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author | Bob Ippolito <bob@redivi.com> | 2006-05-23 19:09:51 +0000 |
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committer | Bob Ippolito <bob@redivi.com> | 2006-05-23 19:09:51 +0000 |
commit | 0a3c982a8f4d9000c6a17744f754abd790a046ad (patch) | |
tree | d43e516bdeea84dcd9b8aee0062031e38efda86b /Lib/struct.py | |
parent | 907bd0ecd0dc273e719802794ca1f34bc239ae9a (diff) | |
download | cpython-0a3c982a8f4d9000c6a17744f754abd790a046ad.tar.gz |
revert #1493701
Diffstat (limited to 'Lib/struct.py')
-rw-r--r-- | Lib/struct.py | 76 |
1 files changed, 0 insertions, 76 deletions
diff --git a/Lib/struct.py b/Lib/struct.py deleted file mode 100644 index aa7af71b7a..0000000000 --- a/Lib/struct.py +++ /dev/null @@ -1,76 +0,0 @@ -""" -Functions to convert between Python values and C structs. -Python strings are used to hold the data representing the C struct -and also as format strings to describe the layout of data in the C struct. - -The optional first format char indicates byte order, size and alignment: - @: native order, size & alignment (default) - =: native order, std. size & alignment - <: little-endian, std. size & alignment - >: big-endian, std. size & alignment - !: same as > - -The remaining chars indicate types of args and must match exactly; -these can be preceded by a decimal repeat count: - x: pad byte (no data); c:char; b:signed byte; B:unsigned byte; - h:short; H:unsigned short; i:int; I:unsigned int; - l:long; L:unsigned long; f:float; d:double. -Special cases (preceding decimal count indicates length): - s:string (array of char); p: pascal string (with count byte). -Special case (only available in native format): - P:an integer type that is wide enough to hold a pointer. -Special case (not in native mode unless 'long long' in platform C): - q:long long; Q:unsigned long long -Whitespace between formats is ignored. - -The variable struct.error is an exception raised on errors. -""" -__version__ = '0.1' - -from _struct import Struct, error - -_MAXCACHE = 100 -_cache = {} - -def _compile(fmt): - # Internal: compile struct pattern - if len(_cache) >= _MAXCACHE: - _cache.clear() - s = Struct(fmt) - _cache[fmt] = s - return s - -def calcsize(fmt): - """ - Return size of C struct described by format string fmt. - See struct.__doc__ for more on format strings. - """ - try: - o = _cache[fmt] - except KeyError: - o = _compile(fmt) - return o.size - -def pack(fmt, *args): - """ - Return string containing values v1, v2, ... packed according to fmt. - See struct.__doc__ for more on format strings. - """ - try: - o = _cache[fmt] - except KeyError: - o = _compile(fmt) - return o.pack(*args) - -def unpack(fmt, s): - """ - Unpack the string, containing packed C structure data, according - to fmt. Requires len(string)==calcsize(fmt). - See struct.__doc__ for more on format strings. - """ - try: - o = _cache[fmt] - except KeyError: - o = _compile(fmt) - return o.unpack(s) - |