0x02,  1, 'V', 'V'),
+    68 : ('MONTH',            1,  1, 0x02,  1, 'V', 'V'),
+    69 : ('YEAR',             1,  1, 0x02,  1, 'V', 'V'),
+    70 : ('WEEKDAY',          1,  2, 0x04,  2, 'V', 'VV'),
+    71 : ('HOUR',             1,  1, 0x02,  1, 'V', 'V'),
+    72 : ('MINUTE',           1,  1, 0x02,  1, 'V', 'V'),
+    73 : ('SECOND',           1,  1, 0x02,  1, 'V', 'V'),
+    74 : ('NOW',              0,  0, 0x0a,  0, 'V', ''),
+    75 : ('AREAS',            1,  1, 0x02,  1, 'V', 'R'),
+    76 : ('ROWS',             1,  1, 0x02,  1, 'V', 'R'),
+    77 : ('COLUMNS',          1,  1, 0x02,  1, 'V', 'R'),
+    78 : ('OFFSET',           3,  5, 0x04,  5, 'R', 'RVVVV'),
+    82 : ('SEARCH',           2,  3, 0x04,  3, 'V', 'VVV'),
+    83 : ('TRANSPOSE',        1,  1, 0x02,  1, 'A', 'A'),
+    86 : ('TYPE',             1,  1, 0x02,  1, 'V', 'V'),
+    92 : ('SERIESSUM',        4,  4, 0x02,  4, 'V', 'VVVA'),
+    97 : ('ATAN2',            2,  2, 0x02,  2, 'V', 'VV'),
+    98 : ('ASIN',             1,  1, 0x02,  1, 'V', 'V'),
+    99 : ('ACOS',             1,  1, 0x02,  1, 'V', 'V'),
+    100: ('CHOOSE',           2, 30, 0x04,  2, 'V', 'VR'),
+    101: ('HLOOKUP',          3,  4, 0x04,  4, 'V', 'VRRV'),
+    102: ('VLOOKUP',          3,  4, 0x04,  4, 'V', 'VRRV'),
+    105: ('ISREF',            1,  1, 0x02,  1, 'V', 'R'),
+    109: ('LOG',              1,  2, 0x04,  2, 'V', 'VV'),
+    111: ('CHAR',             1,  1, 0x02,  1, 'V', 'V'),
+    112: ('LOWER',            1,  1, 0x02,  1, 'V', 'V'),
+    113: ('UPPER',            1,  1, 0x02,  1, 'V', 'V'),
+    114: ('PROPER',           1,  1, 0x02,  1, 'V', 'V'),
+    115: ('LEFT',             1,  2, 0x04,  2, 'V', 'VV'),
+    116: ('RIGHT',            1,  2, 0x04,  2, 'V', 'VV'),
+    117: ('EXACT',            2,  2, 0x02,  2, 'V', 'VV'),
+    118: ('TRIM',             1,  1, 0x02,  1, 'V', 'V'),
+    119: ('REPLACE',          4,  4, 0x02,  4, 'V', 'VVVV'),
+    120: ('SUBSTITUTE',       3,  4, 0x04,  4, 'V', 'VVVV'),
+    121: ('CODE',             1,  1, 0x02,  1, 'V', 'V'),
+    124: ('FIND',             2,  3, 0x04,  3, 'V', 'VVV'),
+    125: ('CELL',             1,  2, 0x0c,  2, 'V', 'VR'),
+    126: ('ISERR',            1,  1, 0x02,  1, 'V', 'V'),
+    127: ('ISTEXT',           1,  1, 0x02,  1, 'V', 'V'),
+    128: ('ISNUMBER',         1,  1, 0x02,  1, 'V', 'V'),
+    129: ('ISBLANK',          1,  1, 0x02,  1, 'V', 'V'),
+    130: ('T',                1,  1, 0x02,  1, 'V', 'R'),
+    131: ('N',                1,  1, 0x02,  1, 'V', 'R'),
+    140: ('DATEVALUE',        1,  1, 0x02,  1, 'V', 'V'),
+    141: ('TIMEVALUE',        1,  1, 0x02,  1, 'V', 'V'),
+    142: ('SLN',              3,  3, 0x02,  3, 'V', 'VVV'),
+    143: ('SYD',              4,  4, 0x02,  4, 'V', 'VVVV'),
+    144: ('DDB',              4,  5, 0x04,  5, 'V', 'VVVVV'),
+    148: ('INDIRECT',         1,  2, 0x0c,  2, 'R', 'VV'),
+    162: ('CLEAN',            1,  1, 0x02,  1, 'V', 'V'),
+    163: ('MDETERM',          1,  1, 0x02,  1, 'V', 'A'),
+    164: ('MINVERSE',         1,  1, 0x02,  1, 'A', 'A'),
+    165: ('MMULT',            2,  2, 0x02,  2, 'A', 'AA'),
+    167: ('IPMT',             4,  6, 0x04,  6, 'V', 'VVVVVV'),
+    168: ('PPMT',             4,  6, 0x04,  6, 'V', 'VVVVVV'),
+    169: ('COUNTA',           0, 30, 0x04,  1, 'V', 'R'),
+    183: ('PRODUCT',          0, 30, 0x04,  1, 'V', 'R'),
+    184: ('FACT',             1,  1, 0x02,  1, 'V', 'V'),
+    189: ('DPRODUCT',         3,  3, 0x02,  3, 'V', 'RRR'),
+    190: ('ISNONTEXT',        1,  1, 0x02,  1, 'V', 'V'),
+    193: ('STDEVP',           1, 30, 0x04,  1, 'V', 'R'),
+    194: ('VARP',             1, 30, 0x04,  1, 'V', 'R'),
+    195: ('DSTDEVP',          3,  3, 0x02,  3, 'V', 'RRR'),
+    196: ('DVARP',            3,  3, 0x02,  3, 'V', 'RRR'),
+    197: ('TRUNC',            1,  2, 0x04,  2, 'V', 'VV'),
+    198: ('ISLOGICAL',        1,  1, 0x02,  1, 'V', 'V'),
+    199: ('DCOUNTA',          3,  3, 0x02,  3, 'V', 'RRR'),
+    204: ('USDOLLAR',         1,  2, 0x04,  2, 'V', 'VV'),
+    205: ('FINDB',            2,  3, 0x04,  3, 'V', 'VVV'),
+    206: ('SEARCHB',          2,  3, 0x04,  3, 'V', 'VVV'),
+    207: ('REPLACEB',         4,  4, 0x02,  4, 'V', 'VVVV'),
+    208: ('LEFTB',            1,  2, 0x04,  2, 'V', 'VV'),
+    209: ('RIGHTB',           1,  2, 0x04,  2, 'V', 'VV'),
+    210: ('MIDB',             3,  3, 0x02,  3, 'V', 'VVV'),
+    211: ('LENB',             1,  1, 0x02,  1, 'V', 'V'),
+    212: ('ROUNDUP',          2,  2, 0x02,  2, 'V', 'VV'),
+    213: ('ROUNDDOWN',        2,  2, 0x02,  2, 'V', 'VV'),
+    214: ('ASC',              1,  1, 0x02,  1, 'V', 'V'),
+    215: ('DBCS',             1,  1, 0x02,  1, 'V', 'V'),
+    216: ('RANK',             2,  3, 0x04,  3, 'V', 'VRV'),
+    219: ('ADDRESS',          2,  5, 0x04,  5, 'V', 'VVVVV'),
+    220: ('DAYS360',          2,  3, 0x04,  3, 'V', 'VVV'),
+    221: ('TODAY',            0,  0, 0x0a,  0, 'V', ''),
+    222: ('VDB',              5,  7, 0x04,  7, 'V', 'VVVVVVV'),
+    227: ('MEDIAN',           1, 30, 0x04,  1, 'V', 'R'),
+    228: ('SUMPRODUCT',       1, 30, 0x04,  1, 'V', 'A'),
+    229: ('SINH',             1,  1, 0x02,  1, 'V', 'V'),
+    230: ('COSH',             1,  1, 0x02,  1, 'V', 'V'),
+    231: ('TANH',             1,  1, 0x02,  1, 'V', 'V'),
+    232: ('ASINH',            1,  1, 0x02,  1, 'V', 'V'),
+    233: ('ACOSH',            1,  1, 0x02,  1, 'V', 'V'),
+    234: ('ATANH',            1,  1, 0x02,  1, 'V', 'V'),
+    235: ('DGET',             3,  3, 0x02,  3, 'V', 'RRR'),
+    244: ('INFO',             1,  1, 0x02,  1, 'V', 'V'),
+    247: ('DB',               4,  5, 0x04,  5, 'V', 'VVVVV'),
+    252: ('FREQUENCY',        2,  2, 0x02,  2, 'A', 'RR'),
+    261: ('ERROR.TYPE',       1,  1, 0x02,  1, 'V', 'V'),
+    269: ('AVEDEV',           1, 30, 0x04,  1, 'V', 'R'),
+    270: ('BETADIST',         3,  5, 0x04,  1, 'V', 'V'),
+    271: ('GAMMALN',          1,  1, 0x02,  1, 'V', 'V'),
+    272: ('BETAINV',          3,  5, 0x04,  1, 'V', 'V'),
+    273: ('BINOMDIST',        4,  4, 0x02,  4, 'V', 'VVVV'),
+    274: ('CHIDIST',          2,  2, 0x02,  2, 'V', 'VV'),
+    275: ('CHIINV',           2,  2, 0x02,  2, 'V', 'VV'),
+    276: ('COMBIN',           2,  2, 0x02,  2, 'V', 'VV'),
+    277: ('CONFIDENCE',       3,  3, 0x02,  3, 'V', 'VVV'),
+    278: ('CRITBINOM',        3,  3, 0x02,  3, 'V', 'VVV'),
+    279: ('EVEN',             1,  1, 0x02,  1, 'V', 'V'),
+    280: ('EXPONDIST',        3,  3, 0x02,  3, 'V', 'VVV'),
+    281: ('FDIST',            3,  3, 0x02,  3, 'V', 'VVV'),
+    282: ('FINV',             3,  3, 0x02,  3, 'V', 'VVV'),
+    283: ('FISHER',           1,  1, 0x02,  1, 'V', 'V'),
+    284: ('FISHERINV',        1,  1, 0x02,  1, 'V', 'V'),
+    285: ('FLOOR',            2,  2, 0x02,  2, 'V', 'VV'),
+    286: ('GAMMADIST',        4,  4, 0x02,  4, 'V', 'VVVV'),
+    287: ('GAMMAINV',         3,  3, 0x02,  3, 'V', 'VVV'),
+    288: ('CEILING',          2,  2, 0x02,  2, 'V', 'VV'),
+    289: ('HYPGEOMDIST',      4,  4, 0x02,  4, 'V', 'VVVV'),
+    290: ('LOGNORMDIST',      3,  3, 0x02,  3, 'V', 'VVV'),
+    291: ('LOGINV',           3,  3, 0x02,  3, 'V', 'VVV'),
+    292: ('NEGBINOMDIST',     3,  3, 0x02,  3, 'V', 'VVV'),
+    293: ('NORMDIST',         4,  4, 0x02,  4, 'V', 'VVVV'),
+    294: ('NORMSDIST',        1,  1, 0x02,  1, 'V', 'V'),
+    295: ('NORMINV',          3,  3, 0x02,  3, 'V', 'VVV'),
+    296: ('NORMSINV',         1,  1, 0x02,  1, 'V', 'V'),
+    297: ('STANDARDIZE',      3,  3, 0x02,  3, 'V', 'VVV'),
+    298: ('ODD',              1,  1, 0x02,  1, 'V', 'V'),
+    299: ('PERMUT',           2,  2, 0x02,  2, 'V', 'VV'),
+    300: ('POISSON',          3,  3, 0x02,  3, 'V', 'VVV'),
+    301: ('TDIST',            3,  3, 0x02,  3, 'V', 'VVV'),
+    302: ('WEIBULL',          4,  4, 0x02,  4, 'V', 'VVVV'),
+    303: ('SUMXMY2',          2,  2, 0x02,  2, 'V', 'AA'),
+    304: ('SUMX2MY2',         2,  2, 0x02,  2, 'V', 'AA'),
+    305: ('SUMX2PY2',         2,  2, 0x02,  2, 'V', 'AA'),
+    306: ('CHITEST',          2,  2, 0x02,  2, 'V', 'AA'),
+    307: ('CORREL',           2,  2, 0x02,  2, 'V', 'AA'),
+    308: ('COVAR',            2,  2, 0x02,  2, 'V', 'AA'),
+    309: ('FORECAST',         3,  3, 0x02,  3, 'V', 'VAA'),
+    310: ('FTEST',            2,  2, 0x02,  2, 'V', 'AA'),
+    311: ('INTERCEPT',        2,  2, 0x02,  2, 'V', 'AA'),
+    312: ('PEARSON',          2,  2, 0x02,  2, 'V', 'AA'),
+    313: ('RSQ',              2,  2, 0x02,  2, 'V', 'AA'),
+    314: ('STEYX',            2,  2, 0x02,  2, 'V', 'AA'),
+    315: ('SLOPE',            2,  2, 0x02,  2, 'V', 'AA'),
+    316: ('TTEST',            4,  4, 0x02,  4, 'V', 'AAVV'),
+    317: ('PROB',             3,  4, 0x04,  3, 'V', 'AAV'),
+    318: ('DEVSQ',            1, 30, 0x04,  1, 'V', 'R'),
+    319: ('GEOMEAN',          1, 30, 0x04,  1, 'V', 'R'),
+    320: ('HARMEAN',          1, 30, 0x04,  1, 'V', 'R'),
+    321: ('SUMSQ',            0, 30, 0x04,  1, 'V', 'R'),
+    322: ('KURT',             1, 30, 0x04,  1, 'V', 'R'),
+    323: ('SKEW',             1, 30, 0x04,  1, 'V', 'R'),
+    324: ('ZTEST',            2,  3, 0x04,  2, 'V', 'RV'),
+    325: ('LARGE',            2,  2, 0x02,  2, 'V', 'RV'),
+    326: ('SMALL',            2,  2, 0x02,  2, 'V', 'RV'),
+    327: ('QUARTILE',         2,  2, 0x02,  2, 'V', 'RV'),
+    328: ('PERCENTILE',       2,  2, 0x02,  2, 'V', 'RV'),
+    329: ('PERCENTRANK',      2,  3, 0x04,  2, 'V', 'RV'),
+    330: ('MODE',             1, 30, 0x04,  1, 'V', 'A'),
+    331: ('TRIMMEAN',         2,  2, 0x02,  2, 'V', 'RV'),
+    332: ('TINV',             2,  2, 0x02,  2, 'V', 'VV'),
+    336: ('CONCATENATE',      0, 30, 0x04,  1, 'V', 'V'),
+    337: ('POWER',            2,  2, 0x02,  2, 'V', 'VV'),
+    342: ('RADIANS',          1,  1, 0x02,  1, 'V', 'V'),
+    343: ('DEGREES',          1,  1, 0x02,  1, 'V', 'V'),
+    344: ('SUBTOTAL',         2, 30, 0x04,  2, 'V', 'VR'),
+    345: ('SUMIF',            2,  3, 0x04,  3, 'V', 'RVR'),
+    346: ('COUNTIF',          2,  2, 0x02,  2, 'V', 'RV'),
+    347: ('COUNTBLANK',       1,  1, 0x02,  1, 'V', 'R'),
+    350: ('ISPMT',            4,  4, 0x02,  4, 'V', 'VVVV'),
+    351: ('DATEDIF',          3,  3, 0x02,  3, 'V', 'VVV'),
+    352: ('DATESTRING',       1,  1, 0x02,  1, 'V', 'V'),
+    353: ('NUMBERSTRING',     2,  2, 0x02,  2, 'V', 'VV'),
+    354: ('ROMAN',            1,  2, 0x04,  2, 'V', 'VV'),
+    358: ('GETPIVOTDATA',     2,  2, 0x02,  2, 'V', 'RV'),
+    359: ('HYPERLINK',        1,  2, 0x04,  2, 'V', 'VV'),
+    360: ('PHONETIC',         1,  1, 0x02,  1, 'V', 'V'),
+    361: ('AVERAGEA',         1, 30, 0x04,  1, 'V', 'R'),
+    362: ('MAXA',             1, 30, 0x04,  1, 'V', 'R'),
+    363: ('MINA',             1, 30, 0x04,  1, 'V', 'R'),
+    364: ('STDEVPA',          1, 30, 0x04,  1, 'V', 'R'),
+    365: ('VARPA',            1, 30, 0x04,  1, 'V', 'R'),
+    366: ('STDEVA',           1, 30, 0x04,  1, 'V', 'R'),
+    367: ('VARA',             1, 30, 0x04,  1, 'V', 'R'),
+    368: ('BAHTTEXT',         1,  1, 0x02,  1, 'V', 'V'),
+    369: ('THAIDAYOFWEEK',    1,  1, 0x02,  1, 'V', 'V'),
+    370: ('THAIDIGIT',        1,  1, 0x02,  1, 'V', 'V'),
+    371: ('THAIMONTHOFYEAR',  1,  1, 0x02,  1, 'V', 'V'),
+    372: ('THAINUMSOUND',     1,  1, 0x02,  1, 'V', 'V'),
+    373: ('THAINUMSTRING',    1,  1, 0x02,  1, 'V', 'V'),
+    374: ('THAISTRINGLENGTH', 1,  1, 0x02,  1, 'V', 'V'),
+    375: ('ISTHAIDIGIT',      1,  1, 0x02,  1, 'V', 'V'),
+    376: ('ROUNDBAHTDOWN',    1,  1, 0x02,  1, 'V', 'V'),
+    377: ('ROUNDBAHTUP',      1,  1, 0x02,  1, 'V', 'V'),
+    378: ('THAIYEAR',         1,  1, 0x02,  1, 'V', 'V'),
+    379: ('RTD',              2,  5, 0x04,  1, 'V', 'V'),
+    }
+
+tAttrNames = {
+    0x00: "Skip??", # seen in SAMPLES.XLS which shipped with Excel 5.0
+    0x01: "Volatile",
+    0x02: "If",
+    0x04: "Choose",
+    0x08: "Skip",
+    0x10: "Sum",
+    0x20: "Assign",
+    0x40: "Space",
+    0x41: "SpaceVolatile",
+    }
+
+_error_opcodes = frozenset([0x07, 0x08, 0x0A, 0x0B, 0x1C, 0x1D, 0x2F])
+
+tRangeFuncs = (min, max, min, max, min, max)
+tIsectFuncs = (max, min, max, min, max, min)
+
+def do_box_funcs(box_funcs, boxa, boxb):
+    return tuple([
+        func(numa, numb)
+        for func, numa, numb in zip(box_funcs, boxa.coords, boxb.coords)
+        ])
+
+def adjust_cell_addr_biff8(rowval, colval, reldelta, browx=None, bcolx=None):
+    row_rel = (colval >> 15) & 1
+    col_rel = (colval >> 14) & 1
+    rowx = rowval
+    colx = colval & 0xff
+    if reldelta:
+        if row_rel and rowx >= 32768:
+            rowx -= 65536
+        if col_rel and colx >= 128:
+            colx -= 256
+    else:
+        if row_rel:
+            rowx -= browx
+        if col_rel:
+            colx -= bcolx
+    return rowx, colx, row_rel, col_rel
+
+def adjust_cell_addr_biff_le7(
+        rowval, colval, reldelta, browx=None, bcolx=None):
+    row_rel = (rowval >> 15) & 1
+    col_rel = (rowval >> 14) & 1
+    rowx = rowval & 0x3fff
+    colx = colval
+    if reldelta:
+        if row_rel and rowx >= 8192:
+            rowx -= 16384
+        if col_rel and colx >= 128:
+            colx -= 256
+    else:
+        if row_rel:
+            rowx -= browx
+        if col_rel:
+            colx -= bcolx
+    return rowx, colx, row_rel, col_rel
+
+def get_cell_addr(data, pos, bv, reldelta, browx=None, bcolx=None):
+    if bv >= 80:
+        rowval, colval = unpack("<HH", data[pos:pos+4])
+        # print "    rv=%04xh cv=%04xh" % (rowval, colval)
+        return adjust_cell_addr_biff8(rowval, colval, reldelta, browx, bcolx)
+    else:
+        rowval, colval = unpack("<HB", data[pos:pos+3])
+        # print "    rv=%04xh cv=%04xh" % (rowval, colval)
+        return adjust_cell_addr_biff_le7(
+                    rowval, colval, reldelta, browx, bcolx)
+
+def get_cell_range_addr(data, pos, bv, reldelta, browx=None, bcolx=None):
+    if bv >= 80:
+        row1val, row2val, col1val, col2val = unpack("<HHHH", data[pos:pos+8])
+        # print "    rv=%04xh cv=%04xh" % (row1val, col1val)
+        # print "    rv=%04xh cv=%04xh" % (row2val, col2val)
+        res1 = adjust_cell_addr_biff8(row1val, col1val, reldelta, browx, bcolx)
+        res2 = adjust_cell_addr_biff8(row2val, col2val, reldelta, browx, bcolx)
+        return res1, res2
+    else:
+        row1val, row2val, col1val, col2val = unpack("<HHBB", data[pos:pos+6])
+        # print "    rv=%04xh cv=%04xh" % (row1val, col1val)
+        # print "    rv=%04xh cv=%04xh" % (row2val, col2val)
+        res1 = adjust_cell_addr_biff_le7(
+                    row1val, col1val, reldelta, browx, bcolx)
+        res2 = adjust_cell_addr_biff_le7(
+                    row2val, col2val, reldelta, browx, bcolx)
+        return res1, res2
+
+def get_externsheet_local_range(bk, refx, verbose=0):
+    try:
+        info = bk._externsheet_info[refx]
+    except IndexError:
+        print("!!! get_externsheet_local_range: refx=%d, not in range(%d)" \
+            % (refx, len(bk._externsheet_info)))
+        return (-101, -101)
+    ref_recordx, ref_first_sheetx, ref_last_sheetx = info
+    if ref_recordx == bk._supbook_addins_inx:
+        if verbose:
+            print("/// get_externsheet_local_range(refx=%d) -> addins %r" % (refx, info))
+        assert ref_first_sheetx == 0xFFFE == ref_last_sheetx
+        return (-5, -5)
+    if ref_recordx != bk._supbook_locals_inx:
+        if verbose:
+            print("/// get_externsheet_local_range(refx=%d) -> external %r" % (refx, info))
+        return (-4, -4) # external reference
+    if ref_first_sheetx == 0xFFFE == ref_last_sheetx:
+        if verbose:
+            print("/// get_externsheet_local_range(refx=%d) -> unspecified sheet %r" % (refx, info))
+        return (-1, -1) # internal reference, any sheet
+    if ref_first_sheetx == 0xFFFF == ref_last_sheetx:
+        if verbose:
+            print("/// get_externsheet_local_range(refx=%d) -> deleted sheet(s)" % (refx, ))
+        return (-2, -2) # internal reference, deleted sheet(s)
+    nsheets = len(bk._all_sheets_map)
+    if not(0 <= ref_first_sheetx <= ref_last_sheetx < nsheets):
+        if verbose:
+            print("/// get_externsheet_local_range(refx=%d) -> %r" % (refx, info))
+            print("--- first/last sheet not in range(%d)" % nsheets)
+        return (-102, -102) # stuffed up somewhere :-(
+    xlrd_sheetx1 = bk._all_sheets_map[ref_first_sheetx]
+    xlrd_sheetx2 = bk._all_sheets_map[ref_last_sheetx]
+    if not(0 <= xlrd_sheetx1 <= xlrd_sheetx2):
+        return (-3, -3) # internal reference, but to a macro sheet
+    return xlrd_sheetx1, xlrd_sheetx2
+
+def get_externsheet_local_range_b57(
+        bk, raw_extshtx, ref_first_sheetx, ref_last_sheetx, verbose=0):
+    if raw_extshtx > 0:
+        if verbose:
+            print("/// get_externsheet_local_range_b57(raw_extshtx=%d) -> external" % raw_extshtx)
+        return (-4, -4) # external reference
+    if ref_first_sheetx == -1 and ref_last_sheetx == -1:
+        return (-2, -2) # internal reference, deleted sheet(s)
+    nsheets = len(bk._all_sheets_map)
+    if not(0 <= ref_first_sheetx <= ref_last_sheetx < nsheets):
+        if verbose:
+            print("/// get_externsheet_local_range_b57(%d, %d, %d) -> ???" \
+                % (raw_extshtx, ref_first_sheetx, ref_last_sheetx))
+            print("--- first/last sheet not in range(%d)" % nsheets)
+        return (-103, -103) # stuffed up somewhere :-(
+    xlrd_sheetx1 = bk._all_sheets_map[ref_first_sheetx]
+    xlrd_sheetx2 = bk._all_sheets_map[ref_last_sheetx]
+    if not(0 <= xlrd_sheetx1 <= xlrd_sheetx2):
+        return (-3, -3) # internal reference, but to a macro sheet
+    return xlrd_sheetx1, xlrd_sheetx2
+
+class FormulaError(Exception):
+    pass
+
+oBOOL = 3
+oERR =  4
+oMSNG = 5 # tMissArg
+oNUM =  2
+oREF = -1
+oREL = -2
+oSTRG = 1
+oUNK =  0
+
+okind_dict = {
+    -2: "oREL",
+    -1: "oREF",
+    0 : "oUNK",
+    1 : "oSTRG",
+    2 : "oNUM",
+    3 : "oBOOL",
+    4 : "oERR",
+    5 : "oMSNG",
+    }
+
+listsep = ',' #### probably should depend on locale
+
+##
+# Used in evaluating formulas.
+# The following table describes the kinds and how their values
+# are represented.</p>
+#
+# <table border="1" cellpadding="7">
+# <tr>
+# <th>Kind symbol</th>
+# <th>Kind number</th>
+# <th>Value representation</th>
+# </tr>
+# <tr>
+# <td>oBOOL</td>
+# <td align="center">3</td>
+# <td>integer: 0 => False; 1 => True</td>
+# </tr>
+# <tr>
+# <td>oERR</td>
+# <td align="center">4</td>
+# <td>None, or an int error code (same as XL_CELL_ERROR in the Cell class).
+# </td>
+# </tr>
+# <tr>
+# <td>oMSNG</td>
+# <td align="center">5</td>
+# <td>Used by Excel as a placeholder for a missing (not supplied) function
+# argument. Should *not* appear as a final formula result. Value is None.</td>
+# </tr>
+# <tr>
+# <td>oNUM</td>
+# <td align="center">2</td>
+# <td>A float. Note that there is no way of distinguishing dates.</td>
+# </tr>
+# <tr>
+# <td>oREF</td>
+# <td align="center">-1</td>
+# <td>The value is either None or a non-empty list of
+# absolute Ref3D instances.<br>
+# </td>
+# </tr>
+# <tr>
+# <td>oREL</td>
+# <td align="center">-2</td>
+# <td>The value is None or a non-empty list of
+# fully or partially relative Ref3D instances.
+# </td>
+# </tr>
+# <tr>
+# <td>oSTRG</td>
+# <td align="center">1</td>
+# <td>A Unicode string.</td>
+# </tr>
+# <tr>
+# <td>oUNK</td>
+# <td align="center">0</td>
+# <td>The kind is unknown or ambiguous. The value is None</td>
+# </tr>
+# </table>
+#<p></p>
+
+class Operand(object):
+
+    ##
+    # None means that the actual value of the operand is a variable
+    # (depends on cell data), not a constant.
+    value = None
+    ##
+    # oUNK means that the kind of operand is not known unambiguously.
+    kind = oUNK
+    ##
+    # The reconstituted text of the original formula. Function names will be
+    # in English irrespective of the original language, which doesn't seem
+    # to be recorded anywhere. The separator is ",", not ";" or whatever else
+    # might be more appropriate for the end-user's locale; patches welcome.
+    text = '?'
+
+    def __init__(self, akind=None, avalue=None, arank=0, atext='?'):
+        if akind is not None:
+            self.kind = akind
+        if avalue is not None:
+            self.value = avalue
+        self.rank = arank
+        # rank is an internal gizmo (operator precedence);
+        # it's used in reconstructing formula text.
+        self.text = atext
+
+    def __repr__(self):
+        kind_text = okind_dict.get(self.kind, "?Unknown kind?")
+        return "Operand(kind=%s, value=%r, text=%r)" \
+            % (kind_text, self.value, self.text)
+
+#(to_py3) if CAN_SUBCLASS_BUILTIN:
+# _ref3d_base = tuple
+
+# Represents an absolute or relative 3-dimensional reference to a box
+# of one or more cells.
+# - New in version 0.6.0
+#
+# The `coords` attribute is a tuple of the form:
+# (shtxlo, shtxhi, rowxlo, rowxhi, colxlo, colxhi)
+# where 0 <= thingxlo <= thingx < thingxhi.
+# Note that it is quite possible to have thingx > nthings; for example
+# Print_Titles could have colxhi == 256 and/or rowxhi == 65536
+# irrespective of how many columns/rows are actually used in the worksheet.
+# The caller will need to decide how to handle this situation.
+# Keyword: IndexError :-)
+#
+# The components of the coords attribute are also available as individual
+# attributes: shtxlo, shtxhi, rowxlo, rowxhi, colxlo, and colxhi.
+#
+# The `relflags` attribute is a 6-tuple of flags which indicate whether
+# the corresponding (sheet|row|col)(lo|hi) is relative (1) or absolute (0).
+# Note that there is necessarily no information available as to what cell(s)
+# the reference could possibly be relative to. The caller must decide what if
+# any use to make of oREL operands. Note also that a partially relative
+# reference may well be a typo.
+# For example, define name A1Z10 as $a$1:$z10 (missing $ after z)
+# while the cursor is on cell Sheet3!A27.<br>
+# The resulting Ref3D instance will have coords = (2, 3, 0, -16, 0, 26)
+# and relflags = (0, 0, 0, 1, 0, 0).<br>
+# So far, only one possibility of a sheet-relative component in
+# a reference has been noticed: a 2D reference located in the "current sheet".
+# This will appear as coords = (0, 1, ...) and relflags = (1, 1, ...).
+
+class Ref3D(tuple):
+
+    def __init__(self, atuple):
+        self.coords = atuple[0:6]
+        self.relflags = atuple[6:12]
+        if not self.relflags:
+            self.relflags = (0, 0, 0, 0, 0, 0)
+        (self.shtxlo, self.shtxhi,
+        self.rowxlo, self.rowxhi,
+        self.colxlo, self.colxhi) = self.coords
+
+    def __repr__(self):
+        if not self.relflags or self.relflags == (0, 0, 0, 0, 0, 0):
+            return "Ref3D(coords=%r)" % (self.coords, )
+        else:
+            return "Ref3D(coords=%r, relflags=%r)" \
+                % (self.coords, self.relflags)
+
+tAdd = 0x03
+tSub = 0x04
+tMul = 0x05
+tDiv = 0x06
+tPower = 0x07
+tConcat = 0x08
+tLT, tLE, tEQ, tGE, tGT, tNE = list(range(0x09, 0x0F))
+
+import operator as opr
+
+def nop(x):
+    return x
+
+def _opr_pow(x, y): return x ** y
+
+def _opr_lt(x, y): return x <  y
+def _opr_le(x, y): return x <= y
+def _opr_eq(x, y): return x == y
+def _opr_ge(x, y): return x >= y
+def _opr_gt(x, y): return x >  y
+def _opr_ne(x, y): return x != y
+
+def num2strg(num):
+    """Attempt to emulate Excel's default conversion
+       from number to string.
+    """
+    s = str(num)
+    if s.endswith(".0"):
+        s = s[:-2]
+    return s
+
+_arith_argdict = {oNUM: nop,     oSTRG: float}
+_cmp_argdict =   {oNUM: nop,     oSTRG: nop}
+# Seems no conversions done on relops; in Excel, "1" > 9 produces TRUE.
+_strg_argdict =  {oNUM:num2strg, oSTRG:nop}
+binop_rules = {
+    tAdd:   (_arith_argdict, oNUM, opr.add,  30, '+'),
+    tSub:   (_arith_argdict, oNUM, opr.sub,  30, '-'),
+    tMul:   (_arith_argdict, oNUM, opr.mul,  40, '*'),
+    tDiv:   (_arith_argdict, oNUM, opr.truediv,  40, '/'),
+    tPower: (_arith_argdict, oNUM, _opr_pow, 50, '^',),
+    tConcat:(_strg_argdict, oSTRG, opr.add,  20, '&'),
+    tLT:    (_cmp_argdict, oBOOL, _opr_lt,   10, '<'),
+    tLE:    (_cmp_argdict, oBOOL, _opr_le,   10, '<='),
+    tEQ:    (_cmp_argdict, oBOOL, _opr_eq,   10, '='),
+    tGE:    (_cmp_argdict, oBOOL, _opr_ge,   10, '>='),
+    tGT:    (_cmp_argdict, oBOOL, _opr_gt,   10, '>'),
+    tNE:    (_cmp_argdict, oBOOL, _opr_ne,   10, '<>'),
+    }
+
+unop_rules = {
+    0x13: (lambda x: -x,        70, '-', ''), # unary minus
+    0x12: (lambda x: x,         70, '+', ''), # unary plus
+    0x14: (lambda x: x / 100.0, 60, '',  '%'),# percent
+    }
+
+LEAF_RANK = 90
+FUNC_RANK = 90
+
+STACK_ALARM_LEVEL = 5
+STACK_PANIC_LEVEL = 10
+
+def evaluate_name_formula(bk, nobj, namex, verbose=0, level=0):
+    if level > STACK_ALARM_LEVEL:
+        verbose = 1
+    data = nobj.raw_formula
+    fmlalen = nobj.basic_formula_len
+    bv = bk.biff_version
+    reldelta = 1 # All defined name formulas use "Method B" [OOo docs]
+    if verbose:
+        print("::: evaluate_name_formula %r %r %d %d %r level=%d" \
+            % (namex, nobj.name, fmlalen, bv, data, level))
+        hex_char_dump(data, 0, fmlalen)
+    if level > STACK_PANIC_LEVEL:
+        raise XLRDError("Excessive indirect references in NAME formula")
+    sztab = szdict[bv]
+    pos = 0
+    stack = []
+    any_rel = 0
+    any_err = 0
+    any_external = 0
+    unk_opnd = Operand(oUNK, None)
+    error_opnd = Operand(oERR, None)
+    spush = stack.append
+
+    def do_binop(opcd, stk):
+        assert len(stk) >= 2
+        bop = stk.pop()
+        aop = stk.pop()
+        argdict, result_kind, func, rank, sym = binop_rules[opcd]
+        otext = ''.join([
+            '('[:aop.rank < rank],
+            aop.text,
+            ')'[:aop.rank < rank],
+            sym,
+            '('[:bop.rank < rank],
+            bop.text,
+            ')'[:bop.rank < rank],
+            ])
+        resop = Operand(result_kind, None, rank, otext)
+        try:
+            bconv = argdict[bop.kind]
+            aconv = argdict[aop.kind]
+        except KeyError:
+            stk.append(resop)
+            return
+        if bop.value is None or aop.value is None:
+            stk.append(resop)
+            return
+        bval = bconv(bop.value)
+        aval = aconv(aop.value)
+        result = func(aval, bval)
+        if result_kind == oBOOL:
+            result = 1 if result else 0 # (to_py3)
+        resop.value = result
+        stk.append(resop)
+
+    def do_unaryop(opcode, arglist, result_kind, stk):
+        assert len(stk) >= 1
+        aop = stk.pop()
+        assert aop.kind in arglist
+        val = aop.value
+        func, rank, sym1, sym2 = unop_rules[opcode]
+        otext = ''.join([
+            sym1,
+            '('[:aop.rank < rank],
+            aop.text,
+            ')'[:aop.rank < rank],
+            sym2,
+            ])
+        if val is not None:
+            val = func(val)
+        stk.append(Operand(result_kind, val, rank, otext))
+
+    def not_in_name_formula(op_arg, oname_arg):
+        msg = "ERROR *** Token 0x%02x (%s) found in NAME formula" \
+              % (op_arg, oname_arg)
+        raise FormulaError(msg)
+
+    if fmlalen == 0:
+        stack = [unk_opnd]
+
+    while 0 <= pos < fmlalen:
+        op = data[pos]
+        opcode = op & 0x1f
+        optype = (op & 0x60) >> 5
+        if optype:
+            opx = opcode + 32
+        else:
+            opx = opcode
+        oname = onames[opx] # + [" RVA"][optype]
+        sz = sztab[opx]
+        if verbose:
+            print("Pos:%d Op:0x%02x Name:t%s Sz:%d opcode:%02xh optype:%02xh" \
+                % (pos, op, oname, sz, opcode, optype))
+            print("Stack =", stack)
+        if sz == -2:
+            msg = 'ERROR *** Unexpected token 0x%02x ("%s"); biff_version=%d' \
+                % (op, oname, bv)
+            raise FormulaError(msg)
+        if not optype:
+            if 0x00 <= opcode <= 0x02: # unk_opnd, tExp, tTbl
+                not_in_name_formula(op, oname)
+            elif 0x03 <= opcode <= 0x0E:
+                # Add, Sub, Mul, Div, Power
+                # tConcat
+                # tLT, ..., tNE
+                do_binop(opcode, stack)
+            elif opcode == 0x0F: # tIsect
+                if verbose: print("tIsect pre", stack, file=bk.logfile)
+                assert len(stack) >= 2
+                bop = stack.pop()
+                aop = stack.pop()
+                sym = ' '
+                rank = 80 ########## check #######
+                otext = ''.join([
+                    '('[:aop.rank < rank],
+                    aop.text,
+                    ')'[:aop.rank < rank],
+                    sym,
+                    '('[:bop.rank < rank],
+                    bop.text,
+                    ')'[:bop.rank < rank],
+                    ])
+                res = Operand(oREF)
+                res.text = otext
+                if bop.kind == oERR or aop.kind == oERR:
+                    res.kind = oERR
+                elif bop.kind == oUNK or aop.kind == oUNK:
+                    # This can happen with undefined
+                    # (go search in the current sheet) labels.
+                    # For example =Bob Sales
+                    # Each label gets a NAME record with an empty formula (!)
+                    # Evaluation of the tName token classifies it as oUNK
+                    # res.kind = oREF
+                    pass
+                elif bop.kind == oREF == aop.kind:
+                    if aop.value is not None and bop.value is not None:
+                        assert len(aop.value) == 1
+                        assert len(bop.value) == 1
+                        coords = do_box_funcs(
+                            tIsectFuncs, aop.value[0], bop.value[0])
+                        res.value = [Ref3D(coords)]
+                elif bop.kind == oREL == aop.kind:
+                    res.kind = oREL
+                    if aop.value is not None and bop.value is not None:
+                        assert len(aop.value) == 1
+                        assert len(bop.value) == 1
+                        coords = do_box_funcs(
+                            tIsectFuncs, aop.value[0], bop.value[0])
+                        relfa = aop.value[0].relflags
+                        relfb = bop.value[0].relflags
+                        if relfa == relfb:
+                            res.value = [Ref3D(coords + relfa)]
+                else:
+                    pass
+                spush(res)
+                if verbose: print("tIsect post", stack, file=bk.logfile)
+            elif opcode == 0x10: # tList
+                if verbose: print("tList pre", stack, file=bk.logfile)
+                assert len(stack) >= 2
+                bop = stack.pop()
+                aop = stack.pop()
+                sym = ','
+                rank = 80 ########## check #######
+                otext = ''.join([
+                    '('[:aop.rank < rank],
+                    aop.text,
+                    ')'[:aop.rank < rank],
+                    sym,
+                    '('[:bop.rank < rank],
+                    bop.text,
+                    ')'[:bop.rank < rank],
+                    ])
+                res = Operand(oREF, None, rank, otext)
+                if bop.kind == oERR or aop.kind == oERR:
+                    res.kind = oERR
+                elif bop.kind in (oREF, oREL) and aop.kind in (oREF, oREL):
+                    res.kind = oREF
+                    if aop.kind == oREL or bop.kind == oREL:
+                        res.kind = oREL
+                    if aop.value is not None and bop.value is not None:
+                        assert len(aop.value) >= 1
+                        assert len(bop.value) == 1
+                        res.value = aop.value + bop.value
+                else:
+                    pass
+                spush(res)
+                if verbose: print("tList post", stack, file=bk.logfile)
+            elif opcode == 0x11: # tRange
+                if verbose: print("tRange pre", stack, file=bk.logfile)
+                assert len(stack) >= 2
+                bop = stack.pop()
+                aop = stack.pop()
+                sym = ':'
+                rank = 80 ########## check #######
+                otext = ''.join([
+                    '('[:aop.rank < rank],
+                    aop.text,
+                    ')'[:aop.rank < rank],
+                    sym,
+                    '('[:bop.rank < rank],
+                    bop.text,
+                    ')'[:bop.rank < rank],
+                    ])
+                res = Operand(oREF, None, rank, otext)
+                if bop.kind == oERR or aop.kind == oERR:
+                    res = oERR
+                elif bop.kind == oREF == aop.kind:
+                    if aop.value is not None and bop.value is not None:
+                        assert len(aop.value) == 1
+                        assert len(bop.value) == 1
+                        coords = do_box_funcs(
+                            tRangeFuncs, aop.value[0], bop.value[0])
+                        res.value = [Ref3D(coords)]
+                elif bop.kind == oREL == aop.kind:
+                    res.kind = oREL
+                    if aop.value is not None and bop.value is not None:
+                        assert len(aop.value) == 1
+                        assert len(bop.value) == 1
+                        coords = do_box_funcs(
+                            tRangeFuncs, aop.value[0], bop.value[0])
+                        relfa = aop.value[0].relflags
+                        relfb = bop.value[0].relflags
+                        if relfa == relfb:
+                            res.value = [Ref3D(coords + relfa)]
+                else:
+                    pass
+                spush(res)
+                if verbose: print("tRange post", stack, file=bk.logfile)
+            elif 0x12 <= opcode <= 0x14: # tUplus, tUminus, tPercent
+                do_unaryop(opcode, (oUNK, oNUM,), oNUM, stack)
+            elif opcode == 0x15: # tParen
+                # source cosmetics
+                pass
+            elif opcode == 0x16: # tMissArg
+                spush(Operand(oMSNG, None, LEAF_RANK, ''))
+            elif opcode == 0x17: # tStr
+                if bv <= 70:
+                    strg, newpos = unpack_string_update_pos(
+                                        data, pos+1, bk.encoding, lenlen=1)
+                else:
+                    strg, newpos = unpack_unicode_update_pos(
+                                        data, pos+1, lenlen=1)
+                sz = newpos - pos
+                if verbose: print("   sz=%d strg=%r" % (sz, strg), file=bk.logfile)
+                text = '"' + strg.replace('"', '""') + '"'
+                spush(Operand(oSTRG, strg, LEAF_RANK, text))
+            elif opcode == 0x18: # tExtended
+                # new with BIFF 8
+                assert bv >= 80
+                # not in OOo docs
+                raise FormulaError("tExtended token not implemented")
+            elif opcode == 0x19: # tAttr
+                subop, nc = unpack("<BH", data[pos+1:pos+4])
+                subname = tAttrNames.get(subop, "??Unknown??")
+                if subop == 0x04: # Choose
+                    sz = nc * 2 + 6
+                elif subop == 0x10: # Sum (single arg)
+                    sz = 4
+                    if verbose: print("tAttrSum", stack, file=bk.logfile)
+                    assert len(stack) >= 1
+                    aop = stack[-1]
+                    otext = 'SUM(%s)' % aop.text
+                    stack[-1] = Operand(oNUM, None, FUNC_RANK, otext)
+                else:
+                    sz = 4
+                if verbose:
+                    print("   subop=%02xh subname=t%s sz=%d nc=%02xh" \
+                        % (subop, subname, sz, nc))
+            elif 0x1A <= opcode <= 0x1B: # tSheet, tEndSheet
+                assert bv < 50
+                raise FormulaError("tSheet & tEndsheet tokens not implemented")
+            elif 0x1C <= opcode <= 0x1F: # tErr, tBool, tInt, tNum
+                inx = opcode - 0x1C
+                nb = [1, 1, 2, 8][inx]
+                kind = [oERR, oBOOL, oNUM, oNUM][inx]
+                value, = unpack("<" + "BBHd"[inx], data[pos+1:pos+1+nb])
+                if inx == 2: # tInt
+                    value = float(value)
+                    text = str(value)
+                elif inx == 3: # tNum
+                    text = str(value)
+                elif inx == 1: # tBool
+                    text = ('FALSE', 'TRUE')[value]
+                else:
+                    text = '"' +error_text_from_code[value] + '"'
+                spush(Operand(kind, value, LEAF_RANK, text))
+            else:
+                raise FormulaError("Unhandled opcode: 0x%02x" % opcode)
+            if sz <= 0:
+                raise FormulaError("Size not set for opcode 0x%02x" % opcode)
+            pos += sz
+            continue
+        if opcode == 0x00: # tArray
+            spush(unk_opnd)
+        elif opcode == 0x01: # tFunc
+            nb = 1 + int(bv >= 40)
+            funcx = unpack("<" + " BH"[nb], data[pos+1:pos+1+nb])[0]
+            func_attrs = func_defs.get(funcx, None)
+            if not func_attrs:
+                print("*** formula/tFunc unknown FuncID:%d" \
+                      % funcx, file=bk.logfile)
+                spush(unk_opnd)
+            else:
+                func_name, nargs = func_attrs[:2]
+                if verbose:
+                    print("    FuncID=%d name=%s nargs=%d" \
+                          % (funcx, func_name, nargs))
+                assert len(stack) >= nargs
+                argtext = listsep.join([arg.text for arg in stack[-nargs:]])
+                otext = "%s(%s)" % (func_name, argtext)
+                del stack[-nargs:]
+                res = Operand(oUNK, None, FUNC_RANK, otext)
+                spush(res)
+        elif opcode == 0x02: #tFuncVar
+            nb = 1 + int(bv >= 40)
+            nargs, funcx = unpack("<B" + " BH"[nb], data[pos+1:pos+2+nb])
+            prompt, nargs = divmod(nargs, 128)
+            macro, funcx = divmod(funcx, 32768)
+            if verbose:
+                print("   FuncID=%d nargs=%d macro=%d prompt=%d" \
+                      % (funcx, nargs, macro, prompt))
+            func_attrs = func_defs.get(funcx, None)
+            if not func_attrs:
+                print("*** formula/tFuncVar unknown FuncID:%d" \
+                      % funcx, file=bk.logfile)
+                spush(unk_opnd)
+            else:
+                func_name, minargs, maxargs = func_attrs[:3]
+                if verbose:
+                    print("    name: %r, min~max args: %d~%d" \
+                        % (func_name, minargs, maxargs))
+                assert minargs <= nargs <= maxargs
+                assert len(stack) >= nargs
+                assert len(stack) >= nargs
+                argtext = listsep.join([arg.text for arg in stack[-nargs:]])
+                otext = "%s(%s)" % (func_name, argtext)
+                res = Operand(oUNK, None, FUNC_RANK, otext)
+                if funcx == 1: # IF
+                    testarg = stack[-nargs]
+                    if testarg.kind not in (oNUM, oBOOL):
+                        if verbose and testarg.kind != oUNK:
+                            print("IF testarg kind?")
+                    elif testarg.value not in (0, 1):
+                        if verbose and testarg.value is not None:
+                            print("IF testarg value?")
+                    else:
+                        if nargs == 2 and not testarg.value:
+                            # IF(FALSE, tv) => FALSE
+                            res.kind, res.value = oBOOL, 0
+                        else:
+                            respos = -nargs + 2 - int(testarg.value)
+                            chosen = stack[respos]
+                            if chosen.kind == oMSNG:
+                                res.kind, res.value = oNUM, 0
+                            else:
+                                res.kind, res.value = chosen.kind, chosen.value
+                        if verbose:
+                            print("$$$$$$ IF => constant")
+                elif funcx == 100: # CHOOSE
+                    testarg = stack[-nargs]
+                    if testarg.kind == oNUM:
+                        if 1 <= testarg.value < nargs:
+                            chosen = stack[-nargs + int(testarg.value)]
+                            if chosen.kind == oMSNG:
+                                res.kind, res.value = oNUM, 0
+                            else:
+                                res.kind, res.value = chosen.kind, chosen.value
+                del stack[-nargs:]
+                spush(res)
+        elif opcode == 0x03: #tName
+            tgtnamex = unpack("<H", data[pos+1:pos+3])[0] - 1
+            # Only change with BIFF version is number of trailing UNUSED bytes!
+            if verbose: print("   tgtnamex=%d" % tgtnamex, file=bk.logfile)
+            tgtobj = bk.name_obj_list[tgtnamex]
+            if not tgtobj.evaluated:
+                ### recursive ###
+                evaluate_name_formula(bk, tgtobj, tgtnamex, verbose, level+1)
+            if tgtobj.macro or tgtobj.binary \
+            or tgtobj.any_err:
+                if verbose:
+                    tgtobj.dump(
+                        bk.logfile,
+                        header="!!! tgtobj has problems!!!",
+                        footer="-----------       --------",
+                        )
+                res = Operand(oUNK, None)
+                any_err = any_err or tgtobj.macro or tgtobj.binary or tgtobj.any_err
+                any_rel = any_rel or tgtobj.any_rel
+            else:
+                assert len(tgtobj.stack) == 1
+                res = copy.deepcopy(tgtobj.stack[0])
+            res.rank = LEAF_RANK
+            if tgtobj.scope == -1:
+                res.text = tgtobj.name
+            else:
+                res.text = "%s!%s" \
+                           % (bk._sheet_names[tgtobj.scope], tgtobj.name)
+            if verbose:
+                print("    tName: setting text to", repr(res.text), file=bk.logfile)
+            spush(res)
+        elif opcode == 0x04: # tRef
+            # not_in_name_formula(op, oname)
+            res = get_cell_addr(data, pos+1, bv, reldelta)
+            if verbose: print("  ", res, file=bk.logfile)
+            rowx, colx, row_rel, col_rel = res
+            shx1 = shx2 = 0 ####### N.B. relative to the CURRENT SHEET
+            any_rel = 1
+            coords = (shx1, shx2+1, rowx, rowx+1, colx, colx+1)
+            if verbose: print("   ", coords, file=bk.logfile)
+            res = Operand(oUNK, None)
+            if optype == 1:
+                relflags = (1, 1, row_rel, row_rel, col_rel, col_rel)
+                res = Operand(oREL, [Ref3D(coords + relflags)])
+            spush(res)
+        elif opcode == 0x05: # tArea
+            # not_in_name_formula(op, oname)
+            res1, res2 = get_cell_range_addr(data, pos+1, bv, reldelta)
+            if verbose: print("  ", res1, res2, file=bk.logfile)
+            rowx1, colx1, row_rel1, col_rel1 = res1
+            rowx2, colx2, row_rel2, col_rel2 = res2
+            shx1 = shx2 = 0 ####### N.B. relative to the CURRENT SHEET
+            any_rel = 1
+            coords = (shx1, shx2+1, rowx1, rowx2+1, colx1, colx2+1)
+            if verbose: print("   ", coords, file=bk.logfile)
+            res = Operand(oUNK, None)
+            if optype == 1:
+                relflags = (1, 1, row_rel1, row_rel2, col_rel1, col_rel2)
+                res = Operand(oREL, [Ref3D(coords + relflags)])
+            spush(res)
+        elif opcode == 0x06: # tMemArea
+            not_in_name_formula(op, oname)
+        elif opcode == 0x09: # tMemFunc
+            nb = unpack("<H", data[pos+1:pos+3])[0]
+            if verbose: print("  %d bytes of cell ref formula" % nb, file=bk.logfile)
+            # no effect on stack
+        elif opcode == 0x0C: #tRefN
+            not_in_name_formula(op, oname)
+            # res = get_cell_addr(data, pos+1, bv, reldelta=1)
+            # # note *ALL* tRefN usage has signed offset for relative addresses
+            # any_rel = 1
+            # if verbose: print >> bk.logfile, "   ", res
+            # spush(res)
+        elif opcode == 0x0D: #tAreaN
+            not_in_name_formula(op, oname)
+            # res = get_cell_range_addr(data, pos+1, bv, reldelta=1)
+            # # note *ALL* tAreaN usage has signed offset for relative addresses
+            # any_rel = 1
+            # if verbose: print >> bk.logfile, "   ", res
+        elif opcode == 0x1A: # tRef3d
+            if bv >= 80:
+                res = get_cell_addr(data, pos+3, bv, reldelta)
+                refx = unpack("<H", data[pos+1:pos+3])[0]
+                shx1, shx2 = get_externsheet_local_range(bk, refx, verbose)
+            else:
+                res = get_cell_addr(data, pos+15, bv, reldelta)
+                raw_extshtx, raw_shx1, raw_shx2 = \
+                             unpack("<hxxxxxxxxhh", data[pos+1:pos+15])
+                if verbose:
+                    print("tRef3d", raw_extshtx, raw_shx1, raw_shx2, file=bk.logfile)
+                shx1, shx2 = get_externsheet_local_range_b57(
+                                bk, raw_extshtx, raw_shx1, raw_shx2, verbose)
+            rowx, colx, row_rel, col_rel = res
+            is_rel = row_rel or col_rel
+            any_rel = any_rel or is_rel
+            coords = (shx1, shx2+1, rowx, rowx+1, colx, colx+1)
+            any_err |= shx1 < -1
+            if verbose: print("   ", coords, file=bk.logfile)
+            res = Operand(oUNK, None)
+            if is_rel:
+                relflags = (0, 0, row_rel, row_rel, col_rel, col_rel)
+                ref3d = Ref3D(coords + relflags)
+                res.kind = oREL
+                res.text = rangename3drel(bk, ref3d)
+            else:
+                ref3d = Ref3D(coords)
+                res.kind = oREF
+                res.text = rangename3d(bk, ref3d)
+            res.rank = LEAF_RANK
+            if optype == 1:
+                res.value = [ref3d]
+            spush(res)
+        elif opcode == 0x1B: # tArea3d
+            if bv >= 80:
+                res1, res2 = get_cell_range_addr(data, pos+3, bv, reldelta)
+                refx = unpack("<H", data[pos+1:pos+3])[0]
+                shx1, shx2 = get_externsheet_local_range(bk, refx, verbose)
+            else:
+                res1, res2 = get_cell_range_addr(data, pos+15, bv, reldelta)
+                raw_extshtx, raw_shx1, raw_shx2 = \
+                             unpack("<hxxxxxxxxhh", data[pos+1:pos+15])
+                if verbose:
+                    print("tArea3d", raw_extshtx, raw_shx1, raw_shx2, file=bk.logfile)
+                shx1, shx2 = get_externsheet_local_range_b57(
+                                bk, raw_extshtx, raw_shx1, raw_shx2, verbose)
+            any_err |= shx1 < -1
+            rowx1, colx1, row_rel1, col_rel1 = res1
+            rowx2, colx2, row_rel2, col_rel2 = res2
+            is_rel = row_rel1 or col_rel1 or row_rel2 or col_rel2
+            any_rel = any_rel or is_rel
+            coords = (shx1, shx2+1, rowx1, rowx2+1, colx1, colx2+1)
+            if verbose: print("   ", coords, file=bk.logfile)
+            res = Operand(oUNK, None)
+            if is_rel:
+                relflags = (0, 0, row_rel1, row_rel2, col_rel1, col_rel2)
+                ref3d = Ref3D(coords + relflags)
+                res.kind = oREL
+                res.text = rangename3drel(bk, ref3d)
+            else:
+                ref3d = Ref3D(coords)
+                res.kind = oREF
+                res.text = rangename3d(bk, ref3d)
+            res.rank = LEAF_RANK
+            if optype == 1:
+                res.value = [ref3d]
+
+            spush(res)
+        elif opcode == 0x19: # tNameX
+            dodgy = 0
+            res = Operand(oUNK, None)
+            if bv >= 80:
+                refx, tgtnamex = unpack("<HH", data[pos+1:pos+5])
+                tgtnamex -= 1
+                origrefx = refx
+            else:
+                refx, tgtnamex = unpack("<hxxxxxxxxH", data[pos+1:pos+13])
+                tgtnamex -= 1
+                origrefx = refx
+                if refx > 0:
+                    refx -= 1
+                elif refx < 0:
+                    refx = -refx - 1
+                else:
+                    dodgy = 1
+            if verbose:
+                print("   origrefx=%d refx=%d tgtnamex=%d dodgy=%d" \
+                    % (origrefx, refx, tgtnamex, dodgy), file=bk.logfile)
+            if tgtnamex == namex:
+                if verbose: print("!!!! Self-referential !!!!", file=bk.logfile)
+                dodgy = any_err = 1
+            if not dodgy:
+                if bv >= 80:
+                    shx1, shx2 = get_externsheet_local_range(bk, refx, verbose)
+                elif origrefx > 0:
+                    shx1, shx2 = (-4, -4) # external ref
+                else:
+                    exty = bk._externsheet_type_b57[refx]
+                    if exty == 4: # non-specific sheet in own doc't
+                        shx1, shx2 = (-1, -1) # internal, any sheet
+                    else:
+                        shx1, shx2 = (-666, -666)
+            if dodgy or shx1 < -1:
+                otext = "<<Name #%d in external(?) file #%d>>" \
+                        % (tgtnamex, origrefx)
+                res = Operand(oUNK, None, LEAF_RANK, otext)
+            else:
+                tgtobj = bk.name_obj_list[tgtnamex]
+                if not tgtobj.evaluated:
+                    ### recursive ###
+                    evaluate_name_formula(bk, tgtobj, tgtnamex, verbose, level+1)
+                if tgtobj.macro or tgtobj.binary \
+                or tgtobj.any_err:
+                    if verbose:
+                        tgtobj.dump(
+                            bk.logfile,
+                            header="!!! bad tgtobj !!!",
+                            footer="------------------",
+                            )
+                    res = Operand(oUNK, None)
+                    any_err = any_err or tgtobj.macro or tgtobj.binary or tgtobj.any_err
+                    any_rel = any_rel or tgtobj.any_rel
+                else:
+                    assert len(tgtobj.stack) == 1
+                    res = copy.deepcopy(tgtobj.stack[0])
+                res.rank = LEAF_RANK
+                if tgtobj.scope == -1:
+                    res.text = tgtobj.name
+                else:
+                    res.text = "%s!%s" \
+                               % (bk._sheet_names[tgtobj.scope], tgtobj.name)
+                if verbose:
+                    print("    tNameX: setting text to", repr(res.text), file=bk.logfile)
+            spush(res)
+        elif opcode in _error_opcodes:
+            any_err = 1
+            spush(error_opnd)
+        else:
+            if verbose:
+                print("FORMULA: /// Not handled yet: t" + oname, file=bk.logfile)
+            any_err = 1
+        if sz <= 0:
+            raise FormulaError("Fatal: token size is not positive")
+        pos += sz
+    any_rel = not not any_rel
+    if verbose:
+        print("End of formula. level=%d any_rel=%d any_err=%d stack=%r" % \
+            (level, not not any_rel, any_err, stack))
+        if len(stack) >= 2:
+            print("*** Stack has unprocessed args")
+        print()
+    nobj.stack = stack
+    if len(stack) != 1:
+        nobj.result = None
+    else:
+        nobj.result = stack[0]
+    nobj.any_rel = any_rel
+    nobj.any_err = any_err
+    nobj.any_external = any_external
+    nobj.evaluated = 1
+
+#### under construction ####
+def decompile_formula(bk, fmla, fmlalen,
+    reldelta, browx=None, bcolx=None,
+    # browx & bcolx are required when reldelta == 0
+    verbose=0, level=0):
+    if level > STACK_ALARM_LEVEL:
+        verbose = 1
+    data = fmla
+    bv = bk.biff_version
+    if verbose:
+        print("::: decompile_formula len=%d reldelta=%d %r level=%d" \
+            % (fmlalen, reldelta, data, level))
+        hex_char_dump(data, 0, fmlalen)
+    if level > STACK_PANIC_LEVEL:
+        raise XLRDError("Excessive indirect references in formula")
+    sztab = szdict[bv]
+    pos = 0
+    stack = []
+    any_rel = 0
+    any_err = 0
+    any_external = 0
+    unk_opnd = Operand(oUNK, None)
+    error_opnd = Operand(oERR, None)
+    spush = stack.append
+
+    def do_binop(opcd, stk):
+        assert len(stk) >= 2
+        bop = stk.pop()
+        aop = stk.pop()
+        argdict, result_kind, func, rank, sym = binop_rules[opcd]
+        otext = ''.join([
+            '('[:aop.rank < rank],
+            aop.text,
+            ')'[:aop.rank < rank],
+            sym,
+            '('[:bop.rank < rank],
+            bop.text,
+            ')'[:bop.rank < rank],
+            ])
+        resop = Operand(result_kind, None, rank, otext)
+        stk.append(resop)
+
+    def do_unaryop(opcode, arglist, result_kind, stk):
+        assert len(stk) >= 1
+        aop = stk.pop()
+        assert aop.kind in arglist
+        func, rank, sym1, sym2 = unop_rules[opcode]
+        otext = ''.join([
+            sym1,
+            '('[:aop.rank < rank],
+            aop.text,
+            ')'[:aop.rank < rank],
+            sym2,
+            ])
+        stk.append(Operand(result_kind, None, rank, otext))
+
+    def not_in_name_formula(op_arg, oname_arg):
+        msg = "ERROR *** Unexpected token 0x%02x (%s) found in formula" \
+              % (op_arg, oname_arg)
+        # print msg
+        raise FormulaError(msg)
+
+    if fmlalen == 0:
+        stack = [unk_opnd]
+
+    while 0 <= pos < fmlalen:
+        op = data[pos]
+        opcode = op & 0x1f
+        optype = (op & 0x60) >> 5
+        if optype:
+            opx = opcode + 32
+        else:
+            opx = opcode
+        oname = onames[opx] # + [" RVA"][optype]
+        sz = sztab[opx]
+        if verbose:
+            print("Pos:%d Op:0x%02x opname:t%s Sz:%d opcode:%02xh optype:%02xh" \
+                % (pos, op, oname, sz, opcode, optype))
+            print("Stack =", stack)
+        if sz == -2:
+            msg = 'ERROR *** Unexpected token 0x%02x ("%s"); biff_version=%d' \
+                % (op, oname, bv)
+            raise FormulaError(msg)
+        if not optype:
+            if 0x00 <= opcode <= 0x02: # unk_opnd, tExp, tTbl
+                not_in_name_formula(op, oname)
+            elif 0x03 <= opcode <= 0x0E:
+                # Add, Sub, Mul, Div, Power
+                # tConcat
+                # tLT, ..., tNE
+                do_binop(opcode, stack)
+            elif opcode == 0x0F: # tIsect
+                if verbose: print("tIsect pre", stack, file=bk.logfile)
+                assert len(stack) >= 2
+                bop = stack.pop()
+                aop = stack.pop()
+                sym = ' '
+                rank = 80 ########## check #######
+                otext = ''.join([
+                    '('[:aop.rank < rank],
+                    aop.text,
+                    ')'[:aop.rank < rank],
+                    sym,
+                    '('[:bop.rank < rank],
+                    bop.text,
+                    ')'[:bop.rank < rank],
+                    ])
+                res = Operand(oREF)
+                res.text = otext
+                if bop.kind == oERR or aop.kind == oERR:
+                    res.kind = oERR
+                elif bop.kind == oUNK or aop.kind == oUNK:
+                    # This can happen with undefined
+                    # (go search in the current sheet) labels.
+                    # For example =Bob Sales
+                    # Each label gets a NAME record with an empty formula (!)
+                    # Evaluation of the tName token classifies it as oUNK
+                    # res.kind = oREF
+                    pass
+                elif bop.kind == oREF == aop.kind:
+                    pass
+                elif bop.kind == oREL == aop.kind:
+                    res.kind = oREL
+                else:
+                    pass
+                spush(res)
+                if verbose: print("tIsect post", stack, file=bk.logfile)
+            elif opcode == 0x10: # tList
+                if verbose: print("tList pre", stack, file=bk.logfile)
+                assert len(stack) >= 2
+                bop = stack.pop()
+                aop = stack.pop()
+                sym = ','
+                rank = 80 ########## check #######
+                otext = ''.join([
+                    '('[:aop.rank < rank],
+                    aop.text,
+                    ')'[:aop.rank < rank],
+                    sym,
+                    '('[:bop.rank < rank],
+                    bop.text,
+                    ')'[:bop.rank < rank],
+                    ])
+                res = Operand(oREF, None, rank, otext)
+                if bop.kind == oERR or aop.kind == oERR:
+                    res.kind = oERR
+                elif bop.kind in (oREF, oREL) and aop.kind in (oREF, oREL):
+                    res.kind = oREF
+                    if aop.kind == oREL or bop.kind == oREL:
+                        res.kind = oREL
+                else:
+                    pass
+                spush(res)
+                if verbose: print("tList post", stack, file=bk.logfile)
+            elif opcode == 0x11: # tRange
+                if verbose: print("tRange pre", stack, file=bk.logfile)
+                assert len(stack) >= 2
+                bop = stack.pop()
+                aop = stack.pop()
+                sym = ':'
+                rank = 80 ########## check #######
+                otext = ''.join([
+                    '('[:aop.rank < rank],
+                    aop.text,
+                    ')'[:aop.rank < rank],
+                    sym,
+                    '('[:bop.rank < rank],
+                    bop.text,
+                    ')'[:bop.rank < rank],
+                    ])
+                res = Operand(oREF, None, rank, otext)
+                if bop.kind == oERR or aop.kind == oERR:
+                    res = oERR
+                elif bop.kind == oREF == aop.kind:
+                    pass
+                else:
+                    pass
+                spush(res)
+                if verbose: print("tRange post", stack, file=bk.logfile)
+            elif 0x12 <= opcode <= 0x14: # tUplus, tUminus, tPercent
+                do_unaryop(opcode, (oUNK, oNUM,), oNUM, stack)
+            elif opcode == 0x15: # tParen
+                # source cosmetics
+                pass
+            elif opcode == 0x16: # tMissArg
+                spush(Operand(oMSNG, None, LEAF_RANK, ''))
+            elif opcode == 0x17: # tStr
+                if bv <= 70:
+                    strg, newpos = unpack_string_update_pos(
+                                        data, pos+1, bk.encoding, lenlen=1)
+                else:
+                    strg, newpos = unpack_unicode_update_pos(
+                                        data, pos+1, lenlen=1)
+                sz = newpos - pos
+                if verbose: print("   sz=%d strg=%r" % (sz, strg), file=bk.logfile)
+                text = '"' + strg.replace('"', '""') + '"'
+                spush(Operand(oSTRG, None, LEAF_RANK, text))
+            elif opcode == 0x18: # tExtended
+                # new with BIFF 8
+                assert bv >= 80
+                # not in OOo docs
+                raise FormulaError("tExtended token not implemented")
+            elif opcode == 0x19: # tAttr
+                subop, nc = unpack("<BH", data[pos+1:pos+4])
+                subname = tAttrNames.get(subop, "??Unknown??")
+                if subop == 0x04: # Choose
+                    sz = nc * 2 + 6
+                elif subop == 0x10: # Sum (single arg)
+                    sz = 4
+                    if verbose: print("tAttrSum", stack, file=bk.logfile)
+                    assert len(stack) >= 1
+                    aop = stack[-1]
+                    otext = 'SUM(%s)' % aop.text
+                    stack[-1] = Operand(oNUM, None, FUNC_RANK, otext)
+                else:
+                    sz = 4
+                if verbose:
+                    print("   subop=%02xh subname=t%s sz=%d nc=%02xh" \
+                        % (subop, subname, sz, nc))
+            elif 0x1A <= opcode <= 0x1B: # tSheet, tEndSheet
+                assert bv < 50
+                raise FormulaError("tSheet & tEndsheet tokens not implemented")
+            elif 0x1C <= opcode <= 0x1F: # tErr, tBool, tInt, tNum
+                inx = opcode - 0x1C
+                nb = [1, 1, 2, 8][inx]
+                kind = [oERR, oBOOL, oNUM, oNUM][inx]
+                value, = unpack("<" + "BBHd"[inx], data[pos+1:pos+1+nb])
+                if inx == 2: # tInt
+                    value = float(value)
+                    text = str(value)
+                elif inx == 3: # tNum
+                    text = str(value)
+                elif inx == 1: # tBool
+                    text = ('FALSE', 'TRUE')[value]
+                else:
+                    text = '"' +error_text_from_code[value] + '"'
+                spush(Operand(kind, None, LEAF_RANK, text))
+            else:
+                raise FormulaError("Unhandled opcode: 0x%02x" % opcode)
+            if sz <= 0:
+                raise FormulaError("Size not set for opcode 0x%02x" % opcode)
+            pos += sz
+            continue
+        if opcode == 0x00: # tArray
+            spush(unk_opnd)
+        elif opcode == 0x01: # tFunc
+            nb = 1 + int(bv >= 40)
+            funcx = unpack("<" + " BH"[nb], data[pos+1:pos+1+nb])[0]
+            func_attrs = func_defs.get(funcx, None)
+            if not func_attrs:
+                print("*** formula/tFunc unknown FuncID:%d" % funcx, file=bk.logfile)
+                spush(unk_opnd)
+            else:
+                func_name, nargs = func_attrs[:2]
+                if verbose:
+                    print("    FuncID=%d name=%s nargs=%d" \
+                          % (funcx, func_name, nargs))
+                assert len(stack) >= nargs
+                argtext = listsep.join([arg.text for arg in stack[-nargs:]])
+                otext = "%s(%s)" % (func_name, argtext)
+                del stack[-nargs:]
+                res = Operand(oUNK, None, FUNC_RANK, otext)
+                spush(res)
+        elif opcode == 0x02: #tFuncVar
+            nb = 1 + int(bv >= 40)
+            nargs, funcx = unpack("<B" + " BH"[nb], data[pos+1:pos+2+nb])
+            prompt, nargs = divmod(nargs, 128)
+            macro, funcx = divmod(funcx, 32768)
+            if verbose:
+                print("   FuncID=%d nargs=%d macro=%d prompt=%d" \
+                      % (funcx, nargs, macro, prompt))
+            #### TODO #### if funcx == 255: # call add-in function
+            if funcx == 255:
+                func_attrs = ("CALL_ADDIN", 1, 30)
+            else:
+                func_attrs = func_defs.get(funcx, None)
+            if not func_attrs:
+                print("*** formula/tFuncVar unknown FuncID:%d" \
+                      % funcx, file=bk.logfile)
+                spush(unk_opnd)
+            else:
+                func_name, minargs, maxargs = func_attrs[:3]
+                if verbose:
+                    print("    name: %r, min~max args: %d~%d" \
+                        % (func_name, minargs, maxargs))
+                assert minargs <= nargs <= maxargs
+                assert len(stack) >= nargs
+                assert len(stack) >= nargs
+                argtext = listsep.join([arg.text for arg in stack[-nargs:]])
+                otext = "%s(%s)" % (func_name, argtext)
+                res = Operand(oUNK, None, FUNC_RANK, otext)
+                del stack[-nargs:]
+                spush(res)
+        elif opcode == 0x03: #tName
+            tgtnamex = unpack("<H", data[pos+1:pos+3])[0] - 1
+            # Only change with BIFF version is number of trailing UNUSED bytes!
+            if verbose: print("   tgtnamex=%d" % tgtnamex, file=bk.logfile)
+            tgtobj = bk.name_obj_list[tgtnamex]
+            if tgtobj.scope == -1:
+                otext = tgtobj.name
+            else:
+                otext = "%s!%s" % (bk._sheet_names[tgtobj.scope], tgtobj.name)
+            if verbose:
+                print("    tName: setting text to", repr(otext), file=bk.logfile)
+            res = Operand(oUNK, None, LEAF_RANK, otext)
+            spush(res)
+        elif opcode == 0x04: # tRef
+            res = get_cell_addr(data, pos+1, bv, reldelta, browx, bcolx)
+            if verbose: print("  ", res, file=bk.logfile)
+            rowx, colx, row_rel, col_rel = res
+            is_rel = row_rel or col_rel
+            if is_rel:
+                okind = oREL
+            else:
+                okind = oREF
+            otext = cellnamerel(rowx, colx, row_rel, col_rel)
+            res = Operand(okind, None, LEAF_RANK, otext)
+            spush(res)
+        elif opcode == 0x05: # tArea
+            res1, res2 = get_cell_range_addr(
+                            data, pos+1, bv, reldelta, browx, bcolx)
+            if verbose: print("  ", res1, res2, file=bk.logfile)
+            rowx1, colx1, row_rel1, col_rel1 = res1
+            rowx2, colx2, row_rel2, col_rel2 = res2
+            coords = (rowx1, rowx2+1, colx1, colx2+1)
+            relflags = (row_rel1, row_rel2, col_rel1, col_rel2)
+            is_rel = 1 if sum(relflags) else 0 # (to_py3)
+            if is_rel:
+                okind = oREL
+            else:
+                okind = oREF
+            if verbose: print("   ", coords, relflags, file=bk.logfile)
+            otext = rangename2drel(coords, relflags)
+            res = Operand(okind, None, LEAF_RANK, otext)
+            spush(res)
+        elif opcode == 0x06: # tMemArea
+            not_in_name_formula(op, oname)
+        elif opcode == 0x09: # tMemFunc
+            nb = unpack("<H", data[pos+1:pos+3])[0]
+            if verbose: print("  %d bytes of cell ref formula" % nb, file=bk.logfile)
+            # no effect on stack
+        elif opcode == 0x0C: #tRefN
+            not_in_name_formula(op, oname)
+            # res = get_cell_addr(data, pos+1, bv, reldelta=1)
+            # # note *ALL* tRefN usage has signed offset for relative addresses
+            # any_rel = 1
+            # if verbose: print >> bk.logfile, "   ", res
+            # spush(res)
+        elif opcode == 0x0D: #tAreaN
+            not_in_name_formula(op, oname)
+            # res = get_cell_range_addr(data, pos+1, bv, reldelta=1)
+            # # note *ALL* tAreaN usage has signed offset for relative addresses
+            # any_rel = 1
+            # if verbose: print >> bk.logfile, "   ", res
+        elif opcode == 0x1A: # tRef3d
+            if bv >= 80:
+                res = get_cell_addr(data, pos+3, bv, reldelta, browx, bcolx)
+                refx = unpack("<H", data[pos+1:pos+3])[0]
+                shx1, shx2 = get_externsheet_local_range(bk, refx, verbose)
+            else:
+                res = get_cell_addr(data, pos+15, bv, reldelta, browx, bcolx)
+                raw_extshtx, raw_shx1, raw_shx2 = \
+                             unpack("<hxxxxxxxxhh", data[pos+1:pos+15])
+                if verbose:
+                    print("tRef3d", raw_extshtx, raw_shx1, raw_shx2, file=bk.logfile)
+                shx1, shx2 = get_externsheet_local_range_b57(
+                                bk, raw_extshtx, raw_shx1, raw_shx2, verbose)
+            rowx, colx, row_rel, col_rel = res
+            is_rel = row_rel or col_rel
+            any_rel = any_rel or is_rel
+            coords = (shx1, shx2+1, rowx, rowx+1, colx, colx+1)
+            any_err |= shx1 < -1
+            if verbose: print("   ", coords, file=bk.logfile)
+            res = Operand(oUNK, None)
+            if is_rel:
+                relflags = (0, 0, row_rel, row_rel, col_rel, col_rel)
+                ref3d = Ref3D(coords + relflags)
+                res.kind = oREL
+                res.text = rangename3drel(bk, ref3d)
+            else:
+                ref3d = Ref3D(coords)
+                res.kind = oREF
+                res.text = rangename3d(bk, ref3d)
+            res.rank = LEAF_RANK
+            res.value = None
+            spush(res)
+        elif opcode == 0x1B: # tArea3d
+            if bv >= 80:
+                res1, res2 = get_cell_range_addr(data, pos+3, bv, reldelta)
+                refx = unpack("<H", data[pos+1:pos+3])[0]
+                shx1, shx2 = get_externsheet_local_range(bk, refx, verbose)
+            else:
+                res1, res2 = get_cell_range_addr(data, pos+15, bv, reldelta)
+                raw_extshtx, raw_shx1, raw_shx2 = \
+                             unpack("<hxxxxxxxxhh", data[pos+1:pos+15])
+                if verbose:
+                    print("tArea3d", raw_extshtx, raw_shx1, raw_shx2, file=bk.logfile)
+                shx1, shx2 = get_externsheet_local_range_b57(
+                                bk, raw_extshtx, raw_shx1, raw_shx2, verbose)
+            any_err |= shx1 < -1
+            rowx1, colx1, row_rel1, col_rel1 = res1
+            rowx2, colx2, row_rel2, col_rel2 = res2
+            is_rel = row_rel1 or col_rel1 or row_rel2 or col_rel2
+            any_rel = any_rel or is_rel
+            coords = (shx1, shx2+1, rowx1, rowx2+1, colx1, colx2+1)
+            if verbose: print("   ", coords, file=bk.logfile)
+            res = Operand(oUNK, None)
+            if is_rel:
+                relflags = (0, 0, row_rel1, row_rel2, col_rel1, col_rel2)
+                ref3d = Ref3D(coords + relflags)
+                res.kind = oREL
+                res.text = rangename3drel(bk, ref3d)
+            else:
+                ref3d = Ref3D(coords)
+                res.kind = oREF
+                res.text = rangename3d(bk, ref3d)
+            res.rank = LEAF_RANK
+            spush(res)
+        elif opcode == 0x19: # tNameX
+            dodgy = 0
+            res = Operand(oUNK, None)
+            if bv >= 80:
+                refx, tgtnamex = unpack("<HH", data[pos+1:pos+5])
+                tgtnamex -= 1
+                origrefx = refx
+            else:
+                refx, tgtnamex = unpack("<hxxxxxxxxH", data[pos+1:pos+13])
+                tgtnamex -= 1
+                origrefx = refx
+                if refx > 0:
+                    refx -= 1
+                elif refx < 0:
+                    refx = -refx - 1
+                else:
+                    dodgy = 1
+            if verbose:
+                print("   origrefx=%d refx=%d tgtnamex=%d dodgy=%d" \
+                    % (origrefx, refx, tgtnamex, dodgy), file=bk.logfile)
+            # if tgtnamex == namex:
+            #     if verbose: print >> bk.logfile, "!!!! Self-referential !!!!"
+            #     dodgy = any_err = 1
+            if not dodgy:
+                if bv >= 80:
+                    shx1, shx2 = get_externsheet_local_range(bk, refx, verbose)
+                elif origrefx > 0:
+                    shx1, shx2 = (-4, -4) # external ref
+                else:
+                    exty = bk._externsheet_type_b57[refx]
+                    if exty == 4: # non-specific sheet in own doc't
+                        shx1, shx2 = (-1, -1) # internal, any sheet
+                    else:
+                        shx1, shx2 = (-666, -666)
+            okind = oUNK
+            ovalue = None
+            if shx1 == -5: # addin func name
+                okind = oSTRG
+                ovalue = bk.addin_func_names[tgtnamex]
+                otext = '"' + ovalue.replace('"', '""') + '"'
+            elif dodgy or shx1 < -1:
+                otext = "<<Name #%d in external(?) file #%d>>" \
+                        % (tgtnamex, origrefx)
+            else:
+                tgtobj = bk.name_obj_list[tgtnamex]
+                if tgtobj.scope == -1:
+                    otext = tgtobj.name
+                else:
+                    otext = "%s!%s" \
+                            % (bk._sheet_names[tgtobj.scope], tgtobj.name)
+                if verbose:
+                    print("    tNameX: setting text to", repr(res.text), file=bk.logfile)
+            res = Operand(okind, ovalue, LEAF_RANK, otext)
+            spush(res)
+        elif opcode in _error_opcodes:
+            any_err = 1
+            spush(error_opnd)
+        else:
+            if verbose:
+                print("FORMULA: /// Not handled yet: t" + oname, file=bk.logfile)
+            any_err = 1
+        if sz <= 0:
+            raise FormulaError("Fatal: token size is not positive")
+        pos += sz
+    any_rel = not not any_rel
+    if verbose:
+        print("End of formula. level=%d any_rel=%d any_err=%d stack=%r" % \
+            (level, not not any_rel, any_err, stack))
+        if len(stack) >= 2:
+            print("*** Stack has unprocessed args")
+        print()
+
+    if len(stack) != 1:
+        result = None
+    else:
+        result = stack[0].text
+    return result
+
+#### under deconstruction ###
+def dump_formula(bk, data, fmlalen, bv, reldelta, verbose=0, isname=0):
+    if verbose:
+        print("dump_formula", fmlalen, bv, len(data))
+        hex_char_dump(data, 0, fmlalen)
+    assert bv >= 80 #### this function needs updating ####
+    sztab = szdict[bv]
+    pos = 0
+    stack = []
+    any_rel = 0
+    any_err = 0
+    spush = stack.append
+    while 0 <= pos < fmlalen:
+        op = data[pos]
+        opcode = op & 0x1f
+        optype = (op & 0x60) >> 5
+        if optype:
+            opx = opcode + 32
+        else:
+            opx = opcode
+        oname = onames[opx] # + [" RVA"][optype]
+
+        sz = sztab[opx]
+        if verbose:
+            print("Pos:%d Op:0x%02x Name:t%s Sz:%d opcode:%02xh optype:%02xh" \
+                % (pos, op, oname, sz, opcode, optype))
+        if not optype:
+            if 0x01 <= opcode <= 0x02: # tExp, tTbl
+                # reference to a shared formula or table record
+                rowx, colx = unpack("<HH", data[pos+1:pos+5])
+                if verbose: print("  ", (rowx, colx), file=bk.logfile)
+            elif opcode == 0x10: # tList
+                if verbose: print("tList pre", stack, file=bk.logfile)
+                assert len(stack) >= 2
+                bop = stack.pop()
+                aop = stack.pop()
+                spush(aop + bop)
+                if verbose: print("tlist post", stack, file=bk.logfile)
+            elif opcode == 0x11: # tRange
+                if verbose: print("tRange pre", stack, file=bk.logfile)
+                assert len(stack) >= 2
+                bop = stack.pop()
+                aop = stack.pop()
+                assert len(aop) == 1
+                assert len(bop) == 1
+                result = do_box_funcs(tRangeFuncs, aop[0], bop[0])
+                spush(result)
+                if verbose: print("tRange post", stack, file=bk.logfile)
+            elif opcode == 0x0F: # tIsect
+                if verbose: print("tIsect pre", stack, file=bk.logfile)
+                assert len(stack) >= 2
+                bop = stack.pop()
+                aop = stack.pop()
+                assert len(aop) == 1
+                assert len(bop) == 1
+                result = do_box_funcs(tIsectFuncs, aop[0], bop[0])
+                spush(result)
+                if verbose: print("tIsect post", stack, file=bk.logfile)
+            elif opcode == 0x19: # tAttr
+                subop, nc = unpack("<BH", data[pos+1:pos+4])
+                subname = tAttrNames.get(subop, "??Unknown??")
+                if subop == 0x04: # Choose
+                    sz = nc * 2 + 6
+                else:
+                    sz = 4
+                if verbose: print("   subop=%02xh subname=t%s sz=%d nc=%02xh" % (subop, subname, sz, nc), file=bk.logfile)
+            elif opcode == 0x17: # tStr
+                if bv <= 70:
+                    nc = data[pos+1]
+                    strg = data[pos+2:pos+2+nc] # left in 8-bit encoding
+                    sz = nc + 2
+                else:
+                    strg, newpos = unpack_unicode_update_pos(data, pos+1, lenlen=1)
+                    sz = newpos - pos
+                if verbose: print("   sz=%d strg=%r" % (sz, strg), file=bk.logfile)
+            else:
+                if sz <= 0:
+                    print("**** Dud size; exiting ****")
+                    return
+            pos += sz
+            continue
+        if opcode == 0x00: # tArray
+            pass
+        elif opcode == 0x01: # tFunc
+            nb = 1 + int(bv >= 40)
+            funcx = unpack("<" + " BH"[nb], data[pos+1:pos+1+nb])
+            if verbose: print("   FuncID=%d" % funcx, file=bk.logfile)
+        elif opcode == 0x02: #tFuncVar
+            nb = 1 + int(bv >= 40)
+            nargs, funcx = unpack("<B" + " BH"[nb], data[pos+1:pos+2+nb])
+            prompt, nargs = divmod(nargs, 128)
+            macro, funcx = divmod(funcx, 32768)
+            if verbose: print("   FuncID=%d nargs=%d macro=%d prompt=%d" % (funcx, nargs, macro, prompt), file=bk.logfile)
+        elif opcode == 0x03: #tName
+            namex = unpack("<H", data[pos+1:pos+3])
+            # Only change with BIFF version is the number of trailing UNUSED bytes!!!
+            if verbose: print("   namex=%d" % namex, file=bk.logfile)
+        elif opcode == 0x04: # tRef
+            res = get_cell_addr(data, pos+1, bv, reldelta)
+            if verbose: print("  ", res, file=bk.logfile)
+        elif opcode == 0x05: # tArea
+            res = get_cell_range_addr(data, pos+1, bv, reldelta)
+            if verbose: print("  ", res, file=bk.logfile)
+        elif opcode == 0x09: # tMemFunc
+            nb = unpack("<H", data[pos+1:pos+3])[0]
+            if verbose: print("  %d bytes of cell ref formula" % nb, file=bk.logfile)
+        elif opcode == 0x0C: #tRefN
+            res = get_cell_addr(data, pos+1, bv, reldelta=1)
+            # note *ALL* tRefN usage has signed offset for relative addresses
+            any_rel = 1
+            if verbose: print("   ", res, file=bk.logfile)
+        elif opcode == 0x0D: #tAreaN
+            res = get_cell_range_addr(data, pos+1, bv, reldelta=1)
+            # note *ALL* tAreaN usage has signed offset for relative addresses
+            any_rel = 1
+            if verbose: print("   ", res, file=bk.logfile)
+        elif opcode == 0x1A: # tRef3d
+            refx = unpack("<H", data[pos+1:pos+3])[0]
+            res = get_cell_addr(data, pos+3, bv, reldelta)
+            if verbose: print("  ", refx, res, file=bk.logfile)
+            rowx, colx, row_rel, col_rel = res
+            any_rel = any_rel or row_rel or col_rel
+            shx1, shx2 = get_externsheet_local_range(bk, refx, verbose)
+            any_err |= shx1 < -1
+            coords = (shx1, shx2+1, rowx, rowx+1, colx, colx+1)
+            if verbose: print("   ", coords, file=bk.logfile)
+            if optype == 1: spush([coords])
+        elif opcode == 0x1B: # tArea3d
+            refx = unpack("<H", data[pos+1:pos+3])[0]
+            res1, res2 = get_cell_range_addr(data, pos+3, bv, reldelta)
+            if verbose: print("  ", refx, res1, res2, file=bk.logfile)
+            rowx1, colx1, row_rel1, col_rel1 = res1
+            rowx2, colx2, row_rel2, col_rel2 = res2
+            any_rel = any_rel or row_rel1 or col_rel1 or row_rel2 or col_rel2
+            shx1, shx2 = get_externsheet_local_range(bk, refx, verbose)
+            any_err |= shx1 < -1
+            coords = (shx1, shx2+1, rowx1, rowx2+1, colx1, colx2+1)
+            if verbose: print("   ", coords, file=bk.logfile)
+            if optype == 1: spush([coords])
+        elif opcode == 0x19: # tNameX
+            refx, namex = unpack("<HH", data[pos+1:pos+5])
+            if verbose: print("   refx=%d namex=%d" % (refx, namex), file=bk.logfile)
+        elif opcode in _error_opcodes:
+            any_err = 1
+        else:
+            if verbose: print("FORMULA: /// Not handled yet: t" + oname, file=bk.logfile)
+            any_err = 1
+        if sz <= 0:
+            print("**** Dud size; exiting ****")
+            return
+        pos += sz
+    if verbose:
+        print("End of formula. any_rel=%d any_err=%d stack=%r" % \
+            (not not any_rel, any_err, stack), file=bk.logfile)
+        if len(stack) >= 2:
+            print("*** Stack has unprocessed args", file=bk.logfile)
+
+# === Some helper functions for displaying cell references ===
+
+# Note that a "non-standard" syntax is used in row and column
+# components in relative references.
+# For example, consider a relative reference: up two rows, right 3 columns.
+# On screen, with cursor in cell D10, this would appear as G8.
+# On screen, with cursor in cell Z100, this would appear as AC98.
+# On screen, with cursor in cell A1, this would appear as D65535.
+# These functions will display such a reference as [@+3,#-2].
+# "@" refers to the unknown base column.
+# "#" refers to the unknown base row.
+#
+# I'm aware of only one possibility of a sheet-relative component in
+# a reference: a 2D reference located in the "current sheet".
+# xlrd stores this internally with bounds of (0, 1, ...) and
+# relative flags of (1, 1, ...). These functions display the
+# sheet component as empty, just like Excel etc.
+
+def rownamerel(rowx, rowxrel):
+    if not rowxrel:
+        return "$%d" % rowx
+    if rowx > 0:
+        return "#+%d" % rowx
+    if rowx < 0:
+        return "#-%d" % (-rowx)
+    return "#"
+
+def colnamerel(colx, colxrel):
+    if not colxrel:
+        return "$" + colname(colx)
+    if colx > 0:
+        return "@+%d" % colx
+    if colx < 0:
+        return "@-%d" % (-colx)
+    return "@"
+##
+# Utility function: (5, 7) => 'H6'
+def cellname(rowx, colx):
+    """ (5, 7) => 'H6' """
+    return "%s%d" % (colname(colx), rowx+1)
+
+##
+# Utility function: (5, 7) => '$H$6'
+def cellnameabs(rowx, colx):
+    """ (5, 7) => '$H$6' """
+    return "$%s$%d" % (colname(colx), rowx+1)
+
+def cellnamerel(rowx, colx, rowxrel, colxrel):
+    if not rowxrel and not colxrel:
+        return cellnameabs(rowx, colx)
+    return "[%s,%s]" % (
+        colnamerel(colx, colxrel),
+        rownamerel(rowx, rowxrel))
+##
+# Utility function: 7 => 'H', 27 => 'AB'
+def colname(colx):
+    """ 7 => 'H', 27 => 'AB' """
+    alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+    if colx <= 25:
+        return alphabet[colx]
+    else:
+        xdiv26, xmod26 = divmod(colx, 26)
+        return alphabet[xdiv26 - 1] + alphabet[xmod26]
+
+def rangename2d(rlo, rhi, clo, chi):
+    """ (5, 20, 7, 10) => '$H$6:$J$20' """
+    if rhi == rlo+1 and chi == clo+1:
+        return cellnameabs(rlo, clo)
+    return "%s:%s" % (cellnameabs(rlo, clo), cellnameabs(rhi-1, chi-1))
+
+def rangename2drel(xxx_todo_changeme, xxx_todo_changeme1):
+    (rlo, rhi, clo, chi) = xxx_todo_changeme
+    (rlorel, rhirel, clorel, chirel) = xxx_todo_changeme1
+    return "%s:%s" % (
+        cellnamerel(rlo, clo, rlorel, clorel),
+        cellnamerel(rhi-1, chi-1, rhirel, chirel)
+        )
+##
+# Utility function:
+# <br /> Ref3D((1, 4, 5, 20, 7, 10)) => 'Sheet2:Sheet3!$H$6:$J$20'
+def rangename3d(book, ref3d):
+    """ Ref3D(1, 4, 5, 20, 7, 10) => 'Sheet2:Sheet3!$H$6:$J$20'
+        (assuming Excel's default sheetnames) """
+    coords = ref3d.coords
+    return "%s!%s" % (
+        sheetrange(book, *coords[:2]),
+        rangename2d(*coords[2:6]))
+
+##
+# Utility function:
+# <br /> Ref3D(coords=(0, 1, -32, -22, -13, 13), relflags=(0, 0, 1, 1, 1, 1))
+# => 'Sheet1![@-13,#-32]:[@+12,#-23]'
+# where '@' refers to the current or base column and '#'
+# refers to the current or base row.
+def rangename3drel(book, ref3d):
+    coords = ref3d.coords
+    relflags = ref3d.relflags
+    shdesc = sheetrangerel(book, coords[:2], relflags[:2])
+    rngdesc = rangename2drel(coords[2:6], relflags[2:6])
+    if not shdesc:
+        return rngdesc
+    return "%s!%s" % (shdesc, rngdesc)
+
+def quotedsheetname(shnames, shx):
+    if shx >= 0:
+        shname = shnames[shx]
+    else:
+        shname = {
+            -1: "?internal; any sheet?",
+            -2: "internal; deleted sheet",
+            -3: "internal; macro sheet",
+            -4: "<<external>>",
+            }.get(shx, "?error %d?" % shx)
+    if "'" in shname:
+        return "'" + shname.replace("'", "''") + "'"
+    if " " in shname:
+        return "'" + shname + "'"
+    return shname
+
+def sheetrange(book, slo, shi):
+    shnames = book.sheet_names()
+    shdesc = quotedsheetname(shnames, slo)
+    if slo != shi-1:
+        shdesc += ":" + quotedsheetname(shnames, shi-1)
+    return shdesc
+
+def sheetrangerel(book, xxx_todo_changeme2, xxx_todo_changeme3):
+    (slo, shi) = xxx_todo_changeme2
+    (slorel, shirel) = xxx_todo_changeme3
+    if not slorel and not shirel:
+        return sheetrange(book, slo, shi)
+    assert (slo == 0 == shi-1) and slorel and shirel
+    return ""
+
+# ==============================================================
diff --git a/tablib/packages/xlrd3/sheet.py b/tablib/packages/xlrd3/sheet.py
new file mode 100644
index 0000000..5911fb0
--- /dev/null
+++ b/tablib/packages/xlrd3/sheet.py
@@ -0,0 +1,1611 @@
+# Portions copyright © 2005-2009 Stephen John Machin, Lingfo Pty Ltd
+# This module is part of the xlrd3 package, which is released under a
+# BSD-style licence.
+
+# 2009-05-31 SJM Fixed problem with no CODEPAGE record on extremely minimal BIFF2.x 3rd-party file
+# 2009-04-27 SJM Integrated on_demand patch by Armando Serrano Lombillo
+# 2008-02-09 SJM Excel 2.0: build XFs on the fly from cell attributes
+# 2007-12-04 SJM Added support for Excel 2.x (BIFF2) files.
+# 2007-10-11 SJM Added missing entry for blank cell type to ctype_text
+# 2007-07-11 SJM Allow for BIFF2/3-style FORMAT record in BIFF4/8 file
+# 2007-04-22 SJM Remove experimental "trimming" facility.
+
+#for debugging only
+from math import isnan
+
+import time
+from struct import unpack
+from array import array
+
+from .biffh import *
+from .formula import dump_formula, decompile_formula, rangename2d
+from .formatting import nearest_colour_index, Format
+from .xfcell import XFCell
+
+DEBUG = 0
+OBJ_MSO_DEBUG = 0
+
+_WINDOW2_options = (
+    # Attribute names and initial values to use in case
+    # a WINDOW2 record is not written.
+    ("show_formulas", 0),
+    ("show_grid_lines", 1),
+    ("show_sheet_headers", 1),
+    ("panes_are_frozen", 0),
+    ("show_zero_values", 1),
+    ("automatic_grid_line_colour", 1),
+    ("columns_from_right_to_left", 0),
+    ("show_outline_symbols", 1),
+    ("remove_splits_if_pane_freeze_is_removed", 0),
+    ("sheet_selected", 0),
+    # "sheet_visible" appears to be merely a clone of "sheet_selected".
+    # The real thing is the visibility attribute from the BOUNDSHEET record.
+    ("sheet_visible", 0),
+    ("show_in_page_break_preview", 0),
+    )
+
+def int_floor_div(x, y):
+    return divmod(x, y)[0]
+
+class Sheet(BaseObject):
+    """Contains the data for one worksheet.
+
+    In the cell access functions, "rowx" is a row index, counting from zero,
+    and "colx" is a column index, counting from zero.
+    Negative values for row/column indexes and slice positions are supported in
+    the expected fashion.
+
+    For information about cell types and cell values, refer to the documentation
+    of the Cell class.
+
+    WARNING: You don't call this class yourself. You access Sheet objects via
+    the Book object that was returned when you called xlrd.open_workbook("myfile.xls").
+    """
+
+    # Name of sheet.
+    name = ''
+
+    # Number of rows in sheet. A row index is in range(thesheet.nrows).
+    nrows = 0
+
+    # Number of columns in sheet. A column index is in range(thesheet.ncols).
+    ncols = 0
+
+    # The map from a column index to a Colinfo object. Often there is an entry
+    # in COLINFO records for all column indexes in range(257).
+    # Note that xlrd ignores the entry for the non-existent
+    # 257th column. On the other hand, there may be no entry for unused columns.
+    # - New in version 0.6.1
+    colinfo_map = {}
+
+    # The map from a row index to a Rowinfo object. Note that it is possible
+    # to have missing entries -- at least one source of XLS files doesn't
+    # bother writing ROW records.
+    # - New in version 0.6.1
+    rowinfo_map = {}
+
+    # List of address ranges of cells containing column labels.
+    # These are set up in Excel by Insert > Name > Labels > Columns.
+    # - New in version 0.6.0
+    # How to deconstruct the list::
+    #
+    # for crange in thesheet.col_label_ranges:
+    #     rlo, rhi, clo, chi = crange
+    #     for rx in xrange(rlo, rhi):
+    #         for cx in xrange(clo, chi):
+    #             print "Column label at (rowx=%d, colx=%d) is %r" \
+    #                 (rx, cx, thesheet.cell_value(rx, cx))
+    #
+    col_label_ranges = []
+
+    # List of address ranges of cells containing row labels.
+    # For more details, see <i>col_label_ranges</i> above.
+    # - New in version 0.6.0
+    row_label_ranges = []
+
+    # List of address ranges of cells which have been merged.
+    # These are set up in Excel by Format > Cells > Alignment, then ticking
+    # the "Merge cells" box.
+    # - New in version 0.6.1. Extracted only if open_workbook(..., formatting_info=True)
+    # How to deconstruct the list::
+    #
+    # for crange in thesheet.merged_cells:
+    #     rlo, rhi, clo, chi = crange
+    #     for rowx in xrange(rlo, rhi):
+    #         for colx in xrange(clo, chi):
+    #             # cell (rlo, clo) (the top left one) will carry the data
+    #             # and formatting info; the remainder will be recorded as
+    #             # blank cells, but a renderer will apply the formatting info
+    #             # for the top left cell (e.g. border, pattern) to all cells in
+    #             # the range.
+    #
+    merged_cells = []
+
+    # Default column width from DEFCOLWIDTH record, else None.
+    # From the OOo docs:
+    # """Column width in characters, using the width of the zero character
+    # from default font (first FONT record in the file). Excel adds some
+    # extra space to the default width, depending on the default font and
+    # default font size. The algorithm how to exactly calculate the resulting
+    # column width is not known.
+    # Example: The default width of 8 set in this record results in a column
+    # width of 8.43 using Arial font with a size of 10 points."""
+    # For the default hierarchy, refer to the Colinfo class above.
+    # - New in version 0.6.1
+    defcolwidth = None
+
+    # Default column width from STANDARDWIDTH record, else None.
+    # From the OOo docs:
+    # """Default width of the columns in 1/256 of the width of the zero
+    # character, using default font (first FONT record in the file)."""
+    # For the default hierarchy, refer to the Colinfo class above.
+    # - New in version 0.6.1
+    standardwidth = None
+
+    # Default value to be used for a row if there is
+    # no ROW record for that row.
+    # From the <i>optional</i> DEFAULTROWHEIGHT record.
+    default_row_height = None
+
+    # Default value to be used for a row if there is
+    # no ROW record for that row.
+    # From the ´optional´ DEFAULTROWHEIGHT record.
+    default_row_height_mismatch = None
+
+    # Default value to be used for a row if there is
+    # no ROW record for that row.
+    # From the ´optional´ DEFAULTROWHEIGHT record.
+    default_row_hidden = None
+
+    # Default value to be used for a row if there is
+    # no ROW record for that row.
+    # From the <i>optional</i> DEFAULTROWHEIGHT record.
+    default_additional_space_above = None
+
+    # Default value to be used for a row if there is
+    # no ROW record for that row.
+    # From the <i>optional</i> DEFAULTROWHEIGHT record.
+    default_additional_space_below = None
+
+    # Visibility of the sheet. 0 = visible, 1 = hidden (can be unhidden
+    # by user -- Format/Sheet/Unhide), 2 = "very hidden" (can be unhidden
+    # only by VBA macro).
+    visibility = 0
+
+    # A 256-element tuple corresponding to the contents of the GCW record for this sheet.
+    # If no such record, treat as all bits zero.
+    # Applies to BIFF4-7 only. See docs of Colinfo class for discussion.
+    gcw = (0, ) * 256
+
+    def __init__(self, book, position, name, number):
+        self.book = book
+        self.biff_version = book.biff_version
+        self._position = position
+        self.logfile = book.logfile
+        self.pickleable = book.pickleable
+        # (to_py3) self.dont_use_array = not(array_array and (CAN_PICKLE_ARRAY or not book.pickleable))
+        self.name = name
+        self.number = number
+        self.verbosity = book.verbosity
+        self.formatting_info = book.formatting_info
+        self._xf_index_to_xl_type_map = book._xf_index_to_xl_type_map
+        self.nrows = 0 # actual, including possibly empty cells
+        self.ncols = 0
+        self._maxdatarowx = -1 # highest rowx containing a non-empty cell
+        self._maxdatacolx = -1 # highest colx containing a non-empty cell
+        self._dimnrows = 0 # as per DIMENSIONS record
+        self._dimncols = 0
+        self._cell_values = []
+        self._cell_types = []
+        self._cell_xf_indexes = []
+        self._need_fix_ragged_rows = 0
+        self.defcolwidth = None
+        self.standardwidth = None
+        self.default_row_height = None
+        self.default_row_height_mismatch = 0
+        self.default_row_hidden = 0
+        self.default_additional_space_above = 0
+        self.default_additional_space_below = 0
+        self.colinfo_map = {}
+        self.rowinfo_map = {}
+        self.col_label_ranges = []
+        self.row_label_ranges = []
+        self.merged_cells = []
+        self._xf_index_stats = [0, 0, 0, 0]
+        self.visibility = book._sheet_visibility[number] # from BOUNDSHEET record
+        for attr, defval in _WINDOW2_options:
+            setattr(self, attr, defval)
+        self.first_visible_rowx = 0
+        self.first_visible_colx = 0
+        self.gridline_colour_index = 0x40
+        self.gridline_colour_rgb = None # pre-BIFF8
+        self.cached_page_break_preview_mag_factor = 0
+        self.cached_normal_view_mag_factor = 0
+        self._ixfe = None # BIFF2 only
+        self._cell_attr_to_xfx = {} # BIFF2.0 only
+
+        #### Don't initialise this here, use class attribute initialisation.
+        #### self.gcw = (0, ) * 256 ####
+
+        if self.biff_version >= 80:
+            self.utter_max_rows = 65536
+        else:
+            self.utter_max_rows = 16384
+        self.utter_max_cols = 256
+
+    def cell(self, rowx, colx):
+        """ Get the XFCell() object in the given row and column. """
+        if self.formatting_info:
+            xf_index = self.cell_xf_index(rowx, colx)
+        else:
+            xf_index = None
+        ctype = self.cell_type(rowx, colx)
+        value = self.cell_value(rowx, colx)
+        return Cell(ctype, value, xf_index, self)
+
+    def cell_value(self, rowx, colx):
+        """ Value of the cell in the given row and column. """
+        return self._cell_values[rowx][colx]
+
+    def cell_type(self, rowx, colx):
+        """ Type of the cell in the given row and column.
+        Refer to the documentation of the Cell class.
+        """
+        return self._cell_types[rowx][colx]
+
+    # New in version 0.6.1
+    def cell_xf_index(self, rowx, colx):
+        """ XF index of the cell in the given row and column.
+        This is an index into Book.xf_list.
+        """
+        self.req_fmt_info()
+        xfx = self._cell_xf_indexes[rowx][colx]
+        if xfx > -1:
+            self._xf_index_stats[0] += 1
+            return xfx
+        # Check for a row xf_index
+        try:
+            xfx = self.rowinfo_map[rowx].xf_index
+            if xfx > -1:
+                self._xf_index_stats[1] += 1
+                return xfx
+        except KeyError:
+            pass
+        # Check for a column xf_index
+        try:
+            xfx = self.colinfo_map[colx].xf_index
+            assert xfx > -1
+            self._xf_index_stats[2] += 1
+            return xfx
+        except KeyError:
+            # If all else fails, 15 is used as hardwired global default xf_index.
+            self._xf_index_stats[3] += 1
+            return 15
+
+
+    def row(self, rowx):
+        """ Returns a sequence of the Cell objects in the given row. """
+        return [self.cell(rowx, colx) for colx in range(self.ncols)]
+
+    def row_types(self, rowx, start_colx=0, end_colx=None):
+        """ Returns a slice of the types of the cells in the given row. """
+        if end_colx is None:
+            return self._cell_types[rowx][start_colx:]
+        return self._cell_types[rowx][start_colx:end_colx]
+
+    def row_values(self, rowx, start_colx=0, end_colx=None):
+        """ Returns a slice of the values of the cells in the given row. """
+        if end_colx is None:
+            return self._cell_values[rowx][start_colx:]
+        return self._cell_values[rowx][start_colx:end_colx]
+
+    def row_slice(self, rowx, start_colx=0, end_colx=None):
+        """ Returns a slice of the Cell objects in the given row. """
+        nc = self.ncols
+        if start_colx < 0:
+            start_colx += nc
+            if start_colx < 0:
+                start_colx = 0
+        if end_colx is None or end_colx > nc:
+            end_colx = nc
+        elif end_colx < 0:
+            end_colx += nc
+        return [self.cell(rowx, colx) for colx in range(start_colx, end_colx)]
+
+    def col_slice(self, colx, start_rowx=0, end_rowx=None):
+        """ Returns a slice of the Cell objects in the given column. """
+        nr = self.nrows
+        if start_rowx < 0:
+            start_rowx += nr
+            if start_rowx < 0:
+                start_rowx = 0
+        if end_rowx is None or end_rowx > nr:
+            end_rowx = nr
+        elif end_rowx < 0:
+            end_rowx += nr
+        return [self.cell(rowx, colx) for rowx in range(start_rowx, end_rowx)]
+
+    col = col_slice
+    """ Returns a sequence of the Cell objects in the given column. """
+
+    def col_values(self, colx, start_rowx=0, end_rowx=None):
+        """ Returns a slice of the values of the cells in the given column. """
+        nr = self.nrows
+        if start_rowx < 0:
+            start_rowx += nr
+            if start_rowx < 0:
+                start_rowx = 0
+        if end_rowx is None or end_rowx > nr:
+            end_rowx = nr
+        elif end_rowx < 0:
+            end_rowx += nr
+        return [self._cell_values[rowx][colx] for rowx in range(start_rowx, end_rowx)]
+
+    def col_types(self, colx, start_rowx=0, end_rowx=None):
+        """ Returns a slice of the types of the cells in the given column. """
+        nr = self.nrows
+        if start_rowx < 0:
+            start_rowx += nr
+            if start_rowx < 0:
+                start_rowx = 0
+        if end_rowx is None or end_rowx > nr:
+            end_rowx = nr
+        elif end_rowx < 0:
+            end_rowx += nr
+        return [self._cell_types[rowx][colx] for rowx in range(start_rowx, end_rowx)]
+
+    # Following methods are used in building the worksheet.
+    # They are not part of the API.
+
+    def extend_cells(self, nr, nc):
+        assert 1 <= nc <= self.utter_max_cols
+        assert 1 <= nr <= self.utter_max_rows
+        if nr <= self.nrows:
+            # New cell is in an existing row, so extend that row (if necessary).
+            # Note that nr < self.nrows means that the cell data
+            # is not in ascending row order!!
+            self._need_fix_ragged_rows = 1
+            nrx = nr - 1
+            trow = self._cell_types[nrx]
+            tlen = len(trow)
+            nextra = max(nc, self.ncols) - tlen
+            if nextra > 0:
+                xce = XL_CELL_EMPTY
+                #(to_py3) if self.dont_use_array: ... removed
+                trow.extend(array('B', [xce]) * nextra)
+                if self.formatting_info:
+                    self._cell_xf_indexes[nrx].extend(array('h', [-1]) * nextra)
+                self._cell_values[nrx].extend([''] * nextra)
+        if nc > self.ncols:
+            self.ncols = nc
+            self._need_fix_ragged_rows = 1
+        if nr > self.nrows:
+            scta = self._cell_types.append
+            scva = self._cell_values.append
+            scxa = self._cell_xf_indexes.append
+            fmt_info = self.formatting_info
+            xce = XL_CELL_EMPTY
+            nc = self.ncols
+
+            #(to_py3) if self.dont_use_array: ... removed
+            for _unused in range(self.nrows, nr):
+                scta(array('B', [xce]) * nc)
+                scva([''] * nc)
+                if fmt_info:
+                    scxa(array('h', [-1]) * nc)
+            self.nrows = nr
+
+    def fix_ragged_rows(self):
+        t0 = time.time()
+        ncols = self.ncols
+        xce = XL_CELL_EMPTY
+        s_cell_types = self._cell_types
+        s_cell_values = self._cell_values
+        s_cell_xf_indexes = self._cell_xf_indexes
+        s_fmt_info = self.formatting_info
+        totrowlen = 0
+        for rowx in range(self.nrows):
+            trow = s_cell_types[rowx]
+            rlen = len(trow)
+            totrowlen += rlen
+            nextra = ncols - rlen
+            if nextra > 0:
+                s_cell_values[rowx][rlen:] = [''] * nextra
+                trow.extend(array('B', [xce]) * nextra)
+                if s_fmt_info:
+                    s_cell_xf_indexes[rowx][rlen:] = array('h', [-1]) * nextra
+        self._fix_ragged_rows_time = time.time() - t0
+
+    def tidy_dimensions(self):
+        if self.verbosity >= 3:
+            fprintf(self.logfile,
+                "tidy_dimensions: nrows=%d ncols=%d _need_fix_ragged_rows=%d\n",
+                self.nrows, self.ncols, self._need_fix_ragged_rows)
+        if self.merged_cells:
+            nr = nc = 0
+            umaxrows = self.utter_max_rows
+            umaxcols = self.utter_max_cols
+            for crange in self.merged_cells:
+                rlo, rhi, clo, chi = crange
+                if not (0 <= rlo < rhi <= umaxrows) \
+                or not (0 <= clo < chi <= umaxcols):
+                    fprintf(self.logfile,
+                        "*** WARNING: sheet #%d (%r), MERGEDCELLS bad range %r\n",
+                        self.number, self.name, crange)
+                if rhi > nr: nr = rhi
+                if chi > nc: nc = chi
+            self.extend_cells(nr, nc)
+        if self.verbosity >= 1 and \
+           (self.nrows != self._dimnrows or self.ncols != self._dimncols):
+            fprintf(self.logfile,
+                "NOTE *** sheet %d (%r): DIMENSIONS R,C = %d,%d should be %d,%d\n",
+                self.number,
+                self.name,
+                self._dimnrows,
+                self._dimncols,
+                self.nrows,
+                self.ncols,
+                )
+        if self._need_fix_ragged_rows:
+            self.fix_ragged_rows()
+
+    def put_cell(self, rowx, colx, ctype, value, xf_index):
+        try:
+            self._cell_types[rowx][colx] = ctype
+            self._cell_values[rowx][colx] = value
+            if self.formatting_info:
+                self._cell_xf_indexes[rowx][colx] = xf_index
+        except IndexError:
+            self.extend_cells(rowx+1, colx+1)
+            try:
+                self._cell_types[rowx][colx] = ctype
+                self._cell_values[rowx][colx] = value
+                if self.formatting_info:
+                    self._cell_xf_indexes[rowx][colx] = xf_index
+            except:
+                print("put_cell", rowx, colx, file=self.logfile)
+                raise
+        except:
+            print("put_cell", rowx, colx, file=self.logfile)
+            raise
+
+    def put_blank_cell(self, rowx, colx, xf_index):
+        # This is used for cells from BLANK and MULBLANK records
+        ctype = XL_CELL_BLANK
+        value = ''
+        try:
+            self._cell_types[rowx][colx] = ctype
+            self._cell_values[rowx][colx] = value
+            self._cell_xf_indexes[rowx][colx] = xf_index
+        except IndexError:
+            self.extend_cells(rowx+1, colx+1)
+            try:
+                self._cell_types[rowx][colx] = ctype
+                self._cell_values[rowx][colx] = value
+                self._cell_xf_indexes[rowx][colx] = xf_index
+            except:
+                print("put_cell", rowx, colx, file=self.logfile)
+                raise
+        except:
+            print("put_cell", rowx, colx, file=self.logfile)
+            raise
+
+    def put_number_cell(self, rowx, colx, value, xf_index):
+        # for debugging
+        if type(value) == float and isnan(value):
+            pass
+        ctype = self._xf_index_to_xl_type_map[xf_index]
+        try:
+            self._cell_types[rowx][colx] = ctype
+            self._cell_values[rowx][colx] = value
+            if self.formatting_info:
+                self._cell_xf_indexes[rowx][colx] = xf_index
+        except IndexError:
+            self.extend_cells(rowx+1, colx+1)
+            try:
+                self._cell_types[rowx][colx] = ctype
+                self._cell_values[rowx][colx] = value
+                if self.formatting_info:
+                    self._cell_xf_indexes[rowx][colx] = xf_index
+            except:
+                print("put_number_cell", rowx, colx, file=self.logfile)
+                raise
+        except:
+            print("put_number_cell", rowx, colx, file=self.logfile)
+            raise
+
+    # === Methods after this line neither know nor care about how cells are stored.
+
+    def read(self, bk):
+        global rc_stats
+        DEBUG = 0
+        verbose = DEBUG or self.verbosity >= 2
+        verbose_rows = DEBUG or self.verbosity >= 4
+        verbose_formulas = 1 and verbose
+        oldpos = bk._position
+        bk._position = self._position
+        XL_SHRFMLA_ETC_ETC = (
+            XL_SHRFMLA, XL_ARRAY, XL_TABLEOP, XL_TABLEOP2,
+            XL_ARRAY2, XL_TABLEOP_B2,
+            )
+        self_put_number_cell = self.put_number_cell
+        self_put_cell = self.put_cell
+        self_put_blank_cell = self.put_blank_cell
+        local_unpack = unpack
+        bk_get_record_parts = bk.get_record_parts
+        bv = self.biff_version
+        fmt_info = self.formatting_info
+        eof_found = 0
+        while 1:
+            rc, data_len, data = bk_get_record_parts()
+            if rc == XL_NUMBER:
+                rowx, colx, xf_index, d = local_unpack('<HHHd', data)
+                self_put_number_cell(rowx, colx, d, xf_index)
+            elif rc == XL_LABELSST:
+                rowx, colx, xf_index, sstindex = local_unpack('<HHHi', data)
+                self_put_cell(rowx, colx, XL_CELL_TEXT, bk._sharedstrings[sstindex], xf_index)
+            elif rc == XL_LABEL or rc == XL_RSTRING:
+                rowx, colx, xf_index = local_unpack('<HHH', data[0:6])
+                if bv < BIFF_FIRST_UNICODE:
+                    strg = unpack_string(data, 6, bk.encoding or bk.derive_encoding, lenlen=2)
+                else:
+                    strg = unpack_unicode(data, 6, lenlen=2)
+                self_put_cell(rowx, colx, XL_CELL_TEXT, strg, xf_index)
+            elif rc == XL_RK:
+                rowx, colx, xf_index = local_unpack('<HHH', data[:6])
+                d = unpack_RK(data[6:10])
+                self_put_number_cell(rowx, colx, d, xf_index)
+            elif rc == XL_MULRK:
+                mulrk_row, mulrk_first = local_unpack('<HH', data[0:4])
+                mulrk_last, = local_unpack('<H', data[-2:])
+                pos = 4
+                for colx in range(mulrk_first, mulrk_last+1):
+                    xf_index, = local_unpack('<H', data[pos:pos+2])
+                    d = unpack_RK(data[pos+2:pos+6])
+                    pos += 6
+                    self_put_number_cell(mulrk_row, colx, d, xf_index)
+            elif rc == XL_ROW:
+                # Version 0.6.0a3: ROW records are just not worth using (for memory allocation).
+                # Version 0.6.1: now used for formatting info.
+                if not fmt_info: continue
+                rowx, bits1, bits2 = local_unpack('<H4xH4xi', data[0:16])
+                if not(0 <= rowx < self.utter_max_rows):
+                    print("*** NOTE: ROW record has row index %d; " \
+                        "should have 0 <= rowx < %d -- record ignored!" \
+                        % (rowx, self.utter_max_rows), file=self.logfile)
+                    continue
+                r = Rowinfo()
+                # Using upkbits() is far too slow on a file
+                # with 30 sheets each with 10K rows :-(
+                #    upkbits(r, bits1, (
+                #        ( 0, 0x7FFF, 'height'),
+                #        (15, 0x8000, 'has_default_height'),
+                #        ))
+                #    upkbits(r, bits2, (
+                #        ( 0, 0x00000007, 'outline_level'),
+                #        ( 4, 0x00000010, 'outline_group_starts_ends'),
+                #        ( 5, 0x00000020, 'hidden'),
+                #        ( 6, 0x00000040, 'height_mismatch'),
+                #        ( 7, 0x00000080, 'has_default_xf_index'),
+                #        (16, 0x0FFF0000, 'xf_index'),
+                #        (28, 0x10000000, 'additional_space_above'),
+                #        (29, 0x20000000, 'additional_space_below'),
+                #        ))
+                # So:
+                r.height = bits1 & 0x7fff
+                r.has_default_height = (bits1 >> 15) & 1
+                r.outline_level = bits2 & 7
+                r.outline_group_starts_ends = (bits2 >> 4) & 1
+                r.hidden = (bits2 >> 5) & 1
+                r.height_mismatch = (bits2 >> 6) & 1
+                r.has_default_xf_index = (bits2 >> 7) & 1
+                r.xf_index = (bits2 >> 16) & 0xfff
+                r.additional_space_above = (bits2 >> 28) & 1
+                r.additional_space_below = (bits2 >> 29) & 1
+                if not r.has_default_xf_index:
+                    r.xf_index = -1
+                self.rowinfo_map[rowx] = r
+                if 0 and r.xf_index > -1:
+                    fprintf(self.logfile,
+                        "**ROW %d %d %d\n",
+                        self.number, rowx, r.xf_index)
+                if verbose_rows:
+                    print('ROW', rowx, bits1, bits2, file=self.logfile)
+                    r.dump(self.logfile,
+                        header="--- sh #%d, rowx=%d ---" % (self.number, rowx))
+            elif rc in XL_FORMULA_OPCODES: # 06, 0206, 0406
+                if bv >= 50:
+                    # IMPORTANT result_str is bytes
+                    rowx, colx, xf_index, result_str, flags = local_unpack('<HHH8sH', data[0:16])
+                    lenlen = 2
+                    tkarr_offset = 20
+                elif bv >= 30:
+                    rowx, colx, xf_index, result_str, flags = local_unpack('<HHH8sH', data[0:16])
+                    lenlen = 2
+                    tkarr_offset = 16
+                else: # BIFF2
+                    rowx, colx, cell_attr,  result_str, flags = local_unpack('<HH3s8sB', data[0:16])
+                    xf_index =  self.fixed_BIFF2_xfindex(cell_attr, rowx, colx)
+                    lenlen = 1
+                    tkarr_offset = 16
+                if verbose_formulas: # testing formula dumper
+                    #### XXXX FIXME
+                    fprintf(self.logfile, "FORMULA: rowx=%d colx=%d\n", rowx, colx)
+                    fmlalen = local_unpack("<H", data[20:22])[0]
+                    decompile_formula(bk, data[22:], fmlalen,
+                        reldelta=0, browx=rowx, bcolx=colx, verbose=1)
+                if result_str[6:8] == b'\xFF\xFF':
+                    if result_str[0]  == 0: #b'\x00':
+                        # need to read next record (STRING)
+                        gotstring = 0
+                        # if flags & 8:
+                        if 1: # "flags & 8" applies only to SHRFMLA
+                            # actually there's an optional SHRFMLA or ARRAY etc record to skip over
+                            rc2, data2_len, data2 = bk.get_record_parts()
+                            if rc2 == XL_STRING or rc2 == XL_STRING_B2:
+                                gotstring = 1
+                            elif rc2 == XL_ARRAY:
+                                row1x, rownx, col1x, colnx, array_flags, tokslen = \
+                                    local_unpack("<HHBBBxxxxxH", data2[:14])
+                                if verbose_formulas:
+                                    fprintf(self.logfile, "ARRAY: %d %d %d %d %d\n",
+                                        row1x, rownx, col1x, colnx, array_flags)
+                                    dump_formula(bk, data2[14:], tokslen, bv, reldelta=0, verbose=1)
+                            elif rc2 == XL_SHRFMLA:
+                                row1x, rownx, col1x, colnx, nfmlas, tokslen = \
+                                    local_unpack("<HHBBxBH", data2[:10])
+                                if verbose_formulas:
+                                    fprintf(self.logfile, "SHRFMLA (sub): %d %d %d %d %d\n",
+                                        row1x, rownx, col1x, colnx, nfmlas)
+                                    decompile_formula(bk, data2[10:], tokslen, reldelta=1, verbose=1)
+                            elif rc2 not in XL_SHRFMLA_ETC_ETC:
+                                raise XLRDError(
+                                    "Expected SHRFMLA, ARRAY, TABLEOP* or STRING record; found 0x%04x" % rc2)
+                            # if DEBUG: print "gotstring:", gotstring
+                        # now for the STRING record
+                        if not gotstring:
+                            rc2, _unused_len, data2 = bk.get_record_parts()
+                            if rc2 not in (XL_STRING, XL_STRING_B2):
+                                raise XLRDError("Expected STRING record; found 0x%04x" % rc2)
+                        # if DEBUG: print "STRING: data=%r BIFF=%d cp=%d" % (data2, self.biff_version, bk.encoding)
+                        if self.biff_version < BIFF_FIRST_UNICODE:
+                            strg = unpack_string(data2, 0, bk.encoding or bk.derive_encoding, lenlen=1 + int(bv > 20))
+                        else:
+                            strg = unpack_unicode(data2, 0, lenlen=2)
+                        self.put_cell(rowx, colx, XL_CELL_TEXT, strg, xf_index)
+                        # if DEBUG: print "FORMULA strg %r" % strg
+                    elif result_str[0] == 1: #b'\x01':
+                        # boolean formula result
+                        value = result_str[2]
+                        self.put_cell(rowx, colx, XL_CELL_BOOLEAN, value, xf_index)
+                    elif result_str[0] == 2: #b'\x02':
+                        # Error in cell
+                        value = result_str[2]
+                        self.put_cell(rowx, colx, XL_CELL_ERROR, value, xf_index)
+                    elif result_str[0] == 3:#b'\x03':
+                        # empty ... i.e. empty (zero-length) string, NOT an empty cell.
+                        self.put_cell(rowx, colx, XL_CELL_TEXT, "", xf_index)
+                    else:
+                        raise XLRDError("unexpected special case (0x%02x) in FORMULA" % result_str[0])
+                else:
+                    # it is a number
+                    d = local_unpack('<d', result_str)[0]
+                    self_put_number_cell(rowx, colx, d, xf_index)
+            elif rc == XL_BOOLERR:
+                rowx, colx, xf_index, value, is_err = local_unpack('<HHHBB', data[:8])
+                # Note OOo Calc 2.0 writes 9-byte BOOLERR records.
+                # OOo docs say 8. Excel writes 8.
+                cellty = (XL_CELL_BOOLEAN, XL_CELL_ERROR)[is_err]
+                # if DEBUG: print "XL_BOOLERR", rowx, colx, xf_index, value, is_err
+                self.put_cell(rowx, colx, cellty, value, xf_index)
+            elif rc == XL_COLINFO:
+                if not fmt_info: continue
+                c = Colinfo()
+                first_colx, last_colx, c.width, c.xf_index, flags \
+                    = local_unpack("<HHHHH", data[:10])
+                #### Colinfo.width is denominated in 256ths of a character,
+                #### *not* in characters.
+                if not(0 <= first_colx <= last_colx <= 256):
+                    # Note: 256 instead of 255 is a common mistake.
+                    # We silently ignore the non-existing 257th column in that case.
+                    print("*** NOTE: COLINFO record has first col index %d, last %d; " \
+                        "should have 0 <= first <= last <= 255 -- record ignored!" \
+                        % (first_colx, last_colx), file=self.logfile)
+                    del c
+                    continue
+                upkbits(c, flags, (
+                    ( 0, 0x0001, 'hidden'),
+                    ( 1, 0x0002, 'bit1_flag'),
+                    # *ALL* colinfos created by Excel in "default" cases are 0x0002!!
+                    # Maybe it's "locked" by analogy with XFProtection data.
+                    ( 8, 0x0700, 'outline_level'),
+                    (12, 0x1000, 'collapsed'),
+                    ))
+                for colx in range(first_colx, last_colx+1):
+                    if colx > 255: break # Excel does 0 to 256 inclusive
+                    self.colinfo_map[colx] = c
+                    if 0:
+                        fprintf(self.logfile,
+                            "**COL %d %d %d\n",
+                            self.number, colx, c.xf_index)
+                if verbose:
+                    fprintf(
+                        self.logfile,
+                        "COLINFO sheet #%d cols %d-%d: wid=%d xf_index=%d flags=0x%04x\n",
+                        self.number, first_colx, last_colx, c.width, c.xf_index, flags,
+                        )
+                    c.dump(self.logfile, header='===')
+            elif rc == XL_DEFCOLWIDTH:
+                self.defcolwidth, = local_unpack("<H", data[:2])
+                if 0: print('DEFCOLWIDTH', self.defcolwidth, file=self.logfile)
+            elif rc == XL_STANDARDWIDTH:
+                if data_len != 2:
+                    print('*** ERROR *** STANDARDWIDTH', data_len, repr(data), file=self.logfile)
+                self.standardwidth, = local_unpack("<H", data[:2])
+                if 0: print('STANDARDWIDTH', self.standardwidth, file=self.logfile)
+            elif rc == XL_GCW:
+                if not fmt_info: continue # useless w/o COLINFO
+                assert data_len == 34
+                assert data[0:2] == "\x20\x00"
+                iguff = unpack("<8i", data[2:34])
+                gcw = []
+                for bits in iguff:
+                    for j in range(32):
+                        gcw.append(bits & 1)
+                        bits >>= 1
+                self.gcw = tuple(gcw)
+                if 0:
+                    showgcw = "".join(["F "[x] for x in gcw]).rstrip().replace(' ', '.')
+                    print("GCW:", showgcw)
+            elif rc == XL_BLANK:
+                if not fmt_info: continue
+                rowx, colx, xf_index = local_unpack('<HHH', data[:6])
+                if 0: print("BLANK", rowx, colx, xf_index, file=self.logfile)
+                self_put_blank_cell(rowx, colx, xf_index)
+            elif rc == XL_MULBLANK: # 00BE
+                if not fmt_info: continue
+                mul_row, mul_first = local_unpack('<HH', data[0:4])
+                mul_last, = local_unpack('<H', data[-2:])
+                if 0:
+                    print("MULBLANK", mul_row, mul_first, mul_last, file=self.logfile)
+                pos = 4
+                for colx in range(mul_first, mul_last+1):
+                    xf_index, = local_unpack('<H', data[pos:pos+2])
+                    pos += 2
+                    self_put_blank_cell(mul_row, colx, xf_index)
+            elif rc == XL_DIMENSION or rc == XL_DIMENSION2:
+                # if data_len == 10:
+                # Was crashing on BIFF 4.0 file w/o the two trailing unused bytes.
+                # Reported by Ralph Heimburger.
+                if bv < 80:
+                    dim_tuple = local_unpack('<HxxH', data[2:8])
+                else:
+                    dim_tuple = local_unpack('<ixxH', data[4:12])
+                self.nrows, self.ncols = 0, 0
+                self._dimnrows, self._dimncols = dim_tuple
+                if not self.book._xf_epilogue_done:
+                    # Needed for bv <= 40
+                    self.book.xf_epilogue()
+                if verbose:
+                    fprintf(self.logfile,
+                        "sheet %d(%r) DIMENSIONS: ncols=%d nrows=%d\n",
+                        self.number, self.name, self._dimncols, self._dimnrows
+                        )
+            elif rc == XL_EOF:
+                DEBUG = 0
+                if DEBUG: print("SHEET.READ: EOF", file=self.logfile)
+                eof_found = 1
+                break
+            elif rc == XL_OBJ:
+                # handle SHEET-level objects; note there's a separate Book.handle_obj
+                self.handle_obj(data)
+            elif rc == XL_MSO_DRAWING:
+                self.handle_msodrawingetc(rc, data_len, data)
+            elif rc == XL_TXO:
+                self.handle_txo(data)
+            elif rc == XL_NOTE:
+                self.handle_note(data)
+            elif rc == XL_FEAT11:
+                self.handle_feat11(data)
+            elif rc in bofcodes: ##### EMBEDDED BOF #####
+                version, boftype = local_unpack('<HH', data[0:4])
+                if boftype != 0x20: # embedded chart
+                    print("*** Unexpected embedded BOF (0x%04x) at offset %d: version=0x%04x type=0x%04x" \
+                        % (rc, bk._position - data_len - 4, version, boftype), file=self.logfile)
+                while 1:
+                    code, data_len, data = bk.get_record_parts()
+                    if code == XL_EOF:
+                        break
+                if DEBUG: print("---> found EOF", file=self.logfile)
+            elif rc == XL_COUNTRY:
+                bk.handle_country(data)
+            elif rc == XL_LABELRANGES:
+                pos = 0
+                pos = unpack_cell_range_address_list_update_pos(
+                        self.row_label_ranges, data, pos, bv, addr_size=8,
+                        )
+                pos = unpack_cell_range_address_list_update_pos(
+                        self.col_label_ranges, data, pos, bv, addr_size=8,
+                        )
+                assert pos == data_len
+            elif rc == XL_ARRAY:
+                row1x, rownx, col1x, colnx, array_flags, tokslen = \
+                    local_unpack("<HHBBBxxxxxH", data[:14])
+                if verbose_formulas:
+                    print("ARRAY:", row1x, rownx, col1x, colnx, array_flags)
+                    dump_formula(bk, data[14:], tokslen, bv, reldelta=0, verbose=1)
+            elif rc == XL_SHRFMLA:
+                row1x, rownx, col1x, colnx, nfmlas, tokslen = \
+                    local_unpack("<HHBBxBH", data[:10])
+                if verbose_formulas:
+                    print("SHRFMLA (main):", row1x, rownx, col1x, colnx, nfmlas)
+                    decompile_formula(bk, data[10:], tokslen, reldelta=0, verbose=1)
+            elif rc == XL_CONDFMT:
+                if not fmt_info: continue
+                assert bv >= 80
+                num_CFs, needs_recalc, browx1, browx2, bcolx1, bcolx2 = \
+                    unpack("<6H", data[0:12])
+                if self.verbosity >= 1:
+                    fprintf(self.logfile,
+                        "\n*** WARNING: Ignoring CONDFMT (conditional formatting) record\n" \
+                        "*** in Sheet %d (%r).\n" \
+                        "*** %d CF record(s); needs_recalc_or_redraw = %d\n" \
+                        "*** Bounding box is %s\n",
+                        self.number, self.name, num_CFs, needs_recalc,
+                        rangename2d(browx1, browx2+1, bcolx1, bcolx2+1),
+                        )
+                olist = [] # updated by the function
+                pos = unpack_cell_range_address_list_update_pos(
+                    olist, data, 12, bv, addr_size=8)
+                # print >> self.logfile, repr(result), len(result)
+                if self.verbosity >= 1:
+                    fprintf(self.logfile,
+                        "*** %d individual range(s):\n" \
+                        "*** %s\n",
+                        len(olist),
+                        ", ".join([rangename2d(*coords) for coords in olist]),
+                        )
+            elif rc == XL_CF:
+                if not fmt_info: continue
+                cf_type, cmp_op, sz1, sz2, flags = unpack("<BBHHi", data[0:10])
+                font_block = (flags >> 26) & 1
+                bord_block = (flags >> 28) & 1
+                patt_block = (flags >> 29) & 1
+                if self.verbosity >= 1:
+                    fprintf(self.logfile,
+                        "\n*** WARNING: Ignoring CF (conditional formatting) sub-record.\n" \
+                        "*** cf_type=%d, cmp_op=%d, sz1=%d, sz2=%d, flags=0x%08x\n" \
+                        "*** optional data blocks: font=%d, border=%d, pattern=%d\n",
+                        cf_type, cmp_op, sz1, sz2, flags,
+                        font_block, bord_block, patt_block,
+                        )
+                # hex_char_dump(data, 0, data_len)
+                pos = 12
+                if font_block:
+                    (font_height, font_options, weight, escapement, underline,
+                    font_colour_index, two_bits, font_esc, font_underl) = \
+                    unpack("<64x i i H H B 3x i 4x i i i 18x", data[pos:pos+118])
+                    font_style = (two_bits > 1) & 1
+                    posture = (font_options > 1) & 1
+                    font_canc = (two_bits > 7) & 1
+                    cancellation = (font_options > 7) & 1
+                    if self.verbosity >= 1:
+                        fprintf(self.logfile,
+                            "*** Font info: height=%d, weight=%d, escapement=%d,\n" \
+                            "*** underline=%d, colour_index=%d, esc=%d, underl=%d,\n" \
+                            "*** style=%d, posture=%d, canc=%d, cancellation=%d\n",
+                            font_height, weight, escapement, underline,
+                            font_colour_index, font_esc, font_underl,
+                            font_style, posture, font_canc, cancellation,
+                            )
+                    pos += 118
+                if bord_block:
+                    pos += 8
+                if patt_block:
+                    pos += 4
+                fmla1 = data[pos:pos+sz1]
+                pos += sz1
+                if verbose and sz1:
+                    fprintf(self.logfile,
+                        "*** formula 1:\n",
+                        )
+                    dump_formula(bk, fmla1, sz1, bv, reldelta=0, verbose=1)
+                fmla2 = data[pos:pos+sz2]
+                pos += sz2
+                assert pos == data_len
+                if verbose and sz2:
+                    fprintf(self.logfile,
+                        "*** formula 2:\n",
+                        )
+                    dump_formula(bk, fmla2, sz2, bv, reldelta=0, verbose=1)
+            elif rc == XL_DEFAULTROWHEIGHT:
+                if data_len == 4:
+                    bits, self.default_row_height = unpack("<HH", data[:4])
+                elif data_len == 2:
+                    self.default_row_height, = unpack("<H", data)
+                    bits = 0
+                    fprintf(self.logfile,
+                        "*** WARNING: DEFAULTROWHEIGHT record len is 2, " \
+                        "should be 4; assuming BIFF2 format\n")
+                else:
+                    bits = 0
+                    fprintf(self.logfile,
+                        "*** WARNING: DEFAULTROWHEIGHT record len is %d, " \
+                        "should be 4; ignoring this record\n",
+                        data_len)
+                self.default_row_height_mismatch = bits & 1
+                self.default_row_hidden = (bits >> 1) & 1
+                self.default_additional_space_above = (bits >> 2) & 1
+                self.default_additional_space_below = (bits >> 3) & 1
+            elif rc == XL_MERGEDCELLS:
+                if not fmt_info: continue
+                pos = unpack_cell_range_address_list_update_pos(
+                    self.merged_cells, data, 0, bv, addr_size=8)
+                if verbose:
+                    fprintf(self.logfile,
+                        "MERGEDCELLS: %d ranges\n", int_floor_div(pos - 2, 8))
+                assert pos == data_len, \
+                    "MERGEDCELLS: pos=%d data_len=%d" % (pos, data_len)
+            elif rc == XL_WINDOW2:
+                if bv >= 80:
+                    (options,
+                    self.first_visible_rowx, self.first_visible_colx,
+                    self.gridline_colour_index,
+                    self.cached_page_break_preview_mag_factor,
+                    self.cached_normal_view_mag_factor
+                    ) = unpack("<HHHHxxHH", data[:14])
+                else: # BIFF3-7
+                    (options,
+                    self.first_visible_rowx, self.first_visible_colx,
+                    ) = unpack("<HHH", data[:6])
+                    self.gridline_colour_rgb = unpack("<BBB", data[6:9])
+                    self.gridline_colour_index = \
+                        nearest_colour_index(
+                            self.book.colour_map,
+                            self.gridline_colour_rgb,
+                            debug=0)
+                    self.cached_page_break_preview_mag_factor = 0 # default (60%)
+                    self.cached_normal_view_mag_factor = 0 # default (100%)
+                # options -- Bit, Mask, Contents:
+                # 0 0001H 0 = Show formula results 1 = Show formulas
+                # 1 0002H 0 = Do not show grid lines 1 = Show grid lines
+                # 2 0004H 0 = Do not show sheet headers 1 = Show sheet headers
+                # 3 0008H 0 = Panes are not frozen 1 = Panes are frozen (freeze)
+                # 4 0010H 0 = Show zero values as empty cells 1 = Show zero values
+                # 5 0020H 0 = Manual grid line colour 1 = Automatic grid line colour
+                # 6 0040H 0 = Columns from left to right 1 = Columns from right to left
+                # 7 0080H 0 = Do not show outline symbols 1 = Show outline symbols
+                # 8 0100H 0 = Keep splits if pane freeze is removed 1 = Remove splits if pane freeze is removed
+                # 9 0200H 0 = Sheet not selected 1 = Sheet selected (BIFF5-BIFF8)
+                # 10 0400H 0 = Sheet not visible 1 = Sheet visible (BIFF5-BIFF8)
+                # 11 0800H 0 = Show in normal view 1 = Show in page break preview (BIFF8)
+                # The freeze flag specifies, if a following PANE record (6.71) describes unfrozen or frozen panes.
+                for attr, _unused_defval in _WINDOW2_options:
+                    setattr(self, attr, options & 1)
+                    options >>= 1
+                # print "WINDOW2: visible=%d selected=%d" \
+                #     % (self.sheet_visible, self.sheet_selected)
+            #### all of the following are for BIFF <= 4W
+            elif bv <= 45:
+                if rc == XL_FORMAT or rc == XL_FORMAT2:
+                    bk.handle_format(data, rc)
+                elif rc == XL_FONT or rc == XL_FONT_B3B4:
+                    bk.handle_font(data)
+                elif rc == XL_STYLE:
+                    if not self.book._xf_epilogue_done:
+                        self.book.xf_epilogue()
+                    bk.handle_style(data)
+                elif rc == XL_PALETTE:
+                    bk.handle_palette(data)
+                elif rc == XL_BUILTINFMTCOUNT:
+                    bk.handle_builtinfmtcount(data)
+                elif rc == XL_XF4 or rc == XL_XF3 or rc == XL_XF2: #### N.B. not XL_XF
+                    bk.handle_xf(data)
+                elif rc == XL_DATEMODE:
+                    bk.handle_datemode(data)
+                elif rc == XL_CODEPAGE:
+                    bk.handle_codepage(data)
+                elif rc == XL_FILEPASS:
+                    bk.handle_filepass(data)
+                elif rc == XL_WRITEACCESS:
+                    bk.handle_writeaccess(data)
+                elif rc == XL_IXFE:
+                    self._ixfe = local_unpack('<H', data)[0]
+                elif rc == XL_NUMBER_B2:
+                    rowx, colx, cell_attr, d = local_unpack('<HH3sd', data)
+                    self_put_number_cell(rowx, colx, d, self.fixed_BIFF2_xfindex(cell_attr, rowx, colx))
+                elif rc == XL_INTEGER:
+                    rowx, colx, cell_attr, d = local_unpack('<HH3sH', data)
+                    self_put_number_cell(rowx, colx, float(d), self.fixed_BIFF2_xfindex(cell_attr, rowx, colx))
+                elif rc == XL_LABEL_B2:
+                    rowx, colx, cell_attr = local_unpack('<HH3s', data[0:7])
+                    strg = unpack_string(data, 7, bk.encoding or bk.derive_encoding(), lenlen=1)
+                    self_put_cell(rowx, colx, XL_CELL_TEXT, strg, self.fixed_BIFF2_xfindex(cell_attr, rowx, colx))
+                elif rc == XL_BOOLERR_B2:
+                    rowx, colx, cell_attr, value, is_err = local_unpack('<HH3sBB', data)
+                    cellty = (XL_CELL_BOOLEAN, XL_CELL_ERROR)[is_err]
+                    # if DEBUG: print "XL_BOOLERR_B2", rowx, colx, cell_attr, value, is_err
+                    self.put_cell(rowx, colx, cellty, value, self.fixed_BIFF2_xfindex(cell_attr, rowx, colx))
+                elif rc == XL_BLANK_B2:
+                    if not fmt_info: continue
+                    rowx, colx, cell_attr = local_unpack('<HH3s', data[:7])
+                    self_put_blank_cell(rowx, colx, self.fixed_BIFF2_xfindex(cell_attr, rowx, colx))
+                elif rc == XL_EFONT:
+                    bk.handle_efont(data)
+                elif rc == XL_ROW_B2:
+                    if not fmt_info: continue
+                    rowx, bits1, has_defaults = local_unpack('<H4xH2xB', data[0:11])
+                    if not(0 <= rowx < self.utter_max_rows):
+                        print("*** NOTE: ROW_B2 record has row index %d; " \
+                            "should have 0 <= rowx < %d -- record ignored!" \
+                            % (rowx, self.utter_max_rows), file=self.logfile)
+                        continue
+                    r = Rowinfo()
+                    r.height = bits1 & 0x7fff
+                    r.has_default_height = (bits1 >> 15) & 1
+                    r.outline_level = 0
+                    r.outline_group_starts_ends = 0
+                    r.hidden = 0
+                    r.height_mismatch = 0
+                    r.has_default_xf_index = has_defaults & 1
+                    r.additional_space_above = 0
+                    r.additional_space_below = 0
+                    if not r.has_default_xf_index:
+                        r.xf_index = -1
+                    elif data_len == 18:
+                        # Seems the XF index in the cell_attr is dodgy
+                        xfx = local_unpack('<H', data[16:18])[0]
+                        r.xf_index = self.fixed_BIFF2_xfindex(cell_attr=None, rowx=rowx, colx=-1, true_xfx=xfx)
+                    else:
+                        cell_attr = data[13:16]
+                        r.xf_index = self.fixed_BIFF2_xfindex(cell_attr, rowx, colx=-1)
+                    self.rowinfo_map[rowx] = r
+                    if 0 and r.xf_index > -1:
+                        fprintf(self.logfile,
+                            "**ROW %d %d %d\n",
+                            self.number, rowx, r.xf_index)
+                    if verbose_rows:
+                        print('ROW_B2', rowx, bits1, has_defaults, file=self.logfile)
+                        r.dump(self.logfile,
+                            header="--- sh #%d, rowx=%d ---" % (self.number, rowx))
+                elif rc == XL_COLWIDTH: # BIFF2 only
+                    if not fmt_info: continue
+                    first_colx, last_colx, width\
+                        = local_unpack("<BBH", data[:4])
+                    if not(first_colx <= last_colx):
+                        print("*** NOTE: COLWIDTH record has first col index %d, last %d; " \
+                            "should have first <= last -- record ignored!" \
+                            % (first_colx, last_colx), file=self.logfile)
+                        continue
+                    for colx in range(first_colx, last_colx+1):
+                        if colx in self.colinfo_map:
+                            c = self.colinfo_map[colx]
+                        else:
+                            c = Colinfo()
+                            self.colinfo_map[colx] = c
+                        c.width = width
+                    if verbose:
+                        fprintf(
+                            self.logfile,
+                            "COLWIDTH sheet #%d cols %d-%d: wid=%d\n",
+                            self.number, first_colx, last_colx, width
+                            )
+                elif rc == XL_COLUMNDEFAULT: # BIFF2 only
+                    if not fmt_info: continue
+                    first_colx, last_colx = local_unpack("<HH", data[:4])
+                    #### Warning OOo docs wrong; first_colx <= colx < last_colx
+                    if verbose:
+                        fprintf(
+                            self.logfile,
+                            "COLUMNDEFAULT sheet #%d cols in range(%d, %d)\n",
+                            self.number, first_colx, last_colx
+                            )
+                    if not(0 <= first_colx < last_colx <= 256):
+                        print("*** NOTE: COLUMNDEFAULT record has first col index %d, last %d; " \
+                            "should have 0 <= first < last <= 256" \
+                            % (first_colx, last_colx), file=self.logfile)
+                        last_colx = min(last_colx, 256)
+                    for colx in range(first_colx, last_colx):
+                        offset = 4 + 3 * (colx - first_colx)
+                        cell_attr = data[offset:offset+3]
+                        xf_index = self.fixed_BIFF2_xfindex(cell_attr, rowx=-1, colx=colx)
+                        if colx in self.colinfo_map:
+                            c = self.colinfo_map[colx]
+                        else:
+                            c = Colinfo()
+                            self.colinfo_map[colx] = c
+                        c.xf_index = xf_index
+        if not eof_found:
+            raise XLRDError("Sheet %d (%r) missing EOF record" \
+                % (self.number, self.name))
+        self.tidy_dimensions()
+        bk._position = oldpos
+        return 1
+
+    def fixed_BIFF2_xfindex(self, cell_attr, rowx, colx, true_xfx=None):
+        DEBUG = 0
+        verbose = DEBUG or self.verbosity >= 2
+        if self.biff_version == 21:
+            if self._xf_index_to_xl_type_map:
+                if true_xfx is not None:
+                    xfx = true_xfx
+                else:
+                    xfx = cell_attr[0] & 0x3F
+                if xfx == 0x3F:
+                    if self._ixfe is None:
+                        raise XLRDError("BIFF2 cell record has XF index 63 but no preceding IXFE record.")
+                    xfx = self._ixfe
+                    # OOo docs are capable of interpretation that each
+                    # cell record is preceded immediately by its own IXFE record.
+                    # Empirical evidence is that (sensibly) an IXFE record applies to all
+                    # following cell records until another IXFE comes along.
+                return xfx
+            # Have either Excel 2.0, or broken 2.1 w/o XF records -- same effect.
+            self.biff_version = self.book.biff_version = 20
+        #### check that XF slot in cell_attr is zero
+        xfx_slot = cell_attr[0] & 0x3F
+        assert xfx_slot == 0
+        xfx = self._cell_attr_to_xfx.get(cell_attr)
+        if xfx is not None:
+            return xfx
+        if verbose:
+            fprintf(self.logfile, "New cell_attr %r at (%r, %r)\n", cell_attr, rowx, colx)
+        book = self.book
+        xf = self.fake_XF_from_BIFF20_cell_attr(cell_attr)
+        xfx = len(book.xf_list)
+        xf.xf_index = xfx
+        book.xf_list.append(xf)
+        if verbose:
+            xf.dump(self.logfile, header="=== Faked XF %d ===" % xfx, footer="======")
+        if xf.format_key not in book.format_map:
+            msg = "ERROR *** XF[%d] unknown format key (%d, 0x%04x)\n"
+            fprintf(self.logfile, msg,
+                    xf.xf_index, xf.format_key, xf.format_key)
+            fmt = Format(xf.format_key, FUN, "General")
+            book.format_map[xf.format_key] = fmt
+            while len(book.format_list) <= xf.format_key:
+                book.format_list.append(fmt)
+        cellty_from_fmtty = {
+            FNU: XL_CELL_NUMBER,
+            FUN: XL_CELL_NUMBER,
+            FGE: XL_CELL_NUMBER,
+            FDT: XL_CELL_DATE,
+            FTX: XL_CELL_NUMBER, # Yes, a number can be formatted as text.
+            }
+        fmt = book.format_map[xf.format_key]
+        cellty = cellty_from_fmtty[fmt.type]
+        self._xf_index_to_xl_type_map[xf.xf_index] = cellty
+        self._cell_attr_to_xfx[cell_attr] = xfx
+        return xfx
+
+    def fake_XF_from_BIFF20_cell_attr(self, cell_attr):
+        from .formatting import XF, XFAlignment, XFBorder, XFBackground, XFProtection
+        xf = XF()
+        xf.alignment = XFAlignment()
+        xf.alignment.indent_level = 0
+        xf.alignment.shrink_to_fit = 0
+        xf.alignment.text_direction = 0
+        xf.border = XFBorder()
+        xf.border.diag_up = 0
+        xf.border.diag_down = 0
+        xf.border.diag_colour_index = 0
+        xf.border.diag_line_style = 0 # no line
+        xf.background = XFBackground()
+        xf.protection = XFProtection()
+        (prot_bits, font_and_format, halign_etc) = unpack('<BBB', cell_attr)
+        xf.format_key = font_and_format & 0x3F
+        xf.font_index = (font_and_format & 0xC0) >> 6
+        upkbits(xf.protection, prot_bits, (
+            (6, 0x40, 'cell_locked'),
+            (7, 0x80, 'formula_hidden'),
+            ))
+        xf.alignment.hor_align = halign_etc & 0x07
+        for mask, side in ((0x08, 'left'), (0x10, 'right'), (0x20, 'top'), (0x40, 'bottom')):
+            if halign_etc & mask:
+                colour_index, line_style = 8, 1 # black, thin
+            else:
+                colour_index, line_style = 0, 0 # none, none
+            setattr(xf.border, side + '_colour_index', colour_index)
+            setattr(xf.border, side + '_line_style', line_style)
+        bg = xf.background
+        if halign_etc & 0x80:
+            bg.fill_pattern = 17
+        else:
+            bg.fill_pattern = 0
+        bg.background_colour_index = 9 # white
+        bg.pattern_colour_index = 8 # black
+        xf.parent_style_index = 0 # ???????????
+        xf.alignment.vert_align = 2 # bottom
+        xf.alignment.rotation = 0
+        for attr_stem in ("format", "font", "alignment", "border", \
+                          "background", "protection"):
+            attr = "_%s_flag" % attr_stem
+            setattr(xf, attr, 1)
+        return xf
+
+    def req_fmt_info(self):
+        if not self.formatting_info:
+            raise XLRDError("Feature requires open_workbook(..., formatting_info=True)")
+
+    # Determine column display width.
+    # - New in version 0.6.1
+    #
+    # @param colx Index of the queried column, range 0 to 255.
+    # Note that it is possible to find out the width that will be used to display
+    # columns with no cell information e.g. column IV (colx=255).
+    # @return The column width that will be used for displaying
+    # the given column by Excel, in units of 1/256th of the width of a
+    # standard character (the digit zero in the first font).
+
+    def computed_column_width(self, colx):
+        self.req_fmt_info()
+        if self.biff_version >= 80:
+            colinfo = self.colinfo_map.get(colx, None)
+            if colinfo is not None:
+                return colinfo.width
+            if self.standardwidth is not None:
+                return self.standardwidth
+        elif self.biff_version >= 40:
+            if self.gcw[colx]:
+                if self.standardwidth is not None:
+                    return self.standardwidth
+            else:
+                colinfo = self.colinfo_map.get(colx, None)
+                if colinfo is not None:
+                    return colinfo.width
+        elif self.biff_version == 30:
+            colinfo = self.colinfo_map.get(colx, None)
+            if colinfo is not None:
+                return colinfo.width
+        # All roads lead to Rome and the DEFCOLWIDTH ...
+        if self.defcolwidth is not None:
+            return self.defcolwidth * 256
+        return 8 * 256 # 8 is what Excel puts in a DEFCOLWIDTH record
+
+    def handle_msodrawingetc(self, recid, data_len, data):
+        if not OBJ_MSO_DEBUG:
+            return
+        DEBUG = 1
+        if self.biff_version < 80:
+            return
+        o = MSODrawing()
+        pos = 0
+        while pos < data_len:
+            tmp, fbt, cb = unpack('<HHI', data[pos:pos+8])
+            ver = tmp & 0xF
+            inst = (tmp >> 4) & 0xFFF
+            if ver == 0xF:
+                ndb = 0 # container
+            else:
+                ndb = cb
+            if DEBUG:
+                hex_char_dump(data, pos, ndb + 8, base=0, fout=self.logfile)
+                fprintf(self.logfile,
+                    "fbt:0x%04X  inst:%d  ver:0x%X  cb:%d (0x%04X)\n",
+                    fbt, inst, ver, cb, cb)
+            if fbt == 0xF010: # Client Anchor
+                assert ndb == 18
+                (o.anchor_unk,
+                o.anchor_colx_lo, o.anchor_rowx_lo,
+                o.anchor_colx_hi, o.anchor_rowx_hi) = unpack('<Hiiii', data[pos+8:pos+8+ndb])
+            elif fbt == 0xF011: # Client Data
+                # must be followed by an OBJ record
+                assert cb == 0
+                assert pos + 8 == data_len
+            else:
+                pass
+            pos += ndb + 8
+        else:
+            # didn't break out of while loop
+            assert pos == data_len
+        if DEBUG:
+            o.dump(self.logfile, header="=== MSODrawing ===", footer= " ")
+
+
+    def handle_obj(self, data):
+        if not OBJ_MSO_DEBUG:
+            return
+        DEBUG = 1
+        if self.biff_version < 80:
+            return
+        o = MSObj()
+        data_len = len(data)
+        pos = 0
+        if DEBUG:
+            fprintf(self.logfile, "... OBJ record ...\n")
+        while pos < data_len:
+            ft, cb = unpack('<HH', data[pos:pos+4])
+            if DEBUG:
+                hex_char_dump(data, pos, cb, base=0, fout=self.logfile)
+            if ft == 0x15: # ftCmo ... s/b first
+                assert pos == 0
+                o.type, o.id, option_flags = unpack('<HHH', data[pos+4:pos+10])
+                upkbits(o, option_flags, (
+                    ( 0, 0x0001, 'locked'),
+                    ( 4, 0x0010, 'printable'),
+                    ( 8, 0x0100, 'autofilter'), # not documented in Excel 97 dev kit
+                    ( 9, 0x0200, 'scrollbar_flag'), # not documented in Excel 97 dev kit
+                    (13, 0x2000, 'autofill'),
+                    (14, 0x4000, 'autoline'),
+                    ))
+            elif ft == 0x00:
+                assert cb == 0
+                assert pos + 4 == data_len
+            elif ft == 0x0C: # Scrollbar
+                values = unpack('<5H', data[pos+8:pos+18])
+                for value, tag in zip(values, ('value', 'min', 'max', 'inc', 'page')):
+                    setattr(o, 'scrollbar_' + tag, value)
+            elif ft == 0x0D: # "Notes structure" [used for cell comments]
+                pass ############## not documented in Excel 97 dev kit
+            elif ft == 0x13: # list box data
+                if o.autofilter: # non standard exit. NOT documented
+                    break
+            else:
+                pass
+            pos += cb + 4
+        else:
+            # didn't break out of while loop
+            assert pos == data_len
+        if DEBUG:
+            o.dump(self.logfile, header="=== MSOBj ===", footer= " ")
+
+    def handle_note(self, data):
+        if not OBJ_MSO_DEBUG:
+            return
+        DEBUG = 1
+        if self.biff_version < 80:
+            return
+        if DEBUG:
+            fprintf(self.logfile, '... NOTE record ...\n')
+            hex_char_dump(data, 0, len(data), base=0, fout=self.logfile)
+        o = MSNote()
+        data_len = len(data)
+        o.rowx, o.colx, option_flags, o.object_id = unpack('<4H', data[:8])
+        o.show = (option_flags >> 1) & 1
+        # Docs say NULL [sic] bytes padding between string count and string data
+        # to ensure that string is word-aligned. Appears to be nonsense.
+        # There also seems to be a random(?) byte after the string (not counted in the
+        # string length.
+        o.original_author, endpos = unpack_unicode_update_pos(data, 8, lenlen=2)
+        assert endpos == data_len - 1
+        o.last_byte = data[-1]
+        if DEBUG:
+            o.dump(self.logfile, header="=== MSNote ===", footer= " ")
+
+    def handle_txo(self, data):
+        if not OBJ_MSO_DEBUG:
+            return
+        DEBUG = 1
+        if self.biff_version < 80:
+            return
+        o = MSTxo()
+        data_len = len(data)
+        option_flags, o.rot, cchText, cbRuns = unpack('<HH6xHH4x', data)
+        upkbits(o, option_flags, (
+            (3, 0x000E, 'horz_align'),
+            (6, 0x0070, 'vert_align'),
+            (9, 0x0200, 'lock_text'),
+            ))
+        rc2, data2_len, data2 = self.book.get_record_parts()
+        assert rc2 == XL_CONTINUE
+        o.text, endpos = unpack_unicode_update_pos(data2, 0, known_len=cchText)
+        assert endpos == data2_len
+        rc3, data3_len, data3 = self.book.get_record_parts()
+        assert rc3 == XL_CONTINUE
+        # ignore the formatting runs for the moment
+        if DEBUG:
+            o.dump(self.logfile, header="=== MSTxo ===", footer= " ")
+
+    def handle_feat11(self, data):
+        if not OBJ_MSO_DEBUG:
+            return
+        # rt: Record type; this matches the BIFF rt in the first two bytes of the record; =0872h
+        # grbitFrt: FRT cell reference flag (see table below for details)
+        # Ref0: Range reference to a worksheet cell region if grbitFrt=1 (bitFrtRef). Otherwise blank.
+        # isf: Shared feature type index =5 for Table
+        # fHdr: =0 since this is for feat not feat header
+        # reserved0: Reserved for future use =0 for Table
+        # cref: Count of ref ranges this feature is on
+        # cbFeatData: Count of byte for the current feature data.
+        # reserved1: =0 currently not used
+        # Ref1: Repeat of Ref0. UNDOCUMENTED
+        rt, grbitFrt, Ref0, isf, fHdr, reserved0, cref, cbFeatData, reserved1, Ref1 = unpack('<HH8sHBiHiH8s', data[0:35])
+        assert reserved0 == 0
+        assert reserved1 == 0
+        assert isf == 5
+        assert rt == 0x872
+        assert fHdr == 0
+        assert Ref1 == Ref0
+        print("FEAT11: grbitFrt=%d  Ref0=%r cref=%d cbFeatData=%d" % (grbitFrt, Ref0, cref, cbFeatData))
+        # lt: Table data source type:
+        #   =0 for Excel Worksheet Table =1 for read-write SharePoint linked List
+        #   =2 for XML mapper Table =3 for Query Table
+        # idList: The ID of the Table (unique per worksheet)
+        # crwHeader: How many header/title rows the Table has at the top
+        # crwTotals: How many total rows the Table has at the bottom
+        # idFieldNext: Next id to try when assigning a unique id to a new field
+        # cbFSData: The size of the Fixed Data portion of the Table data structure.
+        # rupBuild: the rupBuild that generated the record
+        # unusedShort: UNUSED short that can be used later. The value is reserved during round-tripping.
+        # listFlags: Collection of bit flags: (see listFlags' bit setting table below for detail.)
+        # lPosStmCache: Table data stream position of cached data
+        # cbStmCache: Count of bytes of cached data
+        # cchStmCache: Count of characters of uncompressed cached data in the stream
+        # lem: Table edit mode (see List (Table) Editing Mode (lem) setting table below for details.)
+        # rgbHashParam: Hash value for SharePoint Table
+        # cchName: Count of characters in the Table name string rgbName
+        (lt, idList, crwHeader, crwTotals, idFieldNext, cbFSData,
+        rupBuild, unusedShort, listFlags, lPosStmCache, cbStmCache,
+        cchStmCache, lem, rgbHashParam, cchName) = unpack('<iiiiiiHHiiiii16sH', data[35:35+66])
+        print("lt=%d  idList=%d crwHeader=%d  crwTotals=%d  idFieldNext=%d cbFSData=%d\n"\
+            "rupBuild=%d  unusedShort=%d listFlags=%04X  lPosStmCache=%d  cbStmCache=%d\n"\
+            "cchStmCache=%d  lem=%d  rgbHashParam=%r  cchName=%d" % (
+            lt, idList, crwHeader, crwTotals, idFieldNext, cbFSData,
+            rupBuild, unusedShort,listFlags, lPosStmCache, cbStmCache,
+            cchStmCache, lem, rgbHashParam, cchName))
+
+class MSODrawing(BaseObject):
+    pass
+
+class MSObj(BaseObject):
+    pass
+
+class MSTxo(BaseObject):
+    pass
+
+class MSNote(BaseObject):
+    pass
+
+# === helpers ===
+
+def unpack_RK(rk_str):
+    #(to_py3): flags = ord(rk_str[0])
+    flags = rk_str[0]
+    if flags & 2:
+        # There's a SIGNED 30-bit integer in there!
+        i,  = unpack('<i', rk_str)
+        i >>= 2 # div by 4 to drop the 2 flag bits
+        if flags & 1:
+            return i / 100.0
+        return float(i)
+    else:
+        # It's the most significant 30 bits of an IEEE 754 64-bit FP number
+        # (to_py3): replaced b'\0\0\0\0' + chr(flags & 252) + rk_str[1:4]
+        _bytes = array('B', b'\0\0\0\0')
+        _bytes.append(flags & 252)
+        _bytes.extend(rk_str[1:4])
+        d, = unpack('<d', _bytes)
+        if flags & 1:
+            d = d / 100.
+        return d
+
+##### =============== Cell ======================================== #####
+
+cellty_from_fmtty = {
+    FNU: XL_CELL_NUMBER,
+    FUN: XL_CELL_NUMBER,
+    FGE: XL_CELL_NUMBER,
+    FDT: XL_CELL_DATE,
+    FTX: XL_CELL_NUMBER, # Yes, a number can be formatted as text.
+    }
+
+ctype_text = {
+    XL_CELL_EMPTY: 'empty',
+    XL_CELL_TEXT: 'text',
+    XL_CELL_NUMBER: 'number',
+    XL_CELL_DATE: 'xldate',
+    XL_CELL_BOOLEAN: 'bool',
+    XL_CELL_ERROR: 'error',
+    XL_CELL_BLANK: 'blank',
+    }
+
+# Contains the data for one cell -> see XFCell() class in the xfcell module.
+class Cell(XFCell):
+    def __repr__(self):
+        if not self.has_xf:
+            return "%s:%r" % (ctype_text[self.ctype], self.value)
+        else:
+            return "%s:%r (XF:%r)" % (ctype_text[self.ctype], self.value, self.xf_index)
+
+# There is one and only one instance of an empty cell -- it's a singleton. This is it.
+# You may use a test like "acell is empty_cell".
+empty_cell = Cell(XL_CELL_EMPTY, '')
+
+##### =============== Colinfo and Rowinfo ============================== #####
+
+
+# Width and default formatting information that applies to one or
+# more columns in a sheet. Derived from COLINFO records.
+#
+#
+# Here is the default hierarchy for width, according to the OOo docs:
+#
+# In BIFF3, if a COLINFO record is missing for a column,
+# the width specified in the record DEFCOLWIDTH is used instead.
+#
+# In BIFF4-BIFF7, the width set in this [COLINFO] record is only used,
+# if the corresponding bit for this column is cleared in the GCW
+# record, otherwise the column width set in the DEFCOLWIDTH record
+# is used (the STANDARDWIDTH record is always ignored in this case [see footnote!]).
+#
+# In BIFF8, if a COLINFO record is missing for a column,
+# the width specified in the record STANDARDWIDTH is used.
+# If this [STANDARDWIDTH] record is also missing,
+# the column width of the record DEFCOLWIDTH is used instead.
+#
+# Footnote:  The docs on the GCW record say this:
+#
+# If a bit is set, the corresponding column uses the width set in the STANDARDWIDTH
+# record. If a bit is cleared, the corresponding column uses the width set in the
+# COLINFO record for this column.
+#
+# If a bit is set, and the worksheet does not contain the STANDARDWIDTH record, or if
+# the bit is cleared, and the worksheet does not contain the COLINFO record, the DEFCOLWIDTH
+# record of the worksheet will be used instead.
+#
+# At the moment (2007-01-17) xlrd is going with the GCW version of the story.
+# Reference to the source may be useful: see the computed_column_width(colx) method
+# of the Sheet class.
+# - New in version 0.6.1
+
+class Colinfo(BaseObject):
+    # Width of the column in 1/256 of the width of the zero character,
+    # using default font (first FONT record in the file).
+    width = 0
+    # XF index to be used for formatting empty cells.
+    xf_index = -1
+    # 1 = column is hidden
+    hidden = 0
+    # Value of a 1-bit flag whose purpose is unknown
+    # but is often seen set to 1
+    bit1_flag = 0
+    # Outline level of the column, in range(7).
+    # (0 = no outline)
+    outline_level = 0
+    # 1 = column is collapsed
+    collapsed = 0
+
+# Height and default formatting information that applies to a row in a sheet.
+# Derived from ROW records.
+# - New in version 0.6.1
+
+class Rowinfo(BaseObject):
+    ##
+    # Height of the row, in twips. One twip == 1/20 of a point
+    height = 0
+    ##
+    # 0 = Row has custom height; 1 = Row has default height
+    has_default_height = 0
+    ##
+    # Outline level of the row
+    outline_level = 0
+    ##
+    # 1 = Outline group starts or ends here (depending on where the
+    # outline buttons are located, see WSBOOL record [TODO ??]),
+    # <i>and</i> is collapsed
+    outline_group_starts_ends = 0
+    ##
+    # 1 = Row is hidden (manually, or by a filter or outline group)
+    hidden = 0
+    ##
+    # 1 = Row height and default font height do not match
+    height_mismatch = 0
+    ##
+    # 1 = the xf_index attribute is usable; 0 = ignore it
+    has_default_xf_index = 0
+    ##
+    # Index to default XF record for empty cells in this row.
+    # Don't use this if has_default_xf_index == 0.
+    xf_index = -9999
+    ##
+    # This flag is set, if the upper border of at least one cell in this row
+    # or if the lower border of at least one cell in the row above is
+    # formatted with a thick line style. Thin and medium line styles are not
+    # taken into account.
+    additional_space_above = 0
+    ##
+    # This flag is set, if the lower border of at least one cell in this row
+    # or if the upper border of at least one cell in the row below is
+    # formatted with a medium or thick line style. Thin line styles are not
+    # taken into account.
+    additional_space_below = 0
diff --git a/tablib/packages/xlrd3/xfcell.py b/tablib/packages/xlrd3/xfcell.py
new file mode 100644
index 0000000..213b4bd
--- /dev/null
+++ b/tablib/packages/xlrd3/xfcell.py
@@ -0,0 +1,276 @@
+# Author:  mozman <mozman@gmx.at>
+# Purpose: xfcell -- cell with convenient xf function
+# Created: 04.12.2010
+# Copyright (C) 2010, Manfred Moitzi
+# License: BSD-style licence
+
+"""
+The XFCell() object contains the data for one cell.
+
+WARNING: You don't call this class yourself. You access Cell objects
+via methods of the Sheet object(s) that you found in the Book object that
+was returned when you called xlrd.open_workbook("myfile.xls").
+
+Cell objects have four attributes: `ctype` is an int, `value` (which depends
+on `ctype`), `xf_index` and `sheet`, a reference to the containing sheet. If
+**formatting_info** is not enabled when the workbook is opened, xf_index will
+be **None**.
+
+The following table describes the types of cells and how their values
+are represented in Python.
+
+=============== ===== ============ ==========================================
+Type symbol     Const Python value Note
+=============== ===== ============ ==========================================
+XL_CELL_EMPTY   0     ""
+XL_CELL_TEXT    1     str
+XL_CELL_NUMBER  2     float
+XL_CELL_DATE    3     float
+XL_CELL_BOOLEAN 4     int          1 means TRUE, 0 means FALSE
+XL_CELL_ERROR   5     int          representing internal Excel codes; for a
+                                   text representation, refer to the supplied
+                                   dictionary error_text_from_code
+XL_CELL_BLANK   6     ""           this type will appear only when
+                                   open_workbook(..., formatting_info=True)
+                                   is used.
+=============== ===== ============ ==========================================
+"""
+
+import datetime
+
+from .xldate import xldate_as_tuple
+from .biffh import XL_CELL_DATE, BaseObject
+
+class XFCell(BaseObject):
+    """ Extended Cell() class with convenient methods for easy access of cell
+    properties.
+    """
+    __slots__ = ['sheet', 'ctype', 'value', 'xf']
+
+    def __init__(self, ctype, value, xf_index=None, sheet=None):
+        self.sheet = sheet
+        self.ctype = ctype
+        self.value = value
+
+        if xf_index is not None:
+            self.xf = self.book.xf_list[xf_index]
+        else:
+            self.xf = None
+
+    @property
+    def book(self):
+        return self.sheet.book
+
+    @property
+    def has_xf(self):
+        return (self.xf is not None)
+
+    @property
+    def xf_index(self):
+        if self.has_xf:
+            return self.xf.xf_index
+        else:
+            return None
+
+    @property
+    def parent_style(self):
+        return self.book.xf_list[self.xf.parent_style_index]
+
+    @property
+    def is_datetime(self):
+        return self.ctype == XL_CELL_DATE
+
+    @property
+    def has_date(self):
+        if self.is_datetime:
+            return self.value > 1.
+        return False
+
+    def get_color(self, index):
+        return self.book.colour_map[index]
+
+    def datetime(self):
+        """ Returns a datetime.datetime object if cell type is XL_CELL_DATE
+        else raises a TypeError, and raises ValueError if the the cell has
+        not date value (only time value is present).
+        """
+        if self.is_datetime:
+            if self.has_date:
+                date = xldate_as_tuple(self.value, self.book.datemode)
+                return datetime.datetime(*date)
+            else:
+                raise ValueError("Cell has no date value.")
+        else:
+            raise TypeError("Cell is not a XL_CELL_DATE.")
+
+    def date(self):
+        """ Returns a datetime.date object if cell type is XL_CELL_DATE
+        else raises a **TypeError**. Raises **ValueError** if the cell
+        doesn't have a date value (only time value is present).
+        """
+        dt = self.datetime()
+        return dt.date()
+
+    def time(self):
+        """ Returns a datetime.time object if cell type is XL_CELL_DATE else
+        raises a TypeError.
+        """
+        if self.is_datetime:
+            date = xldate_as_tuple(self.value, self.book.datemode)
+            return datetime.time(date[3], date[4], date[5])
+        else:
+            raise TypeError("Cell is not a XL_CELL_DATE.")
+
+    #
+    # access the XFBackground() class
+    #
+
+    @property
+    def background(self):
+        if self.xf.is_style and \
+           self.xf._background_flag == 0:
+            return self.xf.background
+        elif self.xf._background_flag:
+            return self.xf.background
+        else:
+            return self.parent_style.background
+
+    def background_color(self):
+        """ Get cell background-color as 3-tuple. """
+        color_index = self.xf.background.background_colour_index
+        return self.get_color(color_index)
+
+    def fill_pattern(self):
+        return self.xf.background.fill_pattern
+
+    def pattern_color(self):
+        color_index = self.xf.background.pattern_colour_index
+        return self.get_color(color_index)
+
+    #
+    # access the Font() class
+    #
+
+    @property
+    def font_index(self):
+        if self.xf.is_style and \
+           self.xf._font_flag == 0:
+            return self.xf.font_index
+        elif self.xf._font_flag:
+            return self.xf.font_index
+        else:
+            return self.parent_style.font_index
+
+    @property
+    def font(self):
+        """ Get the Font() class. """
+        return self.book.font_list[self.xf.font_index]
+
+    def font_color(self):
+        """ Get cell foreground-color as 3-tuple. """
+        return self.get_color(self.font.colour_index)
+
+    #
+    # access the Format() class
+    #
+
+    @property
+    def format_key(self):
+        if self.xf.is_style and \
+           self.xf._format_flag == 0:
+            return self.xf.format_key
+        elif self.xf._format_flag:
+            return self.xf.format_key
+        else:
+            return self.parent_style.format_key
+
+    @property
+    def format(self):
+        """ Get the Format() class. """
+        return self.book.format_map[self.format_key]
+
+    def format_str(self):
+        """ Get the associated 'format_str'. """
+        return self.format.format_str
+
+    #
+    # access the XFAligment() class
+    #
+
+    @property
+    def alignment(self):
+        if self.xf.is_style and \
+           self.xf._alignment_flag == 0:
+            return self.xf.alignment
+        elif self.xf._alignment_flag:
+            return self.xf.alignment
+        else:
+            return self.parent_style.alignment
+
+    #
+    # access the XFBorder() class
+    #
+
+    @property
+    def border(self):
+        if self.xf.is_style and \
+           self.xf._border_flag == 0:
+            return self.xf.border
+        elif self.xf._border_flag:
+            return self.xf.border
+        else:
+            return self.parent_style.border
+
+    def bordercolors(self):
+        """ Get border color as dict of rgb-color-tuples. """
+        border = self.border
+        return {
+            'top': self.get_color(border.top_colour_index),
+            'bottom': self.get_color(border.bottom_colour_index),
+            'left': self.get_color(border.left_colour_index),
+            'right': self.get_color(border.right_colour_index),
+            'diag': self.get_color(border.diag_colour_index),
+        }
+
+    def borderstyles(self):
+        """ Get border styles as dict of ints. """
+        border = self.border
+        return {
+            'top': border.top_line_style,
+            'bottom': border.bottom_line_style,
+            'left': border.left_line_style,
+            'right': border.right_line_style,
+            'diag': border.diag_line_style,
+        }
+
+    @property
+    def has_up_diag(self):
+        """ Draw a line across the cell from bottom left to top right. """
+        return bool(self.border.diag_up)
+
+    @property
+    def has_down_diag(self):
+        """ Draw a line across the cell from top left to bottom right. """
+        return bool(self.border.diag_down)
+
+    #
+    # access the XFProtection() class
+    #
+
+    @property
+    def protection(self):
+        if self.xf.is_style and \
+           self.xf._protection_flag == 0:
+            return self.xf.protection
+        elif self.xf._protection_flag:
+            return self.xf.protection
+        else:
+            return self.parent_style.protection
+
+    @property
+    def is_cell_locked(self):
+        return bool(self.protection.cell_locked)
+
+    @property
+    def is_formula_hidden(self):
+        return bool(self.protection.cell_locked)
diff --git a/tablib/packages/xlrd3/xfconst.py b/tablib/packages/xlrd3/xfconst.py
new file mode 100644
index 0000000..24f6533
--- /dev/null
+++ b/tablib/packages/xlrd3/xfconst.py
@@ -0,0 +1,84 @@
+# Author:  mozman <mozman@gmx.at>
+# Purpose: xfconst -- xf constants
+# Created: 05.12.2010
+# Copyright (C) 2010, Manfred Moitzi
+# License: BSD-style licence
+
+# excelfileformat section 5.115.1 pg. 219
+HOR_ALIGN_GENERAL = 0
+HOR_ALIGN_LEFT = 1
+HOR_ALIGN_CENTRED = 2
+HOR_ALIGN_RIGHT = 3
+HOR_ALIGN_FILLED = 4
+HOR_ALIGN_JUSTIFIED = 5
+HOR_ALIGN_CENTRED_ACROSS_SELECTION = 6
+HOR_ALIGN_DISTRIBUTED = 7
+
+# excelfileformat section 5.115.1 pg. 220
+VERT_ALIGN_TOP = 0
+VERT_ALIGN_CENTRED = 1
+VERT_ALIGN_BOTTOM = 2
+VERT_ALIGN_JUSTIFIED = 3
+VERT_ALIGN_DISTRIBUTED = 4
+
+# excelfileformat section 5.115.1 pg. 220
+ORIENTATION_NONE = 0
+ORIENTATION_STACKED = 1
+ORIENTATION_90_COUNTERCLOCKWISE = 2
+ORIENTATION_90_CLOCKWISE = 3
+
+# excelfileformat section 5.115.1 pg. 220
+ROTATION_NONE = 0
+ROTATION_STACKED = 255
+# other values:
+# Value    Description
+# =======  =================================
+# 1-90     1 to 90 degrees counterclockwise
+# 91-180   1 to 90 degrees clockwise
+
+# excelfileformat section 2.5.11  Line Styles for Cell Borders pg. 24
+LS_NOLINE = 0
+
+# solid line
+LS_THIN = 1
+
+# solid line
+LS_MEDIUM = 2
+
+# - - - - - - - - -
+LS_DASHED = 3
+
+# .................
+LS_DOTTED = 4
+
+# solid line
+LS_THICK = 5
+
+# =================
+LS_DOUBLE = 6
+
+# very thin dotted
+LS_HAIR = 7
+
+# - - - - - - - - -
+LS_MEDIUM_DASHED = 8
+
+# - . - . - . - . -
+LS_THIN_DASH_DOTTED = 9
+
+# - . - . - . - . -
+LS_MEDIUM_DASH_DOTTED = 10
+
+# - .. - .. - .. - .. -
+LS_THIN_DASH_DOT_DOTTED = 11
+
+# - .. - .. - .. - .. -
+LS_MEDIUM_DASH_DOT_DOTTED = 12
+
+# \\\ . \\\ . \\\ . \\\ . \\\
+LS_SLANTED_MEDIUM_DASH_DOTTED = 13
+
+
+
+
+
diff --git a/tablib/packages/xlrd3/xldate.py b/tablib/packages/xlrd3/xldate.py
new file mode 100644
index 0000000..634709d
--- /dev/null
+++ b/tablib/packages/xlrd3/xldate.py
@@ -0,0 +1,167 @@
+# No part of the content of this file was derived from the works of David Giffin.
+#
+# Copyright © 2005-2008 Stephen John Machin, Lingfo Pty Ltd
+# This module is part of the xlrd3 package, which is released under a
+# BSD-style licence.
+#
+# Provides function(s) for dealing with Microsoft Excel ™ dates.
+#
+# 2008-10-18 SJM Fix bug in xldate_from_date_tuple (affected some years after 2099)
+#
+# The conversion from days to (year, month, day) starts with
+# an integral "julian day number" aka JDN.
+# FWIW, JDN 0 corresponds to noon on Monday November 24 in Gregorian year -4713.
+# More importantly:
+#    Noon on Gregorian 1900-03-01 (day 61 in the 1900-based system) is JDN 2415080.0
+#    Noon on Gregorian 1904-01-02 (day  1 in the 1904-based system) is JDN 2416482.0
+
+def ifd(x, y):
+    return divmod(x, y)[0]
+
+_JDN_delta = (2415080 - 61, 2416482 - 1)
+assert _JDN_delta[1] - _JDN_delta[0] == 1462
+
+class XLDateError(ValueError): pass
+
+class XLDateNegative(XLDateError): pass
+class XLDateAmbiguous(XLDateError): pass
+class XLDateTooLarge(XLDateError): pass
+class XLDateBadDatemode(XLDateError): pass
+class XLDateBadTuple(XLDateError): pass
+
+_XLDAYS_TOO_LARGE = (2958466, 2958466 - 1462) # This is equivalent to 10000-01-01
+
+# Convert an Excel number (presumed to represent a date, a datetime or a time) into
+# a tuple suitable for feeding to datetime or mx.DateTime constructors.
+# @param xldate The Excel number
+# @param datemode 0: 1900-based, 1: 1904-based.
+# <br>WARNING: when using this function to
+# interpret the contents of a workbook, you should pass in the Book.datemode
+# attribute of that workbook. Whether
+# the workbook has ever been anywhere near a Macintosh is irrelevant.
+# @return Gregorian (year, month, day, hour, minute, nearest_second).
+# <br>Special case: if 0.0 <= xldate < 1.0, it is assumed to represent a time;
+# (0, 0, 0, hour, minute, second) will be returned.
+# <br>Note: 1904-01-01 is not regarded as a valid date in the datemode 1 system; its "serial number"
+# is zero.
+# @throws XLDateNegative xldate < 0.00
+# @throws XLDateAmbiguous The 1900 leap-year problem (datemode == 0 and 1.0 <= xldate < 61.0)
+# @throws XLDateTooLarge Gregorian year 10000 or later
+# @throws XLDateBadDatemode datemode arg is neither 0 nor 1
+# @throws XLDateError Covers the 4 specific errors
+
+def xldate_as_tuple(xldate, datemode):
+    if datemode not in (0, 1):
+        raise XLDateBadDatemode(datemode)
+    if xldate == 0.00:
+        return (0, 0, 0, 0, 0, 0)
+    if xldate < 0.00:
+        raise XLDateNegative(xldate)
+    xldays = int(xldate)
+    frac = xldate - xldays
+    seconds = int(round(frac * 86400.0))
+    assert 0 <= seconds <= 86400
+    if seconds == 86400:
+        hour = minute = second = 0
+        xldays += 1
+    else:
+        # second = seconds % 60; minutes = seconds // 60
+        minutes, second = divmod(seconds, 60)
+        # minute = minutes % 60; hour    = minutes // 60
+        hour, minute = divmod(minutes, 60)
+    if xldays >= _XLDAYS_TOO_LARGE[datemode]:
+        raise XLDateTooLarge(xldate)
+
+    if xldays == 0:
+        return (0, 0, 0, hour, minute, second)
+
+    if xldays < 61 and datemode == 0:
+        raise XLDateAmbiguous(xldate)
+
+    jdn = xldays + _JDN_delta[datemode]
+    yreg = (ifd(ifd(jdn * 4 + 274277, 146097) * 3, 4) + jdn + 1363) * 4 + 3
+    mp = ifd(yreg % 1461, 4) * 535 + 333
+    d = ifd(mp % 16384, 535) + 1
+    # mp /= 16384
+    mp >>= 14
+    if mp >= 10:
+        return (ifd(yreg, 1461) - 4715, mp - 9, d, hour, minute, second)
+    else:
+        return (ifd(yreg, 1461) - 4716, mp + 3, d, hour, minute, second)
+
+# === conversions from date/time to xl numbers
+
+def _leap(y):
+    if y % 4: return 0
+    if y % 100: return 1
+    if y % 400: return 0
+    return 1
+
+_days_in_month = (None, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31)
+
+# Convert a date tuple (year, month, day) to an Excel date.
+# @param year Gregorian year.
+# @param month 1 <= month <= 12
+# @param day 1 <= day <= last day of that (year, month)
+# @param datemode 0: 1900-based, 1: 1904-based.
+# @throws XLDateAmbiguous The 1900 leap-year problem (datemode == 0 and 1.0 <= xldate < 61.0)
+# @throws XLDateBadDatemode datemode arg is neither 0 nor 1
+# @throws XLDateBadTuple (year, month, day) is too early/late or has invalid component(s)
+# @throws XLDateError Covers the specific errors
+
+def xldate_from_date_tuple(datetuple, datemode):
+
+    (year, month, day) = datetuple
+    if datemode not in (0, 1):
+        raise XLDateBadDatemode(datemode)
+
+    if year == 0 and month == 0 and day == 0:
+        return 0.00
+
+    if not (1900 <= year <= 9999):
+        raise XLDateBadTuple("Invalid year: %r" % ((year, month, day),))
+    if not (1 <= month <= 12):
+        raise XLDateBadTuple("Invalid month: %r" % ((year, month, day),))
+    if  day < 1 \
+    or (day > _days_in_month[month] and not(day == 29 and month == 2 and _leap(year))):
+        raise XLDateBadTuple("Invalid day: %r" % ((year, month, day),))
+
+    Yp = year + 4716
+    M = month
+    if M <= 2:
+        Yp = Yp - 1
+        Mp = M + 9
+    else:
+        Mp = M - 3
+    jdn = ifd(1461 * Yp, 4) + ifd(979 * Mp + 16, 32) + \
+        day - 1364 - ifd(ifd(Yp + 184, 100) * 3, 4)
+    xldays = jdn - _JDN_delta[datemode]
+    if xldays <= 0:
+        raise XLDateBadTuple("Invalid (year, month, day): %r" % ((year, month, day),))
+    if xldays < 61 and datemode == 0:
+        raise XLDateAmbiguous("Before 1900-03-01: %r" % ((year, month, day),))
+    return float(xldays)
+
+# Convert a time tuple (hour, minute, second) to an Excel "date" value (fraction of a day).
+# @param hour 0 <= hour < 24
+# @param minute 0 <= minute < 60
+# @param second 0 <= second < 60
+# @throws XLDateBadTuple Out-of-range hour, minute, or second
+
+def xldate_from_time_tuple(timetuple):
+    (hour, minute, second) = timetuple
+    if 0 <= hour < 24 and 0 <= minute < 60 and 0 <= second < 60:
+        return ((second / 60.0 + minute) / 60.0 + hour) / 24.0
+    raise XLDateBadTuple("Invalid (hour, minute, second): %r" % ((hour, minute, second),))
+
+# Convert a datetime tuple (year, month, day, hour, minute, second) to an Excel date value.
+# For more details, refer to other xldate_from_*_tuple functions.
+# @param datetime_tuple (year, month, day, hour, minute, second)
+# @param datemode 0: 1900-based, 1: 1904-based.
+
+def xldate_from_datetime_tuple(datetime_tuple, datemode):
+    return (
+        xldate_from_date_tuple(datetime_tuple[:3], datemode)
+        +
+        xldate_from_time_tuple(datetime_tuple[3:])
+        )
author	Kenneth Reitz <me@kennethreitz.com>	2012-11-15 18:56:50 -0800
committer	Kenneth Reitz <me@kennethreitz.com>	2012-11-15 18:56:50 -0800
commit	9f38efe4133f6f4c4a2e58b5867f3f7883d119c8 (patch)
tree	9dea315df1aff6c934114b6a31a676d05f3c9dc3 /tablib
parent	5d98239a7e988a1a16261c6cb7073d618b92cfc7 (diff)
parent	15435047c668aa8e1fb5ffc1a8db30e5b944d5fd (diff)
download	tablib-9f38efe4133f6f4c4a2e58b5867f3f7883d119c8.tar.gz