jdk-sandbox: comparison jdk/src/java.base/share/native/libzip/zlib-1.2.8/zlib.h

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-:40f9a2b0c304
+:a26be46f6bac
-/*
-* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
-*
-* This code is free software; you can redistribute it and/or modify it
-* under the terms of the GNU General Public License version 2 only, as
-* published by the Free Software Foundation.  Oracle designates this
-* particular file as subject to the "Classpath" exception as provided
-* by Oracle in the LICENSE file that accompanied this code.
-*
-* This code is distributed in the hope that it will be useful, but WITHOUT
-* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
-* version 2 for more details (a copy is included in the LICENSE file that
-* accompanied this code).
-*
-* You should have received a copy of the GNU General Public License version
-* 2 along with this work; if not, write to the Free Software Foundation,
-* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
-*
-* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
-* or visit www.oracle.com if you need additional information or have any
-* questions.
-*/
-/* zlib.h -- interface of the 'zlib' general purpose compression library
-version 1.2.8, April 28th, 2013
-Copyright (C) 1995-2013 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 http://tools.ietf.org/html/rfc1950
-(zlib format), rfc1951 (deflate format) and rfc1952 (gzip format).
-*/
-#ifndef ZLIB_H
-#define ZLIB_H
-#include "zconf.h"
-#ifdef __cplusplus
-extern "C" {
-#endif
-#define ZLIB_VERSION "1.2.8"
-#define ZLIB_VERNUM 0x1280
-#define ZLIB_VER_MAJOR 1
-#define ZLIB_VER_MINOR 2
-#define ZLIB_VER_REVISION 8
-#define ZLIB_VER_SUBREVISION 0
-/*
-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,
-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 compressed data format used by default by the in-memory functions is
-the zlib format, which is a zlib wrapper documented in RFC 1950, wrapped
-around a deflate stream, which is itself documented in RFC 1951.
-The library also supports reading and writing files in gzip (.gz) format
-with an interface similar to that of stdio using the functions that start
-with "gz".  The gzip format is different from the zlib format.  gzip is a
-gzip wrapper, documented in RFC 1952, wrapped around a deflate stream.
-This library can optionally read and write gzip streams in memory as well.
-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-
-file compression on file systems, has a larger header than zlib to maintain
-directory information, and uses a different, slower check method than zlib.
-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 {
-z_const Bytef *next_in;     /* next input byte */
-uInt     avail_in;  /* number of bytes available at next_in */
-uLong    total_in;  /* total number of input bytes read so far */
-Bytef    *next_out; /* next output byte should be put there */
-uInt     avail_out; /* remaining free space at next_out */
-uLong    total_out; /* total number of bytes output so far */
-z_const char *msg;  /* last error message, NULL if no error */
-struct internal_state FAR *state; /* not visible by applications */
-alloc_func zalloc;  /* used to allocate the internal state */
-free_func  zfree;   /* used to free the internal state */
-voidpf     opaque;  /* private data object passed to zalloc and zfree */
-int     data_type;  /* best guess about the data type: binary or text */
-uLong   adler;      /* adler32 value of the uncompressed data */
-uLong   reserved;   /* reserved for future use */
-} z_stream;
-typedef z_stream FAR *z_streamp;
-/*
-gzip header information passed to and from zlib routines.  See RFC 1952
-for more details on the meanings of these fields.
-*/
-typedef struct gz_header_s {
-int     text;       /* true if compressed data believed to be text */
-uLong   time;       /* modification time */
-int     xflags;     /* extra flags (not used when writing a gzip file) */
-int     os;         /* operating system */
-Bytef   *extra;     /* pointer to extra field or Z_NULL if none */
-uInt    extra_len;  /* extra field length (valid if extra != Z_NULL) */
-uInt    extra_max;  /* space at extra (only when reading header) */
-Bytef   *name;      /* pointer to zero-terminated file name or Z_NULL */
-uInt    name_max;   /* space at name (only when reading header) */
-Bytef   *comment;   /* pointer to zero-terminated comment or Z_NULL */
-uInt    comm_max;   /* space at comment (only when reading header) */
-int     hcrc;       /* true if there was or will be a header crc */
-int     done;       /* true when done reading gzip header (not used
-when writing a gzip file) */
-} gz_header;
-typedef gz_header FAR *gz_headerp;
-/*
-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
-#define Z_SYNC_FLUSH    2
-#define Z_FULL_FLUSH    3
-#define Z_FINISH        4
-#define Z_BLOCK         5
-#define Z_TREES         6
-/* Allowed flush values; see deflate() and inflate() 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_RLE                 3
-#define Z_FIXED               4
-#define Z_DEFAULT_STRATEGY    0
-/* compression strategy; see deflateInit2() below for details */
-#define Z_BINARY   0
-#define Z_TEXT     1
-#define Z_ASCII    Z_TEXT   /* for compatibility with 1.2.2 and earlier */
-#define Z_UNKNOWN  2
-/* Possible values of the data_type field (though see inflate()) */
-#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, or
-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.
-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
-maximize compression.
-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.  This
-completes the current deflate block and follows it with an empty stored block
-that is three bits plus filler bits to the next byte, followed by four bytes
-(00 00 ff ff).
-If flush is set to Z_PARTIAL_FLUSH, all pending output is flushed to the
-output buffer, but the output is not aligned to a byte boundary.  All of the
-input data so far will be available to the decompressor, as for Z_SYNC_FLUSH.
-This completes the current deflate block and follows it with an empty fixed
-codes block that is 10 bits long.  This assures that enough bytes are output
-in order for the decompressor to finish the block before the empty fixed code
-block.
-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
-seven bits of the current block are held to be written as the next byte after
-the next deflate block is completed.  In this case, the decompressor may not
-be provided enough bits at this point in order to complete decompression of
-the data provided so far to the compressor.  It may need to wait for the next
-block to be emitted.  This is for advanced applications that need to control
-the emission of deflate blocks.
-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
-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).  In the case of a Z_FULL_FLUSH or Z_SYNC_FLUSH, make sure that
-avail_out is greater than six to avoid repeated flush markers due to
-avail_out == 0 on return.
-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 the
-value returned by deflateBound (see below).  Then deflate is guaranteed to
-return Z_STREAM_END.  If not enough output space is provided, deflate will
-not return Z_STREAM_END, and it must be called again as described above.
-deflate() sets strm->adler to the adler32 checksum of all input read
-so far (that is, total_in bytes).
-deflate() may update strm->data_type if it can make a good guess about
-the input data type (Z_BINARY or Z_TEXT).  In doubt, the data is considered
-binary.  This field is only for information purposes and does not affect the
-compression algorithm in any manner.
-deflate() returns Z_OK if some progress has been made (more input
-processed or more output produced), Z_STREAM_END if all input has been
-consumed and all output has been produced (only when flush is set to
-Z_FINISH), Z_STREAM_ERROR if the stream state was inconsistent (for example
-if next_in or next_out was Z_NULL), Z_BUF_ERROR if no progress is possible
-(for example avail_in or avail_out was zero).  Note that Z_BUF_ERROR is not
-fatal, and deflate() can be called again with more input and more output
-space to continue compressing.
-*/
-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, or Z_STREAM_ERROR if the parameters are
-invalid, such as a null pointer to the structure.  msg is set to null if
-there is no error message.  inflateInit does not perform any decompression
-apart from possibly reading the zlib header if present: actual decompression
-will be done by inflate().  (So next_in and avail_in may be modified, but
-next_out and avail_out are unused and unchanged.) The current implementation
-of inflateInit() does not process any header information -- that is deferred
-until inflate() is called.
-*/
-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 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.
-The flush parameter of inflate() can be Z_NO_FLUSH, Z_SYNC_FLUSH, Z_FINISH,
-Z_BLOCK, or Z_TREES.  Z_SYNC_FLUSH requests that inflate() flush as much
-output as possible to the output buffer.  Z_BLOCK requests that inflate()
-stop if and when it gets to the next deflate block boundary.  When decoding
-the zlib or gzip format, this will cause inflate() to return immediately
-after the header and before the first block.  When doing a raw inflate,
-inflate() will go ahead and process the first block, and will return when it
-gets to the end of that block, or when it runs out of data.
-The Z_BLOCK option assists in appending to or combining deflate streams.
-Also to assist in this, on return inflate() will set strm->data_type to the
-number of unused bits in the last byte taken from strm->next_in, plus 64 if
-inflate() is currently decoding the last block in the deflate stream, plus
-128 if inflate() returned immediately after decoding an end-of-block code or
-decoding the complete header up to just before the first byte of the deflate
-stream.  The end-of-block will not be indicated until all of the uncompressed
-data from that block has been written to strm->next_out.  The number of
-unused bits may in general be greater than seven, except when bit 7 of
-data_type is set, in which case the number of unused bits will be less than
-eight.  data_type is set as noted here every time inflate() returns for all
-flush options, and so can be used to determine the amount of currently
-consumed input in bits.
-The Z_TREES option behaves as Z_BLOCK does, but it also returns when the
-end of each deflate block header is reached, before any actual data in that
-block is decoded.  This allows the caller to determine the length of the
-deflate block header for later use in random access within a deflate block.
-256 is added to the value of strm->data_type when inflate() returns
-immediately after reaching the end of the deflate block header.
-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 of the uncompressed data for the
-operation to complete.  (The size of the uncompressed data may have been
-saved by the compressor for this purpose.) The use of Z_FINISH is not
-required to perform an inflation in one step.  However it may be used to
-inform inflate that a faster approach can be used for the single inflate()
-call.  Z_FINISH also informs inflate to not maintain a sliding window if the
-stream completes, which reduces inflate's memory footprint.  If the stream
-does not complete, either because not all of the stream is provided or not
-enough output space is provided, then a sliding window will be allocated and
-inflate() can be called again to continue the operation as if Z_NO_FLUSH had
-been used.
-In this implementation, inflate() always flushes as much output as
-possible to the output buffer, and always uses the faster approach on the
-first call.  So the effects of the flush parameter in this implementation are
-on the return value of inflate() as noted below, when inflate() returns early
-when Z_BLOCK or Z_TREES is used, and when inflate() avoids the allocation of
-memory for a sliding window when Z_FINISH is used.
-If a preset dictionary is needed after this call (see inflateSetDictionary
-below), inflate sets strm->adler to the Adler-32 checksum of the dictionary
-chosen by the compressor and returns Z_NEED_DICT; otherwise it sets
-strm->adler to the Adler-32 checksum of all output produced so far (that is,
-total_out bytes) and returns Z_OK, Z_STREAM_END or an error code as described
-below.  At the end of the stream, inflate() checks that its computed adler32
-checksum is equal to that saved by the compressor and returns Z_STREAM_END
-only if the checksum is correct.
-inflate() can decompress and check either zlib-wrapped or gzip-wrapped
-deflate data.  The header type is detected automatically, if requested when
-initializing with inflateInit2().  Any information contained in the gzip
-header is not retained, so applications that need that information should
-instead use raw inflate, see inflateInit2() below, or inflateBack() and
-perform their own processing of the gzip header and trailer.  When processing
-gzip-wrapped deflate data, strm->adler32 is set to the CRC-32 of the output
-producted so far.  The CRC-32 is checked against the gzip trailer.
-inflate() returns Z_OK if some progress has been made (more input processed
-or more output produced), Z_STREAM_END if the end of the compressed data has
-been reached and all uncompressed output has been produced, Z_NEED_DICT if a
-preset dictionary is needed at this point, Z_DATA_ERROR if the input data was
-corrupted (input stream not conforming to the zlib format or incorrect check
-value), Z_STREAM_ERROR if the stream structure was inconsistent (for example
-next_in or next_out was Z_NULL), Z_MEM_ERROR if there was not enough memory,
-Z_BUF_ERROR if no progress is possible or if there was not enough room in the
-output buffer when Z_FINISH is used.  Note that Z_BUF_ERROR is not fatal, and
-inflate() can be called again with more input and more output space to
-continue decompressing.  If Z_DATA_ERROR is returned, the application may
-then call inflateSync() to look for a good compression block if a partial
-recovery of the data is desired.
-*/
-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.
-windowBits can also be -8..-15 for raw deflate.  In this case, -windowBits
-determines the window size.  deflate() will then generate raw deflate data
-with no zlib header or trailer, and will not compute an adler32 check value.
-windowBits can also be greater than 15 for optional gzip encoding.  Add
-16 to windowBits to write a simple gzip header and trailer around the
-compressed data instead of a zlib wrapper.  The gzip header will have no
-file name, no extra data, no comment, no modification time (set to zero), no
-header crc, and the operating system will be set to 255 (unknown).  If a
-gzip stream is being written, strm->adler is a crc32 instead of an adler32.
-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), Z_HUFFMAN_ONLY to force Huffman encoding only (no
-string match), or Z_RLE to limit match distances to one (run-length
-encoding).  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_STRATEGY and Z_HUFFMAN_ONLY.  Z_RLE is designed to be almost as
-fast as Z_HUFFMAN_ONLY, but give better compression for PNG image data.  The
-strategy parameter only affects the compression ratio but not the
-correctness of the compressed output even if it is not set appropriately.
-Z_FIXED prevents the use of dynamic Huffman codes, allowing for a simpler
-decoder for special applications.
-deflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
-memory, Z_STREAM_ERROR if any parameter is invalid (such as an invalid
-method), or 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.  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.  When using the zlib format, this
-function must be called immediately after deflateInit, deflateInit2 or
-deflateReset, and before any call of deflate.  When doing raw deflate, this
-function must be called either before any call of deflate, or immediately
-after the completion of a deflate block, i.e. after all input has been
-consumed and all output has been delivered when using any of the flush
-options Z_BLOCK, Z_PARTIAL_FLUSH, Z_SYNC_FLUSH, or Z_FULL_FLUSH.  The
-compressor and decompressor must use exactly the same dictionary (see
-inflateSetDictionary).
-The dictionary should consist of strings (byte sequences) that are likely
-to be encountered later in the data to be compressed, with the most commonly
-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
-provided in deflateInit or deflateInit2.  Thus the strings most likely to be
-useful should be put at the end of the dictionary, not at the front.  In
-addition, the current implementation of deflate will use at most the window
-size minus 262 bytes of the provided dictionary.
-Upon return of this function, strm->adler is set to the adler32 value
-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.) If a raw deflate was requested, then the
-adler32 value is not computed and strm->adler is not set.
-deflateSetDictionary returns Z_OK if success, or Z_STREAM_ERROR if a
-parameter is invalid (e.g.  dictionary being Z_NULL) or the stream state is
-inconsistent (for example if deflate has already been called for this stream
-or if not at a block boundary for raw deflate).  deflateSetDictionary does
-not perform any compression: this will be done by deflate().
-*/
-ZEXTERN int ZEXPORT deflateCopy OF((z_streamp dest,
-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 Z_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 Z_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 deflateTune OF((z_streamp strm,
-int good_length,
-int max_lazy,
-int nice_length,
-int max_chain));
-/*
-Fine tune deflate's internal compression parameters.  This should only be
-used by someone who understands the algorithm used by zlib's deflate for
-searching for the best matching string, and even then only by the most
-fanatic optimizer trying to squeeze out the last compressed bit for their
-specific input data.  Read the deflate.c source code for the meaning of the
-max_lazy, good_length, nice_length, and max_chain parameters.
-deflateTune() can be called after deflateInit() or deflateInit2(), and
-returns Z_OK on success, or Z_STREAM_ERROR for an invalid deflate stream.
-*/
-ZEXTERN uLong ZEXPORT deflateBound OF((z_streamp strm,
-uLong sourceLen));
-/*
-deflateBound() returns an upper bound on the compressed size after
-deflation of sourceLen bytes.  It must be called after deflateInit() or
-deflateInit2(), and after deflateSetHeader(), if used.  This would be used
-to allocate an output buffer for deflation in a single pass, and so would be
-called before deflate().  If that first deflate() call is provided the
-sourceLen input bytes, an output buffer allocated to the size returned by
-deflateBound(), and the flush value Z_FINISH, then deflate() is guaranteed
-to return Z_STREAM_END.  Note that it is possible for the compressed size to
-be larger than the value returned by deflateBound() if flush options other
-than Z_FINISH or Z_NO_FLUSH are used.
-*/
-ZEXTERN int ZEXPORT deflatePending OF((z_streamp strm,
-unsigned *pending,
-int *bits));
-/*
-deflatePending() returns the number of bytes and bits of output that have
-been generated, but not yet provided in the available output.  The bytes not
-provided would be due to the available output space having being consumed.
-The number of bits of output not provided are between 0 and 7, where they
-await more bits to join them in order to fill out a full byte.  If pending
-or bits are Z_NULL, then those values are not set.
-deflatePending returns Z_OK if success, or Z_STREAM_ERROR if the source
-stream state was inconsistent.
-*/
-ZEXTERN int ZEXPORT deflatePrime OF((z_streamp strm,
-int bits,
-int value));
-/*
-deflatePrime() inserts bits in the deflate output stream.  The intent
-is that this function is used to start off the deflate output with the bits
-leftover from a previous deflate stream when appending to it.  As such, this
-function can only be used for raw deflate, and must be used before the first
-deflate() call after a deflateInit2() or deflateReset().  bits must be less
-than or equal to 16, and that many of the least significant bits of value
-will be inserted in the output.
-deflatePrime returns Z_OK if success, Z_BUF_ERROR if there was not enough
-room in the internal buffer to insert the bits, or Z_STREAM_ERROR if the
-source stream state was inconsistent.
-*/
-ZEXTERN int ZEXPORT deflateSetHeader OF((z_streamp strm,
-gz_headerp head));
-/*
-deflateSetHeader() provides gzip header information for when a gzip
-stream is requested by deflateInit2().  deflateSetHeader() may be called
-after deflateInit2() or deflateReset() and before the first call of
-deflate().  The text, time, os, extra field, name, and comment information
-in the provided gz_header structure are written to the gzip header (xflag is
-ignored -- the extra flags are set according to the compression level).  The
-caller must assure that, if not Z_NULL, name and comment are terminated with
-a zero byte, and that if extra is not Z_NULL, that extra_len bytes are
-available there.  If hcrc is true, a gzip header crc is included.  Note that
-the current versions of the command-line version of gzip (up through version
-1.3.x) do not support header crc's, and will report that it is a "multi-part
-gzip file" and give up.
-If deflateSetHeader is not used, the default gzip header has text false,
-the time set to zero, and os set to 255, with no extra, name, or comment
-fields.  The gzip header is returned to the default state by deflateReset().
-deflateSetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source
-stream state was inconsistent.
-*/
-/*
-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.  windowBits must be greater than or equal to the windowBits value
-provided to deflateInit2() while compressing, or it must be equal to 15 if
-deflateInit2() was not used.  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.
-windowBits can also be zero to request that inflate use the window size in
-the zlib header of the compressed stream.
-windowBits can also be -8..-15 for raw inflate.  In this case, -windowBits
-determines the window size.  inflate() will then process raw deflate data,
-not looking for a zlib or gzip header, not generating a check value, and not
-looking for any check values for comparison at the end of the stream.  This
-is for use with other formats that use the deflate compressed data format
-such as zip.  Those formats provide their own check values.  If a custom
-format is developed using the raw deflate format for compressed data, it is
-recommended that a check value such as an adler32 or a crc32 be applied to
-the uncompressed data as is done in the zlib, gzip, and zip formats.  For
-most applications, the zlib format should be used as is.  Note that comments
-above on the use in deflateInit2() applies to the magnitude of windowBits.
-windowBits can also be greater than 15 for optional gzip decoding.  Add
-32 to windowBits to enable zlib and gzip decoding with automatic header
-detection, or add 16 to decode only the gzip format (the zlib format will
-return a Z_DATA_ERROR).  If a gzip stream is being decoded, strm->adler is a
-crc32 instead of an adler32.
-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
-version assumed by the caller, or Z_STREAM_ERROR if the parameters are
-invalid, such as a null pointer to the structure.  msg is set to null if
-there is no error message.  inflateInit2 does not perform any decompression
-apart from possibly reading the zlib header if present: actual decompression
-will be done by inflate().  (So next_in and avail_in may be modified, but
-next_out and avail_out are unused and unchanged.) The current implementation
-of inflateInit2() does not process any header information -- that is
-deferred until inflate() is called.
-*/
-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 that call returned Z_NEED_DICT.  The dictionary chosen by the compressor
-can be determined from the adler32 value returned by that call of inflate.
-The compressor and decompressor must use exactly the same dictionary (see
-deflateSetDictionary).  For raw inflate, this function can be called at any
-time to set the dictionary.  If the provided dictionary is smaller than the
-window and there is already data in the window, then the provided dictionary
-will amend what's there.  The application must insure that the dictionary
-that was used for compression is provided.
-inflateSetDictionary returns Z_OK if success, Z_STREAM_ERROR if a
-parameter is invalid (e.g.  dictionary being Z_NULL) or the stream state is
-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 inflateGetDictionary OF((z_streamp strm,
-Bytef *dictionary,
-uInt  *dictLength));
-/*
-Returns the sliding dictionary being maintained by inflate.  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 inflateGetDictionary() 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.
-inflateGetDictionary returns Z_OK on success, or Z_STREAM_ERROR if the
-stream state is inconsistent.
-*/
-ZEXTERN int ZEXPORT inflateSync OF((z_streamp strm));
-/*
-Skips invalid compressed data until a possible full flush point (see above
-for the description of deflate with Z_FULL_FLUSH) can be found, or until all
-available input is skipped.  No output is provided.
-inflateSync searches for a 00 00 FF FF pattern in the compressed data.
-All full flush points have this pattern, but not all occurrences of this
-pattern are full flush points.
-inflateSync returns Z_OK if a possible full flush point has been found,
-Z_BUF_ERROR if no more input was provided, Z_DATA_ERROR if no flush point
-has been found, or Z_STREAM_ERROR if the stream structure was inconsistent.
-In the success case, the application may save the current current value of
-total_in which indicates where valid compressed data was found.  In the
-error case, the application may repeatedly call inflateSync, providing more
-input each time, until success or end of the input data.
-*/
-ZEXTERN int ZEXPORT inflateCopy OF((z_streamp dest,
-z_streamp source));
-/*
-Sets the destination stream as a complete copy of the source stream.
-This function can be useful when randomly accessing a large stream.  The
-first pass through the stream can periodically record the inflate state,
-allowing restarting inflate at those points when randomly accessing the
-stream.
-inflateCopy 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 Z_NULL).  msg is left unchanged in both source and
-destination.
-*/
-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 Z_NULL).
-*/
-ZEXTERN int ZEXPORT inflateReset2 OF((z_streamp strm,
-int windowBits));
-/*
-This function is the same as inflateReset, but it also permits changing
-the wrap and window size requests.  The windowBits parameter is interpreted
-the same as it is for inflateInit2.
-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
-the windowBits parameter is invalid.
-*/
-ZEXTERN int ZEXPORT inflatePrime OF((z_streamp strm,
-int bits,
-int value));
-/*
-This function inserts bits in the inflate input stream.  The intent is
-that this function is used to start inflating at a bit position in the
-middle of a byte.  The provided bits will be used before any bytes are used
-from next_in.  This function should only be used with raw inflate, and
-should be used before the first inflate() call after inflateInit2() or
-inflateReset().  bits must be less than or equal to 16, and that many of the
-least significant bits of value will be inserted in the input.
-If bits is negative, then the input stream bit buffer is emptied.  Then
-inflatePrime() can be called again to put bits in the buffer.  This is used
-to clear out bits leftover after feeding inflate a block description prior
-to feeding inflate codes.
-inflatePrime returns Z_OK if success, or Z_STREAM_ERROR if the source
-stream state was inconsistent.
-*/
-ZEXTERN long ZEXPORT inflateMark OF((z_streamp strm));
-/*
-This function returns two values, one in the lower 16 bits of the return
-value, and the other in the remaining upper bits, obtained by shifting the
-return value down 16 bits.  If the upper value is -1 and the lower value is
-zero, then inflate() is currently decoding information outside of a block.
-If the upper value is -1 and the lower value is non-zero, then inflate is in
-the middle of a stored block, with the lower value equaling the number of
-bytes from the input remaining to copy.  If the upper value is not -1, then
-it is the number of bits back from the current bit position in the input of
-the code (literal or length/distance pair) currently being processed.  In
-that case the lower value is the number of bytes already emitted for that
-code.
-A code is being processed if inflate is waiting for more input to complete
-decoding of the code, or if it has completed decoding but is waiting for
-more output space to write the literal or match data.
-inflateMark() is used to mark locations in the input data for random
-access, which may be at bit positions, and to note those cases where the
-output of a code may span boundaries of random access blocks.  The current
-location in the input stream can be determined from avail_in and data_type
-as noted in the description for the Z_BLOCK flush parameter for inflate.
-inflateMark returns the value noted above or -1 << 16 if the provided
-source stream state was inconsistent.
-*/
-ZEXTERN int ZEXPORT inflateGetHeader OF((z_streamp strm,
-gz_headerp head));
-/*
-inflateGetHeader() requests that gzip header information be stored in the
-provided gz_header structure.  inflateGetHeader() may be called after
-inflateInit2() or inflateReset(), and before the first call of inflate().
-As inflate() processes the gzip stream, head->done is zero until the header
-is completed, at which time head->done is set to one.  If a zlib stream is
-being decoded, then head->done is set to -1 to indicate that there will be
-no gzip header information forthcoming.  Note that Z_BLOCK or Z_TREES can be
-used to force inflate() to return immediately after header processing is
-complete and before any actual data is decompressed.
-The text, time, xflags, and os fields are filled in with the gzip header
-contents.  hcrc is set to true if there is a header CRC.  (The header CRC
-was valid if done is set to one.) If extra is not Z_NULL, then extra_max
-contains the maximum number of bytes to write to extra.  Once done is true,
-extra_len contains the actual extra field length, and extra contains the
-extra field, or that field truncated if extra_max is less than extra_len.
-If name is not Z_NULL, then up to name_max characters are written there,
-terminated with a zero unless the length is greater than name_max.  If
-comment is not Z_NULL, then up to comm_max characters are written there,
-terminated with a zero unless the length is greater than comm_max.  When any
-of extra, name, or comment are not Z_NULL and the respective field is not
-present in the header, then that field is set to Z_NULL to signal its
-absence.  This allows the use of deflateSetHeader() with the returned
-structure to duplicate the header.  However if those fields are set to
-allocated memory, then the application will need to save those pointers
-elsewhere so that they can be eventually freed.
-If inflateGetHeader is not used, then the header information is simply
-discarded.  The header is always checked for validity, including the header
-CRC if present.  inflateReset() will reset the process to discard the header
-information.  The application would need to call inflateGetHeader() again to
-retrieve the header from the next gzip stream.
-inflateGetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source
-stream state was inconsistent.
-*/
-/*
-ZEXTERN int ZEXPORT inflateBackInit OF((z_streamp strm, int windowBits,
-unsigned char FAR *window));
-Initialize the internal stream state for decompression using inflateBack()
-calls.  The fields zalloc, zfree and opaque in strm must be initialized
-before the call.  If zalloc and zfree are Z_NULL, then the default library-
-derived memory allocation routines are used.  windowBits is the base two
-logarithm of the window size, in the range 8..15.  window is a caller
-supplied buffer of that size.  Except for special applications where it is
-assured that deflate was used with small window sizes, windowBits must be 15
-and a 32K byte window must be supplied to be able to decompress general
-deflate streams.
-See inflateBack() for the usage of these routines.
-inflateBackInit will return Z_OK on success, Z_STREAM_ERROR if any of
-the parameters are invalid, Z_MEM_ERROR if the internal state could not be
-allocated, or Z_VERSION_ERROR if the version of the library does not match
-the version of the header file.
-*/
-typedef unsigned (*in_func) OF((void FAR *,
-z_const unsigned char FAR * FAR *));
-typedef int (*out_func) OF((void FAR *, unsigned char FAR *, unsigned));
-ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm,
-in_func in, void FAR *in_desc,
-out_func out, void FAR *out_desc));
-/*
-inflateBack() does a raw inflate with a single call using a call-back
-interface for input and output.  This is potentially more efficient than
-inflate() for file i/o applications, in that it avoids copying between the
-output and the sliding window by simply making the window itself the output
-buffer.  inflate() can be faster on modern CPUs when used with large
-buffers.  inflateBack() trusts the application to not change the output
-buffer passed by the output function, at least until inflateBack() returns.
-inflateBackInit() must be called first to allocate the internal state
-and to initialize the state with the user-provided window buffer.
-inflateBack() may then be used multiple times to inflate a complete, raw
-deflate stream with each call.  inflateBackEnd() is then called to free the
-allocated state.
-A raw deflate stream is one with no zlib or gzip header or trailer.
-This routine would normally be used in a utility that reads zip or gzip
-files and writes out uncompressed files.  The utility would decode the
-header and process the trailer on its own, hence this routine expects only
-the raw deflate stream to decompress.  This is different from the normal
-behavior of inflate(), which expects either a zlib or gzip header and
-trailer around the deflate stream.
-inflateBack() uses two subroutines supplied by the caller that are then
-called by inflateBack() for input and output.  inflateBack() calls those
-routines until it reads a complete deflate stream and writes out all of the
-uncompressed data, or until it encounters an error.  The function's
-parameters and return types are defined above in the in_func and out_func
-typedefs.  inflateBack() will call in(in_desc, &buf) which should return the
-number of bytes of provided input, and a pointer to that input in buf.  If
-there is no input available, in() must return zero--buf is ignored in that
-case--and inflateBack() will return a buffer error.  inflateBack() will call
-out(out_desc, buf, len) to write the uncompressed data buf[0..len-1].  out()
-should return zero on success, or non-zero on failure.  If out() returns
-non-zero, inflateBack() will return with an error.  Neither in() nor out()
-are permitted to change the contents of the window provided to
-inflateBackInit(), which is also the buffer that out() uses to write from.
-The length written by out() will be at most the window size.  Any non-zero
-amount of input may be provided by in().
-For convenience, inflateBack() can be provided input on the first call by
-setting strm->next_in and strm->avail_in.  If that input is exhausted, then
-in() will be called.  Therefore strm->next_in must be initialized before
-calling inflateBack().  If strm->next_in is Z_NULL, then in() will be called
-immediately for input.  If strm->next_in is not Z_NULL, then strm->avail_in
-must also be initialized, and then if strm->avail_in is not zero, input will
-initially be taken from strm->next_in[0 ..  strm->avail_in - 1].
-The in_desc and out_desc parameters of inflateBack() is passed as the
-first parameter of in() and out() respectively when they are called.  These
-descriptors can be optionally used to pass any information that the caller-
-supplied in() and out() functions need to do their job.
-On return, inflateBack() will set strm->next_in and strm->avail_in to
-pass back any unused input that was provided by the last in() call.  The
-return values of inflateBack() can be Z_STREAM_END on success, Z_BUF_ERROR
-if in() or out() returned an error, Z_DATA_ERROR if there was a format error
-in the deflate stream (in which case strm->msg is set to indicate the nature
-of the error), or Z_STREAM_ERROR if the stream was not properly initialized.
-In the case of Z_BUF_ERROR, an input or output error can be distinguished
-using strm->next_in which will be Z_NULL only if in() returned an error.  If
-strm->next_in is not Z_NULL, then the Z_BUF_ERROR was due to out() returning
-non-zero.  (in() will always be called before out(), so strm->next_in is
-assured to be defined if out() returns non-zero.) Note that inflateBack()
-cannot return Z_OK.
-*/
-ZEXTERN int ZEXPORT inflateBackEnd OF((z_streamp strm));
-/*
-All memory allocated by inflateBackInit() is freed.
-inflateBackEnd() returns Z_OK on success, or Z_STREAM_ERROR if the stream
-state was inconsistent.
-*/
-ZEXTERN uLong ZEXPORT zlibCompileFlags OF((void));
-/* Return flags indicating compile-time options.
-Type sizes, two bits each, 00 = 16 bits, 01 = 32, 10 = 64, 11 = other:
-1.0: size of uInt
-3.2: size of uLong
-5.4: size of voidpf (pointer)
-7.6: size of z_off_t
-Compiler, assembler, and debug options:
-8: DEBUG
-9: ASMV or ASMINF -- use ASM code
-10: ZLIB_WINAPI -- exported functions use the WINAPI calling convention
-11: 0 (reserved)
-One-time table building (smaller code, but not thread-safe if true):
-12: BUILDFIXED -- build static block decoding tables when needed
-13: DYNAMIC_CRC_TABLE -- build CRC calculation tables when needed
-14,15: 0 (reserved)
-Library content (indicates missing functionality):
-16: NO_GZCOMPRESS -- gz* functions cannot compress (to avoid linking
-deflate code when not needed)
-17: NO_GZIP -- deflate can't write gzip streams, and inflate can't detect
-and decode gzip streams (to avoid linking crc code)
-18-19: 0 (reserved)
-Operation variations (changes in library functionality):
-20: PKZIP_BUG_WORKAROUND -- slightly more permissive inflate
-21: FASTEST -- deflate algorithm with only one, lowest compression level
-22,23: 0 (reserved)
-The sprintf variant used by gzprintf (zero is best):
-24: 0 = vs*, 1 = s* -- 1 means limited to 20 arguments after the format
-25: 0 = *nprintf, 1 = *printf -- 1 means gzprintf() not secure!
-26: 0 = returns value, 1 = void -- 1 means inferred string length returned
-Remainder:
-27-31: 0 (reserved)
-*/
-#ifndef Z_SOLO
-/* 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 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 the value returned by
-compressBound(sourceLen).  Upon exit, destLen is the actual size of the
-compressed buffer.
-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 the value returned by
-compressBound(sourceLen).  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 uLong ZEXPORT compressBound OF((uLong sourceLen));
-/*
-compressBound() returns an upper bound on the compressed size after
-compress() or compress2() on sourceLen bytes.  It would be used before a
-compress() or compress2() call to allocate the destination buffer.
-*/
-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 uncompressed buffer.
-uncompress returns Z_OK if success, Z_MEM_ERROR if there was not
-enough memory, Z_BUF_ERROR if there was not enough room in the output
-buffer, or Z_DATA_ERROR if the input data was corrupted or incomplete.  In
-the case where there is not enough room, uncompress() will fill the output
-buffer with the uncompressed data up to that point.
-*/
-/* gzip file access functions */
-/*
-This library supports reading and writing files in gzip (.gz) format with
-an interface similar to that of stdio, using the functions that start 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.
-*/
-typedef struct gzFile_s *gzFile;    /* semi-opaque gzip file descriptor */
-/*
-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", 'R' for run-length encoding as in "wb1R", or 'F'
-for fixed code compression as in "wb9F".  (See the description of
-deflateInit2 for more information about the strategy parameter.)  'T' will
-request transparent writing or appending with no compression and not using
-the gzip format.
-"a" can be used instead of "w" to request that the gzip stream that will
-be written be appended to the file.  "+" will result in an error, since
-reading and writing to the same gzip file is not supported.  The addition of
-"x" when writing will create the file exclusively, which fails if the file
-already exists.  On systems that support it, the addition of "e" when
-reading or writing will set the flag to close the file on an execve() call.
-These functions, as well as gzip, will read and decode a sequence of gzip
-streams in a file.  The append function of gzopen() can be used to create
-such a file.  (Also see gzflush() for another way to do this.)  When
-appending, gzopen does not test whether the file begins with a gzip stream,
-nor does it look for the end of the gzip streams to begin appending.  gzopen
-will simply append a gzip stream to the existing file.
-gzopen can be used to read a file which is not in gzip format; in this
-case gzread will directly read from the file without decompression.  When
-reading, this will be detected automatically by looking for the magic two-
-byte gzip header.
-gzopen returns NULL if the file could not be opened, if there was
-insufficient memory to allocate the gzFile state, or if an invalid mode was
-specified (an 'r', 'w', or 'a' was not provided, or '+' was provided).
-errno can be checked to determine if the reason gzopen failed was that the
-file could not be opened.
-*/
-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 (if 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 fd = dup(fd_keep); gz = gzdopen(fd,
-mode);.  The duplicated descriptor should be saved to avoid a leak, since
-gzdopen does not close fd if it fails.  If you are using fileno() to get the
-file descriptor from a FILE *, then you will have to use dup() to avoid
-double-close()ing the file descriptor.  Both gzclose() and fclose() will
-close the associated file descriptor, so they need to have different file
-descriptors.
-gzdopen returns NULL if there was insufficient memory to allocate the
-gzFile state, if an invalid mode was specified (an 'r', 'w', or 'a' was not
-provided, or '+' was provided), or if fd is -1.  The file descriptor is not
-used until the next gz* read, write, seek, or close operation, so gzdopen
-will not detect if fd is invalid (unless fd is -1).
-*/
-ZEXTERN int ZEXPORT gzbuffer OF((gzFile file, unsigned size));
-/*
-Set the internal buffer size used by this library's functions.  The
-default buffer size is 8192 bytes.  This function must be called after
-gzopen() or gzdopen(), and before any other calls that read or write the
-file.  The buffer memory allocation is always deferred to the first read or
-write.  Two buffers are allocated, either both of the specified size when
-writing, or one of the specified size and the other twice that size when
-reading.  A larger buffer size of, for example, 64K or 128K bytes will
-noticeably increase the speed of decompression (reading).
-The new buffer size also affects the maximum length for gzprintf().
-gzbuffer() returns 0 on success, or -1 on failure, such as being called
-too late.
-*/
-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 is not in gzip format, gzread copies the given number of
-bytes into the buffer directly from the file.
-After reaching the end of a gzip stream in the input, gzread will continue
-to read, looking for another gzip stream.  Any number of gzip streams may be
-concatenated in the input file, and will all be decompressed by gzread().
-If something other than a gzip stream is encountered after a gzip stream,
-that remaining trailing garbage is ignored (and no error is returned).
-gzread can be used to read a gzip file that is being concurrently written.
-Upon reaching the end of the input, gzread will return with the available
-data.  If the error code returned by gzerror is Z_OK or Z_BUF_ERROR, then
-gzclearerr can be used to clear the end of file indicator in order to permit
-gzread to be tried again.  Z_OK indicates that a gzip stream was completed
-on the last gzread.  Z_BUF_ERROR indicates that the input file ended in the
-middle of a gzip stream.  Note that gzread does not return -1 in the event
-of an incomplete gzip stream.  This error is deferred until gzclose(), which
-will return Z_BUF_ERROR if the last gzread ended in the middle of a gzip
-stream.  Alternatively, gzerror can be used before gzclose to detect this
-case.
-gzread returns the number of uncompressed bytes actually read, less than
-len for end of file, or -1 for error.
-*/
-ZEXTERN int ZEXPORT gzwrite OF((gzFile file,
-voidpc buf, unsigned len));
-/*
-Writes the given number of uncompressed bytes into the compressed file.
-gzwrite returns the number of uncompressed bytes written or 0 in case of
-error.
-*/
-ZEXTERN int ZEXPORTVA gzprintf Z_ARG((gzFile file, const char *format, ...));
-/*
-Converts, formats, and writes the arguments to the compressed file under
-control of the format string, as in fprintf.  gzprintf returns the number of
-uncompressed bytes actually written, or 0 in case of error.  The number of
-uncompressed bytes written is limited to 8191, or one less than the buffer
-size given to gzbuffer().  The caller should assure that this limit is not
-exceeded.  If it is exceeded, then gzprintf() will return an error (0) with
-nothing written.  In this case, there may also be a buffer overflow with
-unpredictable consequences, which is possible only if zlib was compiled with
-the insecure functions sprintf() or vsprintf() because the secure snprintf()
-or vsnprintf() functions were not available.  This can be determined using
-zlibCompileFlags().
-*/
-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.  If any characters are read or if len == 1, the
-string is terminated with a null character.  If no characters are read due
-to an end-of-file or len < 1, then the buffer is left untouched.
-gzgets returns buf which is a null-terminated string, or it returns NULL
-for end-of-file or in case of error.  If there was an error, the contents at
-buf are indeterminate.
-*/
-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.  This is implemented as a macro for speed.
-As such, it does not do all of the checking the other functions do.  I.e.
-it does not check to see if file is NULL, nor whether the structure file
-points to has been clobbered or not.
-*/
-ZEXTERN int ZEXPORT gzungetc OF((int c, gzFile file));
-/*
-Push one character back onto the stream to be read as the first character
-on the next read.  At least one character of push-back is allowed.
-gzungetc() returns the character pushed, or -1 on failure.  gzungetc() will
-fail if c is -1, and may fail if a character has been pushed but not read
-yet.  If gzungetc is used immediately after gzopen or gzdopen, at least the
-output buffer size of pushed characters is allowed.  (See gzbuffer above.)
-The pushed character will be discarded if the stream is repositioned with
-gzseek() or gzrewind().
-*/
-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 is only permitted when writing.
-If the flush parameter is Z_FINISH, the remaining data is written and the
-gzip stream is completed in the output.  If gzwrite() is called again, a new
-gzip stream will be started in the output.  gzread() is able to read such
-concatented gzip streams.
-gzflush should be called only when strictly necessary because it will
-degrade compression if called too often.
-*/
-/*
-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, and is zero when starting, even if appending or
-reading a gzip stream from the middle of a file using gzdopen().
-gztell(file) is equivalent to gzseek(file, 0L, SEEK_CUR)
-*/
-/*
-ZEXTERN z_off_t ZEXPORT gzoffset OF((gzFile file));
-Returns the current offset in the file being read or written.  This offset
-includes the count of bytes that precede the gzip stream, for example when
-appending or when using gzdopen() for reading.  When reading, the offset
-does not include as yet unused buffered input.  This information can be used
-for a progress indicator.  On error, gzoffset() returns -1.
-*/
-ZEXTERN int ZEXPORT gzeof OF((gzFile file));
-/*
-Returns true (1) if the end-of-file indicator has been set while reading,
-false (0) otherwise.  Note that the end-of-file indicator is set only if the
-read tried to go past the end of the input, but came up short.  Therefore,
-just like feof(), gzeof() may return false even if there is no more data to
-read, in the event that the last read request was for the exact number of
-bytes remaining in the input file.  This will happen if the input file size
-is an exact multiple of the buffer size.
-If gzeof() returns true, then the read functions will return no more data,
-unless the end-of-file indicator is reset by gzclearerr() and the input file
-has grown since the previous end of file was detected.
-*/
-ZEXTERN int ZEXPORT gzdirect OF((gzFile file));
-/*
-Returns true (1) if file is being copied directly while reading, or false
-(0) if file is a gzip stream being decompressed.
-If the input file is empty, gzdirect() will return true, since the input
-does not contain a gzip stream.
-If gzdirect() is used immediately after gzopen() or gzdopen() it will
-cause buffers to be allocated to allow reading the file to determine if it
-is a gzip file.  Therefore if gzbuffer() is used, it should be called before
-gzdirect().
-When writing, gzdirect() returns true (1) if transparent writing was
-requested ("wT" for the gzopen() mode), or false (0) otherwise.  (Note:
-gzdirect() is not needed when writing.  Transparent writing must be
-explicitly requested, so the application already knows the answer.  When
-linking statically, using gzdirect() will include all of the zlib code for
-gzip file reading and decompression, which may not be desired.)
-*/
-ZEXTERN int ZEXPORT    gzclose OF((gzFile file));
-/*
-Flushes all pending output if necessary, closes the compressed file and
-deallocates the (de)compression state.  Note that once file is closed, you
-cannot call gzerror with file, since its structures have been deallocated.
-gzclose must not be called more than once on the same file, just as free
-must not be called more than once on the same allocation.
-gzclose will return Z_STREAM_ERROR if file is not valid, Z_ERRNO on a
-file operation error, Z_MEM_ERROR if out of memory, Z_BUF_ERROR if the
-last read ended in the middle of a gzip stream, or Z_OK on success.
-*/
-ZEXTERN int ZEXPORT gzclose_r OF((gzFile file));
-ZEXTERN int ZEXPORT gzclose_w OF((gzFile file));
-/*
-Same as gzclose(), but gzclose_r() is only for use when reading, and
-gzclose_w() is only for use when writing or appending.  The advantage to
-using these instead of gzclose() is that they avoid linking in zlib
-compression or decompression code that is not used when only reading or only
-writing respectively.  If gzclose() is used, then both compression and
-decompression code will be included the application when linking to a static
-zlib library.
-*/
-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.
-The application must not modify the returned string.  Future calls to
-this function may invalidate the previously returned string.  If file is
-closed, then the string previously returned by gzerror will no longer be
-available.
-gzerror() should be used to distinguish errors from end-of-file for those
-functions above that do not distinguish those cases in their return values.
-*/
-ZEXTERN void ZEXPORT gzclearerr OF((gzFile file));
-/*
-Clears the error and end-of-file flags for file.  This is analogous to the
-clearerr() function in stdio.  This is useful for continuing to read a gzip
-file that is being written concurrently.
-*/
-#endif /* !Z_SOLO */
-/* 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 Z_NULL, this function returns the
-required initial value for the checksum.
-An Adler-32 checksum is almost as reliable as a CRC32 but can be computed
-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 adler32_combine OF((uLong adler1, uLong adler2,
-z_off_t len2));
-Combine two Adler-32 checksums into one.  For two sequences of bytes, seq1
-and seq2 with lengths len1 and len2, Adler-32 checksums were calculated for
-each, adler1 and adler2.  adler32_combine() returns the Adler-32 checksum of
-seq1 and seq2 concatenated, requiring only adler1, adler2, and len2.  Note
-that the z_off_t type (like off_t) is a signed integer.  If len2 is
-negative, the result has no meaning or utility.
-*/
-ZEXTERN uLong ZEXPORT crc32   OF((uLong crc, const Bytef *buf, uInt len));
-/*
-Update a running CRC-32 with the bytes buf[0..len-1] and return the
-updated CRC-32.  If buf is Z_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();
-*/
-/*
-ZEXTERN uLong ZEXPORT crc32_combine OF((uLong crc1, uLong crc2, z_off_t len2));
-Combine two CRC-32 check values into one.  For two sequences of bytes,
-seq1 and seq2 with lengths len1 and len2, CRC-32 check values were
-calculated for each, crc1 and crc2.  crc32_combine() returns the CRC-32
-check value of seq1 and seq2 concatenated, requiring only crc1, crc2, and
-len2.
-*/
-/* 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));
-ZEXTERN int ZEXPORT inflateBackInit_ OF((z_streamp strm, int windowBits,
-unsigned char FAR *window,
-const char *version,
-int stream_size));
-#define deflateInit(strm, level) \
-deflateInit_((strm), (level), ZLIB_VERSION, (int)sizeof(z_stream))
-#define inflateInit(strm) \
-inflateInit_((strm), ZLIB_VERSION, (int)sizeof(z_stream))
-#define deflateInit2(strm, level, method, windowBits, memLevel, strategy) \
-deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\
-(strategy), ZLIB_VERSION, (int)sizeof(z_stream))
-#define inflateInit2(strm, windowBits) \
-inflateInit2_((strm), (windowBits), ZLIB_VERSION, \
-(int)sizeof(z_stream))
-#define inflateBackInit(strm, windowBits, window) \
-inflateBackInit_((strm), (windowBits), (window), \
-ZLIB_VERSION, (int)sizeof(z_stream))
-#ifndef Z_SOLO
-/* gzgetc() macro and its supporting function and exposed data structure.  Note
-* that the real internal state is much larger than the exposed structure.
-* This abbreviated structure exposes just enough for the gzgetc() macro.  The
-* user should not mess with these exposed elements, since their names or
-* behavior could change in the future, perhaps even capriciously.  They can
-* only be used by the gzgetc() macro.  You have been warned.
-*/
-struct gzFile_s {
-unsigned have;
-unsigned char *next;
-z_off64_t pos;
-};
-ZEXTERN int ZEXPORT gzgetc_ OF((gzFile file));  /* backward compatibility */
-#ifdef Z_PREFIX_SET
-#  undef z_gzgetc
-#  define z_gzgetc(g) \
-((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) : gzgetc(g))
-#else
-#  define gzgetc(g) \
-((g)->have ? ((g)->have--, (g)->pos++, *((g)->next)++) : gzgetc(g))
-#endif
-/* provide 64-bit offset functions if _LARGEFILE64_SOURCE defined, and/or
-* change the regular functions to 64 bits if _FILE_OFFSET_BITS is 64 (if
-* both are true, the application gets the *64 functions, and the regular
-* functions are changed to 64 bits) -- in case these are set on systems
-* without large file support, _LFS64_LARGEFILE must also be true
-*/
-#ifdef Z_LARGE64
-ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *));
-ZEXTERN z_off64_t ZEXPORT gzseek64 OF((gzFile, z_off64_t, int));
-ZEXTERN z_off64_t ZEXPORT gztell64 OF((gzFile));
-ZEXTERN z_off64_t ZEXPORT gzoffset64 OF((gzFile));
-ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off64_t));
-ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off64_t));
-#endif
-#if !defined(ZLIB_INTERNAL) && defined(Z_WANT64)
-#  ifdef Z_PREFIX_SET
-#    define z_gzopen z_gzopen64
-#    define z_gzseek z_gzseek64
-#    define z_gztell z_gztell64
-#    define z_gzoffset z_gzoffset64
-#    define z_adler32_combine z_adler32_combine64
-#    define z_crc32_combine z_crc32_combine64
-#  else
-#    define gzopen gzopen64
-#    define gzseek gzseek64
-#    define gztell gztell64
-#    define gzoffset gzoffset64
-#    define adler32_combine adler32_combine64
-#    define crc32_combine crc32_combine64
-#  endif
-#  ifndef Z_LARGE64
-ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *));
-ZEXTERN z_off_t ZEXPORT gzseek64 OF((gzFile, z_off_t, int));
-ZEXTERN z_off_t ZEXPORT gztell64 OF((gzFile));
-ZEXTERN z_off_t ZEXPORT gzoffset64 OF((gzFile));
-ZEXTERN uLong ZEXPORT adler32_combine64 OF((uLong, uLong, z_off_t));
-ZEXTERN uLong ZEXPORT crc32_combine64 OF((uLong, uLong, z_off_t));
-#  endif
-#else
-ZEXTERN gzFile ZEXPORT gzopen OF((const char *, const char *));
-ZEXTERN z_off_t ZEXPORT gzseek OF((gzFile, z_off_t, int));
-ZEXTERN z_off_t ZEXPORT gztell OF((gzFile));
-ZEXTERN z_off_t ZEXPORT gzoffset OF((gzFile));
-ZEXTERN uLong ZEXPORT adler32_combine OF((uLong, uLong, z_off_t));
-ZEXTERN uLong ZEXPORT crc32_combine OF((uLong, uLong, z_off_t));
-#endif
-#else /* Z_SOLO */
-ZEXTERN uLong ZEXPORT adler32_combine OF((uLong, uLong, z_off_t));
-ZEXTERN uLong ZEXPORT crc32_combine OF((uLong, uLong, z_off_t));
-#endif /* !Z_SOLO */
-/* hack for buggy compilers */
-#if !defined(ZUTIL_H) && !defined(NO_DUMMY_DECL)
-struct internal_state {int dummy;};
-#endif
-/* undocumented functions */
-ZEXTERN const char   * ZEXPORT zError           OF((int));
-ZEXTERN int            ZEXPORT inflateSyncPoint OF((z_streamp));
-ZEXTERN const z_crc_t FAR * ZEXPORT get_crc_table    OF((void));
-ZEXTERN int            ZEXPORT inflateUndermine OF((z_streamp, int));
-ZEXTERN int            ZEXPORT inflateResetKeep OF((z_streamp));
-ZEXTERN int            ZEXPORT deflateResetKeep OF((z_streamp));
-#if defined(_WIN32) && !defined(Z_SOLO)
-ZEXTERN gzFile         ZEXPORT gzopen_w OF((const wchar_t *path,
-const char *mode));
-#endif
-#if defined(STDC) || defined(Z_HAVE_STDARG_H)
-#  ifndef Z_SOLO
-ZEXTERN int            ZEXPORTVA gzvprintf Z_ARG((gzFile file,
-const char *format,
-va_list va));
-#  endif
-#endif
-#ifdef __cplusplus
-}
-#endif
-#endif /* ZLIB_H */

changeset 44221	a26be46f6bac
parent 44170	40f9a2b0c304
parent 43915	4a79ad46e578
child 44223	14252cb702f5