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Without this, if inflate() returned Z_BUF_ERROR asking for more output
space, we would report the error; now, we increase the buffer size and
try again, just as for Z_OK.
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is not an empty string, this means that you have arrived at the
end of the stream of compressed data, and the contents of .unused_data are
whatever follows the compressed stream.
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the end of loop was incorrect, and failed when the flushmode != Z_FINISH.
Logic cleaned up and commented.
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decompressor object. This required adding a flag to the struct which is
true if initialisation was completed; on object destruction, deflateEnd()
is only called if the flag is true.
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more severe ones.
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patch from Grzegorz Makarewicz & Rafal Smotrzyk.
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successfully)
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checkin)
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NOTE: There is still a bug of some sort in the behavior of zlib. In
at least one case, inflate returns Z_OK (which is typically
interpreted to mean that more output space is needed) when it has
finished inflating a buffer. This has been reported as a bug to the
zlib maintainers; we may need to change the Python interface.
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string we wanted to resize is set to NULL. Don't Py_DECREF() those
variables! (5 places)
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on BeOS or Windows.
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after a return).
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(1) Use PyErr_NewException("module.class", NULL, NULL) to create the
exception object.
(2) Remove all calls to Py_FatalError(); instead, return or
ignore the errors -- the import code now checks PyErr_Occurred()
after calling a module's init function, so it's no longer a
fatal error for the initialization to fail.
Also did some small cleanups, e.g. removed unnecessary test for
"already initialized" from initfpectl(), and unified
initposix()/initnt().
I haven't checked this very thoroughly, so while the changes are
pretty trivial -- beware of untested code!
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1. Fix bug in (de)compression objects. The final string resize used
zst.total_out to determine the length of the string, but the
(de)compression object will output data a little bit at a time, which
means total_out is not the string size. Fix: save original value of
total_out at the start of the call.
2. Be sure to Py_DECREF the result value if you exit with an
exception.
3. Use PyInt_FromLong instead of Py_BuildValue
4. include more constants from the zlib header file
5. Use PyErr_Format instead of using a local buffer and sprintf.
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-- initialize length to DEFAULTALLOC and not 0
-- resize string before returning (to remove '\000' padding)
Also converted some compression routines to use PyString instead of
buffer.
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Change default alloc size for uncompressing to 16K.
Remove comment about core dumps when an invalid window sizes is used.
This bug has been fixed in zlib 1.0.4.
Two new optional arguments to decompress, wbits and bufsize. wbits
specifies the window size and bufsize specifies the initial output
string size.
In decompression code -- decompress and decompressobj methods -- use a
Python string (and _PyString_Resize) to collect the uncompressed
stream. Replaces a separate buffer that was copied into a string.
Fix bug in decompress that caused it to always realloc the buffer when
it was finished decompressing.
Modernized handling of optional arguments to compressobj.
Updated doc strings.
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realloc. (Fixed in PyZlib_unflush.)
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