Update zlib to 1.2.11
Reapply and regenerate all local patches to upstream zlib 1.2.11
Explicitly specify 9 as the minimum windowBits value (representing a
512-byte window) during compression in net/websockets even when 8
(representing 256) is received. This was previously silently done during
compression. Because of how zlib's deflate is implemented, when
windowBits is 9, it will produce a stream that can be decompressed with
a 250-byte or larger window.
Changes in 1.2.9 (31 Dec 2016)
- Fix contrib/minizip to permit unzipping with desktop API [Zouzou]
- Improve contrib/blast to return unused bytes
- Assure that gzoffset() is correct when appending
- Improve compress() and uncompress() to support large lengths
- Fix bug in test/example.c where error code not saved
- Remedy Coverity warning [Randers-Pehrson]
- Improve speed of gzprintf() in transparent mode
- Fix inflateInit2() bug when windowBits is 16 or 32
- Change DEBUG macro to ZLIB_DEBUG
- Avoid uninitialized access by gzclose_w()
- Allow building zlib outside of the source directory
- Fix bug that accepted invalid zlib header when windowBits is zero
- Fix gzseek() problem on MinGW due to buggy _lseeki64 there
- Loop on write() calls in gzwrite.c in case of non-blocking I/O
- Add --warn (-w) option to ./configure for more compiler warnings
- Reject a window size of 256 bytes if not using the zlib wrapper
- Fix bug when level 0 used with Z_HUFFMAN or Z_RLE
- Add --debug (-d) option to ./configure to define ZLIB_DEBUG
- Fix bugs in creating a very large gzip header
- Add uncompress2() function, which returns the input size used
- Assure that deflateParams() will not switch functions mid-block
- Dramatically speed up deflation for level 0 (storing)
- Add gzfread(), duplicating the interface of fread()
- Add gzfwrite(), duplicating the interface of fwrite()
- Add deflateGetDictionary() function
- Use snprintf() for later versions of Microsoft C
- Fix *Init macros to use z_ prefix when requested
- Replace as400 with os400 for OS/400 support [Monnerat]
- Add crc32_z() and adler32_z() functions with size_t lengths
- Update Visual Studio project files [AraHaan]
Changes in 1.2.10 (2 Jan 2017)
- Avoid warnings on snprintf() return value
- Fix bug in deflate_stored() for zero-length input
- Fix bug in gzwrite.c that produced corrupt gzip files
- Remove files to be installed before copying them in Makefile.in
- Add warnings when compiling with assembler code
Changes in 1.2.11 (15 Jan 2017)
- Fix deflate stored bug when pulling last block from window
- Permit immediate deflateParams changes before any deflate input
BUG=691074, 691075
Review-Url: https://codereview.chromium.org/2690623003
Cr-Original-Commit-Position: refs/heads/master@{#450585}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 6d9a6251dfe87183075dc16cfa134e41dc4cee0d
diff --git a/BUILD.gn b/BUILD.gn
index a338460..5086563 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -60,7 +60,7 @@
"inflate.h",
"inftrees.c",
"inftrees.h",
- "mozzconf.h",
+ "names.h",
"trees.c",
"trees.h",
"uncompr.c",
diff --git a/LICENSE b/LICENSE
index babc0f0..9f05686 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,27 +1,19 @@
-/* zlib.h -- interface of the 'zlib' general purpose compression library
- version 1.2.4, March 14th, 2010
+version 1.2.11, January 15th, 2017
- Copyright (C) 1995-2010 Jean-loup Gailly and Mark Adler
+Copyright (C) 1995-2017 Jean-loup Gailly and Mark Adler
- This software is provided 'as-is', without any express or implied
- warranty. In no event will the authors be held liable for any damages
- arising from the use of this software.
+This software is provided 'as-is', without any express or implied
+warranty. In no event will the authors be held liable for any damages
+arising from the use of this software.
- Permission is granted to anyone to use this software for any purpose,
- including commercial applications, and to alter it and redistribute it
- freely, subject to the following restrictions:
+Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it
+freely, subject to the following restrictions:
- 1. The origin of this software must not be misrepresented; you must not
- claim that you wrote the original software. If you use this software
- in a product, an acknowledgment in the product documentation would be
- appreciated but is not required.
- 2. Altered source versions must be plainly marked as such, and must not be
- misrepresented as being the original software.
- 3. This notice may not be removed or altered from any source distribution.
-
- Jean-loup Gailly
- Mark Adler
-
-*/
-
-mozzconf.h is distributed under the MPL 1.1/GPL 2.0/LGPL 2.1 tri-license.
+1. The origin of this software must not be misrepresented; you must not
+ claim that you wrote the original software. If you use this software
+ in a product, an acknowledgment in the product documentation would be
+ appreciated but is not required.
+2. Altered source versions must be plainly marked as such, and must not be
+ misrepresented as being the original software.
+3. This notice may not be removed or altered from any source distribution.
diff --git a/README.chromium b/README.chromium
index ea58bd7..fe6bc10 100644
--- a/README.chromium
+++ b/README.chromium
@@ -1,43 +1,28 @@
Name: zlib
+Short Name: zlib
URL: http://zlib.net/
-Version: 1.2.8
+Version: 1.2.11
Security Critical: yes
License: Custom license
+License File: LICENSE
License Android Compatible: yes
Description:
-General purpose compression library
+"A massively spiffy yet delicately unobtrusive compression library."
+
+zlib is a free, general-purpose, legally unencumbered lossless data-compression
+library. zlib implements the "deflate" compression algorithm described by RFC
+1951, which combines the LZ77 (Lempel-Ziv) algorithm with Huffman coding. zlib
+also implements the zlib (RFC 1950) and gzip (RFC 1952) wrapper formats.
Local Modifications:
-A few minor changes, all marked with "Google":
-- Added #ifdefs to avoid compile warnings when NO_GZCOMPRESS is defined.
-- Removed use of strerror for WinCE in gzio.c.
-- Added 'int z_errno' global for WinCE, to which 'errno' is defined in zutil.h.
-- Added 'mozzconf.h' to mangle the function names.
-- Added logic in zlib.h to undef our earlier mangles when defaulting to 64 bit offset versions of API.
-- Added casts to suppress VC++ warnings
-The 'google.patch' file represents our changes from the original zlib-1.2.5.
-
-Integrated Intel SIMD optimisations from: https://github.com/jtkukunas/zlib/
-and modified to accomodate the older version and existing changes in tree.
-
-This introduces new files: simd_stub.c, crc_folding.c, fill_window_sse.c and
-x86.[ch]. All but the latter are built into a static library to allow the
-compiler to use the desired instructions only when valid. The latter version is
-only built on x86 (32-bit and 64-bit) systems with it's functionality stubbed
-on the others.
-
-Other changes to accomodate:
-- fill_window() implementation calls into _sse() variant when supported and the
- original implementation renamed to _c()
-- read_buf was moved from local to ZLIB_INTERNAL for fill_window_sse.c to use
-- INSERT_STRING macro was made a function, insert_string() and an implementation using CRC instruction added
-- some crc funcionality moved into crc32.c
-
-Update to zlib-1.2.8, generate a third patch which includes the jtkukunas optimisations. We may merge some more from jtkukunas branch later.
-Currently we upgrade to madler's version 1.2.8,merged SIMD optimisation and
-some other changes above.
-The step as follows:
-1.download a clean madler zlib from github.
-2.apply google.patch, simd.patch sequencely.
-3.update these patches.
+ - Only source code from the zlib distribution used to build the zlib and
+ minizip libraries are present. Many other files have been omitted. Only *.c
+ and *.h files from the upstream root directory and contrib/minizip were
+ imported.
+ - The contents of the google directory are original Chromium-specific
+ additions.
+ - google.patch contains changes from the upstream version, mostly related to
+ the build.
+ - Intel SIMD optimisations from https://github.com/jtkukunas/zlib/ have been
+ integrated. These changes are reflected in simd.patch.
diff --git a/adler32.c b/adler32.c
index a868f07..d0be438 100644
--- a/adler32.c
+++ b/adler32.c
@@ -1,5 +1,5 @@
/* adler32.c -- compute the Adler-32 checksum of a data stream
- * Copyright (C) 1995-2011 Mark Adler
+ * Copyright (C) 1995-2011, 2016 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@@ -7,11 +7,9 @@
#include "zutil.h"
-#define local static
-
local uLong adler32_combine_ OF((uLong adler1, uLong adler2, z_off64_t len2));
-#define BASE 65521 /* largest prime smaller than 65536 */
+#define BASE 65521U /* largest prime smaller than 65536 */
#define NMAX 5552
/* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
@@ -62,10 +60,10 @@
#endif
/* ========================================================================= */
-uLong ZEXPORT adler32(adler, buf, len)
+uLong ZEXPORT adler32_z(adler, buf, len)
uLong adler;
const Bytef *buf;
- uInt len;
+ z_size_t len;
{
unsigned long sum2;
unsigned n;
@@ -133,6 +131,15 @@
}
/* ========================================================================= */
+uLong ZEXPORT adler32(adler, buf, len)
+ uLong adler;
+ const Bytef *buf;
+ uInt len;
+{
+ return adler32_z(adler, buf, len);
+}
+
+/* ========================================================================= */
local uLong adler32_combine_(adler1, adler2, len2)
uLong adler1;
uLong adler2;
@@ -156,7 +163,7 @@
sum2 += ((adler1 >> 16) & 0xffff) + ((adler2 >> 16) & 0xffff) + BASE - rem;
if (sum1 >= BASE) sum1 -= BASE;
if (sum1 >= BASE) sum1 -= BASE;
- if (sum2 >= (BASE << 1)) sum2 -= (BASE << 1);
+ if (sum2 >= ((unsigned long)BASE << 1)) sum2 -= ((unsigned long)BASE << 1);
if (sum2 >= BASE) sum2 -= BASE;
return sum1 | (sum2 << 16);
}
diff --git a/compress.c b/compress.c
index 6e97626..e2db404 100644
--- a/compress.c
+++ b/compress.c
@@ -1,5 +1,5 @@
/* compress.c -- compress a memory buffer
- * Copyright (C) 1995-2005 Jean-loup Gailly.
+ * Copyright (C) 1995-2005, 2014, 2016 Jean-loup Gailly, Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@@ -28,16 +28,11 @@
{
z_stream stream;
int err;
+ const uInt max = (uInt)-1;
+ uLong left;
- stream.next_in = (z_const Bytef *)source;
- stream.avail_in = (uInt)sourceLen;
-#ifdef MAXSEG_64K
- /* Check for source > 64K on 16-bit machine: */
- if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR;
-#endif
- stream.next_out = dest;
- stream.avail_out = (uInt)*destLen;
- if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR;
+ left = *destLen;
+ *destLen = 0;
stream.zalloc = (alloc_func)0;
stream.zfree = (free_func)0;
@@ -46,15 +41,26 @@
err = deflateInit(&stream, level);
if (err != Z_OK) return err;
- err = deflate(&stream, Z_FINISH);
- if (err != Z_STREAM_END) {
- deflateEnd(&stream);
- return err == Z_OK ? Z_BUF_ERROR : err;
- }
- *destLen = stream.total_out;
+ stream.next_out = dest;
+ stream.avail_out = 0;
+ stream.next_in = (z_const Bytef *)source;
+ stream.avail_in = 0;
- err = deflateEnd(&stream);
- return err;
+ do {
+ if (stream.avail_out == 0) {
+ stream.avail_out = left > (uLong)max ? max : (uInt)left;
+ left -= stream.avail_out;
+ }
+ if (stream.avail_in == 0) {
+ stream.avail_in = sourceLen > (uLong)max ? max : (uInt)sourceLen;
+ sourceLen -= stream.avail_in;
+ }
+ err = deflate(&stream, sourceLen ? Z_NO_FLUSH : Z_FINISH);
+ } while (err == Z_OK);
+
+ *destLen = stream.total_out;
+ deflateEnd(&stream);
+ return err == Z_STREAM_END ? Z_OK : err;
}
/* ===========================================================================
diff --git a/contrib/minizip/iowin32.c b/contrib/minizip/iowin32.c
index 0467c31..246ceb9 100644
--- a/contrib/minizip/iowin32.c
+++ b/contrib/minizip/iowin32.c
@@ -32,8 +32,9 @@
#endif
#if _WIN32_WINNT >= _WIN32_WINNT_WIN8
+// see Include/shared/winapifamily.h in the Windows Kit
#if defined(WINAPI_FAMILY_PARTITION) && (!(defined(IOWIN32_USING_WINRT_API)))
-#if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
+#if WINAPI_FAMILY_ONE_PARTITION(WINAPI_FAMILY, WINAPI_PARTITION_APP)
#define IOWIN32_USING_WINRT_API 1
#endif
#endif
diff --git a/contrib/minizip/unzip.c b/contrib/minizip/unzip.c
index 2d5f0b1..199b472 100644
--- a/contrib/minizip/unzip.c
+++ b/contrib/minizip/unzip.c
@@ -200,7 +200,7 @@
/* ===========================================================================
Read a byte from a gz_stream; update next_in and avail_in. Return EOF
for end of file.
- IN assertion: the stream s has been sucessfully opened for reading.
+ IN assertion: the stream s has been successfully opened for reading.
*/
diff --git a/contrib/minizip/zip.c b/contrib/minizip/zip.c
index aaf6961..65c0c72 100644
--- a/contrib/minizip/zip.c
+++ b/contrib/minizip/zip.c
@@ -15,7 +15,7 @@
Oct-2009 - Mathias Svensson - Did some code cleanup and refactoring to get better overview of some functions.
Oct-2009 - Mathias Svensson - Added zipRemoveExtraInfoBlock to strip extra field data from its ZIP64 data
It is used when recreting zip archive with RAW when deleting items from a zip.
- ZIP64 data is automaticly added to items that needs it, and existing ZIP64 data need to be removed.
+ ZIP64 data is automatically added to items that needs it, and existing ZIP64 data need to be removed.
Oct-2009 - Mathias Svensson - Added support for BZIP2 as compression mode (bzip2 lib is required)
Jan-2010 - back to unzip and minizip 1.0 name scheme, with compatibility layer
@@ -116,7 +116,7 @@
struct linkedlist_datablock_internal_s* next_datablock;
uLong avail_in_this_block;
uLong filled_in_this_block;
- uLong unused; /* for future use and alignement */
+ uLong unused; /* for future use and alignment */
unsigned char data[SIZEDATA_INDATABLOCK];
} linkedlist_datablock_internal;
@@ -171,7 +171,7 @@
curfile64_info ci; /* info on the file curretly writing */
ZPOS64_T begin_pos; /* position of the beginning of the zipfile */
- ZPOS64_T add_position_when_writting_offset;
+ ZPOS64_T add_position_when_writing_offset;
ZPOS64_T number_entry;
#ifndef NO_ADDFILEINEXISTINGZIP
@@ -807,7 +807,7 @@
}
byte_before_the_zipfile = central_pos - (offset_central_dir+size_central_dir);
- pziinit->add_position_when_writting_offset = byte_before_the_zipfile;
+ pziinit->add_position_when_writing_offset = byte_before_the_zipfile;
{
ZPOS64_T size_central_dir_to_read = size_central_dir;
@@ -875,7 +875,7 @@
ziinit.in_opened_file_inzip = 0;
ziinit.ci.stream_initialised = 0;
ziinit.number_entry = 0;
- ziinit.add_position_when_writting_offset = 0;
+ ziinit.add_position_when_writing_offset = 0;
init_linkedlist(&(ziinit.central_dir));
@@ -1164,7 +1164,7 @@
if(zi->ci.pos_local_header >= 0xffffffff)
zip64local_putValue_inmemory(zi->ci.central_header+42,(uLong)0xffffffff,4);
else
- zip64local_putValue_inmemory(zi->ci.central_header+42,(uLong)zi->ci.pos_local_header - zi->add_position_when_writting_offset,4);
+ zip64local_putValue_inmemory(zi->ci.central_header+42,(uLong)zi->ci.pos_local_header - zi->add_position_when_writing_offset,4);
for (i=0;i<size_filename;i++)
*(zi->ci.central_header+SIZECENTRALHEADER+i) = *(filename+i);
@@ -1755,7 +1755,7 @@
int Write_Zip64EndOfCentralDirectoryLocator(zip64_internal* zi, ZPOS64_T zip64eocd_pos_inzip)
{
int err = ZIP_OK;
- ZPOS64_T pos = zip64eocd_pos_inzip - zi->add_position_when_writting_offset;
+ ZPOS64_T pos = zip64eocd_pos_inzip - zi->add_position_when_writing_offset;
err = zip64local_putValue(&zi->z_filefunc,zi->filestream,(uLong)ZIP64ENDLOCHEADERMAGIC,4);
@@ -1808,7 +1808,7 @@
if (err==ZIP_OK) /* offset of start of central directory with respect to the starting disk number */
{
- ZPOS64_T pos = centraldir_pos_inzip - zi->add_position_when_writting_offset;
+ ZPOS64_T pos = centraldir_pos_inzip - zi->add_position_when_writing_offset;
err = zip64local_putValue(&zi->z_filefunc,zi->filestream, (ZPOS64_T)pos,8);
}
return err;
@@ -1849,13 +1849,13 @@
if (err==ZIP_OK) /* offset of start of central directory with respect to the starting disk number */
{
- ZPOS64_T pos = centraldir_pos_inzip - zi->add_position_when_writting_offset;
+ ZPOS64_T pos = centraldir_pos_inzip - zi->add_position_when_writing_offset;
if(pos >= 0xffffffff)
{
err = zip64local_putValue(&zi->z_filefunc,zi->filestream, (uLong)0xffffffff,4);
}
else
- err = zip64local_putValue(&zi->z_filefunc,zi->filestream, (uLong)(centraldir_pos_inzip - zi->add_position_when_writting_offset),4);
+ err = zip64local_putValue(&zi->z_filefunc,zi->filestream, (uLong)(centraldir_pos_inzip - zi->add_position_when_writing_offset),4);
}
return err;
@@ -1921,7 +1921,7 @@
}
free_linkedlist(&(zi->central_dir));
- pos = centraldir_pos_inzip - zi->add_position_when_writting_offset;
+ pos = centraldir_pos_inzip - zi->add_position_when_writing_offset;
if(pos >= 0xffffffff || zi->number_entry > 0xFFFF)
{
ZPOS64_T Zip64EOCDpos = ZTELL64(zi->z_filefunc,zi->filestream);
diff --git a/crc32.c b/crc32.c
index 09228ed..9162429 100644
--- a/crc32.c
+++ b/crc32.c
@@ -1,5 +1,5 @@
/* crc32.c -- compute the CRC-32 of a data stream
- * Copyright (C) 1995-2006, 2010, 2011, 2012 Mark Adler
+ * Copyright (C) 1995-2006, 2010, 2011, 2012, 2016 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*
* Thanks to Rodney Brown <rbrown64@csc.com.au> for his contribution of faster
@@ -32,17 +32,15 @@
#include "x86.h"
#include "zutil.h" /* for STDC and FAR definitions */
-#define local static
-
/* Definitions for doing the crc four data bytes at a time. */
#if !defined(NOBYFOUR) && defined(Z_U4)
# define BYFOUR
#endif
#ifdef BYFOUR
local unsigned long crc32_little OF((unsigned long,
- const unsigned char FAR *, unsigned));
+ const unsigned char FAR *, z_size_t));
local unsigned long crc32_big OF((unsigned long,
- const unsigned char FAR *, unsigned));
+ const unsigned char FAR *, z_size_t));
# define TBLS 8
#else
# define TBLS 1
@@ -203,10 +201,10 @@
#define DO8 DO1; DO1; DO1; DO1; DO1; DO1; DO1; DO1
/* ========================================================================= */
-unsigned long ZEXPORT crc32(crc, buf, len)
+unsigned long ZEXPORT crc32_z(crc, buf, len)
unsigned long crc;
const unsigned char FAR *buf;
- uInt len;
+ z_size_t len;
{
if (buf == Z_NULL) return 0UL;
@@ -237,8 +235,29 @@
return crc ^ 0xffffffffUL;
}
+/* ========================================================================= */
+unsigned long ZEXPORT crc32(crc, buf, len)
+ unsigned long crc;
+ const unsigned char FAR *buf;
+ uInt len;
+{
+ return crc32_z(crc, buf, len);
+}
+
#ifdef BYFOUR
+/*
+ This BYFOUR code accesses the passed unsigned char * buffer with a 32-bit
+ integer pointer type. This violates the strict aliasing rule, where a
+ compiler can assume, for optimization purposes, that two pointers to
+ fundamentally different types won't ever point to the same memory. This can
+ manifest as a problem only if one of the pointers is written to. This code
+ only reads from those pointers. So long as this code remains isolated in
+ this compilation unit, there won't be a problem. For this reason, this code
+ should not be copied and pasted into a compilation unit in which other code
+ writes to the buffer that is passed to these routines.
+ */
+
/* ========================================================================= */
#define DOLIT4 c ^= *buf4++; \
c = crc_table[3][c & 0xff] ^ crc_table[2][(c >> 8) & 0xff] ^ \
@@ -249,7 +268,7 @@
local unsigned long crc32_little(crc, buf, len)
unsigned long crc;
const unsigned char FAR *buf;
- unsigned len;
+ z_size_t len;
{
register z_crc_t c;
register const z_crc_t FAR *buf4;
@@ -280,7 +299,7 @@
}
/* ========================================================================= */
-#define DOBIG4 c ^= *++buf4; \
+#define DOBIG4 c ^= *buf4++; \
c = crc_table[4][c & 0xff] ^ crc_table[5][(c >> 8) & 0xff] ^ \
crc_table[6][(c >> 16) & 0xff] ^ crc_table[7][c >> 24]
#define DOBIG32 DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4
@@ -289,7 +308,7 @@
local unsigned long crc32_big(crc, buf, len)
unsigned long crc;
const unsigned char FAR *buf;
- unsigned len;
+ z_size_t len;
{
register z_crc_t c;
register const z_crc_t FAR *buf4;
@@ -302,7 +321,6 @@
}
buf4 = (const z_crc_t FAR *)(const void FAR *)buf;
- buf4--;
while (len >= 32) {
DOBIG32;
len -= 32;
@@ -311,7 +329,6 @@
DOBIG4;
len -= 4;
}
- buf4++;
buf = (const unsigned char FAR *)buf4;
if (len) do {
diff --git a/deflate.c b/deflate.c
index 02fa2f6..aa0c9c6 100644
--- a/deflate.c
+++ b/deflate.c
@@ -1,5 +1,5 @@
/* deflate.c -- compress data using the deflation algorithm
- * Copyright (C) 1995-2013 Jean-loup Gailly and Mark Adler
+ * Copyright (C) 1995-2017 Jean-loup Gailly and Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@@ -53,7 +53,7 @@
#include "x86.h"
const char deflate_copyright[] =
- " deflate 1.2.8 Copyright 1995-2013 Jean-loup Gailly and Mark Adler ";
+ " deflate 1.2.11 Copyright 1995-2017 Jean-loup Gailly and Mark Adler ";
/*
If you use the zlib library in a product, an acknowledgment is welcome
in the documentation of your product. If for some reason you cannot
@@ -74,6 +74,8 @@
typedef block_state (*compress_func) OF((deflate_state *s, int flush));
/* Compression function. Returns the block state after the call. */
+local int deflateStateCheck OF((z_streamp strm));
+local void slide_hash OF((deflate_state *s));
local void fill_window OF((deflate_state *s));
local block_state deflate_stored OF((deflate_state *s, int flush));
local block_state deflate_fast OF((deflate_state *s, int flush));
@@ -85,22 +87,20 @@
local void lm_init OF((deflate_state *s));
local void putShortMSB OF((deflate_state *s, uInt b));
local void flush_pending OF((z_streamp strm));
-
+unsigned ZLIB_INTERNAL read_buf OF((z_streamp strm, Bytef *buf, unsigned size));
#ifdef ASMV
+# pragma message("Assembler code may have bugs -- use at your own risk")
void match_init OF((void)); /* asm code initialization */
uInt longest_match OF((deflate_state *s, IPos cur_match));
#else
local uInt longest_match OF((deflate_state *s, IPos cur_match));
#endif
-#ifdef DEBUG
+#ifdef ZLIB_DEBUG
local void check_match OF((deflate_state *s, IPos start, IPos match,
int length));
#endif
-/* For fill_window_sse.c to use */
-ZLIB_INTERNAL int read_buf OF((z_streamp strm, Bytef *buf, unsigned size));
-
/* From crc32.c */
extern void ZLIB_INTERNAL crc_reset(deflate_state *const s);
extern void ZLIB_INTERNAL crc_finalize(deflate_state *const s);
@@ -166,21 +166,14 @@
* meaning.
*/
-#define EQUAL 0
-/* result of memcmp for equal strings */
-
-#ifndef NO_DUMMY_DECL
-struct static_tree_desc_s {int dummy;}; /* for buggy compilers */
-#endif
-
/* rank Z_BLOCK between Z_NO_FLUSH and Z_PARTIAL_FLUSH */
-#define RANK(f) (((f) << 1) - ((f) > 4 ? 9 : 0))
+#define RANK(f) (((f) * 2) - ((f) > 4 ? 9 : 0))
/* ===========================================================================
* Update a hash value with the given input byte
- * IN assertion: all calls to to UPDATE_HASH are made with consecutive
- * input characters, so that a running hash key can be computed from the
- * previous key instead of complete recalculation each time.
+ * IN assertion: all calls to UPDATE_HASH are made with consecutive input
+ * characters, so that a running hash key can be computed from the previous
+ * key instead of complete recalculation each time.
*/
#define UPDATE_HASH(s,h,c) (h = (((h)<<s->hash_shift) ^ (c)) & s->hash_mask)
@@ -190,9 +183,9 @@
* the previous length of the hash chain.
* If this file is compiled with -DFASTEST, the compression level is forced
* to 1, and no hash chains are maintained.
- * IN assertion: all calls to to INSERT_STRING are made with consecutive
- * input characters and the first MIN_MATCH bytes of str are valid
- * (except for the last MIN_MATCH-1 bytes of the input file).
+ * IN assertion: all calls to INSERT_STRING are made with consecutive input
+ * characters and the first MIN_MATCH bytes of str are valid (except for
+ * the last MIN_MATCH-1 bytes of the input file).
*/
local INLINE Pos insert_string_c(deflate_state *const s, const Pos str)
{
@@ -225,6 +218,37 @@
s->head[s->hash_size-1] = NIL; \
zmemzero((Bytef *)s->head, (unsigned)(s->hash_size-1)*sizeof(*s->head));
+/* ===========================================================================
+ * Slide the hash table when sliding the window down (could be avoided with 32
+ * bit values at the expense of memory usage). We slide even when level == 0 to
+ * keep the hash table consistent if we switch back to level > 0 later.
+ */
+local void slide_hash(s)
+ deflate_state *s;
+{
+ unsigned n, m;
+ Posf *p;
+ uInt wsize = s->w_size;
+
+ n = s->hash_size;
+ p = &s->head[n];
+ do {
+ m = *--p;
+ *p = (Pos)(m >= wsize ? m - wsize : NIL);
+ } while (--n);
+ n = wsize;
+#ifndef FASTEST
+ p = &s->prev[n];
+ do {
+ m = *--p;
+ *p = (Pos)(m >= wsize ? m - wsize : NIL);
+ /* If n is not on any hash chain, prev[n] is garbage but
+ * its value will never be used.
+ */
+ } while (--n);
+#endif
+}
+
/* ========================================================================= */
int ZEXPORT deflateInit_(strm, level, version, stream_size)
z_streamp strm;
@@ -301,7 +325,7 @@
#endif
if (memLevel < 1 || memLevel > MAX_MEM_LEVEL || method != Z_DEFLATED ||
windowBits < 8 || windowBits > 15 || level < 0 || level > 9 ||
- strategy < 0 || strategy > Z_FIXED) {
+ strategy < 0 || strategy > Z_FIXED || (windowBits == 8 && wrap != 1)) {
return Z_STREAM_ERROR;
}
if (windowBits == 8) windowBits = 9; /* until 256-byte window bug fixed */
@@ -309,10 +333,11 @@
if (s == Z_NULL) return Z_MEM_ERROR;
strm->state = (struct internal_state FAR *)s;
s->strm = strm;
+ s->status = INIT_STATE; /* to pass state test in deflateReset() */
s->wrap = wrap;
s->gzhead = Z_NULL;
- s->w_bits = windowBits;
+ s->w_bits = (uInt)windowBits;
s->w_size = 1 << s->w_bits;
s->w_mask = s->w_size - 1;
@@ -326,7 +351,9 @@
s->hash_mask = s->hash_size - 1;
s->hash_shift = ((s->hash_bits+MIN_MATCH-1)/MIN_MATCH);
- s->window = (Bytef *) ZALLOC(strm, s->w_size + window_padding, 2*sizeof(Byte));
+ s->window = (Bytef *) ZALLOC(strm,
+ s->w_size + window_padding,
+ 2*sizeof(Byte));
s->prev = (Posf *) ZALLOC(strm, s->w_size, sizeof(Pos));
s->head = (Posf *) ZALLOC(strm, s->hash_size, sizeof(Pos));
@@ -355,6 +382,31 @@
return deflateReset(strm);
}
+/* =========================================================================
+ * Check for a valid deflate stream state. Return 0 if ok, 1 if not.
+ */
+local int deflateStateCheck (strm)
+ z_streamp strm;
+{
+ deflate_state *s;
+ if (strm == Z_NULL ||
+ strm->zalloc == (alloc_func)0 || strm->zfree == (free_func)0)
+ return 1;
+ s = strm->state;
+ if (s == Z_NULL || s->strm != strm || (s->status != INIT_STATE &&
+#ifdef GZIP
+ s->status != GZIP_STATE &&
+#endif
+ s->status != EXTRA_STATE &&
+ s->status != NAME_STATE &&
+ s->status != COMMENT_STATE &&
+ s->status != HCRC_STATE &&
+ s->status != BUSY_STATE &&
+ s->status != FINISH_STATE))
+ return 1;
+ return 0;
+}
+
/* ========================================================================= */
int ZEXPORT deflateSetDictionary (strm, dictionary, dictLength)
z_streamp strm;
@@ -367,7 +419,7 @@
unsigned avail;
z_const unsigned char *next;
- if (strm == Z_NULL || strm->state == Z_NULL || dictionary == Z_NULL)
+ if (deflateStateCheck(strm) || dictionary == Z_NULL)
return Z_STREAM_ERROR;
s = strm->state;
wrap = s->wrap;
@@ -421,13 +473,34 @@
}
/* ========================================================================= */
+int ZEXPORT deflateGetDictionary (strm, dictionary, dictLength)
+ z_streamp strm;
+ Bytef *dictionary;
+ uInt *dictLength;
+{
+ deflate_state *s;
+ uInt len;
+
+ if (deflateStateCheck(strm))
+ return Z_STREAM_ERROR;
+ s = strm->state;
+ len = s->strstart + s->lookahead;
+ if (len > s->w_size)
+ len = s->w_size;
+ if (dictionary != Z_NULL && len)
+ zmemcpy(dictionary, s->window + s->strstart + s->lookahead - len, len);
+ if (dictLength != Z_NULL)
+ *dictLength = len;
+ return Z_OK;
+}
+
+/* ========================================================================= */
int ZEXPORT deflateResetKeep (strm)
z_streamp strm;
{
deflate_state *s;
- if (strm == Z_NULL || strm->state == Z_NULL ||
- strm->zalloc == (alloc_func)0 || strm->zfree == (free_func)0) {
+ if (deflateStateCheck(strm)) {
return Z_STREAM_ERROR;
}
@@ -442,7 +515,11 @@
if (s->wrap < 0) {
s->wrap = -s->wrap; /* was made negative by deflate(..., Z_FINISH); */
}
- s->status = s->wrap ? INIT_STATE : BUSY_STATE;
+ s->status =
+#ifdef GZIP
+ s->wrap == 2 ? GZIP_STATE :
+#endif
+ s->wrap ? INIT_STATE : BUSY_STATE;
strm->adler =
#ifdef GZIP
s->wrap == 2 ? crc32(0L, Z_NULL, 0) :
@@ -472,8 +549,8 @@
z_streamp strm;
gz_headerp head;
{
- if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
- if (strm->state->wrap != 2) return Z_STREAM_ERROR;
+ if (deflateStateCheck(strm) || strm->state->wrap != 2)
+ return Z_STREAM_ERROR;
strm->state->gzhead = head;
return Z_OK;
}
@@ -484,7 +561,7 @@
int *bits;
z_streamp strm;
{
- if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ if (deflateStateCheck(strm)) return Z_STREAM_ERROR;
if (pending != Z_NULL)
*pending = strm->state->pending;
if (bits != Z_NULL)
@@ -501,7 +578,7 @@
deflate_state *s;
int put;
- if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ if (deflateStateCheck(strm)) return Z_STREAM_ERROR;
s = strm->state;
if ((Bytef *)(s->d_buf) < s->pending_out + ((Buf_size + 7) >> 3))
return Z_BUF_ERROR;
@@ -526,9 +603,8 @@
{
deflate_state *s;
compress_func func;
- int err = Z_OK;
- if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ if (deflateStateCheck(strm)) return Z_STREAM_ERROR;
s = strm->state;
#ifdef FASTEST
@@ -542,13 +618,22 @@
func = configuration_table[s->level].func;
if ((strategy != s->strategy || func != configuration_table[level].func) &&
- strm->total_in != 0) {
+ s->high_water) {
/* Flush the last buffer: */
- err = deflate(strm, Z_BLOCK);
- if (err == Z_BUF_ERROR && s->pending == 0)
- err = Z_OK;
+ int err = deflate(strm, Z_BLOCK);
+ if (err == Z_STREAM_ERROR)
+ return err;
+ if (strm->avail_out == 0)
+ return Z_BUF_ERROR;
}
if (s->level != level) {
+ if (s->level == 0 && s->matches != 0) {
+ if (s->matches == 1)
+ slide_hash(s);
+ else
+ CLEAR_HASH(s);
+ s->matches = 0;
+ }
s->level = level;
s->max_lazy_match = configuration_table[level].max_lazy;
s->good_match = configuration_table[level].good_length;
@@ -556,7 +641,7 @@
s->max_chain_length = configuration_table[level].max_chain;
}
s->strategy = strategy;
- return err;
+ return Z_OK;
}
/* ========================================================================= */
@@ -569,12 +654,12 @@
{
deflate_state *s;
- if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ if (deflateStateCheck(strm)) return Z_STREAM_ERROR;
s = strm->state;
- s->good_match = good_length;
- s->max_lazy_match = max_lazy;
+ s->good_match = (uInt)good_length;
+ s->max_lazy_match = (uInt)max_lazy;
s->nice_match = nice_length;
- s->max_chain_length = max_chain;
+ s->max_chain_length = (uInt)max_chain;
return Z_OK;
}
@@ -601,14 +686,13 @@
{
deflate_state *s;
uLong complen, wraplen;
- Bytef *str;
/* conservative upper bound for compressed data */
complen = sourceLen +
((sourceLen + 7) >> 3) + ((sourceLen + 63) >> 6) + 5;
/* if can't get parameters, return conservative bound plus zlib wrapper */
- if (strm == Z_NULL || strm->state == Z_NULL)
+ if (deflateStateCheck(strm))
return complen + 6;
/* compute wrapper length */
@@ -620,9 +704,11 @@
case 1: /* zlib wrapper */
wraplen = 6 + (s->strstart ? 4 : 0);
break;
+#ifdef GZIP
case 2: /* gzip wrapper */
wraplen = 18;
if (s->gzhead != Z_NULL) { /* user-supplied gzip header */
+ Bytef *str;
if (s->gzhead->extra != Z_NULL)
wraplen += 2 + s->gzhead->extra_len;
str = s->gzhead->name;
@@ -639,6 +725,7 @@
wraplen += 2;
}
break;
+#endif
default: /* for compiler happiness */
wraplen = 6;
}
@@ -666,10 +753,10 @@
}
/* =========================================================================
- * Flush as much pending output as possible. All deflate() output goes
- * through this function so some applications may wish to modify it
- * to avoid allocating a large strm->next_out buffer and copying into it.
- * (See also read_buf()).
+ * Flush as much pending output as possible. All deflate() output, except for
+ * some deflate_stored() output, goes through this function so some
+ * applications may wish to modify it to avoid allocating a large
+ * strm->next_out buffer and copying into it. (See also read_buf()).
*/
local void flush_pending(strm)
z_streamp strm;
@@ -686,13 +773,23 @@
strm->next_out += len;
s->pending_out += len;
strm->total_out += len;
- strm->avail_out -= len;
- s->pending -= len;
+ strm->avail_out -= len;
+ s->pending -= len;
if (s->pending == 0) {
s->pending_out = s->pending_buf;
}
}
+/* ===========================================================================
+ * Update the header CRC with the bytes s->pending_buf[beg..s->pending - 1].
+ */
+#define HCRC_UPDATE(beg) \
+ do { \
+ if (s->gzhead->hcrc && s->pending > (beg)) \
+ strm->adler = crc32(strm->adler, s->pending_buf + (beg), \
+ s->pending - (beg)); \
+ } while (0)
+
/* ========================================================================= */
int ZEXPORT deflate (strm, flush)
z_streamp strm;
@@ -701,203 +798,21 @@
int old_flush; /* value of flush param for previous deflate call */
deflate_state *s;
- if (strm == Z_NULL || strm->state == Z_NULL ||
- flush > Z_BLOCK || flush < 0) {
+ if (deflateStateCheck(strm) || flush > Z_BLOCK || flush < 0) {
return Z_STREAM_ERROR;
}
s = strm->state;
if (strm->next_out == Z_NULL ||
- (strm->next_in == Z_NULL && strm->avail_in != 0) ||
+ (strm->avail_in != 0 && strm->next_in == Z_NULL) ||
(s->status == FINISH_STATE && flush != Z_FINISH)) {
ERR_RETURN(strm, Z_STREAM_ERROR);
}
if (strm->avail_out == 0) ERR_RETURN(strm, Z_BUF_ERROR);
- s->strm = strm; /* just in case */
old_flush = s->last_flush;
s->last_flush = flush;
- /* Write the header */
- if (s->status == INIT_STATE) {
-#ifdef GZIP
- if (s->wrap == 2) {
- crc_reset(s);
- put_byte(s, 31);
- put_byte(s, 139);
- put_byte(s, 8);
- if (s->gzhead == Z_NULL) {
- put_byte(s, 0);
- put_byte(s, 0);
- put_byte(s, 0);
- put_byte(s, 0);
- put_byte(s, 0);
- put_byte(s, s->level == 9 ? 2 :
- (s->strategy >= Z_HUFFMAN_ONLY || s->level < 2 ?
- 4 : 0));
- put_byte(s, OS_CODE);
- s->status = BUSY_STATE;
- }
- else {
- put_byte(s, (s->gzhead->text ? 1 : 0) +
- (s->gzhead->hcrc ? 2 : 0) +
- (s->gzhead->extra == Z_NULL ? 0 : 4) +
- (s->gzhead->name == Z_NULL ? 0 : 8) +
- (s->gzhead->comment == Z_NULL ? 0 : 16)
- );
- put_byte(s, (Byte)(s->gzhead->time & 0xff));
- put_byte(s, (Byte)((s->gzhead->time >> 8) & 0xff));
- put_byte(s, (Byte)((s->gzhead->time >> 16) & 0xff));
- put_byte(s, (Byte)((s->gzhead->time >> 24) & 0xff));
- put_byte(s, s->level == 9 ? 2 :
- (s->strategy >= Z_HUFFMAN_ONLY || s->level < 2 ?
- 4 : 0));
- put_byte(s, s->gzhead->os & 0xff);
- if (s->gzhead->extra != Z_NULL) {
- put_byte(s, s->gzhead->extra_len & 0xff);
- put_byte(s, (s->gzhead->extra_len >> 8) & 0xff);
- }
- if (s->gzhead->hcrc)
- strm->adler = crc32(strm->adler, s->pending_buf,
- s->pending);
- s->gzindex = 0;
- s->status = EXTRA_STATE;
- }
- }
- else
-#endif
- {
- uInt header = (Z_DEFLATED + ((s->w_bits-8)<<4)) << 8;
- uInt level_flags;
-
- if (s->strategy >= Z_HUFFMAN_ONLY || s->level < 2)
- level_flags = 0;
- else if (s->level < 6)
- level_flags = 1;
- else if (s->level == 6)
- level_flags = 2;
- else
- level_flags = 3;
- header |= (level_flags << 6);
- if (s->strstart != 0) header |= PRESET_DICT;
- header += 31 - (header % 31);
-
- s->status = BUSY_STATE;
- putShortMSB(s, header);
-
- /* Save the adler32 of the preset dictionary: */
- if (s->strstart != 0) {
- putShortMSB(s, (uInt)(strm->adler >> 16));
- putShortMSB(s, (uInt)(strm->adler & 0xffff));
- }
- strm->adler = adler32(0L, Z_NULL, 0);
- }
- }
-#ifdef GZIP
- if (s->status == EXTRA_STATE) {
- if (s->gzhead->extra != Z_NULL) {
- uInt beg = s->pending; /* start of bytes to update crc */
-
- while (s->gzindex < (s->gzhead->extra_len & 0xffff)) {
- if (s->pending == s->pending_buf_size) {
- if (s->gzhead->hcrc && s->pending > beg)
- strm->adler = crc32(strm->adler, s->pending_buf + beg,
- s->pending - beg);
- flush_pending(strm);
- beg = s->pending;
- if (s->pending == s->pending_buf_size)
- break;
- }
- put_byte(s, s->gzhead->extra[s->gzindex]);
- s->gzindex++;
- }
- if (s->gzhead->hcrc && s->pending > beg)
- strm->adler = crc32(strm->adler, s->pending_buf + beg,
- s->pending - beg);
- if (s->gzindex == s->gzhead->extra_len) {
- s->gzindex = 0;
- s->status = NAME_STATE;
- }
- }
- else
- s->status = NAME_STATE;
- }
- if (s->status == NAME_STATE) {
- if (s->gzhead->name != Z_NULL) {
- uInt beg = s->pending; /* start of bytes to update crc */
- int val;
-
- do {
- if (s->pending == s->pending_buf_size) {
- if (s->gzhead->hcrc && s->pending > beg)
- strm->adler = crc32(strm->adler, s->pending_buf + beg,
- s->pending - beg);
- flush_pending(strm);
- beg = s->pending;
- if (s->pending == s->pending_buf_size) {
- val = 1;
- break;
- }
- }
- val = s->gzhead->name[s->gzindex++];
- put_byte(s, val);
- } while (val != 0);
- if (s->gzhead->hcrc && s->pending > beg)
- strm->adler = crc32(strm->adler, s->pending_buf + beg,
- s->pending - beg);
- if (val == 0) {
- s->gzindex = 0;
- s->status = COMMENT_STATE;
- }
- }
- else
- s->status = COMMENT_STATE;
- }
- if (s->status == COMMENT_STATE) {
- if (s->gzhead->comment != Z_NULL) {
- uInt beg = s->pending; /* start of bytes to update crc */
- int val;
-
- do {
- if (s->pending == s->pending_buf_size) {
- if (s->gzhead->hcrc && s->pending > beg)
- strm->adler = crc32(strm->adler, s->pending_buf + beg,
- s->pending - beg);
- flush_pending(strm);
- beg = s->pending;
- if (s->pending == s->pending_buf_size) {
- val = 1;
- break;
- }
- }
- val = s->gzhead->comment[s->gzindex++];
- put_byte(s, val);
- } while (val != 0);
- if (s->gzhead->hcrc && s->pending > beg)
- strm->adler = crc32(strm->adler, s->pending_buf + beg,
- s->pending - beg);
- if (val == 0)
- s->status = HCRC_STATE;
- }
- else
- s->status = HCRC_STATE;
- }
- if (s->status == HCRC_STATE) {
- if (s->gzhead->hcrc) {
- if (s->pending + 2 > s->pending_buf_size)
- flush_pending(strm);
- if (s->pending + 2 <= s->pending_buf_size) {
- put_byte(s, (Byte)(strm->adler & 0xff));
- put_byte(s, (Byte)((strm->adler >> 8) & 0xff));
- strm->adler = crc32(0L, Z_NULL, 0);
- s->status = BUSY_STATE;
- }
- }
- else
- s->status = BUSY_STATE;
- }
-#endif
-
/* Flush as much pending output as possible */
if (s->pending != 0) {
flush_pending(strm);
@@ -926,15 +841,197 @@
ERR_RETURN(strm, Z_BUF_ERROR);
}
+ /* Write the header */
+ if (s->status == INIT_STATE) {
+ /* zlib header */
+ uInt header = (Z_DEFLATED + ((s->w_bits-8)<<4)) << 8;
+ uInt level_flags;
+
+ if (s->strategy >= Z_HUFFMAN_ONLY || s->level < 2)
+ level_flags = 0;
+ else if (s->level < 6)
+ level_flags = 1;
+ else if (s->level == 6)
+ level_flags = 2;
+ else
+ level_flags = 3;
+ header |= (level_flags << 6);
+ if (s->strstart != 0) header |= PRESET_DICT;
+ header += 31 - (header % 31);
+
+ putShortMSB(s, header);
+
+ /* Save the adler32 of the preset dictionary: */
+ if (s->strstart != 0) {
+ putShortMSB(s, (uInt)(strm->adler >> 16));
+ putShortMSB(s, (uInt)(strm->adler & 0xffff));
+ }
+ strm->adler = adler32(0L, Z_NULL, 0);
+ s->status = BUSY_STATE;
+
+ /* Compression must start with an empty pending buffer */
+ flush_pending(strm);
+ if (s->pending != 0) {
+ s->last_flush = -1;
+ return Z_OK;
+ }
+ }
+#ifdef GZIP
+ if (s->status == GZIP_STATE) {
+ /* gzip header */
+ crc_reset(s);
+ put_byte(s, 31);
+ put_byte(s, 139);
+ put_byte(s, 8);
+ if (s->gzhead == Z_NULL) {
+ put_byte(s, 0);
+ put_byte(s, 0);
+ put_byte(s, 0);
+ put_byte(s, 0);
+ put_byte(s, 0);
+ put_byte(s, s->level == 9 ? 2 :
+ (s->strategy >= Z_HUFFMAN_ONLY || s->level < 2 ?
+ 4 : 0));
+ put_byte(s, OS_CODE);
+ s->status = BUSY_STATE;
+
+ /* Compression must start with an empty pending buffer */
+ flush_pending(strm);
+ if (s->pending != 0) {
+ s->last_flush = -1;
+ return Z_OK;
+ }
+ }
+ else {
+ put_byte(s, (s->gzhead->text ? 1 : 0) +
+ (s->gzhead->hcrc ? 2 : 0) +
+ (s->gzhead->extra == Z_NULL ? 0 : 4) +
+ (s->gzhead->name == Z_NULL ? 0 : 8) +
+ (s->gzhead->comment == Z_NULL ? 0 : 16)
+ );
+ put_byte(s, (Byte)(s->gzhead->time & 0xff));
+ put_byte(s, (Byte)((s->gzhead->time >> 8) & 0xff));
+ put_byte(s, (Byte)((s->gzhead->time >> 16) & 0xff));
+ put_byte(s, (Byte)((s->gzhead->time >> 24) & 0xff));
+ put_byte(s, s->level == 9 ? 2 :
+ (s->strategy >= Z_HUFFMAN_ONLY || s->level < 2 ?
+ 4 : 0));
+ put_byte(s, s->gzhead->os & 0xff);
+ if (s->gzhead->extra != Z_NULL) {
+ put_byte(s, s->gzhead->extra_len & 0xff);
+ put_byte(s, (s->gzhead->extra_len >> 8) & 0xff);
+ }
+ if (s->gzhead->hcrc)
+ strm->adler = crc32(strm->adler, s->pending_buf,
+ s->pending);
+ s->gzindex = 0;
+ s->status = EXTRA_STATE;
+ }
+ }
+ if (s->status == EXTRA_STATE) {
+ if (s->gzhead->extra != Z_NULL) {
+ ulg beg = s->pending; /* start of bytes to update crc */
+ uInt left = (s->gzhead->extra_len & 0xffff) - s->gzindex;
+ while (s->pending + left > s->pending_buf_size) {
+ uInt copy = s->pending_buf_size - s->pending;
+ zmemcpy(s->pending_buf + s->pending,
+ s->gzhead->extra + s->gzindex, copy);
+ s->pending = s->pending_buf_size;
+ HCRC_UPDATE(beg);
+ s->gzindex += copy;
+ flush_pending(strm);
+ if (s->pending != 0) {
+ s->last_flush = -1;
+ return Z_OK;
+ }
+ beg = 0;
+ left -= copy;
+ }
+ zmemcpy(s->pending_buf + s->pending,
+ s->gzhead->extra + s->gzindex, left);
+ s->pending += left;
+ HCRC_UPDATE(beg);
+ s->gzindex = 0;
+ }
+ s->status = NAME_STATE;
+ }
+ if (s->status == NAME_STATE) {
+ if (s->gzhead->name != Z_NULL) {
+ ulg beg = s->pending; /* start of bytes to update crc */
+ int val;
+ do {
+ if (s->pending == s->pending_buf_size) {
+ HCRC_UPDATE(beg);
+ flush_pending(strm);
+ if (s->pending != 0) {
+ s->last_flush = -1;
+ return Z_OK;
+ }
+ beg = 0;
+ }
+ val = s->gzhead->name[s->gzindex++];
+ put_byte(s, val);
+ } while (val != 0);
+ HCRC_UPDATE(beg);
+ s->gzindex = 0;
+ }
+ s->status = COMMENT_STATE;
+ }
+ if (s->status == COMMENT_STATE) {
+ if (s->gzhead->comment != Z_NULL) {
+ ulg beg = s->pending; /* start of bytes to update crc */
+ int val;
+ do {
+ if (s->pending == s->pending_buf_size) {
+ HCRC_UPDATE(beg);
+ flush_pending(strm);
+ if (s->pending != 0) {
+ s->last_flush = -1;
+ return Z_OK;
+ }
+ beg = 0;
+ }
+ val = s->gzhead->comment[s->gzindex++];
+ put_byte(s, val);
+ } while (val != 0);
+ HCRC_UPDATE(beg);
+ }
+ s->status = HCRC_STATE;
+ }
+ if (s->status == HCRC_STATE) {
+ if (s->gzhead->hcrc) {
+ if (s->pending + 2 > s->pending_buf_size) {
+ flush_pending(strm);
+ if (s->pending != 0) {
+ s->last_flush = -1;
+ return Z_OK;
+ }
+ }
+ put_byte(s, (Byte)(strm->adler & 0xff));
+ put_byte(s, (Byte)((strm->adler >> 8) & 0xff));
+ strm->adler = crc32(0L, Z_NULL, 0);
+ }
+ s->status = BUSY_STATE;
+
+ /* Compression must start with an empty pending buffer */
+ flush_pending(strm);
+ if (s->pending != 0) {
+ s->last_flush = -1;
+ return Z_OK;
+ }
+ }
+#endif
+
/* Start a new block or continue the current one.
*/
if (strm->avail_in != 0 || s->lookahead != 0 ||
(flush != Z_NO_FLUSH && s->status != FINISH_STATE)) {
block_state bstate;
- bstate = s->strategy == Z_HUFFMAN_ONLY ? deflate_huff(s, flush) :
- (s->strategy == Z_RLE ? deflate_rle(s, flush) :
- (*(configuration_table[s->level].func))(s, flush));
+ bstate = s->level == 0 ? deflate_stored(s, flush) :
+ s->strategy == Z_HUFFMAN_ONLY ? deflate_huff(s, flush) :
+ s->strategy == Z_RLE ? deflate_rle(s, flush) :
+ (*(configuration_table[s->level].func))(s, flush);
if (bstate == finish_started || bstate == finish_done) {
s->status = FINISH_STATE;
@@ -976,7 +1073,6 @@
}
}
}
- Assert(strm->avail_out > 0, "bug2");
if (flush != Z_FINISH) return Z_OK;
if (s->wrap <= 0) return Z_STREAM_END;
@@ -1014,18 +1110,9 @@
{
int status;
- if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ if (deflateStateCheck(strm)) return Z_STREAM_ERROR;
status = strm->state->status;
- if (status != INIT_STATE &&
- status != EXTRA_STATE &&
- status != NAME_STATE &&
- status != COMMENT_STATE &&
- status != HCRC_STATE &&
- status != BUSY_STATE &&
- status != FINISH_STATE) {
- return Z_STREAM_ERROR;
- }
/* Deallocate in reverse order of allocations: */
TRY_FREE(strm, strm->state->pending_buf);
@@ -1056,7 +1143,7 @@
ushf *overlay;
- if (source == Z_NULL || dest == Z_NULL || source->state == Z_NULL) {
+ if (deflateStateCheck(source) || dest == Z_NULL) {
return Z_STREAM_ERROR;
}
@@ -1106,7 +1193,7 @@
* allocating a large strm->next_in buffer and copying from it.
* (See also flush_pending()).
*/
-ZLIB_INTERNAL int read_buf(strm, buf, size)
+ZLIB_INTERNAL unsigned read_buf(strm, buf, size)
z_streamp strm;
Bytef *buf;
unsigned size;
@@ -1131,7 +1218,7 @@
strm->next_in += len;
strm->total_in += len;
- return (int)len;
+ return len;
}
/* ===========================================================================
@@ -1185,9 +1272,9 @@
{
unsigned chain_length = s->max_chain_length;/* max hash chain length */
register Bytef *scan = s->window + s->strstart; /* current string */
- register Bytef *match; /* matched string */
+ register Bytef *match; /* matched string */
register int len; /* length of current match */
- int best_len = s->prev_length; /* best match length so far */
+ int best_len = (int)s->prev_length; /* best match length so far */
int nice_match = s->nice_match; /* stop if match long enough */
IPos limit = s->strstart > (IPos)MAX_DIST(s) ?
s->strstart - (IPos)MAX_DIST(s) : NIL;
@@ -1222,7 +1309,7 @@
/* Do not look for matches beyond the end of the input. This is necessary
* to make deflate deterministic.
*/
- if ((uInt)nice_match > s->lookahead) nice_match = s->lookahead;
+ if ((uInt)nice_match > s->lookahead) nice_match = (int)s->lookahead;
Assert((ulg)s->strstart <= s->window_size-MIN_LOOKAHEAD, "need lookahead");
@@ -1383,7 +1470,11 @@
#endif /* FASTEST */
-#ifdef DEBUG
+#ifdef ZLIB_DEBUG
+
+#define EQUAL 0
+/* result of memcmp for equal strings */
+
/* ===========================================================================
* Check that the match at match_start is indeed a match.
*/
@@ -1409,7 +1500,7 @@
}
#else
# define check_match(s, start, match, length)
-#endif /* DEBUG */
+#endif /* ZLIB_DEBUG */
/* ===========================================================================
* Fill the window when the lookahead becomes insufficient.
@@ -1436,8 +1527,7 @@
local void fill_window_c(s)
deflate_state *s;
{
- register unsigned n, m;
- register Posf *p;
+ unsigned n;
unsigned more; /* Amount of free space at the end of the window. */
uInt wsize = s->w_size;
@@ -1464,35 +1554,11 @@
*/
if (s->strstart >= wsize+MAX_DIST(s)) {
- zmemcpy(s->window, s->window+wsize, (unsigned)wsize);
+ zmemcpy(s->window, s->window+wsize, (unsigned)wsize - more);
s->match_start -= wsize;
s->strstart -= wsize; /* we now have strstart >= MAX_DIST */
s->block_start -= (long) wsize;
-
- /* Slide the hash table (could be avoided with 32 bit values
- at the expense of memory usage). We slide even when level == 0
- to keep the hash table consistent if we switch back to level > 0
- later. (Using level 0 permanently is not an optimal usage of
- zlib, so we don't care about this pathological case.)
- */
- n = s->hash_size;
- p = &s->head[n];
- do {
- m = *--p;
- *p = (Pos)(m >= wsize ? m-wsize : NIL);
- } while (--n);
-
- n = wsize;
-#ifndef FASTEST
- p = &s->prev[n];
- do {
- m = *--p;
- *p = (Pos)(m >= wsize ? m-wsize : NIL);
- /* If n is not on any hash chain, prev[n] is garbage but
- * its value will never be used.
- */
- } while (--n);
-#endif
+ slide_hash(s);
more += wsize;
}
if (s->strm->avail_in == 0) break;
@@ -1598,70 +1664,199 @@
if (s->strm->avail_out == 0) return (last) ? finish_started : need_more; \
}
+/* Maximum stored block length in deflate format (not including header). */
+#define MAX_STORED 65535
+
+/* Minimum of a and b. */
+#define MIN(a, b) ((a) > (b) ? (b) : (a))
+
/* ===========================================================================
* Copy without compression as much as possible from the input stream, return
* the current block state.
- * This function does not insert new strings in the dictionary since
- * uncompressible data is probably not useful. This function is used
- * only for the level=0 compression option.
- * NOTE: this function should be optimized to avoid extra copying from
- * window to pending_buf.
+ *
+ * In case deflateParams() is used to later switch to a non-zero compression
+ * level, s->matches (otherwise unused when storing) keeps track of the number
+ * of hash table slides to perform. If s->matches is 1, then one hash table
+ * slide will be done when switching. If s->matches is 2, the maximum value
+ * allowed here, then the hash table will be cleared, since two or more slides
+ * is the same as a clear.
+ *
+ * deflate_stored() is written to minimize the number of times an input byte is
+ * copied. It is most efficient with large input and output buffers, which
+ * maximizes the opportunites to have a single copy from next_in to next_out.
*/
local block_state deflate_stored(s, flush)
deflate_state *s;
int flush;
{
- /* Stored blocks are limited to 0xffff bytes, pending_buf is limited
- * to pending_buf_size, and each stored block has a 5 byte header:
+ /* Smallest worthy block size when not flushing or finishing. By default
+ * this is 32K. This can be as small as 507 bytes for memLevel == 1. For
+ * large input and output buffers, the stored block size will be larger.
*/
- ulg max_block_size = 0xffff;
- ulg max_start;
+ unsigned min_block = MIN(s->pending_buf_size - 5, s->w_size);
- if (max_block_size > s->pending_buf_size - 5) {
- max_block_size = s->pending_buf_size - 5;
- }
-
- /* Copy as much as possible from input to output: */
- for (;;) {
- /* Fill the window as much as possible: */
- if (s->lookahead <= 1) {
-
- Assert(s->strstart < s->w_size+MAX_DIST(s) ||
- s->block_start >= (long)s->w_size, "slide too late");
-
- fill_window(s);
- if (s->lookahead == 0 && flush == Z_NO_FLUSH) return need_more;
-
- if (s->lookahead == 0) break; /* flush the current block */
- }
- Assert(s->block_start >= 0L, "block gone");
-
- s->strstart += s->lookahead;
- s->lookahead = 0;
-
- /* Emit a stored block if pending_buf will be full: */
- max_start = s->block_start + max_block_size;
- if (s->strstart == 0 || (ulg)s->strstart >= max_start) {
- /* strstart == 0 is possible when wraparound on 16-bit machine */
- s->lookahead = (uInt)(s->strstart - max_start);
- s->strstart = (uInt)max_start;
- FLUSH_BLOCK(s, 0);
- }
- /* Flush if we may have to slide, otherwise block_start may become
- * negative and the data will be gone:
+ /* Copy as many min_block or larger stored blocks directly to next_out as
+ * possible. If flushing, copy the remaining available input to next_out as
+ * stored blocks, if there is enough space.
+ */
+ unsigned len, left, have, last = 0;
+ unsigned used = s->strm->avail_in;
+ do {
+ /* Set len to the maximum size block that we can copy directly with the
+ * available input data and output space. Set left to how much of that
+ * would be copied from what's left in the window.
*/
- if (s->strstart - (uInt)s->block_start >= MAX_DIST(s)) {
- FLUSH_BLOCK(s, 0);
+ len = MAX_STORED; /* maximum deflate stored block length */
+ have = (s->bi_valid + 42) >> 3; /* number of header bytes */
+ if (s->strm->avail_out < have) /* need room for header */
+ break;
+ /* maximum stored block length that will fit in avail_out: */
+ have = s->strm->avail_out - have;
+ left = s->strstart - s->block_start; /* bytes left in window */
+ if (len > (ulg)left + s->strm->avail_in)
+ len = left + s->strm->avail_in; /* limit len to the input */
+ if (len > have)
+ len = have; /* limit len to the output */
+
+ /* If the stored block would be less than min_block in length, or if
+ * unable to copy all of the available input when flushing, then try
+ * copying to the window and the pending buffer instead. Also don't
+ * write an empty block when flushing -- deflate() does that.
+ */
+ if (len < min_block && ((len == 0 && flush != Z_FINISH) ||
+ flush == Z_NO_FLUSH ||
+ len != left + s->strm->avail_in))
+ break;
+
+ /* Make a dummy stored block in pending to get the header bytes,
+ * including any pending bits. This also updates the debugging counts.
+ */
+ last = flush == Z_FINISH && len == left + s->strm->avail_in ? 1 : 0;
+ _tr_stored_block(s, (char *)0, 0L, last);
+
+ /* Replace the lengths in the dummy stored block with len. */
+ s->pending_buf[s->pending - 4] = len;
+ s->pending_buf[s->pending - 3] = len >> 8;
+ s->pending_buf[s->pending - 2] = ~len;
+ s->pending_buf[s->pending - 1] = ~len >> 8;
+
+ /* Write the stored block header bytes. */
+ flush_pending(s->strm);
+
+#ifdef ZLIB_DEBUG
+ /* Update debugging counts for the data about to be copied. */
+ s->compressed_len += len << 3;
+ s->bits_sent += len << 3;
+#endif
+
+ /* Copy uncompressed bytes from the window to next_out. */
+ if (left) {
+ if (left > len)
+ left = len;
+ zmemcpy(s->strm->next_out, s->window + s->block_start, left);
+ s->strm->next_out += left;
+ s->strm->avail_out -= left;
+ s->strm->total_out += left;
+ s->block_start += left;
+ len -= left;
}
+
+ /* Copy uncompressed bytes directly from next_in to next_out, updating
+ * the check value.
+ */
+ if (len) {
+ read_buf(s->strm, s->strm->next_out, len);
+ s->strm->next_out += len;
+ s->strm->avail_out -= len;
+ s->strm->total_out += len;
+ }
+ } while (last == 0);
+
+ /* Update the sliding window with the last s->w_size bytes of the copied
+ * data, or append all of the copied data to the existing window if less
+ * than s->w_size bytes were copied. Also update the number of bytes to
+ * insert in the hash tables, in the event that deflateParams() switches to
+ * a non-zero compression level.
+ */
+ used -= s->strm->avail_in; /* number of input bytes directly copied */
+ if (used) {
+ /* If any input was used, then no unused input remains in the window,
+ * therefore s->block_start == s->strstart.
+ */
+ if (used >= s->w_size) { /* supplant the previous history */
+ s->matches = 2; /* clear hash */
+ zmemcpy(s->window, s->strm->next_in - s->w_size, s->w_size);
+ s->strstart = s->w_size;
+ }
+ else {
+ if (s->window_size - s->strstart <= used) {
+ /* Slide the window down. */
+ s->strstart -= s->w_size;
+ zmemcpy(s->window, s->window + s->w_size, s->strstart);
+ if (s->matches < 2)
+ s->matches++; /* add a pending slide_hash() */
+ }
+ zmemcpy(s->window + s->strstart, s->strm->next_in - used, used);
+ s->strstart += used;
+ }
+ s->block_start = s->strstart;
+ s->insert += MIN(used, s->w_size - s->insert);
}
- s->insert = 0;
- if (flush == Z_FINISH) {
- FLUSH_BLOCK(s, 1);
+ if (s->high_water < s->strstart)
+ s->high_water = s->strstart;
+
+ /* If the last block was written to next_out, then done. */
+ if (last)
return finish_done;
+
+ /* If flushing and all input has been consumed, then done. */
+ if (flush != Z_NO_FLUSH && flush != Z_FINISH &&
+ s->strm->avail_in == 0 && (long)s->strstart == s->block_start)
+ return block_done;
+
+ /* Fill the window with any remaining input. */
+ have = s->window_size - s->strstart - 1;
+ if (s->strm->avail_in > have && s->block_start >= (long)s->w_size) {
+ /* Slide the window down. */
+ s->block_start -= s->w_size;
+ s->strstart -= s->w_size;
+ zmemcpy(s->window, s->window + s->w_size, s->strstart);
+ if (s->matches < 2)
+ s->matches++; /* add a pending slide_hash() */
+ have += s->w_size; /* more space now */
}
- if ((long)s->strstart > s->block_start)
- FLUSH_BLOCK(s, 0);
- return block_done;
+ if (have > s->strm->avail_in)
+ have = s->strm->avail_in;
+ if (have) {
+ read_buf(s->strm, s->window + s->strstart, have);
+ s->strstart += have;
+ }
+ if (s->high_water < s->strstart)
+ s->high_water = s->strstart;
+
+ /* There was not enough avail_out to write a complete worthy or flushed
+ * stored block to next_out. Write a stored block to pending instead, if we
+ * have enough input for a worthy block, or if flushing and there is enough
+ * room for the remaining input as a stored block in the pending buffer.
+ */
+ have = (s->bi_valid + 42) >> 3; /* number of header bytes */
+ /* maximum stored block length that will fit in pending: */
+ have = MIN(s->pending_buf_size - have, MAX_STORED);
+ min_block = MIN(have, s->w_size);
+ left = s->strstart - s->block_start;
+ if (left >= min_block ||
+ ((left || flush == Z_FINISH) && flush != Z_NO_FLUSH &&
+ s->strm->avail_in == 0 && left <= have)) {
+ len = MIN(left, have);
+ last = flush == Z_FINISH && s->strm->avail_in == 0 &&
+ len == left ? 1 : 0;
+ _tr_stored_block(s, (charf *)s->window + s->block_start, len, last);
+ s->block_start += len;
+ flush_pending(s->strm);
+ }
+
+ /* We've done all we can with the available input and output. */
+ return last ? finish_started : need_more;
}
/* ===========================================================================
@@ -1938,7 +2133,7 @@
prev == *++scan && prev == *++scan &&
prev == *++scan && prev == *++scan &&
scan < strend);
- s->match_length = MAX_MATCH - (int)(strend - scan);
+ s->match_length = MAX_MATCH - (uInt)(strend - scan);
if (s->match_length > s->lookahead)
s->match_length = s->lookahead;
}
diff --git a/deflate.h b/deflate.h
index 022d9c3..ab56df7 100644
--- a/deflate.h
+++ b/deflate.h
@@ -1,5 +1,5 @@
/* deflate.h -- internal compression state
- * Copyright (C) 1995-2012 Jean-loup Gailly
+ * Copyright (C) 1995-2016 Jean-loup Gailly
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@@ -51,13 +51,16 @@
#define Buf_size 16
/* size of bit buffer in bi_buf */
-#define INIT_STATE 42
-#define EXTRA_STATE 69
-#define NAME_STATE 73
-#define COMMENT_STATE 91
-#define HCRC_STATE 103
-#define BUSY_STATE 113
-#define FINISH_STATE 666
+#define INIT_STATE 42 /* zlib header -> BUSY_STATE */
+#ifdef GZIP
+# define GZIP_STATE 57 /* gzip header -> BUSY_STATE | EXTRA_STATE */
+#endif
+#define EXTRA_STATE 69 /* gzip extra block -> NAME_STATE */
+#define NAME_STATE 73 /* gzip file name -> COMMENT_STATE */
+#define COMMENT_STATE 91 /* gzip comment -> HCRC_STATE */
+#define HCRC_STATE 103 /* gzip header CRC -> BUSY_STATE */
+#define BUSY_STATE 113 /* deflate -> FINISH_STATE */
+#define FINISH_STATE 666 /* stream complete */
/* Stream status */
@@ -83,7 +86,7 @@
typedef struct tree_desc_s {
ct_data *dyn_tree; /* the dynamic tree */
int max_code; /* largest code with non zero frequency */
- static_tree_desc *stat_desc; /* the corresponding static tree */
+ const static_tree_desc *stat_desc; /* the corresponding static tree */
} FAR tree_desc;
typedef ush Pos;
@@ -100,10 +103,10 @@
Bytef *pending_buf; /* output still pending */
ulg pending_buf_size; /* size of pending_buf */
Bytef *pending_out; /* next pending byte to output to the stream */
- uInt pending; /* nb of bytes in the pending buffer */
+ ulg pending; /* nb of bytes in the pending buffer */
int wrap; /* bit 0 true for zlib, bit 1 true for gzip */
gz_headerp gzhead; /* gzip header information to write */
- uInt gzindex; /* where in extra, name, or comment */
+ ulg gzindex; /* where in extra, name, or comment */
Byte method; /* can only be DEFLATED */
int last_flush; /* value of flush param for previous deflate call */
unsigned zalign(16) crc0[4 * 5];
@@ -249,7 +252,7 @@
uInt matches; /* number of string matches in current block */
uInt insert; /* bytes at end of window left to insert */
-#ifdef DEBUG
+#ifdef ZLIB_DEBUG
ulg compressed_len; /* total bit length of compressed file mod 2^32 */
ulg bits_sent; /* bit length of compressed data sent mod 2^32 */
#endif
@@ -275,7 +278,7 @@
/* Output a byte on the stream.
* IN assertion: there is enough room in pending_buf.
*/
-#define put_byte(s, c) {s->pending_buf[s->pending++] = (c);}
+#define put_byte(s, c) {s->pending_buf[s->pending++] = (Bytef)(c);}
#define MIN_LOOKAHEAD (MAX_MATCH+MIN_MATCH+1)
@@ -309,7 +312,7 @@
* used.
*/
-#ifndef DEBUG
+#ifndef ZLIB_DEBUG
/* Inline versions of _tr_tally for speed: */
#if defined(GEN_TREES_H) || !defined(STDC)
@@ -328,8 +331,8 @@
flush = (s->last_lit == s->lit_bufsize-1); \
}
# define _tr_tally_dist(s, distance, length, flush) \
- { uch len = (length); \
- ush dist = (distance); \
+ { uch len = (uch)(length); \
+ ush dist = (ush)(distance); \
s->d_buf[s->last_lit] = dist; \
s->l_buf[s->last_lit++] = len; \
dist--; \
diff --git a/google.patch b/google.patch
index ee00399..f16dacc 100644
--- a/google.patch
+++ b/google.patch
@@ -1,7 +1,7 @@
-diff --git a/third_party/zlib/contrib/minizip/ioapi.h b/third_party/zlib/contrib/minizip/ioapi.h
-index 8dcbdb0..c1b7a54 100644
---- a/third_party/zlib/contrib/minizip/ioapi.h
-+++ b/third_party/zlib/contrib/minizip/ioapi.h
+diff --git a/contrib/minizip/ioapi.h b/contrib/minizip/ioapi.h
+index 8dcbdb06e35a..c1b7a54847f5 100644
+--- a/contrib/minizip/ioapi.h
++++ b/contrib/minizip/ioapi.h
@@ -43,7 +43,7 @@
#include <stdio.h>
@@ -11,10 +11,34 @@
#if defined(USE_FILE32API)
#define fopen64 fopen
-diff --git a/third_party/zlib/contrib/minizip/mztools.c b/third_party/zlib/contrib/minizip/mztools.c
-index 96891c2..8bf9cca 100644
---- a/third_party/zlib/contrib/minizip/mztools.c
-+++ b/third_party/zlib/contrib/minizip/mztools.c
+diff --git a/contrib/minizip/iowin32.c b/contrib/minizip/iowin32.c
+index 274f39eb1dd2..246ceb91a139 100644
+--- a/contrib/minizip/iowin32.c
++++ b/contrib/minizip/iowin32.c
+@@ -26,12 +26,19 @@
+ #endif
+
+
++#ifdef _WIN32_WINNT
++#undef _WIN32_WINNT
++#define _WIN32_WINNT 0x601
++#endif
++
++#if _WIN32_WINNT >= _WIN32_WINNT_WIN8
+ // see Include/shared/winapifamily.h in the Windows Kit
+ #if defined(WINAPI_FAMILY_PARTITION) && (!(defined(IOWIN32_USING_WINRT_API)))
+ #if WINAPI_FAMILY_ONE_PARTITION(WINAPI_FAMILY, WINAPI_PARTITION_APP)
+ #define IOWIN32_USING_WINRT_API 1
+ #endif
+ #endif
++#endif
+
+ voidpf ZCALLBACK win32_open_file_func OF((voidpf opaque, const char* filename, int mode));
+ uLong ZCALLBACK win32_read_file_func OF((voidpf opaque, voidpf stream, void* buf, uLong size));
+diff --git a/contrib/minizip/mztools.c b/contrib/minizip/mztools.c
+index 96891c2e0b71..8bf9cca32633 100644
+--- a/contrib/minizip/mztools.c
++++ b/contrib/minizip/mztools.c
@@ -8,7 +8,7 @@
#include <stdio.h>
#include <stdlib.h>
@@ -24,10 +48,10 @@
#include "unzip.h"
#define READ_8(adr) ((unsigned char)*(adr))
-diff --git a/third_party/zlib/contrib/minizip/mztools.h b/third_party/zlib/contrib/minizip/mztools.h
-index a49a426..f295ffe 100644
---- a/third_party/zlib/contrib/minizip/mztools.h
-+++ b/third_party/zlib/contrib/minizip/mztools.h
+diff --git a/contrib/minizip/mztools.h b/contrib/minizip/mztools.h
+index a49a426ec2fc..f295ffeda6af 100644
+--- a/contrib/minizip/mztools.h
++++ b/contrib/minizip/mztools.h
@@ -12,7 +12,7 @@ extern "C" {
#endif
@@ -37,10 +61,10 @@
#endif
#include "unzip.h"
-diff --git a/third_party/zlib/contrib/minizip/unzip.c b/third_party/zlib/contrib/minizip/unzip.c
-index 9093504..2d5f0b1 100644
---- a/third_party/zlib/contrib/minizip/unzip.c
-+++ b/third_party/zlib/contrib/minizip/unzip.c
+diff --git a/contrib/minizip/unzip.c b/contrib/minizip/unzip.c
+index bcfb9416ec35..199b4723fcfc 100644
+--- a/contrib/minizip/unzip.c
++++ b/contrib/minizip/unzip.c
@@ -72,7 +72,7 @@
#define NOUNCRYPT
#endif
@@ -62,10 +86,10 @@
if ((len>pfile_in_zip_read_info->rest_read_compressed+
pfile_in_zip_read_info->stream.avail_in) &&
(pfile_in_zip_read_info->raw))
-diff --git a/third_party/zlib/contrib/minizip/unzip.h b/third_party/zlib/contrib/minizip/unzip.h
-index 2104e39..3c01435 100644
---- a/third_party/zlib/contrib/minizip/unzip.h
-+++ b/third_party/zlib/contrib/minizip/unzip.h
+diff --git a/contrib/minizip/unzip.h b/contrib/minizip/unzip.h
+index 2104e3915074..3c0143529b91 100644
+--- a/contrib/minizip/unzip.h
++++ b/contrib/minizip/unzip.h
@@ -48,7 +48,7 @@ extern "C" {
#endif
@@ -75,10 +99,10 @@
#endif
#ifndef _ZLIBIOAPI_H
-diff --git a/third_party/zlib/contrib/minizip/zip.c b/third_party/zlib/contrib/minizip/zip.c
-index ea54853..aaf6961 100644
---- a/third_party/zlib/contrib/minizip/zip.c
-+++ b/third_party/zlib/contrib/minizip/zip.c
+diff --git a/contrib/minizip/zip.c b/contrib/minizip/zip.c
+index 44e88a9cb989..65c0c7251843 100644
+--- a/contrib/minizip/zip.c
++++ b/contrib/minizip/zip.c
@@ -26,7 +26,7 @@
#include <stdlib.h>
#include <string.h>
@@ -88,10 +112,10 @@
#include "zip.h"
#ifdef STDC
-diff --git a/third_party/zlib/contrib/minizip/zip.h b/third_party/zlib/contrib/minizip/zip.h
-index 8aaebb6..8c06c0a 100644
---- a/third_party/zlib/contrib/minizip/zip.h
-+++ b/third_party/zlib/contrib/minizip/zip.h
+diff --git a/contrib/minizip/zip.h b/contrib/minizip/zip.h
+index 8aaebb623430..8c06c0aa7bb0 100644
+--- a/contrib/minizip/zip.h
++++ b/contrib/minizip/zip.h
@@ -47,7 +47,7 @@ extern "C" {
//#define HAVE_BZIP2
@@ -101,221 +125,198 @@
#endif
#ifndef _ZLIBIOAPI_H
-diff --git a/third_party/zlib/gzread.c b/third_party/zlib/gzread.c
-index bf4538e..4e11246 100644
---- a/third_party/zlib/gzread.c
-+++ b/third_party/zlib/gzread.c
-@@ -383,7 +383,11 @@ int ZEXPORT gzread(file, buf, len)
+diff --git a/gzread.c b/gzread.c
+index 956b91ea7d9e..832d3ef98c59 100644
+--- a/gzread.c
++++ b/gzread.c
+@@ -443,7 +443,11 @@ z_size_t ZEXPORT gzfread(buf, size, nitems, file)
# undef z_gzgetc
#else
# undef gzgetc
-+# ifdef MOZZCONF_H
-+# define gzgetc MOZ_Z_gzgetc
++# ifdef Z_CR_PREFIX_SET
++# define gzgetc Cr_z_gzgetc
+# endif
#endif
+
int ZEXPORT gzgetc(file)
gzFile file;
{
-diff --git a/third_party/zlib/mozzconf.h b/third_party/zlib/mozzconf.h
+diff --git a/names.h b/names.h
new file mode 100644
-index 0000000..80994c9
+index 000000000000..f18df5684dc5
--- /dev/null
-+++ b/third_party/zlib/mozzconf.h
-@@ -0,0 +1,178 @@
-+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-+/* ***** BEGIN LICENSE BLOCK *****
-+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
++++ b/names.h
+@@ -0,0 +1,155 @@
++/* Copyright 2017 The Chromium Authors. All rights reserved.
++ * Use of this source code is governed by a BSD-style license that can be
++ * found in the LICENSE file. */
++
++#ifndef THIRD_PARTY_ZLIB_NAMES_H_
++#define THIRD_PARTY_ZLIB_NAMES_H_
++
++/* Rename all zlib names with a Cr_z_ prefix. This is based on the Z_PREFIX
++ * option from zconf.h, but with a custom prefix. Where zconf.h would rename
++ * both a macro and its underscore-suffixed internal implementation (such as
++ * deflateInit2 and deflateInit2_), only the implementation is renamed here.
++ * The Byte type is also omitted.
+ *
-+ * The contents of this file are subject to the Mozilla Public License Version
-+ * 1.1 (the "License"); you may not use this file except in compliance with
-+ * the License. You may obtain a copy of the License at
-+ * http://www.mozilla.org/MPL/
++ * To generate this list, run
++ * sed -rn -e 's/^# *define +([^ ]+) +(z_[^ ]+)$/#define \1 Cr_\2/p' zconf.h
++ * (use -E instead of -r on macOS).
+ *
-+ * Software distributed under the License is distributed on an "AS IS" basis,
-+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
-+ * for the specific language governing rights and limitations under the
-+ * License.
-+ *
-+ * The Original Code is the mozilla zlib configuration.
-+ *
-+ * The Initial Developer of the Original Code is IBM Corporation.
-+ * Portions created by the Initial Developer are Copyright (C) 2004
-+ * the Initial Developer. All Rights Reserved.
-+ *
-+ * Contributor(s):
-+ *
-+ * Alternatively, the contents of this file may be used under the terms of
-+ * either of the GNU General Public License Version 2 or later (the "GPL"),
-+ * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
-+ * in which case the provisions of the GPL or the LGPL are applicable instead
-+ * of those above. If you wish to allow use of your version of this file only
-+ * under the terms of either the GPL or the LGPL, and not to allow others to
-+ * use your version of this file under the terms of the MPL, indicate your
-+ * decision by deleting the provisions above and replace them with the notice
-+ * and other provisions required by the GPL or the LGPL. If you do not delete
-+ * the provisions above, a recipient may use your version of this file under
-+ * the terms of any one of the MPL, the GPL or the LGPL.
-+ *
-+ * ***** END LICENSE BLOCK ***** */
++ * gzread is also addressed by modifications in gzread.c and zlib.h. */
+
-+#ifndef MOZZCONF_H
-+#define MOZZCONF_H
++#define Z_CR_PREFIX_SET
+
-+#if defined(XP_WIN) && defined(ZLIB_DLL) && !defined(MOZ_ENABLE_LIBXUL)
-+#undef ZLIB_DLL
-+#endif
++#define _dist_code Cr_z__dist_code
++#define _length_code Cr_z__length_code
++#define _tr_align Cr_z__tr_align
++#define _tr_flush_bits Cr_z__tr_flush_bits
++#define _tr_flush_block Cr_z__tr_flush_block
++#define _tr_init Cr_z__tr_init
++#define _tr_stored_block Cr_z__tr_stored_block
++#define _tr_tally Cr_z__tr_tally
++#define adler32 Cr_z_adler32
++#define adler32_combine Cr_z_adler32_combine
++#define adler32_combine64 Cr_z_adler32_combine64
++#define adler32_z Cr_z_adler32_z
++#define compress Cr_z_compress
++#define compress2 Cr_z_compress2
++#define compressBound Cr_z_compressBound
++#define crc32 Cr_z_crc32
++#define crc32_combine Cr_z_crc32_combine
++#define crc32_combine64 Cr_z_crc32_combine64
++#define crc32_z Cr_z_crc32_z
++#define deflate Cr_z_deflate
++#define deflateBound Cr_z_deflateBound
++#define deflateCopy Cr_z_deflateCopy
++#define deflateEnd Cr_z_deflateEnd
++#define deflateGetDictionary Cr_z_deflateGetDictionary
++/* #undef deflateInit */
++/* #undef deflateInit2 */
++#define deflateInit2_ Cr_z_deflateInit2_
++#define deflateInit_ Cr_z_deflateInit_
++#define deflateParams Cr_z_deflateParams
++#define deflatePending Cr_z_deflatePending
++#define deflatePrime Cr_z_deflatePrime
++#define deflateReset Cr_z_deflateReset
++#define deflateResetKeep Cr_z_deflateResetKeep
++#define deflateSetDictionary Cr_z_deflateSetDictionary
++#define deflateSetHeader Cr_z_deflateSetHeader
++#define deflateTune Cr_z_deflateTune
++#define deflate_copyright Cr_z_deflate_copyright
++#define get_crc_table Cr_z_get_crc_table
++#define gz_error Cr_z_gz_error
++#define gz_intmax Cr_z_gz_intmax
++#define gz_strwinerror Cr_z_gz_strwinerror
++#define gzbuffer Cr_z_gzbuffer
++#define gzclearerr Cr_z_gzclearerr
++#define gzclose Cr_z_gzclose
++#define gzclose_r Cr_z_gzclose_r
++#define gzclose_w Cr_z_gzclose_w
++#define gzdirect Cr_z_gzdirect
++#define gzdopen Cr_z_gzdopen
++#define gzeof Cr_z_gzeof
++#define gzerror Cr_z_gzerror
++#define gzflush Cr_z_gzflush
++#define gzfread Cr_z_gzfread
++#define gzfwrite Cr_z_gzfwrite
++#define gzgetc Cr_z_gzgetc
++#define gzgetc_ Cr_z_gzgetc_
++#define gzgets Cr_z_gzgets
++#define gzoffset Cr_z_gzoffset
++#define gzoffset64 Cr_z_gzoffset64
++#define gzopen Cr_z_gzopen
++#define gzopen64 Cr_z_gzopen64
++#define gzopen_w Cr_z_gzopen_w
++#define gzprintf Cr_z_gzprintf
++#define gzputc Cr_z_gzputc
++#define gzputs Cr_z_gzputs
++#define gzread Cr_z_gzread
++#define gzrewind Cr_z_gzrewind
++#define gzseek Cr_z_gzseek
++#define gzseek64 Cr_z_gzseek64
++#define gzsetparams Cr_z_gzsetparams
++#define gztell Cr_z_gztell
++#define gztell64 Cr_z_gztell64
++#define gzungetc Cr_z_gzungetc
++#define gzvprintf Cr_z_gzvprintf
++#define gzwrite Cr_z_gzwrite
++#define inflate Cr_z_inflate
++#define inflateBack Cr_z_inflateBack
++#define inflateBackEnd Cr_z_inflateBackEnd
++/* #undef inflateBackInit */
++#define inflateBackInit_ Cr_z_inflateBackInit_
++#define inflateCodesUsed Cr_z_inflateCodesUsed
++#define inflateCopy Cr_z_inflateCopy
++#define inflateEnd Cr_z_inflateEnd
++#define inflateGetDictionary Cr_z_inflateGetDictionary
++#define inflateGetHeader Cr_z_inflateGetHeader
++/* #undef inflateInit */
++/* #undef inflateInit2 */
++#define inflateInit2_ Cr_z_inflateInit2_
++#define inflateInit_ Cr_z_inflateInit_
++#define inflateMark Cr_z_inflateMark
++#define inflatePrime Cr_z_inflatePrime
++#define inflateReset Cr_z_inflateReset
++#define inflateReset2 Cr_z_inflateReset2
++#define inflateResetKeep Cr_z_inflateResetKeep
++#define inflateSetDictionary Cr_z_inflateSetDictionary
++#define inflateSync Cr_z_inflateSync
++#define inflateSyncPoint Cr_z_inflateSyncPoint
++#define inflateUndermine Cr_z_inflateUndermine
++#define inflateValidate Cr_z_inflateValidate
++#define inflate_copyright Cr_z_inflate_copyright
++#define inflate_fast Cr_z_inflate_fast
++#define inflate_table Cr_z_inflate_table
++#define uncompress Cr_z_uncompress
++#define uncompress2 Cr_z_uncompress2
++#define zError Cr_z_zError
++#define zcalloc Cr_z_zcalloc
++#define zcfree Cr_z_zcfree
++#define zlibCompileFlags Cr_z_zlibCompileFlags
++#define zlibVersion Cr_z_zlibVersion
++/* #undef Byte */
++#define Bytef Cr_z_Bytef
++#define alloc_func Cr_z_alloc_func
++#define charf Cr_z_charf
++#define free_func Cr_z_free_func
++#define gzFile Cr_z_gzFile
++#define gz_header Cr_z_gz_header
++#define gz_headerp Cr_z_gz_headerp
++#define in_func Cr_z_in_func
++#define intf Cr_z_intf
++#define out_func Cr_z_out_func
++#define uInt Cr_z_uInt
++#define uIntf Cr_z_uIntf
++#define uLong Cr_z_uLong
++#define uLongf Cr_z_uLongf
++#define voidp Cr_z_voidp
++#define voidpc Cr_z_voidpc
++#define voidpf Cr_z_voidpf
++#define gz_header_s Cr_z_gz_header_s
++#define internal_state Cr_z_internal_state
++/* #undef z_off64_t */
+
-+#ifdef HAVE_VISIBILITY_ATTRIBUTE
-+#define ZEXTERN __attribute__((visibility ("default"))) extern
-+#endif
++/* An exported symbol that isn't handled by Z_PREFIX in zconf.h */
++#define z_errmsg Cr_z_z_errmsg
+
-+/* Exported Symbols */
-+#define zlibVersion MOZ_Z_zlibVersion
-+#define deflate MOZ_Z_deflate
-+#define deflateEnd MOZ_Z_deflateEnd
-+#define inflate MOZ_Z_inflate
-+#define inflateEnd MOZ_Z_inflateEnd
-+#define deflateSetDictionary MOZ_Z_deflateSetDictionary
-+#define deflateCopy MOZ_Z_deflateCopy
-+#define deflateReset MOZ_Z_deflateReset
-+#define deflateParams MOZ_Z_deflateParams
-+#define deflateBound MOZ_Z_deflateBound
-+#define deflatePrime MOZ_Z_deflatePrime
-+#define inflateSetDictionary MOZ_Z_inflateSetDictionary
-+#define inflateSync MOZ_Z_inflateSync
-+#define inflateCopy MOZ_Z_inflateCopy
-+#define inflateReset MOZ_Z_inflateReset
-+#define inflateBack MOZ_Z_inflateBack
-+#define inflateBackEnd MOZ_Z_inflateBackEnd
-+#define zlibCompileFlags MOZ_Z_zlibCompileFlags
-+#define compress MOZ_Z_compress
-+#define compress2 MOZ_Z_compress2
-+#define compressBound MOZ_Z_compressBound
-+#define uncompress MOZ_Z_uncompress
-+#define gzopen MOZ_Z_gzopen
-+#define gzdopen MOZ_Z_gzdopen
-+#define gzsetparams MOZ_Z_gzsetparams
-+#define gzread MOZ_Z_gzread
-+#define gzwrite MOZ_Z_gzwrite
-+#define gzprintf MOZ_Z_gzprintf
-+#define gzvprintf MOZ_Z_gzvprintf
-+#define gzputs MOZ_Z_gzputs
-+#define gzgets MOZ_Z_gzgets
-+#define gzputc MOZ_Z_gzputc
-+#define gzgetc MOZ_Z_gzgetc
-+#define gzgetc_ MOZ_Z_gzgetc_
-+#define gzungetc MOZ_Z_gzungetc
-+#define gzflush MOZ_Z_gzflush
-+#define gzseek MOZ_Z_gzseek
-+#define gzrewind MOZ_Z_gzrewind
-+#define gztell MOZ_Z_gztell
-+#define gzeof MOZ_Z_gzeof
-+#define gzclose MOZ_Z_gzclose
-+#define gzerror MOZ_Z_gzerror
-+#define gzclearerr MOZ_Z_gzclearerr
-+#define adler32 MOZ_Z_adler32
-+#define crc32 MOZ_Z_crc32
-+#define deflateInit_ MOZ_Z_deflateInit_
-+#define deflateInit2_ MOZ_Z_deflateInit2_
-+#define inflateInit_ MOZ_Z_inflateInit_
-+#define inflateInit2_ MOZ_Z_inflateInit2_
-+#define inflateBackInit_ MOZ_Z_inflateBackInit_
-+#define inflateSyncPoint MOZ_Z_inflateSyncPoint
-+#define get_crc_table MOZ_Z_get_crc_table
-+#define zError MOZ_Z_zError
-+
-+/* Extra global symbols */
-+#define _dist_code MOZ_Z__dist_code
-+#define _length_code MOZ_Z__length_code
-+#define _tr_align MOZ_Z__tr_align
-+#define _tr_flush_block MOZ_Z__tr_flush_block
-+#define _tr_init MOZ_Z__tr_init
-+#define _tr_stored_block MOZ_Z__tr_stored_block
-+#define _tr_tally MOZ_Z__tr_tally
-+#define deflate_copyright MOZ_Z_deflate_copyright
-+#define inflate_copyright MOZ_Z_inflate_copyright
-+#define inflate_fast MOZ_Z_inflate_fast
-+#define inflate_table MOZ_Z_inflate_table
-+#define z_errmsg MOZ_Z_z_errmsg
-+#define zcalloc MOZ_Z_zcalloc
-+#define zcfree MOZ_Z_zcfree
-+#define alloc_func MOZ_Z_alloc_func
-+#define free_func MOZ_Z_free_func
-+#define in_func MOZ_Z_in_func
-+#define out_func MOZ_Z_out_func
-+
-+/* New as of libpng-1.2.3 */
-+#define adler32_combine MOZ_Z_adler32_combine
-+#define crc32_combine MOZ_Z_crc32_combine
-+#define deflateSetHeader MOZ_Z_deflateSetHeader
-+#define deflateTune MOZ_Z_deflateTune
-+#define gzdirect MOZ_Z_gzdirect
-+#define inflatePrime MOZ_Z_inflatePrime
-+#define inflateGetHeader MOZ_Z_inflateGetHeader
-+
-+/* New as of zlib 1.2.5 */
-+#define gzoffset MOZ_Z_gzoffset
-+#define gzopen64 MOZ_Z_gzopen64
-+#define gzseek64 MOZ_Z_gzseek64
-+#define gztell64 MOZ_Z_gztell64
-+#define gzoffset64 MOZ_Z_gzoffset64
-+#define adler32_combine64 MOZ_Z_adler32_combine64
-+#define crc32_combine64 MOZ_Z_crc32_combine64
-+#define gz_error MOZ_Z_gz_error
-+#define gz_intmax MOZ_Z_gz_intmax
-+#define gz_strwinerror MOZ_Z_gz_strwinerror
-+#define gzbuffer MOZ_Z_gzbuffer
-+#define gzclose_r MOZ_Z_gzclose_r
-+#define gzclose_w MOZ_Z_gzclose_w
-+#define inflateMark MOZ_Z_inflateMark
-+#define inflateReset2 MOZ_Z_inflateReset2
-+#define inflateUndermine MOZ_Z_inflateUndermine
-+#define charf MOZ_Z_charf
-+#define gzFile MOZ_Z_gzFile
-+#define gz_header MOZ_Z_gz_header
-+#define gz_headerp MOZ_Z_gz_headerp
-+#define intf MOZ_Z_intf
-+#define uInt MOZ_Z_uInt
-+#define uIntf MOZ_Z_uIntf
-+#define uLong MOZ_Z_uLong
-+#define uLongf MOZ_Z_uLongf
-+#define voidp MOZ_Z_voidp
-+#define voidpc MOZ_Z_voidpc
-+#define voidpf MOZ_Z_voidpf
-+#define gz_header_s MOZ_Z_gz_header_s
-+#define internal_state MOZ_Z_internal_state
-+
-+/* New as of zlib 1.2.8 */
-+#define _tr_flush_bits MOZ_Z__tr_flush_bits
-+#define deflateResetKeep MOZ_Z_deflateResetKeep
-+#define deflatePending MOZ_Z_deflatePending
-+#define inflateGetDictionary MOZ_Z_inflateGetDictionary
-+#define inflateResetKeep MOZ_Z_inflateResetKeep
-+#define gzopen_w MOZ_Z_gzopen_w
-+
-+/* Mangle Byte types except on Mac. */
-+#if !defined(__MACTYPES__)
-+#define Byte MOZ_Z_Byte
-+#define Bytef MOZ_Z_Bytef
-+#endif
-+
-+#endif
-diff --git a/third_party/zlib/zconf.h b/third_party/zlib/zconf.h
-index 9987a77..1b1d88b 100644
---- a/third_party/zlib/zconf.h
-+++ b/third_party/zlib/zconf.h
++#endif /* THIRD_PARTY_ZLIB_NAMES_H_ */
+diff --git a/zconf.h b/zconf.h
+index 5e1d68a004e9..a7a815f575a7 100644
+--- a/zconf.h
++++ b/zconf.h
@@ -8,6 +8,9 @@
#ifndef ZCONF_H
#define ZCONF_H
+/* This include does prefixing as below, but with an updated set of names */
-+#include "mozzconf.h"
++#include "names.h"
+
/*
* If you *really* need a unique prefix for all types and library functions,
* compile with -DZ_PREFIX. The "standard" zlib should be compiled without it.
-@@ -408,7 +411,7 @@ typedef uLong FAR uLongf;
+@@ -431,7 +434,7 @@ typedef uLong FAR uLongf;
typedef unsigned long z_crc_t;
#endif
@@ -324,27 +325,23 @@
# define Z_HAVE_UNISTD_H
#endif
-diff --git a/third_party/zlib/zlib.h b/third_party/zlib/zlib.h
-index 3e0c767..36c73af 100644
---- a/third_party/zlib/zlib.h
-+++ b/third_party/zlib/zlib.h
-@@ -1678,8 +1678,14 @@ ZEXTERN int ZEXPORT gzgetc_ OF((gzFile file)); /* backward compatibility */
+diff --git a/zlib.h b/zlib.h
+index f09cdaf1e054..99fd467f6b1a 100644
+--- a/zlib.h
++++ b/zlib.h
+@@ -1824,6 +1824,11 @@ ZEXTERN int ZEXPORT gzgetc_ OF((gzFile file)); /* backward compatibility */
+ # undef z_gzgetc
# define z_gzgetc(g) \
- ((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) : gzgetc(g))
- #else
--# define gzgetc(g) \
-+# ifdef MOZZCONF_H
+ ((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) : (gzgetc)(g))
++#elif defined(Z_CR_PREFIX_SET)
+# undef gzgetc
+# define gzgetc(g) \
-+ ((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) : MOZ_Z_gzgetc(g))
-+# else
-+# define gzgetc(g) \
- ((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) : gzgetc(g))
-+# endif
- #endif
-
- /* provide 64-bit offset functions if _LARGEFILE64_SOURCE defined, and/or
-@@ -1706,11 +1712,29 @@ ZEXTERN int ZEXPORT gzgetc_ OF((gzFile file)); /* backward compatibility */
++ ((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) \
++ : (Cr_z_gzgetc)(g))
+ #else
+ # define gzgetc(g) \
+ ((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) : (gzgetc)(g))
+@@ -1853,11 +1858,29 @@ ZEXTERN int ZEXPORT gzgetc_ OF((gzFile file)); /* backward compatibility */
# define z_adler32_combine z_adler32_combine64
# define z_crc32_combine z_crc32_combine64
# else
@@ -374,10 +371,10 @@
# define crc32_combine crc32_combine64
# endif
# ifndef Z_LARGE64
-diff --git a/third_party/zlib/zutil.h b/third_party/zlib/zutil.h
-index 24ab06b..fe9e53c 100644
---- a/third_party/zlib/zutil.h
-+++ b/third_party/zlib/zutil.h
+diff --git a/zutil.h b/zutil.h
+index b079ea6a80f5..80375b8b6109 100644
+--- a/zutil.h
++++ b/zutil.h
@@ -28,6 +28,21 @@
# include <string.h>
# include <stdlib.h>
@@ -400,19 +397,3 @@
#ifdef Z_SOLO
typedef long ptrdiff_t; /* guess -- will be caught if guess is wrong */
-@@ -135,6 +150,12 @@ extern z_const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
- # define OS_CODE 0x0a
- #endif
-
-+#ifdef _MSC_VER
-+#define zalign(x) __declspec(align(x))
-+#else
-+#define zalign(x) __attribute__((aligned((x))))
-+#endif
-+
- #ifdef WIN32
- # ifndef __CYGWIN__ /* Cygwin is Unix, not Win32 */
- # define OS_CODE 0x0b
---
-2.7.4
-
diff --git a/gzguts.h b/gzguts.h
index d87659d..990a4d2 100644
--- a/gzguts.h
+++ b/gzguts.h
@@ -1,5 +1,5 @@
/* gzguts.h -- zlib internal header definitions for gz* operations
- * Copyright (C) 2004, 2005, 2010, 2011, 2012, 2013 Mark Adler
+ * Copyright (C) 2004, 2005, 2010, 2011, 2012, 2013, 2016 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@@ -25,6 +25,10 @@
# include <stdlib.h>
# include <limits.h>
#endif
+
+#ifndef _POSIX_SOURCE
+# define _POSIX_SOURCE
+#endif
#include <fcntl.h>
#ifdef _WIN32
@@ -35,6 +39,10 @@
# include <io.h>
#endif
+#if defined(_WIN32) || defined(__CYGWIN__)
+# define WIDECHAR
+#endif
+
#ifdef WINAPI_FAMILY
# define open _open
# define read _read
@@ -95,18 +103,19 @@
# endif
#endif
-/* unlike snprintf (which is required in C99, yet still not supported by
- Microsoft more than a decade later!), _snprintf does not guarantee null
- termination of the result -- however this is only used in gzlib.c where
+/* unlike snprintf (which is required in C99), _snprintf does not guarantee
+ null termination of the result -- however this is only used in gzlib.c where
the result is assured to fit in the space provided */
-#ifdef _MSC_VER
+#if defined(_MSC_VER) && _MSC_VER < 1900
# define snprintf _snprintf
#endif
#ifndef local
# define local static
#endif
-/* compile with -Dlocal if your debugger can't find static symbols */
+/* since "static" is used to mean two completely different things in C, we
+ define "local" for the non-static meaning of "static", for readability
+ (compile with -Dlocal if your debugger can't find static symbols) */
/* gz* functions always use library allocation functions */
#ifndef STDC
@@ -170,7 +179,7 @@
char *path; /* path or fd for error messages */
unsigned size; /* buffer size, zero if not allocated yet */
unsigned want; /* requested buffer size, default is GZBUFSIZE */
- unsigned char *in; /* input buffer */
+ unsigned char *in; /* input buffer (double-sized when writing) */
unsigned char *out; /* output buffer (double-sized when reading) */
int direct; /* 0 if processing gzip, 1 if transparent */
/* just for reading */
diff --git a/gzlib.c b/gzlib.c
index fae202e..4105e6a 100644
--- a/gzlib.c
+++ b/gzlib.c
@@ -1,11 +1,11 @@
/* gzlib.c -- zlib functions common to reading and writing gzip files
- * Copyright (C) 2004, 2010, 2011, 2012, 2013 Mark Adler
+ * Copyright (C) 2004-2017 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#include "gzguts.h"
-#if defined(_WIN32) && !defined(__BORLANDC__)
+#if defined(_WIN32) && !defined(__BORLANDC__) && !defined(__MINGW32__)
# define LSEEK _lseeki64
#else
#if defined(_LARGEFILE64_SOURCE) && _LFS64_LARGEFILE-0
@@ -94,7 +94,7 @@
const char *mode;
{
gz_statep state;
- size_t len;
+ z_size_t len;
int oflag;
#ifdef O_CLOEXEC
int cloexec = 0;
@@ -188,10 +188,10 @@
}
/* save the path name for error messages */
-#ifdef _WIN32
+#ifdef WIDECHAR
if (fd == -2) {
len = wcstombs(NULL, path, 0);
- if (len == (size_t)-1)
+ if (len == (z_size_t)-1)
len = 0;
}
else
@@ -202,7 +202,7 @@
free(state);
return NULL;
}
-#ifdef _WIN32
+#ifdef WIDECHAR
if (fd == -2)
if (len)
wcstombs(state->path, path, len + 1);
@@ -211,7 +211,7 @@
else
#endif
#if !defined(NO_snprintf) && !defined(NO_vsnprintf)
- snprintf(state->path, len + 1, "%s", (const char *)path);
+ (void)snprintf(state->path, len + 1, "%s", (const char *)path);
#else
strcpy(state->path, path);
#endif
@@ -239,7 +239,7 @@
/* open the file with the appropriate flags (or just use fd) */
state->fd = fd > -1 ? fd : (
-#ifdef _WIN32
+#ifdef WIDECHAR
fd == -2 ? _wopen(path, oflag, 0666) :
#endif
open((const char *)path, oflag, 0666));
@@ -248,8 +248,10 @@
free(state);
return NULL;
}
- if (state->mode == GZ_APPEND)
+ if (state->mode == GZ_APPEND) {
+ LSEEK(state->fd, 0, SEEK_END); /* so gzoffset() is correct */
state->mode = GZ_WRITE; /* simplify later checks */
+ }
/* save the current position for rewinding (only if reading) */
if (state->mode == GZ_READ) {
@@ -291,7 +293,7 @@
if (fd == -1 || (path = (char *)malloc(7 + 3 * sizeof(int))) == NULL)
return NULL;
#if !defined(NO_snprintf) && !defined(NO_vsnprintf)
- snprintf(path, 7 + 3 * sizeof(int), "<fd:%d>", fd); /* for debugging */
+ (void)snprintf(path, 7 + 3 * sizeof(int), "<fd:%d>", fd);
#else
sprintf(path, "<fd:%d>", fd); /* for debugging */
#endif
@@ -301,7 +303,7 @@
}
/* -- see zlib.h -- */
-#ifdef _WIN32
+#ifdef WIDECHAR
gzFile ZEXPORT gzopen_w(path, mode)
const wchar_t *path;
const char *mode;
@@ -329,6 +331,8 @@
return -1;
/* check and set requested size */
+ if ((size << 1) < size)
+ return -1; /* need to be able to double it */
if (size < 2)
size = 2; /* need two bytes to check magic header */
state->want = size;
@@ -604,14 +608,13 @@
return;
}
#if !defined(NO_snprintf) && !defined(NO_vsnprintf)
- snprintf(state->msg, strlen(state->path) + strlen(msg) + 3,
- "%s%s%s", state->path, ": ", msg);
+ (void)snprintf(state->msg, strlen(state->path) + strlen(msg) + 3,
+ "%s%s%s", state->path, ": ", msg);
#else
strcpy(state->msg, state->path);
strcat(state->msg, ": ");
strcat(state->msg, msg);
#endif
- return;
}
#ifndef INT_MAX
diff --git a/gzread.c b/gzread.c
index 4e11246..832d3ef 100644
--- a/gzread.c
+++ b/gzread.c
@@ -1,5 +1,5 @@
/* gzread.c -- zlib functions for reading gzip files
- * Copyright (C) 2004, 2005, 2010, 2011, 2012, 2013 Mark Adler
+ * Copyright (C) 2004, 2005, 2010, 2011, 2012, 2013, 2016 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@@ -12,6 +12,7 @@
local int gz_decomp OF((gz_statep));
local int gz_fetch OF((gz_statep));
local int gz_skip OF((gz_statep, z_off64_t));
+local z_size_t gz_read OF((gz_statep, voidp, z_size_t));
/* Use read() to load a buffer -- return -1 on error, otherwise 0. Read from
state->fd, and update state->eof, state->err, and state->msg as appropriate.
@@ -24,13 +25,17 @@
unsigned *have;
{
int ret;
+ unsigned get, max = ((unsigned)-1 >> 2) + 1;
*have = 0;
do {
- ret = read(state->fd, buf + *have, len - *have);
+ get = len - *have;
+ if (get > max)
+ get = max;
+ ret = read(state->fd, buf + *have, get);
if (ret <= 0)
break;
- *have += ret;
+ *have += (unsigned)ret;
} while (*have < len);
if (ret < 0) {
gz_error(state, Z_ERRNO, zstrerror());
@@ -94,10 +99,8 @@
state->in = (unsigned char *)malloc(state->want);
state->out = (unsigned char *)malloc(state->want << 1);
if (state->in == NULL || state->out == NULL) {
- if (state->out != NULL)
- free(state->out);
- if (state->in != NULL)
- free(state->in);
+ free(state->out);
+ free(state->in);
gz_error(state, Z_MEM_ERROR, "out of memory");
return -1;
}
@@ -284,33 +287,17 @@
return 0;
}
-/* -- see zlib.h -- */
-int ZEXPORT gzread(file, buf, len)
- gzFile file;
- voidp buf;
- unsigned len;
-{
- unsigned got, n;
+/* Read len bytes into buf from file, or less than len up to the end of the
+ input. Return the number of bytes read. If zero is returned, either the
+ end of file was reached, or there was an error. state->err must be
+ consulted in that case to determine which. */
+local z_size_t gz_read(state, buf, len)
gz_statep state;
- z_streamp strm;
-
- /* get internal structure */
- if (file == NULL)
- return -1;
- state = (gz_statep)file;
- strm = &(state->strm);
-
- /* check that we're reading and that there's no (serious) error */
- if (state->mode != GZ_READ ||
- (state->err != Z_OK && state->err != Z_BUF_ERROR))
- return -1;
-
- /* since an int is returned, make sure len fits in one, otherwise return
- with an error (this avoids the flaw in the interface) */
- if ((int)len < 0) {
- gz_error(state, Z_DATA_ERROR, "requested length does not fit in int");
- return -1;
- }
+ voidp buf;
+ z_size_t len;
+{
+ z_size_t got;
+ unsigned n;
/* if len is zero, avoid unnecessary operations */
if (len == 0)
@@ -320,32 +307,38 @@
if (state->seek) {
state->seek = 0;
if (gz_skip(state, state->skip) == -1)
- return -1;
+ return 0;
}
/* get len bytes to buf, or less than len if at the end */
got = 0;
do {
+ /* set n to the maximum amount of len that fits in an unsigned int */
+ n = -1;
+ if (n > len)
+ n = len;
+
/* first just try copying data from the output buffer */
if (state->x.have) {
- n = state->x.have > len ? len : state->x.have;
+ if (state->x.have < n)
+ n = state->x.have;
memcpy(buf, state->x.next, n);
state->x.next += n;
state->x.have -= n;
}
/* output buffer empty -- return if we're at the end of the input */
- else if (state->eof && strm->avail_in == 0) {
+ else if (state->eof && state->strm.avail_in == 0) {
state->past = 1; /* tried to read past end */
break;
}
/* need output data -- for small len or new stream load up our output
buffer */
- else if (state->how == LOOK || len < (state->size << 1)) {
+ else if (state->how == LOOK || n < (state->size << 1)) {
/* get more output, looking for header if required */
if (gz_fetch(state) == -1)
- return -1;
+ return 0;
continue; /* no progress yet -- go back to copy above */
/* the copy above assures that we will leave with space in the
output buffer, allowing at least one gzungetc() to succeed */
@@ -353,16 +346,16 @@
/* large len -- read directly into user buffer */
else if (state->how == COPY) { /* read directly */
- if (gz_load(state, (unsigned char *)buf, len, &n) == -1)
- return -1;
+ if (gz_load(state, (unsigned char *)buf, n, &n) == -1)
+ return 0;
}
/* large len -- decompress directly into user buffer */
else { /* state->how == GZIP */
- strm->avail_out = len;
- strm->next_out = (unsigned char *)buf;
+ state->strm.avail_out = n;
+ state->strm.next_out = (unsigned char *)buf;
if (gz_decomp(state) == -1)
- return -1;
+ return 0;
n = state->x.have;
state->x.have = 0;
}
@@ -374,8 +367,75 @@
state->x.pos += n;
} while (len);
- /* return number of bytes read into user buffer (will fit in int) */
- return (int)got;
+ /* return number of bytes read into user buffer */
+ return got;
+}
+
+/* -- see zlib.h -- */
+int ZEXPORT gzread(file, buf, len)
+ gzFile file;
+ voidp buf;
+ unsigned len;
+{
+ gz_statep state;
+
+ /* get internal structure */
+ if (file == NULL)
+ return -1;
+ state = (gz_statep)file;
+
+ /* check that we're reading and that there's no (serious) error */
+ if (state->mode != GZ_READ ||
+ (state->err != Z_OK && state->err != Z_BUF_ERROR))
+ return -1;
+
+ /* since an int is returned, make sure len fits in one, otherwise return
+ with an error (this avoids a flaw in the interface) */
+ if ((int)len < 0) {
+ gz_error(state, Z_STREAM_ERROR, "request does not fit in an int");
+ return -1;
+ }
+
+ /* read len or fewer bytes to buf */
+ len = gz_read(state, buf, len);
+
+ /* check for an error */
+ if (len == 0 && state->err != Z_OK && state->err != Z_BUF_ERROR)
+ return -1;
+
+ /* return the number of bytes read (this is assured to fit in an int) */
+ return (int)len;
+}
+
+/* -- see zlib.h -- */
+z_size_t ZEXPORT gzfread(buf, size, nitems, file)
+ voidp buf;
+ z_size_t size;
+ z_size_t nitems;
+ gzFile file;
+{
+ z_size_t len;
+ gz_statep state;
+
+ /* get internal structure */
+ if (file == NULL)
+ return 0;
+ state = (gz_statep)file;
+
+ /* check that we're reading and that there's no (serious) error */
+ if (state->mode != GZ_READ ||
+ (state->err != Z_OK && state->err != Z_BUF_ERROR))
+ return 0;
+
+ /* compute bytes to read -- error on overflow */
+ len = nitems * size;
+ if (size && len / size != nitems) {
+ gz_error(state, Z_STREAM_ERROR, "request does not fit in a size_t");
+ return 0;
+ }
+
+ /* read len or fewer bytes to buf, return the number of full items read */
+ return len ? gz_read(state, buf, len) / size : 0;
}
/* -- see zlib.h -- */
@@ -383,8 +443,8 @@
# undef z_gzgetc
#else
# undef gzgetc
-# ifdef MOZZCONF_H
-# define gzgetc MOZ_Z_gzgetc
+# ifdef Z_CR_PREFIX_SET
+# define gzgetc Cr_z_gzgetc
# endif
#endif
@@ -412,8 +472,8 @@
return *(state->x.next)++;
}
- /* nothing there -- try gzread() */
- ret = gzread(file, buf, 1);
+ /* nothing there -- try gz_read() */
+ ret = gz_read(state, buf, 1);
return ret < 1 ? -1 : buf[0];
}
@@ -455,7 +515,7 @@
if (state->x.have == 0) {
state->x.have = 1;
state->x.next = state->out + (state->size << 1) - 1;
- state->x.next[0] = c;
+ state->x.next[0] = (unsigned char)c;
state->x.pos--;
state->past = 0;
return c;
@@ -477,7 +537,7 @@
}
state->x.have++;
state->x.next--;
- state->x.next[0] = c;
+ state->x.next[0] = (unsigned char)c;
state->x.pos--;
state->past = 0;
return c;
diff --git a/gzwrite.c b/gzwrite.c
index aa767fb..c7b5651 100644
--- a/gzwrite.c
+++ b/gzwrite.c
@@ -1,5 +1,5 @@
/* gzwrite.c -- zlib functions for writing gzip files
- * Copyright (C) 2004, 2005, 2010, 2011, 2012, 2013 Mark Adler
+ * Copyright (C) 2004-2017 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@@ -9,17 +9,19 @@
local int gz_init OF((gz_statep));
local int gz_comp OF((gz_statep, int));
local int gz_zero OF((gz_statep, z_off64_t));
+local z_size_t gz_write OF((gz_statep, voidpc, z_size_t));
/* Initialize state for writing a gzip file. Mark initialization by setting
- state->size to non-zero. Return -1 on failure or 0 on success. */
+ state->size to non-zero. Return -1 on a memory allocation failure, or 0 on
+ success. */
local int gz_init(state)
gz_statep state;
{
int ret;
z_streamp strm = &(state->strm);
- /* allocate input buffer */
- state->in = (unsigned char *)malloc(state->want);
+ /* allocate input buffer (double size for gzprintf) */
+ state->in = (unsigned char *)malloc(state->want << 1);
if (state->in == NULL) {
gz_error(state, Z_MEM_ERROR, "out of memory");
return -1;
@@ -47,6 +49,7 @@
gz_error(state, Z_MEM_ERROR, "out of memory");
return -1;
}
+ strm->next_in = NULL;
}
/* mark state as initialized */
@@ -62,17 +65,17 @@
}
/* Compress whatever is at avail_in and next_in and write to the output file.
- Return -1 if there is an error writing to the output file, otherwise 0.
- flush is assumed to be a valid deflate() flush value. If flush is Z_FINISH,
- then the deflate() state is reset to start a new gzip stream. If gz->direct
- is true, then simply write to the output file without compressing, and
- ignore flush. */
+ Return -1 if there is an error writing to the output file or if gz_init()
+ fails to allocate memory, otherwise 0. flush is assumed to be a valid
+ deflate() flush value. If flush is Z_FINISH, then the deflate() state is
+ reset to start a new gzip stream. If gz->direct is true, then simply write
+ to the output file without compressing, and ignore flush. */
local int gz_comp(state, flush)
gz_statep state;
int flush;
{
- int ret, got;
- unsigned have;
+ int ret, writ;
+ unsigned have, put, max = ((unsigned)-1 >> 2) + 1;
z_streamp strm = &(state->strm);
/* allocate memory if this is the first time through */
@@ -81,12 +84,16 @@
/* write directly if requested */
if (state->direct) {
- got = write(state->fd, strm->next_in, strm->avail_in);
- if (got < 0 || (unsigned)got != strm->avail_in) {
- gz_error(state, Z_ERRNO, zstrerror());
- return -1;
+ while (strm->avail_in) {
+ put = strm->avail_in > max ? max : strm->avail_in;
+ writ = write(state->fd, strm->next_in, put);
+ if (writ < 0) {
+ gz_error(state, Z_ERRNO, zstrerror());
+ return -1;
+ }
+ strm->avail_in -= (unsigned)writ;
+ strm->next_in += writ;
}
- strm->avail_in = 0;
return 0;
}
@@ -97,17 +104,21 @@
doing Z_FINISH then don't write until we get to Z_STREAM_END */
if (strm->avail_out == 0 || (flush != Z_NO_FLUSH &&
(flush != Z_FINISH || ret == Z_STREAM_END))) {
- have = (unsigned)(strm->next_out - state->x.next);
- if (have && ((got = write(state->fd, state->x.next, have)) < 0 ||
- (unsigned)got != have)) {
- gz_error(state, Z_ERRNO, zstrerror());
- return -1;
+ while (strm->next_out > state->x.next) {
+ put = strm->next_out - state->x.next > (int)max ? max :
+ (unsigned)(strm->next_out - state->x.next);
+ writ = write(state->fd, state->x.next, put);
+ if (writ < 0) {
+ gz_error(state, Z_ERRNO, zstrerror());
+ return -1;
+ }
+ state->x.next += writ;
}
if (strm->avail_out == 0) {
strm->avail_out = state->size;
strm->next_out = state->out;
+ state->x.next = state->out;
}
- state->x.next = strm->next_out;
}
/* compress */
@@ -129,7 +140,8 @@
return 0;
}
-/* Compress len zeros to output. Return -1 on error, 0 on success. */
+/* Compress len zeros to output. Return -1 on a write error or memory
+ allocation failure by gz_comp(), or 0 on success. */
local int gz_zero(state, len)
gz_statep state;
z_off64_t len;
@@ -161,32 +173,14 @@
return 0;
}
-/* -- see zlib.h -- */
-int ZEXPORT gzwrite(file, buf, len)
- gzFile file;
- voidpc buf;
- unsigned len;
-{
- unsigned put = len;
+/* Write len bytes from buf to file. Return the number of bytes written. If
+ the returned value is less than len, then there was an error. */
+local z_size_t gz_write(state, buf, len)
gz_statep state;
- z_streamp strm;
-
- /* get internal structure */
- if (file == NULL)
- return 0;
- state = (gz_statep)file;
- strm = &(state->strm);
-
- /* check that we're writing and that there's no error */
- if (state->mode != GZ_WRITE || state->err != Z_OK)
- return 0;
-
- /* since an int is returned, make sure len fits in one, otherwise return
- with an error (this avoids the flaw in the interface) */
- if ((int)len < 0) {
- gz_error(state, Z_DATA_ERROR, "requested length does not fit in int");
- return 0;
- }
+ voidpc buf;
+ z_size_t len;
+{
+ z_size_t put = len;
/* if len is zero, avoid unnecessary operations */
if (len == 0)
@@ -209,14 +203,15 @@
do {
unsigned have, copy;
- if (strm->avail_in == 0)
- strm->next_in = state->in;
- have = (unsigned)((strm->next_in + strm->avail_in) - state->in);
+ if (state->strm.avail_in == 0)
+ state->strm.next_in = state->in;
+ have = (unsigned)((state->strm.next_in + state->strm.avail_in) -
+ state->in);
copy = state->size - have;
if (copy > len)
copy = len;
memcpy(state->in + have, buf, copy);
- strm->avail_in += copy;
+ state->strm.avail_in += copy;
state->x.pos += copy;
buf = (const char *)buf + copy;
len -= copy;
@@ -226,19 +221,83 @@
}
else {
/* consume whatever's left in the input buffer */
- if (strm->avail_in && gz_comp(state, Z_NO_FLUSH) == -1)
+ if (state->strm.avail_in && gz_comp(state, Z_NO_FLUSH) == -1)
return 0;
/* directly compress user buffer to file */
- strm->avail_in = len;
- strm->next_in = (z_const Bytef *)buf;
- state->x.pos += len;
- if (gz_comp(state, Z_NO_FLUSH) == -1)
- return 0;
+ state->strm.next_in = (z_const Bytef *)buf;
+ do {
+ unsigned n = (unsigned)-1;
+ if (n > len)
+ n = len;
+ state->strm.avail_in = n;
+ state->x.pos += n;
+ if (gz_comp(state, Z_NO_FLUSH) == -1)
+ return 0;
+ len -= n;
+ } while (len);
}
- /* input was all buffered or compressed (put will fit in int) */
- return (int)put;
+ /* input was all buffered or compressed */
+ return put;
+}
+
+/* -- see zlib.h -- */
+int ZEXPORT gzwrite(file, buf, len)
+ gzFile file;
+ voidpc buf;
+ unsigned len;
+{
+ gz_statep state;
+
+ /* get internal structure */
+ if (file == NULL)
+ return 0;
+ state = (gz_statep)file;
+
+ /* check that we're writing and that there's no error */
+ if (state->mode != GZ_WRITE || state->err != Z_OK)
+ return 0;
+
+ /* since an int is returned, make sure len fits in one, otherwise return
+ with an error (this avoids a flaw in the interface) */
+ if ((int)len < 0) {
+ gz_error(state, Z_DATA_ERROR, "requested length does not fit in int");
+ return 0;
+ }
+
+ /* write len bytes from buf (the return value will fit in an int) */
+ return (int)gz_write(state, buf, len);
+}
+
+/* -- see zlib.h -- */
+z_size_t ZEXPORT gzfwrite(buf, size, nitems, file)
+ voidpc buf;
+ z_size_t size;
+ z_size_t nitems;
+ gzFile file;
+{
+ z_size_t len;
+ gz_statep state;
+
+ /* get internal structure */
+ if (file == NULL)
+ return 0;
+ state = (gz_statep)file;
+
+ /* check that we're writing and that there's no error */
+ if (state->mode != GZ_WRITE || state->err != Z_OK)
+ return 0;
+
+ /* compute bytes to read -- error on overflow */
+ len = nitems * size;
+ if (size && len / size != nitems) {
+ gz_error(state, Z_STREAM_ERROR, "request does not fit in a size_t");
+ return 0;
+ }
+
+ /* write len bytes to buf, return the number of full items written */
+ return len ? gz_write(state, buf, len) / size : 0;
}
/* -- see zlib.h -- */
@@ -275,7 +334,7 @@
strm->next_in = state->in;
have = (unsigned)((strm->next_in + strm->avail_in) - state->in);
if (have < state->size) {
- state->in[have] = c;
+ state->in[have] = (unsigned char)c;
strm->avail_in++;
state->x.pos++;
return c & 0xff;
@@ -283,8 +342,8 @@
}
/* no room in buffer or not initialized, use gz_write() */
- buf[0] = c;
- if (gzwrite(file, buf, 1) != 1)
+ buf[0] = (unsigned char)c;
+ if (gz_write(state, buf, 1) != 1)
return -1;
return c & 0xff;
}
@@ -295,11 +354,21 @@
const char *str;
{
int ret;
- unsigned len;
+ z_size_t len;
+ gz_statep state;
+
+ /* get internal structure */
+ if (file == NULL)
+ return -1;
+ state = (gz_statep)file;
+
+ /* check that we're writing and that there's no error */
+ if (state->mode != GZ_WRITE || state->err != Z_OK)
+ return -1;
/* write string */
- len = (unsigned)strlen(str);
- ret = gzwrite(file, str, len);
+ len = strlen(str);
+ ret = gz_write(state, str, len);
return ret == 0 && len != 0 ? -1 : ret;
}
@@ -309,63 +378,73 @@
/* -- see zlib.h -- */
int ZEXPORTVA gzvprintf(gzFile file, const char *format, va_list va)
{
- int size, len;
+ int len;
+ unsigned left;
+ char *next;
gz_statep state;
z_streamp strm;
/* get internal structure */
if (file == NULL)
- return -1;
+ return Z_STREAM_ERROR;
state = (gz_statep)file;
strm = &(state->strm);
/* check that we're writing and that there's no error */
if (state->mode != GZ_WRITE || state->err != Z_OK)
- return 0;
+ return Z_STREAM_ERROR;
/* make sure we have some buffer space */
if (state->size == 0 && gz_init(state) == -1)
- return 0;
+ return state->err;
/* check for seek request */
if (state->seek) {
state->seek = 0;
if (gz_zero(state, state->skip) == -1)
- return 0;
+ return state->err;
}
- /* consume whatever's left in the input buffer */
- if (strm->avail_in && gz_comp(state, Z_NO_FLUSH) == -1)
- return 0;
-
- /* do the printf() into the input buffer, put length in len */
- size = (int)(state->size);
- state->in[size - 1] = 0;
+ /* do the printf() into the input buffer, put length in len -- the input
+ buffer is double-sized just for this function, so there is guaranteed to
+ be state->size bytes available after the current contents */
+ if (strm->avail_in == 0)
+ strm->next_in = state->in;
+ next = (char *)(state->in + (strm->next_in - state->in) + strm->avail_in);
+ next[state->size - 1] = 0;
#ifdef NO_vsnprintf
# ifdef HAS_vsprintf_void
- (void)vsprintf((char *)(state->in), format, va);
- for (len = 0; len < size; len++)
- if (state->in[len] == 0) break;
+ (void)vsprintf(next, format, va);
+ for (len = 0; len < state->size; len++)
+ if (next[len] == 0) break;
# else
- len = vsprintf((char *)(state->in), format, va);
+ len = vsprintf(next, format, va);
# endif
#else
# ifdef HAS_vsnprintf_void
- (void)vsnprintf((char *)(state->in), size, format, va);
- len = strlen((char *)(state->in));
+ (void)vsnprintf(next, state->size, format, va);
+ len = strlen(next);
# else
- len = vsnprintf((char *)(state->in), size, format, va);
+ len = vsnprintf(next, state->size, format, va);
# endif
#endif
/* check that printf() results fit in buffer */
- if (len <= 0 || len >= (int)size || state->in[size - 1] != 0)
+ if (len == 0 || (unsigned)len >= state->size || next[state->size - 1] != 0)
return 0;
- /* update buffer and position, defer compression until needed */
- strm->avail_in = (unsigned)len;
- strm->next_in = state->in;
+ /* update buffer and position, compress first half if past that */
+ strm->avail_in += (unsigned)len;
state->x.pos += len;
+ if (strm->avail_in >= state->size) {
+ left = strm->avail_in - state->size;
+ strm->avail_in = state->size;
+ if (gz_comp(state, Z_NO_FLUSH) == -1)
+ return state->err;
+ memcpy(state->in, state->in + state->size, left);
+ strm->next_in = state->in;
+ strm->avail_in = left;
+ }
return len;
}
@@ -390,73 +469,82 @@
int a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
a11, a12, a13, a14, a15, a16, a17, a18, a19, a20;
{
- int size, len;
+ unsigned len, left;
+ char *next;
gz_statep state;
z_streamp strm;
/* get internal structure */
if (file == NULL)
- return -1;
+ return Z_STREAM_ERROR;
state = (gz_statep)file;
strm = &(state->strm);
/* check that can really pass pointer in ints */
if (sizeof(int) != sizeof(void *))
- return 0;
+ return Z_STREAM_ERROR;
/* check that we're writing and that there's no error */
if (state->mode != GZ_WRITE || state->err != Z_OK)
- return 0;
+ return Z_STREAM_ERROR;
/* make sure we have some buffer space */
if (state->size == 0 && gz_init(state) == -1)
- return 0;
+ return state->error;
/* check for seek request */
if (state->seek) {
state->seek = 0;
if (gz_zero(state, state->skip) == -1)
- return 0;
+ return state->error;
}
- /* consume whatever's left in the input buffer */
- if (strm->avail_in && gz_comp(state, Z_NO_FLUSH) == -1)
- return 0;
-
- /* do the printf() into the input buffer, put length in len */
- size = (int)(state->size);
- state->in[size - 1] = 0;
+ /* do the printf() into the input buffer, put length in len -- the input
+ buffer is double-sized just for this function, so there is guaranteed to
+ be state->size bytes available after the current contents */
+ if (strm->avail_in == 0)
+ strm->next_in = state->in;
+ next = (char *)(strm->next_in + strm->avail_in);
+ next[state->size - 1] = 0;
#ifdef NO_snprintf
# ifdef HAS_sprintf_void
- sprintf((char *)(state->in), format, a1, a2, a3, a4, a5, a6, a7, a8,
- a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
+ sprintf(next, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11, a12,
+ a13, a14, a15, a16, a17, a18, a19, a20);
for (len = 0; len < size; len++)
- if (state->in[len] == 0) break;
+ if (next[len] == 0)
+ break;
# else
- len = sprintf((char *)(state->in), format, a1, a2, a3, a4, a5, a6, a7, a8,
- a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
+ len = sprintf(next, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11,
+ a12, a13, a14, a15, a16, a17, a18, a19, a20);
# endif
#else
# ifdef HAS_snprintf_void
- snprintf((char *)(state->in), size, format, a1, a2, a3, a4, a5, a6, a7, a8,
- a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
- len = strlen((char *)(state->in));
+ snprintf(next, state->size, format, a1, a2, a3, a4, a5, a6, a7, a8, a9,
+ a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
+ len = strlen(next);
# else
- len = snprintf((char *)(state->in), size, format, a1, a2, a3, a4, a5, a6,
- a7, a8, a9, a10, a11, a12, a13, a14, a15, a16, a17, a18,
- a19, a20);
+ len = snprintf(next, state->size, format, a1, a2, a3, a4, a5, a6, a7, a8,
+ a9, a10, a11, a12, a13, a14, a15, a16, a17, a18, a19, a20);
# endif
#endif
/* check that printf() results fit in buffer */
- if (len <= 0 || len >= (int)size || state->in[size - 1] != 0)
+ if (len == 0 || len >= state->size || next[state->size - 1] != 0)
return 0;
- /* update buffer and position, defer compression until needed */
- strm->avail_in = (unsigned)len;
- strm->next_in = state->in;
+ /* update buffer and position, compress first half if past that */
+ strm->avail_in += len;
state->x.pos += len;
- return len;
+ if (strm->avail_in >= state->size) {
+ left = strm->avail_in - state->size;
+ strm->avail_in = state->size;
+ if (gz_comp(state, Z_NO_FLUSH) == -1)
+ return state->err;
+ memcpy(state->in, state->in + state->size, left);
+ strm->next_in = state->in;
+ strm->avail_in = left;
+ }
+ return (int)len;
}
#endif
@@ -470,7 +558,7 @@
/* get internal structure */
if (file == NULL)
- return -1;
+ return Z_STREAM_ERROR;
state = (gz_statep)file;
/* check that we're writing and that there's no error */
@@ -485,11 +573,11 @@
if (state->seek) {
state->seek = 0;
if (gz_zero(state, state->skip) == -1)
- return -1;
+ return state->err;
}
/* compress remaining data with requested flush */
- gz_comp(state, flush);
+ (void)gz_comp(state, flush);
return state->err;
}
@@ -520,13 +608,13 @@
if (state->seek) {
state->seek = 0;
if (gz_zero(state, state->skip) == -1)
- return -1;
+ return state->err;
}
/* change compression parameters for subsequent input */
if (state->size) {
/* flush previous input with previous parameters before changing */
- if (strm->avail_in && gz_comp(state, Z_PARTIAL_FLUSH) == -1)
+ if (strm->avail_in && gz_comp(state, Z_BLOCK) == -1)
return state->err;
deflateParams(strm, level, strategy);
}
diff --git a/infback.c b/infback.c
index f3833c2..59679ec 100644
--- a/infback.c
+++ b/infback.c
@@ -1,5 +1,5 @@
/* infback.c -- inflate using a call-back interface
- * Copyright (C) 1995-2011 Mark Adler
+ * Copyright (C) 1995-2016 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@@ -61,7 +61,7 @@
Tracev((stderr, "inflate: allocated\n"));
strm->state = (struct internal_state FAR *)state;
state->dmax = 32768U;
- state->wbits = windowBits;
+ state->wbits = (uInt)windowBits;
state->wsize = 1U << windowBits;
state->window = window;
state->wnext = 0;
diff --git a/inffast.c b/inffast.c
index bda59ce..0dbd1db 100644
--- a/inffast.c
+++ b/inffast.c
@@ -1,5 +1,5 @@
/* inffast.c -- fast decoding
- * Copyright (C) 1995-2008, 2010, 2013 Mark Adler
+ * Copyright (C) 1995-2017 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@@ -8,26 +8,9 @@
#include "inflate.h"
#include "inffast.h"
-#ifndef ASMINF
-
-/* Allow machine dependent optimization for post-increment or pre-increment.
- Based on testing to date,
- Pre-increment preferred for:
- - PowerPC G3 (Adler)
- - MIPS R5000 (Randers-Pehrson)
- Post-increment preferred for:
- - none
- No measurable difference:
- - Pentium III (Anderson)
- - M68060 (Nikl)
- */
-#ifdef POSTINC
-# define OFF 0
-# define PUP(a) *(a)++
+#ifdef ASMINF
+# pragma message("Assembler code may have bugs -- use at your own risk")
#else
-# define OFF 1
-# define PUP(a) *++(a)
-#endif
/*
Decode literal, length, and distance codes and write out the resulting
@@ -96,9 +79,9 @@
/* copy state to local variables */
state = (struct inflate_state FAR *)strm->state;
- in = strm->next_in - OFF;
+ in = strm->next_in;
last = in + (strm->avail_in - 5);
- out = strm->next_out - OFF;
+ out = strm->next_out;
beg = out - (start - strm->avail_out);
end = out + (strm->avail_out - 257);
#ifdef INFLATE_STRICT
@@ -119,9 +102,9 @@
input data or output space */
do {
if (bits < 15) {
- hold += (unsigned long)(PUP(in)) << bits;
+ hold += (unsigned long)(*in++) << bits;
bits += 8;
- hold += (unsigned long)(PUP(in)) << bits;
+ hold += (unsigned long)(*in++) << bits;
bits += 8;
}
here = lcode[hold & lmask];
@@ -134,14 +117,14 @@
Tracevv((stderr, here.val >= 0x20 && here.val < 0x7f ?
"inflate: literal '%c'\n" :
"inflate: literal 0x%02x\n", here.val));
- PUP(out) = (unsigned char)(here.val);
+ *out++ = (unsigned char)(here.val);
}
else if (op & 16) { /* length base */
len = (unsigned)(here.val);
op &= 15; /* number of extra bits */
if (op) {
if (bits < op) {
- hold += (unsigned long)(PUP(in)) << bits;
+ hold += (unsigned long)(*in++) << bits;
bits += 8;
}
len += (unsigned)hold & ((1U << op) - 1);
@@ -150,9 +133,9 @@
}
Tracevv((stderr, "inflate: length %u\n", len));
if (bits < 15) {
- hold += (unsigned long)(PUP(in)) << bits;
+ hold += (unsigned long)(*in++) << bits;
bits += 8;
- hold += (unsigned long)(PUP(in)) << bits;
+ hold += (unsigned long)(*in++) << bits;
bits += 8;
}
here = dcode[hold & dmask];
@@ -165,10 +148,10 @@
dist = (unsigned)(here.val);
op &= 15; /* number of extra bits */
if (bits < op) {
- hold += (unsigned long)(PUP(in)) << bits;
+ hold += (unsigned long)(*in++) << bits;
bits += 8;
if (bits < op) {
- hold += (unsigned long)(PUP(in)) << bits;
+ hold += (unsigned long)(*in++) << bits;
bits += 8;
}
}
@@ -196,30 +179,30 @@
#ifdef INFLATE_ALLOW_INVALID_DISTANCE_TOOFAR_ARRR
if (len <= op - whave) {
do {
- PUP(out) = 0;
+ *out++ = 0;
} while (--len);
continue;
}
len -= op - whave;
do {
- PUP(out) = 0;
+ *out++ = 0;
} while (--op > whave);
if (op == 0) {
from = out - dist;
do {
- PUP(out) = PUP(from);
+ *out++ = *from++;
} while (--len);
continue;
}
#endif
}
- from = window - OFF;
+ from = window;
if (wnext == 0) { /* very common case */
from += wsize - op;
if (op < len) { /* some from window */
len -= op;
do {
- PUP(out) = PUP(from);
+ *out++ = *from++;
} while (--op);
from = out - dist; /* rest from output */
}
@@ -230,14 +213,14 @@
if (op < len) { /* some from end of window */
len -= op;
do {
- PUP(out) = PUP(from);
+ *out++ = *from++;
} while (--op);
- from = window - OFF;
+ from = window;
if (wnext < len) { /* some from start of window */
op = wnext;
len -= op;
do {
- PUP(out) = PUP(from);
+ *out++ = *from++;
} while (--op);
from = out - dist; /* rest from output */
}
@@ -248,35 +231,35 @@
if (op < len) { /* some from window */
len -= op;
do {
- PUP(out) = PUP(from);
+ *out++ = *from++;
} while (--op);
from = out - dist; /* rest from output */
}
}
while (len > 2) {
- PUP(out) = PUP(from);
- PUP(out) = PUP(from);
- PUP(out) = PUP(from);
+ *out++ = *from++;
+ *out++ = *from++;
+ *out++ = *from++;
len -= 3;
}
if (len) {
- PUP(out) = PUP(from);
+ *out++ = *from++;
if (len > 1)
- PUP(out) = PUP(from);
+ *out++ = *from++;
}
}
else {
from = out - dist; /* copy direct from output */
do { /* minimum length is three */
- PUP(out) = PUP(from);
- PUP(out) = PUP(from);
- PUP(out) = PUP(from);
+ *out++ = *from++;
+ *out++ = *from++;
+ *out++ = *from++;
len -= 3;
} while (len > 2);
if (len) {
- PUP(out) = PUP(from);
+ *out++ = *from++;
if (len > 1)
- PUP(out) = PUP(from);
+ *out++ = *from++;
}
}
}
@@ -313,8 +296,8 @@
hold &= (1U << bits) - 1;
/* update state and return */
- strm->next_in = in + OFF;
- strm->next_out = out + OFF;
+ strm->next_in = in;
+ strm->next_out = out;
strm->avail_in = (unsigned)(in < last ? 5 + (last - in) : 5 - (in - last));
strm->avail_out = (unsigned)(out < end ?
257 + (end - out) : 257 - (out - end));
diff --git a/inflate.c b/inflate.c
index 870f89b..ac333e8 100644
--- a/inflate.c
+++ b/inflate.c
@@ -1,5 +1,5 @@
/* inflate.c -- zlib decompression
- * Copyright (C) 1995-2012 Mark Adler
+ * Copyright (C) 1995-2016 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@@ -92,6 +92,7 @@
#endif
/* function prototypes */
+local int inflateStateCheck OF((z_streamp strm));
local void fixedtables OF((struct inflate_state FAR *state));
local int updatewindow OF((z_streamp strm, const unsigned char FAR *end,
unsigned copy));
@@ -101,12 +102,26 @@
local unsigned syncsearch OF((unsigned FAR *have, const unsigned char FAR *buf,
unsigned len));
+local int inflateStateCheck(strm)
+z_streamp strm;
+{
+ struct inflate_state FAR *state;
+ if (strm == Z_NULL ||
+ strm->zalloc == (alloc_func)0 || strm->zfree == (free_func)0)
+ return 1;
+ state = (struct inflate_state FAR *)strm->state;
+ if (state == Z_NULL || state->strm != strm ||
+ state->mode < HEAD || state->mode > SYNC)
+ return 1;
+ return 0;
+}
+
int ZEXPORT inflateResetKeep(strm)
z_streamp strm;
{
struct inflate_state FAR *state;
- if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
state = (struct inflate_state FAR *)strm->state;
strm->total_in = strm->total_out = state->total = 0;
strm->msg = Z_NULL;
@@ -131,7 +146,7 @@
{
struct inflate_state FAR *state;
- if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
state = (struct inflate_state FAR *)strm->state;
state->wsize = 0;
state->whave = 0;
@@ -147,7 +162,7 @@
struct inflate_state FAR *state;
/* get the state */
- if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
state = (struct inflate_state FAR *)strm->state;
/* extract wrap request from windowBits parameter */
@@ -156,7 +171,7 @@
windowBits = -windowBits;
}
else {
- wrap = (windowBits >> 4) + 1;
+ wrap = (windowBits >> 4) + 5;
#ifdef GUNZIP
if (windowBits < 48)
windowBits &= 15;
@@ -210,7 +225,9 @@
if (state == Z_NULL) return Z_MEM_ERROR;
Tracev((stderr, "inflate: allocated\n"));
strm->state = (struct internal_state FAR *)state;
+ state->strm = strm;
state->window = Z_NULL;
+ state->mode = HEAD; /* to pass state test in inflateReset2() */
ret = inflateReset2(strm, windowBits);
if (ret != Z_OK) {
ZFREE(strm, state);
@@ -234,17 +251,17 @@
{
struct inflate_state FAR *state;
- if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
state = (struct inflate_state FAR *)strm->state;
if (bits < 0) {
state->hold = 0;
state->bits = 0;
return Z_OK;
}
- if (bits > 16 || state->bits + bits > 32) return Z_STREAM_ERROR;
+ if (bits > 16 || state->bits + (uInt)bits > 32) return Z_STREAM_ERROR;
value &= (1L << bits) - 1;
- state->hold += value << state->bits;
- state->bits += bits;
+ state->hold += (unsigned)value << state->bits;
+ state->bits += (uInt)bits;
return Z_OK;
}
@@ -625,7 +642,7 @@
static const unsigned short order[19] = /* permutation of code lengths */
{16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};
- if (strm == Z_NULL || strm->state == Z_NULL || strm->next_out == Z_NULL ||
+ if (inflateStateCheck(strm) || strm->next_out == Z_NULL ||
(strm->next_in == Z_NULL && strm->avail_in != 0))
return Z_STREAM_ERROR;
@@ -645,6 +662,8 @@
NEEDBITS(16);
#ifdef GUNZIP
if ((state->wrap & 2) && hold == 0x8b1f) { /* gzip header */
+ if (state->wbits == 0)
+ state->wbits = 15;
state->check = crc32(0L, Z_NULL, 0);
CRC2(state->check, hold);
INITBITS();
@@ -672,7 +691,7 @@
len = BITS(4) + 8;
if (state->wbits == 0)
state->wbits = len;
- else if (len > state->wbits) {
+ if (len > 15 || len > state->wbits) {
strm->msg = (char *)"invalid window size";
state->mode = BAD;
break;
@@ -699,14 +718,16 @@
}
if (state->head != Z_NULL)
state->head->text = (int)((hold >> 8) & 1);
- if (state->flags & 0x0200) CRC2(state->check, hold);
+ if ((state->flags & 0x0200) && (state->wrap & 4))
+ CRC2(state->check, hold);
INITBITS();
state->mode = TIME;
case TIME:
NEEDBITS(32);
if (state->head != Z_NULL)
state->head->time = hold;
- if (state->flags & 0x0200) CRC4(state->check, hold);
+ if ((state->flags & 0x0200) && (state->wrap & 4))
+ CRC4(state->check, hold);
INITBITS();
state->mode = OS;
case OS:
@@ -715,7 +736,8 @@
state->head->xflags = (int)(hold & 0xff);
state->head->os = (int)(hold >> 8);
}
- if (state->flags & 0x0200) CRC2(state->check, hold);
+ if ((state->flags & 0x0200) && (state->wrap & 4))
+ CRC2(state->check, hold);
INITBITS();
state->mode = EXLEN;
case EXLEN:
@@ -724,7 +746,8 @@
state->length = (unsigned)(hold);
if (state->head != Z_NULL)
state->head->extra_len = (unsigned)hold;
- if (state->flags & 0x0200) CRC2(state->check, hold);
+ if ((state->flags & 0x0200) && (state->wrap & 4))
+ CRC2(state->check, hold);
INITBITS();
}
else if (state->head != Z_NULL)
@@ -742,7 +765,7 @@
len + copy > state->head->extra_max ?
state->head->extra_max - len : copy);
}
- if (state->flags & 0x0200)
+ if ((state->flags & 0x0200) && (state->wrap & 4))
state->check = crc32(state->check, next, copy);
have -= copy;
next += copy;
@@ -761,9 +784,9 @@
if (state->head != Z_NULL &&
state->head->name != Z_NULL &&
state->length < state->head->name_max)
- state->head->name[state->length++] = len;
+ state->head->name[state->length++] = (Bytef)len;
} while (len && copy < have);
- if (state->flags & 0x0200)
+ if ((state->flags & 0x0200) && (state->wrap & 4))
state->check = crc32(state->check, next, copy);
have -= copy;
next += copy;
@@ -782,9 +805,9 @@
if (state->head != Z_NULL &&
state->head->comment != Z_NULL &&
state->length < state->head->comm_max)
- state->head->comment[state->length++] = len;
+ state->head->comment[state->length++] = (Bytef)len;
} while (len && copy < have);
- if (state->flags & 0x0200)
+ if ((state->flags & 0x0200) && (state->wrap & 4))
state->check = crc32(state->check, next, copy);
have -= copy;
next += copy;
@@ -796,7 +819,7 @@
case HCRC:
if (state->flags & 0x0200) {
NEEDBITS(16);
- if (hold != (state->check & 0xffff)) {
+ if ((state->wrap & 4) && hold != (state->check & 0xffff)) {
strm->msg = (char *)"header crc mismatch";
state->mode = BAD;
break;
@@ -1177,11 +1200,11 @@
out -= left;
strm->total_out += out;
state->total += out;
- if (out)
+ if ((state->wrap & 4) && out)
strm->adler = state->check =
UPDATE(state->check, put - out, out);
out = left;
- if ((
+ if ((state->wrap & 4) && (
#ifdef GUNZIP
state->flags ? hold :
#endif
@@ -1240,10 +1263,10 @@
strm->total_in += in;
strm->total_out += out;
state->total += out;
- if (state->wrap && out)
+ if ((state->wrap & 4) && out)
strm->adler = state->check =
UPDATE(state->check, strm->next_out - out, out);
- strm->data_type = state->bits + (state->last ? 64 : 0) +
+ strm->data_type = (int)state->bits + (state->last ? 64 : 0) +
(state->mode == TYPE ? 128 : 0) +
(state->mode == LEN_ || state->mode == COPY_ ? 256 : 0);
if (((in == 0 && out == 0) || flush == Z_FINISH) && ret == Z_OK)
@@ -1255,7 +1278,7 @@
z_streamp strm;
{
struct inflate_state FAR *state;
- if (strm == Z_NULL || strm->state == Z_NULL || strm->zfree == (free_func)0)
+ if (inflateStateCheck(strm))
return Z_STREAM_ERROR;
state = (struct inflate_state FAR *)strm->state;
if (state->window != Z_NULL) ZFREE(strm, state->window);
@@ -1273,7 +1296,7 @@
struct inflate_state FAR *state;
/* check state */
- if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
state = (struct inflate_state FAR *)strm->state;
/* copy dictionary */
@@ -1298,7 +1321,7 @@
int ret;
/* check state */
- if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
state = (struct inflate_state FAR *)strm->state;
if (state->wrap != 0 && state->mode != DICT)
return Z_STREAM_ERROR;
@@ -1330,7 +1353,7 @@
struct inflate_state FAR *state;
/* check state */
- if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
state = (struct inflate_state FAR *)strm->state;
if ((state->wrap & 2) == 0) return Z_STREAM_ERROR;
@@ -1383,7 +1406,7 @@
struct inflate_state FAR *state;
/* check parameters */
- if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
state = (struct inflate_state FAR *)strm->state;
if (strm->avail_in == 0 && state->bits < 8) return Z_BUF_ERROR;
@@ -1430,7 +1453,7 @@
{
struct inflate_state FAR *state;
- if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
state = (struct inflate_state FAR *)strm->state;
return state->mode == STORED && state->bits == 0;
}
@@ -1445,8 +1468,7 @@
unsigned wsize;
/* check input */
- if (dest == Z_NULL || source == Z_NULL || source->state == Z_NULL ||
- source->zalloc == (alloc_func)0 || source->zfree == (free_func)0)
+ if (inflateStateCheck(source) || dest == Z_NULL)
return Z_STREAM_ERROR;
state = (struct inflate_state FAR *)source->state;
@@ -1467,6 +1489,7 @@
/* copy state */
zmemcpy((voidpf)dest, (voidpf)source, sizeof(z_stream));
zmemcpy((voidpf)copy, (voidpf)state, sizeof(struct inflate_state));
+ copy->strm = dest;
if (state->lencode >= state->codes &&
state->lencode <= state->codes + ENOUGH - 1) {
copy->lencode = copy->codes + (state->lencode - state->codes);
@@ -1488,25 +1511,51 @@
{
struct inflate_state FAR *state;
- if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
state = (struct inflate_state FAR *)strm->state;
- state->sane = !subvert;
#ifdef INFLATE_ALLOW_INVALID_DISTANCE_TOOFAR_ARRR
+ state->sane = !subvert;
return Z_OK;
#else
+ (void)subvert;
state->sane = 1;
return Z_DATA_ERROR;
#endif
}
+int ZEXPORT inflateValidate(strm, check)
+z_streamp strm;
+int check;
+{
+ struct inflate_state FAR *state;
+
+ if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
+ state = (struct inflate_state FAR *)strm->state;
+ if (check)
+ state->wrap |= 4;
+ else
+ state->wrap &= ~4;
+ return Z_OK;
+}
+
long ZEXPORT inflateMark(strm)
z_streamp strm;
{
struct inflate_state FAR *state;
- if (strm == Z_NULL || strm->state == Z_NULL) return -1L << 16;
+ if (inflateStateCheck(strm))
+ return -(1L << 16);
state = (struct inflate_state FAR *)strm->state;
- return ((long)(state->back) << 16) +
+ return (long)(((unsigned long)((long)state->back)) << 16) +
(state->mode == COPY ? state->length :
(state->mode == MATCH ? state->was - state->length : 0));
}
+
+unsigned long ZEXPORT inflateCodesUsed(strm)
+z_streamp strm;
+{
+ struct inflate_state FAR *state;
+ if (inflateStateCheck(strm)) return (unsigned long)-1;
+ state = (struct inflate_state FAR *)strm->state;
+ return (unsigned long)(state->next - state->codes);
+}
diff --git a/inflate.h b/inflate.h
index 95f4986..a46cce6 100644
--- a/inflate.h
+++ b/inflate.h
@@ -1,5 +1,5 @@
/* inflate.h -- internal inflate state definition
- * Copyright (C) 1995-2009 Mark Adler
+ * Copyright (C) 1995-2016 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@@ -18,7 +18,7 @@
/* Possible inflate modes between inflate() calls */
typedef enum {
- HEAD, /* i: waiting for magic header */
+ HEAD = 16180, /* i: waiting for magic header */
FLAGS, /* i: waiting for method and flags (gzip) */
TIME, /* i: waiting for modification time (gzip) */
OS, /* i: waiting for extra flags and operating system (gzip) */
@@ -77,11 +77,14 @@
CHECK -> LENGTH -> DONE
*/
-/* state maintained between inflate() calls. Approximately 10K bytes. */
+/* State maintained between inflate() calls -- approximately 7K bytes, not
+ including the allocated sliding window, which is up to 32K bytes. */
struct inflate_state {
+ z_streamp strm; /* pointer back to this zlib stream */
inflate_mode mode; /* current inflate mode */
int last; /* true if processing last block */
- int wrap; /* bit 0 true for zlib, bit 1 true for gzip */
+ int wrap; /* bit 0 true for zlib, bit 1 true for gzip,
+ bit 2 true to validate check value */
int havedict; /* true if dictionary provided */
int flags; /* gzip header method and flags (0 if zlib) */
unsigned dmax; /* zlib header max distance (INFLATE_STRICT) */
diff --git a/inftrees.c b/inftrees.c
index 44d89cf..2ea08fc 100644
--- a/inftrees.c
+++ b/inftrees.c
@@ -1,5 +1,5 @@
/* inftrees.c -- generate Huffman trees for efficient decoding
- * Copyright (C) 1995-2013 Mark Adler
+ * Copyright (C) 1995-2017 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@@ -9,7 +9,7 @@
#define MAXBITS 15
const char inflate_copyright[] =
- " inflate 1.2.8 Copyright 1995-2013 Mark Adler ";
+ " inflate 1.2.11 Copyright 1995-2017 Mark Adler ";
/*
If you use the zlib library in a product, an acknowledgment is welcome
in the documentation of your product. If for some reason you cannot
@@ -54,7 +54,7 @@
code FAR *next; /* next available space in table */
const unsigned short FAR *base; /* base value table to use */
const unsigned short FAR *extra; /* extra bits table to use */
- int end; /* use base and extra for symbol > end */
+ unsigned match; /* use base and extra for symbol >= match */
unsigned short count[MAXBITS+1]; /* number of codes of each length */
unsigned short offs[MAXBITS+1]; /* offsets in table for each length */
static const unsigned short lbase[31] = { /* Length codes 257..285 base */
@@ -62,7 +62,7 @@
35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0};
static const unsigned short lext[31] = { /* Length codes 257..285 extra */
16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18,
- 19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 72, 78};
+ 19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 77, 202};
static const unsigned short dbase[32] = { /* Distance codes 0..29 base */
1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
@@ -181,19 +181,17 @@
switch (type) {
case CODES:
base = extra = work; /* dummy value--not used */
- end = 19;
+ match = 20;
break;
case LENS:
base = lbase;
- base -= 257;
extra = lext;
- extra -= 257;
- end = 256;
+ match = 257;
break;
- default: /* DISTS */
+ default: /* DISTS */
base = dbase;
extra = dext;
- end = -1;
+ match = 0;
}
/* initialize state for loop */
@@ -216,13 +214,13 @@
for (;;) {
/* create table entry */
here.bits = (unsigned char)(len - drop);
- if ((int)(work[sym]) < end) {
+ if (work[sym] + 1U < match) {
here.op = (unsigned char)0;
here.val = work[sym];
}
- else if ((int)(work[sym]) > end) {
- here.op = (unsigned char)(extra[work[sym]]);
- here.val = base[work[sym]];
+ else if (work[sym] >= match) {
+ here.op = (unsigned char)(extra[work[sym] - match]);
+ here.val = base[work[sym] - match];
}
else {
here.op = (unsigned char)(32 + 64); /* end of block */
diff --git a/mozzconf.h b/mozzconf.h
deleted file mode 100644
index 10aca44..0000000
--- a/mozzconf.h
+++ /dev/null
@@ -1,186 +0,0 @@
-/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* ***** BEGIN LICENSE BLOCK *****
- * Version: MPL 1.1/GPL 2.0/LGPL 2.1
- *
- * The contents of this file are subject to the Mozilla Public License Version
- * 1.1 (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- * http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- * for the specific language governing rights and limitations under the
- * License.
- *
- * The Original Code is the mozilla zlib configuration.
- *
- * The Initial Developer of the Original Code is IBM Corporation.
- * Portions created by the Initial Developer are Copyright (C) 2004
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- *
- * Alternatively, the contents of this file may be used under the terms of
- * either of the GNU General Public License Version 2 or later (the "GPL"),
- * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
- * in which case the provisions of the GPL or the LGPL are applicable instead
- * of those above. If you wish to allow use of your version of this file only
- * under the terms of either the GPL or the LGPL, and not to allow others to
- * use your version of this file under the terms of the MPL, indicate your
- * decision by deleting the provisions above and replace them with the notice
- * and other provisions required by the GPL or the LGPL. If you do not delete
- * the provisions above, a recipient may use your version of this file under
- * the terms of any one of the MPL, the GPL or the LGPL.
- *
- * ***** END LICENSE BLOCK ***** */
-
-#ifndef MOZZCONF_H
-#define MOZZCONF_H
-
-#if defined(XP_WIN) && defined(ZLIB_DLL) && !defined(MOZ_ENABLE_LIBXUL)
-#undef ZLIB_DLL
-#endif
-
-#ifdef HAVE_VISIBILITY_ATTRIBUTE
-#define ZEXTERN __attribute__((visibility ("default"))) extern
-#endif
-
-/* Exported Symbols */
-#define zlibVersion MOZ_Z_zlibVersion
-#define deflate MOZ_Z_deflate
-#define deflateEnd MOZ_Z_deflateEnd
-#define inflate MOZ_Z_inflate
-#define inflateEnd MOZ_Z_inflateEnd
-#define deflateSetDictionary MOZ_Z_deflateSetDictionary
-#define deflateCopy MOZ_Z_deflateCopy
-#define deflateReset MOZ_Z_deflateReset
-#define deflateParams MOZ_Z_deflateParams
-#define deflateBound MOZ_Z_deflateBound
-#define deflatePrime MOZ_Z_deflatePrime
-#define inflateSetDictionary MOZ_Z_inflateSetDictionary
-#define inflateSync MOZ_Z_inflateSync
-#define inflateCopy MOZ_Z_inflateCopy
-#define inflateReset MOZ_Z_inflateReset
-#define inflateBack MOZ_Z_inflateBack
-#define inflateBackEnd MOZ_Z_inflateBackEnd
-#define zlibCompileFlags MOZ_Z_zlibCompileFlags
-#define compress MOZ_Z_compress
-#define compress2 MOZ_Z_compress2
-#define compressBound MOZ_Z_compressBound
-#define uncompress MOZ_Z_uncompress
-#define gzopen MOZ_Z_gzopen
-#define gzdopen MOZ_Z_gzdopen
-#define gzsetparams MOZ_Z_gzsetparams
-#define gzread MOZ_Z_gzread
-#define gzwrite MOZ_Z_gzwrite
-#define gzprintf MOZ_Z_gzprintf
-#define gzvprintf MOZ_Z_gzvprintf
-#define gzputs MOZ_Z_gzputs
-#define gzgets MOZ_Z_gzgets
-#define gzputc MOZ_Z_gzputc
-#define gzgetc MOZ_Z_gzgetc
-#define gzgetc_ MOZ_Z_gzgetc_
-#define gzungetc MOZ_Z_gzungetc
-#define gzflush MOZ_Z_gzflush
-#define gzseek MOZ_Z_gzseek
-#define gzrewind MOZ_Z_gzrewind
-#define gztell MOZ_Z_gztell
-#define gzeof MOZ_Z_gzeof
-#define gzclose MOZ_Z_gzclose
-#define gzerror MOZ_Z_gzerror
-#define gzclearerr MOZ_Z_gzclearerr
-#define adler32 MOZ_Z_adler32
-#define crc32 MOZ_Z_crc32
-#define deflateInit_ MOZ_Z_deflateInit_
-#define deflateInit2_ MOZ_Z_deflateInit2_
-#define inflateInit_ MOZ_Z_inflateInit_
-#define inflateInit2_ MOZ_Z_inflateInit2_
-#define inflateBackInit_ MOZ_Z_inflateBackInit_
-#define inflateSyncPoint MOZ_Z_inflateSyncPoint
-#define get_crc_table MOZ_Z_get_crc_table
-#define zError MOZ_Z_zError
-
-/* Extra global symbols */
-#define _dist_code MOZ_Z__dist_code
-#define _length_code MOZ_Z__length_code
-#define _tr_align MOZ_Z__tr_align
-#define _tr_flush_block MOZ_Z__tr_flush_block
-#define _tr_init MOZ_Z__tr_init
-#define _tr_stored_block MOZ_Z__tr_stored_block
-#define _tr_tally MOZ_Z__tr_tally
-#define deflate_copyright MOZ_Z_deflate_copyright
-#define inflate_copyright MOZ_Z_inflate_copyright
-#define inflate_fast MOZ_Z_inflate_fast
-#define inflate_table MOZ_Z_inflate_table
-#define z_errmsg MOZ_Z_z_errmsg
-#define zcalloc MOZ_Z_zcalloc
-#define zcfree MOZ_Z_zcfree
-#define alloc_func MOZ_Z_alloc_func
-#define free_func MOZ_Z_free_func
-#define in_func MOZ_Z_in_func
-#define out_func MOZ_Z_out_func
-
-/* New as of libpng-1.2.3 */
-#define adler32_combine MOZ_Z_adler32_combine
-#define crc32_combine MOZ_Z_crc32_combine
-#define deflateSetHeader MOZ_Z_deflateSetHeader
-#define deflateTune MOZ_Z_deflateTune
-#define gzdirect MOZ_Z_gzdirect
-#define inflatePrime MOZ_Z_inflatePrime
-#define inflateGetHeader MOZ_Z_inflateGetHeader
-
-/* New as of zlib 1.2.5 */
-#define gzoffset MOZ_Z_gzoffset
-#define gzopen64 MOZ_Z_gzopen64
-#define gzseek64 MOZ_Z_gzseek64
-#define gztell64 MOZ_Z_gztell64
-#define gzoffset64 MOZ_Z_gzoffset64
-#define adler32_combine64 MOZ_Z_adler32_combine64
-#define crc32_combine64 MOZ_Z_crc32_combine64
-#define gz_error MOZ_Z_gz_error
-#define gz_intmax MOZ_Z_gz_intmax
-#define gz_strwinerror MOZ_Z_gz_strwinerror
-#define gzbuffer MOZ_Z_gzbuffer
-#define gzclose_r MOZ_Z_gzclose_r
-#define gzclose_w MOZ_Z_gzclose_w
-#define inflateMark MOZ_Z_inflateMark
-#define inflateReset2 MOZ_Z_inflateReset2
-#define inflateUndermine MOZ_Z_inflateUndermine
-#define charf MOZ_Z_charf
-#define gzFile MOZ_Z_gzFile
-#define gz_header MOZ_Z_gz_header
-#define gz_headerp MOZ_Z_gz_headerp
-#define intf MOZ_Z_intf
-#define uInt MOZ_Z_uInt
-#define uIntf MOZ_Z_uIntf
-#define uLong MOZ_Z_uLong
-#define uLongf MOZ_Z_uLongf
-#define voidp MOZ_Z_voidp
-#define voidpc MOZ_Z_voidpc
-#define voidpf MOZ_Z_voidpf
-#define gz_header_s MOZ_Z_gz_header_s
-#define internal_state MOZ_Z_internal_state
-
-/* New as of zlib 1.2.8 */
-#define _tr_flush_bits MOZ_Z__tr_flush_bits
-#define deflateResetKeep MOZ_Z_deflateResetKeep
-#define deflatePending MOZ_Z_deflatePending
-#define inflateGetDictionary MOZ_Z_inflateGetDictionary
-#define inflateResetKeep MOZ_Z_inflateResetKeep
-#define gzopen_w MOZ_Z_gzopen_w
-
-/* Chromium-specific modifications */
-#define copy_with_crc MOZ_Z__copy_with_crc
-#define crc_finalize MOZ_Z__crc_finalize
-#define crc_reset MOZ_Z__crc_reset
-// read_buf used to be local, but this was changed in simd.patch.
-#define read_buf MOZ_Z__read_buf
-#define x86_check_features MOZ_Z__x86_check_features
-
-/* Mangle Byte types except on Mac. */
-#if !defined(__MACTYPES__)
-#define Byte MOZ_Z_Byte
-#define Bytef MOZ_Z_Bytef
-#endif
-
-#endif
diff --git a/names.h b/names.h
new file mode 100644
index 0000000..3436baa
--- /dev/null
+++ b/names.h
@@ -0,0 +1,167 @@
+/* Copyright 2017 The Chromium Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file. */
+
+#ifndef THIRD_PARTY_ZLIB_NAMES_H_
+#define THIRD_PARTY_ZLIB_NAMES_H_
+
+/* Rename all zlib names with a Cr_z_ prefix. This is based on the Z_PREFIX
+ * option from zconf.h, but with a custom prefix. Where zconf.h would rename
+ * both a macro and its underscore-suffixed internal implementation (such as
+ * deflateInit2 and deflateInit2_), only the implementation is renamed here.
+ * The Byte type is also omitted.
+ *
+ * To generate this list, run
+ * sed -rn -e 's/^# *define +([^ ]+) +(z_[^ ]+)$/#define \1 Cr_\2/p' zconf.h
+ * (use -E instead of -r on macOS).
+ *
+ * gzread is also addressed by modifications in gzread.c and zlib.h. */
+
+#define Z_CR_PREFIX_SET
+
+#define _dist_code Cr_z__dist_code
+#define _length_code Cr_z__length_code
+#define _tr_align Cr_z__tr_align
+#define _tr_flush_bits Cr_z__tr_flush_bits
+#define _tr_flush_block Cr_z__tr_flush_block
+#define _tr_init Cr_z__tr_init
+#define _tr_stored_block Cr_z__tr_stored_block
+#define _tr_tally Cr_z__tr_tally
+#define adler32 Cr_z_adler32
+#define adler32_combine Cr_z_adler32_combine
+#define adler32_combine64 Cr_z_adler32_combine64
+#define adler32_z Cr_z_adler32_z
+#define compress Cr_z_compress
+#define compress2 Cr_z_compress2
+#define compressBound Cr_z_compressBound
+#define crc32 Cr_z_crc32
+#define crc32_combine Cr_z_crc32_combine
+#define crc32_combine64 Cr_z_crc32_combine64
+#define crc32_z Cr_z_crc32_z
+#define deflate Cr_z_deflate
+#define deflateBound Cr_z_deflateBound
+#define deflateCopy Cr_z_deflateCopy
+#define deflateEnd Cr_z_deflateEnd
+#define deflateGetDictionary Cr_z_deflateGetDictionary
+/* #undef deflateInit */
+/* #undef deflateInit2 */
+#define deflateInit2_ Cr_z_deflateInit2_
+#define deflateInit_ Cr_z_deflateInit_
+#define deflateParams Cr_z_deflateParams
+#define deflatePending Cr_z_deflatePending
+#define deflatePrime Cr_z_deflatePrime
+#define deflateReset Cr_z_deflateReset
+#define deflateResetKeep Cr_z_deflateResetKeep
+#define deflateSetDictionary Cr_z_deflateSetDictionary
+#define deflateSetHeader Cr_z_deflateSetHeader
+#define deflateTune Cr_z_deflateTune
+#define deflate_copyright Cr_z_deflate_copyright
+#define get_crc_table Cr_z_get_crc_table
+#define gz_error Cr_z_gz_error
+#define gz_intmax Cr_z_gz_intmax
+#define gz_strwinerror Cr_z_gz_strwinerror
+#define gzbuffer Cr_z_gzbuffer
+#define gzclearerr Cr_z_gzclearerr
+#define gzclose Cr_z_gzclose
+#define gzclose_r Cr_z_gzclose_r
+#define gzclose_w Cr_z_gzclose_w
+#define gzdirect Cr_z_gzdirect
+#define gzdopen Cr_z_gzdopen
+#define gzeof Cr_z_gzeof
+#define gzerror Cr_z_gzerror
+#define gzflush Cr_z_gzflush
+#define gzfread Cr_z_gzfread
+#define gzfwrite Cr_z_gzfwrite
+#define gzgetc Cr_z_gzgetc
+#define gzgetc_ Cr_z_gzgetc_
+#define gzgets Cr_z_gzgets
+#define gzoffset Cr_z_gzoffset
+#define gzoffset64 Cr_z_gzoffset64
+#define gzopen Cr_z_gzopen
+#define gzopen64 Cr_z_gzopen64
+#define gzopen_w Cr_z_gzopen_w
+#define gzprintf Cr_z_gzprintf
+#define gzputc Cr_z_gzputc
+#define gzputs Cr_z_gzputs
+#define gzread Cr_z_gzread
+#define gzrewind Cr_z_gzrewind
+#define gzseek Cr_z_gzseek
+#define gzseek64 Cr_z_gzseek64
+#define gzsetparams Cr_z_gzsetparams
+#define gztell Cr_z_gztell
+#define gztell64 Cr_z_gztell64
+#define gzungetc Cr_z_gzungetc
+#define gzvprintf Cr_z_gzvprintf
+#define gzwrite Cr_z_gzwrite
+#define inflate Cr_z_inflate
+#define inflateBack Cr_z_inflateBack
+#define inflateBackEnd Cr_z_inflateBackEnd
+/* #undef inflateBackInit */
+#define inflateBackInit_ Cr_z_inflateBackInit_
+#define inflateCodesUsed Cr_z_inflateCodesUsed
+#define inflateCopy Cr_z_inflateCopy
+#define inflateEnd Cr_z_inflateEnd
+#define inflateGetDictionary Cr_z_inflateGetDictionary
+#define inflateGetHeader Cr_z_inflateGetHeader
+/* #undef inflateInit */
+/* #undef inflateInit2 */
+#define inflateInit2_ Cr_z_inflateInit2_
+#define inflateInit_ Cr_z_inflateInit_
+#define inflateMark Cr_z_inflateMark
+#define inflatePrime Cr_z_inflatePrime
+#define inflateReset Cr_z_inflateReset
+#define inflateReset2 Cr_z_inflateReset2
+#define inflateResetKeep Cr_z_inflateResetKeep
+#define inflateSetDictionary Cr_z_inflateSetDictionary
+#define inflateSync Cr_z_inflateSync
+#define inflateSyncPoint Cr_z_inflateSyncPoint
+#define inflateUndermine Cr_z_inflateUndermine
+#define inflateValidate Cr_z_inflateValidate
+#define inflate_copyright Cr_z_inflate_copyright
+#define inflate_fast Cr_z_inflate_fast
+#define inflate_table Cr_z_inflate_table
+#define uncompress Cr_z_uncompress
+#define uncompress2 Cr_z_uncompress2
+#define zError Cr_z_zError
+#define zcalloc Cr_z_zcalloc
+#define zcfree Cr_z_zcfree
+#define zlibCompileFlags Cr_z_zlibCompileFlags
+#define zlibVersion Cr_z_zlibVersion
+/* #undef Byte */
+#define Bytef Cr_z_Bytef
+#define alloc_func Cr_z_alloc_func
+#define charf Cr_z_charf
+#define free_func Cr_z_free_func
+#define gzFile Cr_z_gzFile
+#define gz_header Cr_z_gz_header
+#define gz_headerp Cr_z_gz_headerp
+#define in_func Cr_z_in_func
+#define intf Cr_z_intf
+#define out_func Cr_z_out_func
+#define uInt Cr_z_uInt
+#define uIntf Cr_z_uIntf
+#define uLong Cr_z_uLong
+#define uLongf Cr_z_uLongf
+#define voidp Cr_z_voidp
+#define voidpc Cr_z_voidpc
+#define voidpf Cr_z_voidpf
+#define gz_header_s Cr_z_gz_header_s
+#define internal_state Cr_z_internal_state
+/* #undef z_off64_t */
+
+/* An exported symbol that isn't handled by Z_PREFIX in zconf.h */
+#define z_errmsg Cr_z_z_errmsg
+
+/* Symbols added in simd.patch */
+#define copy_with_crc Cr_z_copy_with_crc
+#define crc_finalize Cr_z_crc_finalize
+#define crc_fold_512to32 Cr_z_crc_fold_512to32
+#define crc_fold_copy Cr_z_crc_fold_copy
+#define crc_fold_init Cr_z_crc_fold_init
+#define crc_reset Cr_z_crc_reset
+#define fill_window_sse Cr_z_fill_window_sse
+#define read_buf Cr_z_read_buf
+#define x86_check_features Cr_z_x86_check_features
+#define x86_cpu_enable_simd Cr_z_x86_cpu_enable_simd
+
+#endif /* THIRD_PARTY_ZLIB_NAMES_H_ */
diff --git a/simd.patch b/simd.patch
index c60946b..75828d2 100644
--- a/simd.patch
+++ b/simd.patch
@@ -1,7 +1,7 @@
-diff --git a/third_party/zlib/crc32.c b/third_party/zlib/crc32.c
-index 979a7190a3ca..09228ed9c76f 100644
---- a/third_party/zlib/crc32.c
-+++ b/third_party/zlib/crc32.c
+diff --git a/crc32.c b/crc32.c
+index 9580440c0e6b..9162429cc7b4 100644
+--- a/crc32.c
++++ b/crc32.c
@@ -28,6 +28,8 @@
# endif /* !DYNAMIC_CRC_TABLE */
#endif /* MAKECRCH */
@@ -10,8 +10,8 @@
+#include "x86.h"
#include "zutil.h" /* for STDC and FAR definitions */
- #define local static
-@@ -423,3 +425,28 @@ uLong ZEXPORT crc32_combine64(crc1, crc2, len2)
+ /* Definitions for doing the crc four data bytes at a time. */
+@@ -440,3 +442,28 @@ uLong ZEXPORT crc32_combine64(crc1, crc2, len2)
{
return crc32_combine_(crc1, crc2, len2);
}
@@ -40,10 +40,11 @@
+ zmemcpy(dst, strm->next_in, size);
+ strm->adler = crc32(strm->adler, dst, size);
+}
-diff --git a/third_party/zlib/crc_folding.c b/third_party/zlib/crc_folding.c
-index e69de29bb2d1..48d77744aaf4 100644
---- a/third_party/zlib/crc_folding.c
-+++ b/third_party/zlib/crc_folding.c
+diff --git a/crc_folding.c b/crc_folding.c
+new file mode 100644
+index 000000000000..48d77744aaf4
+--- /dev/null
++++ b/crc_folding.c
@@ -0,0 +1,493 @@
+/*
+ * Compute the CRC32 using a parallelized folding approach with the PCLMULQDQ
@@ -538,10 +539,10 @@
+ return ~crc;
+ CRC_SAVE(s)
+}
-diff --git a/third_party/zlib/deflate.c b/third_party/zlib/deflate.c
-index 696957705b75..02fa2f64f83e 100644
---- a/third_party/zlib/deflate.c
-+++ b/third_party/zlib/deflate.c
+diff --git a/deflate.c b/deflate.c
+index 1ec761448de9..aa0c9c67a6dc 100644
+--- a/deflate.c
++++ b/deflate.c
@@ -48,8 +48,9 @@
*/
@@ -552,23 +553,20 @@
+#include "x86.h"
const char deflate_copyright[] =
- " deflate 1.2.8 Copyright 1995-2013 Jean-loup Gailly and Mark Adler ";
-@@ -84,7 +85,7 @@ local block_state deflate_huff OF((deflate_state *s, int flush));
+ " deflate 1.2.11 Copyright 1995-2017 Jean-loup Gailly and Mark Adler ";
+@@ -86,7 +87,7 @@ local block_state deflate_huff OF((deflate_state *s, int flush));
local void lm_init OF((deflate_state *s));
local void putShortMSB OF((deflate_state *s, uInt b));
local void flush_pending OF((z_streamp strm));
--local int read_buf OF((z_streamp strm, Bytef *buf, unsigned size));
-+
+-local unsigned read_buf OF((z_streamp strm, Bytef *buf, unsigned size));
++unsigned ZLIB_INTERNAL read_buf OF((z_streamp strm, Bytef *buf, unsigned size));
#ifdef ASMV
+ # pragma message("Assembler code may have bugs -- use at your own risk")
void match_init OF((void)); /* asm code initialization */
- uInt longest_match OF((deflate_state *s, IPos cur_match));
-@@ -97,6 +98,23 @@ local void check_match OF((deflate_state *s, IPos start, IPos match,
+@@ -100,6 +101,20 @@ local void check_match OF((deflate_state *s, IPos start, IPos match,
int length));
#endif
-+/* For fill_window_sse.c to use */
-+ZLIB_INTERNAL int read_buf OF((z_streamp strm, Bytef *buf, unsigned size));
-+
+/* From crc32.c */
+extern void ZLIB_INTERNAL crc_reset(deflate_state *const s);
+extern void ZLIB_INTERNAL crc_finalize(deflate_state *const s);
@@ -586,7 +584,7 @@
/* ===========================================================================
* Local data
*/
-@@ -166,7 +184,6 @@ struct static_tree_desc_s {int dummy;}; /* for buggy compilers */
+@@ -162,7 +177,6 @@ local const config configuration_table[10] = {
*/
#define UPDATE_HASH(s,h,c) (h = (((h)<<s->hash_shift) ^ (c)) & s->hash_mask)
@@ -594,9 +592,9 @@
/* ===========================================================================
* Insert string str in the dictionary and set match_head to the previous head
* of the hash chain (the most recent string with same hash key). Return
-@@ -177,17 +194,28 @@ struct static_tree_desc_s {int dummy;}; /* for buggy compilers */
- * input characters and the first MIN_MATCH bytes of str are valid
- * (except for the last MIN_MATCH-1 bytes of the input file).
+@@ -173,17 +187,28 @@ local const config configuration_table[10] = {
+ * characters and the first MIN_MATCH bytes of str are valid (except for
+ * the last MIN_MATCH-1 bytes of the input file).
*/
+local INLINE Pos insert_string_c(deflate_state *const s, const Pos str)
+{
@@ -631,7 +629,7 @@
/* ===========================================================================
* Initialize the hash table (avoiding 64K overflow for 16 bit systems).
-@@ -221,6 +249,7 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
+@@ -248,6 +273,7 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
const char *version;
int stream_size;
{
@@ -639,7 +637,7 @@
deflate_state *s;
int wrap = 1;
static const char my_version[] = ZLIB_VERSION;
-@@ -230,6 +259,8 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
+@@ -257,6 +283,8 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
* output size for (length,distance) codes is <= 24 bits.
*/
@@ -648,11 +646,11 @@
if (version == Z_NULL || version[0] != my_version[0] ||
stream_size != sizeof(z_stream)) {
return Z_VERSION_ERROR;
-@@ -285,12 +316,17 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
+@@ -313,12 +341,19 @@ int ZEXPORT deflateInit2_(strm, level, method, windowBits, memLevel, strategy,
s->w_size = 1 << s->w_bits;
s->w_mask = s->w_size - 1;
-- s->hash_bits = memLevel + 7;
+- s->hash_bits = (uInt)memLevel + 7;
+ if (x86_cpu_enable_simd) {
+ s->hash_bits = 15;
+ } else {
@@ -664,11 +662,13 @@
s->hash_shift = ((s->hash_bits+MIN_MATCH-1)/MIN_MATCH);
- s->window = (Bytef *) ZALLOC(strm, s->w_size, 2*sizeof(Byte));
-+ s->window = (Bytef *) ZALLOC(strm, s->w_size + window_padding, 2*sizeof(Byte));
++ s->window = (Bytef *) ZALLOC(strm,
++ s->w_size + window_padding,
++ 2*sizeof(Byte));
s->prev = (Posf *) ZALLOC(strm, s->w_size, sizeof(Pos));
s->head = (Posf *) ZALLOC(strm, s->hash_size, sizeof(Pos));
-@@ -365,11 +401,7 @@ int ZEXPORT deflateSetDictionary (strm, dictionary, dictLength)
+@@ -418,11 +453,7 @@ int ZEXPORT deflateSetDictionary (strm, dictionary, dictLength)
str = s->strstart;
n = s->lookahead - (MIN_MATCH-1);
do {
@@ -681,16 +681,16 @@
str++;
} while (--n);
s->strstart = str;
-@@ -690,7 +722,7 @@ int ZEXPORT deflate (strm, flush)
- if (s->status == INIT_STATE) {
+@@ -848,7 +879,7 @@ int ZEXPORT deflate (strm, flush)
#ifdef GZIP
- if (s->wrap == 2) {
-- strm->adler = crc32(0L, Z_NULL, 0);
-+ crc_reset(s);
- put_byte(s, 31);
- put_byte(s, 139);
- put_byte(s, 8);
-@@ -952,6 +984,7 @@ int ZEXPORT deflate (strm, flush)
+ if (s->status == GZIP_STATE) {
+ /* gzip header */
+- strm->adler = crc32(0L, Z_NULL, 0);
++ crc_reset(s);
+ put_byte(s, 31);
+ put_byte(s, 139);
+ put_byte(s, 8);
+@@ -1049,6 +1080,7 @@ int ZEXPORT deflate (strm, flush)
/* Write the trailer */
#ifdef GZIP
if (s->wrap == 2) {
@@ -698,16 +698,16 @@
put_byte(s, (Byte)(strm->adler & 0xff));
put_byte(s, (Byte)((strm->adler >> 8) & 0xff));
put_byte(s, (Byte)((strm->adler >> 16) & 0xff));
-@@ -1073,7 +1106,7 @@ int ZEXPORT deflateCopy (dest, source)
+@@ -1161,7 +1193,7 @@ int ZEXPORT deflateCopy (dest, source)
* allocating a large strm->next_in buffer and copying from it.
* (See also flush_pending()).
*/
--local int read_buf(strm, buf, size)
-+ZLIB_INTERNAL int read_buf(strm, buf, size)
+-local unsigned read_buf(strm, buf, size)
++ZLIB_INTERNAL unsigned read_buf(strm, buf, size)
z_streamp strm;
Bytef *buf;
unsigned size;
-@@ -1085,15 +1118,16 @@ local int read_buf(strm, buf, size)
+@@ -1173,15 +1205,16 @@ local unsigned read_buf(strm, buf, size)
strm->avail_in -= len;
@@ -731,7 +731,7 @@
strm->next_in += len;
strm->total_in += len;
-@@ -1387,7 +1421,19 @@ local void check_match(s, start, match, length)
+@@ -1479,7 +1512,19 @@ local void check_match(s, start, match, length)
* performed for at least two bytes (required for the zip translate_eol
* option -- not supported here).
*/
@@ -751,8 +751,8 @@
+local void fill_window_c(s)
deflate_state *s;
{
- register unsigned n, m;
-@@ -1651,7 +1697,7 @@ local block_state deflate_fast(s, flush)
+ unsigned n;
+@@ -1847,7 +1892,7 @@ local block_state deflate_fast(s, flush)
*/
hash_head = NIL;
if (s->lookahead >= MIN_MATCH) {
@@ -761,7 +761,7 @@
}
/* Find the longest match, discarding those <= prev_length.
-@@ -1682,7 +1728,7 @@ local block_state deflate_fast(s, flush)
+@@ -1878,7 +1923,7 @@ local block_state deflate_fast(s, flush)
s->match_length--; /* string at strstart already in table */
do {
s->strstart++;
@@ -770,7 +770,7 @@
/* strstart never exceeds WSIZE-MAX_MATCH, so there are
* always MIN_MATCH bytes ahead.
*/
-@@ -1754,7 +1800,7 @@ local block_state deflate_slow(s, flush)
+@@ -1950,7 +1995,7 @@ local block_state deflate_slow(s, flush)
*/
hash_head = NIL;
if (s->lookahead >= MIN_MATCH) {
@@ -779,7 +779,7 @@
}
/* Find the longest match, discarding those <= prev_length.
-@@ -1805,7 +1851,7 @@ local block_state deflate_slow(s, flush)
+@@ -2001,7 +2046,7 @@ local block_state deflate_slow(s, flush)
s->prev_length -= 2;
do {
if (++s->strstart <= max_insert) {
@@ -788,7 +788,7 @@
}
} while (--s->prev_length != 0);
s->match_available = 0;
-@@ -1965,3 +2011,37 @@ local block_state deflate_huff(s, flush)
+@@ -2161,3 +2206,37 @@ local block_state deflate_huff(s, flush)
FLUSH_BLOCK(s, 0);
return block_done;
}
@@ -826,12 +826,12 @@
+ s->prev[str & s->w_mask] = ret;
+ return ret;
+}
-diff --git a/third_party/zlib/deflate.h b/third_party/zlib/deflate.h
-index ce0299edd191..022d9c326ecc 100644
---- a/third_party/zlib/deflate.h
-+++ b/third_party/zlib/deflate.h
-@@ -106,7 +106,7 @@ typedef struct internal_state {
- uInt gzindex; /* where in extra, name, or comment */
+diff --git a/deflate.h b/deflate.h
+index 23ecdd312bc0..ab56df7663b6 100644
+--- a/deflate.h
++++ b/deflate.h
+@@ -109,7 +109,7 @@ typedef struct internal_state {
+ ulg gzindex; /* where in extra, name, or comment */
Byte method; /* can only be DEFLATED */
int last_flush; /* value of flush param for previous deflate call */
-
@@ -839,7 +839,7 @@
/* used by deflate.c: */
uInt w_size; /* LZ77 window size (32K by default) */
-@@ -343,4 +343,14 @@ void ZLIB_INTERNAL _tr_stored_block OF((deflate_state *s, charf *buf,
+@@ -346,4 +346,14 @@ void ZLIB_INTERNAL _tr_stored_block OF((deflate_state *s, charf *buf,
flush = _tr_tally(s, distance, length)
#endif
@@ -854,10 +854,11 @@
+void ZLIB_INTERNAL fill_window_sse(deflate_state* s);
+
#endif /* DEFLATE_H */
-diff --git a/third_party/zlib/fill_window_sse.c b/third_party/zlib/fill_window_sse.c
-index e69de29bb2d1..949ccce1ba9c 100644
---- a/third_party/zlib/fill_window_sse.c
-+++ b/third_party/zlib/fill_window_sse.c
+diff --git a/fill_window_sse.c b/fill_window_sse.c
+new file mode 100644
+index 000000000000..949ccce1ba9c
+--- /dev/null
++++ b/fill_window_sse.c
@@ -0,0 +1,175 @@
+/*
+ * Fill Window with SSE2-optimized hash shifting
@@ -1034,29 +1035,32 @@
+ Assert((ulg)s->strstart <= s->window_size - MIN_LOOKAHEAD,
+ "not enough room for search");
+}
-diff --git a/third_party/zlib/mozzconf.h b/third_party/zlib/mozzconf.h
-index d7e9f91c5a12..10aca44b29a4 100644
---- a/third_party/zlib/mozzconf.h
-+++ b/third_party/zlib/mozzconf.h
-@@ -169,6 +169,14 @@
- #define inflateResetKeep MOZ_Z_inflateResetKeep
- #define gzopen_w MOZ_Z_gzopen_w
+diff --git a/names.h b/names.h
+index f18df5684dc5..3436baa4eb57 100644
+--- a/names.h
++++ b/names.h
+@@ -152,4 +152,16 @@
+ /* An exported symbol that isn't handled by Z_PREFIX in zconf.h */
+ #define z_errmsg Cr_z_z_errmsg
-+/* Chromium-specific modifications */
-+#define copy_with_crc MOZ_Z__copy_with_crc
-+#define crc_finalize MOZ_Z__crc_finalize
-+#define crc_reset MOZ_Z__crc_reset
-+// read_buf used to be local, but this was changed in simd.patch.
-+#define read_buf MOZ_Z__read_buf
-+#define x86_check_features MOZ_Z__x86_check_features
++/* Symbols added in simd.patch */
++#define copy_with_crc Cr_z_copy_with_crc
++#define crc_finalize Cr_z_crc_finalize
++#define crc_fold_512to32 Cr_z_crc_fold_512to32
++#define crc_fold_copy Cr_z_crc_fold_copy
++#define crc_fold_init Cr_z_crc_fold_init
++#define crc_reset Cr_z_crc_reset
++#define fill_window_sse Cr_z_fill_window_sse
++#define read_buf Cr_z_read_buf
++#define x86_check_features Cr_z_x86_check_features
++#define x86_cpu_enable_simd Cr_z_x86_cpu_enable_simd
+
- /* Mangle Byte types except on Mac. */
- #if !defined(__MACTYPES__)
- #define Byte MOZ_Z_Byte
-diff --git a/third_party/zlib/simd_stub.c b/third_party/zlib/simd_stub.c
-index e69de29bb2d1..796f1f63f690 100644
---- a/third_party/zlib/simd_stub.c
-+++ b/third_party/zlib/simd_stub.c
+ #endif /* THIRD_PARTY_ZLIB_NAMES_H_ */
+diff --git a/simd_stub.c b/simd_stub.c
+new file mode 100644
+index 000000000000..c6d46051498f
+--- /dev/null
++++ b/simd_stub.c
@@ -0,0 +1,35 @@
+/* simd_stub.c -- stub implementations
+* Copyright (C) 2014 Intel Corporation
@@ -1067,7 +1071,7 @@
+#include "deflate.h"
+#include "x86.h"
+
-+int x86_cpu_enable_simd = 0;
++int ZLIB_INTERNAL x86_cpu_enable_simd = 0;
+
+void ZLIB_INTERNAL crc_fold_init(deflate_state *const s) {
+ assert(0);
@@ -1093,11 +1097,12 @@
+void x86_check_features(void)
+{
+}
-diff --git a/third_party/zlib/x86.c b/third_party/zlib/x86.c
-index e69de29bb2d1..e6532fd10ddb 100644
---- a/third_party/zlib/x86.c
-+++ b/third_party/zlib/x86.c
-@@ -0,0 +1,91 @@
+diff --git a/x86.c b/x86.c
+new file mode 100644
+index 000000000000..e56fe8b85a39
+--- /dev/null
++++ b/x86.c
+@@ -0,0 +1,92 @@
+/*
+ * x86 feature check
+ *
@@ -1109,8 +1114,9 @@
+ */
+
+#include "x86.h"
++#include "zutil.h"
+
-+int x86_cpu_enable_simd = 0;
++int ZLIB_INTERNAL x86_cpu_enable_simd = 0;
+
+#ifndef _MSC_VER
+#include <pthread.h>
@@ -1189,10 +1195,11 @@
+ return TRUE;
+}
+#endif /* _MSC_VER */
-diff --git a/third_party/zlib/x86.h b/third_party/zlib/x86.h
-index e69de29bb2d1..ebcf10ab09d2 100644
---- a/third_party/zlib/x86.h
-+++ b/third_party/zlib/x86.h
+diff --git a/x86.h b/x86.h
+new file mode 100644
+index 000000000000..ebcf10ab09d2
+--- /dev/null
++++ b/x86.h
@@ -0,0 +1,15 @@
+/* x86.h -- check for x86 CPU features
+* Copyright (C) 2013 Intel Corporation Jim Kukunas
@@ -1209,3 +1216,18 @@
+void x86_check_features(void);
+
+#endif /* X86_H */
+diff --git a/zutil.h b/zutil.h
+index 80375b8b6109..4425bcf75eb3 100644
+--- a/zutil.h
++++ b/zutil.h
+@@ -283,4 +283,10 @@ extern z_const char * const z_errmsg[10]; /* indexed by 2-zlib_error */
+ #define ZSWAP32(q) ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \
+ (((q) & 0xff00) << 8) + (((q) & 0xff) << 24))
+
++#ifdef _MSC_VER
++#define zalign(x) __declspec(align(x))
++#else
++#define zalign(x) __attribute__((aligned((x))))
++#endif
++
+ #endif /* ZUTIL_H */
diff --git a/simd_stub.c b/simd_stub.c
index 796f1f6..c6d4605 100644
--- a/simd_stub.c
+++ b/simd_stub.c
@@ -7,7 +7,7 @@
#include "deflate.h"
#include "x86.h"
-int x86_cpu_enable_simd = 0;
+int ZLIB_INTERNAL x86_cpu_enable_simd = 0;
void ZLIB_INTERNAL crc_fold_init(deflate_state *const s) {
assert(0);
diff --git a/trees.c b/trees.c
index 1fd7759..50cf4b4 100644
--- a/trees.c
+++ b/trees.c
@@ -1,5 +1,5 @@
/* trees.c -- output deflated data using Huffman coding
- * Copyright (C) 1995-2012 Jean-loup Gailly
+ * Copyright (C) 1995-2017 Jean-loup Gailly
* detect_data_type() function provided freely by Cosmin Truta, 2006
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@@ -36,7 +36,7 @@
#include "deflate.h"
-#ifdef DEBUG
+#ifdef ZLIB_DEBUG
# include <ctype.h>
#endif
@@ -122,13 +122,13 @@
int max_length; /* max bit length for the codes */
};
-local static_tree_desc static_l_desc =
+local const static_tree_desc static_l_desc =
{static_ltree, extra_lbits, LITERALS+1, L_CODES, MAX_BITS};
-local static_tree_desc static_d_desc =
+local const static_tree_desc static_d_desc =
{static_dtree, extra_dbits, 0, D_CODES, MAX_BITS};
-local static_tree_desc static_bl_desc =
+local const static_tree_desc static_bl_desc =
{(const ct_data *)0, extra_blbits, 0, BL_CODES, MAX_BL_BITS};
/* ===========================================================================
@@ -152,18 +152,16 @@
local unsigned bi_reverse OF((unsigned value, int length));
local void bi_windup OF((deflate_state *s));
local void bi_flush OF((deflate_state *s));
-local void copy_block OF((deflate_state *s, charf *buf, unsigned len,
- int header));
#ifdef GEN_TREES_H
local void gen_trees_header OF((void));
#endif
-#ifndef DEBUG
+#ifndef ZLIB_DEBUG
# define send_code(s, c, tree) send_bits(s, tree[c].Code, tree[c].Len)
/* Send a code of the given tree. c and tree must not have side effects */
-#else /* DEBUG */
+#else /* !ZLIB_DEBUG */
# define send_code(s, c, tree) \
{ if (z_verbose>2) fprintf(stderr,"\ncd %3d ",(c)); \
send_bits(s, tree[c].Code, tree[c].Len); }
@@ -182,7 +180,7 @@
* Send a value on a given number of bits.
* IN assertion: length <= 16 and value fits in length bits.
*/
-#ifdef DEBUG
+#ifdef ZLIB_DEBUG
local void send_bits OF((deflate_state *s, int value, int length));
local void send_bits(s, value, length)
@@ -208,12 +206,12 @@
s->bi_valid += length;
}
}
-#else /* !DEBUG */
+#else /* !ZLIB_DEBUG */
#define send_bits(s, value, length) \
{ int len = length;\
if (s->bi_valid > (int)Buf_size - len) {\
- int val = value;\
+ int val = (int)value;\
s->bi_buf |= (ush)val << s->bi_valid;\
put_short(s, s->bi_buf);\
s->bi_buf = (ush)val >> (Buf_size - s->bi_valid);\
@@ -223,7 +221,7 @@
s->bi_valid += len;\
}\
}
-#endif /* DEBUG */
+#endif /* ZLIB_DEBUG */
/* the arguments must not have side effects */
@@ -317,7 +315,7 @@
* Genererate the file trees.h describing the static trees.
*/
#ifdef GEN_TREES_H
-# ifndef DEBUG
+# ifndef ZLIB_DEBUG
# include <stdio.h>
# endif
@@ -394,7 +392,7 @@
s->bi_buf = 0;
s->bi_valid = 0;
-#ifdef DEBUG
+#ifdef ZLIB_DEBUG
s->compressed_len = 0L;
s->bits_sent = 0L;
#endif
@@ -522,12 +520,12 @@
xbits = 0;
if (n >= base) xbits = extra[n-base];
f = tree[n].Freq;
- s->opt_len += (ulg)f * (bits + xbits);
- if (stree) s->static_len += (ulg)f * (stree[n].Len + xbits);
+ s->opt_len += (ulg)f * (unsigned)(bits + xbits);
+ if (stree) s->static_len += (ulg)f * (unsigned)(stree[n].Len + xbits);
}
if (overflow == 0) return;
- Trace((stderr,"\nbit length overflow\n"));
+ Tracev((stderr,"\nbit length overflow\n"));
/* This happens for example on obj2 and pic of the Calgary corpus */
/* Find the first bit length which could increase: */
@@ -554,9 +552,8 @@
m = s->heap[--h];
if (m > max_code) continue;
if ((unsigned) tree[m].Len != (unsigned) bits) {
- Trace((stderr,"code %d bits %d->%d\n", m, tree[m].Len, bits));
- s->opt_len += ((long)bits - (long)tree[m].Len)
- *(long)tree[m].Freq;
+ Tracev((stderr,"code %d bits %d->%d\n", m, tree[m].Len, bits));
+ s->opt_len += ((ulg)bits - tree[m].Len) * tree[m].Freq;
tree[m].Len = (ush)bits;
}
n--;
@@ -578,7 +575,7 @@
ushf *bl_count; /* number of codes at each bit length */
{
ush next_code[MAX_BITS+1]; /* next code value for each bit length */
- ush code = 0; /* running code value */
+ unsigned code = 0; /* running code value */
int bits; /* bit index */
int n; /* code index */
@@ -586,7 +583,8 @@
* without bit reversal.
*/
for (bits = 1; bits <= MAX_BITS; bits++) {
- next_code[bits] = code = (code + bl_count[bits-1]) << 1;
+ code = (code + bl_count[bits-1]) << 1;
+ next_code[bits] = (ush)code;
}
/* Check that the bit counts in bl_count are consistent. The last code
* must be all ones.
@@ -599,7 +597,7 @@
int len = tree[n].Len;
if (len == 0) continue;
/* Now reverse the bits */
- tree[n].Code = bi_reverse(next_code[len]++, len);
+ tree[n].Code = (ush)bi_reverse(next_code[len]++, len);
Tracecv(tree != static_ltree, (stderr,"\nn %3d %c l %2d c %4x (%x) ",
n, (isgraph(n) ? n : ' '), len, tree[n].Code, next_code[len]-1));
@@ -821,7 +819,7 @@
if (s->bl_tree[bl_order[max_blindex]].Len != 0) break;
}
/* Update opt_len to include the bit length tree and counts */
- s->opt_len += 3*(max_blindex+1) + 5+5+4;
+ s->opt_len += 3*((ulg)max_blindex+1) + 5+5+4;
Tracev((stderr, "\ndyn trees: dyn %ld, stat %ld",
s->opt_len, s->static_len));
@@ -869,11 +867,17 @@
int last; /* one if this is the last block for a file */
{
send_bits(s, (STORED_BLOCK<<1)+last, 3); /* send block type */
-#ifdef DEBUG
+ bi_windup(s); /* align on byte boundary */
+ put_short(s, (ush)stored_len);
+ put_short(s, (ush)~stored_len);
+ zmemcpy(s->pending_buf + s->pending, (Bytef *)buf, stored_len);
+ s->pending += stored_len;
+#ifdef ZLIB_DEBUG
s->compressed_len = (s->compressed_len + 3 + 7) & (ulg)~7L;
s->compressed_len += (stored_len + 4) << 3;
+ s->bits_sent += 2*16;
+ s->bits_sent += stored_len<<3;
#endif
- copy_block(s, buf, (unsigned)stored_len, 1); /* with header */
}
/* ===========================================================================
@@ -894,7 +898,7 @@
{
send_bits(s, STATIC_TREES<<1, 3);
send_code(s, END_BLOCK, static_ltree);
-#ifdef DEBUG
+#ifdef ZLIB_DEBUG
s->compressed_len += 10L; /* 3 for block type, 7 for EOB */
#endif
bi_flush(s);
@@ -902,7 +906,7 @@
/* ===========================================================================
* Determine the best encoding for the current block: dynamic trees, static
- * trees or store, and output the encoded block to the zip file.
+ * trees or store, and write out the encoded block.
*/
void ZLIB_INTERNAL _tr_flush_block(s, buf, stored_len, last)
deflate_state *s;
@@ -974,7 +978,7 @@
send_bits(s, (STATIC_TREES<<1)+last, 3);
compress_block(s, (const ct_data *)static_ltree,
(const ct_data *)static_dtree);
-#ifdef DEBUG
+#ifdef ZLIB_DEBUG
s->compressed_len += 3 + s->static_len;
#endif
} else {
@@ -983,7 +987,7 @@
max_blindex+1);
compress_block(s, (const ct_data *)s->dyn_ltree,
(const ct_data *)s->dyn_dtree);
-#ifdef DEBUG
+#ifdef ZLIB_DEBUG
s->compressed_len += 3 + s->opt_len;
#endif
}
@@ -995,7 +999,7 @@
if (last) {
bi_windup(s);
-#ifdef DEBUG
+#ifdef ZLIB_DEBUG
s->compressed_len += 7; /* align on byte boundary */
#endif
}
@@ -1090,7 +1094,7 @@
send_code(s, code, dtree); /* send the distance code */
extra = extra_dbits[code];
if (extra != 0) {
- dist -= base_dist[code];
+ dist -= (unsigned)base_dist[code];
send_bits(s, dist, extra); /* send the extra distance bits */
}
} /* literal or match pair ? */
@@ -1193,34 +1197,7 @@
}
s->bi_buf = 0;
s->bi_valid = 0;
-#ifdef DEBUG
+#ifdef ZLIB_DEBUG
s->bits_sent = (s->bits_sent+7) & ~7;
#endif
}
-
-/* ===========================================================================
- * Copy a stored block, storing first the length and its
- * one's complement if requested.
- */
-local void copy_block(s, buf, len, header)
- deflate_state *s;
- charf *buf; /* the input data */
- unsigned len; /* its length */
- int header; /* true if block header must be written */
-{
- bi_windup(s); /* align on byte boundary */
-
- if (header) {
- put_short(s, (ush)len);
- put_short(s, (ush)~len);
-#ifdef DEBUG
- s->bits_sent += 2*16;
-#endif
- }
-#ifdef DEBUG
- s->bits_sent += (ulg)len<<3;
-#endif
- while (len--) {
- put_byte(s, *buf++);
- }
-}
diff --git a/uncompr.c b/uncompr.c
index 242e949..f03a1a8 100644
--- a/uncompr.c
+++ b/uncompr.c
@@ -1,5 +1,5 @@
/* uncompr.c -- decompress a memory buffer
- * Copyright (C) 1995-2003, 2010 Jean-loup Gailly.
+ * Copyright (C) 1995-2003, 2010, 2014, 2016 Jean-loup Gailly, Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@@ -9,51 +9,85 @@
#include "zlib.h"
/* ===========================================================================
- Decompresses the source buffer into the destination buffer. sourceLen is
- the byte length of the source buffer. Upon entry, destLen is the total
- size of the destination buffer, which must be large enough to hold the
- entire uncompressed data. (The size of the uncompressed data must have
- been saved previously by the compressor and transmitted to the decompressor
- by some mechanism outside the scope of this compression library.)
- Upon exit, destLen is the actual size of the compressed buffer.
+ Decompresses the source buffer into the destination buffer. *sourceLen is
+ the byte length of the source buffer. Upon entry, *destLen is the total size
+ of the destination buffer, which must be large enough to hold the entire
+ uncompressed data. (The size of the uncompressed data must have been saved
+ previously by the compressor and transmitted to the decompressor by some
+ mechanism outside the scope of this compression library.) Upon exit,
+ *destLen is the size of the decompressed data and *sourceLen is the number
+ of source bytes consumed. Upon return, source + *sourceLen points to the
+ first unused input byte.
- uncompress returns Z_OK if success, Z_MEM_ERROR if there was not
- enough memory, Z_BUF_ERROR if there was not enough room in the output
- buffer, or Z_DATA_ERROR if the input data was corrupted.
+ uncompress returns Z_OK if success, Z_MEM_ERROR if there was not enough
+ memory, Z_BUF_ERROR if there was not enough room in the output buffer, or
+ Z_DATA_ERROR if the input data was corrupted, including if the input data is
+ an incomplete zlib stream.
*/
+int ZEXPORT uncompress2 (dest, destLen, source, sourceLen)
+ Bytef *dest;
+ uLongf *destLen;
+ const Bytef *source;
+ uLong *sourceLen;
+{
+ z_stream stream;
+ int err;
+ const uInt max = (uInt)-1;
+ uLong len, left;
+ Byte buf[1]; /* for detection of incomplete stream when *destLen == 0 */
+
+ len = *sourceLen;
+ if (*destLen) {
+ left = *destLen;
+ *destLen = 0;
+ }
+ else {
+ left = 1;
+ dest = buf;
+ }
+
+ stream.next_in = (z_const Bytef *)source;
+ stream.avail_in = 0;
+ stream.zalloc = (alloc_func)0;
+ stream.zfree = (free_func)0;
+ stream.opaque = (voidpf)0;
+
+ err = inflateInit(&stream);
+ if (err != Z_OK) return err;
+
+ stream.next_out = dest;
+ stream.avail_out = 0;
+
+ do {
+ if (stream.avail_out == 0) {
+ stream.avail_out = left > (uLong)max ? max : (uInt)left;
+ left -= stream.avail_out;
+ }
+ if (stream.avail_in == 0) {
+ stream.avail_in = len > (uLong)max ? max : (uInt)len;
+ len -= stream.avail_in;
+ }
+ err = inflate(&stream, Z_NO_FLUSH);
+ } while (err == Z_OK);
+
+ *sourceLen -= len + stream.avail_in;
+ if (dest != buf)
+ *destLen = stream.total_out;
+ else if (stream.total_out && err == Z_BUF_ERROR)
+ left = 1;
+
+ inflateEnd(&stream);
+ return err == Z_STREAM_END ? Z_OK :
+ err == Z_NEED_DICT ? Z_DATA_ERROR :
+ err == Z_BUF_ERROR && left + stream.avail_out ? Z_DATA_ERROR :
+ err;
+}
+
int ZEXPORT uncompress (dest, destLen, source, sourceLen)
Bytef *dest;
uLongf *destLen;
const Bytef *source;
uLong sourceLen;
{
- z_stream stream;
- int err;
-
- stream.next_in = (z_const Bytef *)source;
- stream.avail_in = (uInt)sourceLen;
- /* Check for source > 64K on 16-bit machine: */
- if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR;
-
- stream.next_out = dest;
- stream.avail_out = (uInt)*destLen;
- if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR;
-
- stream.zalloc = (alloc_func)0;
- stream.zfree = (free_func)0;
-
- err = inflateInit(&stream);
- if (err != Z_OK) return err;
-
- err = inflate(&stream, Z_FINISH);
- if (err != Z_STREAM_END) {
- inflateEnd(&stream);
- if (err == Z_NEED_DICT || (err == Z_BUF_ERROR && stream.avail_in == 0))
- return Z_DATA_ERROR;
- return err;
- }
- *destLen = stream.total_out;
-
- err = inflateEnd(&stream);
- return err;
+ return uncompress2(dest, destLen, source, &sourceLen);
}
diff --git a/x86.c b/x86.c
index e6532fd..e56fe8b 100644
--- a/x86.c
+++ b/x86.c
@@ -9,8 +9,9 @@
*/
#include "x86.h"
+#include "zutil.h"
-int x86_cpu_enable_simd = 0;
+int ZLIB_INTERNAL x86_cpu_enable_simd = 0;
#ifndef _MSC_VER
#include <pthread.h>
diff --git a/zconf.h b/zconf.h
index 1b1d88b..a7a815f 100644
--- a/zconf.h
+++ b/zconf.h
@@ -1,5 +1,5 @@
/* zconf.h -- configuration of the zlib compression library
- * Copyright (C) 1995-2013 Jean-loup Gailly.
+ * Copyright (C) 1995-2016 Jean-loup Gailly, Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@@ -9,7 +9,7 @@
#define ZCONF_H
/* This include does prefixing as below, but with an updated set of names */
-#include "mozzconf.h"
+#include "names.h"
/*
* If you *really* need a unique prefix for all types and library functions,
@@ -20,7 +20,7 @@
#ifdef Z_PREFIX /* may be set to #if 1 by ./configure */
# define Z_PREFIX_SET
-/* all linked symbols */
+/* all linked symbols and init macros */
# define _dist_code z__dist_code
# define _length_code z__length_code
# define _tr_align z__tr_align
@@ -32,6 +32,7 @@
# define adler32 z_adler32
# define adler32_combine z_adler32_combine
# define adler32_combine64 z_adler32_combine64
+# define adler32_z z_adler32_z
# ifndef Z_SOLO
# define compress z_compress
# define compress2 z_compress2
@@ -40,10 +41,14 @@
# define crc32 z_crc32
# define crc32_combine z_crc32_combine
# define crc32_combine64 z_crc32_combine64
+# define crc32_z z_crc32_z
# define deflate z_deflate
# define deflateBound z_deflateBound
# define deflateCopy z_deflateCopy
# define deflateEnd z_deflateEnd
+# define deflateGetDictionary z_deflateGetDictionary
+# define deflateInit z_deflateInit
+# define deflateInit2 z_deflateInit2
# define deflateInit2_ z_deflateInit2_
# define deflateInit_ z_deflateInit_
# define deflateParams z_deflateParams
@@ -70,6 +75,8 @@
# define gzeof z_gzeof
# define gzerror z_gzerror
# define gzflush z_gzflush
+# define gzfread z_gzfread
+# define gzfwrite z_gzfwrite
# define gzgetc z_gzgetc
# define gzgetc_ z_gzgetc_
# define gzgets z_gzgets
@@ -81,7 +88,6 @@
# define gzopen_w z_gzopen_w
# endif
# define gzprintf z_gzprintf
-# define gzvprintf z_gzvprintf
# define gzputc z_gzputc
# define gzputs z_gzputs
# define gzread z_gzread
@@ -92,32 +98,39 @@
# define gztell z_gztell
# define gztell64 z_gztell64
# define gzungetc z_gzungetc
+# define gzvprintf z_gzvprintf
# define gzwrite z_gzwrite
# endif
# define inflate z_inflate
# define inflateBack z_inflateBack
# define inflateBackEnd z_inflateBackEnd
+# define inflateBackInit z_inflateBackInit
# define inflateBackInit_ z_inflateBackInit_
+# define inflateCodesUsed z_inflateCodesUsed
# define inflateCopy z_inflateCopy
# define inflateEnd z_inflateEnd
+# define inflateGetDictionary z_inflateGetDictionary
# define inflateGetHeader z_inflateGetHeader
+# define inflateInit z_inflateInit
+# define inflateInit2 z_inflateInit2
# define inflateInit2_ z_inflateInit2_
# define inflateInit_ z_inflateInit_
# define inflateMark z_inflateMark
# define inflatePrime z_inflatePrime
# define inflateReset z_inflateReset
# define inflateReset2 z_inflateReset2
+# define inflateResetKeep z_inflateResetKeep
# define inflateSetDictionary z_inflateSetDictionary
-# define inflateGetDictionary z_inflateGetDictionary
# define inflateSync z_inflateSync
# define inflateSyncPoint z_inflateSyncPoint
# define inflateUndermine z_inflateUndermine
-# define inflateResetKeep z_inflateResetKeep
+# define inflateValidate z_inflateValidate
# define inflate_copyright z_inflate_copyright
# define inflate_fast z_inflate_fast
# define inflate_table z_inflate_table
# ifndef Z_SOLO
# define uncompress z_uncompress
+# define uncompress2 z_uncompress2
# endif
# define zError z_zError
# ifndef Z_SOLO
@@ -227,9 +240,19 @@
# define z_const
#endif
-/* Some Mac compilers merge all .h files incorrectly: */
-#if defined(__MWERKS__)||defined(applec)||defined(THINK_C)||defined(__SC__)
-# define NO_DUMMY_DECL
+#ifdef Z_SOLO
+ typedef unsigned long z_size_t;
+#else
+# define z_longlong long long
+# if defined(NO_SIZE_T)
+ typedef unsigned NO_SIZE_T z_size_t;
+# elif defined(STDC)
+# include <stddef.h>
+ typedef size_t z_size_t;
+# else
+ typedef unsigned long z_size_t;
+# endif
+# undef z_longlong
#endif
/* Maximum value for memLevel in deflateInit2 */
@@ -259,7 +282,7 @@
Of course this will generally degrade compression (there's no free lunch).
The memory requirements for inflate are (in bytes) 1 << windowBits
- that is, 32K for windowBits=15 (default value) plus a few kilobytes
+ that is, 32K for windowBits=15 (default value) plus about 7 kilobytes
for small objects.
*/
diff --git a/zlib.h b/zlib.h
index 36c73af..99fd467 100644
--- a/zlib.h
+++ b/zlib.h
@@ -1,7 +1,7 @@
/* zlib.h -- interface of the 'zlib' general purpose compression library
- version 1.2.8, April 28th, 2013
+ version 1.2.11, January 15th, 2017
- Copyright (C) 1995-2013 Jean-loup Gailly and Mark Adler
+ Copyright (C) 1995-2017 Jean-loup Gailly and Mark Adler
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
@@ -37,11 +37,11 @@
extern "C" {
#endif
-#define ZLIB_VERSION "1.2.8"
-#define ZLIB_VERNUM 0x1280
+#define ZLIB_VERSION "1.2.11"
+#define ZLIB_VERNUM 0x12b0
#define ZLIB_VER_MAJOR 1
#define ZLIB_VER_MINOR 2
-#define ZLIB_VER_REVISION 8
+#define ZLIB_VER_REVISION 11
#define ZLIB_VER_SUBREVISION 0
/*
@@ -65,7 +65,8 @@
with "gz". The gzip format is different from the zlib format. gzip is a
gzip wrapper, documented in RFC 1952, wrapped around a deflate stream.
- This library can optionally read and write gzip streams in memory as well.
+ This library can optionally read and write gzip and raw deflate streams in
+ memory as well.
The zlib format was designed to be compact and fast for use in memory
and on communications channels. The gzip format was designed for single-
@@ -74,7 +75,7 @@
The library does not install any signal handler. The decoder checks
the consistency of the compressed data, so the library should never crash
- even in case of corrupted input.
+ even in the case of corrupted input.
*/
typedef voidpf (*alloc_func) OF((voidpf opaque, uInt items, uInt size));
@@ -87,7 +88,7 @@
uInt avail_in; /* number of bytes available at next_in */
uLong total_in; /* total number of input bytes read so far */
- Bytef *next_out; /* next output byte should be put there */
+ Bytef *next_out; /* next output byte will go here */
uInt avail_out; /* remaining free space at next_out */
uLong total_out; /* total number of bytes output so far */
@@ -98,8 +99,9 @@
free_func zfree; /* used to free the internal state */
voidpf opaque; /* private data object passed to zalloc and zfree */
- int data_type; /* best guess about the data type: binary or text */
- uLong adler; /* adler32 value of the uncompressed data */
+ int data_type; /* best guess about the data type: binary or text
+ for deflate, or the decoding state for inflate */
+ uLong adler; /* Adler-32 or CRC-32 value of the uncompressed data */
uLong reserved; /* reserved for future use */
} z_stream;
@@ -142,7 +144,9 @@
zalloc must return Z_NULL if there is not enough memory for the object.
If zlib is used in a multi-threaded application, zalloc and zfree must be
- thread safe.
+ thread safe. In that case, zlib is thread-safe. When zalloc and zfree are
+ Z_NULL on entry to the initialization function, they are set to internal
+ routines that use the standard library functions malloc() and free().
On 16-bit systems, the functions zalloc and zfree must be able to allocate
exactly 65536 bytes, but will not be required to allocate more than this if
@@ -155,7 +159,7 @@
The fields total_in and total_out can be used for statistics or progress
reports. After compression, total_in holds the total size of the
- uncompressed data and may be saved for use in the decompressor (particularly
+ uncompressed data and may be saved for use by the decompressor (particularly
if the decompressor wants to decompress everything in a single step).
*/
@@ -200,7 +204,7 @@
#define Z_TEXT 1
#define Z_ASCII Z_TEXT /* for compatibility with 1.2.2 and earlier */
#define Z_UNKNOWN 2
-/* Possible values of the data_type field (though see inflate()) */
+/* Possible values of the data_type field for deflate() */
#define Z_DEFLATED 8
/* The deflate compression method (the only one supported in this version) */
@@ -258,11 +262,11 @@
enough room in the output buffer), next_in and avail_in are updated and
processing will resume at this point for the next call of deflate().
- - Provide more output starting at next_out and update next_out and avail_out
+ - Generate more output starting at next_out and update next_out and avail_out
accordingly. This action is forced if the parameter flush is non zero.
Forcing flush frequently degrades the compression ratio, so this parameter
- should be set only when necessary (in interactive applications). Some
- output may be provided even if flush is not set.
+ should be set only when necessary. Some output may be provided even if
+ flush is zero.
Before the call of deflate(), the application should ensure that at least
one of the actions is possible, by providing more input and/or consuming more
@@ -271,7 +275,9 @@
output when it wants, for example when the output buffer is full (avail_out
== 0), or after each call of deflate(). If deflate returns Z_OK and with
zero avail_out, it must be called again after making room in the output
- buffer because there might be more output pending.
+ buffer because there might be more output pending. See deflatePending(),
+ which can be used if desired to determine whether or not there is more ouput
+ in that case.
Normally the parameter flush is set to Z_NO_FLUSH, which allows deflate to
decide how much data to accumulate before producing output, in order to
@@ -292,8 +298,8 @@
input data so far will be available to the decompressor, as for Z_SYNC_FLUSH.
This completes the current deflate block and follows it with an empty fixed
codes block that is 10 bits long. This assures that enough bytes are output
- in order for the decompressor to finish the block before the empty fixed code
- block.
+ in order for the decompressor to finish the block before the empty fixed
+ codes block.
If flush is set to Z_BLOCK, a deflate block is completed and emitted, as
for Z_SYNC_FLUSH, but the output is not aligned on a byte boundary, and up to
@@ -319,34 +325,38 @@
If the parameter flush is set to Z_FINISH, pending input is processed,
pending output is flushed and deflate returns with Z_STREAM_END if there was
- enough output space; if deflate returns with Z_OK, this function must be
- called again with Z_FINISH and more output space (updated avail_out) but no
- more input data, until it returns with Z_STREAM_END or an error. After
- deflate has returned Z_STREAM_END, the only possible operations on the stream
- are deflateReset or deflateEnd.
+ enough output space. If deflate returns with Z_OK or Z_BUF_ERROR, this
+ function must be called again with Z_FINISH and more output space (updated
+ avail_out) but no more input data, until it returns with Z_STREAM_END or an
+ error. After deflate has returned Z_STREAM_END, the only possible operations
+ on the stream are deflateReset or deflateEnd.
- Z_FINISH can be used immediately after deflateInit if all the compression
- is to be done in a single step. In this case, avail_out must be at least the
- value returned by deflateBound (see below). Then deflate is guaranteed to
- return Z_STREAM_END. If not enough output space is provided, deflate will
- not return Z_STREAM_END, and it must be called again as described above.
+ Z_FINISH can be used in the first deflate call after deflateInit if all the
+ compression is to be done in a single step. In order to complete in one
+ call, avail_out must be at least the value returned by deflateBound (see
+ below). Then deflate is guaranteed to return Z_STREAM_END. If not enough
+ output space is provided, deflate will not return Z_STREAM_END, and it must
+ be called again as described above.
- deflate() sets strm->adler to the adler32 checksum of all input read
- so far (that is, total_in bytes).
+ deflate() sets strm->adler to the Adler-32 checksum of all input read
+ so far (that is, total_in bytes). If a gzip stream is being generated, then
+ strm->adler will be the CRC-32 checksum of the input read so far. (See
+ deflateInit2 below.)
deflate() may update strm->data_type if it can make a good guess about
- the input data type (Z_BINARY or Z_TEXT). In doubt, the data is considered
- binary. This field is only for information purposes and does not affect the
- compression algorithm in any manner.
+ the input data type (Z_BINARY or Z_TEXT). If in doubt, the data is
+ considered binary. This field is only for information purposes and does not
+ affect the compression algorithm in any manner.
deflate() returns Z_OK if some progress has been made (more input
processed or more output produced), Z_STREAM_END if all input has been
consumed and all output has been produced (only when flush is set to
Z_FINISH), Z_STREAM_ERROR if the stream state was inconsistent (for example
- if next_in or next_out was Z_NULL), Z_BUF_ERROR if no progress is possible
- (for example avail_in or avail_out was zero). Note that Z_BUF_ERROR is not
- fatal, and deflate() can be called again with more input and more output
- space to continue compressing.
+ if next_in or next_out was Z_NULL or the state was inadvertently written over
+ by the application), or Z_BUF_ERROR if no progress is possible (for example
+ avail_in or avail_out was zero). Note that Z_BUF_ERROR is not fatal, and
+ deflate() can be called again with more input and more output space to
+ continue compressing.
*/
@@ -369,23 +379,21 @@
Initializes the internal stream state for decompression. The fields
next_in, avail_in, zalloc, zfree and opaque must be initialized before by
- the caller. If next_in is not Z_NULL and avail_in is large enough (the
- exact value depends on the compression method), inflateInit determines the
- compression method from the zlib header and allocates all data structures
- accordingly; otherwise the allocation will be deferred to the first call of
- inflate. If zalloc and zfree are set to Z_NULL, inflateInit updates them to
- use default allocation functions.
+ the caller. In the current version of inflate, the provided input is not
+ read or consumed. The allocation of a sliding window will be deferred to
+ the first call of inflate (if the decompression does not complete on the
+ first call). If zalloc and zfree are set to Z_NULL, inflateInit updates
+ them to use default allocation functions.
inflateInit returns Z_OK if success, Z_MEM_ERROR if there was not enough
memory, Z_VERSION_ERROR if the zlib library version is incompatible with the
version assumed by the caller, or Z_STREAM_ERROR if the parameters are
invalid, such as a null pointer to the structure. msg is set to null if
- there is no error message. inflateInit does not perform any decompression
- apart from possibly reading the zlib header if present: actual decompression
- will be done by inflate(). (So next_in and avail_in may be modified, but
- next_out and avail_out are unused and unchanged.) The current implementation
- of inflateInit() does not process any header information -- that is deferred
- until inflate() is called.
+ there is no error message. inflateInit does not perform any decompression.
+ Actual decompression will be done by inflate(). So next_in, and avail_in,
+ next_out, and avail_out are unused and unchanged. The current
+ implementation of inflateInit() does not process any header information --
+ that is deferred until inflate() is called.
*/
@@ -401,17 +409,20 @@
- Decompress more input starting at next_in and update next_in and avail_in
accordingly. If not all input can be processed (because there is not
- enough room in the output buffer), next_in is updated and processing will
- resume at this point for the next call of inflate().
+ enough room in the output buffer), then next_in and avail_in are updated
+ accordingly, and processing will resume at this point for the next call of
+ inflate().
- - Provide more output starting at next_out and update next_out and avail_out
+ - Generate more output starting at next_out and update next_out and avail_out
accordingly. inflate() provides as much output as possible, until there is
no more input data or no more space in the output buffer (see below about
the flush parameter).
Before the call of inflate(), the application should ensure that at least
one of the actions is possible, by providing more input and/or consuming more
- output, and updating the next_* and avail_* values accordingly. The
+ output, and updating the next_* and avail_* values accordingly. If the
+ caller of inflate() does not provide both available input and available
+ output space, it is possible that there will be no progress made. The
application can consume the uncompressed output when it wants, for example
when the output buffer is full (avail_out == 0), or after each call of
inflate(). If inflate returns Z_OK and with zero avail_out, it must be
@@ -428,7 +439,7 @@
gets to the end of that block, or when it runs out of data.
The Z_BLOCK option assists in appending to or combining deflate streams.
- Also to assist in this, on return inflate() will set strm->data_type to the
+ To assist in this, on return inflate() always sets strm->data_type to the
number of unused bits in the last byte taken from strm->next_in, plus 64 if
inflate() is currently decoding the last block in the deflate stream, plus
128 if inflate() returned immediately after decoding an end-of-block code or
@@ -454,7 +465,7 @@
this case all pending input is processed and all pending output is flushed;
avail_out must be large enough to hold all of the uncompressed data for the
operation to complete. (The size of the uncompressed data may have been
- saved by the compressor for this purpose.) The use of Z_FINISH is not
+ saved by the compressor for this purpose.) The use of Z_FINISH is not
required to perform an inflation in one step. However it may be used to
inform inflate that a faster approach can be used for the single inflate()
call. Z_FINISH also informs inflate to not maintain a sliding window if the
@@ -476,32 +487,33 @@
chosen by the compressor and returns Z_NEED_DICT; otherwise it sets
strm->adler to the Adler-32 checksum of all output produced so far (that is,
total_out bytes) and returns Z_OK, Z_STREAM_END or an error code as described
- below. At the end of the stream, inflate() checks that its computed adler32
+ below. At the end of the stream, inflate() checks that its computed Adler-32
checksum is equal to that saved by the compressor and returns Z_STREAM_END
only if the checksum is correct.
inflate() can decompress and check either zlib-wrapped or gzip-wrapped
deflate data. The header type is detected automatically, if requested when
initializing with inflateInit2(). Any information contained in the gzip
- header is not retained, so applications that need that information should
- instead use raw inflate, see inflateInit2() below, or inflateBack() and
- perform their own processing of the gzip header and trailer. When processing
+ header is not retained unless inflateGetHeader() is used. When processing
gzip-wrapped deflate data, strm->adler32 is set to the CRC-32 of the output
- producted so far. The CRC-32 is checked against the gzip trailer.
+ produced so far. The CRC-32 is checked against the gzip trailer, as is the
+ uncompressed length, modulo 2^32.
inflate() returns Z_OK if some progress has been made (more input processed
or more output produced), Z_STREAM_END if the end of the compressed data has
been reached and all uncompressed output has been produced, Z_NEED_DICT if a
preset dictionary is needed at this point, Z_DATA_ERROR if the input data was
corrupted (input stream not conforming to the zlib format or incorrect check
- value), Z_STREAM_ERROR if the stream structure was inconsistent (for example
- next_in or next_out was Z_NULL), Z_MEM_ERROR if there was not enough memory,
- Z_BUF_ERROR if no progress is possible or if there was not enough room in the
- output buffer when Z_FINISH is used. Note that Z_BUF_ERROR is not fatal, and
+ value, in which case strm->msg points to a string with a more specific
+ error), Z_STREAM_ERROR if the stream structure was inconsistent (for example
+ next_in or next_out was Z_NULL, or the state was inadvertently written over
+ by the application), Z_MEM_ERROR if there was not enough memory, Z_BUF_ERROR
+ if no progress was possible or if there was not enough room in the output
+ buffer when Z_FINISH is used. Note that Z_BUF_ERROR is not fatal, and
inflate() can be called again with more input and more output space to
continue decompressing. If Z_DATA_ERROR is returned, the application may
then call inflateSync() to look for a good compression block if a partial
- recovery of the data is desired.
+ recovery of the data is to be attempted.
*/
@@ -511,9 +523,8 @@
This function discards any unprocessed input and does not flush any pending
output.
- inflateEnd returns Z_OK if success, Z_STREAM_ERROR if the stream state
- was inconsistent. In the error case, msg may be set but then points to a
- static string (which must not be deallocated).
+ inflateEnd returns Z_OK if success, or Z_STREAM_ERROR if the stream state
+ was inconsistent.
*/
@@ -544,16 +555,29 @@
compression at the expense of memory usage. The default value is 15 if
deflateInit is used instead.
+ For the current implementation of deflate(), a windowBits value of 8 (a
+ window size of 256 bytes) is not supported. As a result, a request for 8
+ will result in 9 (a 512-byte window). In that case, providing 8 to
+ inflateInit2() will result in an error when the zlib header with 9 is
+ checked against the initialization of inflate(). The remedy is to not use 8
+ with deflateInit2() with this initialization, or at least in that case use 9
+ with inflateInit2().
+
windowBits can also be -8..-15 for raw deflate. In this case, -windowBits
determines the window size. deflate() will then generate raw deflate data
- with no zlib header or trailer, and will not compute an adler32 check value.
+ with no zlib header or trailer, and will not compute a check value.
windowBits can also be greater than 15 for optional gzip encoding. Add
16 to windowBits to write a simple gzip header and trailer around the
compressed data instead of a zlib wrapper. The gzip header will have no
file name, no extra data, no comment, no modification time (set to zero), no
- header crc, and the operating system will be set to 255 (unknown). If a
- gzip stream is being written, strm->adler is a crc32 instead of an adler32.
+ header crc, and the operating system will be set to the appropriate value,
+ if the operating system was determined at compile time. If a gzip stream is
+ being written, strm->adler is a CRC-32 instead of an Adler-32.
+
+ For raw deflate or gzip encoding, a request for a 256-byte window is
+ rejected as invalid, since only the zlib header provides a means of
+ transmitting the window size to the decompressor.
The memLevel parameter specifies how much memory should be allocated
for the internal compression state. memLevel=1 uses minimum memory but is
@@ -614,12 +638,12 @@
addition, the current implementation of deflate will use at most the window
size minus 262 bytes of the provided dictionary.
- Upon return of this function, strm->adler is set to the adler32 value
+ Upon return of this function, strm->adler is set to the Adler-32 value
of the dictionary; the decompressor may later use this value to determine
- which dictionary has been used by the compressor. (The adler32 value
+ which dictionary has been used by the compressor. (The Adler-32 value
applies to the whole dictionary even if only a subset of the dictionary is
actually used by the compressor.) If a raw deflate was requested, then the
- adler32 value is not computed and strm->adler is not set.
+ Adler-32 value is not computed and strm->adler is not set.
deflateSetDictionary returns Z_OK if success, or Z_STREAM_ERROR if a
parameter is invalid (e.g. dictionary being Z_NULL) or the stream state is
@@ -628,6 +652,28 @@
not perform any compression: this will be done by deflate().
*/
+ZEXTERN int ZEXPORT deflateGetDictionary OF((z_streamp strm,
+ Bytef *dictionary,
+ uInt *dictLength));
+/*
+ Returns the sliding dictionary being maintained by deflate. dictLength is
+ set to the number of bytes in the dictionary, and that many bytes are copied
+ to dictionary. dictionary must have enough space, where 32768 bytes is
+ always enough. If deflateGetDictionary() is called with dictionary equal to
+ Z_NULL, then only the dictionary length is returned, and nothing is copied.
+ Similary, if dictLength is Z_NULL, then it is not set.
+
+ deflateGetDictionary() may return a length less than the window size, even
+ when more than the window size in input has been provided. It may return up
+ to 258 bytes less in that case, due to how zlib's implementation of deflate
+ manages the sliding window and lookahead for matches, where matches can be
+ up to 258 bytes long. If the application needs the last window-size bytes of
+ input, then that would need to be saved by the application outside of zlib.
+
+ deflateGetDictionary returns Z_OK on success, or Z_STREAM_ERROR if the
+ stream state is inconsistent.
+*/
+
ZEXTERN int ZEXPORT deflateCopy OF((z_streamp dest,
z_streamp source));
/*
@@ -648,10 +694,10 @@
ZEXTERN int ZEXPORT deflateReset OF((z_streamp strm));
/*
- This function is equivalent to deflateEnd followed by deflateInit,
- but does not free and reallocate all the internal compression state. The
- stream will keep the same compression level and any other attributes that
- may have been set by deflateInit2.
+ This function is equivalent to deflateEnd followed by deflateInit, but
+ does not free and reallocate the internal compression state. The stream
+ will leave the compression level and any other attributes that may have been
+ set unchanged.
deflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source
stream state was inconsistent (such as zalloc or state being Z_NULL).
@@ -662,20 +708,36 @@
int strategy));
/*
Dynamically update the compression level and compression strategy. The
- interpretation of level and strategy is as in deflateInit2. This can be
+ interpretation of level and strategy is as in deflateInit2(). This can be
used to switch between compression and straight copy of the input data, or
to switch to a different kind of input data requiring a different strategy.
- If the compression level is changed, the input available so far is
- compressed with the old level (and may be flushed); the new level will take
- effect only at the next call of deflate().
+ If the compression approach (which is a function of the level) or the
+ strategy is changed, and if any input has been consumed in a previous
+ deflate() call, then the input available so far is compressed with the old
+ level and strategy using deflate(strm, Z_BLOCK). There are three approaches
+ for the compression levels 0, 1..3, and 4..9 respectively. The new level
+ and strategy will take effect at the next call of deflate().
- Before the call of deflateParams, the stream state must be set as for
- a call of deflate(), since the currently available input may have to be
- compressed and flushed. In particular, strm->avail_out must be non-zero.
+ If a deflate(strm, Z_BLOCK) is performed by deflateParams(), and it does
+ not have enough output space to complete, then the parameter change will not
+ take effect. In this case, deflateParams() can be called again with the
+ same parameters and more output space to try again.
- deflateParams returns Z_OK if success, Z_STREAM_ERROR if the source
- stream state was inconsistent or if a parameter was invalid, Z_BUF_ERROR if
- strm->avail_out was zero.
+ In order to assure a change in the parameters on the first try, the
+ deflate stream should be flushed using deflate() with Z_BLOCK or other flush
+ request until strm.avail_out is not zero, before calling deflateParams().
+ Then no more input data should be provided before the deflateParams() call.
+ If this is done, the old level and strategy will be applied to the data
+ compressed before deflateParams(), and the new level and strategy will be
+ applied to the the data compressed after deflateParams().
+
+ deflateParams returns Z_OK on success, Z_STREAM_ERROR if the source stream
+ state was inconsistent or if a parameter was invalid, or Z_BUF_ERROR if
+ there was not enough output space to complete the compression of the
+ available input data before a change in the strategy or approach. Note that
+ in the case of a Z_BUF_ERROR, the parameters are not changed. A return
+ value of Z_BUF_ERROR is not fatal, in which case deflateParams() can be
+ retried with more output space.
*/
ZEXTERN int ZEXPORT deflateTune OF((z_streamp strm,
@@ -793,7 +855,7 @@
is for use with other formats that use the deflate compressed data format
such as zip. Those formats provide their own check values. If a custom
format is developed using the raw deflate format for compressed data, it is
- recommended that a check value such as an adler32 or a crc32 be applied to
+ recommended that a check value such as an Adler-32 or a CRC-32 be applied to
the uncompressed data as is done in the zlib, gzip, and zip formats. For
most applications, the zlib format should be used as is. Note that comments
above on the use in deflateInit2() applies to the magnitude of windowBits.
@@ -802,7 +864,10 @@
32 to windowBits to enable zlib and gzip decoding with automatic header
detection, or add 16 to decode only the gzip format (the zlib format will
return a Z_DATA_ERROR). If a gzip stream is being decoded, strm->adler is a
- crc32 instead of an adler32.
+ CRC-32 instead of an Adler-32. Unlike the gunzip utility and gzread() (see
+ below), inflate() will not automatically decode concatenated gzip streams.
+ inflate() will return Z_STREAM_END at the end of the gzip stream. The state
+ would need to be reset to continue decoding a subsequent gzip stream.
inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
memory, Z_VERSION_ERROR if the zlib library version is incompatible with the
@@ -823,7 +888,7 @@
Initializes the decompression dictionary from the given uncompressed byte
sequence. This function must be called immediately after a call of inflate,
if that call returned Z_NEED_DICT. The dictionary chosen by the compressor
- can be determined from the adler32 value returned by that call of inflate.
+ can be determined from the Adler-32 value returned by that call of inflate.
The compressor and decompressor must use exactly the same dictionary (see
deflateSetDictionary). For raw inflate, this function can be called at any
time to set the dictionary. If the provided dictionary is smaller than the
@@ -834,7 +899,7 @@
inflateSetDictionary returns Z_OK if success, Z_STREAM_ERROR if a
parameter is invalid (e.g. dictionary being Z_NULL) or the stream state is
inconsistent, Z_DATA_ERROR if the given dictionary doesn't match the
- expected one (incorrect adler32 value). inflateSetDictionary does not
+ expected one (incorrect Adler-32 value). inflateSetDictionary does not
perform any decompression: this will be done by subsequent calls of
inflate().
*/
@@ -892,7 +957,7 @@
ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm));
/*
This function is equivalent to inflateEnd followed by inflateInit,
- but does not free and reallocate all the internal decompression state. The
+ but does not free and reallocate the internal decompression state. The
stream will keep attributes that may have been set by inflateInit2.
inflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source
@@ -904,7 +969,9 @@
/*
This function is the same as inflateReset, but it also permits changing
the wrap and window size requests. The windowBits parameter is interpreted
- the same as it is for inflateInit2.
+ the same as it is for inflateInit2. If the window size is changed, then the
+ memory allocated for the window is freed, and the window will be reallocated
+ by inflate() if needed.
inflateReset2 returns Z_OK if success, or Z_STREAM_ERROR if the source
stream state was inconsistent (such as zalloc or state being Z_NULL), or if
@@ -956,7 +1023,7 @@
location in the input stream can be determined from avail_in and data_type
as noted in the description for the Z_BLOCK flush parameter for inflate.
- inflateMark returns the value noted above or -1 << 16 if the provided
+ inflateMark returns the value noted above, or -65536 if the provided
source stream state was inconsistent.
*/
@@ -1048,9 +1115,9 @@
This routine would normally be used in a utility that reads zip or gzip
files and writes out uncompressed files. The utility would decode the
header and process the trailer on its own, hence this routine expects only
- the raw deflate stream to decompress. This is different from the normal
- behavior of inflate(), which expects either a zlib or gzip header and
- trailer around the deflate stream.
+ the raw deflate stream to decompress. This is different from the default
+ behavior of inflate(), which expects a zlib header and trailer around the
+ deflate stream.
inflateBack() uses two subroutines supplied by the caller that are then
called by inflateBack() for input and output. inflateBack() calls those
@@ -1059,12 +1126,12 @@
parameters and return types are defined above in the in_func and out_func
typedefs. inflateBack() will call in(in_desc, &buf) which should return the
number of bytes of provided input, and a pointer to that input in buf. If
- there is no input available, in() must return zero--buf is ignored in that
- case--and inflateBack() will return a buffer error. inflateBack() will call
- out(out_desc, buf, len) to write the uncompressed data buf[0..len-1]. out()
- should return zero on success, or non-zero on failure. If out() returns
- non-zero, inflateBack() will return with an error. Neither in() nor out()
- are permitted to change the contents of the window provided to
+ there is no input available, in() must return zero -- buf is ignored in that
+ case -- and inflateBack() will return a buffer error. inflateBack() will
+ call out(out_desc, buf, len) to write the uncompressed data buf[0..len-1].
+ out() should return zero on success, or non-zero on failure. If out()
+ returns non-zero, inflateBack() will return with an error. Neither in() nor
+ out() are permitted to change the contents of the window provided to
inflateBackInit(), which is also the buffer that out() uses to write from.
The length written by out() will be at most the window size. Any non-zero
amount of input may be provided by in().
@@ -1092,7 +1159,7 @@
using strm->next_in which will be Z_NULL only if in() returned an error. If
strm->next_in is not Z_NULL, then the Z_BUF_ERROR was due to out() returning
non-zero. (in() will always be called before out(), so strm->next_in is
- assured to be defined if out() returns non-zero.) Note that inflateBack()
+ assured to be defined if out() returns non-zero.) Note that inflateBack()
cannot return Z_OK.
*/
@@ -1114,7 +1181,7 @@
7.6: size of z_off_t
Compiler, assembler, and debug options:
- 8: DEBUG
+ 8: ZLIB_DEBUG
9: ASMV or ASMINF -- use ASM code
10: ZLIB_WINAPI -- exported functions use the WINAPI calling convention
11: 0 (reserved)
@@ -1164,7 +1231,8 @@
the byte length of the source buffer. Upon entry, destLen is the total size
of the destination buffer, which must be at least the value returned by
compressBound(sourceLen). Upon exit, destLen is the actual size of the
- compressed buffer.
+ compressed data. compress() is equivalent to compress2() with a level
+ parameter of Z_DEFAULT_COMPRESSION.
compress returns Z_OK if success, Z_MEM_ERROR if there was not
enough memory, Z_BUF_ERROR if there was not enough room in the output
@@ -1180,7 +1248,7 @@
length of the source buffer. Upon entry, destLen is the total size of the
destination buffer, which must be at least the value returned by
compressBound(sourceLen). Upon exit, destLen is the actual size of the
- compressed buffer.
+ compressed data.
compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
memory, Z_BUF_ERROR if there was not enough room in the output buffer,
@@ -1203,7 +1271,7 @@
uncompressed data. (The size of the uncompressed data must have been saved
previously by the compressor and transmitted to the decompressor by some
mechanism outside the scope of this compression library.) Upon exit, destLen
- is the actual size of the uncompressed buffer.
+ is the actual size of the uncompressed data.
uncompress returns Z_OK if success, Z_MEM_ERROR if there was not
enough memory, Z_BUF_ERROR if there was not enough room in the output
@@ -1212,6 +1280,14 @@
buffer with the uncompressed data up to that point.
*/
+ZEXTERN int ZEXPORT uncompress2 OF((Bytef *dest, uLongf *destLen,
+ const Bytef *source, uLong *sourceLen));
+/*
+ Same as uncompress, except that sourceLen is a pointer, where the
+ length of the source is *sourceLen. On return, *sourceLen is the number of
+ source bytes consumed.
+*/
+
/* gzip file access functions */
/*
@@ -1290,10 +1366,9 @@
default buffer size is 8192 bytes. This function must be called after
gzopen() or gzdopen(), and before any other calls that read or write the
file. The buffer memory allocation is always deferred to the first read or
- write. Two buffers are allocated, either both of the specified size when
- writing, or one of the specified size and the other twice that size when
- reading. A larger buffer size of, for example, 64K or 128K bytes will
- noticeably increase the speed of decompression (reading).
+ write. Three times that size in buffer space is allocated. A larger buffer
+ size of, for example, 64K or 128K bytes will noticeably increase the speed
+ of decompression (reading).
The new buffer size also affects the maximum length for gzprintf().
@@ -1304,10 +1379,12 @@
ZEXTERN int ZEXPORT gzsetparams OF((gzFile file, int level, int strategy));
/*
Dynamically update the compression level or strategy. See the description
- of deflateInit2 for the meaning of these parameters.
+ of deflateInit2 for the meaning of these parameters. Previously provided
+ data is flushed before the parameter change.
- gzsetparams returns Z_OK if success, or Z_STREAM_ERROR if the file was not
- opened for writing.
+ gzsetparams returns Z_OK if success, Z_STREAM_ERROR if the file was not
+ opened for writing, Z_ERRNO if there is an error writing the flushed data,
+ or Z_MEM_ERROR if there is a memory allocation error.
*/
ZEXTERN int ZEXPORT gzread OF((gzFile file, voidp buf, unsigned len));
@@ -1335,7 +1412,35 @@
case.
gzread returns the number of uncompressed bytes actually read, less than
- len for end of file, or -1 for error.
+ len for end of file, or -1 for error. If len is too large to fit in an int,
+ then nothing is read, -1 is returned, and the error state is set to
+ Z_STREAM_ERROR.
+*/
+
+ZEXTERN z_size_t ZEXPORT gzfread OF((voidp buf, z_size_t size, z_size_t nitems,
+ gzFile file));
+/*
+ Read up to nitems items of size size from file to buf, otherwise operating
+ as gzread() does. This duplicates the interface of stdio's fread(), with
+ size_t request and return types. If the library defines size_t, then
+ z_size_t is identical to size_t. If not, then z_size_t is an unsigned
+ integer type that can contain a pointer.
+
+ gzfread() returns the number of full items read of size size, or zero if
+ the end of the file was reached and a full item could not be read, or if
+ there was an error. gzerror() must be consulted if zero is returned in
+ order to determine if there was an error. If the multiplication of size and
+ nitems overflows, i.e. the product does not fit in a z_size_t, then nothing
+ is read, zero is returned, and the error state is set to Z_STREAM_ERROR.
+
+ In the event that the end of file is reached and only a partial item is
+ available at the end, i.e. the remaining uncompressed data length is not a
+ multiple of size, then the final partial item is nevetheless read into buf
+ and the end-of-file flag is set. The length of the partial item read is not
+ provided, but could be inferred from the result of gztell(). This behavior
+ is the same as the behavior of fread() implementations in common libraries,
+ but it prevents the direct use of gzfread() to read a concurrently written
+ file, reseting and retrying on end-of-file, when size is not 1.
*/
ZEXTERN int ZEXPORT gzwrite OF((gzFile file,
@@ -1346,19 +1451,33 @@
error.
*/
+ZEXTERN z_size_t ZEXPORT gzfwrite OF((voidpc buf, z_size_t size,
+ z_size_t nitems, gzFile file));
+/*
+ gzfwrite() writes nitems items of size size from buf to file, duplicating
+ the interface of stdio's fwrite(), with size_t request and return types. If
+ the library defines size_t, then z_size_t is identical to size_t. If not,
+ then z_size_t is an unsigned integer type that can contain a pointer.
+
+ gzfwrite() returns the number of full items written of size size, or zero
+ if there was an error. If the multiplication of size and nitems overflows,
+ i.e. the product does not fit in a z_size_t, then nothing is written, zero
+ is returned, and the error state is set to Z_STREAM_ERROR.
+*/
+
ZEXTERN int ZEXPORTVA gzprintf Z_ARG((gzFile file, const char *format, ...));
/*
Converts, formats, and writes the arguments to the compressed file under
control of the format string, as in fprintf. gzprintf returns the number of
- uncompressed bytes actually written, or 0 in case of error. The number of
- uncompressed bytes written is limited to 8191, or one less than the buffer
- size given to gzbuffer(). The caller should assure that this limit is not
- exceeded. If it is exceeded, then gzprintf() will return an error (0) with
- nothing written. In this case, there may also be a buffer overflow with
- unpredictable consequences, which is possible only if zlib was compiled with
- the insecure functions sprintf() or vsprintf() because the secure snprintf()
- or vsnprintf() functions were not available. This can be determined using
- zlibCompileFlags().
+ uncompressed bytes actually written, or a negative zlib error code in case
+ of error. The number of uncompressed bytes written is limited to 8191, or
+ one less than the buffer size given to gzbuffer(). The caller should assure
+ that this limit is not exceeded. If it is exceeded, then gzprintf() will
+ return an error (0) with nothing written. In this case, there may also be a
+ buffer overflow with unpredictable consequences, which is possible only if
+ zlib was compiled with the insecure functions sprintf() or vsprintf()
+ because the secure snprintf() or vsnprintf() functions were not available.
+ This can be determined using zlibCompileFlags().
*/
ZEXTERN int ZEXPORT gzputs OF((gzFile file, const char *s));
@@ -1418,7 +1537,7 @@
If the flush parameter is Z_FINISH, the remaining data is written and the
gzip stream is completed in the output. If gzwrite() is called again, a new
gzip stream will be started in the output. gzread() is able to read such
- concatented gzip streams.
+ concatenated gzip streams.
gzflush should be called only when strictly necessary because it will
degrade compression if called too often.
@@ -1572,7 +1691,7 @@
return the updated checksum. If buf is Z_NULL, this function returns the
required initial value for the checksum.
- An Adler-32 checksum is almost as reliable as a CRC32 but can be computed
+ An Adler-32 checksum is almost as reliable as a CRC-32 but can be computed
much faster.
Usage example:
@@ -1585,6 +1704,12 @@
if (adler != original_adler) error();
*/
+ZEXTERN uLong ZEXPORT adler32_z OF((uLong adler, const Bytef *buf,
+ z_size_t len));
+/*
+ Same as adler32(), but with a size_t length.
+*/
+
/*
ZEXTERN uLong ZEXPORT adler32_combine OF((uLong adler1, uLong adler2,
z_off_t len2));
@@ -1614,6 +1739,12 @@
if (crc != original_crc) error();
*/
+ZEXTERN uLong ZEXPORT crc32_z OF((uLong adler, const Bytef *buf,
+ z_size_t len));
+/*
+ Same as crc32(), but with a size_t length.
+*/
+
/*
ZEXTERN uLong ZEXPORT crc32_combine OF((uLong crc1, uLong crc2, z_off_t len2));
@@ -1644,19 +1775,35 @@
unsigned char FAR *window,
const char *version,
int stream_size));
-#define deflateInit(strm, level) \
- deflateInit_((strm), (level), ZLIB_VERSION, (int)sizeof(z_stream))
-#define inflateInit(strm) \
- inflateInit_((strm), ZLIB_VERSION, (int)sizeof(z_stream))
-#define deflateInit2(strm, level, method, windowBits, memLevel, strategy) \
- deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\
- (strategy), ZLIB_VERSION, (int)sizeof(z_stream))
-#define inflateInit2(strm, windowBits) \
- inflateInit2_((strm), (windowBits), ZLIB_VERSION, \
- (int)sizeof(z_stream))
-#define inflateBackInit(strm, windowBits, window) \
- inflateBackInit_((strm), (windowBits), (window), \
- ZLIB_VERSION, (int)sizeof(z_stream))
+#ifdef Z_PREFIX_SET
+# define z_deflateInit(strm, level) \
+ deflateInit_((strm), (level), ZLIB_VERSION, (int)sizeof(z_stream))
+# define z_inflateInit(strm) \
+ inflateInit_((strm), ZLIB_VERSION, (int)sizeof(z_stream))
+# define z_deflateInit2(strm, level, method, windowBits, memLevel, strategy) \
+ deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\
+ (strategy), ZLIB_VERSION, (int)sizeof(z_stream))
+# define z_inflateInit2(strm, windowBits) \
+ inflateInit2_((strm), (windowBits), ZLIB_VERSION, \
+ (int)sizeof(z_stream))
+# define z_inflateBackInit(strm, windowBits, window) \
+ inflateBackInit_((strm), (windowBits), (window), \
+ ZLIB_VERSION, (int)sizeof(z_stream))
+#else
+# define deflateInit(strm, level) \
+ deflateInit_((strm), (level), ZLIB_VERSION, (int)sizeof(z_stream))
+# define inflateInit(strm) \
+ inflateInit_((strm), ZLIB_VERSION, (int)sizeof(z_stream))
+# define deflateInit2(strm, level, method, windowBits, memLevel, strategy) \
+ deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\
+ (strategy), ZLIB_VERSION, (int)sizeof(z_stream))
+# define inflateInit2(strm, windowBits) \
+ inflateInit2_((strm), (windowBits), ZLIB_VERSION, \
+ (int)sizeof(z_stream))
+# define inflateBackInit(strm, windowBits, window) \
+ inflateBackInit_((strm), (windowBits), (window), \
+ ZLIB_VERSION, (int)sizeof(z_stream))
+#endif
#ifndef Z_SOLO
@@ -1676,16 +1823,15 @@
#ifdef Z_PREFIX_SET
# undef z_gzgetc
# define z_gzgetc(g) \
- ((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) : gzgetc(g))
-#else
-# ifdef MOZZCONF_H
+ ((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) : (gzgetc)(g))
+#elif defined(Z_CR_PREFIX_SET)
# undef gzgetc
# define gzgetc(g) \
- ((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) : MOZ_Z_gzgetc(g))
-# else
-# define gzgetc(g) \
- ((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) : gzgetc(g))
-# endif
+ ((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) \
+ : (Cr_z_gzgetc)(g))
+#else
+# define gzgetc(g) \
+ ((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) : (gzgetc)(g))
#endif
/* provide 64-bit offset functions if _LARGEFILE64_SOURCE defined, and/or
@@ -1761,19 +1907,16 @@
#endif /* !Z_SOLO */
-/* hack for buggy compilers */
-#if !defined(ZUTIL_H) && !defined(NO_DUMMY_DECL)
- struct internal_state {int dummy;};
-#endif
-
/* undocumented functions */
ZEXTERN const char * ZEXPORT zError OF((int));
ZEXTERN int ZEXPORT inflateSyncPoint OF((z_streamp));
ZEXTERN const z_crc_t FAR * ZEXPORT get_crc_table OF((void));
ZEXTERN int ZEXPORT inflateUndermine OF((z_streamp, int));
+ZEXTERN int ZEXPORT inflateValidate OF((z_streamp, int));
+ZEXTERN unsigned long ZEXPORT inflateCodesUsed OF ((z_streamp));
ZEXTERN int ZEXPORT inflateResetKeep OF((z_streamp));
ZEXTERN int ZEXPORT deflateResetKeep OF((z_streamp));
-#if defined(_WIN32) && !defined(Z_SOLO)
+#if (defined(_WIN32) || defined(__CYGWIN__)) && !defined(Z_SOLO)
ZEXTERN gzFile ZEXPORT gzopen_w OF((const wchar_t *path,
const char *mode));
#endif
diff --git a/zutil.c b/zutil.c
index 23d2ebe..a76c6b0 100644
--- a/zutil.c
+++ b/zutil.c
@@ -1,5 +1,5 @@
/* zutil.c -- target dependent utility functions for the compression library
- * Copyright (C) 1995-2005, 2010, 2011, 2012 Jean-loup Gailly.
+ * Copyright (C) 1995-2017 Jean-loup Gailly
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@@ -10,21 +10,18 @@
# include "gzguts.h"
#endif
-#ifndef NO_DUMMY_DECL
-struct internal_state {int dummy;}; /* for buggy compilers */
-#endif
-
z_const char * const z_errmsg[10] = {
-"need dictionary", /* Z_NEED_DICT 2 */
-"stream end", /* Z_STREAM_END 1 */
-"", /* Z_OK 0 */
-"file error", /* Z_ERRNO (-1) */
-"stream error", /* Z_STREAM_ERROR (-2) */
-"data error", /* Z_DATA_ERROR (-3) */
-"insufficient memory", /* Z_MEM_ERROR (-4) */
-"buffer error", /* Z_BUF_ERROR (-5) */
-"incompatible version",/* Z_VERSION_ERROR (-6) */
-""};
+ (z_const char *)"need dictionary", /* Z_NEED_DICT 2 */
+ (z_const char *)"stream end", /* Z_STREAM_END 1 */
+ (z_const char *)"", /* Z_OK 0 */
+ (z_const char *)"file error", /* Z_ERRNO (-1) */
+ (z_const char *)"stream error", /* Z_STREAM_ERROR (-2) */
+ (z_const char *)"data error", /* Z_DATA_ERROR (-3) */
+ (z_const char *)"insufficient memory", /* Z_MEM_ERROR (-4) */
+ (z_const char *)"buffer error", /* Z_BUF_ERROR (-5) */
+ (z_const char *)"incompatible version",/* Z_VERSION_ERROR (-6) */
+ (z_const char *)""
+};
const char * ZEXPORT zlibVersion()
@@ -61,7 +58,7 @@
case 8: flags += 2 << 6; break;
default: flags += 3 << 6;
}
-#ifdef DEBUG
+#ifdef ZLIB_DEBUG
flags += 1 << 8;
#endif
#if defined(ASMV) || defined(ASMINF)
@@ -115,8 +112,8 @@
return flags;
}
-#ifdef DEBUG
-
+#ifdef ZLIB_DEBUG
+#include <stdlib.h>
# ifndef verbose
# define verbose 0
# endif
@@ -219,9 +216,11 @@
voidpf ZLIB_INTERNAL zcalloc (voidpf opaque, unsigned items, unsigned size)
{
- voidpf buf = opaque; /* just to make some compilers happy */
+ voidpf buf;
ulg bsize = (ulg)items*size;
+ (void)opaque;
+
/* If we allocate less than 65520 bytes, we assume that farmalloc
* will return a usable pointer which doesn't have to be normalized.
*/
@@ -244,6 +243,9 @@
void ZLIB_INTERNAL zcfree (voidpf opaque, voidpf ptr)
{
int n;
+
+ (void)opaque;
+
if (*(ush*)&ptr != 0) { /* object < 64K */
farfree(ptr);
return;
@@ -259,7 +261,6 @@
next_ptr--;
return;
}
- ptr = opaque; /* just to make some compilers happy */
Assert(0, "zcfree: ptr not found");
}
@@ -278,13 +279,13 @@
voidpf ZLIB_INTERNAL zcalloc (voidpf opaque, uInt items, uInt size)
{
- if (opaque) opaque = 0; /* to make compiler happy */
+ (void)opaque;
return _halloc((long)items, size);
}
void ZLIB_INTERNAL zcfree (voidpf opaque, voidpf ptr)
{
- if (opaque) opaque = 0; /* to make compiler happy */
+ (void)opaque;
_hfree(ptr);
}
@@ -306,7 +307,7 @@
unsigned items;
unsigned size;
{
- if (opaque) items += size - size; /* make compiler happy */
+ (void)opaque;
return sizeof(uInt) > 2 ? (voidpf)malloc(items * size) :
(voidpf)calloc(items, size);
}
@@ -315,8 +316,8 @@
voidpf opaque;
voidpf ptr;
{
+ (void)opaque;
free(ptr);
- if (opaque) return; /* make compiler happy */
}
#endif /* MY_ZCALLOC */
diff --git a/zutil.h b/zutil.h
index fe9e53c..4425bcf 100644
--- a/zutil.h
+++ b/zutil.h
@@ -1,5 +1,5 @@
/* zutil.h -- internal interface and configuration of the compression library
- * Copyright (C) 1995-2013 Jean-loup Gailly.
+ * Copyright (C) 1995-2016 Jean-loup Gailly, Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@@ -51,7 +51,9 @@
#ifndef local
# define local static
#endif
-/* compile with -Dlocal if your debugger can't find static symbols */
+/* since "static" is used to mean two completely different things in C, we
+ define "local" for the non-static meaning of "static", for readability
+ (compile with -Dlocal if your debugger can't find static symbols) */
typedef unsigned char uch;
typedef uch FAR uchf;
@@ -113,28 +115,38 @@
#endif
#ifdef AMIGA
-# define OS_CODE 0x01
+# define OS_CODE 1
#endif
#if defined(VAXC) || defined(VMS)
-# define OS_CODE 0x02
+# define OS_CODE 2
# define F_OPEN(name, mode) \
fopen((name), (mode), "mbc=60", "ctx=stm", "rfm=fix", "mrs=512")
#endif
+#ifdef __370__
+# if __TARGET_LIB__ < 0x20000000
+# define OS_CODE 4
+# elif __TARGET_LIB__ < 0x40000000
+# define OS_CODE 11
+# else
+# define OS_CODE 8
+# endif
+#endif
+
#if defined(ATARI) || defined(atarist)
-# define OS_CODE 0x05
+# define OS_CODE 5
#endif
#ifdef OS2
-# define OS_CODE 0x06
+# define OS_CODE 6
# if defined(M_I86) && !defined(Z_SOLO)
# include <malloc.h>
# endif
#endif
#if defined(MACOS) || defined(TARGET_OS_MAC)
-# define OS_CODE 0x07
+# define OS_CODE 7
# ifndef Z_SOLO
# if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
# include <unix.h> /* for fdopen */
@@ -146,24 +158,24 @@
# endif
#endif
-#ifdef TOPS20
-# define OS_CODE 0x0a
+#ifdef __acorn
+# define OS_CODE 13
#endif
-#ifdef _MSC_VER
-#define zalign(x) __declspec(align(x))
-#else
-#define zalign(x) __attribute__((aligned((x))))
+#if defined(WIN32) && !defined(__CYGWIN__)
+# define OS_CODE 10
#endif
-#ifdef WIN32
-# ifndef __CYGWIN__ /* Cygwin is Unix, not Win32 */
-# define OS_CODE 0x0b
-# endif
+#ifdef _BEOS_
+# define OS_CODE 16
#endif
-#ifdef __50SERIES /* Prime/PRIMOS */
-# define OS_CODE 0x0f
+#ifdef __TOS_OS400__
+# define OS_CODE 18
+#endif
+
+#ifdef __APPLE__
+# define OS_CODE 19
#endif
#if defined(_BEOS_) || defined(RISCOS)
@@ -198,7 +210,7 @@
/* common defaults */
#ifndef OS_CODE
-# define OS_CODE 0x03 /* assume Unix */
+# define OS_CODE 3 /* assume Unix */
#endif
#ifndef F_OPEN
@@ -237,7 +249,7 @@
#endif
/* Diagnostic functions */
-#ifdef DEBUG
+#ifdef ZLIB_DEBUG
# include <stdio.h>
extern int ZLIB_INTERNAL z_verbose;
extern void ZLIB_INTERNAL z_error OF((char *m));
@@ -271,4 +283,10 @@
#define ZSWAP32(q) ((((q) >> 24) & 0xff) + (((q) >> 8) & 0xff00) + \
(((q) & 0xff00) << 8) + (((q) & 0xff) << 24))
+#ifdef _MSC_VER
+#define zalign(x) __declspec(align(x))
+#else
+#define zalign(x) __attribute__((aligned((x))))
+#endif
+
#endif /* ZUTIL_H */