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Copyright 2001-2020 Free Software Foundation, Inc.
Copying and distribution of this file, with or without modification,
are permitted in any medium without royalty provided the copyright
notice and this notice are preserved.
This file gives an overview of the directories and the main files of
the groff source distribution.
1) The top directory.
BUG-REPORT A template for bug-reports.
ChangeLog Log of the changes in the different groff versions.
COPYING The GNU General Public License (GPL).
FDL The Free Documentation License (FDL).
INSTALL Information on compiling and installing groff.
INSTALL.gen Generic information on configuration and compiling.
LICENSES Licensing information.
MANIFEST The file you are reading.
MORE.STUFF Useful stuff in other packages.
NEWS Recent user-visible changes in groff.
PROBLEMS Tips to handle known critical situations.
PROJECTS Long-term additions to groff.
README Availability and contact information for groff.
README.MinGW Build information for MinGW.
TODO Things planned for future groff versions.
All other files in the top directory are related to the configuration,
compilation, and install processes.
2) The directory structure
./arch Data that is special for different architectures.
djgpp Data special for the 32-bit DOS compiler djgpp.
misc Data needed for various platforms.
./contrib Part of groff, but maintained by other people.
chem A preprocessor (for pic) to produce chemical structure
diagrams.
eqn2graph Convert equations created with EQN into different
graphical formats.
gdiffmk An improved implementation of the diffmk command to mark
differences between groff/nroff/troff files.
glilypond A preprocessor that handles `lilypond' parts in a `roff'
file.
gperl A preprocessor that handles `perl' parts in a `roff'
file.
gpinyin A preprocessor providing simpler Pinyin input.
grap2graph Convert grap diagraps into different graphical formats.
hdtbl A sophisticated table macro package.
mm The groff mm macro package.
mom The groff mom macro package.
pdfmark A package to add PDF marks to groff documents, together
with a shell script (pdfroff) for easy creation of PDF
documents.
pic2graph Convert PIC diagrams into different graphical formats.
./doc Manuals and tutorials to groff aspects.
./font Device information and fonts.
devX100 100dpi device for X Window System.
devX100-12 100dpi device with narrower font (for 12pt base font).
devX75 75dpi device for X Window System.
devX75-12 75dpi device with narrower font (for 12pt base font).
devascii Text device for ASCII output.
devcp1047 EBCDIC device.
devdvi TeX DVI device.
devhtml HTML device.
devlatin1 Text device for latin-1 (ISO 8859-1) output.
devlbp Device for Canon CaPSL laser printers.
devlj4 Device for HP LaserJet 4/PCL 5 and compatible printers.
devps PostScript device.
devpdf PDF device.
devutf8 Text device for Unicode output.
util Utility programs.
./m4 M4 macro files used creating the configure script.
./man Some groff manual pages of more general character.
./src Everything written in programming languages.
./src/devices The postprocessors.
grodvi TeX DVI output.
grohtml HTML output.
grolbp Canon printers.
grolj4 HP Laserjet 4, PCL 5, and compatible printers.
grops PostScript output.
gropdf PDF output.
grotty Text output.
xditview A groff (pre)viewer for the X Window system.
./src/include The *.h C/C++ include files.
./src/libs C++ code common to several parts of the groff sources.
gnulib Auxiliary functions copied from the `gnulib' repository.
libbib Library of bibliographic functions.
libdriver Parser for intermediate output and postprocessor code.
libgroff Library for general support functions used everywhere.
libxutil Utility functions for xditview and xtotroff.
./src/preproc Preprocessors.
eqn Mathematical formulae.
grn Gremlin pictures.
html The preprocessor part of grohtml.
pic Diagram drawer.
preconv Input encoding conversion.
refer Bibliographic references.
soelim File inclusion using tmac path.
tbl Tables.
./src/roff Front-end programs.
groff Wrapper around troff. This is the main user program.
nroff Emulate classical nroff text formatter.
troff Main roff formatter program.
./src/utils Utility programs around groff.
addftinfo Add font metrics to troff fonts for use with groff.
afmtodit Create font description files for the PostScript device.
grog Guess groff command-line options required by a document.
hpftodit Create font description files for the LJ4 device.
indxbib Make inverted index for bibliographic databases.
lkbib Search bibliographic databases.
lookbib Interactively search bibliographic databases.
pfbtops Translate a PostScript font in PFB format to PFA.
tfmtodit Create font description files for TeX DVI device.
xtotroff Create font description files for xditview.
./tmac Macro files.
3) Documentation
The groff documentation is scattered upon several places.
- The main directory contains documents related to the groff source.
The README file contains the information needed to get the groff
package, report bugs, and contact the developers.
- The man-page of each program (section 1) is kept in the source
directory of the program.
- The man-pages for the other sections are found in `src/man'.
- Documentation in other formats are located in the `doc' directory,
including the groff info file, tutorials, and manuals.
Man-pages have source files ending in `.man'. Running `make' processes
the files and uses `.n' as the new file extension. In both cases it is
difficult to quickly decide into which section the man-page shall go.
Here is a shell command (to be called from the top directory of the
groff source tree) that finds all man-pages and writes the section
number after each file name:
find -type f \
| grep '[.]man$' \
| sort \
| xargs grep -e '^[.]TH ' \
| sed -e 's/^\(.\+\): *\.TH.*@MAN\(.*\)EXT@.*$/\1 \2/'
4) The roff parser
The parsing of the roff language is done by troff. The input is
converted to tokens in `src/roff/troff/input.cpp' and transformed into
`nodes' by `src/roff/troff/env.cpp' and `src/roff/troff/node.cpp'. From
these, the intermediate output is generated (also in `node.cpp').
5) Postprocessing
The parser for the intermediate output and the postprocessing is in
`src/libs/libdriver/input.cpp'. This is used by all postprocessors.
##### Editor settings
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