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[Patch #1350573] zlib.crc32 doesn't handle 0xffffffff seed. Add tests and bugfix. Bug reported by John Schmidt; bugfix by Danny Yoo.

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This commit is contained in:
Andrew M. Kuchling
2005-11-22 15:39:05 +00:00
parent c6f6cb74af
commit 4e2a4ff607
2 changed files with 4 additions and 2 deletions
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2
Lib/test/test_zlib.py
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@@ -24,6 +24,7 @@ class ChecksumTestCase(unittest.TestCase):
# checksum test cases
def test_crc32start(self):
self.assertEqual(zlib.crc32(""), zlib.crc32("", 0))
self.assert_(zlib.crc32("abc", 0xffffffff))
def test_crc32empty(self):
self.assertEqual(zlib.crc32("", 0), 0)
@@ -32,6 +33,7 @@ class ChecksumTestCase(unittest.TestCase):
def test_adler32start(self):
self.assertEqual(zlib.adler32(""), zlib.adler32("", 1))
self.assert_(zlib.adler32("abc", 0xffffffff))
def test_adler32empty(self):
self.assertEqual(zlib.adler32("", 0), 0)

4
Modules/zlibmodule.c
View File

@@ -778,7 +778,7 @@ PyZlib_adler32(PyObject *self, PyObject *args)
Byte *buf;
int len;
if (!PyArg_ParseTuple(args, "s#|l:adler32", &buf, &len, &adler32val))
if (!PyArg_ParseTuple(args, "s#|k:adler32", &buf, &len, &adler32val))
return NULL;
adler32val = adler32(adler32val, buf, len);
return PyInt_FromLong(adler32val);
@@ -796,7 +796,7 @@ PyZlib_crc32(PyObject *self, PyObject *args)
uLong crc32val = crc32(0L, Z_NULL, 0);
Byte *buf;
int len;
if (!PyArg_ParseTuple(args, "s#|l:crc32", &buf, &len, &crc32val))
if (!PyArg_ParseTuple(args, "s#|k:crc32", &buf, &len, &crc32val))
return NULL;
crc32val = crc32(crc32val, buf, len);
return PyInt_FromLong(crc32val);