[Python-checkins] r61582 - python/trunk/Lib/zipfile.py
gregory.p.smith
python-checkins at python.org
Wed Mar 19 02:46:10 CET 2008
Author: gregory.p.smith
Date: Wed Mar 19 02:46:10 2008
New Revision: 61582
Modified:
python/trunk/Lib/zipfile.py
Log:
Use zlib's crc32 routine instead of binascii when available. zlib's is faster
when compiled properly optimized and about the same speed otherwise.
Modified: python/trunk/Lib/zipfile.py
==============================================================================
--- python/trunk/Lib/zipfile.py (original)
+++ python/trunk/Lib/zipfile.py Wed Mar 19 02:46:10 2008
@@ -6,8 +6,10 @@
try:
import zlib # We may need its compression method
+ crc32 = zlib.crc32
except ImportError:
zlib = None
+ crc32 = binascii.crc32
__all__ = ["BadZipfile", "error", "ZIP_STORED", "ZIP_DEFLATED", "is_zipfile",
"ZipInfo", "ZipFile", "PyZipFile", "LargeZipFile" ]
@@ -940,7 +942,7 @@
if not buf:
break
file_size = file_size + len(buf)
- CRC = binascii.crc32(buf, CRC)
+ CRC = crc32(buf, CRC)
if cmpr:
buf = cmpr.compress(buf)
compress_size = compress_size + len(buf)
@@ -983,7 +985,7 @@
zinfo.header_offset = self.fp.tell() # Start of header bytes
self._writecheck(zinfo)
self._didModify = True
- zinfo.CRC = binascii.crc32(bytes) # CRC-32 checksum
+ zinfo.CRC = crc32(bytes) # CRC-32 checksum
if zinfo.compress_type == ZIP_DEFLATED:
co = zlib.compressobj(zlib.Z_DEFAULT_COMPRESSION,
zlib.DEFLATED, -15)
@@ -1041,7 +1043,7 @@
if extra:
# Append a ZIP64 field to the extra's
extra_data = struct.pack(
- '<hh' + 'q'*len(extra),
+ '<HH' + 'Q'*len(extra),
1, 8*len(extra), *extra) + extra_data
extract_version = max(45, zinfo.extract_version)
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