[Python-checkins] r61591 - python/trunk/Lib/zipfile.py
gregory.p.smith
python-checkins at python.org
Wed Mar 19 04:14:42 CET 2008
Author: gregory.p.smith
Date: Wed Mar 19 04:14:41 2008
New Revision: 61591
Modified:
python/trunk/Lib/zipfile.py
Log:
Fix the struct module DeprecationWarnings that zipfile was triggering by
removing all use of signed struct values.
test_zipfile and test_zipfile64 pass. no more warnings.
Modified: python/trunk/Lib/zipfile.py
==============================================================================
--- python/trunk/Lib/zipfile.py (original)
+++ python/trunk/Lib/zipfile.py Wed Mar 19 04:14:41 2008
@@ -36,13 +36,13 @@
# Here are some struct module formats for reading headers
structEndArchive = "<4s4H2LH" # 9 items, end of archive, 22 bytes
stringEndArchive = "PK\005\006" # magic number for end of archive record
-structCentralDir = "<4s4B4HlLL5HLL"# 19 items, central directory, 46 bytes
+structCentralDir = "<4s4B4HLLL5HLL"# 19 items, central directory, 46 bytes
stringCentralDir = "PK\001\002" # magic number for central directory
-structFileHeader = "<4s2B4HlLL2H" # 12 items, file header record, 30 bytes
+structFileHeader = "<4s2B4HLLL2H" # 12 items, file header record, 30 bytes
stringFileHeader = "PK\003\004" # magic number for file header
-structEndArchive64Locator = "<4slql" # 4 items, locate Zip64 header, 20 bytes
+structEndArchive64Locator = "<4sLQL" # 4 items, locate Zip64 header, 20 bytes
stringEndArchive64Locator = "PK\x06\x07" # magic token for locator header
-structEndArchive64 = "<4sqhhllqqqq" # 10 items, end of archive (Zip64), 56 bytes
+structEndArchive64 = "<4sQHHLLQQQQ" # 10 items, end of archive (Zip64), 56 bytes
stringEndArchive64 = "PK\x06\x06" # magic token for Zip64 header
@@ -140,7 +140,7 @@
endrec = list(endrec)
endrec.append("") # Append the archive comment
endrec.append(filesize - 22) # Append the record start offset
- if endrec[-4] == -1 or endrec[-4] == 0xffffffff:
+ if endrec[-4] == 0xffffffff:
return _EndRecData64(fpin, -22, endrec)
return endrec
# Search the last END_BLOCK bytes of the file for the record signature.
@@ -160,7 +160,7 @@
# Append the archive comment and start offset
endrec.append(comment)
endrec.append(filesize - END_BLOCK + start)
- if endrec[-4] == -1 or endrec[-4] == 0xffffffff:
+ if endrec[-4] == 0xffffffff:
return _EndRecData64(fpin, - END_BLOCK + start, endrec)
return endrec
return # Error, return None
@@ -247,7 +247,7 @@
if file_size > ZIP64_LIMIT or compress_size > ZIP64_LIMIT:
# File is larger than what fits into a 4 byte integer,
# fall back to the ZIP64 extension
- fmt = '<hhqq'
+ fmt = '<HHQQ'
extra = extra + struct.pack(fmt,
1, struct.calcsize(fmt)-4, file_size, compress_size)
file_size = 0xffffffff # -1
@@ -267,14 +267,14 @@
extra = self.extra
unpack = struct.unpack
while extra:
- tp, ln = unpack('<hh', extra[:4])
+ tp, ln = unpack('<HH', extra[:4])
if tp == 1:
if ln >= 24:
- counts = unpack('<qqq', extra[4:28])
+ counts = unpack('<QQQ', extra[4:28])
elif ln == 16:
- counts = unpack('<qq', extra[4:20])
+ counts = unpack('<QQ', extra[4:20])
elif ln == 8:
- counts = unpack('<q', extra[4:12])
+ counts = unpack('<Q', extra[4:12])
elif ln == 0:
counts = ()
else:
@@ -283,7 +283,8 @@
idx = 0
# ZIP64 extension (large files and/or large archives)
- if self.file_size == -1 or self.file_size == 0xFFFFFFFFL:
+ # XXX Is this correct? won't this exclude 2**32-1 byte files?
+ if self.file_size in (0xffffffffffffffffL, 0xffffffffL):
self.file_size = counts[idx]
idx += 1
@@ -942,7 +943,7 @@
if not buf:
break
file_size = file_size + len(buf)
- CRC = crc32(buf, CRC)
+ CRC = crc32(buf, CRC) & 0xffffffff
if cmpr:
buf = cmpr.compress(buf)
compress_size = compress_size + len(buf)
@@ -960,7 +961,7 @@
# Seek backwards and write CRC and file sizes
position = self.fp.tell() # Preserve current position in file
self.fp.seek(zinfo.header_offset + 14, 0)
- self.fp.write(struct.pack("<lLL", zinfo.CRC, zinfo.compress_size,
+ self.fp.write(struct.pack("<LLL", zinfo.CRC, zinfo.compress_size,
zinfo.file_size))
self.fp.seek(position, 0)
self.filelist.append(zinfo)
@@ -985,7 +986,7 @@
zinfo.header_offset = self.fp.tell() # Start of header bytes
self._writecheck(zinfo)
self._didModify = True
- zinfo.CRC = crc32(bytes) # CRC-32 checksum
+ zinfo.CRC = crc32(bytes) & 0xffffffff # CRC-32 checksum
if zinfo.compress_type == ZIP_DEFLATED:
co = zlib.compressobj(zlib.Z_DEFAULT_COMPRESSION,
zlib.DEFLATED, -15)
@@ -1035,7 +1036,7 @@
if zinfo.header_offset > ZIP64_LIMIT:
extra.append(zinfo.header_offset)
- header_offset = -1 # struct "l" format: 32 one bits
+ header_offset = 0xffffffffL # -1 32 bit
else:
header_offset = zinfo.header_offset
@@ -1052,14 +1053,25 @@
extract_version = zinfo.extract_version
create_version = zinfo.create_version
- centdir = struct.pack(structCentralDir,
- stringCentralDir, create_version,
- zinfo.create_system, extract_version, zinfo.reserved,
- zinfo.flag_bits, zinfo.compress_type, dostime, dosdate,
- zinfo.CRC, compress_size, file_size,
- len(zinfo.filename), len(extra_data), len(zinfo.comment),
- 0, zinfo.internal_attr, zinfo.external_attr,
- header_offset)
+ try:
+ centdir = struct.pack(structCentralDir,
+ stringCentralDir, create_version,
+ zinfo.create_system, extract_version, zinfo.reserved,
+ zinfo.flag_bits, zinfo.compress_type, dostime, dosdate,
+ zinfo.CRC, compress_size, file_size,
+ len(zinfo.filename), len(extra_data), len(zinfo.comment),
+ 0, zinfo.internal_attr, zinfo.external_attr,
+ header_offset)
+ except DeprecationWarning:
+ print >>sys.stderr, (structCentralDir,
+ stringCentralDir, create_version,
+ zinfo.create_system, extract_version, zinfo.reserved,
+ zinfo.flag_bits, zinfo.compress_type, dostime, dosdate,
+ zinfo.CRC, compress_size, file_size,
+ len(zinfo.filename), len(extra_data), len(zinfo.comment),
+ 0, zinfo.internal_attr, zinfo.external_attr,
+ header_offset)
+ raise
self.fp.write(centdir)
self.fp.write(zinfo.filename)
self.fp.write(extra_data)
@@ -1079,10 +1091,8 @@
stringEndArchive64Locator, 0, pos2, 1)
self.fp.write(zip64locrec)
- # XXX Why is `pos3` computed next? It's never referenced.
- pos3 = self.fp.tell()
endrec = struct.pack(structEndArchive, stringEndArchive,
- 0, 0, count, count, pos2 - pos1, -1, 0)
+ 0, 0, count, count, pos2 - pos1, 0xffffffffL, 0)
self.fp.write(endrec)
else:
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