virtual bool rawSkip(size_t length);
virtual int rawPercentRead();
private:
- void *m_gzFile;
+ gzFile m_gzFile;
double m_endOffset;
};
# adjust warnings
if (MSVC)
add_definitions (-wd4131) # uses old-style declarator
+else ()
+ add_definitions (-DHAVE_UNISTD_H)
endif ()
add_library (z_bundled STATIC
ChangeLog file for zlib
+Changes in 1.2.6 (29 Jan 2012)
+- Update the Pascal interface in contrib/pascal
+- Fix function numbers for gzgetc_ in zlibvc.def files
+- Fix configure.ac for contrib/minizip [Schiffer]
+- Fix large-entry detection in minizip on 64-bit systems [Schiffer]
+- Have ./configure use the compiler return code for error indication
+- Fix CMakeLists.txt for cross compilation [McClure]
+- Fix contrib/minizip/zip.c for 64-bit architectures [Dalsnes]
+- Fix compilation of contrib/minizip on FreeBSD [Marquez]
+- Correct suggested usages in win32/Makefile.msc [Shachar, Horvath]
+- Include io.h for Turbo C / Borland C on all platforms [Truta]
+- Make version explicit in contrib/minizip/configure.ac [Bosmans]
+- Avoid warning for no encryption in contrib/minizip/zip.c [Vollant]
+- Minor cleanup up contrib/minizip/unzip.c [Vollant]
+- Fix bug when compiling minizip with C++ [Vollant]
+- Protect for long name and extra fields in contrib/minizip [Vollant]
+- Avoid some warnings in contrib/minizip [Vollant]
+- Add -I../.. -L../.. to CFLAGS for minizip and miniunzip
+- Add missing libs to minizip linker command
+- Add support for VPATH builds in contrib/minizip
+- Add an --enable-demos option to contrib/minizip/configure
+- Add the generation of configure.log by ./configure
+- Exit when required parameters not provided to win32/Makefile.gcc
+- Have gzputc return the character written instead of the argument
+- Use the -m option on ldconfig for BSD systems [Tobias]
+- Correct in zlib.map when deflateResetKeep was added
+
+Changes in 1.2.5.3 (15 Jan 2012)
+- Restore gzgetc function for binary compatibility
+- Do not use _lseeki64 under Borland C++ [Truta]
+- Update win32/Makefile.msc to build test/*.c [Truta]
+- Remove old/visualc6 given CMakefile and other alternatives
+- Update AS400 build files and documentation [Monnerat]
+- Update win32/Makefile.gcc to build test/*.c [Truta]
+- Permit stronger flushes after Z_BLOCK flushes
+- Avoid extraneous empty blocks when doing empty flushes
+- Permit Z_NULL arguments to deflatePending
+- Allow deflatePrime() to insert bits in the middle of a stream
+- Remove second empty static block for Z_PARTIAL_FLUSH
+- Write out all of the available bits when using Z_BLOCK
+- Insert the first two strings in the hash table after a flush
+
+Changes in 1.2.5.2 (17 Dec 2011)
+- fix ld error: unable to find version dependency 'ZLIB_1.2.5'
+- use relative symlinks for shared libs
+- Avoid searching past window for Z_RLE strategy
+- Assure that high-water mark initialization is always applied in deflate
+- Add assertions to fill_window() in deflate.c to match comments
+- Update python link in README
+- Correct spelling error in gzread.c
+- Fix bug in gzgets() for a concatenated empty gzip stream
+- Correct error in comment for gz_make()
+- Change gzread() and related to ignore junk after gzip streams
+- Allow gzread() and related to continue after gzclearerr()
+- Allow gzrewind() and gzseek() after a premature end-of-file
+- Simplify gzseek() now that raw after gzip is ignored
+- Change gzgetc() to a macro for speed (~40% speedup in testing)
+- Fix gzclose() to return the actual error last encountered
+- Always add large file support for windows
+- Include zconf.h for windows large file support
+- Include zconf.h.cmakein for windows large file support
+- Update zconf.h.cmakein on make distclean
+- Merge vestigial vsnprintf determination from zutil.h to gzguts.h
+- Clarify how gzopen() appends in zlib.h comments
+- Correct documentation of gzdirect() since junk at end now ignored
+- Add a transparent write mode to gzopen() when 'T' is in the mode
+- Update python link in zlib man page
+- Get inffixed.h and MAKEFIXED result to match
+- Add a ./config --solo option to make zlib subset with no libary use
+- Add undocumented inflateResetKeep() function for CAB file decoding
+- Add --cover option to ./configure for gcc coverage testing
+- Add #define ZLIB_CONST option to use const in the z_stream interface
+- Add comment to gzdopen() in zlib.h to use dup() when using fileno()
+- Note behavior of uncompress() to provide as much data as it can
+- Add files in contrib/minizip to aid in building libminizip
+- Split off AR options in Makefile.in and configure
+- Change ON macro to Z_ARG to avoid application conflicts
+- Facilitate compilation with Borland C++ for pragmas and vsnprintf
+- Include io.h for Turbo C / Borland C++
+- Move example.c and minigzip.c to test/
+- Simplify incomplete code table filling in inflate_table()
+- Remove code from inflate.c and infback.c that is impossible to execute
+- Test the inflate code with full coverage
+- Allow deflateSetDictionary, inflateSetDictionary at any time (in raw)
+- Add deflateResetKeep and fix inflateResetKeep to retain dictionary
+- Fix gzwrite.c to accommodate reduced memory zlib compilation
+- Have inflate() with Z_FINISH avoid the allocation of a window
+- Do not set strm->adler when doing raw inflate
+- Fix gzeof() to behave just like feof() when read is not past end of file
+- Fix bug in gzread.c when end-of-file is reached
+- Avoid use of Z_BUF_ERROR in gz* functions except for premature EOF
+- Document gzread() capability to read concurrently written files
+- Remove hard-coding of resource compiler in CMakeLists.txt [Blammo]
+
+Changes in 1.2.5.1 (10 Sep 2011)
+- Update FAQ entry on shared builds (#13)
+- Avoid symbolic argument to chmod in Makefile.in
+- Fix bug and add consts in contrib/puff [Oberhumer]
+- Update contrib/puff/zeros.raw test file to have all block types
+- Add full coverage test for puff in contrib/puff/Makefile
+- Fix static-only-build install in Makefile.in
+- Fix bug in unzGetCurrentFileInfo() in contrib/minizip [Kuno]
+- Add libz.a dependency to shared in Makefile.in for parallel builds
+- Spell out "number" (instead of "nb") in zlib.h for total_in, total_out
+- Replace $(...) with `...` in configure for non-bash sh [Bowler]
+- Add darwin* to Darwin* and solaris* to SunOS\ 5* in configure [Groffen]
+- Add solaris* to Linux* in configure to allow gcc use [Groffen]
+- Add *bsd* to Linux* case in configure [Bar-Lev]
+- Add inffast.obj to dependencies in win32/Makefile.msc
+- Correct spelling error in deflate.h [Kohler]
+- Change libzdll.a again to libz.dll.a (!) in win32/Makefile.gcc
+- Add test to configure for GNU C looking for gcc in output of $cc -v
+- Add zlib.pc generation to win32/Makefile.gcc [Weigelt]
+- Fix bug in zlib.h for _FILE_OFFSET_BITS set and _LARGEFILE64_SOURCE not
+- Add comment in zlib.h that adler32_combine with len2 < 0 makes no sense
+- Make NO_DIVIDE option in adler32.c much faster (thanks to John Reiser)
+- Make stronger test in zconf.h to include unistd.h for LFS
+- Apply Darwin patches for 64-bit file offsets to contrib/minizip [Slack]
+- Fix zlib.h LFS support when Z_PREFIX used
+- Add updated as400 support (removed from old) [Monnerat]
+- Avoid deflate sensitivity to volatile input data
+- Avoid division in adler32_combine for NO_DIVIDE
+- Clarify the use of Z_FINISH with deflateBound() amount of space
+- Set binary for output file in puff.c
+- Use u4 type for crc_table to avoid conversion warnings
+- Apply casts in zlib.h to avoid conversion warnings
+- Add OF to prototypes for adler32_combine_ and crc32_combine_ [Miller]
+- Improve inflateSync() documentation to note indeterminancy
+- Add deflatePending() function to return the amount of pending output
+- Correct the spelling of "specification" in FAQ [Randers-Pehrson]
+- Add a check in configure for stdarg.h, use for gzprintf()
+- Check that pointers fit in ints when gzprint() compiled old style
+- Add dummy name before $(SHAREDLIBV) in Makefile [Bar-Lev, Bowler]
+- Delete line in configure that adds -L. libz.a to LDFLAGS [Weigelt]
+- Add debug records in assmebler code [Londer]
+- Update RFC references to use http://tools.ietf.org/html/... [Li]
+- Add --archs option, use of libtool to configure for Mac OS X [Borstel]
+
Changes in 1.2.5 (19 Apr 2010)
- Disable visibility attribute in win32/Makefile.gcc [Bar-Lev]
- Default to libdir as sharedlibdir in configure [Nieder]
- Update copyright dates on modified source files
- Update trees.c to be able to generate modified trees.h
- Exit configure for MinGW, suggesting win32/Makefile.gcc
+- Check for NULL path in gz_open [Homurlu]
Changes in 1.2.4.5 (18 Apr 2010)
- Set sharedlibdir in configure [Torok]
- Clear bytes after deflate lookahead to avoid use of uninitialized data
- Change a limit in inftrees.c to be more transparent to Coverity Prevent
- Update win32/zlib.def with exported symbols from zlib.h
-- Correct spelling error in zlib.h [Willem]
+- Correct spelling errors in zlib.h [Willem, Sobrado]
- Allow Z_BLOCK for deflate() to force a new block
- Allow negative bits in inflatePrime() to delete existing bit buffer
- Add Z_TREES flush option to inflate() to return at end of trees
ZLIB DATA COMPRESSION LIBRARY
-zlib 1.2.5 is a general purpose data compression library. All the code is
+zlib 1.2.6 is a general purpose data compression library. All the code is
thread safe. The data format used by the zlib library is described by RFCs
(Request for Comments) 1950 to 1952 in the files
-http://www.ietf.org/rfc/rfc1950.txt (zlib format), rfc1951.txt (deflate format)
-and rfc1952.txt (gzip format).
+http://tools.ietf.org/html/rfc1950 (zlib format), rfc1951 (deflate format) and
+rfc1952 (gzip format).
All functions of the compression library are documented in the file zlib.h
(volunteer to write man pages welcome, contact zlib@gzip.org). A usage example
-of the library is given in the file example.c which also tests that the library
-is working correctly. Another example is given in the file minigzip.c. The
-compression library itself is composed of all source files except example.c and
-minigzip.c.
+of the library is given in the file test/example.c which also tests that
+the library is working correctly. Another example is given in the file
+test/minigzip.c. The compression library itself is composed of all source
+files in the root directory.
To compile all files and run the test program, follow the instructions given at
the top of Makefile.in. In short "./configure; make test", and if that goes
-well, "make install" should work for most flavors of Unix. For Windows, use one
-of the special makefiles in win32/ or contrib/vstudio/ . For VMS, use
+well, "make install" should work for most flavors of Unix. For Windows, use
+one of the special makefiles in win32/ or contrib/vstudio/ . For VMS, use
make_vms.com.
Questions about zlib should be sent to <zlib@gzip.org>, or to Gilles Vollant
issue of Dr. Dobb's Journal; a copy of the article is available at
http://marknelson.us/1997/01/01/zlib-engine/ .
-The changes made in version 1.2.5 are documented in the file ChangeLog.
+The changes made in version 1.2.6 are documented in the file ChangeLog.
Unsupported third party contributions are provided in directory contrib/ .
A Python interface to zlib written by A.M. Kuchling <amk@amk.ca> is
available in Python 1.5 and later versions, see
-http://www.python.org/doc/lib/module-zlib.html .
+http://docs.python.org/library/zlib.html .
zlib is built into tcl: http://wiki.tcl.tk/4610 .
Copyright notice:
- (C) 1995-2010 Jean-loup Gailly and Mark Adler
+ (C) 1995-2012 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
/* adler32.c -- compute the Adler-32 checksum of a data stream
- * Copyright (C) 1995-2007 Mark Adler
+ * Copyright (C) 1995-2011 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#define local static
-local uLong adler32_combine_(uLong adler1, uLong adler2, z_off64_t len2);
+local uLong adler32_combine_ OF((uLong adler1, uLong adler2, z_off64_t len2));
-#define BASE 65521UL /* largest prime smaller than 65536 */
+#define BASE 65521 /* 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 */
#define DO8(buf,i) DO4(buf,i); DO4(buf,i+4);
#define DO16(buf) DO8(buf,0); DO8(buf,8);
-/* use NO_DIVIDE if your processor does not do division in hardware */
+/* use NO_DIVIDE if your processor does not do division in hardware --
+ try it both ways to see which is faster */
#ifdef NO_DIVIDE
-# define MOD(a) \
+/* note that this assumes BASE is 65521, where 65536 % 65521 == 15
+ (thank you to John Reiser for pointing this out) */
+# define CHOP(a) \
+ do { \
+ unsigned long tmp = a >> 16; \
+ a &= 0xffffUL; \
+ a += (tmp << 4) - tmp; \
+ } while (0)
+# define MOD28(a) \
do { \
- if (a >= (BASE << 16)) a -= (BASE << 16); \
- if (a >= (BASE << 15)) a -= (BASE << 15); \
- if (a >= (BASE << 14)) a -= (BASE << 14); \
- if (a >= (BASE << 13)) a -= (BASE << 13); \
- if (a >= (BASE << 12)) a -= (BASE << 12); \
- if (a >= (BASE << 11)) a -= (BASE << 11); \
- if (a >= (BASE << 10)) a -= (BASE << 10); \
- if (a >= (BASE << 9)) a -= (BASE << 9); \
- if (a >= (BASE << 8)) a -= (BASE << 8); \
- if (a >= (BASE << 7)) a -= (BASE << 7); \
- if (a >= (BASE << 6)) a -= (BASE << 6); \
- if (a >= (BASE << 5)) a -= (BASE << 5); \
- if (a >= (BASE << 4)) a -= (BASE << 4); \
- if (a >= (BASE << 3)) a -= (BASE << 3); \
- if (a >= (BASE << 2)) a -= (BASE << 2); \
- if (a >= (BASE << 1)) a -= (BASE << 1); \
+ CHOP(a); \
if (a >= BASE) a -= BASE; \
} while (0)
-# define MOD4(a) \
+# define MOD(a) \
do { \
- if (a >= (BASE << 4)) a -= (BASE << 4); \
- if (a >= (BASE << 3)) a -= (BASE << 3); \
- if (a >= (BASE << 2)) a -= (BASE << 2); \
- if (a >= (BASE << 1)) a -= (BASE << 1); \
+ CHOP(a); \
+ MOD28(a); \
+ } while (0)
+# define MOD63(a) \
+ do { /* this assumes a is not negative */ \
+ z_off64_t tmp = a >> 32; \
+ a &= 0xffffffffL; \
+ a += (tmp << 8) - (tmp << 5) + tmp; \
+ tmp = a >> 16; \
+ a &= 0xffffL; \
+ a += (tmp << 4) - tmp; \
+ tmp = a >> 16; \
+ a &= 0xffffL; \
+ a += (tmp << 4) - tmp; \
if (a >= BASE) a -= BASE; \
} while (0)
#else
# define MOD(a) a %= BASE
-# define MOD4(a) a %= BASE
+# define MOD28(a) a %= BASE
+# define MOD63(a) a %= BASE
#endif
/* ========================================================================= */
}
if (adler >= BASE)
adler -= BASE;
- MOD4(sum2); /* only added so many BASE's */
+ MOD28(sum2); /* only added so many BASE's */
return adler | (sum2 << 16);
}
unsigned long sum2;
unsigned rem;
+ /* for negative len, return invalid adler32 as a clue for debugging */
+ if (len2 < 0)
+ return 0xffffffffUL;
+
/* the derivation of this formula is left as an exercise for the reader */
- rem = (unsigned)(len2 % BASE);
+ MOD63(len2); /* assumes len2 >= 0 */
+ rem = (unsigned)len2;
sum1 = adler1 & 0xffff;
sum2 = rem * sum1;
MOD(sum2);
/* crc32.c -- compute the CRC-32 of a data stream
- * Copyright (C) 1995-2006, 2010 Mark Adler
+ * Copyright (C) 1995-2006, 2010, 2011 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
of the crc tables. Therefore, if you #define DYNAMIC_CRC_TABLE, you should
first call get_crc_table() to initialize the tables before allowing more than
one thread to use crc32().
+
+ DYNAMIC_CRC_TABLE and MAKECRCH can be #defined to write out crc32.h.
*/
#ifdef MAKECRCH
/* Definitions for doing the crc four data bytes at a time. */
#ifdef BYFOUR
+ typedef u4 crc_table_t;
# define REV(w) ((((w)>>24)&0xff)+(((w)>>8)&0xff00)+ \
(((w)&0xff00)<<8)+(((w)&0xff)<<24))
local unsigned long crc32_little OF((unsigned long,
const unsigned char FAR *, unsigned));
# define TBLS 8
#else
+ typedef unsigned long crc_table_t;
# define TBLS 1
#endif /* BYFOUR */
local unsigned long gf2_matrix_times OF((unsigned long *mat,
unsigned long vec));
local void gf2_matrix_square OF((unsigned long *square, unsigned long *mat));
-local uLong crc32_combine_(uLong crc1, uLong crc2, z_off64_t len2);
+local uLong crc32_combine_ OF((uLong crc1, uLong crc2, z_off64_t len2));
#ifdef DYNAMIC_CRC_TABLE
local volatile int crc_table_empty = 1;
-local unsigned long FAR crc_table[TBLS][256];
+local crc_table_t FAR crc_table[TBLS][256];
local void make_crc_table OF((void));
#ifdef MAKECRCH
- local void write_table OF((FILE *, const unsigned long FAR *));
+ local void write_table OF((FILE *, const crc_table_t FAR *));
#endif /* MAKECRCH */
/*
Generate tables for a byte-wise 32-bit CRC calculation on the polynomial:
*/
local void make_crc_table()
{
- unsigned long c;
+ crc_table_t c;
int n, k;
- unsigned long poly; /* polynomial exclusive-or pattern */
+ crc_table_t poly; /* polynomial exclusive-or pattern */
/* terms of polynomial defining this crc (except x^32): */
static volatile int first = 1; /* flag to limit concurrent making */
static const unsigned char p[] = {0,1,2,4,5,7,8,10,11,12,16,22,23,26};
first = 0;
/* make exclusive-or pattern from polynomial (0xedb88320UL) */
- poly = 0UL;
- for (n = 0; n < sizeof(p)/sizeof(unsigned char); n++)
- poly |= 1UL << (31 - p[n]);
+ poly = 0;
+ for (n = 0; n < (int)(sizeof(p)/sizeof(unsigned char)); n++)
+ poly |= (crc_table_t)1 << (31 - p[n]);
/* generate a crc for every 8-bit value */
for (n = 0; n < 256; n++) {
- c = (unsigned long)n;
+ c = (crc_table_t)n;
for (k = 0; k < 8; k++)
c = c & 1 ? poly ^ (c >> 1) : c >> 1;
crc_table[0][n] = c;
if (out == NULL) return;
fprintf(out, "/* crc32.h -- tables for rapid CRC calculation\n");
fprintf(out, " * Generated automatically by crc32.c\n */\n\n");
- fprintf(out, "local const unsigned long FAR ");
+ fprintf(out, "local const crc_table_t FAR ");
fprintf(out, "crc_table[TBLS][256] =\n{\n {\n");
write_table(out, crc_table[0]);
# ifdef BYFOUR
#ifdef MAKECRCH
local void write_table(out, table)
FILE *out;
- const unsigned long FAR *table;
+ const crc_table_t FAR *table;
{
int n;
for (n = 0; n < 256; n++)
- fprintf(out, "%s0x%08lxUL%s", n % 5 ? "" : " ", table[n],
+ fprintf(out, "%s0x%08lxUL%s", n % 5 ? "" : " ",
+ (unsigned long)(table[n]),
n == 255 ? "\n" : (n % 5 == 4 ? ",\n" : ", "));
}
#endif /* MAKECRCH */
* Generated automatically by crc32.c
*/
-local const unsigned long FAR crc_table[TBLS][256] =
+local const crc_table_t FAR crc_table[TBLS][256] =
{
{
0x00000000UL, 0x77073096UL, 0xee0e612cUL, 0x990951baUL, 0x076dc419UL,
/* deflate.c -- compress data using the deflation algorithm
- * Copyright (C) 1995-2010 Jean-loup Gailly and Mark Adler
+ * Copyright (C) 1995-2012 Jean-loup Gailly and Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
* REFERENCES
*
* Deutsch, L.P.,"DEFLATE Compressed Data Format Specification".
- * Available in http://www.ietf.org/rfc/rfc1951.txt
+ * Available in http://tools.ietf.org/html/rfc1951
*
* A description of the Rabin and Karp algorithm is given in the book
* "Algorithms" by R. Sedgewick, Addison-Wesley, p252.
#include "deflate.h"
const char deflate_copyright[] =
- " deflate 1.2.5 Copyright 1995-2010 Jean-loup Gailly and Mark Adler ";
+ " deflate 1.2.6 Copyright 1995-2012 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
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))
+
/* ===========================================================================
* Update a hash value with the given input byte
* IN assertion: all calls to to UPDATE_HASH are made with consecutive
strm->msg = Z_NULL;
if (strm->zalloc == (alloc_func)0) {
+#ifdef Z_SOLO
+ return Z_STREAM_ERROR;
+#else
strm->zalloc = zcalloc;
strm->opaque = (voidpf)0;
+#endif
}
- if (strm->zfree == (free_func)0) strm->zfree = zcfree;
+ if (strm->zfree == (free_func)0)
+#ifdef Z_SOLO
+ return Z_STREAM_ERROR;
+#else
+ strm->zfree = zcfree;
+#endif
#ifdef FASTEST
if (level != 0) level = 1;
uInt dictLength;
{
deflate_state *s;
- uInt length = dictLength;
- uInt n;
- IPos hash_head = 0;
+ uInt str, n;
+ int wrap;
+ unsigned avail;
+ unsigned char *next;
- if (strm == Z_NULL || strm->state == Z_NULL || dictionary == Z_NULL ||
- strm->state->wrap == 2 ||
- (strm->state->wrap == 1 && strm->state->status != INIT_STATE))
+ if (strm == Z_NULL || strm->state == Z_NULL || dictionary == Z_NULL)
return Z_STREAM_ERROR;
-
s = strm->state;
- if (s->wrap)
- strm->adler = adler32(strm->adler, dictionary, dictLength);
+ wrap = s->wrap;
+ if (wrap == 2 || (wrap == 1 && s->status != INIT_STATE) || s->lookahead)
+ return Z_STREAM_ERROR;
- if (length < MIN_MATCH) return Z_OK;
- if (length > s->w_size) {
- length = s->w_size;
- dictionary += dictLength - length; /* use the tail of the dictionary */
+ /* when using zlib wrappers, compute Adler-32 for provided dictionary */
+ if (wrap == 1)
+ strm->adler = adler32(strm->adler, dictionary, dictLength);
+ s->wrap = 0; /* avoid computing Adler-32 in read_buf */
+
+ /* if dictionary would fill window, just replace the history */
+ if (dictLength >= s->w_size) {
+ if (wrap == 0) { /* already empty otherwise */
+ CLEAR_HASH(s);
+ s->strstart = 0;
+ s->block_start = 0L;
+ s->insert = 0;
+ }
+ dictionary += dictLength - s->w_size; /* use the tail */
+ dictLength = s->w_size;
}
- zmemcpy(s->window, dictionary, length);
- s->strstart = length;
- s->block_start = (long)length;
- /* Insert all strings in the hash table (except for the last two bytes).
- * s->lookahead stays null, so s->ins_h will be recomputed at the next
- * call of fill_window.
- */
- s->ins_h = s->window[0];
- UPDATE_HASH(s, s->ins_h, s->window[1]);
- for (n = 0; n <= length - MIN_MATCH; n++) {
- INSERT_STRING(s, n, hash_head);
+ /* insert dictionary into window and hash */
+ avail = strm->avail_in;
+ next = strm->next_in;
+ strm->avail_in = dictLength;
+ strm->next_in = (Bytef *)dictionary;
+ fill_window(s);
+ while (s->lookahead >= MIN_MATCH) {
+ str = s->strstart;
+ n = s->lookahead - (MIN_MATCH-1);
+ do {
+ UPDATE_HASH(s, s->ins_h, s->window[str + MIN_MATCH-1]);
+#ifndef FASTEST
+ s->prev[str & s->w_mask] = s->head[s->ins_h];
+#endif
+ s->head[s->ins_h] = (Pos)str;
+ str++;
+ } while (--n);
+ s->strstart = str;
+ s->lookahead = MIN_MATCH-1;
+ fill_window(s);
}
- if (hash_head) hash_head = 0; /* to make compiler happy */
+ s->strstart += s->lookahead;
+ s->block_start = (long)s->strstart;
+ s->insert = s->lookahead;
+ s->lookahead = 0;
+ s->match_length = s->prev_length = MIN_MATCH-1;
+ s->match_available = 0;
+ strm->next_in = next;
+ strm->avail_in = avail;
+ s->wrap = wrap;
return Z_OK;
}
/* ========================================================================= */
-int ZEXPORT deflateReset (strm)
+int ZEXPORT deflateResetKeep (strm)
z_streamp strm;
{
deflate_state *s;
s->last_flush = Z_NO_FLUSH;
_tr_init(s);
- lm_init(s);
return Z_OK;
}
+/* ========================================================================= */
+int ZEXPORT deflateReset (strm)
+ z_streamp strm;
+{
+ int ret;
+
+ ret = deflateResetKeep(strm);
+ if (ret == Z_OK)
+ lm_init(strm->state);
+ return ret;
+}
+
/* ========================================================================= */
int ZEXPORT deflateSetHeader (strm, head)
z_streamp strm;
return Z_OK;
}
+/* ========================================================================= */
+int ZEXPORT deflatePending (strm, pending, bits)
+ unsigned *pending;
+ int *bits;
+ z_streamp strm;
+{
+ if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ if (pending != Z_NULL)
+ *pending = strm->state->pending;
+ if (bits != Z_NULL)
+ *bits = strm->state->bi_valid;
+ return Z_OK;
+}
+
/* ========================================================================= */
int ZEXPORT deflatePrime (strm, bits, value)
z_streamp strm;
int bits;
int value;
{
+ deflate_state *s;
+ int put;
+
if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
- strm->state->bi_valid = bits;
- strm->state->bi_buf = (ush)(value & ((1 << bits) - 1));
+ s = strm->state;
+ if ((Bytef *)(s->d_buf) < s->pending_out + ((Buf_size + 7) >> 3))
+ return Z_BUF_ERROR;
+ do {
+ put = Buf_size - s->bi_valid;
+ if (put > bits)
+ put = bits;
+ s->bi_buf |= (ush)((value & ((1 << put) - 1)) << s->bi_valid);
+ s->bi_valid += put;
+ _tr_flush_bits(s);
+ value >>= put;
+ bits -= put;
+ } while (bits);
return Z_OK;
}
local void flush_pending(strm)
z_streamp strm;
{
- unsigned len = strm->state->pending;
+ unsigned len;
+ deflate_state *s = strm->state;
+ _tr_flush_bits(s);
+ len = s->pending;
if (len > strm->avail_out) len = strm->avail_out;
if (len == 0) return;
- zmemcpy(strm->next_out, strm->state->pending_out, len);
+ zmemcpy(strm->next_out, s->pending_out, len);
strm->next_out += len;
- strm->state->pending_out += len;
+ s->pending_out += len;
strm->total_out += len;
strm->avail_out -= len;
- strm->state->pending -= len;
- if (strm->state->pending == 0) {
- strm->state->pending_out = strm->state->pending_buf;
+ s->pending -= len;
+ if (s->pending == 0) {
+ s->pending_out = s->pending_buf;
}
}
* flushes. For repeated and useless calls with Z_FINISH, we keep
* returning Z_STREAM_END instead of Z_BUF_ERROR.
*/
- } else if (strm->avail_in == 0 && flush <= old_flush &&
+ } else if (strm->avail_in == 0 && RANK(flush) <= RANK(old_flush) &&
flush != Z_FINISH) {
ERR_RETURN(strm, Z_BUF_ERROR);
}
if (s->lookahead == 0) {
s->strstart = 0;
s->block_start = 0L;
+ s->insert = 0;
}
}
}
ss = source->state;
- zmemcpy(dest, source, sizeof(z_stream));
+ zmemcpy((voidpf)dest, (voidpf)source, sizeof(z_stream));
ds = (deflate_state *) ZALLOC(dest, 1, sizeof(deflate_state));
if (ds == Z_NULL) return Z_MEM_ERROR;
dest->state = (struct internal_state FAR *) ds;
- zmemcpy(ds, ss, sizeof(deflate_state));
+ zmemcpy((voidpf)ds, (voidpf)ss, sizeof(deflate_state));
ds->strm = dest;
ds->window = (Bytef *) ZALLOC(dest, ds->w_size, 2*sizeof(Byte));
}
/* following zmemcpy do not work for 16-bit MSDOS */
zmemcpy(ds->window, ss->window, ds->w_size * 2 * sizeof(Byte));
- zmemcpy(ds->prev, ss->prev, ds->w_size * sizeof(Pos));
- zmemcpy(ds->head, ss->head, ds->hash_size * sizeof(Pos));
+ zmemcpy((voidpf)ds->prev, (voidpf)ss->prev, ds->w_size * sizeof(Pos));
+ zmemcpy((voidpf)ds->head, (voidpf)ss->head, ds->hash_size * sizeof(Pos));
zmemcpy(ds->pending_buf, ss->pending_buf, (uInt)ds->pending_buf_size);
ds->pending_out = ds->pending_buf + (ss->pending_out - ss->pending_buf);
strm->avail_in -= len;
+ zmemcpy(buf, strm->next_in, len);
if (strm->state->wrap == 1) {
- strm->adler = adler32(strm->adler, strm->next_in, len);
+ strm->adler = adler32(strm->adler, buf, len);
}
#ifdef GZIP
else if (strm->state->wrap == 2) {
- strm->adler = crc32(strm->adler, strm->next_in, len);
+ strm->adler = crc32(strm->adler, buf, len);
}
#endif
- zmemcpy(buf, strm->next_in, len);
strm->next_in += len;
strm->total_in += len;
s->strstart = 0;
s->block_start = 0L;
s->lookahead = 0;
+ s->insert = 0;
s->match_length = s->prev_length = MIN_MATCH-1;
s->match_available = 0;
s->ins_h = 0;
unsigned more; /* Amount of free space at the end of the window. */
uInt wsize = s->w_size;
+ Assert(s->lookahead < MIN_LOOKAHEAD, "already enough lookahead");
+
do {
more = (unsigned)(s->window_size -(ulg)s->lookahead -(ulg)s->strstart);
#endif
more += wsize;
}
- if (s->strm->avail_in == 0) return;
+ if (s->strm->avail_in == 0) break;
/* If there was no sliding:
* strstart <= WSIZE+MAX_DIST-1 && lookahead <= MIN_LOOKAHEAD - 1 &&
s->lookahead += n;
/* Initialize the hash value now that we have some input: */
- if (s->lookahead >= MIN_MATCH) {
- s->ins_h = s->window[s->strstart];
- UPDATE_HASH(s, s->ins_h, s->window[s->strstart+1]);
+ if (s->lookahead + s->insert >= MIN_MATCH) {
+ uInt str = s->strstart - s->insert;
+ s->ins_h = s->window[str];
+ UPDATE_HASH(s, s->ins_h, s->window[str + 1]);
#if MIN_MATCH != 3
Call UPDATE_HASH() MIN_MATCH-3 more times
#endif
+ while (s->insert) {
+ UPDATE_HASH(s, s->ins_h, s->window[str + MIN_MATCH-1]);
+#ifndef FASTEST
+ s->prev[str & s->w_mask] = s->head[s->ins_h];
+#endif
+ s->head[s->ins_h] = (Pos)str;
+ str++;
+ s->insert--;
+ if (s->lookahead + s->insert < MIN_MATCH)
+ break;
+ }
}
/* If the whole input has less than MIN_MATCH bytes, ins_h is garbage,
* but this is not important since only literal bytes will be emitted.
s->high_water += init;
}
}
+
+ Assert((ulg)s->strstart <= s->window_size - MIN_LOOKAHEAD,
+ "not enough room for search");
}
/* ===========================================================================
FLUSH_BLOCK(s, 0);
}
}
- FLUSH_BLOCK(s, flush == Z_FINISH);
- return flush == Z_FINISH ? finish_done : block_done;
+ s->insert = 0;
+ if (flush == Z_FINISH) {
+ FLUSH_BLOCK(s, 1);
+ return finish_done;
+ }
+ if ((long)s->strstart > s->block_start)
+ FLUSH_BLOCK(s, 0);
+ return block_done;
}
/* ===========================================================================
}
if (bflush) FLUSH_BLOCK(s, 0);
}
- FLUSH_BLOCK(s, flush == Z_FINISH);
- return flush == Z_FINISH ? finish_done : block_done;
+ s->insert = s->strstart < MIN_MATCH-1 ? s->strstart : MIN_MATCH-1;
+ if (flush == Z_FINISH) {
+ FLUSH_BLOCK(s, 1);
+ return finish_done;
+ }
+ if (s->last_lit)
+ FLUSH_BLOCK(s, 0);
+ return block_done;
}
#ifndef FASTEST
_tr_tally_lit(s, s->window[s->strstart-1], bflush);
s->match_available = 0;
}
- FLUSH_BLOCK(s, flush == Z_FINISH);
- return flush == Z_FINISH ? finish_done : block_done;
+ s->insert = s->strstart < MIN_MATCH-1 ? s->strstart : MIN_MATCH-1;
+ if (flush == Z_FINISH) {
+ FLUSH_BLOCK(s, 1);
+ return finish_done;
+ }
+ if (s->last_lit)
+ FLUSH_BLOCK(s, 0);
+ return block_done;
}
#endif /* FASTEST */
for (;;) {
/* Make sure that we always have enough lookahead, except
* at the end of the input file. We need MAX_MATCH bytes
- * for the longest encodable run.
+ * for the longest run, plus one for the unrolled loop.
*/
- if (s->lookahead < MAX_MATCH) {
+ if (s->lookahead <= MAX_MATCH) {
fill_window(s);
- if (s->lookahead < MAX_MATCH && flush == Z_NO_FLUSH) {
+ if (s->lookahead <= MAX_MATCH && flush == Z_NO_FLUSH) {
return need_more;
}
if (s->lookahead == 0) break; /* flush the current block */
if (s->match_length > s->lookahead)
s->match_length = s->lookahead;
}
+ Assert(scan <= s->window+(uInt)(s->window_size-1), "wild scan");
}
/* Emit match if have run of MIN_MATCH or longer, else emit literal */
}
if (bflush) FLUSH_BLOCK(s, 0);
}
- FLUSH_BLOCK(s, flush == Z_FINISH);
- return flush == Z_FINISH ? finish_done : block_done;
+ s->insert = 0;
+ if (flush == Z_FINISH) {
+ FLUSH_BLOCK(s, 1);
+ return finish_done;
+ }
+ if (s->last_lit)
+ FLUSH_BLOCK(s, 0);
+ return block_done;
}
/* ===========================================================================
s->strstart++;
if (bflush) FLUSH_BLOCK(s, 0);
}
- FLUSH_BLOCK(s, flush == Z_FINISH);
- return flush == Z_FINISH ? finish_done : block_done;
+ s->insert = 0;
+ if (flush == Z_FINISH) {
+ FLUSH_BLOCK(s, 1);
+ return finish_done;
+ }
+ if (s->last_lit)
+ FLUSH_BLOCK(s, 0);
+ return block_done;
}
/* deflate.h -- internal compression state
- * Copyright (C) 1995-2010 Jean-loup Gailly
+ * Copyright (C) 1995-2012 Jean-loup Gailly
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#define MAX_BITS 15
/* All codes must not exceed MAX_BITS bits */
+#define Buf_size 16
+/* size of bit buffer in bi_buf */
+
#define INIT_STATE 42
#define EXTRA_STATE 69
#define NAME_STATE 73
int nice_match; /* Stop searching when current match exceeds this */
/* used by trees.c: */
- /* Didn't use ct_data typedef below to supress compiler warning */
+ /* Didn't use ct_data typedef below to suppress compiler warning */
struct ct_data_s dyn_ltree[HEAP_SIZE]; /* literal and length tree */
struct ct_data_s dyn_dtree[2*D_CODES+1]; /* distance tree */
struct ct_data_s bl_tree[2*BL_CODES+1]; /* Huffman tree for bit lengths */
ulg opt_len; /* bit length of current block with optimal trees */
ulg static_len; /* bit length of current block with static trees */
uInt matches; /* number of string matches in current block */
- int last_eob_len; /* bit length of EOB code for last block */
+ uInt insert; /* bytes at end of window left to insert */
#ifdef DEBUG
ulg compressed_len; /* total bit length of compressed file mod 2^32 */
int ZLIB_INTERNAL _tr_tally OF((deflate_state *s, unsigned dist, unsigned lc));
void ZLIB_INTERNAL _tr_flush_block OF((deflate_state *s, charf *buf,
ulg stored_len, int last));
+void ZLIB_INTERNAL _tr_flush_bits OF((deflate_state *s));
void ZLIB_INTERNAL _tr_align OF((deflate_state *s));
void ZLIB_INTERNAL _tr_stored_block OF((deflate_state *s, charf *buf,
ulg stored_len, int last));
+++ /dev/null
-/* example.c -- usage example of the zlib compression library
- * Copyright (C) 1995-2006 Jean-loup Gailly.
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/* @(#) $Id$ */
-
-#include "zlib.h"
-#include <stdio.h>
-
-#ifdef STDC
-# include <string.h>
-# include <stdlib.h>
-#endif
-
-#if defined(VMS) || defined(RISCOS)
-# define TESTFILE "foo-gz"
-#else
-# define TESTFILE "foo.gz"
-#endif
-
-#define CHECK_ERR(err, msg) { \
- if (err != Z_OK) { \
- fprintf(stderr, "%s error: %d\n", msg, err); \
- exit(1); \
- } \
-}
-
-const char hello[] = "hello, hello!";
-/* "hello world" would be more standard, but the repeated "hello"
- * stresses the compression code better, sorry...
- */
-
-const char dictionary[] = "hello";
-uLong dictId; /* Adler32 value of the dictionary */
-
-void test_compress OF((Byte *compr, uLong comprLen,
- Byte *uncompr, uLong uncomprLen));
-void test_gzio OF((const char *fname,
- Byte *uncompr, uLong uncomprLen));
-void test_deflate OF((Byte *compr, uLong comprLen));
-void test_inflate OF((Byte *compr, uLong comprLen,
- Byte *uncompr, uLong uncomprLen));
-void test_large_deflate OF((Byte *compr, uLong comprLen,
- Byte *uncompr, uLong uncomprLen));
-void test_large_inflate OF((Byte *compr, uLong comprLen,
- Byte *uncompr, uLong uncomprLen));
-void test_flush OF((Byte *compr, uLong *comprLen));
-void test_sync OF((Byte *compr, uLong comprLen,
- Byte *uncompr, uLong uncomprLen));
-void test_dict_deflate OF((Byte *compr, uLong comprLen));
-void test_dict_inflate OF((Byte *compr, uLong comprLen,
- Byte *uncompr, uLong uncomprLen));
-int main OF((int argc, char *argv[]));
-
-/* ===========================================================================
- * Test compress() and uncompress()
- */
-void test_compress(compr, comprLen, uncompr, uncomprLen)
- Byte *compr, *uncompr;
- uLong comprLen, uncomprLen;
-{
- int err;
- uLong len = (uLong)strlen(hello)+1;
-
- err = compress(compr, &comprLen, (const Bytef*)hello, len);
- CHECK_ERR(err, "compress");
-
- strcpy((char*)uncompr, "garbage");
-
- err = uncompress(uncompr, &uncomprLen, compr, comprLen);
- CHECK_ERR(err, "uncompress");
-
- if (strcmp((char*)uncompr, hello)) {
- fprintf(stderr, "bad uncompress\n");
- exit(1);
- } else {
- printf("uncompress(): %s\n", (char *)uncompr);
- }
-}
-
-/* ===========================================================================
- * Test read/write of .gz files
- */
-void test_gzio(fname, uncompr, uncomprLen)
- const char *fname; /* compressed file name */
- Byte *uncompr;
- uLong uncomprLen;
-{
-#ifdef NO_GZCOMPRESS
- fprintf(stderr, "NO_GZCOMPRESS -- gz* functions cannot compress\n");
-#else
- int err;
- int len = (int)strlen(hello)+1;
- gzFile file;
- z_off_t pos;
-
- file = gzopen(fname, "wb");
- if (file == NULL) {
- fprintf(stderr, "gzopen error\n");
- exit(1);
- }
- gzputc(file, 'h');
- if (gzputs(file, "ello") != 4) {
- fprintf(stderr, "gzputs err: %s\n", gzerror(file, &err));
- exit(1);
- }
- if (gzprintf(file, ", %s!", "hello") != 8) {
- fprintf(stderr, "gzprintf err: %s\n", gzerror(file, &err));
- exit(1);
- }
- gzseek(file, 1L, SEEK_CUR); /* add one zero byte */
- gzclose(file);
-
- file = gzopen(fname, "rb");
- if (file == NULL) {
- fprintf(stderr, "gzopen error\n");
- exit(1);
- }
- strcpy((char*)uncompr, "garbage");
-
- if (gzread(file, uncompr, (unsigned)uncomprLen) != len) {
- fprintf(stderr, "gzread err: %s\n", gzerror(file, &err));
- exit(1);
- }
- if (strcmp((char*)uncompr, hello)) {
- fprintf(stderr, "bad gzread: %s\n", (char*)uncompr);
- exit(1);
- } else {
- printf("gzread(): %s\n", (char*)uncompr);
- }
-
- pos = gzseek(file, -8L, SEEK_CUR);
- if (pos != 6 || gztell(file) != pos) {
- fprintf(stderr, "gzseek error, pos=%ld, gztell=%ld\n",
- (long)pos, (long)gztell(file));
- exit(1);
- }
-
- if (gzgetc(file) != ' ') {
- fprintf(stderr, "gzgetc error\n");
- exit(1);
- }
-
- if (gzungetc(' ', file) != ' ') {
- fprintf(stderr, "gzungetc error\n");
- exit(1);
- }
-
- gzgets(file, (char*)uncompr, (int)uncomprLen);
- if (strlen((char*)uncompr) != 7) { /* " hello!" */
- fprintf(stderr, "gzgets err after gzseek: %s\n", gzerror(file, &err));
- exit(1);
- }
- if (strcmp((char*)uncompr, hello + 6)) {
- fprintf(stderr, "bad gzgets after gzseek\n");
- exit(1);
- } else {
- printf("gzgets() after gzseek: %s\n", (char*)uncompr);
- }
-
- gzclose(file);
-#endif
-}
-
-/* ===========================================================================
- * Test deflate() with small buffers
- */
-void test_deflate(compr, comprLen)
- Byte *compr;
- uLong comprLen;
-{
- z_stream c_stream; /* compression stream */
- int err;
- uLong len = (uLong)strlen(hello)+1;
-
- c_stream.zalloc = (alloc_func)0;
- c_stream.zfree = (free_func)0;
- c_stream.opaque = (voidpf)0;
-
- err = deflateInit(&c_stream, Z_DEFAULT_COMPRESSION);
- CHECK_ERR(err, "deflateInit");
-
- c_stream.next_in = (Bytef*)hello;
- c_stream.next_out = compr;
-
- while (c_stream.total_in != len && c_stream.total_out < comprLen) {
- c_stream.avail_in = c_stream.avail_out = 1; /* force small buffers */
- err = deflate(&c_stream, Z_NO_FLUSH);
- CHECK_ERR(err, "deflate");
- }
- /* Finish the stream, still forcing small buffers: */
- for (;;) {
- c_stream.avail_out = 1;
- err = deflate(&c_stream, Z_FINISH);
- if (err == Z_STREAM_END) break;
- CHECK_ERR(err, "deflate");
- }
-
- err = deflateEnd(&c_stream);
- CHECK_ERR(err, "deflateEnd");
-}
-
-/* ===========================================================================
- * Test inflate() with small buffers
- */
-void test_inflate(compr, comprLen, uncompr, uncomprLen)
- Byte *compr, *uncompr;
- uLong comprLen, uncomprLen;
-{
- int err;
- z_stream d_stream; /* decompression stream */
-
- strcpy((char*)uncompr, "garbage");
-
- d_stream.zalloc = (alloc_func)0;
- d_stream.zfree = (free_func)0;
- d_stream.opaque = (voidpf)0;
-
- d_stream.next_in = compr;
- d_stream.avail_in = 0;
- d_stream.next_out = uncompr;
-
- err = inflateInit(&d_stream);
- CHECK_ERR(err, "inflateInit");
-
- while (d_stream.total_out < uncomprLen && d_stream.total_in < comprLen) {
- d_stream.avail_in = d_stream.avail_out = 1; /* force small buffers */
- err = inflate(&d_stream, Z_NO_FLUSH);
- if (err == Z_STREAM_END) break;
- CHECK_ERR(err, "inflate");
- }
-
- err = inflateEnd(&d_stream);
- CHECK_ERR(err, "inflateEnd");
-
- if (strcmp((char*)uncompr, hello)) {
- fprintf(stderr, "bad inflate\n");
- exit(1);
- } else {
- printf("inflate(): %s\n", (char *)uncompr);
- }
-}
-
-/* ===========================================================================
- * Test deflate() with large buffers and dynamic change of compression level
- */
-void test_large_deflate(compr, comprLen, uncompr, uncomprLen)
- Byte *compr, *uncompr;
- uLong comprLen, uncomprLen;
-{
- z_stream c_stream; /* compression stream */
- int err;
-
- c_stream.zalloc = (alloc_func)0;
- c_stream.zfree = (free_func)0;
- c_stream.opaque = (voidpf)0;
-
- err = deflateInit(&c_stream, Z_BEST_SPEED);
- CHECK_ERR(err, "deflateInit");
-
- c_stream.next_out = compr;
- c_stream.avail_out = (uInt)comprLen;
-
- /* At this point, uncompr is still mostly zeroes, so it should compress
- * very well:
- */
- c_stream.next_in = uncompr;
- c_stream.avail_in = (uInt)uncomprLen;
- err = deflate(&c_stream, Z_NO_FLUSH);
- CHECK_ERR(err, "deflate");
- if (c_stream.avail_in != 0) {
- fprintf(stderr, "deflate not greedy\n");
- exit(1);
- }
-
- /* Feed in already compressed data and switch to no compression: */
- deflateParams(&c_stream, Z_NO_COMPRESSION, Z_DEFAULT_STRATEGY);
- c_stream.next_in = compr;
- c_stream.avail_in = (uInt)comprLen/2;
- err = deflate(&c_stream, Z_NO_FLUSH);
- CHECK_ERR(err, "deflate");
-
- /* Switch back to compressing mode: */
- deflateParams(&c_stream, Z_BEST_COMPRESSION, Z_FILTERED);
- c_stream.next_in = uncompr;
- c_stream.avail_in = (uInt)uncomprLen;
- err = deflate(&c_stream, Z_NO_FLUSH);
- CHECK_ERR(err, "deflate");
-
- err = deflate(&c_stream, Z_FINISH);
- if (err != Z_STREAM_END) {
- fprintf(stderr, "deflate should report Z_STREAM_END\n");
- exit(1);
- }
- err = deflateEnd(&c_stream);
- CHECK_ERR(err, "deflateEnd");
-}
-
-/* ===========================================================================
- * Test inflate() with large buffers
- */
-void test_large_inflate(compr, comprLen, uncompr, uncomprLen)
- Byte *compr, *uncompr;
- uLong comprLen, uncomprLen;
-{
- int err;
- z_stream d_stream; /* decompression stream */
-
- strcpy((char*)uncompr, "garbage");
-
- d_stream.zalloc = (alloc_func)0;
- d_stream.zfree = (free_func)0;
- d_stream.opaque = (voidpf)0;
-
- d_stream.next_in = compr;
- d_stream.avail_in = (uInt)comprLen;
-
- err = inflateInit(&d_stream);
- CHECK_ERR(err, "inflateInit");
-
- for (;;) {
- d_stream.next_out = uncompr; /* discard the output */
- d_stream.avail_out = (uInt)uncomprLen;
- err = inflate(&d_stream, Z_NO_FLUSH);
- if (err == Z_STREAM_END) break;
- CHECK_ERR(err, "large inflate");
- }
-
- err = inflateEnd(&d_stream);
- CHECK_ERR(err, "inflateEnd");
-
- if (d_stream.total_out != 2*uncomprLen + comprLen/2) {
- fprintf(stderr, "bad large inflate: %ld\n", d_stream.total_out);
- exit(1);
- } else {
- printf("large_inflate(): OK\n");
- }
-}
-
-/* ===========================================================================
- * Test deflate() with full flush
- */
-void test_flush(compr, comprLen)
- Byte *compr;
- uLong *comprLen;
-{
- z_stream c_stream; /* compression stream */
- int err;
- uInt len = (uInt)strlen(hello)+1;
-
- c_stream.zalloc = (alloc_func)0;
- c_stream.zfree = (free_func)0;
- c_stream.opaque = (voidpf)0;
-
- err = deflateInit(&c_stream, Z_DEFAULT_COMPRESSION);
- CHECK_ERR(err, "deflateInit");
-
- c_stream.next_in = (Bytef*)hello;
- c_stream.next_out = compr;
- c_stream.avail_in = 3;
- c_stream.avail_out = (uInt)*comprLen;
- err = deflate(&c_stream, Z_FULL_FLUSH);
- CHECK_ERR(err, "deflate");
-
- compr[3]++; /* force an error in first compressed block */
- c_stream.avail_in = len - 3;
-
- err = deflate(&c_stream, Z_FINISH);
- if (err != Z_STREAM_END) {
- CHECK_ERR(err, "deflate");
- }
- err = deflateEnd(&c_stream);
- CHECK_ERR(err, "deflateEnd");
-
- *comprLen = c_stream.total_out;
-}
-
-/* ===========================================================================
- * Test inflateSync()
- */
-void test_sync(compr, comprLen, uncompr, uncomprLen)
- Byte *compr, *uncompr;
- uLong comprLen, uncomprLen;
-{
- int err;
- z_stream d_stream; /* decompression stream */
-
- strcpy((char*)uncompr, "garbage");
-
- d_stream.zalloc = (alloc_func)0;
- d_stream.zfree = (free_func)0;
- d_stream.opaque = (voidpf)0;
-
- d_stream.next_in = compr;
- d_stream.avail_in = 2; /* just read the zlib header */
-
- err = inflateInit(&d_stream);
- CHECK_ERR(err, "inflateInit");
-
- d_stream.next_out = uncompr;
- d_stream.avail_out = (uInt)uncomprLen;
-
- inflate(&d_stream, Z_NO_FLUSH);
- CHECK_ERR(err, "inflate");
-
- d_stream.avail_in = (uInt)comprLen-2; /* read all compressed data */
- err = inflateSync(&d_stream); /* but skip the damaged part */
- CHECK_ERR(err, "inflateSync");
-
- err = inflate(&d_stream, Z_FINISH);
- if (err != Z_DATA_ERROR) {
- fprintf(stderr, "inflate should report DATA_ERROR\n");
- /* Because of incorrect adler32 */
- exit(1);
- }
- err = inflateEnd(&d_stream);
- CHECK_ERR(err, "inflateEnd");
-
- printf("after inflateSync(): hel%s\n", (char *)uncompr);
-}
-
-/* ===========================================================================
- * Test deflate() with preset dictionary
- */
-void test_dict_deflate(compr, comprLen)
- Byte *compr;
- uLong comprLen;
-{
- z_stream c_stream; /* compression stream */
- int err;
-
- c_stream.zalloc = (alloc_func)0;
- c_stream.zfree = (free_func)0;
- c_stream.opaque = (voidpf)0;
-
- err = deflateInit(&c_stream, Z_BEST_COMPRESSION);
- CHECK_ERR(err, "deflateInit");
-
- err = deflateSetDictionary(&c_stream,
- (const Bytef*)dictionary, sizeof(dictionary));
- CHECK_ERR(err, "deflateSetDictionary");
-
- dictId = c_stream.adler;
- c_stream.next_out = compr;
- c_stream.avail_out = (uInt)comprLen;
-
- c_stream.next_in = (Bytef*)hello;
- c_stream.avail_in = (uInt)strlen(hello)+1;
-
- err = deflate(&c_stream, Z_FINISH);
- if (err != Z_STREAM_END) {
- fprintf(stderr, "deflate should report Z_STREAM_END\n");
- exit(1);
- }
- err = deflateEnd(&c_stream);
- CHECK_ERR(err, "deflateEnd");
-}
-
-/* ===========================================================================
- * Test inflate() with a preset dictionary
- */
-void test_dict_inflate(compr, comprLen, uncompr, uncomprLen)
- Byte *compr, *uncompr;
- uLong comprLen, uncomprLen;
-{
- int err;
- z_stream d_stream; /* decompression stream */
-
- strcpy((char*)uncompr, "garbage");
-
- d_stream.zalloc = (alloc_func)0;
- d_stream.zfree = (free_func)0;
- d_stream.opaque = (voidpf)0;
-
- d_stream.next_in = compr;
- d_stream.avail_in = (uInt)comprLen;
-
- err = inflateInit(&d_stream);
- CHECK_ERR(err, "inflateInit");
-
- d_stream.next_out = uncompr;
- d_stream.avail_out = (uInt)uncomprLen;
-
- for (;;) {
- err = inflate(&d_stream, Z_NO_FLUSH);
- if (err == Z_STREAM_END) break;
- if (err == Z_NEED_DICT) {
- if (d_stream.adler != dictId) {
- fprintf(stderr, "unexpected dictionary");
- exit(1);
- }
- err = inflateSetDictionary(&d_stream, (const Bytef*)dictionary,
- sizeof(dictionary));
- }
- CHECK_ERR(err, "inflate with dict");
- }
-
- err = inflateEnd(&d_stream);
- CHECK_ERR(err, "inflateEnd");
-
- if (strcmp((char*)uncompr, hello)) {
- fprintf(stderr, "bad inflate with dict\n");
- exit(1);
- } else {
- printf("inflate with dictionary: %s\n", (char *)uncompr);
- }
-}
-
-/* ===========================================================================
- * Usage: example [output.gz [input.gz]]
- */
-
-int main(argc, argv)
- int argc;
- char *argv[];
-{
- Byte *compr, *uncompr;
- uLong comprLen = 10000*sizeof(int); /* don't overflow on MSDOS */
- uLong uncomprLen = comprLen;
- static const char* myVersion = ZLIB_VERSION;
-
- if (zlibVersion()[0] != myVersion[0]) {
- fprintf(stderr, "incompatible zlib version\n");
- exit(1);
-
- } else if (strcmp(zlibVersion(), ZLIB_VERSION) != 0) {
- fprintf(stderr, "warning: different zlib version\n");
- }
-
- printf("zlib version %s = 0x%04x, compile flags = 0x%lx\n",
- ZLIB_VERSION, ZLIB_VERNUM, zlibCompileFlags());
-
- compr = (Byte*)calloc((uInt)comprLen, 1);
- uncompr = (Byte*)calloc((uInt)uncomprLen, 1);
- /* compr and uncompr are cleared to avoid reading uninitialized
- * data and to ensure that uncompr compresses well.
- */
- if (compr == Z_NULL || uncompr == Z_NULL) {
- printf("out of memory\n");
- exit(1);
- }
- test_compress(compr, comprLen, uncompr, uncomprLen);
-
- test_gzio((argc > 1 ? argv[1] : TESTFILE),
- uncompr, uncomprLen);
-
- test_deflate(compr, comprLen);
- test_inflate(compr, comprLen, uncompr, uncomprLen);
-
- test_large_deflate(compr, comprLen, uncompr, uncomprLen);
- test_large_inflate(compr, comprLen, uncompr, uncomprLen);
-
- test_flush(compr, &comprLen);
- test_sync(compr, comprLen, uncompr, uncomprLen);
- comprLen = uncomprLen;
-
- test_dict_deflate(compr, comprLen);
- test_dict_inflate(compr, comprLen, uncompr, uncomprLen);
-
- free(compr);
- free(uncompr);
-
- return 0;
-}
/* gzguts.h -- zlib internal header definitions for gz* operations
- * Copyright (C) 2004, 2005, 2010 Mark Adler
+ * Copyright (C) 2004, 2005, 2010, 2011, 2012 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#endif
#include <fcntl.h>
+#ifdef __TURBOC__
+# include <io.h>
+#endif
+
#ifdef NO_DEFLATE /* for compatibility with old definition */
# define NO_GZCOMPRESS
#endif
-#ifdef _MSC_VER
-# include <io.h>
-# define vsnprintf _vsnprintf
+#if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
+# ifndef HAVE_VSNPRINTF
+# define HAVE_VSNPRINTF
+# endif
+#endif
+
+#if defined(__CYGWIN__)
+# ifndef HAVE_VSNPRINTF
+# define HAVE_VSNPRINTF
+# endif
+#endif
+
+#if defined(MSDOS) && defined(__BORLANDC__) && (BORLANDC > 0x410)
+# ifndef HAVE_VSNPRINTF
+# define HAVE_VSNPRINTF
+# endif
+#endif
+
+#ifndef HAVE_VSNPRINTF
+# ifdef MSDOS
+/* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
+ but for now we just assume it doesn't. */
+# define NO_vsnprintf
+# endif
+# ifdef __TURBOC__
+# define NO_vsnprintf
+# endif
+# ifdef WIN32
+/* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
+# if !defined(vsnprintf) && !defined(NO_vsnprintf)
+# if !defined(_MSC_VER) || ( defined(_MSC_VER) && _MSC_VER < 1500 )
+# include <io.h>
+# define vsnprintf _vsnprintf
+# endif
+# endif
+# endif
+# ifdef __SASC
+# define NO_vsnprintf
+# endif
+# ifdef VMS
+# define NO_vsnprintf
+# endif
+# ifdef __OS400__
+# define NO_vsnprintf
+# endif
+# ifdef __MVS__
+# define NO_vsnprintf
+# endif
#endif
#ifndef local
ZEXTERN z_off64_t ZEXPORT gzoffset64 OF((gzFile));
#endif
+/* default memLevel */
+#if MAX_MEM_LEVEL >= 8
+# define DEF_MEM_LEVEL 8
+#else
+# define DEF_MEM_LEVEL MAX_MEM_LEVEL
+#endif
+
/* default i/o buffer size -- double this for output when reading */
#define GZBUFSIZE 8192
/* internal gzip file state data structure */
typedef struct {
+ /* exposed contents for gzgetc() macro */
+ struct gzFile_s x; /* "x" for exposed */
+ /* x.have: number of bytes available at x.next */
+ /* x.next: next output data to deliver or write */
+ /* x.pos: current position in uncompressed data */
/* used for both reading and writing */
int mode; /* see gzip modes above */
int fd; /* file descriptor */
char *path; /* path or fd for error messages */
- z_off64_t pos; /* current position in uncompressed data */
unsigned size; /* buffer size, zero if not allocated yet */
unsigned want; /* requested buffer size, default is GZBUFSIZE */
unsigned char *in; /* input buffer */
unsigned char *out; /* output buffer (double-sized when reading) */
- unsigned char *next; /* next output data to deliver or write */
+ int direct; /* 0 if processing gzip, 1 if transparent */
/* just for reading */
- unsigned have; /* amount of output data unused at next */
- int eof; /* true if end of input file reached */
- z_off64_t start; /* where the gzip data started, for rewinding */
- z_off64_t raw; /* where the raw data started, for seeking */
int how; /* 0: get header, 1: copy, 2: decompress */
- int direct; /* true if last read direct, false if gzip */
+ z_off64_t start; /* where the gzip data started, for rewinding */
+ int eof; /* true if end of input file reached */
+ int past; /* true if read requested past end */
/* just for writing */
int level; /* compression level */
int strategy; /* compression strategy */
/* gzlib.c -- zlib functions common to reading and writing gzip files
- * Copyright (C) 2004, 2010 Mark Adler
+ * Copyright (C) 2004, 2010, 2011 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#include "gzguts.h"
+#if defined(_WIN32) && !defined(__BORLANDC__)
+# define LSEEK _lseeki64
+#else
#if defined(_LARGEFILE64_SOURCE) && _LFS64_LARGEFILE-0
# define LSEEK lseek64
#else
# define LSEEK lseek
#endif
+#endif
/* Local functions */
local void gz_reset OF((gz_statep));
local void gz_reset(state)
gz_statep state;
{
+ state->x.have = 0; /* no output data available */
if (state->mode == GZ_READ) { /* for reading ... */
- state->have = 0; /* no output data available */
state->eof = 0; /* not at end of file */
+ state->past = 0; /* have not read past end yet */
state->how = LOOK; /* look for gzip header */
- state->direct = 1; /* default for empty file */
}
state->seek = 0; /* no seek request pending */
gz_error(state, Z_OK, NULL); /* clear error */
- state->pos = 0; /* no uncompressed data yet */
+ state->x.pos = 0; /* no uncompressed data yet */
state->strm.avail_in = 0; /* no input data yet */
}
{
gz_statep state;
+ /* check input */
+ if (path == NULL)
+ return NULL;
+
/* allocate gzFile structure to return */
state = malloc(sizeof(gz_state));
if (state == NULL)
state->mode = GZ_NONE;
state->level = Z_DEFAULT_COMPRESSION;
state->strategy = Z_DEFAULT_STRATEGY;
+ state->direct = 0;
while (*mode) {
if (*mode >= '0' && *mode <= '9')
state->level = *mode - '0';
break;
case 'F':
state->strategy = Z_FIXED;
+ case 'T':
+ state->direct = 1;
default: /* could consider as an error, but just ignore */
;
}
return NULL;
}
+ /* can't force transparent read */
+ if (state->mode == GZ_READ) {
+ if (state->direct) {
+ free(state);
+ return NULL;
+ }
+ state->direct = 1; /* for empty file */
+ }
+
/* save the path name for error messages */
state->path = malloc(strlen(path) + 1);
if (state->path == NULL) {
return -1;
/* check and set requested size */
- if (size == 0)
- return -1;
+ if (size < 2)
+ size = 2; /* need two bytes to check magic header */
state->want = size;
return 0;
}
state = (gz_statep)file;
/* check that we're reading and that there's no error */
- if (state->mode != GZ_READ || state->err != Z_OK)
+ if (state->mode != GZ_READ ||
+ (state->err != Z_OK && state->err != Z_BUF_ERROR))
return -1;
/* back up and start over */
return -1;
/* check that there's no error */
- if (state->err != Z_OK)
+ if (state->err != Z_OK && state->err != Z_BUF_ERROR)
return -1;
/* can only seek from start or relative to current position */
/* normalize offset to a SEEK_CUR specification */
if (whence == SEEK_SET)
- offset -= state->pos;
+ offset -= state->x.pos;
else if (state->seek)
offset += state->skip;
state->seek = 0;
/* if within raw area while reading, just go there */
if (state->mode == GZ_READ && state->how == COPY &&
- state->pos + offset >= state->raw) {
- ret = LSEEK(state->fd, offset - state->have, SEEK_CUR);
+ state->x.pos + offset >= 0) {
+ ret = LSEEK(state->fd, offset - state->x.have, SEEK_CUR);
if (ret == -1)
return -1;
- state->have = 0;
+ state->x.have = 0;
state->eof = 0;
+ state->past = 0;
state->seek = 0;
gz_error(state, Z_OK, NULL);
state->strm.avail_in = 0;
- state->pos += offset;
- return state->pos;
+ state->x.pos += offset;
+ return state->x.pos;
}
/* calculate skip amount, rewinding if needed for back seek when reading */
if (offset < 0) {
if (state->mode != GZ_READ) /* writing -- can't go backwards */
return -1;
- offset += state->pos;
+ offset += state->x.pos;
if (offset < 0) /* before start of file! */
return -1;
if (gzrewind(file) == -1) /* rewind, then skip to offset */
/* if reading, skip what's in output buffer (one less gzgetc() check) */
if (state->mode == GZ_READ) {
- n = GT_OFF(state->have) || (z_off64_t)state->have > offset ?
- (unsigned)offset : state->have;
- state->have -= n;
- state->next += n;
- state->pos += n;
+ n = GT_OFF(state->x.have) || (z_off64_t)state->x.have > offset ?
+ (unsigned)offset : state->x.have;
+ state->x.have -= n;
+ state->x.next += n;
+ state->x.pos += n;
offset -= n;
}
state->seek = 1;
state->skip = offset;
}
- return state->pos + offset;
+ return state->x.pos + offset;
}
/* -- see zlib.h -- */
return -1;
/* return position */
- return state->pos + (state->seek ? state->skip : 0);
+ return state->x.pos + (state->seek ? state->skip : 0);
}
/* -- see zlib.h -- */
return 0;
/* return end-of-file state */
- return state->mode == GZ_READ ?
- (state->eof && state->strm.avail_in == 0 && state->have == 0) : 0;
+ return state->mode == GZ_READ ? state->past : 0;
}
/* -- see zlib.h -- */
return;
/* clear error and end-of-file */
- if (state->mode == GZ_READ)
+ if (state->mode == GZ_READ) {
state->eof = 0;
+ state->past = 0;
+ }
gz_error(state, Z_OK, NULL);
}
state->msg = NULL;
}
+ /* if fatal, set state->x.have to 0 so that the gzgetc() macro fails */
+ if (err != Z_OK && err != Z_BUF_ERROR)
+ state->x.have = 0;
+
/* set error code, and if no message, then done */
state->err = err;
if (msg == NULL)
/* gzread.c -- zlib functions for reading gzip files
- * Copyright (C) 2004, 2005, 2010 Mark Adler
+ * Copyright (C) 2004, 2005, 2010, 2011 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
/* Local functions */
local int gz_load OF((gz_statep, unsigned char *, unsigned, unsigned *));
local int gz_avail OF((gz_statep));
-local int gz_next4 OF((gz_statep, unsigned long *));
-local int gz_head OF((gz_statep));
+local int gz_look OF((gz_statep));
local int gz_decomp OF((gz_statep));
-local int gz_make OF((gz_statep));
+local int gz_fetch OF((gz_statep));
local int gz_skip OF((gz_statep, z_off64_t));
/* Use read() to load a buffer -- return -1 on error, otherwise 0. Read from
error, 0 otherwise. Note that the eof flag is set when the end of the input
file is reached, even though there may be unused data in the buffer. Once
that data has been used, no more attempts will be made to read the file.
- gz_avail() assumes that strm->avail_in == 0. */
+ If strm->avail_in != 0, then the current data is moved to the beginning of
+ the input buffer, and then the remainder of the buffer is loaded with the
+ available data from the input file. */
local int gz_avail(state)
gz_statep state;
{
+ unsigned got;
z_streamp strm = &(state->strm);
- if (state->err != Z_OK)
+ if (state->err != Z_OK && state->err != Z_BUF_ERROR)
return -1;
if (state->eof == 0) {
- if (gz_load(state, state->in, state->size,
- (unsigned *)&(strm->avail_in)) == -1)
+ if (strm->avail_in)
+ memmove(state->in, strm->next_in, strm->avail_in);
+ if (gz_load(state, state->in + strm->avail_in,
+ state->size - strm->avail_in, &got) == -1)
return -1;
+ strm->avail_in += got;
strm->next_in = state->in;
}
return 0;
}
-/* Get next byte from input, or -1 if end or error. */
-#define NEXT() ((strm->avail_in == 0 && gz_avail(state) == -1) ? -1 : \
- (strm->avail_in == 0 ? -1 : \
- (strm->avail_in--, *(strm->next_in)++)))
-
-/* Get a four-byte little-endian integer and return 0 on success and the value
- in *ret. Otherwise -1 is returned and *ret is not modified. */
-local int gz_next4(state, ret)
- gz_statep state;
- unsigned long *ret;
-{
- int ch;
- unsigned long val;
- z_streamp strm = &(state->strm);
-
- val = NEXT();
- val += (unsigned)NEXT() << 8;
- val += (unsigned long)NEXT() << 16;
- ch = NEXT();
- if (ch == -1)
- return -1;
- val += (unsigned long)ch << 24;
- *ret = val;
- return 0;
-}
-
-/* Look for gzip header, set up for inflate or copy. state->have must be zero.
+/* Look for gzip header, set up for inflate or copy. state->x.have must be 0.
If this is the first time in, allocate required memory. state->how will be
left unchanged if there is no more input data available, will be set to COPY
if there is no gzip header and direct copying will be performed, or it will
- be set to GZIP for decompression, and the gzip header will be skipped so
- that the next available input data is the raw deflate stream. If direct
- copying, then leftover input data from the input buffer will be copied to
- the output buffer. In that case, all further file reads will be directly to
- either the output buffer or a user buffer. If decompressing, the inflate
- state and the check value will be initialized. gz_head() will return 0 on
- success or -1 on failure. Failures may include read errors or gzip header
- errors. */
-local int gz_head(state)
+ be set to GZIP for decompression. If direct copying, then leftover input
+ data from the input buffer will be copied to the output buffer. In that
+ case, all further file reads will be directly to either the output buffer or
+ a user buffer. If decompressing, the inflate state will be initialized.
+ gz_look() will return 0 on success or -1 on failure. */
+local int gz_look(state)
gz_statep state;
{
z_streamp strm = &(state->strm);
- int flags;
- unsigned len;
/* allocate read buffers and inflate memory */
if (state->size == 0) {
state->strm.opaque = Z_NULL;
state->strm.avail_in = 0;
state->strm.next_in = Z_NULL;
- if (inflateInit2(&(state->strm), -15) != Z_OK) { /* raw inflate */
+ if (inflateInit2(&(state->strm), 15 + 16) != Z_OK) { /* gunzip */
free(state->out);
free(state->in);
state->size = 0;
}
}
- /* get some data in the input buffer */
- if (strm->avail_in == 0) {
+ /* get at least the magic bytes in the input buffer */
+ if (strm->avail_in < 2) {
if (gz_avail(state) == -1)
return -1;
if (strm->avail_in == 0)
return 0;
}
- /* look for the gzip magic header bytes 31 and 139 */
- if (strm->next_in[0] == 31) {
- strm->avail_in--;
- strm->next_in++;
- if (strm->avail_in == 0 && gz_avail(state) == -1)
- return -1;
- if (strm->avail_in && strm->next_in[0] == 139) {
- /* we have a gzip header, woo hoo! */
- strm->avail_in--;
- strm->next_in++;
-
- /* skip rest of header */
- if (NEXT() != 8) { /* compression method */
- gz_error(state, Z_DATA_ERROR, "unknown compression method");
- return -1;
- }
- flags = NEXT();
- if (flags & 0xe0) { /* reserved flag bits */
- gz_error(state, Z_DATA_ERROR, "unknown header flags set");
- return -1;
- }
- NEXT(); /* modification time */
- NEXT();
- NEXT();
- NEXT();
- NEXT(); /* extra flags */
- NEXT(); /* operating system */
- if (flags & 4) { /* extra field */
- len = (unsigned)NEXT();
- len += (unsigned)NEXT() << 8;
- while (len--)
- if (NEXT() < 0)
- break;
- }
- if (flags & 8) /* file name */
- while (NEXT() > 0)
- ;
- if (flags & 16) /* comment */
- while (NEXT() > 0)
- ;
- if (flags & 2) { /* header crc */
- NEXT();
- NEXT();
- }
- /* an unexpected end of file is not checked for here -- it will be
- noticed on the first request for uncompressed data */
-
- /* set up for decompression */
- inflateReset(strm);
- strm->adler = crc32(0L, Z_NULL, 0);
- state->how = GZIP;
- state->direct = 0;
- return 0;
- }
- else {
- /* not a gzip file -- save first byte (31) and fall to raw i/o */
- state->out[0] = 31;
- state->have = 1;
- }
+ /* look for gzip magic bytes -- if there, do gzip decoding (note: there is
+ a logical dilemma here when considering the case of a partially written
+ gzip file, to wit, if a single 31 byte is written, then we cannot tell
+ whether this is a single-byte file, or just a partially written gzip
+ file -- for here we assume that if a gzip file is being written, then
+ the header will be written in a single operation, so that reading a
+ single byte is sufficient indication that it is not a gzip file) */
+ if (strm->avail_in > 1 &&
+ strm->next_in[0] == 31 && strm->next_in[1] == 139) {
+ inflateReset(strm);
+ state->how = GZIP;
+ state->direct = 0;
+ return 0;
+ }
+
+ /* no gzip header -- if we were decoding gzip before, then this is trailing
+ garbage. Ignore the trailing garbage and finish. */
+ if (state->direct == 0) {
+ strm->avail_in = 0;
+ state->eof = 1;
+ state->x.have = 0;
+ return 0;
}
- /* doing raw i/o, save start of raw data for seeking, copy any leftover
- input to output -- this assumes that the output buffer is larger than
- the input buffer, which also assures space for gzungetc() */
- state->raw = state->pos;
- state->next = state->out;
+ /* doing raw i/o, copy any leftover input to output -- this assumes that
+ the output buffer is larger than the input buffer, which also assures
+ space for gzungetc() */
+ state->x.next = state->out;
if (strm->avail_in) {
- memcpy(state->next + state->have, strm->next_in, strm->avail_in);
- state->have += strm->avail_in;
+ memcpy(state->x.next, strm->next_in, strm->avail_in);
+ state->x.have = strm->avail_in;
strm->avail_in = 0;
}
state->how = COPY;
}
/* Decompress from input to the provided next_out and avail_out in the state.
- If the end of the compressed data is reached, then verify the gzip trailer
- check value and length (modulo 2^32). state->have and state->next are set
- to point to the just decompressed data, and the crc is updated. If the
- trailer is verified, state->how is reset to LOOK to look for the next gzip
- stream or raw data, once state->have is depleted. Returns 0 on success, -1
- on failure. Failures may include invalid compressed data or a failed gzip
- trailer verification. */
+ On return, state->x.have and state->x.next point to the just decompressed
+ data. If the gzip stream completes, state->how is reset to LOOK to look for
+ the next gzip stream or raw data, once state->x.have is depleted. Returns 0
+ on success, -1 on failure. */
local int gz_decomp(state)
gz_statep state;
{
- int ret;
+ int ret = Z_OK;
unsigned had;
- unsigned long crc, len;
z_streamp strm = &(state->strm);
/* fill output buffer up to end of deflate stream */
if (strm->avail_in == 0 && gz_avail(state) == -1)
return -1;
if (strm->avail_in == 0) {
-#if 0
- gz_error(state, Z_DATA_ERROR, "unexpected end of file");
- return -1;
-#else
- /* APITRACE: Ignore unexpected end of file. */
- ret = 0;
+ gz_error(state, Z_BUF_ERROR, "unexpected end of file");
break;
-#endif
}
/* decompress and handle errors */
ret = inflate(strm, Z_NO_FLUSH);
if (ret == Z_STREAM_ERROR || ret == Z_NEED_DICT) {
gz_error(state, Z_STREAM_ERROR,
- "internal error: inflate stream corrupt");
+ "internal error: inflate stream corrupt");
return -1;
}
if (ret == Z_MEM_ERROR) {
}
if (ret == Z_DATA_ERROR) { /* deflate stream invalid */
gz_error(state, Z_DATA_ERROR,
- strm->msg == NULL ? "compressed data error" : strm->msg);
+ strm->msg == NULL ? "compressed data error" : strm->msg);
return -1;
}
} while (strm->avail_out && ret != Z_STREAM_END);
- /* update available output and crc check value */
- state->have = had - strm->avail_out;
- state->next = strm->next_out - state->have;
- strm->adler = crc32(strm->adler, state->next, state->have);
+ /* update available output */
+ state->x.have = had - strm->avail_out;
+ state->x.next = strm->next_out - state->x.have;
- /* check gzip trailer if at end of deflate stream */
- if (ret == Z_STREAM_END) {
- if (gz_next4(state, &crc) == -1 || gz_next4(state, &len) == -1) {
- gz_error(state, Z_DATA_ERROR, "unexpected end of file");
- return -1;
- }
- if (crc != strm->adler) {
- gz_error(state, Z_DATA_ERROR, "incorrect data check");
- return -1;
- }
- if (len != (strm->total_out & 0xffffffffL)) {
- gz_error(state, Z_DATA_ERROR, "incorrect length check");
- return -1;
- }
- state->how = LOOK; /* ready for next stream, once have is 0 (leave
- state->direct unchanged to remember how) */
- }
+ /* if the gzip stream completed successfully, look for another */
+ if (ret == Z_STREAM_END)
+ state->how = LOOK;
/* good decompression */
return 0;
}
-/* Make data and put in the output buffer. Assumes that state->have == 0.
+/* Fetch data and put it in the output buffer. Assumes state->x.have is 0.
Data is either copied from the input file or decompressed from the input
file depending on state->how. If state->how is LOOK, then a gzip header is
- looked for (and skipped if found) to determine wither to copy or decompress.
- Returns -1 on error, otherwise 0. gz_make() will leave state->have as COPY
- or GZIP unless the end of the input file has been reached and all data has
- been processed. */
-local int gz_make(state)
+ looked for to determine whether to copy or decompress. Returns -1 on error,
+ otherwise 0. gz_fetch() will leave state->how as COPY or GZIP unless the
+ end of the input file has been reached and all data has been processed. */
+local int gz_fetch(state)
gz_statep state;
{
z_streamp strm = &(state->strm);
- if (state->how == LOOK) { /* look for gzip header */
- if (gz_head(state) == -1)
- return -1;
- if (state->have) /* got some data from gz_head() */
+ do {
+ switch(state->how) {
+ case LOOK: /* -> LOOK, COPY (only if never GZIP), or GZIP */
+ if (gz_look(state) == -1)
+ return -1;
+ if (state->how == LOOK)
+ return 0;
+ break;
+ case COPY: /* -> COPY */
+ if (gz_load(state, state->out, state->size << 1, &(state->x.have))
+ == -1)
+ return -1;
+ state->x.next = state->out;
return 0;
- }
- if (state->how == COPY) { /* straight copy */
- if (gz_load(state, state->out, state->size << 1, &(state->have)) == -1)
- return -1;
- state->next = state->out;
- }
- else if (state->how == GZIP) { /* decompress */
- strm->avail_out = state->size << 1;
- strm->next_out = state->out;
- if (gz_decomp(state) == -1)
- return -1;
- }
+ case GZIP: /* -> GZIP or LOOK (if end of gzip stream) */
+ strm->avail_out = state->size << 1;
+ strm->next_out = state->out;
+ if (gz_decomp(state) == -1)
+ return -1;
+ }
+ } while (state->x.have == 0 && (!state->eof || strm->avail_in));
return 0;
}
/* skip over len bytes or reach end-of-file, whichever comes first */
while (len)
/* skip over whatever is in output buffer */
- if (state->have) {
- n = GT_OFF(state->have) || (z_off64_t)state->have > len ?
- (unsigned)len : state->have;
- state->have -= n;
- state->next += n;
- state->pos += n;
+ if (state->x.have) {
+ n = GT_OFF(state->x.have) || (z_off64_t)state->x.have > len ?
+ (unsigned)len : state->x.have;
+ state->x.have -= n;
+ state->x.next += n;
+ state->x.pos += n;
len -= n;
}
/* need more data to skip -- load up output buffer */
else {
/* get more output, looking for header if required */
- if (gz_make(state) == -1)
+ if (gz_fetch(state) == -1)
return -1;
}
return 0;
state = (gz_statep)file;
strm = &(state->strm);
- /* check that we're reading and that there's no error */
- if (state->mode != GZ_READ || state->err != Z_OK)
+ /* 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_BUF_ERROR, "requested length does not fit in int");
+ gz_error(state, Z_DATA_ERROR, "requested length does not fit in int");
return -1;
}
got = 0;
do {
/* first just try copying data from the output buffer */
- if (state->have) {
- n = state->have > len ? len : state->have;
- memcpy(buf, state->next, n);
- state->next += n;
- state->have -= n;
+ if (state->x.have) {
+ n = state->x.have > len ? len : 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 && 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)) {
/* get more output, looking for header if required */
- if (gz_make(state) == -1)
+ if (gz_fetch(state) == -1)
return -1;
continue; /* no progress yet -- go back to memcpy() above */
/* the copy above assures that we will leave with space in the
strm->next_out = buf;
if (gz_decomp(state) == -1)
return -1;
- n = state->have;
- state->have = 0;
+ n = state->x.have;
+ state->x.have = 0;
}
/* update progress */
len -= n;
buf = (char *)buf + n;
got += n;
- state->pos += n;
+ state->x.pos += n;
} while (len);
/* return number of bytes read into user buffer (will fit in int) */
}
/* -- see zlib.h -- */
-int ZEXPORT gzgetc(file)
+int ZEXPORT gzgetc_(file)
gzFile file;
{
int ret;
return -1;
state = (gz_statep)file;
- /* check that we're reading and that there's no error */
- if (state->mode != GZ_READ || state->err != Z_OK)
+ /* 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;
/* try output buffer (no need to check for skip request) */
- if (state->have) {
- state->have--;
- state->pos++;
- return *(state->next)++;
+ if (state->x.have) {
+ state->x.have--;
+ state->x.pos++;
+ return *(state->x.next)++;
}
/* nothing there -- try gzread() */
return ret < 1 ? -1 : buf[0];
}
+#undef gzgetc
+int ZEXPORT gzgetc(file)
+gzFile file;
+{
+ return gzgetc_(file);
+}
+
/* -- see zlib.h -- */
int ZEXPORT gzungetc(c, file)
int c;
return -1;
state = (gz_statep)file;
- /* check that we're reading and that there's no error */
- if (state->mode != GZ_READ || state->err != Z_OK)
+ /* 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;
/* process a skip request */
return -1;
/* if output buffer empty, put byte at end (allows more pushing) */
- if (state->have == 0) {
- state->have = 1;
- state->next = state->out + (state->size << 1) - 1;
- state->next[0] = c;
- state->pos--;
+ 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.pos--;
+ state->past = 0;
return c;
}
/* if no room, give up (must have already done a gzungetc()) */
- if (state->have == (state->size << 1)) {
- gz_error(state, Z_BUF_ERROR, "out of room to push characters");
+ if (state->x.have == (state->size << 1)) {
+ gz_error(state, Z_DATA_ERROR, "out of room to push characters");
return -1;
}
/* slide output data if needed and insert byte before existing data */
- if (state->next == state->out) {
- unsigned char *src = state->out + state->have;
+ if (state->x.next == state->out) {
+ unsigned char *src = state->out + state->x.have;
unsigned char *dest = state->out + (state->size << 1);
while (src > state->out)
*--dest = *--src;
- state->next = dest;
+ state->x.next = dest;
}
- state->have++;
- state->next--;
- state->next[0] = c;
- state->pos--;
+ state->x.have++;
+ state->x.next--;
+ state->x.next[0] = c;
+ state->x.pos--;
+ state->past = 0;
return c;
}
return NULL;
state = (gz_statep)file;
- /* check that we're reading and that there's no error */
- if (state->mode != GZ_READ || state->err != Z_OK)
+ /* 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 NULL;
/* process a skip request */
left = (unsigned)len - 1;
if (left) do {
/* assure that something is in the output buffer */
- if (state->have == 0) {
- if (gz_make(state) == -1)
- return NULL; /* error */
- if (state->have == 0) { /* end of file */
- if (buf == str) /* got bupkus */
- return NULL;
- break; /* got something -- return it */
- }
+ if (state->x.have == 0 && gz_fetch(state) == -1)
+ return NULL; /* error */
+ if (state->x.have == 0) { /* end of file */
+ state->past = 1; /* read past end */
+ break; /* return what we have */
}
/* look for end-of-line in current output buffer */
- n = state->have > left ? left : state->have;
- eol = memchr(state->next, '\n', n);
+ n = state->x.have > left ? left : state->x.have;
+ eol = memchr(state->x.next, '\n', n);
if (eol != NULL)
- n = (unsigned)(eol - state->next) + 1;
+ n = (unsigned)(eol - state->x.next) + 1;
/* copy through end-of-line, or remainder if not found */
- memcpy(buf, state->next, n);
- state->have -= n;
- state->next += n;
- state->pos += n;
+ memcpy(buf, state->x.next, n);
+ state->x.have -= n;
+ state->x.next += n;
+ state->x.pos += n;
left -= n;
buf += n;
} while (left && eol == NULL);
- /* found end-of-line or out of space -- terminate string and return it */
+ /* return terminated string, or if nothing, end of file */
+ if (buf == str)
+ return NULL;
buf[0] = 0;
return str;
}
return 0;
state = (gz_statep)file;
- /* check that we're reading */
- if (state->mode != GZ_READ)
- return 0;
-
/* if the state is not known, but we can find out, then do so (this is
mainly for right after a gzopen() or gzdopen()) */
- if (state->how == LOOK && state->have == 0)
- (void)gz_head(state);
+ if (state->mode == GZ_READ && state->how == LOOK && state->x.have == 0)
+ (void)gz_look(state);
- /* return 1 if reading direct, 0 if decompressing a gzip stream */
+ /* return 1 if transparent, 0 if processing a gzip stream */
return state->direct;
}
int ZEXPORT gzclose_r(file)
gzFile file;
{
- int ret;
+ int ret, err;
gz_statep state;
/* get internal structure */
free(state->out);
free(state->in);
}
+ err = state->err == Z_BUF_ERROR ? Z_BUF_ERROR : Z_OK;
gz_error(state, Z_OK, NULL);
free(state->path);
ret = close(state->fd);
free(state);
- return ret ? Z_ERRNO : Z_OK;
+ return ret ? Z_ERRNO : err;
}
/* gzwrite.c -- zlib functions for writing gzip files
- * Copyright (C) 2004, 2005, 2010 Mark Adler
+ * Copyright (C) 2004, 2005, 2010, 2011, 2012 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
int ret;
z_streamp strm = &(state->strm);
- /* allocate input and output buffers */
+ /* allocate input buffer */
state->in = malloc(state->want);
- state->out = malloc(state->want);
- if (state->in == NULL || state->out == NULL) {
- if (state->out != NULL)
- free(state->out);
- if (state->in != NULL)
- free(state->in);
+ if (state->in == NULL) {
gz_error(state, Z_MEM_ERROR, "out of memory");
return -1;
}
- /* allocate deflate memory, set up for gzip compression */
- strm->zalloc = Z_NULL;
- strm->zfree = Z_NULL;
- strm->opaque = Z_NULL;
- ret = deflateInit2(strm, state->level, Z_DEFLATED,
- 15 + 16, 8, state->strategy);
- if (ret != Z_OK) {
- free(state->in);
- gz_error(state, Z_MEM_ERROR, "out of memory");
- return -1;
+ /* only need output buffer and deflate state if compressing */
+ if (!state->direct) {
+ /* allocate output buffer */
+ state->out = malloc(state->want);
+ if (state->out == NULL) {
+ free(state->in);
+ gz_error(state, Z_MEM_ERROR, "out of memory");
+ return -1;
+ }
+
+ /* allocate deflate memory, set up for gzip compression */
+ strm->zalloc = Z_NULL;
+ strm->zfree = Z_NULL;
+ strm->opaque = Z_NULL;
+ ret = deflateInit2(strm, state->level, Z_DEFLATED,
+ MAX_WBITS + 16, DEF_MEM_LEVEL, state->strategy);
+ if (ret != Z_OK) {
+ free(state->out);
+ free(state->in);
+ gz_error(state, Z_MEM_ERROR, "out of memory");
+ return -1;
+ }
}
/* mark state as initialized */
state->size = state->want;
- /* initialize write buffer */
- strm->avail_out = state->size;
- strm->next_out = state->out;
- state->next = strm->next_out;
+ /* initialize write buffer if compressing */
+ if (!state->direct) {
+ strm->avail_out = state->size;
+ strm->next_out = state->out;
+ state->x.next = strm->next_out;
+ }
return 0;
}
/* 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. */
+ 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;
if (state->size == 0 && gz_init(state) == -1)
return -1;
+ /* 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;
+ }
+ strm->avail_in = 0;
+ return 0;
+ }
+
/* run deflate() on provided input until it produces no more output */
ret = Z_OK;
do {
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->next);
- if (have && ((got = write(state->fd, state->next, have)) < 0 ||
+ 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;
strm->avail_out = state->size;
strm->next_out = state->out;
}
- state->next = strm->next_out;
+ state->x.next = strm->next_out;
}
/* compress */
}
strm->avail_in = n;
strm->next_in = state->in;
- state->pos += n;
+ state->x.pos += n;
if (gz_comp(state, Z_NO_FLUSH) == -1)
return -1;
len -= n;
/* 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_BUF_ERROR, "requested length does not fit in int");
+ gz_error(state, Z_DATA_ERROR, "requested length does not fit in int");
return 0;
}
n = len;
memcpy(strm->next_in + strm->avail_in, buf, n);
strm->avail_in += n;
- state->pos += n;
+ state->x.pos += n;
buf = (char *)buf + n;
len -= n;
if (len && gz_comp(state, Z_NO_FLUSH) == -1)
/* directly compress user buffer to file */
strm->avail_in = len;
strm->next_in = (voidp)buf;
- state->pos += len;
+ state->x.pos += len;
if (gz_comp(state, Z_NO_FLUSH) == -1)
return 0;
}
if (strm->avail_in == 0)
strm->next_in = state->in;
strm->next_in[strm->avail_in++] = c;
- state->pos++;
- return c;
+ state->x.pos++;
+ return c & 0xff;
}
/* no room in buffer or not initialized, use gz_write() */
buf[0] = c;
if (gzwrite(file, buf, 1) != 1)
return -1;
- return c;
+ return c & 0xff;
}
/* -- see zlib.h -- */
return ret == 0 && len != 0 ? -1 : ret;
}
-#ifdef STDC
+#if defined(STDC) || defined(Z_HAVE_STDARG_H)
#include <stdarg.h>
/* -- see zlib.h -- */
/* update buffer and position, defer compression until needed */
strm->avail_in = (unsigned)len;
strm->next_in = state->in;
- state->pos += len;
+ state->x.pos += len;
return len;
}
-#else /* !STDC */
+#else /* !STDC && !Z_HAVE_STDARG_H */
/* -- see zlib.h -- */
int ZEXPORTVA gzprintf (file, format, a1, a2, a3, a4, a5, a6, a7, a8, a9, a10,
state = (gz_statep)file;
strm = &(state->strm);
+ /* check that can really pass pointer in ints */
+ if (sizeof(int) != sizeof(void *))
+ return 0;
+
/* check that we're writing and that there's no error */
if (state->mode != GZ_WRITE || state->err != Z_OK)
return 0;
/* update buffer and position, defer compression until needed */
strm->avail_in = (unsigned)len;
strm->next_in = state->in;
- state->pos += len;
+ state->x.pos += len;
return len;
}
int ZEXPORT gzclose_w(file)
gzFile file;
{
- int ret = 0;
+ int ret = Z_OK;
gz_statep state;
/* get internal structure */
/* check for seek request */
if (state->seek) {
state->seek = 0;
- ret += gz_zero(state, state->skip);
+ if (gz_zero(state, state->skip) == -1)
+ ret = state->err;
}
/* flush, free memory, and close file */
- ret += gz_comp(state, Z_FINISH);
- (void)deflateEnd(&(state->strm));
- free(state->out);
+ if (gz_comp(state, Z_FINISH) == -1)
+ ret = state->err;
+ if (!state->direct) {
+ (void)deflateEnd(&(state->strm));
+ free(state->out);
+ }
free(state->in);
gz_error(state, Z_OK, NULL);
free(state->path);
- ret += close(state->fd);
+ if (close(state->fd) == -1)
+ ret = Z_ERRNO;
free(state);
- return ret ? Z_ERRNO : Z_OK;
+ return ret;
+}
+
+/* used by zlibVersion() to get the vsnprintf story from the horse's mouth */
+unsigned long ZEXPORT gzflags()
+{
+ unsigned long flags = 0;
+#if defined(STDC) || defined(Z_HAVE_STDARG_H)
+# ifdef NO_vsnprintf
+ flags += 1L << 25;
+# ifdef HAS_vsprintf_void
+ flags += 1L << 26;
+# endif
+# else
+# ifdef HAS_vsnprintf_void
+ flags += 1L << 26;
+# endif
+# endif
+#else
+ flags += 1L << 24;
+# ifdef NO_snprintf
+ flags += 1L << 25;
+# ifdef HAS_sprintf_void
+ flags += 1L << 26;
+# endif
+# else
+# ifdef HAS_snprintf_void
+ flags += 1L << 26;
+# endif
+# endif
+#endif
+ return flags;
}
/* infback.c -- inflate using a call-back interface
- * Copyright (C) 1995-2009 Mark Adler
+ * Copyright (C) 1995-2011 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
return Z_STREAM_ERROR;
strm->msg = Z_NULL; /* in case we return an error */
if (strm->zalloc == (alloc_func)0) {
+#ifdef Z_SOLO
+ return Z_STREAM_ERROR;
+#else
strm->zalloc = zcalloc;
strm->opaque = (voidpf)0;
+#endif
}
- if (strm->zfree == (free_func)0) strm->zfree = zcfree;
+ if (strm->zfree == (free_func)0)
+#ifdef Z_SOLO
+ return Z_STREAM_ERROR;
+#else
+ strm->zfree = zcfree;
+#endif
state = (struct inflate_state FAR *)ZALLOC(strm, 1,
sizeof(struct inflate_state));
if (state == Z_NULL) return Z_MEM_ERROR;
PULLBYTE();
}
if (here.val < 16) {
- NEEDBITS(here.bits);
DROPBITS(here.bits);
state->lens[state->have++] = here.val;
}
* Generated automatically by makefixed().
*/
- /* WARNING: this file should *not* be used by applications. It
- is part of the implementation of the compression library and
- is subject to change. Applications should only use zlib.h.
+ /* WARNING: this file should *not* be used by applications.
+ It is part of the implementation of this library and is
+ subject to change. Applications should only use zlib.h.
*/
static const code lenfix[512] = {
/* inflate.c -- zlib decompression
- * Copyright (C) 1995-2010 Mark Adler
+ * Copyright (C) 1995-2011 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
local unsigned syncsearch OF((unsigned FAR *have, unsigned char FAR *buf,
unsigned len));
-int ZEXPORT inflateReset(strm)
+int ZEXPORT inflateResetKeep(strm)
z_streamp strm;
{
struct inflate_state FAR *state;
state = (struct inflate_state FAR *)strm->state;
strm->total_in = strm->total_out = state->total = 0;
strm->msg = Z_NULL;
- strm->adler = 1; /* to support ill-conceived Java test suite */
+ if (state->wrap) /* to support ill-conceived Java test suite */
+ strm->adler = state->wrap & 1;
state->mode = HEAD;
state->last = 0;
state->havedict = 0;
state->dmax = 32768U;
state->head = Z_NULL;
- state->wsize = 0;
- state->whave = 0;
- state->wnext = 0;
state->hold = 0;
state->bits = 0;
state->lencode = state->distcode = state->next = state->codes;
return Z_OK;
}
+int ZEXPORT inflateReset(strm)
+z_streamp strm;
+{
+ struct inflate_state FAR *state;
+
+ if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
+ state = (struct inflate_state FAR *)strm->state;
+ state->wsize = 0;
+ state->whave = 0;
+ state->wnext = 0;
+ return inflateResetKeep(strm);
+}
+
int ZEXPORT inflateReset2(strm, windowBits)
z_streamp strm;
int windowBits;
if (strm == Z_NULL) return Z_STREAM_ERROR;
strm->msg = Z_NULL; /* in case we return an error */
if (strm->zalloc == (alloc_func)0) {
+#ifdef Z_SOLO
+ return Z_STREAM_ERROR;
+#else
strm->zalloc = zcalloc;
strm->opaque = (voidpf)0;
+#endif
}
- if (strm->zfree == (free_func)0) strm->zfree = zcfree;
+ if (strm->zfree == (free_func)0)
+#ifdef Z_SOLO
+ return Z_STREAM_ERROR;
+#else
+ strm->zfree = zcfree;
+#endif
state = (struct inflate_state FAR *)
ZALLOC(strm, 1, sizeof(struct inflate_state));
if (state == Z_NULL) return Z_MEM_ERROR;
low = 0;
for (;;) {
if ((low % 7) == 0) printf("\n ");
- printf("{%u,%u,%d}", state.lencode[low].op, state.lencode[low].bits,
- state.lencode[low].val);
+ printf("{%u,%u,%d}", (low & 127) == 99 ? 64 : state.lencode[low].op,
+ state.lencode[low].bits, state.lencode[low].val);
if (++low == size) break;
putchar(',');
}
PULLBYTE();
}
if (here.val < 16) {
- NEEDBITS(here.bits);
DROPBITS(here.bits);
state->lens[state->have++] = here.val;
}
*/
inf_leave:
RESTORE();
- if (state->wsize || (state->mode < CHECK && out != strm->avail_out))
+ if (state->wsize || (out != strm->avail_out && state->mode < BAD &&
+ (state->mode < CHECK || flush != Z_FINISH)))
if (updatewindow(strm, out)) {
state->mode = MEM;
return Z_MEM_ERROR;
{
struct inflate_state FAR *state;
unsigned long id;
+ unsigned char *next;
+ unsigned avail;
+ int ret;
/* check state */
if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR;
return Z_DATA_ERROR;
}
- /* copy dictionary to window */
- if (updatewindow(strm, strm->avail_out)) {
+ /* copy dictionary to window using updatewindow(), which will amend the
+ existing dictionary if appropriate */
+ next = strm->next_out;
+ avail = strm->avail_out;
+ strm->next_out = (Bytef *)dictionary + dictLength;
+ strm->avail_out = 0;
+ ret = updatewindow(strm, dictLength);
+ strm->avail_out = avail;
+ strm->next_out = next;
+ if (ret) {
state->mode = MEM;
return Z_MEM_ERROR;
}
- if (dictLength > state->wsize) {
- zmemcpy(state->window, dictionary + dictLength - state->wsize,
- state->wsize);
- state->whave = state->wsize;
- }
- else {
- zmemcpy(state->window + state->wsize - dictLength, dictionary,
- dictLength);
- state->whave = dictLength;
- }
state->havedict = 1;
Tracev((stderr, "inflate: dictionary set\n"));
return Z_OK;
}
/* copy state */
- zmemcpy(dest, source, sizeof(z_stream));
- zmemcpy(copy, state, sizeof(struct inflate_state));
+ zmemcpy((voidpf)dest, (voidpf)source, sizeof(z_stream));
+ zmemcpy((voidpf)copy, (voidpf)state, sizeof(struct inflate_state));
if (state->lencode >= state->codes &&
state->lencode <= state->codes + ENOUGH - 1) {
copy->lencode = copy->codes + (state->lencode - state->codes);
/* inftrees.c -- generate Huffman trees for efficient decoding
- * Copyright (C) 1995-2010 Mark Adler
+ * Copyright (C) 1995-2012 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#define MAXBITS 15
const char inflate_copyright[] =
- " inflate 1.2.5 Copyright 1995-2010 Mark Adler ";
+ " inflate 1.2.6 Copyright 1995-2012 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
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, 73, 195};
+ 19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 203, 69};
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,
}
}
- /*
- Fill in rest of table for incomplete codes. This loop is similar to the
- loop above in incrementing huff for table indices. It is assumed that
- len is equal to curr + drop, so there is no loop needed to increment
- through high index bits. When the current sub-table is filled, the loop
- drops back to the root table to fill in any remaining entries there.
- */
- here.op = (unsigned char)64; /* invalid code marker */
- here.bits = (unsigned char)(len - drop);
- here.val = (unsigned short)0;
- while (huff != 0) {
- /* when done with sub-table, drop back to root table */
- if (drop != 0 && (huff & mask) != low) {
- drop = 0;
- len = root;
- next = *table;
- here.bits = (unsigned char)len;
- }
-
- /* put invalid code marker in table */
- next[huff >> drop] = here;
-
- /* backwards increment the len-bit code huff */
- incr = 1U << (len - 1);
- while (huff & incr)
- incr >>= 1;
- if (incr != 0) {
- huff &= incr - 1;
- huff += incr;
- }
- else
- huff = 0;
+ /* fill in remaining table entry if code is incomplete (guaranteed to have
+ at most one remaining entry, since if the code is incomplete, the
+ maximum code length that was allowed to get this far is one bit) */
+ if (huff != 0) {
+ here.op = (unsigned char)64; /* invalid code marker */
+ here.bits = (unsigned char)(len - drop);
+ here.val = (unsigned short)0;
+ next[huff] = here;
}
/* set return parameters */
+++ /dev/null
-/* minigzip.c -- simulate gzip using the zlib compression library
- * Copyright (C) 1995-2006, 2010 Jean-loup Gailly.
- * For conditions of distribution and use, see copyright notice in zlib.h
- */
-
-/*
- * minigzip is a minimal implementation of the gzip utility. This is
- * only an example of using zlib and isn't meant to replace the
- * full-featured gzip. No attempt is made to deal with file systems
- * limiting names to 14 or 8+3 characters, etc... Error checking is
- * very limited. So use minigzip only for testing; use gzip for the
- * real thing. On MSDOS, use only on file names without extension
- * or in pipe mode.
- */
-
-/* @(#) $Id$ */
-
-#include "zlib.h"
-#include <stdio.h>
-
-#ifdef STDC
-# include <string.h>
-# include <stdlib.h>
-#endif
-
-#ifdef USE_MMAP
-# include <sys/types.h>
-# include <sys/mman.h>
-# include <sys/stat.h>
-#endif
-
-#if defined(MSDOS) || defined(OS2) || defined(WIN32) || defined(__CYGWIN__)
-# include <fcntl.h>
-# include <io.h>
-# ifdef UNDER_CE
-# include <stdlib.h>
-# endif
-# define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY)
-#else
-# define SET_BINARY_MODE(file)
-#endif
-
-#ifdef VMS
-# define unlink delete
-# define GZ_SUFFIX "-gz"
-#endif
-#ifdef RISCOS
-# define unlink remove
-# define GZ_SUFFIX "-gz"
-# define fileno(file) file->__file
-#endif
-#if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
-# include <unix.h> /* for fileno */
-#endif
-
-#if !defined(Z_HAVE_UNISTD_H) && !defined(_LARGEFILE64_SOURCE)
-#ifndef WIN32 /* unlink already in stdio.h for WIN32 */
- extern int unlink OF((const char *));
-#endif
-#endif
-
-#if defined(UNDER_CE)
-# include <windows.h>
-# define perror(s) pwinerror(s)
-
-/* Map the Windows error number in ERROR to a locale-dependent error
- message string and return a pointer to it. Typically, the values
- for ERROR come from GetLastError.
-
- The string pointed to shall not be modified by the application,
- but may be overwritten by a subsequent call to strwinerror
-
- The strwinerror function does not change the current setting
- of GetLastError. */
-
-static char *strwinerror (error)
- DWORD error;
-{
- static char buf[1024];
-
- wchar_t *msgbuf;
- DWORD lasterr = GetLastError();
- DWORD chars = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM
- | FORMAT_MESSAGE_ALLOCATE_BUFFER,
- NULL,
- error,
- 0, /* Default language */
- (LPVOID)&msgbuf,
- 0,
- NULL);
- if (chars != 0) {
- /* If there is an \r\n appended, zap it. */
- if (chars >= 2
- && msgbuf[chars - 2] == '\r' && msgbuf[chars - 1] == '\n') {
- chars -= 2;
- msgbuf[chars] = 0;
- }
-
- if (chars > sizeof (buf) - 1) {
- chars = sizeof (buf) - 1;
- msgbuf[chars] = 0;
- }
-
- wcstombs(buf, msgbuf, chars + 1);
- LocalFree(msgbuf);
- }
- else {
- sprintf(buf, "unknown win32 error (%ld)", error);
- }
-
- SetLastError(lasterr);
- return buf;
-}
-
-static void pwinerror (s)
- const char *s;
-{
- if (s && *s)
- fprintf(stderr, "%s: %s\n", s, strwinerror(GetLastError ()));
- else
- fprintf(stderr, "%s\n", strwinerror(GetLastError ()));
-}
-
-#endif /* UNDER_CE */
-
-#ifndef GZ_SUFFIX
-# define GZ_SUFFIX ".gz"
-#endif
-#define SUFFIX_LEN (sizeof(GZ_SUFFIX)-1)
-
-#define BUFLEN 16384
-#define MAX_NAME_LEN 1024
-
-#ifdef MAXSEG_64K
-# define local static
- /* Needed for systems with limitation on stack size. */
-#else
-# define local
-#endif
-
-char *prog;
-
-void error OF((const char *msg));
-void gz_compress OF((FILE *in, gzFile out));
-#ifdef USE_MMAP
-int gz_compress_mmap OF((FILE *in, gzFile out));
-#endif
-void gz_uncompress OF((gzFile in, FILE *out));
-void file_compress OF((char *file, char *mode));
-void file_uncompress OF((char *file));
-int main OF((int argc, char *argv[]));
-
-/* ===========================================================================
- * Display error message and exit
- */
-void error(msg)
- const char *msg;
-{
- fprintf(stderr, "%s: %s\n", prog, msg);
- exit(1);
-}
-
-/* ===========================================================================
- * Compress input to output then close both files.
- */
-
-void gz_compress(in, out)
- FILE *in;
- gzFile out;
-{
- local char buf[BUFLEN];
- int len;
- int err;
-
-#ifdef USE_MMAP
- /* Try first compressing with mmap. If mmap fails (minigzip used in a
- * pipe), use the normal fread loop.
- */
- if (gz_compress_mmap(in, out) == Z_OK) return;
-#endif
- for (;;) {
- len = (int)fread(buf, 1, sizeof(buf), in);
- if (ferror(in)) {
- perror("fread");
- exit(1);
- }
- if (len == 0) break;
-
- if (gzwrite(out, buf, (unsigned)len) != len) error(gzerror(out, &err));
- }
- fclose(in);
- if (gzclose(out) != Z_OK) error("failed gzclose");
-}
-
-#ifdef USE_MMAP /* MMAP version, Miguel Albrecht <malbrech@eso.org> */
-
-/* Try compressing the input file at once using mmap. Return Z_OK if
- * if success, Z_ERRNO otherwise.
- */
-int gz_compress_mmap(in, out)
- FILE *in;
- gzFile out;
-{
- int len;
- int err;
- int ifd = fileno(in);
- caddr_t buf; /* mmap'ed buffer for the entire input file */
- off_t buf_len; /* length of the input file */
- struct stat sb;
-
- /* Determine the size of the file, needed for mmap: */
- if (fstat(ifd, &sb) < 0) return Z_ERRNO;
- buf_len = sb.st_size;
- if (buf_len <= 0) return Z_ERRNO;
-
- /* Now do the actual mmap: */
- buf = mmap((caddr_t) 0, buf_len, PROT_READ, MAP_SHARED, ifd, (off_t)0);
- if (buf == (caddr_t)(-1)) return Z_ERRNO;
-
- /* Compress the whole file at once: */
- len = gzwrite(out, (char *)buf, (unsigned)buf_len);
-
- if (len != (int)buf_len) error(gzerror(out, &err));
-
- munmap(buf, buf_len);
- fclose(in);
- if (gzclose(out) != Z_OK) error("failed gzclose");
- return Z_OK;
-}
-#endif /* USE_MMAP */
-
-/* ===========================================================================
- * Uncompress input to output then close both files.
- */
-void gz_uncompress(in, out)
- gzFile in;
- FILE *out;
-{
- local char buf[BUFLEN];
- int len;
- int err;
-
- for (;;) {
- len = gzread(in, buf, sizeof(buf));
- if (len < 0) error (gzerror(in, &err));
- if (len == 0) break;
-
- if ((int)fwrite(buf, 1, (unsigned)len, out) != len) {
- error("failed fwrite");
- }
- }
- if (fclose(out)) error("failed fclose");
-
- if (gzclose(in) != Z_OK) error("failed gzclose");
-}
-
-
-/* ===========================================================================
- * Compress the given file: create a corresponding .gz file and remove the
- * original.
- */
-void file_compress(file, mode)
- char *file;
- char *mode;
-{
- local char outfile[MAX_NAME_LEN];
- FILE *in;
- gzFile out;
-
- if (strlen(file) + strlen(GZ_SUFFIX) >= sizeof(outfile)) {
- fprintf(stderr, "%s: filename too long\n", prog);
- exit(1);
- }
-
- strcpy(outfile, file);
- strcat(outfile, GZ_SUFFIX);
-
- in = fopen(file, "rb");
- if (in == NULL) {
- perror(file);
- exit(1);
- }
- out = gzopen(outfile, mode);
- if (out == NULL) {
- fprintf(stderr, "%s: can't gzopen %s\n", prog, outfile);
- exit(1);
- }
- gz_compress(in, out);
-
- unlink(file);
-}
-
-
-/* ===========================================================================
- * Uncompress the given file and remove the original.
- */
-void file_uncompress(file)
- char *file;
-{
- local char buf[MAX_NAME_LEN];
- char *infile, *outfile;
- FILE *out;
- gzFile in;
- size_t len = strlen(file);
-
- if (len + strlen(GZ_SUFFIX) >= sizeof(buf)) {
- fprintf(stderr, "%s: filename too long\n", prog);
- exit(1);
- }
-
- strcpy(buf, file);
-
- if (len > SUFFIX_LEN && strcmp(file+len-SUFFIX_LEN, GZ_SUFFIX) == 0) {
- infile = file;
- outfile = buf;
- outfile[len-3] = '\0';
- } else {
- outfile = file;
- infile = buf;
- strcat(infile, GZ_SUFFIX);
- }
- in = gzopen(infile, "rb");
- if (in == NULL) {
- fprintf(stderr, "%s: can't gzopen %s\n", prog, infile);
- exit(1);
- }
- out = fopen(outfile, "wb");
- if (out == NULL) {
- perror(file);
- exit(1);
- }
-
- gz_uncompress(in, out);
-
- unlink(infile);
-}
-
-
-/* ===========================================================================
- * Usage: minigzip [-c] [-d] [-f] [-h] [-r] [-1 to -9] [files...]
- * -c : write to standard output
- * -d : decompress
- * -f : compress with Z_FILTERED
- * -h : compress with Z_HUFFMAN_ONLY
- * -r : compress with Z_RLE
- * -1 to -9 : compression level
- */
-
-int main(argc, argv)
- int argc;
- char *argv[];
-{
- int copyout = 0;
- int uncompr = 0;
- gzFile file;
- char *bname, outmode[20];
-
- strcpy(outmode, "wb6 ");
-
- prog = argv[0];
- bname = strrchr(argv[0], '/');
- if (bname)
- bname++;
- else
- bname = argv[0];
- argc--, argv++;
-
- if (!strcmp(bname, "gunzip"))
- uncompr = 1;
- else if (!strcmp(bname, "zcat"))
- copyout = uncompr = 1;
-
- while (argc > 0) {
- if (strcmp(*argv, "-c") == 0)
- copyout = 1;
- else if (strcmp(*argv, "-d") == 0)
- uncompr = 1;
- else if (strcmp(*argv, "-f") == 0)
- outmode[3] = 'f';
- else if (strcmp(*argv, "-h") == 0)
- outmode[3] = 'h';
- else if (strcmp(*argv, "-r") == 0)
- outmode[3] = 'R';
- else if ((*argv)[0] == '-' && (*argv)[1] >= '1' && (*argv)[1] <= '9' &&
- (*argv)[2] == 0)
- outmode[2] = (*argv)[1];
- else
- break;
- argc--, argv++;
- }
- if (outmode[3] == ' ')
- outmode[3] = 0;
- if (argc == 0) {
- SET_BINARY_MODE(stdin);
- SET_BINARY_MODE(stdout);
- if (uncompr) {
- file = gzdopen(fileno(stdin), "rb");
- if (file == NULL) error("can't gzdopen stdin");
- gz_uncompress(file, stdout);
- } else {
- file = gzdopen(fileno(stdout), outmode);
- if (file == NULL) error("can't gzdopen stdout");
- gz_compress(stdin, file);
- }
- } else {
- if (copyout) {
- SET_BINARY_MODE(stdout);
- }
- do {
- if (uncompr) {
- if (copyout) {
- file = gzopen(*argv, "rb");
- if (file == NULL)
- fprintf(stderr, "%s: can't gzopen %s\n", prog, *argv);
- else
- gz_uncompress(file, stdout);
- } else {
- file_uncompress(*argv);
- }
- } else {
- if (copyout) {
- FILE * in = fopen(*argv, "rb");
-
- if (in == NULL) {
- perror(*argv);
- } else {
- file = gzdopen(fileno(stdout), outmode);
- if (file == NULL) error("can't gzdopen stdout");
-
- gz_compress(in, file);
- }
-
- } else {
- file_compress(*argv, outmode);
- }
- }
- } while (argv++, --argc);
- }
- return 0;
-}
/* trees.c -- output deflated data using Huffman coding
- * Copyright (C) 1995-2010 Jean-loup Gailly
+ * Copyright (C) 1995-2012 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
*/
* probability, to avoid transmitting the lengths for unused bit length codes.
*/
-#define Buf_size (8 * 2*sizeof(char))
-/* Number of bits used within bi_buf. (bi_buf might be implemented on
- * more than 16 bits on some systems.)
- */
-
/* ===========================================================================
* Local data. These are initialized only once.
*/
s->bi_buf = 0;
s->bi_valid = 0;
- s->last_eob_len = 8; /* enough lookahead for inflate */
#ifdef DEBUG
s->compressed_len = 0L;
s->bits_sent = 0L;
copy_block(s, buf, (unsigned)stored_len, 1); /* with header */
}
+/* ===========================================================================
+ * Flush the bits in the bit buffer to pending output (leaves at most 7 bits)
+ */
+void ZLIB_INTERNAL _tr_flush_bits(s)
+ deflate_state *s;
+{
+ bi_flush(s);
+}
+
/* ===========================================================================
* Send one empty static block to give enough lookahead for inflate.
* This takes 10 bits, of which 7 may remain in the bit buffer.
- * The current inflate code requires 9 bits of lookahead. If the
- * last two codes for the previous block (real code plus EOB) were coded
- * on 5 bits or less, inflate may have only 5+3 bits of lookahead to decode
- * the last real code. In this case we send two empty static blocks instead
- * of one. (There are no problems if the previous block is stored or fixed.)
- * To simplify the code, we assume the worst case of last real code encoded
- * on one bit only.
*/
void ZLIB_INTERNAL _tr_align(s)
deflate_state *s;
s->compressed_len += 10L; /* 3 for block type, 7 for EOB */
#endif
bi_flush(s);
- /* Of the 10 bits for the empty block, we have already sent
- * (10 - bi_valid) bits. The lookahead for the last real code (before
- * the EOB of the previous block) was thus at least one plus the length
- * of the EOB plus what we have just sent of the empty static block.
- */
- if (1 + s->last_eob_len + 10 - s->bi_valid < 9) {
- send_bits(s, STATIC_TREES<<1, 3);
- send_code(s, END_BLOCK, static_ltree);
-#ifdef DEBUG
- s->compressed_len += 10L;
-#endif
- bi_flush(s);
- }
- s->last_eob_len = 7;
}
/* ===========================================================================
} while (lx < s->last_lit);
send_code(s, END_BLOCK, ltree);
- s->last_eob_len = ltree[END_BLOCK].Len;
}
/* ===========================================================================
int header; /* true if block header must be written */
{
bi_windup(s); /* align on byte boundary */
- s->last_eob_len = 8; /* enough lookahead for inflate */
if (header) {
put_short(s, (ush)len);
/* zconf.h -- configuration of the zlib compression library
- * Copyright (C) 1995-2010 Jean-loup Gailly.
+ * Copyright (C) 1995-2011 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
* this permanently in zconf.h using "./configure --zprefix".
*/
#ifdef Z_PREFIX /* may be set to #if 1 by ./configure */
+# define Z_PREFIX_SET
/* all linked symbols */
# define _dist_code z__dist_code
# define adler32 z_adler32
# define adler32_combine z_adler32_combine
# define adler32_combine64 z_adler32_combine64
-# define compress z_compress
-# define compress2 z_compress2
-# define compressBound z_compressBound
+# ifndef Z_SOLO
+# define compress z_compress
+# define compress2 z_compress2
+# define compressBound z_compressBound
+# endif
# define crc32 z_crc32
# define crc32_combine z_crc32_combine
# define crc32_combine64 z_crc32_combine64
# define deflateInit2_ z_deflateInit2_
# define deflateInit_ z_deflateInit_
# define deflateParams z_deflateParams
+# define deflatePending z_deflatePending
# define deflatePrime z_deflatePrime
# define deflateReset z_deflateReset
+# define deflateResetKeep z_deflateResetKeep
# define deflateSetDictionary z_deflateSetDictionary
# define deflateSetHeader z_deflateSetHeader
# define deflateTune z_deflateTune
# define deflate_copyright z_deflate_copyright
# define get_crc_table z_get_crc_table
-# define gz_error z_gz_error
-# define gz_intmax z_gz_intmax
-# define gz_strwinerror z_gz_strwinerror
-# define gzbuffer z_gzbuffer
-# define gzclearerr z_gzclearerr
-# define gzclose z_gzclose
-# define gzclose_r z_gzclose_r
-# define gzclose_w z_gzclose_w
-# define gzdirect z_gzdirect
-# define gzdopen z_gzdopen
-# define gzeof z_gzeof
-# define gzerror z_gzerror
-# define gzflush z_gzflush
-# define gzgetc z_gzgetc
-# define gzgets z_gzgets
-# define gzoffset z_gzoffset
-# define gzoffset64 z_gzoffset64
-# define gzopen z_gzopen
-# define gzopen64 z_gzopen64
-# define gzprintf z_gzprintf
-# define gzputc z_gzputc
-# define gzputs z_gzputs
-# define gzread z_gzread
-# define gzrewind z_gzrewind
-# define gzseek z_gzseek
-# define gzseek64 z_gzseek64
-# define gzsetparams z_gzsetparams
-# define gztell z_gztell
-# define gztell64 z_gztell64
-# define gzungetc z_gzungetc
-# define gzwrite z_gzwrite
+# ifndef Z_SOLO
+# define gz_error z_gz_error
+# define gz_intmax z_gz_intmax
+# define gz_strwinerror z_gz_strwinerror
+# define gzbuffer z_gzbuffer
+# define gzclearerr z_gzclearerr
+# define gzclose z_gzclose
+# define gzclose_r z_gzclose_r
+# define gzclose_w z_gzclose_w
+# define gzdirect z_gzdirect
+# define gzdopen z_gzdopen
+# define gzeof z_gzeof
+# define gzerror z_gzerror
+# define gzflags z_gzflags
+# define gzflush z_gzflush
+# define gzgetc z_gzgetc
+# define gzgetc_ z_gzgetc_
+# define gzgets z_gzgets
+# define gzoffset z_gzoffset
+# define gzoffset64 z_gzoffset64
+# define gzopen z_gzopen
+# define gzopen64 z_gzopen64
+# define gzprintf z_gzprintf
+# define gzputc z_gzputc
+# define gzputs z_gzputs
+# define gzread z_gzread
+# define gzrewind z_gzrewind
+# define gzseek z_gzseek
+# define gzseek64 z_gzseek64
+# define gzsetparams z_gzsetparams
+# define gztell z_gztell
+# define gztell64 z_gztell64
+# define gzungetc z_gzungetc
+# define gzwrite z_gzwrite
+# endif
# define inflate z_inflate
# define inflateBack z_inflateBack
# define inflateBackEnd z_inflateBackEnd
# define inflateSync z_inflateSync
# define inflateSyncPoint z_inflateSyncPoint
# define inflateUndermine z_inflateUndermine
+# define inflateResetKeep z_inflateResetKeep
# define inflate_copyright z_inflate_copyright
# define inflate_fast z_inflate_fast
# define inflate_table z_inflate_table
-# define uncompress z_uncompress
+# ifndef Z_SOLO
+# define uncompress z_uncompress
+# endif
# define zError z_zError
-# define zcalloc z_zcalloc
-# define zcfree z_zcfree
+# ifndef Z_SOLO
+# define zcalloc z_zcalloc
+# define zcfree z_zcfree
+# endif
# define zlibCompileFlags z_zlibCompileFlags
# define zlibVersion z_zlibVersion
# define alloc_func z_alloc_func
# define charf z_charf
# define free_func z_free_func
-# define gzFile z_gzFile
-# define gz_header z_gz_header
-# define gz_headerp z_gz_headerp
+# ifndef Z_SOLO
+# define gzFile z_gzFile
+# define gz_header z_gz_header
+# define gz_headerp z_gz_headerp
+# endif
# define in_func z_in_func
# define intf z_intf
# define out_func z_out_func
# define voidpf z_voidpf
/* all zlib structs in zlib.h and zconf.h */
-# define gz_header_s z_gz_header_s
+# ifndef Z_SOLO
+# define gz_header_s z_gz_header_s
+# endif
# define internal_state z_internal_state
#endif
# endif
#endif
+#if defined(ZLIB_CONST) && !defined(z_const)
+# define z_const const
+#else
+# 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
# endif
#endif
+#ifndef Z_ARG /* function prototypes for stdarg */
+# if defined(STDC) || defined(Z_HAVE_STDARG_H)
+# define Z_ARG(args) args
+# else
+# define Z_ARG(args) ()
+# endif
+#endif
+
/* The following definitions for FAR are needed only for MSDOS mixed
* model programming (small or medium model with some far allocations).
* This was tested only with MSC; for other MSDOS compilers you may have
typedef Byte *voidp;
#endif
-#if !defined(_MSC_VER)
+#ifdef HAVE_UNISTD_H /* may be set to #if 1 by ./configure */
# define Z_HAVE_UNISTD_H
#endif
+#ifdef HAVE_STDARG_H /* may be set to #if 1 by ./configure */
+# define Z_HAVE_STDARG_H
+#endif
+
#ifdef STDC
-# include <sys/types.h> /* for off_t */
+# ifndef Z_SOLO
+# include <sys/types.h> /* for off_t */
+# endif
#endif
/* a little trick to accommodate both "#define _LARGEFILE64_SOURCE" and
# undef _LARGEFILE64_SOURCE
#endif
-#if defined(Z_HAVE_UNISTD_H) || defined(_LARGEFILE64_SOURCE)
+#if defined(_LARGEFILE64_SOURCE) && _LFS64_LARGEFILE-0
+# define Z_LARGE
+#endif
+
+#if (defined(Z_HAVE_UNISTD_H) || defined(Z_LARGE)) && !defined(Z_SOLO)
# include <unistd.h> /* for SEEK_* and off_t */
# ifdef VMS
# include <unixio.h> /* for off_t */
# endif
#endif
-#ifndef SEEK_SET
+#if !defined(SEEK_SET) && !defined(Z_SOLO)
# define SEEK_SET 0 /* Seek from beginning of file. */
# define SEEK_CUR 1 /* Seek from current position. */
# define SEEK_END 2 /* Set file pointer to EOF plus "offset" */
# define z_off_t long
#endif
-#if defined(_LARGEFILE64_SOURCE) && _LFS64_LARGEFILE-0
+#if !defined(_WIN32) && (defined(_LARGEFILE64_SOURCE) && _LFS64_LARGEFILE-0)
# define z_off64_t off64_t
#else
+# if defined(_WIN32)
+# define z_off64_t __int64
+# else
# define z_off64_t z_off_t
#endif
-
-#if defined(__OS400__)
-# define NO_vsnprintf
-#endif
-
-#if defined(__MVS__)
-# define NO_vsnprintf
#endif
/* MVS linker does not support external names larger than 8 bytes */
/* zlib.h -- interface of the 'zlib' general purpose compression library
- version 1.2.5, April 19th, 2010
+ version 1.2.6, January 29th, 2012
- Copyright (C) 1995-2010 Jean-loup Gailly and Mark Adler
+ Copyright (C) 1995-2012 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
The data format used by the zlib library is described by RFCs (Request for
- Comments) 1950 to 1952 in the files http://www.ietf.org/rfc/rfc1950.txt
- (zlib format), rfc1951.txt (deflate format) and rfc1952.txt (gzip format).
+ Comments) 1950 to 1952 in the files http://tools.ietf.org/html/rfc1950
+ (zlib format), rfc1951 (deflate format) and rfc1952 (gzip format).
*/
#ifndef ZLIB_H
extern "C" {
#endif
-#define ZLIB_VERSION "1.2.5"
-#define ZLIB_VERNUM 0x1250
+#define ZLIB_VERSION "1.2.6"
+#define ZLIB_VERNUM 0x1260
#define ZLIB_VER_MAJOR 1
#define ZLIB_VER_MINOR 2
-#define ZLIB_VER_REVISION 5
+#define ZLIB_VER_REVISION 6
#define ZLIB_VER_SUBREVISION 0
/*
struct internal_state;
typedef struct z_stream_s {
- Bytef *next_in; /* next input byte */
+ z_const Bytef *next_in; /* next input byte */
uInt avail_in; /* number of bytes available at next_in */
- uLong total_in; /* total nb of input bytes read so far */
+ uLong total_in; /* total number of input bytes read so far */
Bytef *next_out; /* next output byte should be put there */
uInt avail_out; /* remaining free space at next_out */
- uLong total_out; /* total nb of bytes output so far */
+ uLong total_out; /* total number of bytes output so far */
- char *msg; /* last error message, NULL if no error */
+ z_const char *msg; /* last error message, NULL if no error */
struct internal_state FAR *state; /* not visible by applications */
alloc_func zalloc; /* used to allocate the internal state */
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). If deflate does not return
- Z_STREAM_END, then it must be called again as described above.
+ 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).
avail_out must be large enough to hold all the uncompressed data. (The size
of the uncompressed data may have been saved by the compressor for this
purpose.) The next operation on this stream must be inflateEnd to deallocate
- the decompression state. The use of Z_FINISH is never required, but can be
- used to inform inflate that a faster approach may be used for the single
- inflate() call.
+ the decompression state. 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 stream completes,
+ which reduces inflate's memory footprint.
In this implementation, inflate() always flushes as much output as
possible to the output buffer, and always uses the faster approach on the
- first call. So the only effect of the flush parameter in this implementation
- is on the return value of inflate(), as noted below, or when it returns early
- because Z_BLOCK or Z_TREES is used.
+ first call. So the effects of the flush parameter in this implementation are
+ on the return value of inflate() as noted below, when inflate() returns early
+ when Z_BLOCK or Z_TREES is used, and when inflate() avoids the allocation of
+ memory for a sliding window when Z_FINISH is used.
If a preset dictionary is needed after this call (see inflateSetDictionary
- below), inflate sets strm->adler to the adler32 checksum of the dictionary
+ below), inflate sets strm->adler to the Adler-32 checksum of the dictionary
chosen by the compressor and returns Z_NEED_DICT; otherwise it sets
- strm->adler to the adler32 checksum of all output produced so far (that is,
+ 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
checksum is equal to that saved by the compressor and returns Z_STREAM_END
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.
+ perform their own processing of the gzip header and trailer. 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.
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
uInt dictLength));
/*
Initializes the compression dictionary from the given byte sequence
- without producing any compressed output. This function must be called
- immediately after deflateInit, deflateInit2 or deflateReset, before any call
- of deflate. The compressor and decompressor must use exactly the same
- dictionary (see inflateSetDictionary).
+ without producing any compressed output. When using the zlib format, this
+ function must be called immediately after deflateInit, deflateInit2 or
+ deflateReset, and before any call of deflate. When doing raw deflate, this
+ function must be called either before any call of deflate, or immediately
+ after the completion of a deflate block, i.e. after all input has been
+ consumed and all output has been delivered when using any of the flush
+ options Z_BLOCK, Z_PARTIAL_FLUSH, Z_SYNC_FLUSH, or Z_FULL_FLUSH. The
+ compressor and decompressor must use exactly the same dictionary (see
+ inflateSetDictionary).
The dictionary should consist of strings (byte sequences) that are likely
to be encountered later in the data to be compressed, with the most commonly
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
inconsistent (for example if deflate has already been called for this stream
- or if the compression method is bsort). deflateSetDictionary does not
- perform any compression: this will be done by deflate().
+ or if not at a block boundary for raw deflate). deflateSetDictionary does
+ not perform any compression: this will be done by deflate().
*/
ZEXTERN int ZEXPORT deflateCopy OF((z_streamp dest,
deflation of sourceLen bytes. It must be called after deflateInit() or
deflateInit2(), and after deflateSetHeader(), if used. This would be used
to allocate an output buffer for deflation in a single pass, and so would be
- called before deflate().
-*/
+ called before deflate(). If that first deflate() call is provided the
+ sourceLen input bytes, an output buffer allocated to the size returned by
+ deflateBound(), and the flush value Z_FINISH, then deflate() is guaranteed
+ to return Z_STREAM_END. Note that it is possible for the compressed size to
+ be larger than the value returned by deflateBound() if flush options other
+ than Z_FINISH or Z_NO_FLUSH are used.
+*/
+
+ZEXTERN int ZEXPORT deflatePending OF((z_streamp strm,
+ unsigned *pending,
+ int *bits));
+/*
+ deflatePending() returns the number of bytes and bits of output that have
+ been generated, but not yet provided in the available output. The bytes not
+ provided would be due to the available output space having being consumed.
+ The number of bits of output not provided are between 0 and 7, where they
+ await more bits to join them in order to fill out a full byte. If pending
+ or bits are Z_NULL, then those values are not set.
+
+ deflatePending returns Z_OK if success, or Z_STREAM_ERROR if the source
+ stream state was inconsistent.
+ */
ZEXTERN int ZEXPORT deflatePrime OF((z_streamp strm,
int bits,
than or equal to 16, and that many of the least significant bits of value
will be inserted in the output.
- deflatePrime returns Z_OK if success, or Z_STREAM_ERROR if the source
- stream state was inconsistent.
+ deflatePrime returns Z_OK if success, Z_BUF_ERROR if there was not enough
+ room in the internal buffer to insert the bits, or Z_STREAM_ERROR if the
+ source stream state was inconsistent.
*/
ZEXTERN int ZEXPORT deflateSetHeader OF((z_streamp strm,
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.
The compressor and decompressor must use exactly the same dictionary (see
- deflateSetDictionary). For raw inflate, this function can be called
- immediately after inflateInit2() or inflateReset() and before any call of
- inflate() to set the dictionary. The application must insure that the
- dictionary that was used for compression is provided.
+ deflateSetDictionary). For raw inflate, this function can be called at any
+ time to set the dictionary. If the provided dictionary is smaller than the
+ window and there is already data in the window, then the provided dictionary
+ will amend what's there. The application must insure that the dictionary
+ that was used for compression is provided.
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
ZEXTERN int ZEXPORT inflateSync OF((z_streamp strm));
/*
- Skips invalid compressed data until a full flush point (see above the
- description of deflate with Z_FULL_FLUSH) can be found, or until all
+ Skips invalid compressed data until a possible full flush point (see above
+ for the description of deflate with Z_FULL_FLUSH) can be found, or until all
available input is skipped. No output is provided.
- inflateSync returns Z_OK if a full flush point has been found, Z_BUF_ERROR
- if no more input was provided, Z_DATA_ERROR if no flush point has been
- found, or Z_STREAM_ERROR if the stream structure was inconsistent. In the
- success case, the application may save the current current value of total_in
- which indicates where valid compressed data was found. In the error case,
- the application may repeatedly call inflateSync, providing more input each
- time, until success or end of the input data.
+ inflateSync searches for a 00 00 FF FF pattern in the compressed data.
+ All full flush points have this pattern, but not all occurences of this
+ pattern are full flush points.
+
+ inflateSync returns Z_OK if a possible full flush point has been found,
+ Z_BUF_ERROR if no more input was provided, Z_DATA_ERROR if no flush point
+ has been found, or Z_STREAM_ERROR if the stream structure was inconsistent.
+ In the success case, the application may save the current current value of
+ total_in which indicates where valid compressed data was found. In the
+ error case, the application may repeatedly call inflateSync, providing more
+ input each time, until success or end of the input data.
*/
ZEXTERN int ZEXPORT inflateCopy OF((z_streamp dest,
See inflateBack() for the usage of these routines.
inflateBackInit will return Z_OK on success, Z_STREAM_ERROR if any of
- the paramaters are invalid, Z_MEM_ERROR if the internal state could not be
+ the parameters are invalid, Z_MEM_ERROR if the internal state could not be
allocated, or Z_VERSION_ERROR if the version of the library does not match
the version of the header file.
*/
27-31: 0 (reserved)
*/
+#ifndef Z_SOLO
/* utility functions */
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 or incomplete.
+ buffer, or Z_DATA_ERROR if the input data was corrupted or incomplete. In
+ the case where there is not enough room, uncompress() will fill the output
+ buffer with the uncompressed data up to that point.
*/
-
/* gzip file access functions */
/*
wrapper, documented in RFC 1952, wrapped around a deflate stream.
*/
-typedef voidp gzFile; /* opaque gzip file descriptor */
+typedef struct gzFile_s *gzFile; /* semi-opaque gzip file descriptor */
/*
ZEXTERN gzFile ZEXPORT gzopen OF((const char *path, const char *mode));
a strategy: 'f' for filtered data as in "wb6f", 'h' for Huffman-only
compression as in "wb1h", 'R' for run-length encoding as in "wb1R", or 'F'
for fixed code compression as in "wb9F". (See the description of
- deflateInit2 for more information about the strategy parameter.) Also "a"
- can be used instead of "w" to request that the gzip stream that will be
- written be appended to the file. "+" will result in an error, since reading
- and writing to the same gzip file is not supported.
+ deflateInit2 for more information about the strategy parameter.) 'T' will
+ request transparent writing or appending with no compression and not using
+ the gzip format.
+
+ "a" can be used instead of "w" to request that the gzip stream that will
+ be written be appended to the file. "+" will result in an error, since
+ reading and writing to the same gzip file is not supported.
+
+ These functions, as well as gzip, will read and decode a sequence of gzip
+ streams in a file. The append function of gzopen() can be used to create
+ such a file. (Also see gzflush() for another way to do this.) When
+ appending, gzopen does not test whether the file begins with a gzip stream,
+ nor does it look for the end of the gzip streams to begin appending. gzopen
+ will simply append a gzip stream to the existing file.
gzopen can be used to read a file which is not in gzip format; in this
- case gzread will directly read from the file without decompression.
+ case gzread will directly read from the file without decompression. When
+ reading, this will be detected automatically by looking for the magic two-
+ byte gzip header.
gzopen returns NULL if the file could not be opened, if there was
insufficient memory to allocate the gzFile state, or if an invalid mode was
descriptor fd, just like fclose(fdopen(fd, mode)) closes the file descriptor
fd. If you want to keep fd open, use fd = dup(fd_keep); gz = gzdopen(fd,
mode);. The duplicated descriptor should be saved to avoid a leak, since
- gzdopen does not close fd if it fails.
+ gzdopen does not close fd if it fails. If you are using fileno() to get the
+ file descriptor from a FILE *, then you will have to use dup() to avoid
+ double-close()ing the file descriptor. Both gzclose() and fclose() will
+ close the associated file descriptor, so they need to have different file
+ descriptors.
gzdopen returns NULL if there was insufficient memory to allocate the
gzFile state, if an invalid mode was specified (an 'r', 'w', or 'a' was not
ZEXTERN int ZEXPORT gzread OF((gzFile file, voidp buf, unsigned len));
/*
Reads the given number of uncompressed bytes from the compressed file. If
- the input file was not in gzip format, gzread copies the given number of
- bytes into the buffer.
+ the input file is not in gzip format, gzread copies the given number of
+ bytes into the buffer directly from the file.
After reaching the end of a gzip stream in the input, gzread will continue
- to read, looking for another gzip stream, or failing that, reading the rest
- of the input file directly without decompression. The entire input file
- will be read if gzread is called until it returns less than the requested
- len.
+ to read, looking for another gzip stream. Any number of gzip streams may be
+ concatenated in the input file, and will all be decompressed by gzread().
+ If something other than a gzip stream is encountered after a gzip stream,
+ that remaining trailing garbage is ignored (and no error is returned).
+
+ gzread can be used to read a gzip file that is being concurrently written.
+ Upon reaching the end of the input, gzread will return with the available
+ data. If the error code returned by gzerror is Z_OK or Z_BUF_ERROR, then
+ gzclearerr can be used to clear the end of file indicator in order to permit
+ gzread to be tried again. Z_OK indicates that a gzip stream was completed
+ on the last gzread. Z_BUF_ERROR indicates that the input file ended in the
+ middle of a gzip stream. Note that gzread does not return -1 in the event
+ of an incomplete gzip stream. This error is deferred until gzclose(), which
+ will return Z_BUF_ERROR if the last gzread ended in the middle of a gzip
+ stream. Alternatively, gzerror can be used before gzclose to detect this
+ case.
gzread returns the number of uncompressed bytes actually read, less than
len for end of file, or -1 for error.
error.
*/
-ZEXTERN int ZEXPORTVA gzprintf OF((gzFile file, const char *format, ...));
+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
ZEXTERN int ZEXPORT gzgetc OF((gzFile file));
/*
Reads one byte from the compressed file. gzgetc returns this byte or -1
- in case of end of file or error.
+ in case of end of file or error. This is implemented as a macro for speed.
+ As such, it does not do all of the checking the other functions do. I.e.
+ it does not check to see if file is NULL, nor whether the structure file
+ points to has been clobbered or not.
*/
ZEXTERN int ZEXPORT gzungetc OF((int c, gzFile file));
ZEXTERN int ZEXPORT gzdirect OF((gzFile file));
/*
Returns true (1) if file is being copied directly while reading, or false
- (0) if file is a gzip stream being decompressed. This state can change from
- false to true while reading the input file if the end of a gzip stream is
- reached, but is followed by data that is not another gzip stream.
+ (0) if file is a gzip stream being decompressed.
If the input file is empty, gzdirect() will return true, since the input
does not contain a gzip stream.
cause buffers to be allocated to allow reading the file to determine if it
is a gzip file. Therefore if gzbuffer() is used, it should be called before
gzdirect().
+
+ When writing, gzdirect() returns true (1) if transparent writing was
+ requested ("wT" for the gzopen() mode), or false (0) otherwise. (Note:
+ gzdirect() is not needed when writing. Transparent writing must be
+ explicitly requested, so the application already knows the answer. When
+ linking statically, using gzdirect() will include all of the zlib code for
+ gzip file reading and decompression, which may not be desired.)
*/
ZEXTERN int ZEXPORT gzclose OF((gzFile file));
must not be called more than once on the same allocation.
gzclose will return Z_STREAM_ERROR if file is not valid, Z_ERRNO on a
- file operation error, or Z_OK on success.
+ file operation error, Z_MEM_ERROR if out of memory, Z_BUF_ERROR if the
+ last read ended in the middle of a gzip stream, or Z_OK on success.
*/
ZEXTERN int ZEXPORT gzclose_r OF((gzFile file));
file that is being written concurrently.
*/
+#endif /* !Z_SOLO */
/* checksum functions */
Combine two Adler-32 checksums into one. For two sequences of bytes, seq1
and seq2 with lengths len1 and len2, Adler-32 checksums were calculated for
each, adler1 and adler2. adler32_combine() returns the Adler-32 checksum of
- seq1 and seq2 concatenated, requiring only adler1, adler2, and len2.
+ seq1 and seq2 concatenated, requiring only adler1, adler2, and len2. Note
+ that the z_off_t type (like off_t) is a signed integer. If len2 is
+ negative, the result has no meaning or utility.
*/
ZEXTERN uLong ZEXPORT crc32 OF((uLong crc, const Bytef *buf, uInt len));
const char *version,
int stream_size));
#define deflateInit(strm, level) \
- deflateInit_((strm), (level), ZLIB_VERSION, sizeof(z_stream))
+ deflateInit_((strm), (level), ZLIB_VERSION, (int)sizeof(z_stream))
#define inflateInit(strm) \
- inflateInit_((strm), ZLIB_VERSION, sizeof(z_stream))
+ 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, sizeof(z_stream))
+ (strategy), ZLIB_VERSION, (int)sizeof(z_stream))
#define inflateInit2(strm, windowBits) \
- inflateInit2_((strm), (windowBits), ZLIB_VERSION, sizeof(z_stream))
+ inflateInit2_((strm), (windowBits), ZLIB_VERSION, \
+ (int)sizeof(z_stream))
#define inflateBackInit(strm, windowBits, window) \
inflateBackInit_((strm), (windowBits), (window), \
- ZLIB_VERSION, sizeof(z_stream))
+ ZLIB_VERSION, (int)sizeof(z_stream))
+
+#ifndef Z_SOLO
+
+/* gzgetc() macro and its supporting function and exposed data structure. Note
+ * that the real internal state is much larger than the exposed structure.
+ * This abbreviated structure exposes just enough for the gzgetc() macro. The
+ * user should not mess with these exposed elements, since their names or
+ * behavior could change in the future, perhaps even capriciously. They can
+ * only be used by the gzgetc() macro. You have been warned.
+ */
+struct gzFile_s {
+ unsigned have;
+ unsigned char *next;
+ z_off64_t pos;
+};
+ZEXTERN int ZEXPORT gzgetc_ OF((gzFile file));
+#define gzgetc(g) \
+ ((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) : gzgetc_(g))
/* provide 64-bit offset functions if _LARGEFILE64_SOURCE defined, and/or
* change the regular functions to 64 bits if _FILE_OFFSET_BITS is 64 (if
#endif
#if !defined(ZLIB_INTERNAL) && _FILE_OFFSET_BITS-0 == 64 && _LFS64_LARGEFILE-0
-# define gzopen gzopen64
-# define gzseek gzseek64
-# define gztell gztell64
-# define gzoffset gzoffset64
-# define adler32_combine adler32_combine64
-# define crc32_combine crc32_combine64
-# ifdef _LARGEFILE64_SOURCE
+# ifdef Z_PREFIX_SET
+# define z_gzopen z_gzopen64
+# define z_gzseek z_gzseek64
+# define z_gztell z_gztell64
+# define z_gzoffset z_gzoffset64
+# define z_adler32_combine z_adler32_combine64
+# define z_crc32_combine z_crc32_combine64
+# else
+# define gzopen gzopen64
+# define gzseek gzseek64
+# define gztell gztell64
+# define gzoffset gzoffset64
+# define adler32_combine adler32_combine64
+# define crc32_combine crc32_combine64
+# endif
+# ifndef _LARGEFILE64_SOURCE
ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *));
ZEXTERN z_off_t ZEXPORT gzseek64 OF((gzFile, z_off_t, int));
ZEXTERN z_off_t ZEXPORT gztell64 OF((gzFile));
ZEXTERN uLong ZEXPORT crc32_combine OF((uLong, uLong, z_off_t));
#endif
+#else /* Z_SOLO */
+
+ ZEXTERN uLong ZEXPORT adler32_combine OF((uLong, uLong, z_off_t));
+ ZEXTERN uLong ZEXPORT crc32_combine OF((uLong, uLong, z_off_t));
+
+#endif /* !Z_SOLO */
+
/* hack for buggy compilers */
#if !defined(ZUTIL_H) && !defined(NO_DUMMY_DECL)
struct internal_state {int dummy;};
ZEXTERN int ZEXPORT inflateSyncPoint OF((z_streamp));
ZEXTERN const uLongf * ZEXPORT get_crc_table OF((void));
ZEXTERN int ZEXPORT inflateUndermine OF((z_streamp, int));
+ZEXTERN int ZEXPORT inflateResetKeep OF((z_streamp));
+ZEXTERN int ZEXPORT deflateResetKeep OF((z_streamp));
+#ifndef Z_SOLO
+ ZEXTERN unsigned long ZEXPORT gzflags OF((void));
+#endif
#ifdef __cplusplus
}
/* zutil.c -- target dependent utility functions for the compression library
- * Copyright (C) 1995-2005, 2010 Jean-loup Gailly.
+ * Copyright (C) 1995-2005, 2010, 2011 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#ifdef FASTEST
flags += 1L << 21;
#endif
-#ifdef STDC
-# ifdef NO_vsnprintf
- flags += 1L << 25;
-# ifdef HAS_vsprintf_void
- flags += 1L << 26;
-# endif
-# else
-# ifdef HAS_vsnprintf_void
- flags += 1L << 26;
-# endif
-# endif
+#ifdef Z_SOLO
+ return flags;
#else
- flags += 1L << 24;
-# ifdef NO_snprintf
- flags += 1L << 25;
-# ifdef HAS_sprintf_void
- flags += 1L << 26;
-# endif
-# else
-# ifdef HAS_snprintf_void
- flags += 1L << 26;
-# endif
-# endif
+ return flags + gzflags();
#endif
- return flags;
}
#ifdef DEBUG
}
#endif
+#ifndef Z_SOLO
#ifdef SYS16BIT
}
#endif /* MY_ZCALLOC */
+
+#endif /* !Z_SOLO */
/* zutil.h -- internal interface and configuration of the compression library
- * Copyright (C) 1995-2010 Jean-loup Gailly.
+ * Copyright (C) 1995-2011 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
#include "zlib.h"
-#ifdef STDC
+#if defined(STDC) && !defined(Z_SOLO)
# if !(defined(_WIN32_WCE) && defined(_MSC_VER))
# include <stddef.h>
# endif
# include <stdlib.h>
#endif
+#ifdef Z_SOLO
+ typedef long ptrdiff_t; /* guess -- will be caught if guess is wrong */
+#endif
+
#ifndef local
# define local static
#endif
#if defined(MSDOS) || (defined(WINDOWS) && !defined(WIN32))
# define OS_CODE 0x00
-# if defined(__TURBOC__) || defined(__BORLANDC__)
-# if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
- /* Allow compilation with ANSI keywords only enabled */
- void _Cdecl farfree( void *block );
- void *_Cdecl farmalloc( unsigned long nbytes );
-# else
-# include <alloc.h>
+# ifndef Z_SOLO
+# if defined(__TURBOC__) || defined(__BORLANDC__)
+# if (__STDC__ == 1) && (defined(__LARGE__) || defined(__COMPACT__))
+ /* Allow compilation with ANSI keywords only enabled */
+ void _Cdecl farfree( void *block );
+ void *_Cdecl farmalloc( unsigned long nbytes );
+# else
+# include <alloc.h>
+# endif
+# else /* MSC or DJGPP */
+# include <malloc.h>
# endif
-# else /* MSC or DJGPP */
-# include <malloc.h>
# endif
#endif
#ifdef OS2
# define OS_CODE 0x06
-# ifdef M_I86
+# if defined(M_I86) && !defined(Z_SOLO)
# include <malloc.h>
# endif
#endif
#if defined(MACOS) || defined(TARGET_OS_MAC)
# define OS_CODE 0x07
-# if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
-# include <unix.h> /* for fdopen */
-# else
-# ifndef fdopen
-# define fdopen(fd,mode) NULL /* No fdopen() */
+# ifndef Z_SOLO
+# if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
+# include <unix.h> /* for fdopen */
+# else
+# ifndef fdopen
+# define fdopen(fd,mode) NULL /* No fdopen() */
+# endif
# endif
# endif
#endif
# endif
#endif
-#if defined(__BORLANDC__)
+#if defined(__BORLANDC__) && !defined(MSDOS)
#pragma warn -8004
#pragma warn -8008
#pragma warn -8066
#endif
/* provide prototypes for these when building zlib without LFS */
-#if !defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0
+#if !defined(_WIN32) && (!defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0)
ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t));
ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t));
#endif
/* functions */
-#if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
-# ifndef HAVE_VSNPRINTF
-# define HAVE_VSNPRINTF
-# endif
-#endif
-#if defined(__CYGWIN__)
-# ifndef HAVE_VSNPRINTF
-# define HAVE_VSNPRINTF
-# endif
-#endif
-#ifndef HAVE_VSNPRINTF
-# ifdef MSDOS
- /* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
- but for now we just assume it doesn't. */
-# define NO_vsnprintf
-# endif
-# ifdef __TURBOC__
-# define NO_vsnprintf
-# endif
-# ifdef WIN32
- /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
-# if !defined(vsnprintf) && !defined(NO_vsnprintf)
-# if !defined(_MSC_VER) || ( defined(_MSC_VER) && _MSC_VER < 1500 )
-# define vsnprintf _vsnprintf
-# endif
-# endif
-# endif
-# ifdef __SASC
-# define NO_vsnprintf
-# endif
-#endif
-#ifdef VMS
-# define NO_vsnprintf
-#endif
-
-#if defined(pyr)
+#if defined(pyr) || defined(Z_SOLO)
# define NO_MEMCPY
#endif
#if defined(SMALL_MEDIUM) && !defined(_MSC_VER) && !defined(__SC__)
# define Tracecv(c,x)
#endif
-
-voidpf ZLIB_INTERNAL zcalloc OF((voidpf opaque, unsigned items,
- unsigned size));
-void ZLIB_INTERNAL zcfree OF((voidpf opaque, voidpf ptr));
+#ifndef Z_SOLO
+ voidpf ZLIB_INTERNAL zcalloc OF((voidpf opaque, unsigned items,
+ unsigned size));
+ void ZLIB_INTERNAL zcfree OF((voidpf opaque, voidpf ptr));
+#endif
#define ZALLOC(strm, items, size) \
(*((strm)->zalloc))((strm)->opaque, (items), (size))
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