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upgraded bundled zlib to 1.2.11

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This commit is contained in:
Guenter Obiltschnig 2017-01-25 10:14:40 +01:00
parent be4acf00c9
commit c117619e1e
16 changed files with 1443 additions and 858 deletions
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39
Foundation/include/Poco/zconf.h
View File

@ -17,7 +17,7 @@
#ifdef Z_PREFIX /* may be set to #if 1 by ./configure */ #ifdef Z_PREFIX /* may be set to #if 1 by ./configure */
# define Z_PREFIX_SET # define Z_PREFIX_SET
/* all linked symbols */ /* all linked symbols and init macros */
# define _dist_code z__dist_code # define _dist_code z__dist_code
# define _length_code z__length_code # define _length_code z__length_code
# define _tr_align z__tr_align # define _tr_align z__tr_align
@ -29,6 +29,7 @@
# define adler32 z_adler32 # define adler32 z_adler32
# define adler32_combine z_adler32_combine # define adler32_combine z_adler32_combine
# define adler32_combine64 z_adler32_combine64 # define adler32_combine64 z_adler32_combine64
# define adler32_z z_adler32_z
# ifndef Z_SOLO # ifndef Z_SOLO
# define compress z_compress # define compress z_compress
# define compress2 z_compress2 # define compress2 z_compress2
@ -37,10 +38,14 @@
# define crc32 z_crc32 # define crc32 z_crc32
# define crc32_combine z_crc32_combine # define crc32_combine z_crc32_combine
# define crc32_combine64 z_crc32_combine64 # define crc32_combine64 z_crc32_combine64
# define crc32_z z_crc32_z
# define deflate z_deflate # define deflate z_deflate
# define deflateBound z_deflateBound # define deflateBound z_deflateBound
# define deflateCopy z_deflateCopy # define deflateCopy z_deflateCopy
# define deflateEnd z_deflateEnd # define deflateEnd z_deflateEnd
# define deflateGetDictionary z_deflateGetDictionary
# define deflateInit z_deflateInit
# define deflateInit2 z_deflateInit2
# define deflateInit2_ z_deflateInit2_ # define deflateInit2_ z_deflateInit2_
# define deflateInit_ z_deflateInit_ # define deflateInit_ z_deflateInit_
# define deflateParams z_deflateParams # define deflateParams z_deflateParams
@ -67,6 +72,8 @@
# define gzeof z_gzeof # define gzeof z_gzeof
# define gzerror z_gzerror # define gzerror z_gzerror
# define gzflush z_gzflush # define gzflush z_gzflush
# define gzfread z_gzfread
# define gzfwrite z_gzfwrite
# define gzgetc z_gzgetc # define gzgetc z_gzgetc
# define gzgetc_ z_gzgetc_ # define gzgetc_ z_gzgetc_
# define gzgets z_gzgets # define gzgets z_gzgets
@ -78,7 +85,6 @@
# define gzopen_w z_gzopen_w # define gzopen_w z_gzopen_w
# endif # endif
# define gzprintf z_gzprintf # define gzprintf z_gzprintf
# define gzvprintf z_gzvprintf
# define gzputc z_gzputc # define gzputc z_gzputc
# define gzputs z_gzputs # define gzputs z_gzputs
# define gzread z_gzread # define gzread z_gzread
@ -89,32 +95,39 @@
# define gztell z_gztell # define gztell z_gztell
# define gztell64 z_gztell64 # define gztell64 z_gztell64
# define gzungetc z_gzungetc # define gzungetc z_gzungetc
# define gzvprintf z_gzvprintf
# define gzwrite z_gzwrite # define gzwrite z_gzwrite
# endif # endif
# define inflate z_inflate # define inflate z_inflate
# define inflateBack z_inflateBack # define inflateBack z_inflateBack
# define inflateBackEnd z_inflateBackEnd # define inflateBackEnd z_inflateBackEnd
# define inflateBackInit z_inflateBackInit
# define inflateBackInit_ z_inflateBackInit_ # define inflateBackInit_ z_inflateBackInit_
# define inflateCodesUsed z_inflateCodesUsed
# define inflateCopy z_inflateCopy # define inflateCopy z_inflateCopy
# define inflateEnd z_inflateEnd # define inflateEnd z_inflateEnd
# define inflateGetDictionary z_inflateGetDictionary
# define inflateGetHeader z_inflateGetHeader # define inflateGetHeader z_inflateGetHeader
# define inflateInit z_inflateInit
# define inflateInit2 z_inflateInit2
# define inflateInit2_ z_inflateInit2_ # define inflateInit2_ z_inflateInit2_
# define inflateInit_ z_inflateInit_ # define inflateInit_ z_inflateInit_
# define inflateMark z_inflateMark # define inflateMark z_inflateMark
# define inflatePrime z_inflatePrime # define inflatePrime z_inflatePrime
# define inflateReset z_inflateReset # define inflateReset z_inflateReset
# define inflateReset2 z_inflateReset2 # define inflateReset2 z_inflateReset2
# define inflateResetKeep z_inflateResetKeep
# define inflateSetDictionary z_inflateSetDictionary # define inflateSetDictionary z_inflateSetDictionary
# define inflateGetDictionary z_inflateGetDictionary
# define inflateSync z_inflateSync # define inflateSync z_inflateSync
# define inflateSyncPoint z_inflateSyncPoint # define inflateSyncPoint z_inflateSyncPoint
# define inflateUndermine z_inflateUndermine # define inflateUndermine z_inflateUndermine
# define inflateResetKeep z_inflateResetKeep # define inflateValidate z_inflateValidate
# define inflate_copyright z_inflate_copyright # define inflate_copyright z_inflate_copyright
# define inflate_fast z_inflate_fast # define inflate_fast z_inflate_fast
# define inflate_table z_inflate_table # define inflate_table z_inflate_table
# ifndef Z_SOLO # ifndef Z_SOLO
# define uncompress z_uncompress # define uncompress z_uncompress
# define uncompress2 z_uncompress2
# endif # endif
# define zError z_zError # define zError z_zError
# ifndef Z_SOLO # ifndef Z_SOLO
@ -224,9 +237,19 @@
# define z_const # define z_const
#endif #endif
/* Some Mac compilers merge all .h files incorrectly: */ #ifdef Z_SOLO
#if defined(__MWERKS__)||defined(applec)||defined(THINK_C)||defined(__SC__) typedef unsigned long z_size_t;
# define NO_DUMMY_DECL #else
# define z_longlong long long
# if defined(NO_SIZE_T)
typedef unsigned NO_SIZE_T z_size_t;
# elif defined(STDC)
# include <stddef.h>
typedef size_t z_size_t;
# else
typedef unsigned long z_size_t;
# endif
# undef z_longlong
#endif #endif
/* Maximum value for memLevel in deflateInit2 */ /* Maximum value for memLevel in deflateInit2 */
@ -256,7 +279,7 @@
Of course this will generally degrade compression (there's no free lunch). Of course this will generally degrade compression (there's no free lunch).
The memory requirements for inflate are (in bytes) 1 << windowBits The memory requirements for inflate are (in bytes) 1 << windowBits
that is, 32K for windowBits=15 (default value) plus a few kilobytes that is, 32K for windowBits=15 (default value) plus about 7 kilobytes
for small objects. for small objects.
*/ */

444
Foundation/include/Poco/zlib.h
View File

@ -1,7 +1,7 @@
/* zlib.h -- interface of the 'zlib' general purpose compression library /* zlib.h -- interface of the 'zlib' general purpose compression library
version 1.2.8, April 28th, 2013 version 1.2.11, January 15th, 2017
Copyright (C) 1995-2013 Jean-loup Gailly and Mark Adler Copyright (C) 1995-2017 Jean-loup Gailly and Mark Adler
This software is provided 'as-is', without any express or implied This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages warranty. In no event will the authors be held liable for any damages
@ -37,11 +37,11 @@
extern "C" { extern "C" {
#endif #endif
#define ZLIB_VERSION "1.2.8" #define ZLIB_VERSION "1.2.11"
#define ZLIB_VERNUM 0x1280 #define ZLIB_VERNUM 0x12b0
#define ZLIB_VER_MAJOR 1 #define ZLIB_VER_MAJOR 1
#define ZLIB_VER_MINOR 2 #define ZLIB_VER_MINOR 2
#define ZLIB_VER_REVISION 8 #define ZLIB_VER_REVISION 11
#define ZLIB_VER_SUBREVISION 0 #define ZLIB_VER_SUBREVISION 0
/* /*
@ -65,7 +65,8 @@ extern "C" {
with "gz". The gzip format is different from the zlib format. gzip is a with "gz". The gzip format is different from the zlib format. gzip is a
gzip wrapper, documented in RFC 1952, wrapped around a deflate stream. gzip wrapper, documented in RFC 1952, wrapped around a deflate stream.
This library can optionally read and write gzip streams in memory as well. This library can optionally read and write gzip and raw deflate streams in
memory as well.
The zlib format was designed to be compact and fast for use in memory The zlib format was designed to be compact and fast for use in memory
and on communications channels. The gzip format was designed for single- and on communications channels. The gzip format was designed for single-
@ -74,7 +75,7 @@ extern "C" {
The library does not install any signal handler. The decoder checks The library does not install any signal handler. The decoder checks
the consistency of the compressed data, so the library should never crash the consistency of the compressed data, so the library should never crash
even in case of corrupted input. even in the case of corrupted input.
*/ */
typedef voidpf (*alloc_func) OF((voidpf opaque, uInt items, uInt size)); typedef voidpf (*alloc_func) OF((voidpf opaque, uInt items, uInt size));
@ -87,7 +88,7 @@ typedef struct z_stream_s {
uInt avail_in; /* number of bytes available at next_in */ uInt avail_in; /* number of bytes available at next_in */
uLong total_in; /* total number 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 */ Bytef *next_out; /* next output byte will go here */
uInt avail_out; /* remaining free space at next_out */ uInt avail_out; /* remaining free space at next_out */
uLong total_out; /* total number of bytes output so far */ uLong total_out; /* total number of bytes output so far */
@ -98,8 +99,9 @@ typedef struct z_stream_s {
free_func zfree; /* used to free the internal state */ free_func zfree; /* used to free the internal state */
voidpf opaque; /* private data object passed to zalloc and zfree */ voidpf opaque; /* private data object passed to zalloc and zfree */
int data_type; /* best guess about the data type: binary or text */ int data_type; /* best guess about the data type: binary or text
uLong adler; /* adler32 value of the uncompressed data */ for deflate, or the decoding state for inflate */
uLong adler; /* Adler-32 or CRC-32 value of the uncompressed data */
uLong reserved; /* reserved for future use */ uLong reserved; /* reserved for future use */
} z_stream; } z_stream;
@ -142,7 +144,9 @@ typedef gz_header FAR *gz_headerp;
zalloc must return Z_NULL if there is not enough memory for the object. zalloc must return Z_NULL if there is not enough memory for the object.
If zlib is used in a multi-threaded application, zalloc and zfree must be If zlib is used in a multi-threaded application, zalloc and zfree must be
thread safe. thread safe. In that case, zlib is thread-safe. When zalloc and zfree are
Z_NULL on entry to the initialization function, they are set to internal
routines that use the standard library functions malloc() and free().
On 16-bit systems, the functions zalloc and zfree must be able to allocate On 16-bit systems, the functions zalloc and zfree must be able to allocate
exactly 65536 bytes, but will not be required to allocate more than this if exactly 65536 bytes, but will not be required to allocate more than this if
@ -155,7 +159,7 @@ typedef gz_header FAR *gz_headerp;
The fields total_in and total_out can be used for statistics or progress The fields total_in and total_out can be used for statistics or progress
reports. After compression, total_in holds the total size of the reports. After compression, total_in holds the total size of the
uncompressed data and may be saved for use in the decompressor (particularly uncompressed data and may be saved for use by the decompressor (particularly
if the decompressor wants to decompress everything in a single step). if the decompressor wants to decompress everything in a single step).
*/ */
@ -200,7 +204,7 @@ typedef gz_header FAR *gz_headerp;
#define Z_TEXT 1 #define Z_TEXT 1
#define Z_ASCII Z_TEXT /* for compatibility with 1.2.2 and earlier */ #define Z_ASCII Z_TEXT /* for compatibility with 1.2.2 and earlier */
#define Z_UNKNOWN 2 #define Z_UNKNOWN 2
/* Possible values of the data_type field (though see inflate()) */ /* Possible values of the data_type field for deflate() */
#define Z_DEFLATED 8 #define Z_DEFLATED 8
/* The deflate compression method (the only one supported in this version) */ /* The deflate compression method (the only one supported in this version) */
@ -258,11 +262,11 @@ ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));
enough room in the output buffer), next_in and avail_in are updated and enough room in the output buffer), next_in and avail_in are updated and
processing will resume at this point for the next call of deflate(). processing will resume at this point for the next call of deflate().
- Provide more output starting at next_out and update next_out and avail_out - Generate more output starting at next_out and update next_out and avail_out
accordingly. This action is forced if the parameter flush is non zero. accordingly. This action is forced if the parameter flush is non zero.
Forcing flush frequently degrades the compression ratio, so this parameter Forcing flush frequently degrades the compression ratio, so this parameter
should be set only when necessary (in interactive applications). Some should be set only when necessary. Some output may be provided even if
output may be provided even if flush is not set. flush is zero.
Before the call of deflate(), the application should ensure that at least Before the call of deflate(), the application should ensure that at least
one of the actions is possible, by providing more input and/or consuming more one of the actions is possible, by providing more input and/or consuming more
@ -271,7 +275,9 @@ ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));
output when it wants, for example when the output buffer is full (avail_out output when it wants, for example when the output buffer is full (avail_out
== 0), or after each call of deflate(). If deflate returns Z_OK and with == 0), or after each call of deflate(). If deflate returns Z_OK and with
zero avail_out, it must be called again after making room in the output zero avail_out, it must be called again after making room in the output
buffer because there might be more output pending. buffer because there might be more output pending. See deflatePending(),
which can be used if desired to determine whether or not there is more ouput
in that case.
Normally the parameter flush is set to Z_NO_FLUSH, which allows deflate to Normally the parameter flush is set to Z_NO_FLUSH, which allows deflate to
decide how much data to accumulate before producing output, in order to decide how much data to accumulate before producing output, in order to
@ -292,8 +298,8 @@ ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));
input data so far will be available to the decompressor, as for Z_SYNC_FLUSH. input data so far will be available to the decompressor, as for Z_SYNC_FLUSH.
This completes the current deflate block and follows it with an empty fixed This completes the current deflate block and follows it with an empty fixed
codes block that is 10 bits long. This assures that enough bytes are output codes block that is 10 bits long. This assures that enough bytes are output
in order for the decompressor to finish the block before the empty fixed code in order for the decompressor to finish the block before the empty fixed
block. codes block.
If flush is set to Z_BLOCK, a deflate block is completed and emitted, as If flush is set to Z_BLOCK, a deflate block is completed and emitted, as
for Z_SYNC_FLUSH, but the output is not aligned on a byte boundary, and up to for Z_SYNC_FLUSH, but the output is not aligned on a byte boundary, and up to
@ -319,34 +325,38 @@ ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));
If the parameter flush is set to Z_FINISH, pending input is processed, If the parameter flush is set to Z_FINISH, pending input is processed,
pending output is flushed and deflate returns with Z_STREAM_END if there was pending output is flushed and deflate returns with Z_STREAM_END if there was
enough output space; if deflate returns with Z_OK, this function must be enough output space. If deflate returns with Z_OK or Z_BUF_ERROR, this
called again with Z_FINISH and more output space (updated avail_out) but no function must be called again with Z_FINISH and more output space (updated
more input data, until it returns with Z_STREAM_END or an error. After avail_out) but no more input data, until it returns with Z_STREAM_END or an
deflate has returned Z_STREAM_END, the only possible operations on the stream error. After deflate has returned Z_STREAM_END, the only possible operations
are deflateReset or deflateEnd. on the stream are deflateReset or deflateEnd.
Z_FINISH can be used immediately after deflateInit if all the compression Z_FINISH can be used in the first deflate call after deflateInit if all the
is to be done in a single step. In this case, avail_out must be at least the compression is to be done in a single step. In order to complete in one
value returned by deflateBound (see below). Then deflate is guaranteed to call, avail_out must be at least the value returned by deflateBound (see
return Z_STREAM_END. If not enough output space is provided, deflate will below). Then deflate is guaranteed to return Z_STREAM_END. If not enough
not return Z_STREAM_END, and it must be called again as described above. 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 deflate() sets strm->adler to the Adler-32 checksum of all input read
so far (that is, total_in bytes). so far (that is, total_in bytes). If a gzip stream is being generated, then
strm->adler will be the CRC-32 checksum of the input read so far. (See
deflateInit2 below.)
deflate() may update strm->data_type if it can make a good guess about deflate() may update strm->data_type if it can make a good guess about
the input data type (Z_BINARY or Z_TEXT). In doubt, the data is considered the input data type (Z_BINARY or Z_TEXT). If in doubt, the data is
binary. This field is only for information purposes and does not affect the considered binary. This field is only for information purposes and does not
compression algorithm in any manner. affect the compression algorithm in any manner.
deflate() returns Z_OK if some progress has been made (more input deflate() returns Z_OK if some progress has been made (more input
processed or more output produced), Z_STREAM_END if all input has been processed or more output produced), Z_STREAM_END if all input has been
consumed and all output has been produced (only when flush is set to consumed and all output has been produced (only when flush is set to
Z_FINISH), Z_STREAM_ERROR if the stream state was inconsistent (for example Z_FINISH), Z_STREAM_ERROR if the stream state was inconsistent (for example
if next_in or next_out was Z_NULL), Z_BUF_ERROR if no progress is possible if next_in or next_out was Z_NULL or the state was inadvertently written over
(for example avail_in or avail_out was zero). Note that Z_BUF_ERROR is not by the application), or Z_BUF_ERROR if no progress is possible (for example
fatal, and deflate() can be called again with more input and more output avail_in or avail_out was zero). Note that Z_BUF_ERROR is not fatal, and
space to continue compressing. deflate() can be called again with more input and more output space to
continue compressing.
*/ */
@ -369,23 +379,21 @@ ZEXTERN int ZEXPORT inflateInit OF((z_streamp strm));
Initializes the internal stream state for decompression. The fields Initializes the internal stream state for decompression. The fields
next_in, avail_in, zalloc, zfree and opaque must be initialized before by next_in, avail_in, zalloc, zfree and opaque must be initialized before by
the caller. If next_in is not Z_NULL and avail_in is large enough (the the caller. In the current version of inflate, the provided input is not
exact value depends on the compression method), inflateInit determines the read or consumed. The allocation of a sliding window will be deferred to
compression method from the zlib header and allocates all data structures the first call of inflate (if the decompression does not complete on the
accordingly; otherwise the allocation will be deferred to the first call of first call). If zalloc and zfree are set to Z_NULL, inflateInit updates
inflate. If zalloc and zfree are set to Z_NULL, inflateInit updates them to them to use default allocation functions.
use default allocation functions.
inflateInit returns Z_OK if success, Z_MEM_ERROR if there was not enough inflateInit returns Z_OK if success, Z_MEM_ERROR if there was not enough
memory, Z_VERSION_ERROR if the zlib library version is incompatible with the memory, Z_VERSION_ERROR if the zlib library version is incompatible with the
version assumed by the caller, or Z_STREAM_ERROR if the parameters are version assumed by the caller, or Z_STREAM_ERROR if the parameters are
invalid, such as a null pointer to the structure. msg is set to null if invalid, such as a null pointer to the structure. msg is set to null if
there is no error message. inflateInit does not perform any decompression there is no error message. inflateInit does not perform any decompression.
apart from possibly reading the zlib header if present: actual decompression Actual decompression will be done by inflate(). So next_in, and avail_in,
will be done by inflate(). (So next_in and avail_in may be modified, but next_out, and avail_out are unused and unchanged. The current
next_out and avail_out are unused and unchanged.) The current implementation implementation of inflateInit() does not process any header information --
of inflateInit() does not process any header information -- that is deferred that is deferred until inflate() is called.
until inflate() is called.
*/ */
@ -401,17 +409,20 @@ ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush));
- Decompress more input starting at next_in and update next_in and avail_in - Decompress more input starting at next_in and update next_in and avail_in
accordingly. If not all input can be processed (because there is not accordingly. If not all input can be processed (because there is not
enough room in the output buffer), next_in is updated and processing will enough room in the output buffer), then next_in and avail_in are updated
resume at this point for the next call of inflate(). accordingly, and processing will resume at this point for the next call of
inflate().
- Provide more output starting at next_out and update next_out and avail_out - Generate more output starting at next_out and update next_out and avail_out
accordingly. inflate() provides as much output as possible, until there is accordingly. inflate() provides as much output as possible, until there is
no more input data or no more space in the output buffer (see below about no more input data or no more space in the output buffer (see below about
the flush parameter). the flush parameter).
Before the call of inflate(), the application should ensure that at least Before the call of inflate(), the application should ensure that at least
one of the actions is possible, by providing more input and/or consuming more one of the actions is possible, by providing more input and/or consuming more
output, and updating the next_* and avail_* values accordingly. The output, and updating the next_* and avail_* values accordingly. If the
caller of inflate() does not provide both available input and available
output space, it is possible that there will be no progress made. The
application can consume the uncompressed output when it wants, for example application can consume the uncompressed output when it wants, for example
when the output buffer is full (avail_out == 0), or after each call of when the output buffer is full (avail_out == 0), or after each call of
inflate(). If inflate returns Z_OK and with zero avail_out, it must be inflate(). If inflate returns Z_OK and with zero avail_out, it must be
@ -428,7 +439,7 @@ ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush));
gets to the end of that block, or when it runs out of data. gets to the end of that block, or when it runs out of data.
The Z_BLOCK option assists in appending to or combining deflate streams. The Z_BLOCK option assists in appending to or combining deflate streams.
Also to assist in this, on return inflate() will set strm->data_type to the To assist in this, on return inflate() always sets strm->data_type to the
number of unused bits in the last byte taken from strm->next_in, plus 64 if number of unused bits in the last byte taken from strm->next_in, plus 64 if
inflate() is currently decoding the last block in the deflate stream, plus inflate() is currently decoding the last block in the deflate stream, plus
128 if inflate() returned immediately after decoding an end-of-block code or 128 if inflate() returned immediately after decoding an end-of-block code or
@ -454,7 +465,7 @@ ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush));
this case all pending input is processed and all pending output is flushed; this case all pending input is processed and all pending output is flushed;
avail_out must be large enough to hold all of the uncompressed data for the avail_out must be large enough to hold all of the uncompressed data for the
operation to complete. (The size of the uncompressed data may have been operation to complete. (The size of the uncompressed data may have been
saved by the compressor for this purpose.) The use of Z_FINISH is not saved by the compressor for this purpose.) The use of Z_FINISH is not
required to perform an inflation in one step. However it may be used to 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() 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 call. Z_FINISH also informs inflate to not maintain a sliding window if the
@ -476,32 +487,33 @@ ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush));
chosen by the compressor and returns Z_NEED_DICT; otherwise it sets chosen by the compressor and returns Z_NEED_DICT; otherwise it sets
strm->adler to the Adler-32 checksum of all output produced so far (that is, 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 total_out bytes) and returns Z_OK, Z_STREAM_END or an error code as described
below. At the end of the stream, inflate() checks that its computed adler32 below. At the end of the stream, inflate() checks that its computed Adler-32
checksum is equal to that saved by the compressor and returns Z_STREAM_END checksum is equal to that saved by the compressor and returns Z_STREAM_END
only if the checksum is correct. only if the checksum is correct.
inflate() can decompress and check either zlib-wrapped or gzip-wrapped inflate() can decompress and check either zlib-wrapped or gzip-wrapped
deflate data. The header type is detected automatically, if requested when deflate data. The header type is detected automatically, if requested when
initializing with inflateInit2(). Any information contained in the gzip initializing with inflateInit2(). Any information contained in the gzip
header is not retained, so applications that need that information should header is not retained unless inflateGetHeader() is used. When processing
instead use raw inflate, see inflateInit2() below, or inflateBack() and
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 gzip-wrapped deflate data, strm->adler32 is set to the CRC-32 of the output
producted so far. The CRC-32 is checked against the gzip trailer. produced so far. The CRC-32 is checked against the gzip trailer, as is the
uncompressed length, modulo 2^32.
inflate() returns Z_OK if some progress has been made (more input processed 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 or more output produced), Z_STREAM_END if the end of the compressed data has
been reached and all uncompressed output has been produced, Z_NEED_DICT if a been reached and all uncompressed output has been produced, Z_NEED_DICT if a
preset dictionary is needed at this point, Z_DATA_ERROR if the input data was preset dictionary is needed at this point, Z_DATA_ERROR if the input data was
corrupted (input stream not conforming to the zlib format or incorrect check corrupted (input stream not conforming to the zlib format or incorrect check
value), Z_STREAM_ERROR if the stream structure was inconsistent (for example value, in which case strm->msg points to a string with a more specific
next_in or next_out was Z_NULL), Z_MEM_ERROR if there was not enough memory, error), Z_STREAM_ERROR if the stream structure was inconsistent (for example
Z_BUF_ERROR if no progress is possible or if there was not enough room in the next_in or next_out was Z_NULL, or the state was inadvertently written over
output buffer when Z_FINISH is used. Note that Z_BUF_ERROR is not fatal, and by the application), Z_MEM_ERROR if there was not enough memory, Z_BUF_ERROR
if no progress was possible or if there was not enough room in the output
buffer when Z_FINISH is used. Note that Z_BUF_ERROR is not fatal, and
inflate() can be called again with more input and more output space to inflate() can be called again with more input and more output space to
continue decompressing. If Z_DATA_ERROR is returned, the application may continue decompressing. If Z_DATA_ERROR is returned, the application may
then call inflateSync() to look for a good compression block if a partial then call inflateSync() to look for a good compression block if a partial
recovery of the data is desired. recovery of the data is to be attempted.
*/ */
@ -511,9 +523,8 @@ ZEXTERN int ZEXPORT inflateEnd OF((z_streamp strm));
This function discards any unprocessed input and does not flush any pending This function discards any unprocessed input and does not flush any pending
output. output.
inflateEnd returns Z_OK if success, Z_STREAM_ERROR if the stream state inflateEnd returns Z_OK if success, or Z_STREAM_ERROR if the stream state
was inconsistent. In the error case, msg may be set but then points to a was inconsistent.
static string (which must not be deallocated).
*/ */
@ -544,16 +555,29 @@ ZEXTERN int ZEXPORT deflateInit2 OF((z_streamp strm,
compression at the expense of memory usage. The default value is 15 if compression at the expense of memory usage. The default value is 15 if
deflateInit is used instead. deflateInit is used instead.
For the current implementation of deflate(), a windowBits value of 8 (a
window size of 256 bytes) is not supported. As a result, a request for 8
will result in 9 (a 512-byte window). In that case, providing 8 to
inflateInit2() will result in an error when the zlib header with 9 is
checked against the initialization of inflate(). The remedy is to not use 8
with deflateInit2() with this initialization, or at least in that case use 9
with inflateInit2().
windowBits can also be -8..-15 for raw deflate. In this case, -windowBits windowBits can also be -8..-15 for raw deflate. In this case, -windowBits
determines the window size. deflate() will then generate raw deflate data determines the window size. deflate() will then generate raw deflate data
with no zlib header or trailer, and will not compute an adler32 check value. with no zlib header or trailer, and will not compute a check value.
windowBits can also be greater than 15 for optional gzip encoding. Add windowBits can also be greater than 15 for optional gzip encoding. Add
16 to windowBits to write a simple gzip header and trailer around the 16 to windowBits to write a simple gzip header and trailer around the
compressed data instead of a zlib wrapper. The gzip header will have no compressed data instead of a zlib wrapper. The gzip header will have no
file name, no extra data, no comment, no modification time (set to zero), no file name, no extra data, no comment, no modification time (set to zero), no
header crc, and the operating system will be set to 255 (unknown). If a header crc, and the operating system will be set to the appropriate value,
gzip stream is being written, strm->adler is a crc32 instead of an adler32. if the operating system was determined at compile time. If a gzip stream is
being written, strm->adler is a CRC-32 instead of an Adler-32.
For raw deflate or gzip encoding, a request for a 256-byte window is
rejected as invalid, since only the zlib header provides a means of
transmitting the window size to the decompressor.
The memLevel parameter specifies how much memory should be allocated The memLevel parameter specifies how much memory should be allocated
for the internal compression state. memLevel=1 uses minimum memory but is for the internal compression state. memLevel=1 uses minimum memory but is
@ -614,12 +638,12 @@ ZEXTERN int ZEXPORT deflateSetDictionary OF((z_streamp strm,
addition, the current implementation of deflate will use at most the window addition, the current implementation of deflate will use at most the window
size minus 262 bytes of the provided dictionary. size minus 262 bytes of the provided dictionary.
Upon return of this function, strm->adler is set to the adler32 value Upon return of this function, strm->adler is set to the Adler-32 value
of the dictionary; the decompressor may later use this value to determine of the dictionary; the decompressor may later use this value to determine
which dictionary has been used by the compressor. (The adler32 value which dictionary has been used by the compressor. (The Adler-32 value
applies to the whole dictionary even if only a subset of the dictionary is applies to the whole dictionary even if only a subset of the dictionary is
actually used by the compressor.) If a raw deflate was requested, then the actually used by the compressor.) If a raw deflate was requested, then the
adler32 value is not computed and strm->adler is not set. Adler-32 value is not computed and strm->adler is not set.
deflateSetDictionary returns Z_OK if success, or Z_STREAM_ERROR if a 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 parameter is invalid (e.g. dictionary being Z_NULL) or the stream state is
@ -628,6 +652,28 @@ ZEXTERN int ZEXPORT deflateSetDictionary OF((z_streamp strm,
not perform any compression: this will be done by deflate(). not perform any compression: this will be done by deflate().
*/ */
ZEXTERN int ZEXPORT deflateGetDictionary OF((z_streamp strm,
Bytef *dictionary,
uInt *dictLength));
/*
Returns the sliding dictionary being maintained by deflate. dictLength is
set to the number of bytes in the dictionary, and that many bytes are copied
to dictionary. dictionary must have enough space, where 32768 bytes is
always enough. If deflateGetDictionary() is called with dictionary equal to
Z_NULL, then only the dictionary length is returned, and nothing is copied.
Similary, if dictLength is Z_NULL, then it is not set.
deflateGetDictionary() may return a length less than the window size, even
when more than the window size in input has been provided. It may return up
to 258 bytes less in that case, due to how zlib's implementation of deflate
manages the sliding window and lookahead for matches, where matches can be
up to 258 bytes long. If the application needs the last window-size bytes of
input, then that would need to be saved by the application outside of zlib.
deflateGetDictionary returns Z_OK on success, or Z_STREAM_ERROR if the
stream state is inconsistent.
*/
ZEXTERN int ZEXPORT deflateCopy OF((z_streamp dest, ZEXTERN int ZEXPORT deflateCopy OF((z_streamp dest,
z_streamp source)); z_streamp source));
/* /*
@ -648,10 +694,10 @@ ZEXTERN int ZEXPORT deflateCopy OF((z_streamp dest,
ZEXTERN int ZEXPORT deflateReset OF((z_streamp strm)); ZEXTERN int ZEXPORT deflateReset OF((z_streamp strm));
/* /*
This function is equivalent to deflateEnd followed by deflateInit, This function is equivalent to deflateEnd followed by deflateInit, but
but does not free and reallocate all the internal compression state. The does not free and reallocate the internal compression state. The stream
stream will keep the same compression level and any other attributes that will leave the compression level and any other attributes that may have been
may have been set by deflateInit2. set unchanged.
deflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source deflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source
stream state was inconsistent (such as zalloc or state being Z_NULL). stream state was inconsistent (such as zalloc or state being Z_NULL).
@ -662,20 +708,36 @@ ZEXTERN int ZEXPORT deflateParams OF((z_streamp strm,
int strategy)); int strategy));
/* /*
Dynamically update the compression level and compression strategy. The Dynamically update the compression level and compression strategy. The
interpretation of level and strategy is as in deflateInit2. This can be interpretation of level and strategy is as in deflateInit2(). This can be
used to switch between compression and straight copy of the input data, or used to switch between compression and straight copy of the input data, or
to switch to a different kind of input data requiring a different strategy. to switch to a different kind of input data requiring a different strategy.
If the compression level is changed, the input available so far is If the compression approach (which is a function of the level) or the
compressed with the old level (and may be flushed); the new level will take strategy is changed, and if any input has been consumed in a previous
effect only at the next call of deflate(). deflate() call, then the input available so far is compressed with the old
level and strategy using deflate(strm, Z_BLOCK). There are three approaches
for the compression levels 0, 1..3, and 4..9 respectively. The new level
and strategy will take effect at the next call of deflate().
Before the call of deflateParams, the stream state must be set as for If a deflate(strm, Z_BLOCK) is performed by deflateParams(), and it does
a call of deflate(), since the currently available input may have to be not have enough output space to complete, then the parameter change will not
compressed and flushed. In particular, strm->avail_out must be non-zero. take effect. In this case, deflateParams() can be called again with the
same parameters and more output space to try again.
deflateParams returns Z_OK if success, Z_STREAM_ERROR if the source In order to assure a change in the parameters on the first try, the
stream state was inconsistent or if a parameter was invalid, Z_BUF_ERROR if deflate stream should be flushed using deflate() with Z_BLOCK or other flush
strm->avail_out was zero. request until strm.avail_out is not zero, before calling deflateParams().
Then no more input data should be provided before the deflateParams() call.
If this is done, the old level and strategy will be applied to the data
compressed before deflateParams(), and the new level and strategy will be
applied to the the data compressed after deflateParams().
deflateParams returns Z_OK on success, Z_STREAM_ERROR if the source stream
state was inconsistent or if a parameter was invalid, or Z_BUF_ERROR if
there was not enough output space to complete the compression of the
available input data before a change in the strategy or approach. Note that
in the case of a Z_BUF_ERROR, the parameters are not changed. A return
value of Z_BUF_ERROR is not fatal, in which case deflateParams() can be
retried with more output space.
*/ */
ZEXTERN int ZEXPORT deflateTune OF((z_streamp strm, ZEXTERN int ZEXPORT deflateTune OF((z_streamp strm,
@ -793,7 +855,7 @@ ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm,
is for use with other formats that use the deflate compressed data format is for use with other formats that use the deflate compressed data format
such as zip. Those formats provide their own check values. If a custom such as zip. Those formats provide their own check values. If a custom
format is developed using the raw deflate format for compressed data, it is format is developed using the raw deflate format for compressed data, it is
recommended that a check value such as an adler32 or a crc32 be applied to recommended that a check value such as an Adler-32 or a CRC-32 be applied to
the uncompressed data as is done in the zlib, gzip, and zip formats. For the uncompressed data as is done in the zlib, gzip, and zip formats. For
most applications, the zlib format should be used as is. Note that comments most applications, the zlib format should be used as is. Note that comments
above on the use in deflateInit2() applies to the magnitude of windowBits. above on the use in deflateInit2() applies to the magnitude of windowBits.
@ -802,7 +864,10 @@ ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm,
32 to windowBits to enable zlib and gzip decoding with automatic header 32 to windowBits to enable zlib and gzip decoding with automatic header
detection, or add 16 to decode only the gzip format (the zlib format will detection, or add 16 to decode only the gzip format (the zlib format will
return a Z_DATA_ERROR). If a gzip stream is being decoded, strm->adler is a return a Z_DATA_ERROR). If a gzip stream is being decoded, strm->adler is a
crc32 instead of an adler32. CRC-32 instead of an Adler-32. Unlike the gunzip utility and gzread() (see
below), inflate() will not automatically decode concatenated gzip streams.
inflate() will return Z_STREAM_END at the end of the gzip stream. The state
would need to be reset to continue decoding a subsequent gzip stream.
inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
memory, Z_VERSION_ERROR if the zlib library version is incompatible with the memory, Z_VERSION_ERROR if the zlib library version is incompatible with the
@ -823,7 +888,7 @@ ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp strm,
Initializes the decompression dictionary from the given uncompressed byte Initializes the decompression dictionary from the given uncompressed byte
sequence. This function must be called immediately after a call of inflate, sequence. This function must be called immediately after a call of inflate,
if that call returned Z_NEED_DICT. The dictionary chosen by the compressor if that call returned Z_NEED_DICT. The dictionary chosen by the compressor
can be determined from the adler32 value returned by that call of inflate. can be determined from the Adler-32 value returned by that call of inflate.
The compressor and decompressor must use exactly the same dictionary (see The compressor and decompressor must use exactly the same dictionary (see
deflateSetDictionary). For raw inflate, this function can be called at any deflateSetDictionary). For raw inflate, this function can be called at any
time to set the dictionary. If the provided dictionary is smaller than the time to set the dictionary. If the provided dictionary is smaller than the
@ -834,7 +899,7 @@ ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp strm,
inflateSetDictionary returns Z_OK if success, Z_STREAM_ERROR if a 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 parameter is invalid (e.g. dictionary being Z_NULL) or the stream state is
inconsistent, Z_DATA_ERROR if the given dictionary doesn't match the inconsistent, Z_DATA_ERROR if the given dictionary doesn't match the
expected one (incorrect adler32 value). inflateSetDictionary does not expected one (incorrect Adler-32 value). inflateSetDictionary does not
perform any decompression: this will be done by subsequent calls of perform any decompression: this will be done by subsequent calls of
inflate(). inflate().
*/ */
@ -892,7 +957,7 @@ ZEXTERN int ZEXPORT inflateCopy OF((z_streamp dest,
ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm)); ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm));
/* /*
This function is equivalent to inflateEnd followed by inflateInit, This function is equivalent to inflateEnd followed by inflateInit,
but does not free and reallocate all the internal decompression state. The but does not free and reallocate the internal decompression state. The
stream will keep attributes that may have been set by inflateInit2. stream will keep attributes that may have been set by inflateInit2.
inflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source inflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source
@ -904,7 +969,9 @@ ZEXTERN int ZEXPORT inflateReset2 OF((z_streamp strm,
/* /*
This function is the same as inflateReset, but it also permits changing This function is the same as inflateReset, but it also permits changing
the wrap and window size requests. The windowBits parameter is interpreted the wrap and window size requests. The windowBits parameter is interpreted
the same as it is for inflateInit2. the same as it is for inflateInit2. If the window size is changed, then the
memory allocated for the window is freed, and the window will be reallocated
by inflate() if needed.
inflateReset2 returns Z_OK if success, or Z_STREAM_ERROR if the source inflateReset2 returns Z_OK if success, or Z_STREAM_ERROR if the source
stream state was inconsistent (such as zalloc or state being Z_NULL), or if stream state was inconsistent (such as zalloc or state being Z_NULL), or if
@ -956,7 +1023,7 @@ ZEXTERN long ZEXPORT inflateMark OF((z_streamp strm));
location in the input stream can be determined from avail_in and data_type location in the input stream can be determined from avail_in and data_type
as noted in the description for the Z_BLOCK flush parameter for inflate. as noted in the description for the Z_BLOCK flush parameter for inflate.
inflateMark returns the value noted above or -1 << 16 if the provided inflateMark returns the value noted above, or -65536 if the provided
source stream state was inconsistent. source stream state was inconsistent.
*/ */
@ -1048,9 +1115,9 @@ ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm,
This routine would normally be used in a utility that reads zip or gzip This routine would normally be used in a utility that reads zip or gzip
files and writes out uncompressed files. The utility would decode the files and writes out uncompressed files. The utility would decode the
header and process the trailer on its own, hence this routine expects only header and process the trailer on its own, hence this routine expects only
the raw deflate stream to decompress. This is different from the normal the raw deflate stream to decompress. This is different from the default
behavior of inflate(), which expects either a zlib or gzip header and behavior of inflate(), which expects a zlib header and trailer around the
trailer around the deflate stream. deflate stream.
inflateBack() uses two subroutines supplied by the caller that are then inflateBack() uses two subroutines supplied by the caller that are then
called by inflateBack() for input and output. inflateBack() calls those called by inflateBack() for input and output. inflateBack() calls those
@ -1059,12 +1126,12 @@ ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm,
parameters and return types are defined above in the in_func and out_func parameters and return types are defined above in the in_func and out_func
typedefs. inflateBack() will call in(in_desc, &buf) which should return the typedefs. inflateBack() will call in(in_desc, &buf) which should return the
number of bytes of provided input, and a pointer to that input in buf. If number of bytes of provided input, and a pointer to that input in buf. If
there is no input available, in() must return zero--buf is ignored in that there is no input available, in() must return zero -- buf is ignored in that
case--and inflateBack() will return a buffer error. inflateBack() will call case -- and inflateBack() will return a buffer error. inflateBack() will
out(out_desc, buf, len) to write the uncompressed data buf[0..len-1]. out() call out(out_desc, buf, len) to write the uncompressed data buf[0..len-1].
should return zero on success, or non-zero on failure. If out() returns out() should return zero on success, or non-zero on failure. If out()
non-zero, inflateBack() will return with an error. Neither in() nor out() returns non-zero, inflateBack() will return with an error. Neither in() nor
are permitted to change the contents of the window provided to out() are permitted to change the contents of the window provided to
inflateBackInit(), which is also the buffer that out() uses to write from. inflateBackInit(), which is also the buffer that out() uses to write from.
The length written by out() will be at most the window size. Any non-zero The length written by out() will be at most the window size. Any non-zero
amount of input may be provided by in(). amount of input may be provided by in().
@ -1092,7 +1159,7 @@ ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm,
using strm->next_in which will be Z_NULL only if in() returned an error. If using strm->next_in which will be Z_NULL only if in() returned an error. If
strm->next_in is not Z_NULL, then the Z_BUF_ERROR was due to out() returning strm->next_in is not Z_NULL, then the Z_BUF_ERROR was due to out() returning
non-zero. (in() will always be called before out(), so strm->next_in is non-zero. (in() will always be called before out(), so strm->next_in is
assured to be defined if out() returns non-zero.) Note that inflateBack() assured to be defined if out() returns non-zero.) Note that inflateBack()
cannot return Z_OK. cannot return Z_OK.
*/ */
@ -1114,7 +1181,7 @@ ZEXTERN uLong ZEXPORT zlibCompileFlags OF((void));
7.6: size of z_off_t 7.6: size of z_off_t
Compiler, assembler, and debug options: Compiler, assembler, and debug options:
8: DEBUG 8: ZLIB_DEBUG
9: ASMV or ASMINF -- use ASM code 9: ASMV or ASMINF -- use ASM code
10: ZLIB_WINAPI -- exported functions use the WINAPI calling convention 10: ZLIB_WINAPI -- exported functions use the WINAPI calling convention
11: 0 (reserved) 11: 0 (reserved)
@ -1164,7 +1231,8 @@ ZEXTERN int ZEXPORT compress OF((Bytef *dest, uLongf *destLen,
the byte length of the source buffer. Upon entry, destLen is the total size the byte length of the source buffer. Upon entry, destLen is the total size
of the destination buffer, which must be at least the value returned by of the destination buffer, which must be at least the value returned by
compressBound(sourceLen). Upon exit, destLen is the actual size of the compressBound(sourceLen). Upon exit, destLen is the actual size of the
compressed buffer. compressed data. compress() is equivalent to compress2() with a level
parameter of Z_DEFAULT_COMPRESSION.
compress returns Z_OK if success, Z_MEM_ERROR if there was not compress returns Z_OK if success, Z_MEM_ERROR if there was not
enough memory, Z_BUF_ERROR if there was not enough room in the output enough memory, Z_BUF_ERROR if there was not enough room in the output
@ -1180,7 +1248,7 @@ ZEXTERN int ZEXPORT compress2 OF((Bytef *dest, uLongf *destLen,
length of the source buffer. Upon entry, destLen is the total size of the length of the source buffer. Upon entry, destLen is the total size of the
destination buffer, which must be at least the value returned by destination buffer, which must be at least the value returned by
compressBound(sourceLen). Upon exit, destLen is the actual size of the compressBound(sourceLen). Upon exit, destLen is the actual size of the
compressed buffer. compressed data.
compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
memory, Z_BUF_ERROR if there was not enough room in the output buffer, memory, Z_BUF_ERROR if there was not enough room in the output buffer,
@ -1203,7 +1271,7 @@ ZEXTERN int ZEXPORT uncompress OF((Bytef *dest, uLongf *destLen,
uncompressed data. (The size of the uncompressed data must have been saved uncompressed data. (The size of the uncompressed data must have been saved
previously by the compressor and transmitted to the decompressor by some previously by the compressor and transmitted to the decompressor by some
mechanism outside the scope of this compression library.) Upon exit, destLen mechanism outside the scope of this compression library.) Upon exit, destLen
is the actual size of the uncompressed buffer. is the actual size of the uncompressed data.
uncompress returns Z_OK if success, Z_MEM_ERROR if there was not 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 enough memory, Z_BUF_ERROR if there was not enough room in the output
@ -1212,6 +1280,14 @@ ZEXTERN int ZEXPORT uncompress OF((Bytef *dest, uLongf *destLen,
buffer with the uncompressed data up to that point. buffer with the uncompressed data up to that point.
*/ */
ZEXTERN int ZEXPORT uncompress2 OF((Bytef *dest, uLongf *destLen,
const Bytef *source, uLong *sourceLen));
/*
Same as uncompress, except that sourceLen is a pointer, where the
length of the source is *sourceLen. On return, *sourceLen is the number of
source bytes consumed.
*/
/* gzip file access functions */ /* gzip file access functions */
/* /*
@ -1290,10 +1366,9 @@ ZEXTERN int ZEXPORT gzbuffer OF((gzFile file, unsigned size));
default buffer size is 8192 bytes. This function must be called after default buffer size is 8192 bytes. This function must be called after
gzopen() or gzdopen(), and before any other calls that read or write the gzopen() or gzdopen(), and before any other calls that read or write the
file. The buffer memory allocation is always deferred to the first read or file. The buffer memory allocation is always deferred to the first read or
write. Two buffers are allocated, either both of the specified size when write. Three times that size in buffer space is allocated. A larger buffer
writing, or one of the specified size and the other twice that size when size of, for example, 64K or 128K bytes will noticeably increase the speed
reading. A larger buffer size of, for example, 64K or 128K bytes will of decompression (reading).
noticeably increase the speed of decompression (reading).
The new buffer size also affects the maximum length for gzprintf(). The new buffer size also affects the maximum length for gzprintf().
@ -1304,10 +1379,12 @@ ZEXTERN int ZEXPORT gzbuffer OF((gzFile file, unsigned size));
ZEXTERN int ZEXPORT gzsetparams OF((gzFile file, int level, int strategy)); ZEXTERN int ZEXPORT gzsetparams OF((gzFile file, int level, int strategy));
/* /*
Dynamically update the compression level or strategy. See the description Dynamically update the compression level or strategy. See the description
of deflateInit2 for the meaning of these parameters. of deflateInit2 for the meaning of these parameters. Previously provided
data is flushed before the parameter change.
gzsetparams returns Z_OK if success, or Z_STREAM_ERROR if the file was not gzsetparams returns Z_OK if success, Z_STREAM_ERROR if the file was not
opened for writing. opened for writing, Z_ERRNO if there is an error writing the flushed data,
or Z_MEM_ERROR if there is a memory allocation error.
*/ */
ZEXTERN int ZEXPORT gzread OF((gzFile file, voidp buf, unsigned len)); ZEXTERN int ZEXPORT gzread OF((gzFile file, voidp buf, unsigned len));
@ -1335,7 +1412,35 @@ ZEXTERN int ZEXPORT gzread OF((gzFile file, voidp buf, unsigned len));
case. case.
gzread returns the number of uncompressed bytes actually read, less than gzread returns the number of uncompressed bytes actually read, less than
len for end of file, or -1 for error. len for end of file, or -1 for error. If len is too large to fit in an int,
then nothing is read, -1 is returned, and the error state is set to
Z_STREAM_ERROR.
*/
ZEXTERN z_size_t ZEXPORT gzfread OF((voidp buf, z_size_t size, z_size_t nitems,
gzFile file));
/*
Read up to nitems items of size size from file to buf, otherwise operating
as gzread() does. This duplicates the interface of stdio's fread(), with
size_t request and return types. If the library defines size_t, then
z_size_t is identical to size_t. If not, then z_size_t is an unsigned
integer type that can contain a pointer.
gzfread() returns the number of full items read of size size, or zero if
the end of the file was reached and a full item could not be read, or if
there was an error. gzerror() must be consulted if zero is returned in
order to determine if there was an error. If the multiplication of size and
nitems overflows, i.e. the product does not fit in a z_size_t, then nothing
is read, zero is returned, and the error state is set to Z_STREAM_ERROR.
In the event that the end of file is reached and only a partial item is
available at the end, i.e. the remaining uncompressed data length is not a
multiple of size, then the final partial item is nevetheless read into buf
and the end-of-file flag is set. The length of the partial item read is not
provided, but could be inferred from the result of gztell(). This behavior
is the same as the behavior of fread() implementations in common libraries,
but it prevents the direct use of gzfread() to read a concurrently written
file, reseting and retrying on end-of-file, when size is not 1.
*/ */
ZEXTERN int ZEXPORT gzwrite OF((gzFile file, ZEXTERN int ZEXPORT gzwrite OF((gzFile file,
@ -1346,19 +1451,33 @@ ZEXTERN int ZEXPORT gzwrite OF((gzFile file,
error. error.
*/ */
ZEXTERN z_size_t ZEXPORT gzfwrite OF((voidpc buf, z_size_t size,
z_size_t nitems, gzFile file));
/*
gzfwrite() writes nitems items of size size from buf to file, duplicating
the interface of stdio's fwrite(), with size_t request and return types. If
the library defines size_t, then z_size_t is identical to size_t. If not,
then z_size_t is an unsigned integer type that can contain a pointer.
gzfwrite() returns the number of full items written of size size, or zero
if there was an error. If the multiplication of size and nitems overflows,
i.e. the product does not fit in a z_size_t, then nothing is written, zero
is returned, and the error state is set to Z_STREAM_ERROR.
*/
ZEXTERN int ZEXPORTVA gzprintf Z_ARG((gzFile file, const char *format, ...)); ZEXTERN int ZEXPORTVA gzprintf Z_ARG((gzFile file, const char *format, ...));
/* /*
Converts, formats, and writes the arguments to the compressed file under Converts, formats, and writes the arguments to the compressed file under
control of the format string, as in fprintf. gzprintf returns the number of control of the format string, as in fprintf. gzprintf returns the number of
uncompressed bytes actually written, or 0 in case of error. The number of uncompressed bytes actually written, or a negative zlib error code in case
uncompressed bytes written is limited to 8191, or one less than the buffer of error. The number of uncompressed bytes written is limited to 8191, or
size given to gzbuffer(). The caller should assure that this limit is not one less than the buffer size given to gzbuffer(). The caller should assure
exceeded. If it is exceeded, then gzprintf() will return an error (0) with that this limit is not exceeded. If it is exceeded, then gzprintf() will
nothing written. In this case, there may also be a buffer overflow with return an error (0) with nothing written. In this case, there may also be a
unpredictable consequences, which is possible only if zlib was compiled with buffer overflow with unpredictable consequences, which is possible only if
the insecure functions sprintf() or vsprintf() because the secure snprintf() zlib was compiled with the insecure functions sprintf() or vsprintf()
or vsnprintf() functions were not available. This can be determined using because the secure snprintf() or vsnprintf() functions were not available.
zlibCompileFlags(). This can be determined using zlibCompileFlags().
*/ */
ZEXTERN int ZEXPORT gzputs OF((gzFile file, const char *s)); ZEXTERN int ZEXPORT gzputs OF((gzFile file, const char *s));
@ -1418,7 +1537,7 @@ ZEXTERN int ZEXPORT gzflush OF((gzFile file, int flush));
If the flush parameter is Z_FINISH, the remaining data is written and the If the flush parameter is Z_FINISH, the remaining data is written and the
gzip stream is completed in the output. If gzwrite() is called again, a new gzip stream is completed in the output. If gzwrite() is called again, a new
gzip stream will be started in the output. gzread() is able to read such gzip stream will be started in the output. gzread() is able to read such
concatented gzip streams. concatenated gzip streams.
gzflush should be called only when strictly necessary because it will gzflush should be called only when strictly necessary because it will
degrade compression if called too often. degrade compression if called too often.
@ -1572,7 +1691,7 @@ ZEXTERN uLong ZEXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len));
return the updated checksum. If buf is Z_NULL, this function returns the return the updated checksum. If buf is Z_NULL, this function returns the
required initial value for the checksum. required initial value for the checksum.
An Adler-32 checksum is almost as reliable as a CRC32 but can be computed An Adler-32 checksum is almost as reliable as a CRC-32 but can be computed
much faster. much faster.
Usage example: Usage example:
@ -1585,6 +1704,12 @@ ZEXTERN uLong ZEXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len));
if (adler != original_adler) error(); if (adler != original_adler) error();
*/ */
ZEXTERN uLong ZEXPORT adler32_z OF((uLong adler, const Bytef *buf,
z_size_t len));
/*
Same as adler32(), but with a size_t length.
*/
/* /*
ZEXTERN uLong ZEXPORT adler32_combine OF((uLong adler1, uLong adler2, ZEXTERN uLong ZEXPORT adler32_combine OF((uLong adler1, uLong adler2,
z_off_t len2)); z_off_t len2));
@ -1614,6 +1739,12 @@ ZEXTERN uLong ZEXPORT crc32 OF((uLong crc, const Bytef *buf, uInt len));
if (crc != original_crc) error(); if (crc != original_crc) error();
*/ */
ZEXTERN uLong ZEXPORT crc32_z OF((uLong adler, const Bytef *buf,
z_size_t len));
/*
Same as crc32(), but with a size_t length.
*/
/* /*
ZEXTERN uLong ZEXPORT crc32_combine OF((uLong crc1, uLong crc2, z_off_t len2)); ZEXTERN uLong ZEXPORT crc32_combine OF((uLong crc1, uLong crc2, z_off_t len2));
@ -1644,19 +1775,35 @@ ZEXTERN int ZEXPORT inflateBackInit_ OF((z_streamp strm, int windowBits,
unsigned char FAR *window, unsigned char FAR *window,
const char *version, const char *version,
int stream_size)); int stream_size));
#define deflateInit(strm, level) \ #ifdef Z_PREFIX_SET
deflateInit_((strm), (level), ZLIB_VERSION, (int)sizeof(z_stream)) # define z_deflateInit(strm, level) \
#define inflateInit(strm) \ deflateInit_((strm), (level), ZLIB_VERSION, (int)sizeof(z_stream))
inflateInit_((strm), ZLIB_VERSION, (int)sizeof(z_stream)) # define z_inflateInit(strm) \
#define deflateInit2(strm, level, method, windowBits, memLevel, strategy) \ inflateInit_((strm), ZLIB_VERSION, (int)sizeof(z_stream))
deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\ # define z_deflateInit2(strm, level, method, windowBits, memLevel, strategy) \
(strategy), ZLIB_VERSION, (int)sizeof(z_stream)) deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\
#define inflateInit2(strm, windowBits) \ (strategy), ZLIB_VERSION, (int)sizeof(z_stream))
inflateInit2_((strm), (windowBits), ZLIB_VERSION, \ # define z_inflateInit2(strm, windowBits) \
(int)sizeof(z_stream)) inflateInit2_((strm), (windowBits), ZLIB_VERSION, \
#define inflateBackInit(strm, windowBits, window) \ (int)sizeof(z_stream))
inflateBackInit_((strm), (windowBits), (window), \ # define z_inflateBackInit(strm, windowBits, window) \
ZLIB_VERSION, (int)sizeof(z_stream)) inflateBackInit_((strm), (windowBits), (window), \
ZLIB_VERSION, (int)sizeof(z_stream))
#else
# define deflateInit(strm, level) \
deflateInit_((strm), (level), ZLIB_VERSION, (int)sizeof(z_stream))
# define inflateInit(strm) \
inflateInit_((strm), ZLIB_VERSION, (int)sizeof(z_stream))
# define deflateInit2(strm, level, method, windowBits, memLevel, strategy) \
deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\
(strategy), ZLIB_VERSION, (int)sizeof(z_stream))
# define inflateInit2(strm, windowBits) \
inflateInit2_((strm), (windowBits), ZLIB_VERSION, \
(int)sizeof(z_stream))
# define inflateBackInit(strm, windowBits, window) \
inflateBackInit_((strm), (windowBits), (window), \
ZLIB_VERSION, (int)sizeof(z_stream))
#endif
#ifndef Z_SOLO #ifndef Z_SOLO
@ -1676,10 +1823,10 @@ ZEXTERN int ZEXPORT gzgetc_ OF((gzFile file)); /* backward compatibility */
#ifdef Z_PREFIX_SET #ifdef Z_PREFIX_SET
# undef z_gzgetc # undef z_gzgetc
# define z_gzgetc(g) \ # define z_gzgetc(g) \
((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) : gzgetc(g)) ((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) : (gzgetc)(g))
#else #else
# define gzgetc(g) \ # define gzgetc(g) \
((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) : gzgetc(g)) ((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) : (gzgetc)(g))
#endif #endif
/* provide 64-bit offset functions if _LARGEFILE64_SOURCE defined, and/or /* provide 64-bit offset functions if _LARGEFILE64_SOURCE defined, and/or
@ -1737,19 +1884,16 @@ ZEXTERN int ZEXPORT gzgetc_ OF((gzFile file)); /* backward compatibility */
#endif /* !Z_SOLO */ #endif /* !Z_SOLO */
/* hack for buggy compilers */
#if !defined(ZUTIL_H) && !defined(NO_DUMMY_DECL)
struct internal_state {int dummy;};
#endif
/* undocumented functions */ /* undocumented functions */
ZEXTERN const char * ZEXPORT zError OF((int)); ZEXTERN const char * ZEXPORT zError OF((int));
ZEXTERN int ZEXPORT inflateSyncPoint OF((z_streamp)); ZEXTERN int ZEXPORT inflateSyncPoint OF((z_streamp));
ZEXTERN const z_crc_t FAR * ZEXPORT get_crc_table OF((void)); ZEXTERN const z_crc_t FAR * ZEXPORT get_crc_table OF((void));
ZEXTERN int ZEXPORT inflateUndermine OF((z_streamp, int)); ZEXTERN int ZEXPORT inflateUndermine OF((z_streamp, int));
ZEXTERN int ZEXPORT inflateValidate OF((z_streamp, int));
ZEXTERN unsigned long ZEXPORT inflateCodesUsed OF ((z_streamp));
ZEXTERN int ZEXPORT inflateResetKeep OF((z_streamp)); ZEXTERN int ZEXPORT inflateResetKeep OF((z_streamp));
ZEXTERN int ZEXPORT deflateResetKeep OF((z_streamp)); ZEXTERN int ZEXPORT deflateResetKeep OF((z_streamp));
#if defined(_WIN32) && !defined(Z_SOLO) #if (defined(_WIN32) || defined(__CYGWIN__)) && !defined(Z_SOLO)
ZEXTERN gzFile ZEXPORT gzopen_w OF((const wchar_t *path, ZEXTERN gzFile ZEXPORT gzopen_w OF((const wchar_t *path,
const char *mode)); const char *mode));
#endif #endif

19
Foundation/src/adler32.c
View File

@ -1,5 +1,5 @@
/* adler32.c -- compute the Adler-32 checksum of a data stream /* adler32.c -- compute the Adler-32 checksum of a data stream
* Copyright (C) 1995-2011 Mark Adler * Copyright (C) 1995-2011, 2016 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h * For conditions of distribution and use, see copyright notice in zlib.h
*/ */
@ -11,7 +11,7 @@
local uLong adler32_combine_ OF((uLong adler1, uLong adler2, z_off64_t len2)); local uLong adler32_combine_ OF((uLong adler1, uLong adler2, z_off64_t len2));
#define BASE 65521 /* largest prime smaller than 65536 */ #define BASE 65521U /* largest prime smaller than 65536 */
#define NMAX 5552 #define NMAX 5552
/* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */ /* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
@ -62,10 +62,10 @@ local uLong adler32_combine_ OF((uLong adler1, uLong adler2, z_off64_t len2));
#endif #endif
/* ========================================================================= */ /* ========================================================================= */
uLong ZEXPORT adler32(adler, buf, len) uLong ZEXPORT adler32_z(adler, buf, len)
uLong adler; uLong adler;
const Bytef *buf; const Bytef *buf;
uInt len; z_size_t len;
{ {
unsigned long sum2; unsigned long sum2;
unsigned n; unsigned n;
@ -132,6 +132,15 @@ uLong ZEXPORT adler32(adler, buf, len)
return adler | (sum2 << 16); return adler | (sum2 << 16);
} }
/* ========================================================================= */
uLong ZEXPORT adler32(adler, buf, len)
uLong adler;
const Bytef *buf;
uInt len;
{
return adler32_z(adler, buf, len);
}
/* ========================================================================= */ /* ========================================================================= */
local uLong adler32_combine_(adler1, adler2, len2) local uLong adler32_combine_(adler1, adler2, len2)
uLong adler1; uLong adler1;
@ -156,7 +165,7 @@ local uLong adler32_combine_(adler1, adler2, len2)
sum2 += ((adler1 >> 16) & 0xffff) + ((adler2 >> 16) & 0xffff) + BASE - rem; sum2 += ((adler1 >> 16) & 0xffff) + ((adler2 >> 16) & 0xffff) + BASE - rem;
if (sum1 >= BASE) sum1 -= BASE; if (sum1 >= BASE) sum1 -= BASE;
if (sum1 >= BASE) sum1 -= BASE; if (sum1 >= BASE) sum1 -= BASE;
if (sum2 >= (BASE << 1)) sum2 -= (BASE << 1); if (sum2 >= ((unsigned long)BASE << 1)) sum2 -= ((unsigned long)BASE << 1);
if (sum2 >= BASE) sum2 -= BASE; if (sum2 >= BASE) sum2 -= BASE;
return sum1 | (sum2 << 16); return sum1 | (sum2 << 16);
} }

42
Foundation/src/compress.c
View File

@ -1,5 +1,5 @@
/* compress.c -- compress a memory buffer /* compress.c -- compress a memory buffer
* Copyright (C) 1995-2005 Jean-loup Gailly. * Copyright (C) 1995-2005, 2014, 2016 Jean-loup Gailly, Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h * For conditions of distribution and use, see copyright notice in zlib.h
*/ */
@ -28,16 +28,11 @@ int ZEXPORT compress2 (dest, destLen, source, sourceLen, level)
{ {
z_stream stream; z_stream stream;
int err; int err;
const uInt max = (uInt)-1;
uLong left;
stream.next_in = (z_const Bytef *)source; left = *destLen;
stream.avail_in = (uInt)sourceLen; *destLen = 0;
#ifdef MAXSEG_64K
/* Check for source > 64K on 16-bit machine: */
if ((uLong)stream.avail_in != sourceLen) return Z_BUF_ERROR;
#endif
stream.next_out = dest;
stream.avail_out = (uInt)*destLen;
if ((uLong)stream.avail_out != *destLen) return Z_BUF_ERROR;
stream.zalloc = (alloc_func)0; stream.zalloc = (alloc_func)0;
stream.zfree = (free_func)0; stream.zfree = (free_func)0;
@ -46,15 +41,26 @@ int ZEXPORT compress2 (dest, destLen, source, sourceLen, level)
err = deflateInit(&stream, level); err = deflateInit(&stream, level);
if (err != Z_OK) return err; if (err != Z_OK) return err;
err = deflate(&stream, Z_FINISH); stream.next_out = dest;
if (err != Z_STREAM_END) { stream.avail_out = 0;
deflateEnd(&stream); stream.next_in = (z_const Bytef *)source;
return err == Z_OK ? Z_BUF_ERROR : err; stream.avail_in = 0;
}
*destLen = stream.total_out;
err = deflateEnd(&stream); do {
return err; if (stream.avail_out == 0) {
stream.avail_out = left > (uLong)max ? max : (uInt)left;
left -= stream.avail_out;
}
if (stream.avail_in == 0) {
stream.avail_in = sourceLen > (uLong)max ? max : (uInt)sourceLen;
sourceLen -= stream.avail_in;
}
err = deflate(&stream, sourceLen ? Z_NO_FLUSH : Z_FINISH);
} while (err == Z_OK);
*destLen = stream.total_out;
deflateEnd(&stream);
return err == Z_STREAM_END ? Z_OK : err;
} }
/* =========================================================================== /* ===========================================================================

37
Foundation/src/crc32.c
View File

@ -38,9 +38,9 @@
#endif #endif
#ifdef BYFOUR #ifdef BYFOUR
local unsigned long crc32_little OF((unsigned long, local unsigned long crc32_little OF((unsigned long,
const unsigned char FAR *, unsigned)); const unsigned char FAR *, z_size_t));
local unsigned long crc32_big OF((unsigned long, local unsigned long crc32_big OF((unsigned long,
const unsigned char FAR *, unsigned)); const unsigned char FAR *, z_size_t));
# define TBLS 8 # define TBLS 8
#else #else
# define TBLS 1 # define TBLS 1
@ -201,10 +201,10 @@ const z_crc_t FAR * ZEXPORT get_crc_table()
#define DO8 DO1; DO1; DO1; DO1; DO1; DO1; DO1; DO1 #define DO8 DO1; DO1; DO1; DO1; DO1; DO1; DO1; DO1
/* ========================================================================= */ /* ========================================================================= */
unsigned long ZEXPORT crc32(crc, buf, len) unsigned long ZEXPORT crc32_z(crc, buf, len)
unsigned long crc; unsigned long crc;
const unsigned char FAR *buf; const unsigned char FAR *buf;
uInt len; z_size_t len;
{ {
if (buf == Z_NULL) return 0UL; if (buf == Z_NULL) return 0UL;
@ -235,8 +235,29 @@ unsigned long ZEXPORT crc32(crc, buf, len)
return crc ^ 0xffffffffUL; return crc ^ 0xffffffffUL;
} }
/* ========================================================================= */
unsigned long ZEXPORT crc32(crc, buf, len)
unsigned long crc;
const unsigned char FAR *buf;
uInt len;
{
return crc32_z(crc, buf, len);
}
#ifdef BYFOUR #ifdef BYFOUR
/*
This BYFOUR code accesses the passed unsigned char * buffer with a 32-bit
integer pointer type. This violates the strict aliasing rule, where a
compiler can assume, for optimization purposes, that two pointers to
fundamentally different types won't ever point to the same memory. This can
manifest as a problem only if one of the pointers is written to. This code
only reads from those pointers. So long as this code remains isolated in
this compilation unit, there won't be a problem. For this reason, this code
should not be copied and pasted into a compilation unit in which other code
writes to the buffer that is passed to these routines.
*/
/* ========================================================================= */ /* ========================================================================= */
#define DOLIT4 c ^= *buf4++; \ #define DOLIT4 c ^= *buf4++; \
c = crc_table[3][c & 0xff] ^ crc_table[2][(c >> 8) & 0xff] ^ \ c = crc_table[3][c & 0xff] ^ crc_table[2][(c >> 8) & 0xff] ^ \
@ -247,7 +268,7 @@ unsigned long ZEXPORT crc32(crc, buf, len)
local unsigned long crc32_little(crc, buf, len) local unsigned long crc32_little(crc, buf, len)
unsigned long crc; unsigned long crc;
const unsigned char FAR *buf; const unsigned char FAR *buf;
unsigned len; z_size_t len;
{ {
register z_crc_t c; register z_crc_t c;
register const z_crc_t FAR *buf4; register const z_crc_t FAR *buf4;
@ -278,7 +299,7 @@ local unsigned long crc32_little(crc, buf, len)
} }
/* ========================================================================= */ /* ========================================================================= */
#define DOBIG4 c ^= *++buf4; \ #define DOBIG4 c ^= *buf4++; \
c = crc_table[4][c & 0xff] ^ crc_table[5][(c >> 8) & 0xff] ^ \ c = crc_table[4][c & 0xff] ^ crc_table[5][(c >> 8) & 0xff] ^ \
crc_table[6][(c >> 16) & 0xff] ^ crc_table[7][c >> 24] crc_table[6][(c >> 16) & 0xff] ^ crc_table[7][c >> 24]
#define DOBIG32 DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4 #define DOBIG32 DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4; DOBIG4
@ -287,7 +308,7 @@ local unsigned long crc32_little(crc, buf, len)
local unsigned long crc32_big(crc, buf, len) local unsigned long crc32_big(crc, buf, len)
unsigned long crc; unsigned long crc;
const unsigned char FAR *buf; const unsigned char FAR *buf;
unsigned len; z_size_t len;
{ {
register z_crc_t c; register z_crc_t c;
register const z_crc_t FAR *buf4; register const z_crc_t FAR *buf4;
@ -300,7 +321,6 @@ local unsigned long crc32_big(crc, buf, len)
} }
buf4 = (const z_crc_t FAR *)(const void FAR *)buf; buf4 = (const z_crc_t FAR *)(const void FAR *)buf;
buf4--;
while (len >= 32) { while (len >= 32) {
DOBIG32; DOBIG32;
len -= 32; len -= 32;
@ -309,7 +329,6 @@ local unsigned long crc32_big(crc, buf, len)
DOBIG4; DOBIG4;
len -= 4; len -= 4;
} }
buf4++;
buf = (const unsigned char FAR *)buf4; buf = (const unsigned char FAR *)buf4;
if (len) do { if (len) do {

856
Foundation/src/deflate.c
View File

File diff suppressed because it is too large Load Diff

31
Foundation/src/deflate.h
View File

@ -1,5 +1,5 @@
/* deflate.h -- internal compression state /* deflate.h -- internal compression state
* Copyright (C) 1995-2012 Jean-loup Gailly * Copyright (C) 1995-2016 Jean-loup Gailly
* For conditions of distribution and use, see copyright notice in zlib.h * For conditions of distribution and use, see copyright notice in zlib.h
*/ */
@ -51,13 +51,16 @@
#define Buf_size 16 #define Buf_size 16
/* size of bit buffer in bi_buf */ /* size of bit buffer in bi_buf */
#define INIT_STATE 42 #define INIT_STATE 42 /* zlib header -> BUSY_STATE */
#define EXTRA_STATE 69 #ifdef GZIP
#define NAME_STATE 73 # define GZIP_STATE 57 /* gzip header -> BUSY_STATE | EXTRA_STATE */
#define COMMENT_STATE 91 #endif
#define HCRC_STATE 103 #define EXTRA_STATE 69 /* gzip extra block -> NAME_STATE */
#define BUSY_STATE 113 #define NAME_STATE 73 /* gzip file name -> COMMENT_STATE */
#define FINISH_STATE 666 #define COMMENT_STATE 91 /* gzip comment -> HCRC_STATE */
#define HCRC_STATE 103 /* gzip header CRC -> BUSY_STATE */
#define BUSY_STATE 113 /* deflate -> FINISH_STATE */
#define FINISH_STATE 666 /* stream complete */
/* Stream status */ /* Stream status */
@ -83,7 +86,7 @@ typedef struct static_tree_desc_s static_tree_desc;
typedef struct tree_desc_s { typedef struct tree_desc_s {
ct_data *dyn_tree; /* the dynamic tree */ ct_data *dyn_tree; /* the dynamic tree */
int max_code; /* largest code with non zero frequency */ int max_code; /* largest code with non zero frequency */
static_tree_desc *stat_desc; /* the corresponding static tree */ const static_tree_desc *stat_desc; /* the corresponding static tree */
} FAR tree_desc; } FAR tree_desc;
typedef ush Pos; typedef ush Pos;
@ -100,10 +103,10 @@ typedef struct internal_state {
Bytef *pending_buf; /* output still pending */ Bytef *pending_buf; /* output still pending */
ulg pending_buf_size; /* size of pending_buf */ ulg pending_buf_size; /* size of pending_buf */
Bytef *pending_out; /* next pending byte to output to the stream */ Bytef *pending_out; /* next pending byte to output to the stream */
uInt pending; /* nb of bytes in the pending buffer */ ulg pending; /* nb of bytes in the pending buffer */
int wrap; /* bit 0 true for zlib, bit 1 true for gzip */ int wrap; /* bit 0 true for zlib, bit 1 true for gzip */
gz_headerp gzhead; /* gzip header information to write */ gz_headerp gzhead; /* gzip header information to write */
uInt gzindex; /* where in extra, name, or comment */ ulg gzindex; /* where in extra, name, or comment */
Byte method; /* can only be DEFLATED */ Byte method; /* can only be DEFLATED */
int last_flush; /* value of flush param for previous deflate call */ int last_flush; /* value of flush param for previous deflate call */
@ -275,7 +278,7 @@ typedef struct internal_state {
/* Output a byte on the stream. /* Output a byte on the stream.
* IN assertion: there is enough room in pending_buf. * IN assertion: there is enough room in pending_buf.
*/ */
#define put_byte(s, c) {s->pending_buf[s->pending++] = (c);} #define put_byte(s, c) {s->pending_buf[s->pending++] = (Bytef)(c);}
#define MIN_LOOKAHEAD (MAX_MATCH+MIN_MATCH+1) #define MIN_LOOKAHEAD (MAX_MATCH+MIN_MATCH+1)
@ -328,8 +331,8 @@ void ZLIB_INTERNAL _tr_stored_block OF((deflate_state *s, charf *buf,
flush = (s->last_lit == s->lit_bufsize-1); \ flush = (s->last_lit == s->lit_bufsize-1); \
} }
# define _tr_tally_dist(s, distance, length, flush) \ # define _tr_tally_dist(s, distance, length, flush) \
{ uch len = (length); \ { uch len = (uch)(length); \
ush dist = (distance); \ ush dist = (ush)(distance); \
s->d_buf[s->last_lit] = dist; \ s->d_buf[s->last_lit] = dist; \
s->l_buf[s->last_lit++] = len; \ s->l_buf[s->last_lit++] = len; \
dist--; \ dist--; \

20
Foundation/src/gzguts.h
View File

@ -25,6 +25,10 @@
# include <stdlib.h> # include <stdlib.h>
# include <limits.h> # include <limits.h>
#endif #endif
#ifndef _POSIX_SOURCE
# define _POSIX_SOURCE
#endif
#include <fcntl.h> #include <fcntl.h>
#ifdef _WIN32 #ifdef _WIN32
@ -36,6 +40,9 @@
# include <io.h> # include <io.h>
#endif #endif
#endif #endif
#if defined(_WIN32) || defined(__CYGWIN__)
# define WIDECHAR
#endif
#ifdef WINAPI_FAMILY #ifdef WINAPI_FAMILY
# define open _open # define open _open
@ -97,18 +104,19 @@
# endif # endif
#endif #endif
/* unlike snprintf (which is required in C99, yet still not supported by /* unlike snprintf (which is required in C99), _snprintf does not guarantee
Microsoft more than a decade later!), _snprintf does not guarantee null null termination of the result -- however this is only used in gzlib.c where
termination of the result -- however this is only used in gzlib.c where
the result is assured to fit in the space provided */ the result is assured to fit in the space provided */
#ifdef _MSC_VER #if defined(_MSC_VER) && _MSC_VER < 1900
# define snprintf _snprintf # define snprintf _snprintf
#endif #endif
#ifndef local #ifndef local
# define local static # define local static
#endif #endif
/* compile with -Dlocal if your debugger can't find static symbols */ /* since "static" is used to mean two completely different things in C, we
define "local" for the non-static meaning of "static", for readability
(compile with -Dlocal if your debugger can't find static symbols) */
/* gz* functions always use library allocation functions */ /* gz* functions always use library allocation functions */
#ifndef STDC #ifndef STDC
@ -172,7 +180,7 @@ typedef struct {
char *path; /* path or fd for error messages */ char *path; /* path or fd for error messages */
unsigned size; /* buffer size, zero if not allocated yet */ unsigned size; /* buffer size, zero if not allocated yet */
unsigned want; /* requested buffer size, default is GZBUFSIZE */ unsigned want; /* requested buffer size, default is GZBUFSIZE */
unsigned char *in; /* input buffer */ unsigned char *in; /* input buffer (double-sized when writing) */
unsigned char *out; /* output buffer (double-sized when reading) */ unsigned char *out; /* output buffer (double-sized when reading) */
int direct; /* 0 if processing gzip, 1 if transparent */ int direct; /* 0 if processing gzip, 1 if transparent */
/* just for reading */ /* just for reading */

4
Foundation/src/infback.c
View File

@ -1,5 +1,5 @@
/* infback.c -- inflate using a call-back interface /* infback.c -- inflate using a call-back interface
* Copyright (C) 1995-2011 Mark Adler * Copyright (C) 1995-2016 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h * For conditions of distribution and use, see copyright notice in zlib.h
*/ */
@ -61,7 +61,7 @@ int stream_size;
Tracev((stderr, "inflate: allocated\n")); Tracev((stderr, "inflate: allocated\n"));
strm->state = (struct internal_state FAR *)state; strm->state = (struct internal_state FAR *)state;
state->dmax = 32768U; state->dmax = 32768U;
state->wbits = windowBits; state->wbits = (uInt)windowBits;
state->wsize = 1U << windowBits; state->wsize = 1U << windowBits;
state->window = window; state->window = window;
state->wnext = 0; state->wnext = 0;

85
Foundation/src/inffast.c
View File

@ -1,5 +1,5 @@
/* inffast.c -- fast decoding /* inffast.c -- fast decoding
* Copyright (C) 1995-2008, 2010, 2013 Mark Adler * Copyright (C) 1995-2017 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h * For conditions of distribution and use, see copyright notice in zlib.h
*/ */
@ -8,26 +8,9 @@
#include "inflate.h" #include "inflate.h"
#include "inffast.h" #include "inffast.h"
#ifndef ASMINF #ifdef ASMINF
# pragma message("Assembler code may have bugs -- use at your own risk")
/* Allow machine dependent optimization for post-increment or pre-increment.
Based on testing to date,
Pre-increment preferred for:
- PowerPC G3 (Adler)
- MIPS R5000 (Randers-Pehrson)
Post-increment preferred for:
- none
No measurable difference:
- Pentium III (Anderson)
- M68060 (Nikl)
*/
#ifdef POSTINC
# define OFF 0
# define PUP(a) *(a)++
#else #else
# define OFF 1
# define PUP(a) *++(a)
#endif
/* /*
Decode literal, length, and distance codes and write out the resulting Decode literal, length, and distance codes and write out the resulting
@ -96,9 +79,9 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */
/* copy state to local variables */ /* copy state to local variables */
state = (struct inflate_state FAR *)strm->state; state = (struct inflate_state FAR *)strm->state;
in = strm->next_in - OFF; in = strm->next_in;
last = in + (strm->avail_in - 5); last = in + (strm->avail_in - 5);
out = strm->next_out - OFF; out = strm->next_out;
beg = out - (start - strm->avail_out); beg = out - (start - strm->avail_out);
end = out + (strm->avail_out - 257); end = out + (strm->avail_out - 257);
#ifdef INFLATE_STRICT #ifdef INFLATE_STRICT
@ -119,9 +102,9 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */
input data or output space */ input data or output space */
do { do {
if (bits < 15) { if (bits < 15) {
hold += (unsigned long)(PUP(in)) << bits; hold += (unsigned long)(*in++) << bits;
bits += 8; bits += 8;
hold += (unsigned long)(PUP(in)) << bits; hold += (unsigned long)(*in++) << bits;
bits += 8; bits += 8;
} }
here = lcode[hold & lmask]; here = lcode[hold & lmask];
@ -134,14 +117,14 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */
Tracevv((stderr, here.val >= 0x20 && here.val < 0x7f ? Tracevv((stderr, here.val >= 0x20 && here.val < 0x7f ?
"inflate: literal '%c'\n" : "inflate: literal '%c'\n" :
"inflate: literal 0x%02x\n", here.val)); "inflate: literal 0x%02x\n", here.val));
PUP(out) = (unsigned char)(here.val); *out++ = (unsigned char)(here.val);
} }
else if (op & 16) { /* length base */ else if (op & 16) { /* length base */
len = (unsigned)(here.val); len = (unsigned)(here.val);
op &= 15; /* number of extra bits */ op &= 15; /* number of extra bits */
if (op) { if (op) {
if (bits < op) { if (bits < op) {
hold += (unsigned long)(PUP(in)) << bits; hold += (unsigned long)(*in++) << bits;
bits += 8; bits += 8;
} }
len += (unsigned)hold & ((1U << op) - 1); len += (unsigned)hold & ((1U << op) - 1);
@ -150,9 +133,9 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */
} }
Tracevv((stderr, "inflate: length %u\n", len)); Tracevv((stderr, "inflate: length %u\n", len));
if (bits < 15) { if (bits < 15) {
hold += (unsigned long)(PUP(in)) << bits; hold += (unsigned long)(*in++) << bits;
bits += 8; bits += 8;
hold += (unsigned long)(PUP(in)) << bits; hold += (unsigned long)(*in++) << bits;
bits += 8; bits += 8;
} }
here = dcode[hold & dmask]; here = dcode[hold & dmask];
@ -165,10 +148,10 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */
dist = (unsigned)(here.val); dist = (unsigned)(here.val);
op &= 15; /* number of extra bits */ op &= 15; /* number of extra bits */
if (bits < op) { if (bits < op) {
hold += (unsigned long)(PUP(in)) << bits; hold += (unsigned long)(*in++) << bits;
bits += 8; bits += 8;
if (bits < op) { if (bits < op) {
hold += (unsigned long)(PUP(in)) << bits; hold += (unsigned long)(*in++) << bits;
bits += 8; bits += 8;
} }
} }
@ -196,30 +179,30 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */
#ifdef INFLATE_ALLOW_INVALID_DISTANCE_TOOFAR_ARRR #ifdef INFLATE_ALLOW_INVALID_DISTANCE_TOOFAR_ARRR
if (len <= op - whave) { if (len <= op - whave) {
do { do {
PUP(out) = 0; *out++ = 0;
} while (--len); } while (--len);
continue; continue;
} }
len -= op - whave; len -= op - whave;
do { do {
PUP(out) = 0; *out++ = 0;
} while (--op > whave); } while (--op > whave);
if (op == 0) { if (op == 0) {
from = out - dist; from = out - dist;
do { do {
PUP(out) = PUP(from); *out++ = *from++;
} while (--len); } while (--len);
continue; continue;
} }
#endif #endif
} }
from = window - OFF; from = window;
if (wnext == 0) { /* very common case */ if (wnext == 0) { /* very common case */
from += wsize - op; from += wsize - op;
if (op < len) { /* some from window */ if (op < len) { /* some from window */
len -= op; len -= op;
do { do {
PUP(out) = PUP(from); *out++ = *from++;
} while (--op); } while (--op);
from = out - dist; /* rest from output */ from = out - dist; /* rest from output */
} }
@ -230,14 +213,14 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */
if (op < len) { /* some from end of window */ if (op < len) { /* some from end of window */
len -= op; len -= op;
do { do {
PUP(out) = PUP(from); *out++ = *from++;
} while (--op); } while (--op);
from = window - OFF; from = window;
if (wnext < len) { /* some from start of window */ if (wnext < len) { /* some from start of window */
op = wnext; op = wnext;
len -= op; len -= op;
do { do {
PUP(out) = PUP(from); *out++ = *from++;
} while (--op); } while (--op);
from = out - dist; /* rest from output */ from = out - dist; /* rest from output */
} }
@ -248,35 +231,35 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */
if (op < len) { /* some from window */ if (op < len) { /* some from window */
len -= op; len -= op;
do { do {
PUP(out) = PUP(from); *out++ = *from++;
} while (--op); } while (--op);
from = out - dist; /* rest from output */ from = out - dist; /* rest from output */
} }
} }
while (len > 2) { while (len > 2) {
PUP(out) = PUP(from); *out++ = *from++;
PUP(out) = PUP(from); *out++ = *from++;
PUP(out) = PUP(from); *out++ = *from++;
len -= 3; len -= 3;
} }
if (len) { if (len) {
PUP(out) = PUP(from); *out++ = *from++;
if (len > 1) if (len > 1)
PUP(out) = PUP(from); *out++ = *from++;
} }
} }
else { else {
from = out - dist; /* copy direct from output */ from = out - dist; /* copy direct from output */
do { /* minimum length is three */ do { /* minimum length is three */
PUP(out) = PUP(from); *out++ = *from++;
PUP(out) = PUP(from); *out++ = *from++;
PUP(out) = PUP(from); *out++ = *from++;
len -= 3; len -= 3;
} while (len > 2); } while (len > 2);
if (len) { if (len) {
PUP(out) = PUP(from); *out++ = *from++;
if (len > 1) if (len > 1)
PUP(out) = PUP(from); *out++ = *from++;
} }
} }
} }
@ -313,8 +296,8 @@ unsigned start; /* inflate()'s starting value for strm->avail_out */
hold &= (1U << bits) - 1; hold &= (1U << bits) - 1;
/* update state and return */ /* update state and return */
strm->next_in = in + OFF; strm->next_in = in;
strm->next_out = out + OFF; strm->next_out = out;
strm->avail_in = (unsigned)(in < last ? 5 + (last - in) : 5 - (in - last)); strm->avail_in = (unsigned)(in < last ? 5 + (last - in) : 5 - (in - last));
strm->avail_out = (unsigned)(out < end ? strm->avail_out = (unsigned)(out < end ?
257 + (end - out) : 257 - (out - end)); 257 + (end - out) : 257 - (out - end));

123
Foundation/src/inflate.c
View File

@ -1,5 +1,5 @@
/* inflate.c -- zlib decompression /* inflate.c -- zlib decompression
* Copyright (C) 1995-2012 Mark Adler * Copyright (C) 1995-2016 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h * For conditions of distribution and use, see copyright notice in zlib.h
*/ */
@ -92,6 +92,7 @@
#endif #endif
/* function prototypes */ /* function prototypes */
local int inflateStateCheck OF((z_streamp strm));
local void fixedtables OF((struct inflate_state FAR *state)); local void fixedtables OF((struct inflate_state FAR *state));
local int updatewindow OF((z_streamp strm, const unsigned char FAR *end, local int updatewindow OF((z_streamp strm, const unsigned char FAR *end,
unsigned copy)); unsigned copy));
@ -101,12 +102,26 @@ local int updatewindow OF((z_streamp strm, const unsigned char FAR *end,
local unsigned syncsearch OF((unsigned FAR *have, const unsigned char FAR *buf, local unsigned syncsearch OF((unsigned FAR *have, const unsigned char FAR *buf,
unsigned len)); unsigned len));
local int inflateStateCheck(strm)
z_streamp strm;
{
struct inflate_state FAR *state;
if (strm == Z_NULL ||
strm->zalloc == (alloc_func)0 || strm->zfree == (free_func)0)
return 1;
state = (struct inflate_state FAR *)strm->state;
if (state == Z_NULL || state->strm != strm ||
state->mode < HEAD || state->mode > SYNC)
return 1;
return 0;
}
int ZEXPORT inflateResetKeep(strm) int ZEXPORT inflateResetKeep(strm)
z_streamp strm; z_streamp strm;
{ {
struct inflate_state FAR *state; struct inflate_state FAR *state;
if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR; if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
state = (struct inflate_state FAR *)strm->state; state = (struct inflate_state FAR *)strm->state;
strm->total_in = strm->total_out = state->total = 0; strm->total_in = strm->total_out = state->total = 0;
strm->msg = Z_NULL; strm->msg = Z_NULL;
@ -131,7 +146,7 @@ z_streamp strm;
{ {
struct inflate_state FAR *state; struct inflate_state FAR *state;
if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR; if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
state = (struct inflate_state FAR *)strm->state; state = (struct inflate_state FAR *)strm->state;
state->wsize = 0; state->wsize = 0;
state->whave = 0; state->whave = 0;
@ -147,7 +162,7 @@ int windowBits;
struct inflate_state FAR *state; struct inflate_state FAR *state;
/* get the state */ /* get the state */
if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR; if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
state = (struct inflate_state FAR *)strm->state; state = (struct inflate_state FAR *)strm->state;
/* extract wrap request from windowBits parameter */ /* extract wrap request from windowBits parameter */
@ -156,7 +171,7 @@ int windowBits;
windowBits = -windowBits; windowBits = -windowBits;
} }
else { else {
wrap = (windowBits >> 4) + 1; wrap = (windowBits >> 4) + 5;
#ifdef GUNZIP #ifdef GUNZIP
if (windowBits < 48) if (windowBits < 48)
windowBits &= 15; windowBits &= 15;
@ -210,7 +225,9 @@ int stream_size;
if (state == Z_NULL) return Z_MEM_ERROR; if (state == Z_NULL) return Z_MEM_ERROR;
Tracev((stderr, "inflate: allocated\n")); Tracev((stderr, "inflate: allocated\n"));
strm->state = (struct internal_state FAR *)state; strm->state = (struct internal_state FAR *)state;
state->strm = strm;
state->window = Z_NULL; state->window = Z_NULL;
state->mode = HEAD; /* to pass state test in inflateReset2() */
ret = inflateReset2(strm, windowBits); ret = inflateReset2(strm, windowBits);
if (ret != Z_OK) { if (ret != Z_OK) {
ZFREE(strm, state); ZFREE(strm, state);
@ -234,17 +251,17 @@ int value;
{ {
struct inflate_state FAR *state; struct inflate_state FAR *state;
if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR; if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
state = (struct inflate_state FAR *)strm->state; state = (struct inflate_state FAR *)strm->state;
if (bits < 0) { if (bits < 0) {
state->hold = 0; state->hold = 0;
state->bits = 0; state->bits = 0;
return Z_OK; return Z_OK;
} }
if (bits > 16 || state->bits + bits > 32) return Z_STREAM_ERROR; if (bits > 16 || state->bits + (uInt)bits > 32) return Z_STREAM_ERROR;
value &= (1L << bits) - 1; value &= (1L << bits) - 1;
state->hold += value << state->bits; state->hold += (unsigned)value << state->bits;
state->bits += bits; state->bits += (uInt)bits;
return Z_OK; return Z_OK;
} }
@ -625,7 +642,7 @@ int flush;
static const unsigned short order[19] = /* permutation of code lengths */ static const unsigned short order[19] = /* permutation of code lengths */
{16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15}; {16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};
if (strm == Z_NULL || strm->state == Z_NULL || strm->next_out == Z_NULL || if (inflateStateCheck(strm) || strm->next_out == Z_NULL ||
(strm->next_in == Z_NULL && strm->avail_in != 0)) (strm->next_in == Z_NULL && strm->avail_in != 0))
return Z_STREAM_ERROR; return Z_STREAM_ERROR;
@ -645,6 +662,8 @@ int flush;
NEEDBITS(16); NEEDBITS(16);
#ifdef GUNZIP #ifdef GUNZIP
if ((state->wrap & 2) && hold == 0x8b1f) { /* gzip header */ if ((state->wrap & 2) && hold == 0x8b1f) { /* gzip header */
if (state->wbits == 0)
state->wbits = 15;
state->check = crc32(0L, Z_NULL, 0); state->check = crc32(0L, Z_NULL, 0);
CRC2(state->check, hold); CRC2(state->check, hold);
INITBITS(); INITBITS();
@ -672,7 +691,7 @@ int flush;
len = BITS(4) + 8; len = BITS(4) + 8;
if (state->wbits == 0) if (state->wbits == 0)
state->wbits = len; state->wbits = len;
else if (len > state->wbits) { if (len > 15 || len > state->wbits) {
strm->msg = (char *)"invalid window size"; strm->msg = (char *)"invalid window size";
state->mode = BAD; state->mode = BAD;
break; break;
@ -699,14 +718,16 @@ int flush;
} }
if (state->head != Z_NULL) if (state->head != Z_NULL)
state->head->text = (int)((hold >> 8) & 1); state->head->text = (int)((hold >> 8) & 1);
if (state->flags & 0x0200) CRC2(state->check, hold); if ((state->flags & 0x0200) && (state->wrap & 4))
CRC2(state->check, hold);
INITBITS(); INITBITS();
state->mode = TIME; state->mode = TIME;
case TIME: case TIME:
NEEDBITS(32); NEEDBITS(32);
if (state->head != Z_NULL) if (state->head != Z_NULL)
state->head->time = hold; state->head->time = hold;
if (state->flags & 0x0200) CRC4(state->check, hold); if ((state->flags & 0x0200) && (state->wrap & 4))
CRC4(state->check, hold);
INITBITS(); INITBITS();
state->mode = OS; state->mode = OS;
case OS: case OS:
@ -715,7 +736,8 @@ int flush;
state->head->xflags = (int)(hold & 0xff); state->head->xflags = (int)(hold & 0xff);
state->head->os = (int)(hold >> 8); state->head->os = (int)(hold >> 8);
} }
if (state->flags & 0x0200) CRC2(state->check, hold); if ((state->flags & 0x0200) && (state->wrap & 4))
CRC2(state->check, hold);
INITBITS(); INITBITS();
state->mode = EXLEN; state->mode = EXLEN;
case EXLEN: case EXLEN:
@ -724,7 +746,8 @@ int flush;
state->length = (unsigned)(hold); state->length = (unsigned)(hold);
if (state->head != Z_NULL) if (state->head != Z_NULL)
state->head->extra_len = (unsigned)hold; state->head->extra_len = (unsigned)hold;
if (state->flags & 0x0200) CRC2(state->check, hold); if ((state->flags & 0x0200) && (state->wrap & 4))
CRC2(state->check, hold);
INITBITS(); INITBITS();
} }
else if (state->head != Z_NULL) else if (state->head != Z_NULL)
@ -742,7 +765,7 @@ int flush;
len + copy > state->head->extra_max ? len + copy > state->head->extra_max ?
state->head->extra_max - len : copy); state->head->extra_max - len : copy);
} }
if (state->flags & 0x0200) if ((state->flags & 0x0200) && (state->wrap & 4))
state->check = crc32(state->check, next, copy); state->check = crc32(state->check, next, copy);
have -= copy; have -= copy;
next += copy; next += copy;
@ -761,9 +784,9 @@ int flush;
if (state->head != Z_NULL && if (state->head != Z_NULL &&
state->head->name != Z_NULL && state->head->name != Z_NULL &&
state->length < state->head->name_max) state->length < state->head->name_max)
state->head->name[state->length++] = len; state->head->name[state->length++] = (Bytef)len;
} while (len && copy < have); } while (len && copy < have);
if (state->flags & 0x0200) if ((state->flags & 0x0200) && (state->wrap & 4))
state->check = crc32(state->check, next, copy); state->check = crc32(state->check, next, copy);
have -= copy; have -= copy;
next += copy; next += copy;
@ -782,9 +805,9 @@ int flush;
if (state->head != Z_NULL && if (state->head != Z_NULL &&
state->head->comment != Z_NULL && state->head->comment != Z_NULL &&
state->length < state->head->comm_max) state->length < state->head->comm_max)
state->head->comment[state->length++] = len; state->head->comment[state->length++] = (Bytef)len;
} while (len && copy < have); } while (len && copy < have);
if (state->flags & 0x0200) if ((state->flags & 0x0200) && (state->wrap & 4))
state->check = crc32(state->check, next, copy); state->check = crc32(state->check, next, copy);
have -= copy; have -= copy;
next += copy; next += copy;
@ -796,7 +819,7 @@ int flush;
case HCRC: case HCRC:
if (state->flags & 0x0200) { if (state->flags & 0x0200) {
NEEDBITS(16); NEEDBITS(16);
if (hold != (state->check & 0xffff)) { if ((state->wrap & 4) && hold != (state->check & 0xffff)) {
strm->msg = (char *)"header crc mismatch"; strm->msg = (char *)"header crc mismatch";
state->mode = BAD; state->mode = BAD;
break; break;
@ -1177,11 +1200,11 @@ int flush;
out -= left; out -= left;
strm->total_out += out; strm->total_out += out;
state->total += out; state->total += out;
if (out) if ((state->wrap & 4) && out)
strm->adler = state->check = strm->adler = state->check =
UPDATE(state->check, put - out, out); UPDATE(state->check, put - out, out);
out = left; out = left;
if (( if ((state->wrap & 4) && (
#ifdef GUNZIP #ifdef GUNZIP
state->flags ? hold : state->flags ? hold :
#endif #endif
@ -1240,10 +1263,10 @@ int flush;
strm->total_in += in; strm->total_in += in;
strm->total_out += out; strm->total_out += out;
state->total += out; state->total += out;
if (state->wrap && out) if ((state->wrap & 4) && out)
strm->adler = state->check = strm->adler = state->check =
UPDATE(state->check, strm->next_out - out, out); UPDATE(state->check, strm->next_out - out, out);
strm->data_type = state->bits + (state->last ? 64 : 0) + strm->data_type = (int)state->bits + (state->last ? 64 : 0) +
(state->mode == TYPE ? 128 : 0) + (state->mode == TYPE ? 128 : 0) +
(state->mode == LEN_ || state->mode == COPY_ ? 256 : 0); (state->mode == LEN_ || state->mode == COPY_ ? 256 : 0);
if (((in == 0 && out == 0) || flush == Z_FINISH) && ret == Z_OK) if (((in == 0 && out == 0) || flush == Z_FINISH) && ret == Z_OK)
@ -1255,7 +1278,7 @@ int ZEXPORT inflateEnd(strm)
z_streamp strm; z_streamp strm;
{ {
struct inflate_state FAR *state; struct inflate_state FAR *state;
if (strm == Z_NULL || strm->state == Z_NULL || strm->zfree == (free_func)0) if (inflateStateCheck(strm))
return Z_STREAM_ERROR; return Z_STREAM_ERROR;
state = (struct inflate_state FAR *)strm->state; state = (struct inflate_state FAR *)strm->state;
if (state->window != Z_NULL) ZFREE(strm, state->window); if (state->window != Z_NULL) ZFREE(strm, state->window);
@ -1273,7 +1296,7 @@ uInt *dictLength;
struct inflate_state FAR *state; struct inflate_state FAR *state;
/* check state */ /* check state */
if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR; if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
state = (struct inflate_state FAR *)strm->state; state = (struct inflate_state FAR *)strm->state;
/* copy dictionary */ /* copy dictionary */
@ -1298,7 +1321,7 @@ uInt dictLength;
int ret; int ret;
/* check state */ /* check state */
if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR; if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
state = (struct inflate_state FAR *)strm->state; state = (struct inflate_state FAR *)strm->state;
if (state->wrap != 0 && state->mode != DICT) if (state->wrap != 0 && state->mode != DICT)
return Z_STREAM_ERROR; return Z_STREAM_ERROR;
@ -1330,7 +1353,7 @@ gz_headerp head;
struct inflate_state FAR *state; struct inflate_state FAR *state;
/* check state */ /* check state */
if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR; if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
state = (struct inflate_state FAR *)strm->state; state = (struct inflate_state FAR *)strm->state;
if ((state->wrap & 2) == 0) return Z_STREAM_ERROR; if ((state->wrap & 2) == 0) return Z_STREAM_ERROR;
@ -1383,7 +1406,7 @@ z_streamp strm;
struct inflate_state FAR *state; struct inflate_state FAR *state;
/* check parameters */ /* check parameters */
if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR; if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
state = (struct inflate_state FAR *)strm->state; state = (struct inflate_state FAR *)strm->state;
if (strm->avail_in == 0 && state->bits < 8) return Z_BUF_ERROR; if (strm->avail_in == 0 && state->bits < 8) return Z_BUF_ERROR;
@ -1430,7 +1453,7 @@ z_streamp strm;
{ {
struct inflate_state FAR *state; struct inflate_state FAR *state;
if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR; if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
state = (struct inflate_state FAR *)strm->state; state = (struct inflate_state FAR *)strm->state;
return state->mode == STORED && state->bits == 0; return state->mode == STORED && state->bits == 0;
} }
@ -1445,8 +1468,7 @@ z_streamp source;
unsigned wsize; unsigned wsize;
/* check input */ /* check input */
if (dest == Z_NULL || source == Z_NULL || source->state == Z_NULL || if (inflateStateCheck(source) || dest == Z_NULL)
source->zalloc == (alloc_func)0 || source->zfree == (free_func)0)
return Z_STREAM_ERROR; return Z_STREAM_ERROR;
state = (struct inflate_state FAR *)source->state; state = (struct inflate_state FAR *)source->state;
@ -1467,6 +1489,7 @@ z_streamp source;
/* copy state */ /* copy state */
zmemcpy((voidpf)dest, (voidpf)source, sizeof(z_stream)); zmemcpy((voidpf)dest, (voidpf)source, sizeof(z_stream));
zmemcpy((voidpf)copy, (voidpf)state, sizeof(struct inflate_state)); zmemcpy((voidpf)copy, (voidpf)state, sizeof(struct inflate_state));
copy->strm = dest;
if (state->lencode >= state->codes && if (state->lencode >= state->codes &&
state->lencode <= state->codes + ENOUGH - 1) { state->lencode <= state->codes + ENOUGH - 1) {
copy->lencode = copy->codes + (state->lencode - state->codes); copy->lencode = copy->codes + (state->lencode - state->codes);
@ -1488,25 +1511,51 @@ int subvert;
{ {
struct inflate_state FAR *state; struct inflate_state FAR *state;
if (strm == Z_NULL || strm->state == Z_NULL) return Z_STREAM_ERROR; if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
state = (struct inflate_state FAR *)strm->state; state = (struct inflate_state FAR *)strm->state;
state->sane = !subvert;
#ifdef INFLATE_ALLOW_INVALID_DISTANCE_TOOFAR_ARRR #ifdef INFLATE_ALLOW_INVALID_DISTANCE_TOOFAR_ARRR
state->sane = !subvert;
return Z_OK; return Z_OK;
#else #else
(void)subvert;
state->sane = 1; state->sane = 1;
return Z_DATA_ERROR; return Z_DATA_ERROR;
#endif #endif
} }
int ZEXPORT inflateValidate(strm, check)
z_streamp strm;
int check;
{
struct inflate_state FAR *state;
if (inflateStateCheck(strm)) return Z_STREAM_ERROR;
state = (struct inflate_state FAR *)strm->state;
if (check)
state->wrap |= 4;
else
state->wrap &= ~4;
return Z_OK;
}
long ZEXPORT inflateMark(strm) long ZEXPORT inflateMark(strm)
z_streamp strm; z_streamp strm;
{ {
struct inflate_state FAR *state; struct inflate_state FAR *state;
if (strm == Z_NULL || strm->state == Z_NULL) return -1L << 16; if (inflateStateCheck(strm))
return -(1L << 16);
state = (struct inflate_state FAR *)strm->state; state = (struct inflate_state FAR *)strm->state;
return ((long)(state->back) << 16) + return (long)(((unsigned long)((long)state->back)) << 16) +
(state->mode == COPY ? state->length : (state->mode == COPY ? state->length :
(state->mode == MATCH ? state->was - state->length : 0)); (state->mode == MATCH ? state->was - state->length : 0));
} }
unsigned long ZEXPORT inflateCodesUsed(strm)
z_streamp strm;
{
struct inflate_state FAR *state;
if (inflateStateCheck(strm)) return (unsigned long)-1;
state = (struct inflate_state FAR *)strm->state;
return (unsigned long)(state->next - state->codes);
}

11
Foundation/src/inflate.h
View File

@ -1,5 +1,5 @@
/* inflate.h -- internal inflate state definition /* inflate.h -- internal inflate state definition
* Copyright (C) 1995-2009 Mark Adler * Copyright (C) 1995-2016 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h * For conditions of distribution and use, see copyright notice in zlib.h
*/ */
@ -18,7 +18,7 @@
/* Possible inflate modes between inflate() calls */ /* Possible inflate modes between inflate() calls */
typedef enum { typedef enum {
HEAD, /* i: waiting for magic header */ HEAD = 16180, /* i: waiting for magic header */
FLAGS, /* i: waiting for method and flags (gzip) */ FLAGS, /* i: waiting for method and flags (gzip) */
TIME, /* i: waiting for modification time (gzip) */ TIME, /* i: waiting for modification time (gzip) */
OS, /* i: waiting for extra flags and operating system (gzip) */ OS, /* i: waiting for extra flags and operating system (gzip) */
@ -77,11 +77,14 @@ typedef enum {
CHECK -> LENGTH -> DONE CHECK -> LENGTH -> DONE
*/ */
/* state maintained between inflate() calls. Approximately 10K bytes. */ /* State maintained between inflate() calls -- approximately 7K bytes, not
including the allocated sliding window, which is up to 32K bytes. */
struct inflate_state { struct inflate_state {
z_streamp strm; /* pointer back to this zlib stream */
inflate_mode mode; /* current inflate mode */ inflate_mode mode; /* current inflate mode */
int last; /* true if processing last block */ int last; /* true if processing last block */
int wrap; /* bit 0 true for zlib, bit 1 true for gzip */ int wrap; /* bit 0 true for zlib, bit 1 true for gzip,
bit 2 true to validate check value */
int havedict; /* true if dictionary provided */ int havedict; /* true if dictionary provided */
int flags; /* gzip header method and flags (0 if zlib) */ int flags; /* gzip header method and flags (0 if zlib) */
unsigned dmax; /* zlib header max distance (INFLATE_STRICT) */ unsigned dmax; /* zlib header max distance (INFLATE_STRICT) */

26
Foundation/src/inftrees.c
View File

@ -1,5 +1,5 @@
/* inftrees.c -- generate Huffman trees for efficient decoding /* inftrees.c -- generate Huffman trees for efficient decoding
* Copyright (C) 1995-2013 Mark Adler * Copyright (C) 1995-2017 Mark Adler
* For conditions of distribution and use, see copyright notice in zlib.h * For conditions of distribution and use, see copyright notice in zlib.h
*/ */
@ -9,7 +9,7 @@
#define MAXBITS 15 #define MAXBITS 15
const char inflate_copyright[] = const char inflate_copyright[] =
" inflate 1.2.8 Copyright 1995-2013 Mark Adler "; " inflate 1.2.11 Copyright 1995-2017 Mark Adler ";
/* /*
If you use the zlib library in a product, an acknowledgment is welcome 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 in the documentation of your product. If for some reason you cannot
@ -54,7 +54,7 @@ unsigned short FAR *work;
code FAR *next; /* next available space in table */ code FAR *next; /* next available space in table */
const unsigned short FAR *base; /* base value table to use */ const unsigned short FAR *base; /* base value table to use */
const unsigned short FAR *extra; /* extra bits table to use */ const unsigned short FAR *extra; /* extra bits table to use */
int end; /* use base and extra for symbol > end */ unsigned match; /* use base and extra for symbol >= match */
unsigned short count[MAXBITS+1]; /* number of codes of each length */ unsigned short count[MAXBITS+1]; /* number of codes of each length */
unsigned short offs[MAXBITS+1]; /* offsets in table for each length */ unsigned short offs[MAXBITS+1]; /* offsets in table for each length */
static const unsigned short lbase[31] = { /* Length codes 257..285 base */ static const unsigned short lbase[31] = { /* Length codes 257..285 base */
@ -62,7 +62,7 @@ unsigned short FAR *work;
35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0}; 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 */ 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, 16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18,
19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 72, 78}; 19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 21, 16, 77, 202};
static const unsigned short dbase[32] = { /* Distance codes 0..29 base */ 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, 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, 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
@ -181,19 +181,17 @@ unsigned short FAR *work;
switch (type) { switch (type) {
case CODES: case CODES:
base = extra = work; /* dummy value--not used */ base = extra = work; /* dummy value--not used */
end = 19; match = 20;
break; break;
case LENS: case LENS:
base = lbase; base = lbase;
base -= 257;
extra = lext; extra = lext;
extra -= 257; match = 257;
end = 256;
break; break;
default: /* DISTS */ default: /* DISTS */
base = dbase; base = dbase;
extra = dext; extra = dext;
end = -1; match = 0;
} }
/* initialize state for loop */ /* initialize state for loop */
@ -216,13 +214,13 @@ unsigned short FAR *work;
for (;;) { for (;;) {
/* create table entry */ /* create table entry */
here.bits = (unsigned char)(len - drop); here.bits = (unsigned char)(len - drop);
if ((int)(work[sym]) < end) { if (work[sym] + 1U < match) {
here.op = (unsigned char)0; here.op = (unsigned char)0;
here.val = work[sym]; here.val = work[sym];
} }
else if ((int)(work[sym]) > end) { else if (work[sym] >= match) {
here.op = (unsigned char)(extra[work[sym]]); here.op = (unsigned char)(extra[work[sym] - match]);
here.val = base[work[sym]]; here.val = base[work[sym] - match];
} }
else { else {
here.op = (unsigned char)(32 + 64); /* end of block */ here.op = (unsigned char)(32 + 64); /* end of block */

79
Foundation/src/trees.c
View File

@ -1,5 +1,5 @@
/* trees.c -- output deflated data using Huffman coding /* trees.c -- output deflated data using Huffman coding
* Copyright (C) 1995-2012 Jean-loup Gailly * Copyright (C) 1995-2017 Jean-loup Gailly
* detect_data_type() function provided freely by Cosmin Truta, 2006 * detect_data_type() function provided freely by Cosmin Truta, 2006
* For conditions of distribution and use, see copyright notice in zlib.h * For conditions of distribution and use, see copyright notice in zlib.h
*/ */
@ -122,13 +122,13 @@ struct static_tree_desc_s {
int max_length; /* max bit length for the codes */ int max_length; /* max bit length for the codes */
}; };
local static_tree_desc static_l_desc = local const static_tree_desc static_l_desc =
{static_ltree, extra_lbits, LITERALS+1, L_CODES, MAX_BITS}; {static_ltree, extra_lbits, LITERALS+1, L_CODES, MAX_BITS};
local static_tree_desc static_d_desc = local const static_tree_desc static_d_desc =
{static_dtree, extra_dbits, 0, D_CODES, MAX_BITS}; {static_dtree, extra_dbits, 0, D_CODES, MAX_BITS};
local static_tree_desc static_bl_desc = local const static_tree_desc static_bl_desc =
{(const ct_data *)0, extra_blbits, 0, BL_CODES, MAX_BL_BITS}; {(const ct_data *)0, extra_blbits, 0, BL_CODES, MAX_BL_BITS};
/* =========================================================================== /* ===========================================================================
@ -152,8 +152,6 @@ local int detect_data_type OF((deflate_state *s));
local unsigned bi_reverse OF((unsigned value, int length)); local unsigned bi_reverse OF((unsigned value, int length));
local void bi_windup OF((deflate_state *s)); local void bi_windup OF((deflate_state *s));
local void bi_flush OF((deflate_state *s)); local void bi_flush OF((deflate_state *s));
local void copy_block OF((deflate_state *s, charf *buf, unsigned len,
int header));
#ifdef GEN_TREES_H #ifdef GEN_TREES_H
local void gen_trees_header OF((void)); local void gen_trees_header OF((void));
@ -163,7 +161,7 @@ local void gen_trees_header OF((void));
# define send_code(s, c, tree) send_bits(s, tree[c].Code, tree[c].Len) # define send_code(s, c, tree) send_bits(s, tree[c].Code, tree[c].Len)
/* Send a code of the given tree. c and tree must not have side effects */ /* Send a code of the given tree. c and tree must not have side effects */
#else /* DEBUG */ #else /* !ZLIB_DEBUG */
# define send_code(s, c, tree) \ # define send_code(s, c, tree) \
{ if (z_verbose>2) fprintf(stderr,"\ncd %3d ",(c)); \ { if (z_verbose>2) fprintf(stderr,"\ncd %3d ",(c)); \
send_bits(s, tree[c].Code, tree[c].Len); } send_bits(s, tree[c].Code, tree[c].Len); }
@ -208,12 +206,12 @@ local void send_bits(s, value, length)
s->bi_valid += length; s->bi_valid += length;
} }
} }
#else /* !DEBUG */ #else /* !ZLIB_DEBUG */
#define send_bits(s, value, length) \ #define send_bits(s, value, length) \
{ int len = length;\ { int len = length;\
if (s->bi_valid > (int)Buf_size - len) {\ if (s->bi_valid > (int)Buf_size - len) {\
int val = value;\ int val = (int)value;\
s->bi_buf |= (ush)val << s->bi_valid;\ s->bi_buf |= (ush)val << s->bi_valid;\
put_short(s, s->bi_buf);\ put_short(s, s->bi_buf);\
s->bi_buf = (ush)val >> (Buf_size - s->bi_valid);\ s->bi_buf = (ush)val >> (Buf_size - s->bi_valid);\
@ -223,7 +221,7 @@ local void send_bits(s, value, length)
s->bi_valid += len;\ s->bi_valid += len;\
}\ }\
} }
#endif /* DEBUG */ #endif /* ZLIB_DEBUG */
/* the arguments must not have side effects */ /* the arguments must not have side effects */
@ -317,7 +315,7 @@ local void tr_static_init()
* Genererate the file trees.h describing the static trees. * Genererate the file trees.h describing the static trees.
*/ */
#ifdef GEN_TREES_H #ifdef GEN_TREES_H
# ifndef DEBUG # ifndef ZLIB_DEBUG
# include <stdio.h> # include <stdio.h>
# endif # endif
@ -522,12 +520,12 @@ local void gen_bitlen(s, desc)
xbits = 0; xbits = 0;
if (n >= base) xbits = extra[n-base]; if (n >= base) xbits = extra[n-base];
f = tree[n].Freq; f = tree[n].Freq;
s->opt_len += (ulg)f * (bits + xbits); s->opt_len += (ulg)f * (unsigned)(bits + xbits);
if (stree) s->static_len += (ulg)f * (stree[n].Len + xbits); if (stree) s->static_len += (ulg)f * (unsigned)(stree[n].Len + xbits);
} }
if (overflow == 0) return; if (overflow == 0) return;
Trace((stderr,"\nbit length overflow\n")); Tracev((stderr,"\nbit length overflow\n"));
/* This happens for example on obj2 and pic of the Calgary corpus */ /* This happens for example on obj2 and pic of the Calgary corpus */
/* Find the first bit length which could increase: */ /* Find the first bit length which could increase: */
@ -554,9 +552,8 @@ local void gen_bitlen(s, desc)
m = s->heap[--h]; m = s->heap[--h];
if (m > max_code) continue; if (m > max_code) continue;
if ((unsigned) tree[m].Len != (unsigned) bits) { if ((unsigned) tree[m].Len != (unsigned) bits) {
Trace((stderr,"code %d bits %d->%d\n", m, tree[m].Len, bits)); Tracev((stderr,"code %d bits %d->%d\n", m, tree[m].Len, bits));
s->opt_len += ((long)bits - (long)tree[m].Len) s->opt_len += ((ulg)bits - tree[m].Len) * tree[m].Freq;
*(long)tree[m].Freq;
tree[m].Len = (ush)bits; tree[m].Len = (ush)bits;
} }
n--; n--;
@ -578,7 +575,7 @@ local void gen_codes (tree, max_code, bl_count)
ushf *bl_count; /* number of codes at each bit length */ ushf *bl_count; /* number of codes at each bit length */
{ {
ush next_code[MAX_BITS+1]; /* next code value for each bit length */ ush next_code[MAX_BITS+1]; /* next code value for each bit length */
ush code = 0; /* running code value */ unsigned code = 0; /* running code value */
int bits; /* bit index */ int bits; /* bit index */
int n; /* code index */ int n; /* code index */
@ -586,7 +583,8 @@ local void gen_codes (tree, max_code, bl_count)
* without bit reversal. * without bit reversal.
*/ */
for (bits = 1; bits <= MAX_BITS; bits++) { for (bits = 1; bits <= MAX_BITS; bits++) {
next_code[bits] = code = (code + bl_count[bits-1]) << 1; code = (code + bl_count[bits-1]) << 1;
next_code[bits] = (ush)code;
} }
/* Check that the bit counts in bl_count are consistent. The last code /* Check that the bit counts in bl_count are consistent. The last code
* must be all ones. * must be all ones.
@ -599,7 +597,7 @@ local void gen_codes (tree, max_code, bl_count)
int len = tree[n].Len; int len = tree[n].Len;
if (len == 0) continue; if (len == 0) continue;
/* Now reverse the bits */ /* Now reverse the bits */
tree[n].Code = bi_reverse(next_code[len]++, len); tree[n].Code = (ush)bi_reverse(next_code[len]++, len);
Tracecv(tree != static_ltree, (stderr,"\nn %3d %c l %2d c %4x (%x) ", Tracecv(tree != static_ltree, (stderr,"\nn %3d %c l %2d c %4x (%x) ",
n, (isgraph(n) ? n : ' '), len, tree[n].Code, next_code[len]-1)); n, (isgraph(n) ? n : ' '), len, tree[n].Code, next_code[len]-1));
@ -821,7 +819,7 @@ local int build_bl_tree(s)
if (s->bl_tree[bl_order[max_blindex]].Len != 0) break; if (s->bl_tree[bl_order[max_blindex]].Len != 0) break;
} }
/* Update opt_len to include the bit length tree and counts */ /* Update opt_len to include the bit length tree and counts */
s->opt_len += 3*(max_blindex+1) + 5+5+4; s->opt_len += 3*((ulg)max_blindex+1) + 5+5+4;
Tracev((stderr, "\ndyn trees: dyn %ld, stat %ld", Tracev((stderr, "\ndyn trees: dyn %ld, stat %ld",
s->opt_len, s->static_len)); s->opt_len, s->static_len));
@ -869,11 +867,17 @@ void ZLIB_INTERNAL _tr_stored_block(s, buf, stored_len, last)
int last; /* one if this is the last block for a file */ int last; /* one if this is the last block for a file */
{ {
send_bits(s, (STORED_BLOCK<<1)+last, 3); /* send block type */ send_bits(s, (STORED_BLOCK<<1)+last, 3); /* send block type */
bi_windup(s); /* align on byte boundary */
put_short(s, (ush)stored_len);
put_short(s, (ush)~stored_len);
zmemcpy(s->pending_buf + s->pending, (Bytef *)buf, stored_len);
s->pending += stored_len;
#ifdef ZLIB_DEBUG #ifdef ZLIB_DEBUG
s->compressed_len = (s->compressed_len + 3 + 7) & (ulg)~7L; s->compressed_len = (s->compressed_len + 3 + 7) & (ulg)~7L;
s->compressed_len += (stored_len + 4) << 3; s->compressed_len += (stored_len + 4) << 3;
s->bits_sent += 2*16;
s->bits_sent += stored_len<<3;
#endif #endif
copy_block(s, buf, (unsigned)stored_len, 1); /* with header */
} }
/* =========================================================================== /* ===========================================================================
@ -902,7 +906,7 @@ void ZLIB_INTERNAL _tr_align(s)
/* =========================================================================== /* ===========================================================================
* Determine the best encoding for the current block: dynamic trees, static * Determine the best encoding for the current block: dynamic trees, static
* trees or store, and output the encoded block to the zip file. * trees or store, and write out the encoded block.
*/ */
void ZLIB_INTERNAL _tr_flush_block(s, buf, stored_len, last) void ZLIB_INTERNAL _tr_flush_block(s, buf, stored_len, last)
deflate_state *s; deflate_state *s;
@ -1090,7 +1094,7 @@ local void compress_block(s, ltree, dtree)
send_code(s, code, dtree); /* send the distance code */ send_code(s, code, dtree); /* send the distance code */
extra = extra_dbits[code]; extra = extra_dbits[code];
if (extra != 0) { if (extra != 0) {
dist -= base_dist[code]; dist -= (unsigned)base_dist[code];
send_bits(s, dist, extra); /* send the extra distance bits */ send_bits(s, dist, extra); /* send the extra distance bits */
} }
} /* literal or match pair ? */ } /* literal or match pair ? */
@ -1197,30 +1201,3 @@ local void bi_windup(s)
s->bits_sent = (s->bits_sent+7) & ~7; s->bits_sent = (s->bits_sent+7) & ~7;
#endif #endif
} }
/* ===========================================================================
* Copy a stored block, storing first the length and its
* one's complement if requested.
*/
local void copy_block(s, buf, len, header)
deflate_state *s;
charf *buf; /* the input data */
unsigned len; /* its length */
int header; /* true if block header must be written */
{
bi_windup(s); /* align on byte boundary */
if (header) {
put_short(s, (ush)len);
put_short(s, (ush)~len);
#ifdef ZLIB_DEBUG
s->bits_sent += 2*16;
#endif
}
#ifdef ZLIB_DEBUG
s->bits_sent += (ulg)len<<3;
#endif
while (len--) {
put_byte(s, *buf++);
}
}

41
Foundation/src/zconf.h
View File

@ -3,7 +3,7 @@
* For conditions of distribution and use, see copyright notice in zlib.h * For conditions of distribution and use, see copyright notice in zlib.h
*/ */
/* @(#) $Id: //poco/1.4/Foundation/src/zconf.h#6 $ */ /* @(#) $Id: //poco/1.4/Foundation/include/Poco/zconf.h#5 $ */
#ifndef ZCONF_H #ifndef ZCONF_H
#define ZCONF_H #define ZCONF_H
@ -17,7 +17,7 @@
#ifdef Z_PREFIX /* may be set to #if 1 by ./configure */ #ifdef Z_PREFIX /* may be set to #if 1 by ./configure */
# define Z_PREFIX_SET # define Z_PREFIX_SET
/* all linked symbols */ /* all linked symbols and init macros */
# define _dist_code z__dist_code # define _dist_code z__dist_code
# define _length_code z__length_code # define _length_code z__length_code
# define _tr_align z__tr_align # define _tr_align z__tr_align
@ -29,6 +29,7 @@
# define adler32 z_adler32 # define adler32 z_adler32
# define adler32_combine z_adler32_combine # define adler32_combine z_adler32_combine
# define adler32_combine64 z_adler32_combine64 # define adler32_combine64 z_adler32_combine64
# define adler32_z z_adler32_z
# ifndef Z_SOLO # ifndef Z_SOLO
# define compress z_compress # define compress z_compress
# define compress2 z_compress2 # define compress2 z_compress2
@ -37,10 +38,14 @@
# define crc32 z_crc32 # define crc32 z_crc32
# define crc32_combine z_crc32_combine # define crc32_combine z_crc32_combine
# define crc32_combine64 z_crc32_combine64 # define crc32_combine64 z_crc32_combine64
# define crc32_z z_crc32_z
# define deflate z_deflate # define deflate z_deflate
# define deflateBound z_deflateBound # define deflateBound z_deflateBound
# define deflateCopy z_deflateCopy # define deflateCopy z_deflateCopy
# define deflateEnd z_deflateEnd # define deflateEnd z_deflateEnd
# define deflateGetDictionary z_deflateGetDictionary
# define deflateInit z_deflateInit
# define deflateInit2 z_deflateInit2
# define deflateInit2_ z_deflateInit2_ # define deflateInit2_ z_deflateInit2_
# define deflateInit_ z_deflateInit_ # define deflateInit_ z_deflateInit_
# define deflateParams z_deflateParams # define deflateParams z_deflateParams
@ -67,6 +72,8 @@
# define gzeof z_gzeof # define gzeof z_gzeof
# define gzerror z_gzerror # define gzerror z_gzerror
# define gzflush z_gzflush # define gzflush z_gzflush
# define gzfread z_gzfread
# define gzfwrite z_gzfwrite
# define gzgetc z_gzgetc # define gzgetc z_gzgetc
# define gzgetc_ z_gzgetc_ # define gzgetc_ z_gzgetc_
# define gzgets z_gzgets # define gzgets z_gzgets
@ -78,7 +85,6 @@
# define gzopen_w z_gzopen_w # define gzopen_w z_gzopen_w
# endif # endif
# define gzprintf z_gzprintf # define gzprintf z_gzprintf
# define gzvprintf z_gzvprintf
# define gzputc z_gzputc # define gzputc z_gzputc
# define gzputs z_gzputs # define gzputs z_gzputs
# define gzread z_gzread # define gzread z_gzread
@ -89,32 +95,39 @@
# define gztell z_gztell # define gztell z_gztell
# define gztell64 z_gztell64 # define gztell64 z_gztell64
# define gzungetc z_gzungetc # define gzungetc z_gzungetc
# define gzvprintf z_gzvprintf
# define gzwrite z_gzwrite # define gzwrite z_gzwrite
# endif # endif
# define inflate z_inflate # define inflate z_inflate
# define inflateBack z_inflateBack # define inflateBack z_inflateBack
# define inflateBackEnd z_inflateBackEnd # define inflateBackEnd z_inflateBackEnd
# define inflateBackInit z_inflateBackInit
# define inflateBackInit_ z_inflateBackInit_ # define inflateBackInit_ z_inflateBackInit_
# define inflateCodesUsed z_inflateCodesUsed
# define inflateCopy z_inflateCopy # define inflateCopy z_inflateCopy
# define inflateEnd z_inflateEnd # define inflateEnd z_inflateEnd
# define inflateGetDictionary z_inflateGetDictionary
# define inflateGetHeader z_inflateGetHeader # define inflateGetHeader z_inflateGetHeader
# define inflateInit z_inflateInit
# define inflateInit2 z_inflateInit2
# define inflateInit2_ z_inflateInit2_ # define inflateInit2_ z_inflateInit2_
# define inflateInit_ z_inflateInit_ # define inflateInit_ z_inflateInit_
# define inflateMark z_inflateMark # define inflateMark z_inflateMark
# define inflatePrime z_inflatePrime # define inflatePrime z_inflatePrime
# define inflateReset z_inflateReset # define inflateReset z_inflateReset
# define inflateReset2 z_inflateReset2 # define inflateReset2 z_inflateReset2
# define inflateResetKeep z_inflateResetKeep
# define inflateSetDictionary z_inflateSetDictionary # define inflateSetDictionary z_inflateSetDictionary
# define inflateGetDictionary z_inflateGetDictionary
# define inflateSync z_inflateSync # define inflateSync z_inflateSync
# define inflateSyncPoint z_inflateSyncPoint # define inflateSyncPoint z_inflateSyncPoint
# define inflateUndermine z_inflateUndermine # define inflateUndermine z_inflateUndermine
# define inflateResetKeep z_inflateResetKeep # define inflateValidate z_inflateValidate
# define inflate_copyright z_inflate_copyright # define inflate_copyright z_inflate_copyright
# define inflate_fast z_inflate_fast # define inflate_fast z_inflate_fast
# define inflate_table z_inflate_table # define inflate_table z_inflate_table
# ifndef Z_SOLO # ifndef Z_SOLO
# define uncompress z_uncompress # define uncompress z_uncompress
# define uncompress2 z_uncompress2
# endif # endif
# define zError z_zError # define zError z_zError
# ifndef Z_SOLO # ifndef Z_SOLO
@ -224,9 +237,19 @@
# define z_const # define z_const
#endif #endif
/* Some Mac compilers merge all .h files incorrectly: */ #ifdef Z_SOLO
#if defined(__MWERKS__)||defined(applec)||defined(THINK_C)||defined(__SC__) typedef unsigned long z_size_t;
# define NO_DUMMY_DECL #else
# define z_longlong long long
# if defined(NO_SIZE_T)
typedef unsigned NO_SIZE_T z_size_t;
# elif defined(STDC)
# include <stddef.h>
typedef size_t z_size_t;
# else
typedef unsigned long z_size_t;
# endif
# undef z_longlong
#endif #endif
/* Maximum value for memLevel in deflateInit2 */ /* Maximum value for memLevel in deflateInit2 */
@ -256,7 +279,7 @@
Of course this will generally degrade compression (there's no free lunch). Of course this will generally degrade compression (there's no free lunch).
The memory requirements for inflate are (in bytes) 1 << windowBits The memory requirements for inflate are (in bytes) 1 << windowBits
that is, 32K for windowBits=15 (default value) plus a few kilobytes that is, 32K for windowBits=15 (default value) plus about 7 kilobytes
for small objects. for small objects.
*/ */

444
Foundation/src/zlib.h
View File

@ -1,7 +1,7 @@
/* zlib.h -- interface of the 'zlib' general purpose compression library /* zlib.h -- interface of the 'zlib' general purpose compression library
version 1.2.8, April 28th, 2013 version 1.2.11, January 15th, 2017
Copyright (C) 1995-2013 Jean-loup Gailly and Mark Adler Copyright (C) 1995-2017 Jean-loup Gailly and Mark Adler
This software is provided 'as-is', without any express or implied This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages warranty. In no event will the authors be held liable for any damages
@ -37,11 +37,11 @@
extern "C" { extern "C" {
#endif #endif
#define ZLIB_VERSION "1.2.8" #define ZLIB_VERSION "1.2.11"
#define ZLIB_VERNUM 0x1280 #define ZLIB_VERNUM 0x12b0
#define ZLIB_VER_MAJOR 1 #define ZLIB_VER_MAJOR 1
#define ZLIB_VER_MINOR 2 #define ZLIB_VER_MINOR 2
#define ZLIB_VER_REVISION 8 #define ZLIB_VER_REVISION 11
#define ZLIB_VER_SUBREVISION 0 #define ZLIB_VER_SUBREVISION 0
/* /*
@ -65,7 +65,8 @@ extern "C" {
with "gz". The gzip format is different from the zlib format. gzip is a with "gz". The gzip format is different from the zlib format. gzip is a
gzip wrapper, documented in RFC 1952, wrapped around a deflate stream. gzip wrapper, documented in RFC 1952, wrapped around a deflate stream.
This library can optionally read and write gzip streams in memory as well. This library can optionally read and write gzip and raw deflate streams in
memory as well.
The zlib format was designed to be compact and fast for use in memory The zlib format was designed to be compact and fast for use in memory
and on communications channels. The gzip format was designed for single- and on communications channels. The gzip format was designed for single-
@ -74,7 +75,7 @@ extern "C" {
The library does not install any signal handler. The decoder checks The library does not install any signal handler. The decoder checks
the consistency of the compressed data, so the library should never crash the consistency of the compressed data, so the library should never crash
even in case of corrupted input. even in the case of corrupted input.
*/ */
typedef voidpf (*alloc_func) OF((voidpf opaque, uInt items, uInt size)); typedef voidpf (*alloc_func) OF((voidpf opaque, uInt items, uInt size));
@ -87,7 +88,7 @@ typedef struct z_stream_s {
uInt avail_in; /* number of bytes available at next_in */ uInt avail_in; /* number of bytes available at next_in */
uLong total_in; /* total number 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 */ Bytef *next_out; /* next output byte will go here */
uInt avail_out; /* remaining free space at next_out */ uInt avail_out; /* remaining free space at next_out */
uLong total_out; /* total number of bytes output so far */ uLong total_out; /* total number of bytes output so far */
@ -98,8 +99,9 @@ typedef struct z_stream_s {
free_func zfree; /* used to free the internal state */ free_func zfree; /* used to free the internal state */
voidpf opaque; /* private data object passed to zalloc and zfree */ voidpf opaque; /* private data object passed to zalloc and zfree */
int data_type; /* best guess about the data type: binary or text */ int data_type; /* best guess about the data type: binary or text
uLong adler; /* adler32 value of the uncompressed data */ for deflate, or the decoding state for inflate */
uLong adler; /* Adler-32 or CRC-32 value of the uncompressed data */
uLong reserved; /* reserved for future use */ uLong reserved; /* reserved for future use */
} z_stream; } z_stream;
@ -142,7 +144,9 @@ typedef gz_header FAR *gz_headerp;
zalloc must return Z_NULL if there is not enough memory for the object. zalloc must return Z_NULL if there is not enough memory for the object.
If zlib is used in a multi-threaded application, zalloc and zfree must be If zlib is used in a multi-threaded application, zalloc and zfree must be
thread safe. thread safe. In that case, zlib is thread-safe. When zalloc and zfree are
Z_NULL on entry to the initialization function, they are set to internal
routines that use the standard library functions malloc() and free().
On 16-bit systems, the functions zalloc and zfree must be able to allocate On 16-bit systems, the functions zalloc and zfree must be able to allocate
exactly 65536 bytes, but will not be required to allocate more than this if exactly 65536 bytes, but will not be required to allocate more than this if
@ -155,7 +159,7 @@ typedef gz_header FAR *gz_headerp;
The fields total_in and total_out can be used for statistics or progress The fields total_in and total_out can be used for statistics or progress
reports. After compression, total_in holds the total size of the reports. After compression, total_in holds the total size of the
uncompressed data and may be saved for use in the decompressor (particularly uncompressed data and may be saved for use by the decompressor (particularly
if the decompressor wants to decompress everything in a single step). if the decompressor wants to decompress everything in a single step).
*/ */
@ -200,7 +204,7 @@ typedef gz_header FAR *gz_headerp;
#define Z_TEXT 1 #define Z_TEXT 1
#define Z_ASCII Z_TEXT /* for compatibility with 1.2.2 and earlier */ #define Z_ASCII Z_TEXT /* for compatibility with 1.2.2 and earlier */
#define Z_UNKNOWN 2 #define Z_UNKNOWN 2
/* Possible values of the data_type field (though see inflate()) */ /* Possible values of the data_type field for deflate() */
#define Z_DEFLATED 8 #define Z_DEFLATED 8
/* The deflate compression method (the only one supported in this version) */ /* The deflate compression method (the only one supported in this version) */
@ -258,11 +262,11 @@ ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));
enough room in the output buffer), next_in and avail_in are updated and enough room in the output buffer), next_in and avail_in are updated and
processing will resume at this point for the next call of deflate(). processing will resume at this point for the next call of deflate().
- Provide more output starting at next_out and update next_out and avail_out - Generate more output starting at next_out and update next_out and avail_out
accordingly. This action is forced if the parameter flush is non zero. accordingly. This action is forced if the parameter flush is non zero.
Forcing flush frequently degrades the compression ratio, so this parameter Forcing flush frequently degrades the compression ratio, so this parameter
should be set only when necessary (in interactive applications). Some should be set only when necessary. Some output may be provided even if
output may be provided even if flush is not set. flush is zero.
Before the call of deflate(), the application should ensure that at least Before the call of deflate(), the application should ensure that at least
one of the actions is possible, by providing more input and/or consuming more one of the actions is possible, by providing more input and/or consuming more
@ -271,7 +275,9 @@ ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));
output when it wants, for example when the output buffer is full (avail_out output when it wants, for example when the output buffer is full (avail_out
== 0), or after each call of deflate(). If deflate returns Z_OK and with == 0), or after each call of deflate(). If deflate returns Z_OK and with
zero avail_out, it must be called again after making room in the output zero avail_out, it must be called again after making room in the output
buffer because there might be more output pending. buffer because there might be more output pending. See deflatePending(),
which can be used if desired to determine whether or not there is more ouput
in that case.
Normally the parameter flush is set to Z_NO_FLUSH, which allows deflate to Normally the parameter flush is set to Z_NO_FLUSH, which allows deflate to
decide how much data to accumulate before producing output, in order to decide how much data to accumulate before producing output, in order to
@ -292,8 +298,8 @@ ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));
input data so far will be available to the decompressor, as for Z_SYNC_FLUSH. input data so far will be available to the decompressor, as for Z_SYNC_FLUSH.
This completes the current deflate block and follows it with an empty fixed This completes the current deflate block and follows it with an empty fixed
codes block that is 10 bits long. This assures that enough bytes are output codes block that is 10 bits long. This assures that enough bytes are output
in order for the decompressor to finish the block before the empty fixed code in order for the decompressor to finish the block before the empty fixed
block. codes block.
If flush is set to Z_BLOCK, a deflate block is completed and emitted, as If flush is set to Z_BLOCK, a deflate block is completed and emitted, as
for Z_SYNC_FLUSH, but the output is not aligned on a byte boundary, and up to for Z_SYNC_FLUSH, but the output is not aligned on a byte boundary, and up to
@ -319,34 +325,38 @@ ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));
If the parameter flush is set to Z_FINISH, pending input is processed, If the parameter flush is set to Z_FINISH, pending input is processed,
pending output is flushed and deflate returns with Z_STREAM_END if there was pending output is flushed and deflate returns with Z_STREAM_END if there was
enough output space; if deflate returns with Z_OK, this function must be enough output space. If deflate returns with Z_OK or Z_BUF_ERROR, this
called again with Z_FINISH and more output space (updated avail_out) but no function must be called again with Z_FINISH and more output space (updated
more input data, until it returns with Z_STREAM_END or an error. After avail_out) but no more input data, until it returns with Z_STREAM_END or an
deflate has returned Z_STREAM_END, the only possible operations on the stream error. After deflate has returned Z_STREAM_END, the only possible operations
are deflateReset or deflateEnd. on the stream are deflateReset or deflateEnd.
Z_FINISH can be used immediately after deflateInit if all the compression Z_FINISH can be used in the first deflate call after deflateInit if all the
is to be done in a single step. In this case, avail_out must be at least the compression is to be done in a single step. In order to complete in one
value returned by deflateBound (see below). Then deflate is guaranteed to call, avail_out must be at least the value returned by deflateBound (see
return Z_STREAM_END. If not enough output space is provided, deflate will below). Then deflate is guaranteed to return Z_STREAM_END. If not enough
not return Z_STREAM_END, and it must be called again as described above. 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 deflate() sets strm->adler to the Adler-32 checksum of all input read
so far (that is, total_in bytes). so far (that is, total_in bytes). If a gzip stream is being generated, then
strm->adler will be the CRC-32 checksum of the input read so far. (See
deflateInit2 below.)
deflate() may update strm->data_type if it can make a good guess about deflate() may update strm->data_type if it can make a good guess about
the input data type (Z_BINARY or Z_TEXT). In doubt, the data is considered the input data type (Z_BINARY or Z_TEXT). If in doubt, the data is
binary. This field is only for information purposes and does not affect the considered binary. This field is only for information purposes and does not
compression algorithm in any manner. affect the compression algorithm in any manner.
deflate() returns Z_OK if some progress has been made (more input deflate() returns Z_OK if some progress has been made (more input
processed or more output produced), Z_STREAM_END if all input has been processed or more output produced), Z_STREAM_END if all input has been
consumed and all output has been produced (only when flush is set to consumed and all output has been produced (only when flush is set to
Z_FINISH), Z_STREAM_ERROR if the stream state was inconsistent (for example Z_FINISH), Z_STREAM_ERROR if the stream state was inconsistent (for example
if next_in or next_out was Z_NULL), Z_BUF_ERROR if no progress is possible if next_in or next_out was Z_NULL or the state was inadvertently written over
(for example avail_in or avail_out was zero). Note that Z_BUF_ERROR is not by the application), or Z_BUF_ERROR if no progress is possible (for example
fatal, and deflate() can be called again with more input and more output avail_in or avail_out was zero). Note that Z_BUF_ERROR is not fatal, and
space to continue compressing. deflate() can be called again with more input and more output space to
continue compressing.
*/ */
@ -369,23 +379,21 @@ ZEXTERN int ZEXPORT inflateInit OF((z_streamp strm));
Initializes the internal stream state for decompression. The fields Initializes the internal stream state for decompression. The fields
next_in, avail_in, zalloc, zfree and opaque must be initialized before by next_in, avail_in, zalloc, zfree and opaque must be initialized before by
the caller. If next_in is not Z_NULL and avail_in is large enough (the the caller. In the current version of inflate, the provided input is not
exact value depends on the compression method), inflateInit determines the read or consumed. The allocation of a sliding window will be deferred to
compression method from the zlib header and allocates all data structures the first call of inflate (if the decompression does not complete on the
accordingly; otherwise the allocation will be deferred to the first call of first call). If zalloc and zfree are set to Z_NULL, inflateInit updates
inflate. If zalloc and zfree are set to Z_NULL, inflateInit updates them to them to use default allocation functions.
use default allocation functions.
inflateInit returns Z_OK if success, Z_MEM_ERROR if there was not enough inflateInit returns Z_OK if success, Z_MEM_ERROR if there was not enough
memory, Z_VERSION_ERROR if the zlib library version is incompatible with the memory, Z_VERSION_ERROR if the zlib library version is incompatible with the
version assumed by the caller, or Z_STREAM_ERROR if the parameters are version assumed by the caller, or Z_STREAM_ERROR if the parameters are
invalid, such as a null pointer to the structure. msg is set to null if invalid, such as a null pointer to the structure. msg is set to null if
there is no error message. inflateInit does not perform any decompression there is no error message. inflateInit does not perform any decompression.
apart from possibly reading the zlib header if present: actual decompression Actual decompression will be done by inflate(). So next_in, and avail_in,
will be done by inflate(). (So next_in and avail_in may be modified, but next_out, and avail_out are unused and unchanged. The current
next_out and avail_out are unused and unchanged.) The current implementation implementation of inflateInit() does not process any header information --
of inflateInit() does not process any header information -- that is deferred that is deferred until inflate() is called.
until inflate() is called.
*/ */
@ -401,17 +409,20 @@ ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush));
- Decompress more input starting at next_in and update next_in and avail_in - Decompress more input starting at next_in and update next_in and avail_in
accordingly. If not all input can be processed (because there is not accordingly. If not all input can be processed (because there is not
enough room in the output buffer), next_in is updated and processing will enough room in the output buffer), then next_in and avail_in are updated
resume at this point for the next call of inflate(). accordingly, and processing will resume at this point for the next call of
inflate().
- Provide more output starting at next_out and update next_out and avail_out - Generate more output starting at next_out and update next_out and avail_out
accordingly. inflate() provides as much output as possible, until there is accordingly. inflate() provides as much output as possible, until there is
no more input data or no more space in the output buffer (see below about no more input data or no more space in the output buffer (see below about
the flush parameter). the flush parameter).
Before the call of inflate(), the application should ensure that at least Before the call of inflate(), the application should ensure that at least
one of the actions is possible, by providing more input and/or consuming more one of the actions is possible, by providing more input and/or consuming more
output, and updating the next_* and avail_* values accordingly. The output, and updating the next_* and avail_* values accordingly. If the
caller of inflate() does not provide both available input and available
output space, it is possible that there will be no progress made. The
application can consume the uncompressed output when it wants, for example application can consume the uncompressed output when it wants, for example
when the output buffer is full (avail_out == 0), or after each call of when the output buffer is full (avail_out == 0), or after each call of
inflate(). If inflate returns Z_OK and with zero avail_out, it must be inflate(). If inflate returns Z_OK and with zero avail_out, it must be
@ -428,7 +439,7 @@ ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush));
gets to the end of that block, or when it runs out of data. gets to the end of that block, or when it runs out of data.
The Z_BLOCK option assists in appending to or combining deflate streams. The Z_BLOCK option assists in appending to or combining deflate streams.
Also to assist in this, on return inflate() will set strm->data_type to the To assist in this, on return inflate() always sets strm->data_type to the
number of unused bits in the last byte taken from strm->next_in, plus 64 if number of unused bits in the last byte taken from strm->next_in, plus 64 if
inflate() is currently decoding the last block in the deflate stream, plus inflate() is currently decoding the last block in the deflate stream, plus
128 if inflate() returned immediately after decoding an end-of-block code or 128 if inflate() returned immediately after decoding an end-of-block code or
@ -454,7 +465,7 @@ ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush));
this case all pending input is processed and all pending output is flushed; this case all pending input is processed and all pending output is flushed;
avail_out must be large enough to hold all of the uncompressed data for the avail_out must be large enough to hold all of the uncompressed data for the
operation to complete. (The size of the uncompressed data may have been operation to complete. (The size of the uncompressed data may have been
saved by the compressor for this purpose.) The use of Z_FINISH is not saved by the compressor for this purpose.) The use of Z_FINISH is not
required to perform an inflation in one step. However it may be used to 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() 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 call. Z_FINISH also informs inflate to not maintain a sliding window if the
@ -476,32 +487,33 @@ ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush));
chosen by the compressor and returns Z_NEED_DICT; otherwise it sets chosen by the compressor and returns Z_NEED_DICT; otherwise it sets
strm->adler to the Adler-32 checksum of all output produced so far (that is, 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 total_out bytes) and returns Z_OK, Z_STREAM_END or an error code as described
below. At the end of the stream, inflate() checks that its computed adler32 below. At the end of the stream, inflate() checks that its computed Adler-32
checksum is equal to that saved by the compressor and returns Z_STREAM_END checksum is equal to that saved by the compressor and returns Z_STREAM_END
only if the checksum is correct. only if the checksum is correct.
inflate() can decompress and check either zlib-wrapped or gzip-wrapped inflate() can decompress and check either zlib-wrapped or gzip-wrapped
deflate data. The header type is detected automatically, if requested when deflate data. The header type is detected automatically, if requested when
initializing with inflateInit2(). Any information contained in the gzip initializing with inflateInit2(). Any information contained in the gzip
header is not retained, so applications that need that information should header is not retained unless inflateGetHeader() is used. When processing
instead use raw inflate, see inflateInit2() below, or inflateBack() and
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 gzip-wrapped deflate data, strm->adler32 is set to the CRC-32 of the output
producted so far. The CRC-32 is checked against the gzip trailer. produced so far. The CRC-32 is checked against the gzip trailer, as is the
uncompressed length, modulo 2^32.
inflate() returns Z_OK if some progress has been made (more input processed 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 or more output produced), Z_STREAM_END if the end of the compressed data has
been reached and all uncompressed output has been produced, Z_NEED_DICT if a been reached and all uncompressed output has been produced, Z_NEED_DICT if a
preset dictionary is needed at this point, Z_DATA_ERROR if the input data was preset dictionary is needed at this point, Z_DATA_ERROR if the input data was
corrupted (input stream not conforming to the zlib format or incorrect check corrupted (input stream not conforming to the zlib format or incorrect check
value), Z_STREAM_ERROR if the stream structure was inconsistent (for example value, in which case strm->msg points to a string with a more specific
next_in or next_out was Z_NULL), Z_MEM_ERROR if there was not enough memory, error), Z_STREAM_ERROR if the stream structure was inconsistent (for example
Z_BUF_ERROR if no progress is possible or if there was not enough room in the next_in or next_out was Z_NULL, or the state was inadvertently written over
output buffer when Z_FINISH is used. Note that Z_BUF_ERROR is not fatal, and by the application), Z_MEM_ERROR if there was not enough memory, Z_BUF_ERROR
if no progress was possible or if there was not enough room in the output
buffer when Z_FINISH is used. Note that Z_BUF_ERROR is not fatal, and
inflate() can be called again with more input and more output space to inflate() can be called again with more input and more output space to
continue decompressing. If Z_DATA_ERROR is returned, the application may continue decompressing. If Z_DATA_ERROR is returned, the application may
then call inflateSync() to look for a good compression block if a partial then call inflateSync() to look for a good compression block if a partial
recovery of the data is desired. recovery of the data is to be attempted.
*/ */
@ -511,9 +523,8 @@ ZEXTERN int ZEXPORT inflateEnd OF((z_streamp strm));
This function discards any unprocessed input and does not flush any pending This function discards any unprocessed input and does not flush any pending
output. output.
inflateEnd returns Z_OK if success, Z_STREAM_ERROR if the stream state inflateEnd returns Z_OK if success, or Z_STREAM_ERROR if the stream state
was inconsistent. In the error case, msg may be set but then points to a was inconsistent.
static string (which must not be deallocated).
*/ */
@ -544,16 +555,29 @@ ZEXTERN int ZEXPORT deflateInit2 OF((z_streamp strm,
compression at the expense of memory usage. The default value is 15 if compression at the expense of memory usage. The default value is 15 if
deflateInit is used instead. deflateInit is used instead.
For the current implementation of deflate(), a windowBits value of 8 (a
window size of 256 bytes) is not supported. As a result, a request for 8
will result in 9 (a 512-byte window). In that case, providing 8 to
inflateInit2() will result in an error when the zlib header with 9 is
checked against the initialization of inflate(). The remedy is to not use 8
with deflateInit2() with this initialization, or at least in that case use 9
with inflateInit2().
windowBits can also be -8..-15 for raw deflate. In this case, -windowBits windowBits can also be -8..-15 for raw deflate. In this case, -windowBits
determines the window size. deflate() will then generate raw deflate data determines the window size. deflate() will then generate raw deflate data
with no zlib header or trailer, and will not compute an adler32 check value. with no zlib header or trailer, and will not compute a check value.
windowBits can also be greater than 15 for optional gzip encoding. Add windowBits can also be greater than 15 for optional gzip encoding. Add
16 to windowBits to write a simple gzip header and trailer around the 16 to windowBits to write a simple gzip header and trailer around the
compressed data instead of a zlib wrapper. The gzip header will have no compressed data instead of a zlib wrapper. The gzip header will have no
file name, no extra data, no comment, no modification time (set to zero), no file name, no extra data, no comment, no modification time (set to zero), no
header crc, and the operating system will be set to 255 (unknown). If a header crc, and the operating system will be set to the appropriate value,
gzip stream is being written, strm->adler is a crc32 instead of an adler32. if the operating system was determined at compile time. If a gzip stream is
being written, strm->adler is a CRC-32 instead of an Adler-32.
For raw deflate or gzip encoding, a request for a 256-byte window is
rejected as invalid, since only the zlib header provides a means of
transmitting the window size to the decompressor.
The memLevel parameter specifies how much memory should be allocated The memLevel parameter specifies how much memory should be allocated
for the internal compression state. memLevel=1 uses minimum memory but is for the internal compression state. memLevel=1 uses minimum memory but is
@ -614,12 +638,12 @@ ZEXTERN int ZEXPORT deflateSetDictionary OF((z_streamp strm,
addition, the current implementation of deflate will use at most the window addition, the current implementation of deflate will use at most the window
size minus 262 bytes of the provided dictionary. size minus 262 bytes of the provided dictionary.
Upon return of this function, strm->adler is set to the adler32 value Upon return of this function, strm->adler is set to the Adler-32 value
of the dictionary; the decompressor may later use this value to determine of the dictionary; the decompressor may later use this value to determine
which dictionary has been used by the compressor. (The adler32 value which dictionary has been used by the compressor. (The Adler-32 value
applies to the whole dictionary even if only a subset of the dictionary is applies to the whole dictionary even if only a subset of the dictionary is
actually used by the compressor.) If a raw deflate was requested, then the actually used by the compressor.) If a raw deflate was requested, then the
adler32 value is not computed and strm->adler is not set. Adler-32 value is not computed and strm->adler is not set.
deflateSetDictionary returns Z_OK if success, or Z_STREAM_ERROR if a 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 parameter is invalid (e.g. dictionary being Z_NULL) or the stream state is
@ -628,6 +652,28 @@ ZEXTERN int ZEXPORT deflateSetDictionary OF((z_streamp strm,
not perform any compression: this will be done by deflate(). not perform any compression: this will be done by deflate().
*/ */
ZEXTERN int ZEXPORT deflateGetDictionary OF((z_streamp strm,
Bytef *dictionary,
uInt *dictLength));
/*
Returns the sliding dictionary being maintained by deflate. dictLength is
set to the number of bytes in the dictionary, and that many bytes are copied
to dictionary. dictionary must have enough space, where 32768 bytes is
always enough. If deflateGetDictionary() is called with dictionary equal to
Z_NULL, then only the dictionary length is returned, and nothing is copied.
Similary, if dictLength is Z_NULL, then it is not set.
deflateGetDictionary() may return a length less than the window size, even
when more than the window size in input has been provided. It may return up
to 258 bytes less in that case, due to how zlib's implementation of deflate
manages the sliding window and lookahead for matches, where matches can be
up to 258 bytes long. If the application needs the last window-size bytes of
input, then that would need to be saved by the application outside of zlib.
deflateGetDictionary returns Z_OK on success, or Z_STREAM_ERROR if the
stream state is inconsistent.
*/
ZEXTERN int ZEXPORT deflateCopy OF((z_streamp dest, ZEXTERN int ZEXPORT deflateCopy OF((z_streamp dest,
z_streamp source)); z_streamp source));
/* /*
@ -648,10 +694,10 @@ ZEXTERN int ZEXPORT deflateCopy OF((z_streamp dest,
ZEXTERN int ZEXPORT deflateReset OF((z_streamp strm)); ZEXTERN int ZEXPORT deflateReset OF((z_streamp strm));
/* /*
This function is equivalent to deflateEnd followed by deflateInit, This function is equivalent to deflateEnd followed by deflateInit, but
but does not free and reallocate all the internal compression state. The does not free and reallocate the internal compression state. The stream
stream will keep the same compression level and any other attributes that will leave the compression level and any other attributes that may have been
may have been set by deflateInit2. set unchanged.
deflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source deflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source
stream state was inconsistent (such as zalloc or state being Z_NULL). stream state was inconsistent (such as zalloc or state being Z_NULL).
@ -662,20 +708,36 @@ ZEXTERN int ZEXPORT deflateParams OF((z_streamp strm,
int strategy)); int strategy));
/* /*
Dynamically update the compression level and compression strategy. The Dynamically update the compression level and compression strategy. The
interpretation of level and strategy is as in deflateInit2. This can be interpretation of level and strategy is as in deflateInit2(). This can be
used to switch between compression and straight copy of the input data, or used to switch between compression and straight copy of the input data, or
to switch to a different kind of input data requiring a different strategy. to switch to a different kind of input data requiring a different strategy.
If the compression level is changed, the input available so far is If the compression approach (which is a function of the level) or the
compressed with the old level (and may be flushed); the new level will take strategy is changed, and if any input has been consumed in a previous
effect only at the next call of deflate(). deflate() call, then the input available so far is compressed with the old
level and strategy using deflate(strm, Z_BLOCK). There are three approaches
for the compression levels 0, 1..3, and 4..9 respectively. The new level
and strategy will take effect at the next call of deflate().
Before the call of deflateParams, the stream state must be set as for If a deflate(strm, Z_BLOCK) is performed by deflateParams(), and it does
a call of deflate(), since the currently available input may have to be not have enough output space to complete, then the parameter change will not
compressed and flushed. In particular, strm->avail_out must be non-zero. take effect. In this case, deflateParams() can be called again with the
same parameters and more output space to try again.
deflateParams returns Z_OK if success, Z_STREAM_ERROR if the source In order to assure a change in the parameters on the first try, the
stream state was inconsistent or if a parameter was invalid, Z_BUF_ERROR if deflate stream should be flushed using deflate() with Z_BLOCK or other flush
strm->avail_out was zero. request until strm.avail_out is not zero, before calling deflateParams().
Then no more input data should be provided before the deflateParams() call.
If this is done, the old level and strategy will be applied to the data
compressed before deflateParams(), and the new level and strategy will be
applied to the the data compressed after deflateParams().
deflateParams returns Z_OK on success, Z_STREAM_ERROR if the source stream
state was inconsistent or if a parameter was invalid, or Z_BUF_ERROR if
there was not enough output space to complete the compression of the
available input data before a change in the strategy or approach. Note that
in the case of a Z_BUF_ERROR, the parameters are not changed. A return
value of Z_BUF_ERROR is not fatal, in which case deflateParams() can be
retried with more output space.
*/ */
ZEXTERN int ZEXPORT deflateTune OF((z_streamp strm, ZEXTERN int ZEXPORT deflateTune OF((z_streamp strm,
@ -793,7 +855,7 @@ ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm,
is for use with other formats that use the deflate compressed data format is for use with other formats that use the deflate compressed data format
such as zip. Those formats provide their own check values. If a custom such as zip. Those formats provide their own check values. If a custom
format is developed using the raw deflate format for compressed data, it is format is developed using the raw deflate format for compressed data, it is
recommended that a check value such as an adler32 or a crc32 be applied to recommended that a check value such as an Adler-32 or a CRC-32 be applied to
the uncompressed data as is done in the zlib, gzip, and zip formats. For the uncompressed data as is done in the zlib, gzip, and zip formats. For
most applications, the zlib format should be used as is. Note that comments most applications, the zlib format should be used as is. Note that comments
above on the use in deflateInit2() applies to the magnitude of windowBits. above on the use in deflateInit2() applies to the magnitude of windowBits.
@ -802,7 +864,10 @@ ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm,
32 to windowBits to enable zlib and gzip decoding with automatic header 32 to windowBits to enable zlib and gzip decoding with automatic header
detection, or add 16 to decode only the gzip format (the zlib format will detection, or add 16 to decode only the gzip format (the zlib format will
return a Z_DATA_ERROR). If a gzip stream is being decoded, strm->adler is a return a Z_DATA_ERROR). If a gzip stream is being decoded, strm->adler is a
crc32 instead of an adler32. CRC-32 instead of an Adler-32. Unlike the gunzip utility and gzread() (see
below), inflate() will not automatically decode concatenated gzip streams.
inflate() will return Z_STREAM_END at the end of the gzip stream. The state
would need to be reset to continue decoding a subsequent gzip stream.
inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
memory, Z_VERSION_ERROR if the zlib library version is incompatible with the memory, Z_VERSION_ERROR if the zlib library version is incompatible with the
@ -823,7 +888,7 @@ ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp strm,
Initializes the decompression dictionary from the given uncompressed byte Initializes the decompression dictionary from the given uncompressed byte
sequence. This function must be called immediately after a call of inflate, sequence. This function must be called immediately after a call of inflate,
if that call returned Z_NEED_DICT. The dictionary chosen by the compressor if that call returned Z_NEED_DICT. The dictionary chosen by the compressor
can be determined from the adler32 value returned by that call of inflate. can be determined from the Adler-32 value returned by that call of inflate.
The compressor and decompressor must use exactly the same dictionary (see The compressor and decompressor must use exactly the same dictionary (see
deflateSetDictionary). For raw inflate, this function can be called at any deflateSetDictionary). For raw inflate, this function can be called at any
time to set the dictionary. If the provided dictionary is smaller than the time to set the dictionary. If the provided dictionary is smaller than the
@ -834,7 +899,7 @@ ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp strm,
inflateSetDictionary returns Z_OK if success, Z_STREAM_ERROR if a 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 parameter is invalid (e.g. dictionary being Z_NULL) or the stream state is
inconsistent, Z_DATA_ERROR if the given dictionary doesn't match the inconsistent, Z_DATA_ERROR if the given dictionary doesn't match the
expected one (incorrect adler32 value). inflateSetDictionary does not expected one (incorrect Adler-32 value). inflateSetDictionary does not
perform any decompression: this will be done by subsequent calls of perform any decompression: this will be done by subsequent calls of
inflate(). inflate().
*/ */
@ -892,7 +957,7 @@ ZEXTERN int ZEXPORT inflateCopy OF((z_streamp dest,
ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm)); ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm));
/* /*
This function is equivalent to inflateEnd followed by inflateInit, This function is equivalent to inflateEnd followed by inflateInit,
but does not free and reallocate all the internal decompression state. The but does not free and reallocate the internal decompression state. The
stream will keep attributes that may have been set by inflateInit2. stream will keep attributes that may have been set by inflateInit2.
inflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source inflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source
@ -904,7 +969,9 @@ ZEXTERN int ZEXPORT inflateReset2 OF((z_streamp strm,
/* /*
This function is the same as inflateReset, but it also permits changing This function is the same as inflateReset, but it also permits changing
the wrap and window size requests. The windowBits parameter is interpreted the wrap and window size requests. The windowBits parameter is interpreted
the same as it is for inflateInit2. the same as it is for inflateInit2. If the window size is changed, then the
memory allocated for the window is freed, and the window will be reallocated
by inflate() if needed.
inflateReset2 returns Z_OK if success, or Z_STREAM_ERROR if the source inflateReset2 returns Z_OK if success, or Z_STREAM_ERROR if the source
stream state was inconsistent (such as zalloc or state being Z_NULL), or if stream state was inconsistent (such as zalloc or state being Z_NULL), or if
@ -956,7 +1023,7 @@ ZEXTERN long ZEXPORT inflateMark OF((z_streamp strm));
location in the input stream can be determined from avail_in and data_type location in the input stream can be determined from avail_in and data_type
as noted in the description for the Z_BLOCK flush parameter for inflate. as noted in the description for the Z_BLOCK flush parameter for inflate.
inflateMark returns the value noted above or -1 << 16 if the provided inflateMark returns the value noted above, or -65536 if the provided
source stream state was inconsistent. source stream state was inconsistent.
*/ */
@ -1048,9 +1115,9 @@ ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm,
This routine would normally be used in a utility that reads zip or gzip This routine would normally be used in a utility that reads zip or gzip
files and writes out uncompressed files. The utility would decode the files and writes out uncompressed files. The utility would decode the
header and process the trailer on its own, hence this routine expects only header and process the trailer on its own, hence this routine expects only
the raw deflate stream to decompress. This is different from the normal the raw deflate stream to decompress. This is different from the default
behavior of inflate(), which expects either a zlib or gzip header and behavior of inflate(), which expects a zlib header and trailer around the
trailer around the deflate stream. deflate stream.
inflateBack() uses two subroutines supplied by the caller that are then inflateBack() uses two subroutines supplied by the caller that are then
called by inflateBack() for input and output. inflateBack() calls those called by inflateBack() for input and output. inflateBack() calls those
@ -1059,12 +1126,12 @@ ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm,
parameters and return types are defined above in the in_func and out_func parameters and return types are defined above in the in_func and out_func
typedefs. inflateBack() will call in(in_desc, &buf) which should return the typedefs. inflateBack() will call in(in_desc, &buf) which should return the
number of bytes of provided input, and a pointer to that input in buf. If number of bytes of provided input, and a pointer to that input in buf. If
there is no input available, in() must return zero--buf is ignored in that there is no input available, in() must return zero -- buf is ignored in that
case--and inflateBack() will return a buffer error. inflateBack() will call case -- and inflateBack() will return a buffer error. inflateBack() will
out(out_desc, buf, len) to write the uncompressed data buf[0..len-1]. out() call out(out_desc, buf, len) to write the uncompressed data buf[0..len-1].
should return zero on success, or non-zero on failure. If out() returns out() should return zero on success, or non-zero on failure. If out()
non-zero, inflateBack() will return with an error. Neither in() nor out() returns non-zero, inflateBack() will return with an error. Neither in() nor
are permitted to change the contents of the window provided to out() are permitted to change the contents of the window provided to
inflateBackInit(), which is also the buffer that out() uses to write from. inflateBackInit(), which is also the buffer that out() uses to write from.
The length written by out() will be at most the window size. Any non-zero The length written by out() will be at most the window size. Any non-zero
amount of input may be provided by in(). amount of input may be provided by in().
@ -1092,7 +1159,7 @@ ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm,
using strm->next_in which will be Z_NULL only if in() returned an error. If using strm->next_in which will be Z_NULL only if in() returned an error. If
strm->next_in is not Z_NULL, then the Z_BUF_ERROR was due to out() returning strm->next_in is not Z_NULL, then the Z_BUF_ERROR was due to out() returning
non-zero. (in() will always be called before out(), so strm->next_in is non-zero. (in() will always be called before out(), so strm->next_in is
assured to be defined if out() returns non-zero.) Note that inflateBack() assured to be defined if out() returns non-zero.) Note that inflateBack()
cannot return Z_OK. cannot return Z_OK.
*/ */
@ -1114,7 +1181,7 @@ ZEXTERN uLong ZEXPORT zlibCompileFlags OF((void));
7.6: size of z_off_t 7.6: size of z_off_t
Compiler, assembler, and debug options: Compiler, assembler, and debug options:
8: DEBUG 8: ZLIB_DEBUG
9: ASMV or ASMINF -- use ASM code 9: ASMV or ASMINF -- use ASM code
10: ZLIB_WINAPI -- exported functions use the WINAPI calling convention 10: ZLIB_WINAPI -- exported functions use the WINAPI calling convention
11: 0 (reserved) 11: 0 (reserved)
@ -1164,7 +1231,8 @@ ZEXTERN int ZEXPORT compress OF((Bytef *dest, uLongf *destLen,
the byte length of the source buffer. Upon entry, destLen is the total size the byte length of the source buffer. Upon entry, destLen is the total size
of the destination buffer, which must be at least the value returned by of the destination buffer, which must be at least the value returned by
compressBound(sourceLen). Upon exit, destLen is the actual size of the compressBound(sourceLen). Upon exit, destLen is the actual size of the
compressed buffer. compressed data. compress() is equivalent to compress2() with a level
parameter of Z_DEFAULT_COMPRESSION.
compress returns Z_OK if success, Z_MEM_ERROR if there was not compress returns Z_OK if success, Z_MEM_ERROR if there was not
enough memory, Z_BUF_ERROR if there was not enough room in the output enough memory, Z_BUF_ERROR if there was not enough room in the output
@ -1180,7 +1248,7 @@ ZEXTERN int ZEXPORT compress2 OF((Bytef *dest, uLongf *destLen,
length of the source buffer. Upon entry, destLen is the total size of the length of the source buffer. Upon entry, destLen is the total size of the
destination buffer, which must be at least the value returned by destination buffer, which must be at least the value returned by
compressBound(sourceLen). Upon exit, destLen is the actual size of the compressBound(sourceLen). Upon exit, destLen is the actual size of the
compressed buffer. compressed data.
compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
memory, Z_BUF_ERROR if there was not enough room in the output buffer, memory, Z_BUF_ERROR if there was not enough room in the output buffer,
@ -1203,7 +1271,7 @@ ZEXTERN int ZEXPORT uncompress OF((Bytef *dest, uLongf *destLen,
uncompressed data. (The size of the uncompressed data must have been saved uncompressed data. (The size of the uncompressed data must have been saved
previously by the compressor and transmitted to the decompressor by some previously by the compressor and transmitted to the decompressor by some
mechanism outside the scope of this compression library.) Upon exit, destLen mechanism outside the scope of this compression library.) Upon exit, destLen
is the actual size of the uncompressed buffer. is the actual size of the uncompressed data.
uncompress returns Z_OK if success, Z_MEM_ERROR if there was not 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 enough memory, Z_BUF_ERROR if there was not enough room in the output
@ -1212,6 +1280,14 @@ ZEXTERN int ZEXPORT uncompress OF((Bytef *dest, uLongf *destLen,
buffer with the uncompressed data up to that point. buffer with the uncompressed data up to that point.
*/ */
ZEXTERN int ZEXPORT uncompress2 OF((Bytef *dest, uLongf *destLen,
const Bytef *source, uLong *sourceLen));
/*
Same as uncompress, except that sourceLen is a pointer, where the
length of the source is *sourceLen. On return, *sourceLen is the number of
source bytes consumed.
*/
/* gzip file access functions */ /* gzip file access functions */
/* /*
@ -1290,10 +1366,9 @@ ZEXTERN int ZEXPORT gzbuffer OF((gzFile file, unsigned size));
default buffer size is 8192 bytes. This function must be called after default buffer size is 8192 bytes. This function must be called after
gzopen() or gzdopen(), and before any other calls that read or write the gzopen() or gzdopen(), and before any other calls that read or write the
file. The buffer memory allocation is always deferred to the first read or file. The buffer memory allocation is always deferred to the first read or
write. Two buffers are allocated, either both of the specified size when write. Three times that size in buffer space is allocated. A larger buffer
writing, or one of the specified size and the other twice that size when size of, for example, 64K or 128K bytes will noticeably increase the speed
reading. A larger buffer size of, for example, 64K or 128K bytes will of decompression (reading).
noticeably increase the speed of decompression (reading).
The new buffer size also affects the maximum length for gzprintf(). The new buffer size also affects the maximum length for gzprintf().
@ -1304,10 +1379,12 @@ ZEXTERN int ZEXPORT gzbuffer OF((gzFile file, unsigned size));
ZEXTERN int ZEXPORT gzsetparams OF((gzFile file, int level, int strategy)); ZEXTERN int ZEXPORT gzsetparams OF((gzFile file, int level, int strategy));
/* /*
Dynamically update the compression level or strategy. See the description Dynamically update the compression level or strategy. See the description
of deflateInit2 for the meaning of these parameters. of deflateInit2 for the meaning of these parameters. Previously provided
data is flushed before the parameter change.
gzsetparams returns Z_OK if success, or Z_STREAM_ERROR if the file was not gzsetparams returns Z_OK if success, Z_STREAM_ERROR if the file was not
opened for writing. opened for writing, Z_ERRNO if there is an error writing the flushed data,
or Z_MEM_ERROR if there is a memory allocation error.
*/ */
ZEXTERN int ZEXPORT gzread OF((gzFile file, voidp buf, unsigned len)); ZEXTERN int ZEXPORT gzread OF((gzFile file, voidp buf, unsigned len));
@ -1335,7 +1412,35 @@ ZEXTERN int ZEXPORT gzread OF((gzFile file, voidp buf, unsigned len));
case. case.
gzread returns the number of uncompressed bytes actually read, less than gzread returns the number of uncompressed bytes actually read, less than
len for end of file, or -1 for error. len for end of file, or -1 for error. If len is too large to fit in an int,
then nothing is read, -1 is returned, and the error state is set to
Z_STREAM_ERROR.
*/
ZEXTERN z_size_t ZEXPORT gzfread OF((voidp buf, z_size_t size, z_size_t nitems,
gzFile file));
/*
Read up to nitems items of size size from file to buf, otherwise operating
as gzread() does. This duplicates the interface of stdio's fread(), with
size_t request and return types. If the library defines size_t, then
z_size_t is identical to size_t. If not, then z_size_t is an unsigned
integer type that can contain a pointer.
gzfread() returns the number of full items read of size size, or zero if
the end of the file was reached and a full item could not be read, or if
there was an error. gzerror() must be consulted if zero is returned in
order to determine if there was an error. If the multiplication of size and
nitems overflows, i.e. the product does not fit in a z_size_t, then nothing
is read, zero is returned, and the error state is set to Z_STREAM_ERROR.
In the event that the end of file is reached and only a partial item is
available at the end, i.e. the remaining uncompressed data length is not a
multiple of size, then the final partial item is nevetheless read into buf
and the end-of-file flag is set. The length of the partial item read is not
provided, but could be inferred from the result of gztell(). This behavior
is the same as the behavior of fread() implementations in common libraries,
but it prevents the direct use of gzfread() to read a concurrently written
file, reseting and retrying on end-of-file, when size is not 1.
*/ */
ZEXTERN int ZEXPORT gzwrite OF((gzFile file, ZEXTERN int ZEXPORT gzwrite OF((gzFile file,
@ -1346,19 +1451,33 @@ ZEXTERN int ZEXPORT gzwrite OF((gzFile file,
error. error.
*/ */
ZEXTERN z_size_t ZEXPORT gzfwrite OF((voidpc buf, z_size_t size,
z_size_t nitems, gzFile file));
/*
gzfwrite() writes nitems items of size size from buf to file, duplicating
the interface of stdio's fwrite(), with size_t request and return types. If
the library defines size_t, then z_size_t is identical to size_t. If not,
then z_size_t is an unsigned integer type that can contain a pointer.
gzfwrite() returns the number of full items written of size size, or zero
if there was an error. If the multiplication of size and nitems overflows,
i.e. the product does not fit in a z_size_t, then nothing is written, zero
is returned, and the error state is set to Z_STREAM_ERROR.
*/
ZEXTERN int ZEXPORTVA gzprintf Z_ARG((gzFile file, const char *format, ...)); ZEXTERN int ZEXPORTVA gzprintf Z_ARG((gzFile file, const char *format, ...));
/* /*
Converts, formats, and writes the arguments to the compressed file under Converts, formats, and writes the arguments to the compressed file under
control of the format string, as in fprintf. gzprintf returns the number of control of the format string, as in fprintf. gzprintf returns the number of
uncompressed bytes actually written, or 0 in case of error. The number of uncompressed bytes actually written, or a negative zlib error code in case
uncompressed bytes written is limited to 8191, or one less than the buffer of error. The number of uncompressed bytes written is limited to 8191, or
size given to gzbuffer(). The caller should assure that this limit is not one less than the buffer size given to gzbuffer(). The caller should assure
exceeded. If it is exceeded, then gzprintf() will return an error (0) with that this limit is not exceeded. If it is exceeded, then gzprintf() will
nothing written. In this case, there may also be a buffer overflow with return an error (0) with nothing written. In this case, there may also be a
unpredictable consequences, which is possible only if zlib was compiled with buffer overflow with unpredictable consequences, which is possible only if
the insecure functions sprintf() or vsprintf() because the secure snprintf() zlib was compiled with the insecure functions sprintf() or vsprintf()
or vsnprintf() functions were not available. This can be determined using because the secure snprintf() or vsnprintf() functions were not available.
zlibCompileFlags(). This can be determined using zlibCompileFlags().
*/ */
ZEXTERN int ZEXPORT gzputs OF((gzFile file, const char *s)); ZEXTERN int ZEXPORT gzputs OF((gzFile file, const char *s));
@ -1418,7 +1537,7 @@ ZEXTERN int ZEXPORT gzflush OF((gzFile file, int flush));
If the flush parameter is Z_FINISH, the remaining data is written and the If the flush parameter is Z_FINISH, the remaining data is written and the
gzip stream is completed in the output. If gzwrite() is called again, a new gzip stream is completed in the output. If gzwrite() is called again, a new
gzip stream will be started in the output. gzread() is able to read such gzip stream will be started in the output. gzread() is able to read such
concatented gzip streams. concatenated gzip streams.
gzflush should be called only when strictly necessary because it will gzflush should be called only when strictly necessary because it will
degrade compression if called too often. degrade compression if called too often.
@ -1572,7 +1691,7 @@ ZEXTERN uLong ZEXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len));
return the updated checksum. If buf is Z_NULL, this function returns the return the updated checksum. If buf is Z_NULL, this function returns the
required initial value for the checksum. required initial value for the checksum.
An Adler-32 checksum is almost as reliable as a CRC32 but can be computed An Adler-32 checksum is almost as reliable as a CRC-32 but can be computed
much faster. much faster.
Usage example: Usage example:
@ -1585,6 +1704,12 @@ ZEXTERN uLong ZEXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len));
if (adler != original_adler) error(); if (adler != original_adler) error();
*/ */
ZEXTERN uLong ZEXPORT adler32_z OF((uLong adler, const Bytef *buf,
z_size_t len));
/*
Same as adler32(), but with a size_t length.
*/
/* /*
ZEXTERN uLong ZEXPORT adler32_combine OF((uLong adler1, uLong adler2, ZEXTERN uLong ZEXPORT adler32_combine OF((uLong adler1, uLong adler2,
z_off_t len2)); z_off_t len2));
@ -1614,6 +1739,12 @@ ZEXTERN uLong ZEXPORT crc32 OF((uLong crc, const Bytef *buf, uInt len));
if (crc != original_crc) error(); if (crc != original_crc) error();
*/ */
ZEXTERN uLong ZEXPORT crc32_z OF((uLong adler, const Bytef *buf,
z_size_t len));
/*
Same as crc32(), but with a size_t length.
*/
/* /*
ZEXTERN uLong ZEXPORT crc32_combine OF((uLong crc1, uLong crc2, z_off_t len2)); ZEXTERN uLong ZEXPORT crc32_combine OF((uLong crc1, uLong crc2, z_off_t len2));
@ -1644,19 +1775,35 @@ ZEXTERN int ZEXPORT inflateBackInit_ OF((z_streamp strm, int windowBits,
unsigned char FAR *window, unsigned char FAR *window,
const char *version, const char *version,
int stream_size)); int stream_size));
#define deflateInit(strm, level) \ #ifdef Z_PREFIX_SET
deflateInit_((strm), (level), ZLIB_VERSION, (int)sizeof(z_stream)) # define z_deflateInit(strm, level) \
#define inflateInit(strm) \ deflateInit_((strm), (level), ZLIB_VERSION, (int)sizeof(z_stream))
inflateInit_((strm), ZLIB_VERSION, (int)sizeof(z_stream)) # define z_inflateInit(strm) \
#define deflateInit2(strm, level, method, windowBits, memLevel, strategy) \ inflateInit_((strm), ZLIB_VERSION, (int)sizeof(z_stream))
deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\ # define z_deflateInit2(strm, level, method, windowBits, memLevel, strategy) \
(strategy), ZLIB_VERSION, (int)sizeof(z_stream)) deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\
#define inflateInit2(strm, windowBits) \ (strategy), ZLIB_VERSION, (int)sizeof(z_stream))
inflateInit2_((strm), (windowBits), ZLIB_VERSION, \ # define z_inflateInit2(strm, windowBits) \
(int)sizeof(z_stream)) inflateInit2_((strm), (windowBits), ZLIB_VERSION, \
#define inflateBackInit(strm, windowBits, window) \ (int)sizeof(z_stream))
inflateBackInit_((strm), (windowBits), (window), \ # define z_inflateBackInit(strm, windowBits, window) \
ZLIB_VERSION, (int)sizeof(z_stream)) inflateBackInit_((strm), (windowBits), (window), \
ZLIB_VERSION, (int)sizeof(z_stream))
#else
# define deflateInit(strm, level) \
deflateInit_((strm), (level), ZLIB_VERSION, (int)sizeof(z_stream))
# define inflateInit(strm) \
inflateInit_((strm), ZLIB_VERSION, (int)sizeof(z_stream))
# define deflateInit2(strm, level, method, windowBits, memLevel, strategy) \
deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\
(strategy), ZLIB_VERSION, (int)sizeof(z_stream))
# define inflateInit2(strm, windowBits) \
inflateInit2_((strm), (windowBits), ZLIB_VERSION, \
(int)sizeof(z_stream))
# define inflateBackInit(strm, windowBits, window) \
inflateBackInit_((strm), (windowBits), (window), \
ZLIB_VERSION, (int)sizeof(z_stream))
#endif
#ifndef Z_SOLO #ifndef Z_SOLO
@ -1676,10 +1823,10 @@ ZEXTERN int ZEXPORT gzgetc_ OF((gzFile file)); /* backward compatibility */
#ifdef Z_PREFIX_SET #ifdef Z_PREFIX_SET
# undef z_gzgetc # undef z_gzgetc
# define z_gzgetc(g) \ # define z_gzgetc(g) \
((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) : gzgetc(g)) ((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) : (gzgetc)(g))
#else #else
# define gzgetc(g) \ # define gzgetc(g) \
((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) : gzgetc(g)) ((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) : (gzgetc)(g))
#endif #endif
/* provide 64-bit offset functions if _LARGEFILE64_SOURCE defined, and/or /* provide 64-bit offset functions if _LARGEFILE64_SOURCE defined, and/or
@ -1737,19 +1884,16 @@ ZEXTERN int ZEXPORT gzgetc_ OF((gzFile file)); /* backward compatibility */
#endif /* !Z_SOLO */ #endif /* !Z_SOLO */
/* hack for buggy compilers */
#if !defined(ZUTIL_H) && !defined(NO_DUMMY_DECL)
struct internal_state {int dummy;};
#endif
/* undocumented functions */ /* undocumented functions */
ZEXTERN const char * ZEXPORT zError OF((int)); ZEXTERN const char * ZEXPORT zError OF((int));
ZEXTERN int ZEXPORT inflateSyncPoint OF((z_streamp)); ZEXTERN int ZEXPORT inflateSyncPoint OF((z_streamp));
ZEXTERN const z_crc_t FAR * ZEXPORT get_crc_table OF((void)); ZEXTERN const z_crc_t FAR * ZEXPORT get_crc_table OF((void));
ZEXTERN int ZEXPORT inflateUndermine OF((z_streamp, int)); ZEXTERN int ZEXPORT inflateUndermine OF((z_streamp, int));
ZEXTERN int ZEXPORT inflateValidate OF((z_streamp, int));
ZEXTERN unsigned long ZEXPORT inflateCodesUsed OF ((z_streamp));
ZEXTERN int ZEXPORT inflateResetKeep OF((z_streamp)); ZEXTERN int ZEXPORT inflateResetKeep OF((z_streamp));
ZEXTERN int ZEXPORT deflateResetKeep OF((z_streamp)); ZEXTERN int ZEXPORT deflateResetKeep OF((z_streamp));
#if defined(_WIN32) && !defined(Z_SOLO) #if (defined(_WIN32) || defined(__CYGWIN__)) && !defined(Z_SOLO)
ZEXTERN gzFile ZEXPORT gzopen_w OF((const wchar_t *path, ZEXTERN gzFile ZEXPORT gzopen_w OF((const wchar_t *path,
const char *mode)); const char *mode));
#endif #endif