Merged revisions 59696-59702 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/trunk

........
  r59696 | amaury.forgeotdarc | 2008-01-04 03:04:15 +0100 (Fri, 04 Jan 2008) | 11 lines

  Partial port of r59682 from py3k.

  On Windows, when import fails to load a dll module, the message says
  "error code 193" instead of a more informative text.

  It turns out that FormatMessage needs additional parameters for some error codes.
  For example: 193 means "%1 is not a valid Win32 application".
  Since it is impossible to know which parameter to pass, we use
  FORMAT_MESSAGE_IGNORE_INSERTS to get the raw message, which is still better
  than the number.
........
  r59698 | andrew.kuchling | 2008-01-04 03:26:00 +0100 (Fri, 04 Jan 2008) | 1 line

  Typo fix
........
  r59699 | andrew.kuchling | 2008-01-04 03:31:40 +0100 (Fri, 04 Jan 2008) | 1 line

  Add math items; other edits
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  r59700 | christian.heimes | 2008-01-04 03:46:19 +0100 (Fri, 04 Jan 2008) | 1 line

  Fixed refleak tests for _struct changes
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  r59701 | christian.heimes | 2008-01-04 03:54:42 +0100 (Fri, 04 Jan 2008) | 1 line

  Added _struct._clearcache() for regression tests
........

Lib/struct.py

@@ -1,109 +1,2 @@
-"""
-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__ = '3.0'
-
-
-from _struct import Struct as _Struct, error
-
-class Struct(_Struct):
-    def __init__(self, fmt):
-        if isinstance(fmt, str):
-            fmt = bytes(fmt, 'ascii')
-        elif isinstance(fmt, buffer):
-            fmt = bytes(fmt)
-        _Struct.__init__(self, fmt)
-
-_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 bytes(o.pack(*args))
-
-def pack_into(fmt, buf, offset, *args):
-    """
-    Pack the values v1, v2, ... according to fmt, write
-    the packed bytes into the writable buffer buf starting at offset.
-    See struct.__doc__ for more on format strings.
-    """
-    try:
-        o = _cache[fmt]
-    except KeyError:
-        o = _compile(fmt)
-    o.pack_into(buf, offset, *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)
-
-def unpack_from(fmt, buf, offset=0):
-    """
-    Unpack the buffer, containing packed C structure data, according to
-    fmt starting at offset. Requires len(buffer[offset:]) >= calcsize(fmt).
-    See struct.__doc__ for more on format strings.
-    """
-    try:
-        o = _cache[fmt]
-    except KeyError:
-        o = _compile(fmt)
-    return o.unpack_from(buf, offset)
+from _struct import *
+from _struct import _clearcache