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ca50ebd4
|
2016-12-03T10:27:14
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|
Create z_size_t and z_ssize_t types.
Normally these are set to size_t and ssize_t. But if they do not
exist, then they are set to the smallest integer type that can
contain a pointer. size_t is unsigned and ssize_t is signed.
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|
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c5ee34c2
|
2016-12-03T08:29:57
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Don't need to emit an empty fixed block when changing parameters.
gzsetparams() was using Z_PARTIAL_FLUSH when it could use Z_BLOCK
instead. This commit uses Z_BLOCK, which avoids emitting an
unnecessary ten bits into the stream.
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9dc5a858
|
2016-11-05T08:43:29
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|
Speed up deflation for level 0 (storing).
The previous code slid the window and the hash table and copied
every input byte three times in order to just write the data as
stored blocks with no compression. This commit minimizes sliding
and copying, especially for large input and output buffers.
Level 0 compression is now more than 20 times faster than before
the commit.
Most of the speedup is due to deferring hash table slides until
deflateParams() is called to change the compression level away
from 0. More speedup is due to copying directly from next_in to
next_out when the amounts of available input data and output space
permit it, avoiding the intermediate pending buffer. Additionally,
only the last 32K of the used input data is copied back to the
sliding window when large input buffers are provided.
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37281ac2
|
2016-11-15T20:45:01
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Add uncompress2() function, which returns the input size used.
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7161ad76
|
2016-11-22T23:29:19
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|
Assure that deflateParams() will not switch functions mid-block.
This alters the specification in zlib.h, so that deflateParams()
will not change any parameters if there is not enough output space
in the event that a block is emitted in order to allow switching
the compression function.
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123f9cfa
|
2016-12-03T08:18:56
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Clean up gz* function return values.
In some cases the return values did not match the documentation,
or the documentation did not document all of the return values.
gzprintf() now consistently returns negative values on error,
which matches the behavior of the stdio fprintf() function.
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1101ea79
|
2016-11-22T12:02:29
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Explicitly ignore a return value in gzwrite.c.
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21c66cd5
|
2016-11-20T11:36:15
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Increase verbosity required to warn about bit length overflow.
When debugging the Huffman coding would warn about resulting codes
greater than 15 bits in length. This is handled properly, and is
not uncommon. This increases the verbosity of the warning by one,
so that it is not displayed by default.
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001300d0
|
2016-11-14T10:19:25
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Minor edits to the documentation in source file contents.
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9674807c
|
2016-11-05T22:55:34
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Fix bugs in creating a very large gzip header.
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fc130cdd
|
2016-10-30T09:33:25
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Add --debug (-d) option to ./configure to define ZLIB_DEBUG.
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a456d898
|
2016-10-30T09:25:32
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Use memcpy for stored blocks.
This speeds up level 0 by about a factor of three, as compared to
the previous byte-at-a-time loop. We can do much better though. A
later commit avoids this copy for level 0 with large buffers,
instead copying directly from the input to the output. This commit
still speeds up storing incompressible data found when compressing
normally.
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03614c56
|
2016-10-30T08:36:13
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Fix some typos.
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94575859
|
2016-10-27T22:50:43
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|
Fix bug when level 0 used with Z_HUFFMAN or Z_RLE.
Compression level 0 requests no compression, using only stored
blocks. When Z_HUFFMAN or Z_RLE was used with level 0 (granted,
an odd choice, but permitted), the resulting blocks were mostly
fixed or dynamic. The reason is that deflate_stored() was not
being called in that case. The compressed data was valid, but it
was not what the application requested. This commit assures that
only stored blocks are emitted for compression level 0, regardless
of the strategy selected.
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bedea248
|
2016-10-26T10:25:10
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Clean up and comment the use of local for static.
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ce12c5cd
|
2016-10-25T20:45:41
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|
Make a noble effort at setting OS_CODE correctly.
This updates the OS_CODE determination at compile time to match as
closely as possible the operating system mappings documented in
the PKWare APPNOTE.TXT version 6.3.4, section 4.4.2.2. That byte
in the gzip header is used by nobody for anything, as far as I can
tell. However we might as well try to set it appropriately.
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b516b4bd
|
2016-10-24T20:11:41
|
|
Do a more thorough check of the state for every stream call.
This verifies that the state has been initialized, that it is the
expected type of state, deflate or inflate, and that at least the
first several bytes of the internal state have not been clobbered.
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77fd7e56
|
2016-10-24T16:00:51
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|
Document the rejection of 256-byte window requests in zlib.h.
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049578f0
|
2016-10-24T15:52:19
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|
Reject a window size of 256 bytes if not using the zlib wrapper.
There is a bug in deflate for windowBits == 8 (256-byte window).
As a result, zlib silently changes a request for 8 to a request
for 9 (512-byte window), and sets the zlib header accordingly so
that the decompressor knows to use a 512-byte window. However if
deflateInit2() is used for raw deflate or gzip streams, then there
is no indication that the request was not honored, and the
application might assume that it can use a 256-byte window when
decompressing. This commit returns an error if the user requests
a 256-byte window when using raw deflate or gzip encoding.
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a0bf0f31
|
2016-10-14T13:30:18
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Avoid obfuscating use of default case in inftrees.c.
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|
da64f173
|
2016-10-14T13:18:58
|
|
Move macro definition in deflate.c to where it is used.
This avoid defining a macro that is never used when not debugging.
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ebbc5739
|
2016-10-14T13:16:07
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|
Avoid recursive gzgetc() macro call.
Recursive macro calls are normally caught by the preprocessor and
avoided. This commit avoids the possibility of a problem entirely.
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7d6956b6
|
2016-10-14T13:10:54
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Make globals in examples local to compilation unit.
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8b95fa19
|
2016-10-11T22:21:04
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|
Add --warn option to ./configure, instead of environment variable.
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7096424f
|
2016-10-11T22:15:50
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|
Clean up type conversions.
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2edb94a3
|
2016-10-11T18:38:20
|
|
Avoid casting an out-of-range value to long.
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|
e08118c4
|
2016-10-03T22:33:26
|
|
Note the violation of the strict aliasing rule in crc32.c.
See the comment for more details. This is in response to an issue
raised as a result of a security audit of the zlib code by Trail
of Bits and TrustInSoft, in support of the Mozilla Foundation.
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d1d57749
|
2016-09-28T20:20:25
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|
Avoid pre-decrement of pointer in big-endian CRC calculation.
There was a small optimization for PowerPCs to pre-increment a
pointer when accessing a word, instead of post-incrementing. This
required prefacing the loop with a decrement of the pointer,
possibly pointing before the object passed. This is not compliant
with the C standard, for which decrementing a pointer before its
allocated memory is undefined. When tested on a modern PowerPC
with a modern compiler, the optimization no longer has any effect.
Due to all that, and per the recommendation of a security audit of
the zlib code by Trail of Bits and TrustInSoft, in support of the
Mozilla Foundation, this "optimization" was removed, in order to
avoid the possibility of undefined behavior.
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6a043145
|
2016-09-21T23:35:50
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|
Remove offset pointer optimization in inftrees.c.
inftrees.c was subtracting an offset from a pointer to an array,
in order to provide a pointer that allowed indexing starting at
the offset. This is not compliant with the C standard, for which
the behavior of a pointer decremented before its allocated memory
is undefined. Per the recommendation of a security audit of the
zlib code by Trail of Bits and TrustInSoft, in support of the
Mozilla Foundation, this tiny optimization was removed, in order
to avoid the possibility of undefined behavior.
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9aaec95e
|
2016-09-21T22:25:21
|
|
Use post-increment only in inffast.c.
An old inffast.c optimization turns out to not be optimal anymore
with modern compilers, and furthermore was not compliant with the
C standard, for which decrementing a pointer before its allocated
memory is undefined. Per the recommendation of a security audit of
the zlib code by Trail of Bits and TrustInSoft, in support of the
Mozilla Foundation, this "optimization" was removed, in order to
avoid the possibility of undefined behavior.
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3fb251b3
|
2016-09-21T20:07:37
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|
Remove dummy structure declarations for old buggy compilers.
While woolly mammoths still roamed the Earth and before Atlantis
sunk into the ocean, there were C compilers that could not handle
forward structure references, e.g. "struct name;". zlib dutifully
provided a work-around for such compilers. That work-around is no
longer needed, and, per the recommendation of a security audit of
the zlib code by Trail of Bits and TrustInSoft, in support of the
Mozilla Foundation, should be removed since what a compiler will
do with this is technically undefined. From the report: "there is
no telling what interactions the bug could have in the future with
link-time optimizations and type-based alias analyses, both
features that are present (but not default) in clang."
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33a7aff4
|
2016-09-21T08:45:59
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|
Fix typo.
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|
9852c209
|
2016-09-20T18:49:21
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|
Add option to not compute or check check values.
The undocumented (except in these commit comments) function
inflateValidate(strm, check) can be called after an inflateInit(),
inflateInit2(), or inflateReset2() with check equal to zero to
turn off the check value (CRC-32 or Adler-32) computation and
comparison. Calling with check not equal to zero turns checking
back on. This should only be called immediately after the init or
reset function. inflateReset() does not change the state, so a
previous inflateValidate() setting will remain in effect.
This also turns off validation of the gzip header CRC when
present.
This should only be used when a zlib or gzip stream has already
been checked, and repeated decompressions of the same stream no
longer need to be validated.
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93b0af4a
|
2016-09-20T17:27:28
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|
Correct the size of the inflate state in the comments.
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70a8763b
|
2016-07-10T11:43:17
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|
Fix typo in blast.c.
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|
2bcfc311
|
2016-06-17T19:36:10
|
|
Add configure.log to .gitignore.
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|
4f1df003
|
2016-04-05T03:09:59
|
|
Loop on write() calls in gzwrite.c in case of non-blocking I/O.
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4423fef8
|
2016-01-29T23:24:55
|
|
Fix gzseek() problem on MinGW due to buggy _lseeki64 there.
|
|
|
6cef1de7
|
2015-11-26T22:52:25
|
|
Fix bug that accepted invalid zlib header when windowBits is zero.
When windowBits is zero, the size of the sliding window comes from
the zlib header. The allowed values of the four-bit field are
0..7, but when windowBits is zero, values greater than 7 are
permitted and acted upon, resulting in large, mostly unused memory
allocations. This fix rejects such invalid zlib headers.
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|
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8f1b3744
|
2015-10-04T11:45:00
|
|
Use a consistent and more modern approach to not use a parameter.
A remarkably creative and diverse set of approaches to letting the
compiler know that opaque was being used when it wasn't is changed
by this commit to the more standard (void)opaque.
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f77c9823
|
2015-09-16T15:40:00
|
|
Use UTF-8 for non-ASCII characters in ChangeLog.
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|
44ae761d
|
2015-09-05T18:56:55
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|
Clean up portability for shifts and integer sizes.
|
|
|
e54e1299
|
2015-09-05T17:45:55
|
|
Avoid shifts of negative values inflateMark().
The C standard says that bit shifts of negative integers is
undefined. This casts to unsigned values to assure a known
result.
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27ef0266
|
2015-08-15T18:14:50
|
|
Fix typo.
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82e9dc60
|
2015-08-15T18:04:50
|
|
Use const for static tree descriptions in deflate.
This is in order to permit shared memory for these structures.
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55d98b4c
|
2015-08-02T14:46:58
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|
Allow building zlib outside of the source directory.
To build, simply run configure from the source directory by
specifying its path. That path will be used to find the source
files. The source directory will not be touched. All new and
modified files will be made in the current directory. Discovered
in the process that not all makes understand % or $<, and not all
compilers understand -include or -I-. This required a larger
Makefile.in with explicit dependencies.
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bfcace04
|
2015-08-02T16:47:14
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Do not initialize unsigned with -1 in compress.c uncompr.c.
Sun compiler complained. Use (unsigned)0 - 1 instead.
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|
43bfaba3
|
2015-08-02T00:02:07
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|
Align deflateParams() and its documentation in zlib.h.
This updates the documentation to reflect the behavior of
deflateParams() when it is not able to compress all of the input
data provided so far due to insufficient output space. It also
assures that data provided is compressed before the parameter
changes, even if at the beginning of the stream.
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b4ce6caf
|
2015-08-01T17:38:56
|
|
Compile the gzopen_w() function when __CYGWIN__ defined.
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2fc6d667
|
2015-07-28T23:32:35
|
|
Define _POSIX_SOURCE to enable POSIX extensions on some systems.
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|
|
5701f48c
|
2015-07-28T23:17:49
|
|
Clarify deflateReset() documentation.
It previously could have been misinterpreted to mean that parameter
changes after deflateInit2() would be reversed, which is not the
case.
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|
|
c901a34c
|
2015-07-28T23:13:53
|
|
Avoid uninitialized access by gzclose_w().
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|
|
51a223de
|
2015-07-28T22:44:31
|
|
Avoid use of DEBUG macro -- change to ZLIB_DEBUG.
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|
|
0b223371
|
2015-07-28T21:55:09
|
|
Avoid use of reallocf() in test/infcover.c.
|
|
|
0db8fd37
|
2015-07-28T21:41:20
|
|
Fix inflateInit2() bug when windowBits is 16 or 32.
A windowBits value of 0, 16, or 32 gets the window bits from the
zlib header. However there is no zlib header for 16, or for 32
when the input is gzip. This commit sets the window bits for
inflate to 15 if a gzip stream is detected and windowBits was 16
or 32.
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b56d1c62
|
2015-07-28T21:06:06
|
|
Add comment about not using windowBits of 8 for deflate().
|
|
|
e7ebb399
|
2015-07-07T20:11:01
|
|
Put license in zlib.3 man page.
Previously there was a confusing reference to a "distribution
directory".
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|
|
95698093
|
2015-07-05T18:14:53
|
|
Improve speed of gzprintf() in transparent mode.
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|
|
8a979f6c
|
2015-07-05T13:51:50
|
|
Avoid left shift of a negative value in flush rank calculation.
The C standard permits an undefined result for a left shift of a
negative value.
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|
|
9859a94c
|
2015-01-26T21:41:26
|
|
Remedy Coverity warning. [Randers-Pehrson]
|
|
|
5370d99a
|
2014-12-29T00:18:42
|
|
Add inflateCodesUsed() function for internal use.
|
|
|
283520ba
|
2014-07-02T16:34:22
|
|
Fix bug in test/example.c where error code not saved.
|
|
|
9cbda797
|
2014-04-26T08:12:37
|
|
Note in zlib.h that compress() uses Z_DEFAULT_COMPRESSION.
|
|
|
7d54c694
|
2014-04-26T08:04:09
|
|
Fix uncompress() to work on lengths more than a maximum unsigned.
|
|
|
f898bbed
|
2014-04-25T21:52:19
|
|
Fix compress() to work on lengths more than a maximum unsigned.
|
|
|
72c70060
|
2014-04-24T19:45:36
|
|
Assure that gzoffset() is correct when appending.
An open() with O_APPEND followed by an lseek() to determine the
position will return zero for a non-empty file, even though the
next write will start at the end of the file. This commit works
around that by doing an lseek() to the end when appending.
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|
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799c87c0
|
2013-08-24T01:53:31
|
|
Improve contrib/blast to return unused bytes. Fix the test code
to report the count of unused bytes at the end correctly. Add the
ability to provide initial input to blast().
|
|
|
89e335ab
|
2013-08-03T18:13:23
|
|
Fix contrib/minizip to permit unzipping with desktop API [Zouzou].
|
|
|
303d92cf
|
2013-05-23T20:11:54
|
|
Spacing cleanup.
|
|
|
ceeb615f
|
2013-05-02T23:12:54
|
|
Change version number to 1.2.8.1.
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|
|
50893291
|
2013-04-28T16:03:34
|
|
zlib 1.2.8
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|
|
5b5da456
|
2013-04-28T17:21:50
|
|
Fix mixed line endings in contrib/vstudio.
|
|
|
2dad5389
|
2013-04-28T15:36:25
|
|
Correct spelling error in zlib.h.
|
|
|
b4d80282
|
2013-04-18T21:47:59
|
|
Clean up contrib/vstudio [Roß].
|
|
|
f5ec2634
|
2013-04-18T21:38:15
|
|
Update some copyright years.
|
|
|
bddc968b
|
2013-04-14T10:31:31
|
|
Do not force Z_CONST for C++.
Forcing Z_CONST resulted in an issue when compiling Firefox. Now
if someone wants to compile zlib as C++ code (which it isn't), now
they will need to #define Z_CONST themselves.
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|
|
5481269e
|
2013-04-14T10:05:43
|
|
Update contrib/minizip/iowin32.c for Windows RT [Vollant].
|
|
|
e8fee0ea
|
2013-04-13T21:38:26
|
|
Change version number to 1.2.8.
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|
|
b7bc3884
|
2013-04-13T21:18:35
|
|
zlib 1.2.7.3
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|
|
c7140720
|
2013-04-13T19:11:47
|
|
Fix version numbers and DLL names in contrib/vstudio/*/zlib.rc.
|
|
|
388a285c
|
2013-04-13T18:58:46
|
|
Change version number to 1.2.7.3.
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|
|
139c67fc
|
2013-04-13T18:15:42
|
|
zlib 1.2.7.2
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|
|
70252daf
|
2013-04-13T18:04:06
|
|
Add casts in gzwrite.c for pointer differences.
|
|
|
9b703f20
|
2013-04-13T17:54:57
|
|
Fix typo in win32/Makefile.msc.
|
|
|
5d33c62c
|
2013-04-13T15:54:03
|
|
Change check for a four-byte type back to hexadecimal.
|
|
|
8a93f49c
|
2013-04-13T08:08:57
|
|
Change version number to 1.2.7.2.
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0b166094
|
2013-03-24T22:46:40
|
|
zlib 1.2.7.1
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|
f81b79c5
|
2013-03-24T22:30:40
|
|
Line length cleanup.
|
|
|
c661c374
|
2013-03-24T22:12:31
|
|
Do not return Z_BUF_ERROR if deflateParam() has nothing to write.
If the compressed data was already at a block boundary, then
deflateParam() would report Z_BUF_ERROR, because there was nothing
to write. With this patch, Z_OK is returned in that case.
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|
|
81c3068b
|
2013-03-24T16:57:32
|
|
In Makefile uninstall, don't rm if preceding cd fails.
|
|
|
d3b613e3
|
2013-03-24T16:56:05
|
|
Minor spacing cleanup in a comment in gzguts.h.
|
|
318a5e19
|
2010-07-06T20:06:08
|
|
Add man pages for minizip and miniunzip.
|
|
|
e9f0b784
|
2013-03-24T15:18:02
|
|
Add casts and consts to ease user conversion to C++.
You would still need to run zlib2ansi on all of the *.c files.
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|
|
0aac8cf7
|
2013-03-23T23:47:15
|
|
Clean up the addition of gzvprintf.
|
|
|
f0546c8e
|
2013-03-23T22:57:27
|
|
Clean up the addition of inflateGetDictionary.
|
|
|
03ff48cc
|
2013-03-23T22:27:43
|
|
Remove runtime check in configure for four-byte integer type.
That didn't work when cross-compiling. Simply rely on limits.h.
If a compiler does not have limits.h, then zconf.h.in should be
modified to define Z_U4 as an unsiged four-byte integer type in
order for crc32() to be fast.
This also simplifies and makes more portable to check for a four-
byte type using limits.h.
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|
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66fcefbb
|
2013-03-23T13:50:10
|
|
Fix configure for Sun shell.
|
|
|
b06dee43
|
2013-03-22T18:32:37
|
|
Add gzvprintf() as an undocumented function in zlib.
The function is only available if stdarg.h is available.
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dd5d0940
|
2013-03-22T17:38:37
|
|
Add vc11 and vc12 build files to contrib/vstudio.
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|
|
a2d71e8e
|
2013-02-24T00:16:24
|
|
Fix typos in the use of _LARGEFILE64_SOURCE in zconf.h.
|