Merged revisions 61820-61823 via svnmerge from
svn+ssh://pythondev@svn.python.org/python/trunk
........
r61820 | gregory.p.smith | 2008-03-23 23:14:38 +0100 (Sun, 23 Mar 2008) | 2 lines
replace calls to get the initial values with the raw constants.
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r61821 | gregory.p.smith | 2008-03-24 00:43:02 +0100 (Mon, 24 Mar 2008) | 2 lines
A bugfix for r61813, it would fail if the data size was >=2**32.
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r61822 | gregory.p.smith | 2008-03-24 00:45:12 +0100 (Mon, 24 Mar 2008) | 2 lines
prevent a warning from the struct module when data size >= 2**32.
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r61823 | gregory.p.smith | 2008-03-24 01:08:01 +0100 (Mon, 24 Mar 2008) | 4 lines
Have the binascii module use zlib's optimized crc32() function when available
to reduce our code size (1k data table and tiny bit of code). It falls back
to its own without zlib.
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diff --git a/Lib/gzip.py b/Lib/gzip.py
index e82cc61..45fae9f 100644
--- a/Lib/gzip.py
+++ b/Lib/gzip.py
@@ -17,7 +17,6 @@
def U32(i):
"""Return i as an unsigned integer, assuming it fits in 32 bits.
-
If it's >= 2GB when viewed as a 32-bit unsigned int, return a long.
"""
if i < 0:
@@ -320,7 +319,7 @@
if crc32 != self.crc:
raise IOError("CRC check failed %s != %s" % (hex(crc32),
hex(self.crc)))
- elif isize != self.size:
+ elif isize != (self.size & 0xffffffff):
raise IOError("Incorrect length of data produced")
def close(self):
@@ -328,7 +327,7 @@
self.fileobj.write(self.compress.flush())
write32u(self.fileobj, self.crc)
# self.size may exceed 2GB, or even 4GB
- write32u(self.fileobj, self.size)
+ write32u(self.fileobj, self.size & 0xffffffff)
self.fileobj = None
elif self.mode == READ:
self.fileobj = None
diff --git a/Modules/binascii.c b/Modules/binascii.c
index e09255c..034dc01 100644
--- a/Modules/binascii.c
+++ b/Modules/binascii.c
@@ -56,6 +56,9 @@
#define PY_SSIZE_T_CLEAN
#include "Python.h"
+#ifdef USE_ZLIB_CRC32
+#include "zlib.h"
+#endif
static PyObject *Error;
static PyObject *Incomplete;
@@ -776,6 +779,20 @@
PyDoc_STRVAR(doc_crc32,
"(data, oldcrc = 0) -> newcrc. Compute CRC-32 incrementally");
+#ifdef USE_ZLIB_CRC32
+/* This was taken from zlibmodule.c PyZlib_crc32 (but is PY_SSIZE_T_CLEAN) */
+static PyObject *
+binascii_crc32(PyObject *self, PyObject *args)
+{
+ uLong crc32val = 0; /* crc32(0L, Z_NULL, 0) */
+ Byte *buf;
+ int len;
+ if (!PyArg_ParseTuple(args, "s#|I:crc32", &buf, &len, &crc32val))
+ return NULL;
+ crc32val = crc32(crc32val, buf, len);
+ return PyLong_FromUnsignedLong(crc32val & 0xffffffffU);
+}
+#else /* USE_ZLIB_CRC32 */
/* Crc - 32 BIT ANSI X3.66 CRC checksum files
Also known as: ISO 3307
**********************************************************************|
@@ -914,6 +931,7 @@
result = (crc ^ 0xFFFFFFFF);
return PyLong_FromUnsignedLong(result & 0xffffffff);
}
+#endif /* USE_ZLIB_CRC32 */
static PyObject *
diff --git a/Modules/zlibmodule.c b/Modules/zlibmodule.c
index 3426ccf..cecb9cf 100644
--- a/Modules/zlibmodule.c
+++ b/Modules/zlibmodule.c
@@ -915,7 +915,7 @@
static PyObject *
PyZlib_adler32(PyObject *self, PyObject *args)
{
- unsigned int adler32val = adler32(0L, Z_NULL, 0);
+ uLong adler32val = 1; /* adler32(0L, Z_NULL, 0) */
Byte *buf;
int len;
@@ -934,7 +934,7 @@
static PyObject *
PyZlib_crc32(PyObject *self, PyObject *args)
{
- unsigned int crc32val = crc32(0L, Z_NULL, 0);
+ uLong crc32val = 0; /* crc32(0L, Z_NULL, 0) */
Byte *buf;
int len;
if (!PyArg_ParseTuple(args, "s#|I:crc32", &buf, &len, &crc32val))
diff --git a/setup.py b/setup.py
index 2365a0b..be34cd1 100644
--- a/setup.py
+++ b/setup.py
@@ -472,9 +472,6 @@
# select(2); not on ancient System V
exts.append( Extension('select', ['selectmodule.c']) )
- # Helper module for various ascii-encoders
- exts.append( Extension('binascii', ['binascii.c']) )
-
# Fred Drake's interface to the Python parser
exts.append( Extension('parser', ['parsermodule.c']) )
@@ -1005,6 +1002,7 @@
# You can upgrade zlib to version 1.1.4 yourself by going to
# http://www.gzip.org/zlib/
zlib_inc = find_file('zlib.h', [], inc_dirs)
+ have_zlib = False
if zlib_inc is not None:
zlib_h = zlib_inc[0] + '/zlib.h'
version = '"0.0.0"'
@@ -1026,6 +1024,7 @@
exts.append( Extension('zlib', ['zlibmodule.c'],
libraries = ['z'],
extra_link_args = zlib_extra_link_args))
+ have_zlib = True
else:
missing.append('zlib')
else:
@@ -1033,6 +1032,21 @@
else:
missing.append('zlib')
+ # Helper module for various ascii-encoders. Uses zlib for an optimized
+ # crc32 if we have it. Otherwise binascii uses its own.
+ if have_zlib:
+ extra_compile_args = ['-DUSE_ZLIB_CRC32']
+ libraries = ['z']
+ extra_link_args = zlib_extra_link_args
+ else:
+ extra_compile_args = []
+ libraries = []
+ extra_link_args = []
+ exts.append( Extension('binascii', ['binascii.c'],
+ extra_compile_args = extra_compile_args,
+ libraries = libraries,
+ extra_link_args = extra_link_args) )
+
# Gustavo Niemeyer's bz2 module.
if (self.compiler.find_library_file(lib_dirs, 'bz2')):
if sys.platform == "darwin":