|
|
@@ -0,0 +1,893 @@
|
|
|
+/* zlib.h -- interface of the 'zlib' general purpose compression library
|
|
|
+ version 1.1.3, July 9th, 1998
|
|
|
+
|
|
|
+ Copyright (C) 1995-1998 Jean-loup Gailly and Mark Adler
|
|
|
+
|
|
|
+ This software is provided 'as-is', without any express or implied
|
|
|
+ warranty. In no event will the authors be held liable for any damages
|
|
|
+ arising from the use of this software.
|
|
|
+
|
|
|
+ Permission is granted to anyone to use this software for any purpose,
|
|
|
+ including commercial applications, and to alter it and redistribute it
|
|
|
+ freely, subject to the following restrictions:
|
|
|
+
|
|
|
+ 1. The origin of this software must not be misrepresented; you must not
|
|
|
+ claim that you wrote the original software. If you use this software
|
|
|
+ in a product, an acknowledgment in the product documentation would be
|
|
|
+ appreciated but is not required.
|
|
|
+ 2. Altered source versions must be plainly marked as such, and must not be
|
|
|
+ misrepresented as being the original software.
|
|
|
+ 3. This notice may not be removed or altered from any source distribution.
|
|
|
+
|
|
|
+ Jean-loup Gailly Mark Adler
|
|
|
+ jloup@gzip.org madler@alumni.caltech.edu
|
|
|
+
|
|
|
+
|
|
|
+ The data format used by the zlib library is described by RFCs (Request for
|
|
|
+ Comments) 1950 to 1952 in the files ftp://ds.internic.net/rfc/rfc1950.txt
|
|
|
+ (zlib format), rfc1951.txt (deflate format) and rfc1952.txt (gzip format).
|
|
|
+*/
|
|
|
+
|
|
|
+#ifndef _ZLIB_H
|
|
|
+#define _ZLIB_H
|
|
|
+
|
|
|
+#include "zconf_win32.h"
|
|
|
+
|
|
|
+#ifdef __cplusplus
|
|
|
+extern "C" {
|
|
|
+#endif
|
|
|
+
|
|
|
+#define ZLIB_VERSION "1.1.3"
|
|
|
+
|
|
|
+/*
|
|
|
+ The 'zlib' compression library provides in-memory compression and
|
|
|
+ decompression functions, including integrity checks of the uncompressed
|
|
|
+ data. This version of the library supports only one compression method
|
|
|
+ (deflation) but other algorithms will be added later and will have the same
|
|
|
+ stream interface.
|
|
|
+
|
|
|
+ Compression can be done in a single step if the buffers are large
|
|
|
+ enough (for example if an input file is mmap'ed), or can be done by
|
|
|
+ repeated calls of the compression function. In the latter case, the
|
|
|
+ application must provide more input and/or consume the output
|
|
|
+ (providing more output space) before each call.
|
|
|
+
|
|
|
+ The library also supports reading and writing files in gzip (.gz) format
|
|
|
+ with an interface similar to that of stdio.
|
|
|
+
|
|
|
+ The library does not install any signal handler. The decoder checks
|
|
|
+ the consistency of the compressed data, so the library should never
|
|
|
+ crash even in case of corrupted input.
|
|
|
+*/
|
|
|
+
|
|
|
+typedef voidpf (*alloc_func) OF((voidpf opaque, uInt items, uInt size));
|
|
|
+typedef void (*free_func) OF((voidpf opaque, voidpf address));
|
|
|
+
|
|
|
+struct internal_state;
|
|
|
+
|
|
|
+typedef struct z_stream_s {
|
|
|
+ Bytef *next_in; /* next input byte */
|
|
|
+ uInt avail_in; /* number of bytes available at next_in */
|
|
|
+ uLong total_in; /* total nb of input bytes read so far */
|
|
|
+
|
|
|
+ Bytef *next_out; /* next output byte should be put there */
|
|
|
+ uInt avail_out; /* remaining free space at next_out */
|
|
|
+ uLong total_out; /* total nb of bytes output so far */
|
|
|
+
|
|
|
+ char *msg; /* last error message, NULL if no error */
|
|
|
+ struct internal_state FAR *state; /* not visible by applications */
|
|
|
+
|
|
|
+ alloc_func zalloc; /* used to allocate the internal state */
|
|
|
+ free_func zfree; /* used to free the internal state */
|
|
|
+ voidpf opaque; /* private data object passed to zalloc and zfree */
|
|
|
+
|
|
|
+ int data_type; /* best guess about the data type: ascii or binary */
|
|
|
+ uLong adler; /* adler32 value of the uncompressed data */
|
|
|
+ uLong reserved; /* reserved for future use */
|
|
|
+} z_stream;
|
|
|
+
|
|
|
+typedef z_stream FAR *z_streamp;
|
|
|
+
|
|
|
+/*
|
|
|
+ The application must update next_in and avail_in when avail_in has
|
|
|
+ dropped to zero. It must update next_out and avail_out when avail_out
|
|
|
+ has dropped to zero. The application must initialize zalloc, zfree and
|
|
|
+ opaque before calling the init function. All other fields are set by the
|
|
|
+ compression library and must not be updated by the application.
|
|
|
+
|
|
|
+ The opaque value provided by the application will be passed as the first
|
|
|
+ parameter for calls of zalloc and zfree. This can be useful for custom
|
|
|
+ memory management. The compression library attaches no meaning to the
|
|
|
+ opaque value.
|
|
|
+
|
|
|
+ zalloc must return Z_NULL if there is not enough memory for the object.
|
|
|
+ If zlib is used in a multi-threaded application, zalloc and zfree must be
|
|
|
+ thread safe.
|
|
|
+
|
|
|
+ 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 the symbol MAXSEG_64K is defined (see zconf.h). WARNING: On MSDOS,
|
|
|
+ pointers returned by zalloc for objects of exactly 65536 bytes *must*
|
|
|
+ have their offset normalized to zero. The default allocation function
|
|
|
+ provided by this library ensures this (see zutil.c). To reduce memory
|
|
|
+ requirements and avoid any allocation of 64K objects, at the expense of
|
|
|
+ compression ratio, compile the library with -DMAX_WBITS=14 (see zconf.h).
|
|
|
+
|
|
|
+ The fields total_in and total_out can be used for statistics or
|
|
|
+ progress reports. After compression, total_in holds the total size of
|
|
|
+ the uncompressed data and may be saved for use in the decompressor
|
|
|
+ (particularly if the decompressor wants to decompress everything in
|
|
|
+ a single step).
|
|
|
+*/
|
|
|
+
|
|
|
+ /* constants */
|
|
|
+
|
|
|
+#define Z_NO_FLUSH 0
|
|
|
+#define Z_PARTIAL_FLUSH 1 /* will be removed, use Z_SYNC_FLUSH instead */
|
|
|
+#define Z_SYNC_FLUSH 2
|
|
|
+#define Z_FULL_FLUSH 3
|
|
|
+#define Z_FINISH 4
|
|
|
+/* Allowed flush values; see deflate() below for details */
|
|
|
+
|
|
|
+#define Z_OK 0
|
|
|
+#define Z_STREAM_END 1
|
|
|
+#define Z_NEED_DICT 2
|
|
|
+#define Z_ERRNO (-1)
|
|
|
+#define Z_STREAM_ERROR (-2)
|
|
|
+#define Z_DATA_ERROR (-3)
|
|
|
+#define Z_MEM_ERROR (-4)
|
|
|
+#define Z_BUF_ERROR (-5)
|
|
|
+#define Z_VERSION_ERROR (-6)
|
|
|
+/* Return codes for the compression/decompression functions. Negative
|
|
|
+ * values are errors, positive values are used for special but normal events.
|
|
|
+ */
|
|
|
+
|
|
|
+#define Z_NO_COMPRESSION 0
|
|
|
+#define Z_BEST_SPEED 1
|
|
|
+#define Z_BEST_COMPRESSION 9
|
|
|
+#define Z_DEFAULT_COMPRESSION (-1)
|
|
|
+/* compression levels */
|
|
|
+
|
|
|
+#define Z_FILTERED 1
|
|
|
+#define Z_HUFFMAN_ONLY 2
|
|
|
+#define Z_DEFAULT_STRATEGY 0
|
|
|
+/* compression strategy; see deflateInit2() below for details */
|
|
|
+
|
|
|
+#define Z_BINARY 0
|
|
|
+#define Z_ASCII 1
|
|
|
+#define Z_UNKNOWN 2
|
|
|
+/* Possible values of the data_type field */
|
|
|
+
|
|
|
+#define Z_DEFLATED 8
|
|
|
+/* The deflate compression method (the only one supported in this version) */
|
|
|
+
|
|
|
+#define Z_NULL 0 /* for initializing zalloc, zfree, opaque */
|
|
|
+
|
|
|
+#define zlib_version zlibVersion()
|
|
|
+/* for compatibility with versions < 1.0.2 */
|
|
|
+
|
|
|
+ /* basic functions */
|
|
|
+
|
|
|
+ZEXTERN const char * ZEXPORT zlibVersion OF((void));
|
|
|
+/* The application can compare zlibVersion and ZLIB_VERSION for consistency.
|
|
|
+ If the first character differs, the library code actually used is
|
|
|
+ not compatible with the zlib.h header file used by the application.
|
|
|
+ This check is automatically made by deflateInit and inflateInit.
|
|
|
+ */
|
|
|
+
|
|
|
+/*
|
|
|
+ZEXTERN int ZEXPORT deflateInit OF((z_streamp strm, int level));
|
|
|
+
|
|
|
+ Initializes the internal stream state for compression. The fields
|
|
|
+ zalloc, zfree and opaque must be initialized before by the caller.
|
|
|
+ If zalloc and zfree are set to Z_NULL, deflateInit updates them to
|
|
|
+ use default allocation functions.
|
|
|
+
|
|
|
+ The compression level must be Z_DEFAULT_COMPRESSION, or between 0 and 9:
|
|
|
+ 1 gives best speed, 9 gives best compression, 0 gives no compression at
|
|
|
+ all (the input data is simply copied a block at a time).
|
|
|
+ Z_DEFAULT_COMPRESSION requests a default compromise between speed and
|
|
|
+ compression (currently equivalent to level 6).
|
|
|
+
|
|
|
+ deflateInit returns Z_OK if success, Z_MEM_ERROR if there was not
|
|
|
+ enough memory, Z_STREAM_ERROR if level is not a valid compression level,
|
|
|
+ Z_VERSION_ERROR if the zlib library version (zlib_version) is incompatible
|
|
|
+ with the version assumed by the caller (ZLIB_VERSION).
|
|
|
+ msg is set to null if there is no error message. deflateInit does not
|
|
|
+ perform any compression: this will be done by deflate().
|
|
|
+*/
|
|
|
+
|
|
|
+
|
|
|
+ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));
|
|
|
+/*
|
|
|
+ deflate compresses as much data as possible, and stops when the input
|
|
|
+ buffer becomes empty or the output buffer becomes full. It may introduce some
|
|
|
+ output latency (reading input without producing any output) except when
|
|
|
+ forced to flush.
|
|
|
+
|
|
|
+ The detailed semantics are as follows. deflate performs one or both of the
|
|
|
+ following actions:
|
|
|
+
|
|
|
+ - Compress more input starting at next_in and update next_in and avail_in
|
|
|
+ accordingly. If not all input can be processed (because there is not
|
|
|
+ enough room in the output buffer), next_in and avail_in are updated and
|
|
|
+ processing will resume at this point for the next call of deflate().
|
|
|
+
|
|
|
+ - Provide more output starting at next_out and update next_out and avail_out
|
|
|
+ accordingly. This action is forced if the parameter flush is non zero.
|
|
|
+ Forcing flush frequently degrades the compression ratio, so this parameter
|
|
|
+ should be set only when necessary (in interactive applications).
|
|
|
+ Some output may be provided even if flush is not set.
|
|
|
+
|
|
|
+ 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 output, and updating avail_in or avail_out accordingly; avail_out
|
|
|
+ should never be zero before the call. The application can consume the
|
|
|
+ compressed output when it wants, for example when the output buffer is full
|
|
|
+ (avail_out == 0), or after each call of deflate(). If deflate returns Z_OK
|
|
|
+ and with zero avail_out, it must be called again after making room in the
|
|
|
+ output buffer because there might be more output pending.
|
|
|
+
|
|
|
+ If the parameter flush is set to Z_SYNC_FLUSH, all pending output is
|
|
|
+ flushed to the output buffer and the output is aligned on a byte boundary, so
|
|
|
+ that the decompressor can get all input data available so far. (In particular
|
|
|
+ avail_in is zero after the call if enough output space has been provided
|
|
|
+ before the call.) Flushing may degrade compression for some compression
|
|
|
+ algorithms and so it should be used only when necessary.
|
|
|
+
|
|
|
+ If flush is set to Z_FULL_FLUSH, all output is flushed as with
|
|
|
+ Z_SYNC_FLUSH, and the compression state is reset so that decompression can
|
|
|
+ restart from this point if previous compressed data has been damaged or if
|
|
|
+ random access is desired. Using Z_FULL_FLUSH too often can seriously degrade
|
|
|
+ the compression.
|
|
|
+
|
|
|
+ If deflate returns with avail_out == 0, this function must be called again
|
|
|
+ with the same value of the flush parameter and more output space (updated
|
|
|
+ avail_out), until the flush is complete (deflate returns with non-zero
|
|
|
+ avail_out).
|
|
|
+
|
|
|
+ If the parameter flush is set to Z_FINISH, pending input is processed,
|
|
|
+ pending output is flushed and deflate returns with Z_STREAM_END if there
|
|
|
+ was enough output space; if deflate returns with Z_OK, this function must be
|
|
|
+ called again with Z_FINISH and more output space (updated avail_out) but no
|
|
|
+ more input data, until it returns with Z_STREAM_END or an error. After
|
|
|
+ deflate has returned Z_STREAM_END, the only possible operations on the
|
|
|
+ stream are deflateReset or deflateEnd.
|
|
|
+
|
|
|
+ Z_FINISH can be used immediately after deflateInit if all the compression
|
|
|
+ is to be done in a single step. In this case, avail_out must be at least
|
|
|
+ 0.1% larger than avail_in plus 12 bytes. If deflate does not return
|
|
|
+ Z_STREAM_END, then it must be called again as described above.
|
|
|
+
|
|
|
+ deflate() sets strm->adler to the adler32 checksum of all input read
|
|
|
+ so far (that is, total_in bytes).
|
|
|
+
|
|
|
+ deflate() may update data_type if it can make a good guess about
|
|
|
+ the input data type (Z_ASCII or Z_BINARY). In doubt, the data is considered
|
|
|
+ binary. This field is only for information purposes and does not affect
|
|
|
+ the compression algorithm in any manner.
|
|
|
+
|
|
|
+ deflate() returns Z_OK if some progress has been made (more input
|
|
|
+ processed or more output produced), Z_STREAM_END if all input has been
|
|
|
+ consumed and all output has been produced (only when flush is set to
|
|
|
+ Z_FINISH), Z_STREAM_ERROR if the stream state was inconsistent (for example
|
|
|
+ if next_in or next_out was NULL), Z_BUF_ERROR if no progress is possible
|
|
|
+ (for example avail_in or avail_out was zero).
|
|
|
+*/
|
|
|
+
|
|
|
+
|
|
|
+ZEXTERN int ZEXPORT deflateEnd OF((z_streamp strm));
|
|
|
+/*
|
|
|
+ All dynamically allocated data structures for this stream are freed.
|
|
|
+ This function discards any unprocessed input and does not flush any
|
|
|
+ pending output.
|
|
|
+
|
|
|
+ deflateEnd returns Z_OK if success, Z_STREAM_ERROR if the
|
|
|
+ stream state was inconsistent, Z_DATA_ERROR if the stream was freed
|
|
|
+ prematurely (some input or output was discarded). In the error case,
|
|
|
+ msg may be set but then points to a static string (which must not be
|
|
|
+ deallocated).
|
|
|
+*/
|
|
|
+
|
|
|
+
|
|
|
+/*
|
|
|
+ZEXTERN int ZEXPORT inflateInit OF((z_streamp strm));
|
|
|
+
|
|
|
+ Initializes the internal stream state for decompression. The fields
|
|
|
+ next_in, avail_in, zalloc, zfree and opaque must be initialized before by
|
|
|
+ the caller. If next_in is not Z_NULL and avail_in is large enough (the exact
|
|
|
+ value depends on the compression method), inflateInit determines the
|
|
|
+ compression method from the zlib header and allocates all data structures
|
|
|
+ accordingly; otherwise the allocation will be deferred to the first call of
|
|
|
+ inflate. If zalloc and zfree are set to Z_NULL, inflateInit updates them to
|
|
|
+ use default allocation functions.
|
|
|
+
|
|
|
+ inflateInit returns Z_OK if success, Z_MEM_ERROR if there was not enough
|
|
|
+ memory, Z_VERSION_ERROR if the zlib library version is incompatible with the
|
|
|
+ version assumed by the caller. msg is set to null if there is no error
|
|
|
+ message. inflateInit does not perform any decompression apart from reading
|
|
|
+ the zlib header if present: this will be done by inflate(). (So next_in and
|
|
|
+ avail_in may be modified, but next_out and avail_out are unchanged.)
|
|
|
+*/
|
|
|
+
|
|
|
+
|
|
|
+ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush));
|
|
|
+/*
|
|
|
+ inflate decompresses as much data as possible, and stops when the input
|
|
|
+ buffer becomes empty or the output buffer becomes full. It may some
|
|
|
+ introduce some output latency (reading input without producing any output)
|
|
|
+ except when forced to flush.
|
|
|
+
|
|
|
+ The detailed semantics are as follows. inflate performs one or both of the
|
|
|
+ following actions:
|
|
|
+
|
|
|
+ - Decompress more input starting at next_in and update next_in and avail_in
|
|
|
+ accordingly. If not all input can be processed (because there is not
|
|
|
+ enough room in the output buffer), next_in is updated and processing
|
|
|
+ will resume at this point for the next call of inflate().
|
|
|
+
|
|
|
+ - Provide more output starting at next_out and update next_out and avail_out
|
|
|
+ accordingly. inflate() provides as much output as possible, until there
|
|
|
+ is no more input data or no more space in the output buffer (see below
|
|
|
+ about the flush parameter).
|
|
|
+
|
|
|
+ Before the call of inflate(), the application should ensure that at least
|
|
|
+ one of the actions is possible, by providing more input and/or consuming
|
|
|
+ more output, and updating the next_* and avail_* values accordingly.
|
|
|
+ The application can consume the uncompressed output when it wants, for
|
|
|
+ example when the output buffer is full (avail_out == 0), or after each
|
|
|
+ call of inflate(). If inflate returns Z_OK and with zero avail_out, it
|
|
|
+ must be called again after making room in the output buffer because there
|
|
|
+ might be more output pending.
|
|
|
+
|
|
|
+ If the parameter flush is set to Z_SYNC_FLUSH, inflate flushes as much
|
|
|
+ output as possible to the output buffer. The flushing behavior of inflate is
|
|
|
+ not specified for values of the flush parameter other than Z_SYNC_FLUSH
|
|
|
+ and Z_FINISH, but the current implementation actually flushes as much output
|
|
|
+ as possible anyway.
|
|
|
+
|
|
|
+ inflate() should normally be called until it returns Z_STREAM_END or an
|
|
|
+ error. However if all decompression is to be performed in a single step
|
|
|
+ (a single call of inflate), the parameter flush should be set to
|
|
|
+ Z_FINISH. In this case all pending input is processed and all pending
|
|
|
+ output is flushed; avail_out must be large enough to hold all the
|
|
|
+ uncompressed data. (The size of the uncompressed data may have been saved
|
|
|
+ by the compressor for this purpose.) The next operation on this stream must
|
|
|
+ be inflateEnd to deallocate the decompression state. The use of Z_FINISH
|
|
|
+ is never required, but can be used to inform inflate that a faster routine
|
|
|
+ may be used for the single inflate() call.
|
|
|
+
|
|
|
+ If a preset dictionary is needed at this point (see inflateSetDictionary
|
|
|
+ below), inflate sets strm-adler to the adler32 checksum of the
|
|
|
+ dictionary chosen by the compressor and returns Z_NEED_DICT; otherwise
|
|
|
+ it sets strm->adler to the adler32 checksum of all output produced
|
|
|
+ so far (that is, total_out bytes) and returns Z_OK, Z_STREAM_END or
|
|
|
+ an error code as described below. At the end of the stream, inflate()
|
|
|
+ checks that its computed adler32 checksum is equal to that saved by the
|
|
|
+ compressor and returns Z_STREAM_END only if the checksum is correct.
|
|
|
+
|
|
|
+ inflate() returns Z_OK if some progress has been made (more input processed
|
|
|
+ or more output produced), Z_STREAM_END if the end of the compressed data has
|
|
|
+ been reached and all uncompressed output has been produced, Z_NEED_DICT if a
|
|
|
+ preset dictionary is needed at this point, Z_DATA_ERROR if the input data was
|
|
|
+ corrupted (input stream not conforming to the zlib format or incorrect
|
|
|
+ adler32 checksum), Z_STREAM_ERROR if the stream structure was inconsistent
|
|
|
+ (for example if next_in or next_out was NULL), Z_MEM_ERROR if there was not
|
|
|
+ enough memory, Z_BUF_ERROR if no progress is possible or if there was not
|
|
|
+ enough room in the output buffer when Z_FINISH is used. In the Z_DATA_ERROR
|
|
|
+ case, the application may then call inflateSync to look for a good
|
|
|
+ compression block.
|
|
|
+*/
|
|
|
+
|
|
|
+
|
|
|
+ZEXTERN int ZEXPORT inflateEnd OF((z_streamp strm));
|
|
|
+/*
|
|
|
+ All dynamically allocated data structures for this stream are freed.
|
|
|
+ This function discards any unprocessed input and does not flush any
|
|
|
+ pending output.
|
|
|
+
|
|
|
+ inflateEnd returns Z_OK if success, Z_STREAM_ERROR if the stream state
|
|
|
+ was inconsistent. In the error case, msg may be set but then points to a
|
|
|
+ static string (which must not be deallocated).
|
|
|
+*/
|
|
|
+
|
|
|
+ /* Advanced functions */
|
|
|
+
|
|
|
+/*
|
|
|
+ The following functions are needed only in some special applications.
|
|
|
+*/
|
|
|
+
|
|
|
+/*
|
|
|
+ZEXTERN int ZEXPORT deflateInit2 OF((z_streamp strm,
|
|
|
+ int level,
|
|
|
+ int method,
|
|
|
+ int windowBits,
|
|
|
+ int memLevel,
|
|
|
+ int strategy));
|
|
|
+
|
|
|
+ This is another version of deflateInit with more compression options. The
|
|
|
+ fields next_in, zalloc, zfree and opaque must be initialized before by
|
|
|
+ the caller.
|
|
|
+
|
|
|
+ The method parameter is the compression method. It must be Z_DEFLATED in
|
|
|
+ this version of the library.
|
|
|
+
|
|
|
+ The windowBits parameter is the base two logarithm of the window size
|
|
|
+ (the size of the history buffer). It should be in the range 8..15 for this
|
|
|
+ version of the library. Larger values of this parameter result in better
|
|
|
+ compression at the expense of memory usage. The default value is 15 if
|
|
|
+ deflateInit is used instead.
|
|
|
+
|
|
|
+ The memLevel parameter specifies how much memory should be allocated
|
|
|
+ for the internal compression state. memLevel=1 uses minimum memory but
|
|
|
+ is slow and reduces compression ratio; memLevel=9 uses maximum memory
|
|
|
+ for optimal speed. The default value is 8. See zconf.h for total memory
|
|
|
+ usage as a function of windowBits and memLevel.
|
|
|
+
|
|
|
+ The strategy parameter is used to tune the compression algorithm. Use the
|
|
|
+ value Z_DEFAULT_STRATEGY for normal data, Z_FILTERED for data produced by a
|
|
|
+ filter (or predictor), or Z_HUFFMAN_ONLY to force Huffman encoding only (no
|
|
|
+ string match). Filtered data consists mostly of small values with a
|
|
|
+ somewhat random distribution. In this case, the compression algorithm is
|
|
|
+ tuned to compress them better. The effect of Z_FILTERED is to force more
|
|
|
+ Huffman coding and less string matching; it is somewhat intermediate
|
|
|
+ between Z_DEFAULT and Z_HUFFMAN_ONLY. The strategy parameter only affects
|
|
|
+ the compression ratio but not the correctness of the compressed output even
|
|
|
+ if it is not set appropriately.
|
|
|
+
|
|
|
+ deflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
|
|
|
+ memory, Z_STREAM_ERROR if a parameter is invalid (such as an invalid
|
|
|
+ method). msg is set to null if there is no error message. deflateInit2 does
|
|
|
+ not perform any compression: this will be done by deflate().
|
|
|
+*/
|
|
|
+
|
|
|
+ZEXTERN int ZEXPORT deflateSetDictionary OF((z_streamp strm,
|
|
|
+ const Bytef *dictionary,
|
|
|
+ uInt dictLength));
|
|
|
+/*
|
|
|
+ Initializes the compression dictionary from the given byte sequence
|
|
|
+ without producing any compressed output. This function must be called
|
|
|
+ immediately after deflateInit, deflateInit2 or deflateReset, before any
|
|
|
+ call of deflate. The compressor and decompressor must use exactly the same
|
|
|
+ dictionary (see inflateSetDictionary).
|
|
|
+
|
|
|
+ The dictionary should consist of strings (byte sequences) that are likely
|
|
|
+ to be encountered later in the data to be compressed, with the most commonly
|
|
|
+ used strings preferably put towards the end of the dictionary. Using a
|
|
|
+ dictionary is most useful when the data to be compressed is short and can be
|
|
|
+ predicted with good accuracy; the data can then be compressed better than
|
|
|
+ with the default empty dictionary.
|
|
|
+
|
|
|
+ Depending on the size of the compression data structures selected by
|
|
|
+ deflateInit or deflateInit2, a part of the dictionary may in effect be
|
|
|
+ discarded, for example if the dictionary is larger than the window size in
|
|
|
+ deflate or deflate2. Thus the strings most likely to be useful should be
|
|
|
+ put at the end of the dictionary, not at the front.
|
|
|
+
|
|
|
+ Upon return of this function, strm->adler is set to the Adler32 value
|
|
|
+ of the dictionary; the decompressor may later use this value to determine
|
|
|
+ which dictionary has been used by the compressor. (The Adler32 value
|
|
|
+ applies to the whole dictionary even if only a subset of the dictionary is
|
|
|
+ actually used by the compressor.)
|
|
|
+
|
|
|
+ deflateSetDictionary returns Z_OK if success, or Z_STREAM_ERROR if a
|
|
|
+ parameter is invalid (such as NULL dictionary) or the stream state is
|
|
|
+ inconsistent (for example if deflate has already been called for this stream
|
|
|
+ or if the compression method is bsort). deflateSetDictionary does not
|
|
|
+ perform any compression: this will be done by deflate().
|
|
|
+*/
|
|
|
+
|
|
|
+ZEXTERN int ZEXPORT deflateCopy OF((z_streamp dest,
|
|
|
+ z_streamp source));
|
|
|
+/*
|
|
|
+ Sets the destination stream as a complete copy of the source stream.
|
|
|
+
|
|
|
+ This function can be useful when several compression strategies will be
|
|
|
+ tried, for example when there are several ways of pre-processing the input
|
|
|
+ data with a filter. The streams that will be discarded should then be freed
|
|
|
+ by calling deflateEnd. Note that deflateCopy duplicates the internal
|
|
|
+ compression state which can be quite large, so this strategy is slow and
|
|
|
+ can consume lots of memory.
|
|
|
+
|
|
|
+ deflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not
|
|
|
+ enough memory, Z_STREAM_ERROR if the source stream state was inconsistent
|
|
|
+ (such as zalloc being NULL). msg is left unchanged in both source and
|
|
|
+ destination.
|
|
|
+*/
|
|
|
+
|
|
|
+ZEXTERN int ZEXPORT deflateReset OF((z_streamp strm));
|
|
|
+/*
|
|
|
+ This function is equivalent to deflateEnd followed by deflateInit,
|
|
|
+ but does not free and reallocate all the internal compression state.
|
|
|
+ The stream will keep the same compression level and any other attributes
|
|
|
+ that may have been set by deflateInit2.
|
|
|
+
|
|
|
+ deflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source
|
|
|
+ stream state was inconsistent (such as zalloc or state being NULL).
|
|
|
+*/
|
|
|
+
|
|
|
+ZEXTERN int ZEXPORT deflateParams OF((z_streamp strm,
|
|
|
+ int level,
|
|
|
+ int strategy));
|
|
|
+/*
|
|
|
+ Dynamically update the compression level and compression strategy. The
|
|
|
+ interpretation of level and strategy is as in deflateInit2. This can be
|
|
|
+ used to switch between compression and straight copy of the input data, or
|
|
|
+ to switch to a different kind of input data requiring a different
|
|
|
+ strategy. If the compression level is changed, the input available so far
|
|
|
+ is compressed with the old level (and may be flushed); the new level will
|
|
|
+ take effect only at the next call of deflate().
|
|
|
+
|
|
|
+ Before the call of deflateParams, the stream state must be set as for
|
|
|
+ a call of deflate(), since the currently available input may have to
|
|
|
+ be compressed and flushed. In particular, strm->avail_out must be non-zero.
|
|
|
+
|
|
|
+ deflateParams returns Z_OK if success, Z_STREAM_ERROR if the source
|
|
|
+ stream state was inconsistent or if a parameter was invalid, Z_BUF_ERROR
|
|
|
+ if strm->avail_out was zero.
|
|
|
+*/
|
|
|
+
|
|
|
+/*
|
|
|
+ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm,
|
|
|
+ int windowBits));
|
|
|
+
|
|
|
+ This is another version of inflateInit with an extra parameter. The
|
|
|
+ fields next_in, avail_in, zalloc, zfree and opaque must be initialized
|
|
|
+ before by the caller.
|
|
|
+
|
|
|
+ The windowBits parameter is the base two logarithm of the maximum window
|
|
|
+ size (the size of the history buffer). It should be in the range 8..15 for
|
|
|
+ this version of the library. The default value is 15 if inflateInit is used
|
|
|
+ instead. If a compressed stream with a larger window size is given as
|
|
|
+ input, inflate() will return with the error code Z_DATA_ERROR instead of
|
|
|
+ trying to allocate a larger window.
|
|
|
+
|
|
|
+ inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
|
|
|
+ memory, Z_STREAM_ERROR if a parameter is invalid (such as a negative
|
|
|
+ memLevel). msg is set to null if there is no error message. inflateInit2
|
|
|
+ does not perform any decompression apart from reading the zlib header if
|
|
|
+ present: this will be done by inflate(). (So next_in and avail_in may be
|
|
|
+ modified, but next_out and avail_out are unchanged.)
|
|
|
+*/
|
|
|
+
|
|
|
+ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp strm,
|
|
|
+ const Bytef *dictionary,
|
|
|
+ uInt dictLength));
|
|
|
+/*
|
|
|
+ Initializes the decompression dictionary from the given uncompressed byte
|
|
|
+ sequence. This function must be called immediately after a call of inflate
|
|
|
+ if this call returned Z_NEED_DICT. The dictionary chosen by the compressor
|
|
|
+ can be determined from the Adler32 value returned by this call of
|
|
|
+ inflate. The compressor and decompressor must use exactly the same
|
|
|
+ dictionary (see deflateSetDictionary).
|
|
|
+
|
|
|
+ inflateSetDictionary returns Z_OK if success, Z_STREAM_ERROR if a
|
|
|
+ parameter is invalid (such as NULL dictionary) or the stream state is
|
|
|
+ inconsistent, Z_DATA_ERROR if the given dictionary doesn't match the
|
|
|
+ expected one (incorrect Adler32 value). inflateSetDictionary does not
|
|
|
+ perform any decompression: this will be done by subsequent calls of
|
|
|
+ inflate().
|
|
|
+*/
|
|
|
+
|
|
|
+ZEXTERN int ZEXPORT inflateSync OF((z_streamp strm));
|
|
|
+/*
|
|
|
+ Skips invalid compressed data until a full flush point (see above the
|
|
|
+ description of deflate with Z_FULL_FLUSH) can be found, or until all
|
|
|
+ available input is skipped. No output is provided.
|
|
|
+
|
|
|
+ inflateSync returns Z_OK if a full flush point has been found, Z_BUF_ERROR
|
|
|
+ if no more input was provided, Z_DATA_ERROR if no flush point has been found,
|
|
|
+ or Z_STREAM_ERROR if the stream structure was inconsistent. In the success
|
|
|
+ case, the application may save the current current value of total_in which
|
|
|
+ indicates where valid compressed data was found. In the error case, the
|
|
|
+ application may repeatedly call inflateSync, providing more input each time,
|
|
|
+ until success or end of the input data.
|
|
|
+*/
|
|
|
+
|
|
|
+ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm));
|
|
|
+/*
|
|
|
+ This function is equivalent to inflateEnd followed by inflateInit,
|
|
|
+ but does not free and reallocate all the internal decompression state.
|
|
|
+ The stream will keep attributes that may have been set by inflateInit2.
|
|
|
+
|
|
|
+ inflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source
|
|
|
+ stream state was inconsistent (such as zalloc or state being NULL).
|
|
|
+*/
|
|
|
+
|
|
|
+
|
|
|
+ /* utility functions */
|
|
|
+
|
|
|
+/*
|
|
|
+ The following utility functions are implemented on top of the
|
|
|
+ basic stream-oriented functions. To simplify the interface, some
|
|
|
+ default options are assumed (compression level and memory usage,
|
|
|
+ standard memory allocation functions). The source code of these
|
|
|
+ utility functions can easily be modified if you need special options.
|
|
|
+*/
|
|
|
+
|
|
|
+ZEXTERN int ZEXPORT compress OF((Bytef *dest, uLongf *destLen,
|
|
|
+ const Bytef *source, uLong sourceLen));
|
|
|
+/*
|
|
|
+ Compresses the source buffer into the destination buffer. sourceLen is
|
|
|
+ the byte length of the source buffer. Upon entry, destLen is the total
|
|
|
+ size of the destination buffer, which must be at least 0.1% larger than
|
|
|
+ sourceLen plus 12 bytes. Upon exit, destLen is the actual size of the
|
|
|
+ compressed buffer.
|
|
|
+ This function can be used to compress a whole file at once if the
|
|
|
+ input file is mmap'ed.
|
|
|
+ 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
|
|
|
+ buffer.
|
|
|
+*/
|
|
|
+
|
|
|
+ZEXTERN int ZEXPORT compress2 OF((Bytef *dest, uLongf *destLen,
|
|
|
+ const Bytef *source, uLong sourceLen,
|
|
|
+ int level));
|
|
|
+/*
|
|
|
+ Compresses the source buffer into the destination buffer. The level
|
|
|
+ parameter has the same meaning as in deflateInit. sourceLen is the byte
|
|
|
+ length of the source buffer. Upon entry, destLen is the total size of the
|
|
|
+ destination buffer, which must be at least 0.1% larger than sourceLen plus
|
|
|
+ 12 bytes. Upon exit, destLen is the actual size of the compressed buffer.
|
|
|
+
|
|
|
+ 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,
|
|
|
+ Z_STREAM_ERROR if the level parameter is invalid.
|
|
|
+*/
|
|
|
+
|
|
|
+ZEXTERN int ZEXPORT uncompress OF((Bytef *dest, uLongf *destLen,
|
|
|
+ const Bytef *source, uLong sourceLen));
|
|
|
+/*
|
|
|
+ Decompresses the source buffer into the destination buffer. sourceLen is
|
|
|
+ the byte length of the source buffer. Upon entry, destLen is the total
|
|
|
+ size of the destination buffer, which must be large enough to hold the
|
|
|
+ entire uncompressed data. (The size of the uncompressed data must have
|
|
|
+ been saved previously by the compressor and transmitted to the decompressor
|
|
|
+ by some mechanism outside the scope of this compression library.)
|
|
|
+ Upon exit, destLen is the actual size of the compressed buffer.
|
|
|
+ This function can be used to decompress a whole file at once if the
|
|
|
+ input file is mmap'ed.
|
|
|
+
|
|
|
+ uncompress returns Z_OK if success, Z_MEM_ERROR if there was not
|
|
|
+ enough memory, Z_BUF_ERROR if there was not enough room in the output
|
|
|
+ buffer, or Z_DATA_ERROR if the input data was corrupted.
|
|
|
+*/
|
|
|
+
|
|
|
+
|
|
|
+typedef voidp gzFile;
|
|
|
+
|
|
|
+ZEXTERN gzFile ZEXPORT gzopen OF((const char *path, const char *mode));
|
|
|
+/*
|
|
|
+ Opens a gzip (.gz) file for reading or writing. The mode parameter
|
|
|
+ is as in fopen ("rb" or "wb") but can also include a compression level
|
|
|
+ ("wb9") or a strategy: 'f' for filtered data as in "wb6f", 'h' for
|
|
|
+ Huffman only compression as in "wb1h". (See the description
|
|
|
+ of deflateInit2 for more information about the strategy parameter.)
|
|
|
+
|
|
|
+ gzopen can be used to read a file which is not in gzip format; in this
|
|
|
+ case gzread will directly read from the file without decompression.
|
|
|
+
|
|
|
+ gzopen returns NULL if the file could not be opened or if there was
|
|
|
+ insufficient memory to allocate the (de)compression state; errno
|
|
|
+ can be checked to distinguish the two cases (if errno is zero, the
|
|
|
+ zlib error is Z_MEM_ERROR). */
|
|
|
+
|
|
|
+ZEXTERN gzFile ZEXPORT gzdopen OF((int fd, const char *mode));
|
|
|
+/*
|
|
|
+ gzdopen() associates a gzFile with the file descriptor fd. File
|
|
|
+ descriptors are obtained from calls like open, dup, creat, pipe or
|
|
|
+ fileno (in the file has been previously opened with fopen).
|
|
|
+ The mode parameter is as in gzopen.
|
|
|
+ The next call of gzclose on the returned gzFile will also close the
|
|
|
+ file descriptor fd, just like fclose(fdopen(fd), mode) closes the file
|
|
|
+ descriptor fd. If you want to keep fd open, use gzdopen(dup(fd), mode).
|
|
|
+ gzdopen returns NULL if there was insufficient memory to allocate
|
|
|
+ the (de)compression state.
|
|
|
+*/
|
|
|
+
|
|
|
+ZEXTERN int ZEXPORT gzsetparams OF((gzFile file, int level, int strategy));
|
|
|
+/*
|
|
|
+ Dynamically update the compression level or strategy. See the description
|
|
|
+ of deflateInit2 for the meaning of these parameters.
|
|
|
+ gzsetparams returns Z_OK if success, or Z_STREAM_ERROR if the file was not
|
|
|
+ opened for writing.
|
|
|
+*/
|
|
|
+
|
|
|
+ZEXTERN int ZEXPORT gzread OF((gzFile file, voidp buf, unsigned len));
|
|
|
+/*
|
|
|
+ Reads the given number of uncompressed bytes from the compressed file.
|
|
|
+ If the input file was not in gzip format, gzread copies the given number
|
|
|
+ of bytes into the buffer.
|
|
|
+ gzread returns the number of uncompressed bytes actually read (0 for
|
|
|
+ end of file, -1 for error). */
|
|
|
+
|
|
|
+ZEXTERN int ZEXPORT gzwrite OF((gzFile file,
|
|
|
+ const voidp buf, unsigned len));
|
|
|
+/*
|
|
|
+ Writes the given number of uncompressed bytes into the compressed file.
|
|
|
+ gzwrite returns the number of uncompressed bytes actually written
|
|
|
+ (0 in case of error).
|
|
|
+*/
|
|
|
+
|
|
|
+ZEXTERN int ZEXPORTVA gzprintf OF((gzFile file, const char *format, ...));
|
|
|
+/*
|
|
|
+ Converts, formats, and writes the args to the compressed file under
|
|
|
+ control of the format string, as in fprintf. gzprintf returns the number of
|
|
|
+ uncompressed bytes actually written (0 in case of error).
|
|
|
+*/
|
|
|
+
|
|
|
+ZEXTERN int ZEXPORT gzputs OF((gzFile file, const char *s));
|
|
|
+/*
|
|
|
+ Writes the given null-terminated string to the compressed file, excluding
|
|
|
+ the terminating null character.
|
|
|
+ gzputs returns the number of characters written, or -1 in case of error.
|
|
|
+*/
|
|
|
+
|
|
|
+ZEXTERN char * ZEXPORT gzgets OF((gzFile file, char *buf, int len));
|
|
|
+/*
|
|
|
+ Reads bytes from the compressed file until len-1 characters are read, or
|
|
|
+ a newline character is read and transferred to buf, or an end-of-file
|
|
|
+ condition is encountered. The string is then terminated with a null
|
|
|
+ character.
|
|
|
+ gzgets returns buf, or Z_NULL in case of error.
|
|
|
+*/
|
|
|
+
|
|
|
+ZEXTERN int ZEXPORT gzputc OF((gzFile file, int c));
|
|
|
+/*
|
|
|
+ Writes c, converted to an unsigned char, into the compressed file.
|
|
|
+ gzputc returns the value that was written, or -1 in case of error.
|
|
|
+*/
|
|
|
+
|
|
|
+ZEXTERN int ZEXPORT gzgetc OF((gzFile file));
|
|
|
+/*
|
|
|
+ Reads one byte from the compressed file. gzgetc returns this byte
|
|
|
+ or -1 in case of end of file or error.
|
|
|
+*/
|
|
|
+
|
|
|
+ZEXTERN int ZEXPORT gzflush OF((gzFile file, int flush));
|
|
|
+/*
|
|
|
+ Flushes all pending output into the compressed file. The parameter
|
|
|
+ flush is as in the deflate() function. The return value is the zlib
|
|
|
+ error number (see function gzerror below). gzflush returns Z_OK if
|
|
|
+ the flush parameter is Z_FINISH and all output could be flushed.
|
|
|
+ gzflush should be called only when strictly necessary because it can
|
|
|
+ degrade compression.
|
|
|
+*/
|
|
|
+
|
|
|
+ZEXTERN z_off_t ZEXPORT gzseek OF((gzFile file,
|
|
|
+ z_off_t offset, int whence));
|
|
|
+/*
|
|
|
+ Sets the starting position for the next gzread or gzwrite on the
|
|
|
+ given compressed file. The offset represents a number of bytes in the
|
|
|
+ uncompressed data stream. The whence parameter is defined as in lseek(2);
|
|
|
+ the value SEEK_END is not supported.
|
|
|
+ If the file is opened for reading, this function is emulated but can be
|
|
|
+ extremely slow. If the file is opened for writing, only forward seeks are
|
|
|
+ supported; gzseek then compresses a sequence of zeroes up to the new
|
|
|
+ starting position.
|
|
|
+
|
|
|
+ gzseek returns the resulting offset location as measured in bytes from
|
|
|
+ the beginning of the uncompressed stream, or -1 in case of error, in
|
|
|
+ particular if the file is opened for writing and the new starting position
|
|
|
+ would be before the current position.
|
|
|
+*/
|
|
|
+
|
|
|
+ZEXTERN int ZEXPORT gzrewind OF((gzFile file));
|
|
|
+/*
|
|
|
+ Rewinds the given file. This function is supported only for reading.
|
|
|
+
|
|
|
+ gzrewind(file) is equivalent to (int)gzseek(file, 0L, SEEK_SET)
|
|
|
+*/
|
|
|
+
|
|
|
+ZEXTERN z_off_t ZEXPORT gztell OF((gzFile file));
|
|
|
+/*
|
|
|
+ Returns the starting position for the next gzread or gzwrite on the
|
|
|
+ given compressed file. This position represents a number of bytes in the
|
|
|
+ uncompressed data stream.
|
|
|
+
|
|
|
+ gztell(file) is equivalent to gzseek(file, 0L, SEEK_CUR)
|
|
|
+*/
|
|
|
+
|
|
|
+ZEXTERN int ZEXPORT gzeof OF((gzFile file));
|
|
|
+/*
|
|
|
+ Returns 1 when EOF has previously been detected reading the given
|
|
|
+ input stream, otherwise zero.
|
|
|
+*/
|
|
|
+
|
|
|
+ZEXTERN int ZEXPORT gzclose OF((gzFile file));
|
|
|
+/*
|
|
|
+ Flushes all pending output if necessary, closes the compressed file
|
|
|
+ and deallocates all the (de)compression state. The return value is the zlib
|
|
|
+ error number (see function gzerror below).
|
|
|
+*/
|
|
|
+
|
|
|
+ZEXTERN const char * ZEXPORT gzerror OF((gzFile file, int *errnum));
|
|
|
+/*
|
|
|
+ Returns the error message for the last error which occurred on the
|
|
|
+ given compressed file. errnum is set to zlib error number. If an
|
|
|
+ error occurred in the file system and not in the compression library,
|
|
|
+ errnum is set to Z_ERRNO and the application may consult errno
|
|
|
+ to get the exact error code.
|
|
|
+*/
|
|
|
+
|
|
|
+ /* checksum functions */
|
|
|
+
|
|
|
+/*
|
|
|
+ These functions are not related to compression but are exported
|
|
|
+ anyway because they might be useful in applications using the
|
|
|
+ compression library.
|
|
|
+*/
|
|
|
+
|
|
|
+ZEXTERN uLong ZEXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len));
|
|
|
+
|
|
|
+/*
|
|
|
+ Update a running Adler-32 checksum with the bytes buf[0..len-1] and
|
|
|
+ return the updated checksum. If buf is NULL, this function returns
|
|
|
+ the required initial value for the checksum.
|
|
|
+ An Adler-32 checksum is almost as reliable as a CRC32 but can be computed
|
|
|
+ much faster. Usage example:
|
|
|
+
|
|
|
+ uLong adler = adler32(0L, Z_NULL, 0);
|
|
|
+
|
|
|
+ while (read_buffer(buffer, length) != EOF) {
|
|
|
+ adler = adler32(adler, buffer, length);
|
|
|
+ }
|
|
|
+ if (adler != original_adler) error();
|
|
|
+*/
|
|
|
+
|
|
|
+ZEXTERN uLong ZEXPORT crc32 OF((uLong crc, const Bytef *buf, uInt len));
|
|
|
+/*
|
|
|
+ Update a running crc with the bytes buf[0..len-1] and return the updated
|
|
|
+ crc. If buf is NULL, this function returns the required initial value
|
|
|
+ for the crc. Pre- and post-conditioning (one's complement) is performed
|
|
|
+ within this function so it shouldn't be done by the application.
|
|
|
+ Usage example:
|
|
|
+
|
|
|
+ uLong crc = crc32(0L, Z_NULL, 0);
|
|
|
+
|
|
|
+ while (read_buffer(buffer, length) != EOF) {
|
|
|
+ crc = crc32(crc, buffer, length);
|
|
|
+ }
|
|
|
+ if (crc != original_crc) error();
|
|
|
+*/
|
|
|
+
|
|
|
+
|
|
|
+ /* various hacks, don't look :) */
|
|
|
+
|
|
|
+/* deflateInit and inflateInit are macros to allow checking the zlib version
|
|
|
+ * and the compiler's view of z_stream:
|
|
|
+ */
|
|
|
+ZEXTERN int ZEXPORT deflateInit_ OF((z_streamp strm, int level,
|
|
|
+ const char *version, int stream_size));
|
|
|
+ZEXTERN int ZEXPORT inflateInit_ OF((z_streamp strm,
|
|
|
+ const char *version, int stream_size));
|
|
|
+ZEXTERN int ZEXPORT deflateInit2_ OF((z_streamp strm, int level, int method,
|
|
|
+ int windowBits, int memLevel,
|
|
|
+ int strategy, const char *version,
|
|
|
+ int stream_size));
|
|
|
+ZEXTERN int ZEXPORT inflateInit2_ OF((z_streamp strm, int windowBits,
|
|
|
+ const char *version, int stream_size));
|
|
|
+#define deflateInit(strm, level) \
|
|
|
+ deflateInit_((strm), (level), ZLIB_VERSION, sizeof(z_stream))
|
|
|
+#define inflateInit(strm) \
|
|
|
+ inflateInit_((strm), ZLIB_VERSION, sizeof(z_stream))
|
|
|
+#define deflateInit2(strm, level, method, windowBits, memLevel, strategy) \
|
|
|
+ deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\
|
|
|
+ (strategy), ZLIB_VERSION, sizeof(z_stream))
|
|
|
+#define inflateInit2(strm, windowBits) \
|
|
|
+ inflateInit2_((strm), (windowBits), ZLIB_VERSION, sizeof(z_stream))
|
|
|
+
|
|
|
+
|
|
|
+#if !defined(_Z_UTIL_H) && !defined(NO_DUMMY_DECL)
|
|
|
+ struct internal_state {int dummy;}; /* hack for buggy compilers */
|
|
|
+#endif
|
|
|
+
|
|
|
+ZEXTERN const char * ZEXPORT zError OF((int err));
|
|
|
+ZEXTERN int ZEXPORT inflateSyncPoint OF((z_streamp z));
|
|
|
+ZEXTERN const uLongf * ZEXPORT get_crc_table OF((void));
|
|
|
+
|
|
|
+#ifdef __cplusplus
|
|
|
+}
|
|
|
+#endif
|
|
|
+
|
|
|
+#endif /* _ZLIB_H */
|
celest