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version 1.1, 2012/02/17 15:09:30	version 1.1.1.2, 2013/10/14 07:51:14
Line 1	Line 1
/* zlib.h -- interface of the 'zlib' general purpose compression library	/* zlib.h -- interface of the 'zlib' general purpose compression library
version 1.2.3, July 18th, 2005	version 1.2.8, April 28th, 2013

Copyright (C) 1995-2005 Jean-loup Gailly and Mark Adler	Copyright (C) 1995-2013 Jean-loup Gailly and Mark Adler

This software is provided 'as-is', without any express or implied	This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages	warranty. In no event will the authors be held liable for any damages
Line 24	Line 24


The data format used by the zlib library is described by RFCs (Request for	The data format used by the zlib library is described by RFCs (Request for
Comments) 1950 to 1952 in the files http://www.ietf.org/rfc/rfc1950.txt	Comments) 1950 to 1952 in the files http://tools.ietf.org/html/rfc1950
(zlib format), rfc1951.txt (deflate format) and rfc1952.txt (gzip format).	(zlib format), rfc1951 (deflate format) and rfc1952 (gzip format).
*/	*/

#ifndef ZLIB_H	#ifndef ZLIB_H
Line 37	Line 37
extern "C" {	extern "C" {
#endif	#endif

#define ZLIB_VERSION "1.2.3"	#define ZLIB_VERSION "1.2.8"
#define ZLIB_VERNUM 0x1230	#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	The 'zlib' compression library provides in-memory compression and
decompression functions, including integrity checks of the uncompressed	decompression functions, including integrity checks of the uncompressed data.
data. This version of the library supports only one compression method	This version of the library supports only one compression method (deflation)
(deflation) but other algorithms will be added later and will have the same	but other algorithms will be added later and will have the same stream
stream interface.	interface.

Compression can be done in a single step if the buffers are large	Compression can be done in a single step if the buffers are large enough,
enough (for example if an input file is mmap'ed), or can be done by	or can be done by repeated calls of the compression function. In the latter
repeated calls of the compression function. In the latter case, the	case, the application must provide more input and/or consume the output
application must provide more input and/or consume the output
(providing more output space) before each call.	(providing more output space) before each call.

The compressed data format used by default by the in-memory functions is	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	the zlib format, which is a zlib wrapper documented in RFC 1950, wrapped
around a deflate stream, which is itself documented in RFC 1951.	around a deflate stream, which is itself documented in RFC 1951.

The library also supports reading and writing files in gzip (.gz) format	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 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	with "gz". The gzip format is different from the zlib format. gzip is a
gzip wrapper, documented in RFC 1952, wrapped around a deflate stream.	gzip wrapper, documented in RFC 1952, wrapped around a deflate stream.

This library can optionally read and write gzip streams in memory as well.	This library can optionally read and write gzip streams in memory as well.

The zlib format was designed to be compact and fast for use in memory	The zlib format was designed to be compact and fast for use in memory
and on communications channels. The gzip format was designed for single-	and on communications channels. The gzip format was designed for single-
file compression on file systems, has a larger header than zlib to maintain	file compression on file systems, has a larger header than zlib to maintain
directory information, and uses a different, slower check method than zlib.	directory information, and uses a different, slower check method than zlib.

The library does not install any signal handler. The decoder checks	The library does not install any signal handler. The decoder checks
the consistency of the compressed data, so the library should never	the consistency of the compressed data, so the library should never crash
crash even in case of corrupted input.	even in case of corrupted input.
*/	*/

typedef voidpf (*alloc_func) OF((voidpf opaque, uInt items, uInt size));	typedef voidpf (*alloc_func) OF((voidpf opaque, uInt items, uInt size));
Line 80 typedef void (*free_func) OF((voidpf opaque, voidpf	Line 83 typedef void (*free_func) OF((voidpf opaque, voidpf
struct internal_state;	struct internal_state;

typedef struct z_stream_s {	typedef struct z_stream_s {
Bytef next_in; / next input byte */	z_const Bytef next_in; / next input byte */
uInt avail_in; /* number of bytes available at next_in */	uInt avail_in; /* number of bytes available at next_in */
uLong total_in; /* total nb of input bytes read so far */	uLong total_in; /* total number of input bytes read so far */

Bytef next_out; / next output byte should be put there */	Bytef next_out; / next output byte should be put there */
uInt avail_out; /* remaining free space at next_out */	uInt avail_out; /* remaining free space at next_out */
uLong total_out; /* total nb of bytes output so far */	uLong total_out; /* total number of bytes output so far */

char msg; / last error message, NULL if no error */	z_const char msg; / last error message, NULL if no error */
struct internal_state FAR state; / not visible by applications */	struct internal_state FAR state; / not visible by applications */

alloc_func zalloc; /* used to allocate the internal state */	alloc_func zalloc; /* used to allocate the internal state */
Line 126 typedef struct gz_header_s {	Line 129 typedef struct gz_header_s {
typedef gz_header FAR *gz_headerp;	typedef gz_header FAR *gz_headerp;

/*	/*
The application must update next_in and avail_in when avail_in has	The application must update next_in and avail_in when avail_in has dropped
dropped to zero. It must update next_out and avail_out when avail_out	to zero. It must update next_out and avail_out when avail_out has dropped
has dropped to zero. The application must initialize zalloc, zfree and	to zero. The application must initialize zalloc, zfree and opaque before
opaque before calling the init function. All other fields are set by the	calling the init function. All other fields are set by the compression
compression library and must not be updated by the application.	library and must not be updated by the application.

The opaque value provided by the application will be passed as the first	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	parameter for calls of zalloc and zfree. This can be useful for custom
memory management. The compression library attaches no meaning to the	memory management. The compression library attaches no meaning to the
opaque value.	opaque value.

zalloc must return Z_NULL if there is not enough memory for the object.	zalloc must return Z_NULL if there is not enough memory for the object.
If zlib is used in a multi-threaded application, zalloc and zfree must be	If zlib is used in a multi-threaded application, zalloc and zfree must be
thread safe.	thread safe.

On 16-bit systems, the functions zalloc and zfree must be able to allocate	On 16-bit systems, the functions zalloc and zfree must be able to allocate
exactly 65536 bytes, but will not be required to allocate more than this	exactly 65536 bytes, but will not be required to allocate more than this if
if the symbol MAXSEG_64K is defined (see zconf.h). WARNING: On MSDOS,	the symbol MAXSEG_64K is defined (see zconf.h). WARNING: On MSDOS, pointers
pointers returned by zalloc for objects of exactly 65536 bytes must	returned by zalloc for objects of exactly 65536 bytes must have their
have their offset normalized to zero. The default allocation function	offset normalized to zero. The default allocation function provided by this
provided by this library ensures this (see zutil.c). To reduce memory	library ensures this (see zutil.c). To reduce memory requirements and avoid
requirements and avoid any allocation of 64K objects, at the expense of	any allocation of 64K objects, at the expense of compression ratio, compile
compression ratio, compile the library with -DMAX_WBITS=14 (see zconf.h).	the library with -DMAX_WBITS=14 (see zconf.h).

The fields total_in and total_out can be used for statistics or	The fields total_in and total_out can be used for statistics or progress
progress reports. After compression, total_in holds the total size of	reports. After compression, total_in holds the total size of the
the uncompressed data and may be saved for use in the decompressor	uncompressed data and may be saved for use in the decompressor (particularly
(particularly if the decompressor wants to decompress everything in	if the decompressor wants to decompress everything in a single step).
a single step).
*/	*/

/* constants */	/* constants */

#define Z_NO_FLUSH 0	#define Z_NO_FLUSH 0
#define Z_PARTIAL_FLUSH 1 /* will be removed, use Z_SYNC_FLUSH instead */	#define Z_PARTIAL_FLUSH 1
#define Z_SYNC_FLUSH 2	#define Z_SYNC_FLUSH 2
#define Z_FULL_FLUSH 3	#define Z_FULL_FLUSH 3
#define Z_FINISH 4	#define Z_FINISH 4
#define Z_BLOCK 5	#define Z_BLOCK 5
	#define Z_TREES 6
/* Allowed flush values; see deflate() and inflate() below for details */	/* Allowed flush values; see deflate() and inflate() below for details */
#define Z_INSERT_ONLY 6	#define Z_INSERT_ONLY 7

#define Z_OK 0	#define Z_OK 0
#define Z_STREAM_END 1	#define Z_STREAM_END 1
Line 177 typedef gz_header FAR *gz_headerp;	Line 180 typedef gz_header FAR *gz_headerp;
#define Z_MEM_ERROR (-4)	#define Z_MEM_ERROR (-4)
#define Z_BUF_ERROR (-5)	#define Z_BUF_ERROR (-5)
#define Z_VERSION_ERROR (-6)	#define Z_VERSION_ERROR (-6)
/* Return codes for the compression/decompression functions. Negative	/* Return codes for the compression/decompression functions. Negative values
* values are errors, positive values are used for special but normal events.	* are errors, positive values are used for special but normal events.
*/	*/

#define Z_NO_COMPRESSION 0	#define Z_NO_COMPRESSION 0
Line 208 typedef gz_header FAR *gz_headerp;	Line 211 typedef gz_header FAR *gz_headerp;
#define zlib_version zlibVersion()	#define zlib_version zlibVersion()
/* for compatibility with versions < 1.0.2 */	/* for compatibility with versions < 1.0.2 */


/* basic functions */	/* basic functions */

ZEXTERN const char * ZEXPORT zlibVersion OF((void));	ZEXTERN const char * ZEXPORT zlibVersion OF((void));
/* The application can compare zlibVersion and ZLIB_VERSION for consistency.	/* The application can compare zlibVersion and ZLIB_VERSION for consistency.
If the first character differs, the library code actually used is	If the first character differs, the library code actually used is not
not compatible with the zlib.h header file used by the application.	compatible with the zlib.h header file used by the application. This check
This check is automatically made by deflateInit and inflateInit.	is automatically made by deflateInit and inflateInit.
*/	*/

/*	/*
ZEXTERN int ZEXPORT deflateInit OF((z_streamp strm, int level));	ZEXTERN int ZEXPORT deflateInit OF((z_streamp strm, int level));

Initializes the internal stream state for compression. The fields	Initializes the internal stream state for compression. The fields
zalloc, zfree and opaque must be initialized before by the caller.	zalloc, zfree and opaque must be initialized before by the caller. If
If zalloc and zfree are set to Z_NULL, deflateInit updates them to	zalloc and zfree are set to Z_NULL, deflateInit updates them to use default
use default allocation functions.	allocation functions.

The compression level must be Z_DEFAULT_COMPRESSION, or between 0 and 9:	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	1 gives best speed, 9 gives best compression, 0 gives no compression at all
all (the input data is simply copied a block at a time).	(the input data is simply copied a block at a time). Z_DEFAULT_COMPRESSION
Z_DEFAULT_COMPRESSION requests a default compromise between speed and	requests a default compromise between speed and compression (currently
compression (currently equivalent to level 6).	equivalent to level 6).

deflateInit returns Z_OK if success, Z_MEM_ERROR if there was not	deflateInit returns Z_OK if success, Z_MEM_ERROR if there was not enough
enough memory, Z_STREAM_ERROR if level is not a valid compression level,	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	Z_VERSION_ERROR if the zlib library version (zlib_version) is incompatible
with the version assumed by the caller (ZLIB_VERSION).	with the version assumed by the caller (ZLIB_VERSION). msg is set to null
msg is set to null if there is no error message. deflateInit does not	if there is no error message. deflateInit does not perform any compression:
perform any compression: this will be done by deflate().	this will be done by deflate().
*/	*/


ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));	ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int flush));
/*	/*
deflate compresses as much data as possible, and stops when the input	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	buffer becomes empty or the output buffer becomes full. It may introduce
output latency (reading input without producing any output) except when	some output latency (reading input without producing any output) except when
forced to flush.	forced to flush.

The detailed semantics are as follows. deflate performs one or both of the	The detailed semantics are as follows. deflate performs one or both of the
following actions:	following actions:

- Compress more input starting at next_in and update next_in and avail_in	- 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	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	enough room in the output buffer), next_in and avail_in are updated and
processing will resume at this point for the next call of deflate().	processing will resume at this point for the next call of deflate().

- Provide more output starting at next_out and update next_out and avail_out	- 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.	accordingly. This action is forced if the parameter flush is non zero.
Forcing flush frequently degrades the compression ratio, so this parameter	Forcing flush frequently degrades the compression ratio, so this parameter
should be set only when necessary (in interactive applications).	should be set only when necessary (in interactive applications). Some
Some output may be provided even if flush is not set.	output may be provided even if flush is not set.

Before the call of deflate(), the application should ensure that at least	Before the call of deflate(), the application should ensure that at least
one of the actions is possible, by providing more input and/or consuming	one of the actions is possible, by providing more input and/or consuming more
more output, and updating avail_in or avail_out accordingly; avail_out	output, and updating avail_in or avail_out accordingly; avail_out should
should never be zero before the call. The application can consume the	never be zero before the call. The application can consume the compressed
compressed output when it wants, for example when the output buffer is full	output when it wants, for example when the output buffer is full (avail_out
(avail_out == 0), or after each call of deflate(). If deflate returns Z_OK	== 0), or after each call of deflate(). If deflate returns Z_OK and with
and with zero avail_out, it must be called again after making room in the	zero avail_out, it must be called again after making room in the output
output buffer because there might be more output pending.	buffer because there might be more output pending.

Normally the parameter flush is set to Z_NO_FLUSH, which allows deflate to	Normally the parameter flush is set to Z_NO_FLUSH, which allows deflate to
decide how much data to accumualte before producing output, in order to	decide how much data to accumulate before producing output, in order to
maximize compression.	maximize compression.

If the parameter flush is set to Z_SYNC_FLUSH, all pending output is	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	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	that the decompressor can get all input data available so far. (In
avail_in is zero after the call if enough output space has been provided	particular avail_in is zero after the call if enough output space has been
before the call.) Flushing may degrade compression for some compression	provided before the call.) Flushing may degrade compression for some
algorithms and so it should be used only when necessary.	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	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	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	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	random access is desired. Using Z_FULL_FLUSH too often can seriously degrade
compression.	compression.

If deflate returns with avail_out == 0, this function must be called again	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	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), 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). 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 is greater than six to avoid repeated flush markers due to
avail_out == 0 on return.	avail_out == 0 on return.

If the parameter flush is set to Z_FINISH, pending input is processed,	If the parameter flush is set to Z_FINISH, pending input is processed,
pending output is flushed and deflate returns with Z_STREAM_END if there	pending output is flushed and deflate returns with Z_STREAM_END if there was
was enough output space; if deflate returns with Z_OK, this function must be	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	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	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	deflate has returned Z_STREAM_END, the only possible operations on the stream
stream are deflateReset or deflateEnd.	are deflateReset or deflateEnd.

Z_FINISH can be used immediately after deflateInit if all the compression	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	is to be done in a single step. In this case, avail_out must be at least the
the value returned by deflateBound (see below). If deflate does not return	value returned by deflateBound (see below). Then deflate is guaranteed to
Z_STREAM_END, then it must be called again as described above.	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	deflate() sets strm->adler to the adler32 checksum of all input read
so far (that is, total_in bytes).	so far (that is, total_in bytes).

deflate() may update strm->data_type if it can make a good guess about	deflate() may update strm->data_type if it can make a good guess about
the input data type (Z_BINARY or Z_TEXT). In doubt, the data is considered	the input data type (Z_BINARY or Z_TEXT). In doubt, the data is considered
binary. This field is only for information purposes and does not affect	binary. This field is only for information purposes and does not affect the
the compression algorithm in any manner.	compression algorithm in any manner.

deflate() returns Z_OK if some progress has been made (more input	deflate() returns Z_OK if some progress has been made (more input
processed or more output produced), Z_STREAM_END if all input has been	processed or more output produced), Z_STREAM_END if all input has been
consumed and all output has been produced (only when flush is set to	consumed and all output has been produced (only when flush is set to
Z_FINISH), Z_STREAM_ERROR if the stream state was inconsistent (for example	Z_FINISH), Z_STREAM_ERROR if the stream state was inconsistent (for example
if next_in or next_out was NULL), Z_BUF_ERROR if no progress is possible	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	(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	fatal, and deflate() can be called again with more input and more output
space to continue compressing.	space to continue compressing.
*/	*/
Line 329 ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int fl	Line 354 ZEXTERN int ZEXPORT deflate OF((z_streamp strm, int fl
ZEXTERN int ZEXPORT deflateEnd OF((z_streamp strm));	ZEXTERN int ZEXPORT deflateEnd OF((z_streamp strm));
/*	/*
All dynamically allocated data structures for this stream are freed.	All dynamically allocated data structures for this stream are freed.
This function discards any unprocessed input and does not flush any	This function discards any unprocessed input and does not flush any pending
pending output.	output.

deflateEnd returns Z_OK if success, Z_STREAM_ERROR if the	deflateEnd returns Z_OK if success, Z_STREAM_ERROR if the
stream state was inconsistent, Z_DATA_ERROR if the stream was freed	stream state was inconsistent, Z_DATA_ERROR if the stream was freed
prematurely (some input or output was discarded). In the error case,	prematurely (some input or output was discarded). In the error case, msg
msg may be set but then points to a static string (which must not be	may be set but then points to a static string (which must not be
deallocated).	deallocated).
*/	*/

Line 343 ZEXTERN int ZEXPORT deflateEnd OF((z_streamp strm));	Line 368 ZEXTERN int ZEXPORT deflateEnd OF((z_streamp strm));
/*	/*
ZEXTERN int ZEXPORT inflateInit OF((z_streamp strm));	ZEXTERN int ZEXPORT inflateInit OF((z_streamp strm));

Initializes the internal stream state for decompression. The fields	Initializes the internal stream state for decompression. The fields
next_in, avail_in, zalloc, zfree and opaque must be initialized before by	next_in, avail_in, zalloc, zfree and opaque must be initialized before by
the caller. If next_in is not Z_NULL and avail_in is large enough (the exact	the caller. If next_in is not Z_NULL and avail_in is large enough (the
value depends on the compression method), inflateInit determines the	exact value depends on the compression method), inflateInit determines the
compression method from the zlib header and allocates all data structures	compression method from the zlib header and allocates all data structures
accordingly; otherwise the allocation will be deferred to the first call of	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	inflate. If zalloc and zfree are set to Z_NULL, inflateInit updates them to
Line 354 ZEXTERN int ZEXPORT inflateInit OF((z_streamp strm));	Line 379 ZEXTERN int ZEXPORT inflateInit OF((z_streamp strm));

inflateInit returns Z_OK if success, Z_MEM_ERROR if there was not enough	inflateInit returns Z_OK if success, Z_MEM_ERROR if there was not enough
memory, Z_VERSION_ERROR if the zlib library version is incompatible with the	memory, Z_VERSION_ERROR if the zlib library version is incompatible with the
version assumed by the caller. msg is set to null if there is no error	version assumed by the caller, or Z_STREAM_ERROR if the parameters are
message. inflateInit does not perform any decompression apart from reading	invalid, such as a null pointer to the structure. msg is set to null if
the zlib header if present: this will be done by inflate(). (So next_in and	there is no error message. inflateInit does not perform any decompression
avail_in may be modified, but next_out and avail_out are unchanged.)	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));	ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush));
/*	/*
inflate decompresses as much data as possible, and stops when the input	inflate decompresses as much data as possible, and stops when the input
buffer becomes empty or the output buffer becomes full. It may introduce	buffer becomes empty or the output buffer becomes full. It may introduce
some output latency (reading input without producing any output) except when	some output latency (reading input without producing any output) except when
forced to flush.	forced to flush.

The detailed semantics are as follows. inflate performs one or both of the	The detailed semantics are as follows. inflate performs one or both of the
following actions:	following actions:

- Decompress more input starting at next_in and update next_in and avail_in	- Decompress more input starting at next_in and update next_in and avail_in
accordingly. If not all input can be processed (because there is not	accordingly. If not all input can be processed (because there is not
enough room in the output buffer), next_in is updated and processing	enough room in the output buffer), next_in is updated and processing will
will resume at this point for the next call of inflate().	resume at this point for the next call of inflate().

- Provide more output starting at next_out and update next_out and avail_out	- Provide more output starting at next_out and update next_out and avail_out
accordingly. inflate() provides as much output as possible, until there	accordingly. inflate() provides as much output as possible, until there is
is no more input data or no more space in the output buffer (see below	no more input data or no more space in the output buffer (see below about
about the flush parameter).	the flush parameter).

Before the call of inflate(), the application should ensure that at least	Before the call of inflate(), the application should ensure that at least
one of the actions is possible, by providing more input and/or consuming	one of the actions is possible, by providing more input and/or consuming more
more output, and updating the next_* and avail_* values accordingly.	output, and updating the next_* and avail_* values accordingly. The
The application can consume the uncompressed output when it wants, for	application can consume the uncompressed output when it wants, for example
example when the output buffer is full (avail_out == 0), or after each	when the output buffer is full (avail_out == 0), or after each call of
call of inflate(). If inflate returns Z_OK and with zero avail_out, it	inflate(). If inflate returns Z_OK and with zero avail_out, it must be
must be called again after making room in the output buffer because there	called again after making room in the output buffer because there might be
might be more output pending.	more output pending.

The flush parameter of inflate() can be Z_NO_FLUSH, Z_SYNC_FLUSH,	The flush parameter of inflate() can be Z_NO_FLUSH, Z_SYNC_FLUSH, Z_FINISH,
Z_FINISH, or Z_BLOCK. Z_SYNC_FLUSH requests that inflate() flush as much	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	output as possible to the output buffer. Z_BLOCK requests that inflate()
if and when it gets to the next deflate block boundary. When decoding the	stop if and when it gets to the next deflate block boundary. When decoding
zlib or gzip format, this will cause inflate() to return immediately after	the zlib or gzip format, this will cause inflate() to return immediately
the header and before the first block. When doing a raw inflate, inflate()	after the header and before the first block. When doing a raw inflate,
will go ahead and process the first block, and will return when it gets to	inflate() will go ahead and process the first block, and will return when it
the end of that block, or when it runs out of data.	gets to the end of that block, or when it runs out of data.

The Z_BLOCK option assists in appending to or combining deflate streams.	The Z_BLOCK option assists in appending to or combining deflate streams.
Also to assist in this, on return inflate() will set strm->data_type to the	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	number of unused bits in the last byte taken from strm->next_in, plus 64 if
if inflate() is currently decoding the last block in the deflate stream,	inflate() is currently decoding the last block in the deflate stream, plus
plus 128 if inflate() returned immediately after decoding an end-of-block	128 if inflate() returned immediately after decoding an end-of-block code or
code or decoding the complete header up to just before the first byte of the	decoding the complete header up to just before the first byte of the deflate
deflate stream. The end-of-block will not be indicated until all of the	stream. The end-of-block will not be indicated until all of the uncompressed
uncompressed data from that block has been written to strm->next_out. The	data from that block has been written to strm->next_out. The number of
number of unused bits may in general be greater than seven, except when	unused bits may in general be greater than seven, except when bit 7 of
bit 7 of data_type is set, in which case the number of unused bits will be	data_type is set, in which case the number of unused bits will be less than
less than eight.	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	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	error. However if all decompression is to be performed in a single step (a
(a single call of inflate), the parameter flush should be set to	single call of inflate), the parameter flush should be set to Z_FINISH. In
Z_FINISH. In this case all pending input is processed and all pending	this case all pending input is processed and all pending output is flushed;
output is flushed; avail_out must be large enough to hold all the	avail_out must be large enough to hold all of the uncompressed data for the
uncompressed data. (The size of the uncompressed data may have been saved	operation to complete. (The size of the uncompressed data may have been
by the compressor for this purpose.) The next operation on this stream must	saved by the compressor for this purpose.) The use of Z_FINISH is not
be inflateEnd to deallocate the decompression state. The use of Z_FINISH	required to perform an inflation in one step. However it may be used to
is never required, but can be used to inform inflate that a faster approach	inform inflate that a faster approach can be used for the single inflate()
may be used for the single inflate() call.	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	In this implementation, inflate() always flushes as much output as
possible to the output buffer, and always uses the faster approach on the	possible to the output buffer, and always uses the faster approach on the
first call. So the only effect of the flush parameter in this implementation	first call. So the effects of the flush parameter in this implementation are
is on the return value of inflate(), as noted below, or when it returns early	on the return value of inflate() as noted below, when inflate() returns early
because Z_BLOCK is used.	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	If a preset dictionary is needed after this call (see inflateSetDictionary
below), inflate sets strm->adler to the adler32 checksum of the dictionary	below), inflate sets strm->adler to the Adler-32 checksum of the dictionary
chosen by the compressor and returns Z_NEED_DICT; otherwise it sets	chosen by the compressor and returns Z_NEED_DICT; otherwise it sets
strm->adler to the adler32 checksum of all output produced so far (that is,	strm->adler to the Adler-32 checksum of all output produced so far (that is,
total_out bytes) and returns Z_OK, Z_STREAM_END or an error code as described	total_out bytes) and returns Z_OK, Z_STREAM_END or an error code as described
below. At the end of the stream, inflate() checks that its computed adler32	below. At the end of the stream, inflate() checks that its computed adler32
checksum is equal to that saved by the compressor and returns Z_STREAM_END	checksum is equal to that saved by the compressor and returns Z_STREAM_END
only if the checksum is correct.	only if the checksum is correct.

inflate() will decompress and check either zlib-wrapped or gzip-wrapped	inflate() can decompress and check either zlib-wrapped or gzip-wrapped
deflate data. The header type is detected automatically. Any information	deflate data. The header type is detected automatically, if requested when
contained in the gzip header is not retained, so applications that need that	initializing with inflateInit2(). Any information contained in the gzip
information should instead use raw inflate, see inflateInit2() below, or	header is not retained, so applications that need that information should
inflateBack() and perform their own processing of the gzip header and	instead use raw inflate, see inflateInit2() below, or inflateBack() and
trailer.	perform their own processing of the gzip header and trailer. When processing
	gzip-wrapped deflate data, strm->adler32 is set to the CRC-32 of the output
	producted so far. The CRC-32 is checked against the gzip trailer.

inflate() returns Z_OK if some progress has been made (more input processed	inflate() returns Z_OK if some progress has been made (more input processed
or more output produced), Z_STREAM_END if the end of the compressed data has	or more output produced), Z_STREAM_END if the end of the compressed data has
Line 450 ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int fl	Line 496 ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int fl
preset dictionary is needed at this point, Z_DATA_ERROR if the input data was	preset dictionary is needed at this point, Z_DATA_ERROR if the input data was
corrupted (input stream not conforming to the zlib format or incorrect check	corrupted (input stream not conforming to the zlib format or incorrect check
value), Z_STREAM_ERROR if the stream structure was inconsistent (for example	value), 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,	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	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	output buffer when Z_FINISH is used. Note that Z_BUF_ERROR is not fatal, and
inflate() can be called again with more input and more output space to	inflate() can be called again with more input and more output space to
continue decompressing. If Z_DATA_ERROR is returned, the application may then	continue decompressing. If Z_DATA_ERROR is returned, the application may
call inflateSync() to look for a good compression block if a partial recovery	then call inflateSync() to look for a good compression block if a partial
of the data is desired.	recovery of the data is desired.
*/	*/


ZEXTERN int ZEXPORT inflateEnd OF((z_streamp strm));	ZEXTERN int ZEXPORT inflateEnd OF((z_streamp strm));
/*	/*
All dynamically allocated data structures for this stream are freed.	All dynamically allocated data structures for this stream are freed.
This function discards any unprocessed input and does not flush any	This function discards any unprocessed input and does not flush any pending
pending output.	output.

inflateEnd returns Z_OK if success, Z_STREAM_ERROR if the stream state	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	was inconsistent. In the error case, msg may be set but then points to a
static string (which must not be deallocated).	static string (which must not be deallocated).
*/	*/


/* Advanced functions */	/* Advanced functions */

/*	/*
Line 485 ZEXTERN int ZEXPORT deflateInit2 OF((z_streamp strm,	Line 532 ZEXTERN int ZEXPORT deflateInit2 OF((z_streamp strm,
int memLevel,	int memLevel,
int strategy));	int strategy));

This is another version of deflateInit with more compression options. The	This is another version of deflateInit with more compression options. The
fields next_in, zalloc, zfree and opaque must be initialized before by	fields next_in, zalloc, zfree and opaque must be initialized before by the
the caller.	caller.

The method parameter is the compression method. It must be Z_DEFLATED in	The method parameter is the compression method. It must be Z_DEFLATED in
this version of the library.	this version of the library.

The windowBits parameter is the base two logarithm of the window size	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	(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	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	compression at the expense of memory usage. The default value is 15 if
deflateInit is used instead.	deflateInit is used instead.

windowBits can also be -8..-15 for raw deflate. In this case, -windowBits	windowBits can also be -8..-15 for raw deflate. In this case, -windowBits
determines the window size. deflate() will then generate raw deflate data	determines the window size. deflate() will then generate raw deflate data
with no zlib header or trailer, and will not compute an adler32 check value.	with no zlib header or trailer, and will not compute an adler32 check value.

windowBits can also be greater than 15 for optional gzip encoding. Add	windowBits can also be greater than 15 for optional gzip encoding. Add
16 to windowBits to write a simple gzip header and trailer around the	16 to windowBits to write a simple gzip header and trailer around the
compressed data instead of a zlib wrapper. The gzip header will have no	compressed data instead of a zlib wrapper. The gzip header will have no
file name, no extra data, no comment, no modification time (set to zero),	file name, no extra data, no comment, no modification time (set to zero), no
no header crc, and the operating system will be set to 255 (unknown). If a	header crc, and the operating system will be set to 255 (unknown). If a
gzip stream is being written, strm->adler is a crc32 instead of an adler32.	gzip stream is being written, strm->adler is a crc32 instead of an adler32.

The memLevel parameter specifies how much memory should be allocated	The memLevel parameter specifies how much memory should be allocated
for the internal compression state. memLevel=1 uses minimum memory but	for the internal compression state. memLevel=1 uses minimum memory but is
is slow and reduces compression ratio; memLevel=9 uses maximum memory	slow and reduces compression ratio; memLevel=9 uses maximum memory for
for optimal speed. The default value is 8. See zconf.h for total memory	optimal speed. The default value is 8. See zconf.h for total memory usage
usage as a function of windowBits and memLevel.	as a function of windowBits and memLevel.

The strategy parameter is used to tune the compression algorithm. Use the	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	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	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	string match), or Z_RLE to limit match distances to one (run-length
encoding). Filtered data consists mostly of small values with a somewhat	encoding). Filtered data consists mostly of small values with a somewhat
random distribution. In this case, the compression algorithm is tuned to	random distribution. In this case, the compression algorithm is tuned to
compress them better. The effect of Z_FILTERED is to force more Huffman	compress them better. The effect of Z_FILTERED is to force more Huffman
coding and less string matching; it is somewhat intermediate between	coding and less string matching; it is somewhat intermediate between
Z_DEFAULT and Z_HUFFMAN_ONLY. Z_RLE is designed to be almost as fast as	Z_DEFAULT_STRATEGY and Z_HUFFMAN_ONLY. Z_RLE is designed to be almost as
Z_HUFFMAN_ONLY, but give better compression for PNG image data. The strategy	fast as Z_HUFFMAN_ONLY, but give better compression for PNG image data. The
parameter only affects the compression ratio but not the correctness of the	strategy parameter only affects the compression ratio but not the
compressed output even if it is not set appropriately. Z_FIXED prevents the	correctness of the compressed output even if it is not set appropriately.
use of dynamic Huffman codes, allowing for a simpler decoder for special	Z_FIXED prevents the use of dynamic Huffman codes, allowing for a simpler
applications.	decoder for special applications.

deflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough	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	memory, Z_STREAM_ERROR if any parameter is invalid (such as an invalid
method). msg is set to null if there is no error message. deflateInit2 does	method), or Z_VERSION_ERROR if the zlib library version (zlib_version) is
not perform any compression: this will be done by deflate().	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,	ZEXTERN int ZEXPORT deflateSetDictionary OF((z_streamp strm,
Line 541 ZEXTERN int ZEXPORT deflateSetDictionary OF((z_streamp	Line 590 ZEXTERN int ZEXPORT deflateSetDictionary OF((z_streamp
uInt dictLength));	uInt dictLength));
/*	/*
Initializes the compression dictionary from the given byte sequence	Initializes the compression dictionary from the given byte sequence
without producing any compressed output. This function must be called	without producing any compressed output. When using the zlib format, this
immediately after deflateInit, deflateInit2 or deflateReset, before any	function must be called immediately after deflateInit, deflateInit2 or
call of deflate. The compressor and decompressor must use exactly the same	deflateReset, and before any call of deflate. When doing raw deflate, this
dictionary (see inflateSetDictionary).	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	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	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	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	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	predicted with good accuracy; the data can then be compressed better than
with the default empty dictionary.	with the default empty dictionary.

Depending on the size of the compression data structures selected by	Depending on the size of the compression data structures selected by
deflateInit or deflateInit2, a part of the dictionary may in effect be	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	discarded, for example if the dictionary is larger than the window size
deflate or deflate2. Thus the strings most likely to be useful should be	provided in deflateInit or deflateInit2. Thus the strings most likely to be
put at the end of the dictionary, not at the front. In addition, the	useful should be put at the end of the dictionary, not at the front. In
current implementation of deflate will use at most the window size minus	addition, the current implementation of deflate will use at most the window
262 bytes of the provided dictionary.	size minus 262 bytes of the provided dictionary.

Upon return of this function, strm->adler is set to the adler32 value	Upon return of this function, strm->adler is set to the adler32 value
of the dictionary; the decompressor may later use this value to determine	of the dictionary; the decompressor may later use this value to determine
which dictionary has been used by the compressor. (The adler32 value	which dictionary has been used by the compressor. (The adler32 value
applies to the whole dictionary even if only a subset of the dictionary is	applies to the whole dictionary even if only a subset of the dictionary is
actually used by the compressor.) If a raw deflate was requested, then the	actually used by the compressor.) If a raw deflate was requested, then the
adler32 value is not computed and strm->adler is not set.	adler32 value is not computed and strm->adler is not set.

deflateSetDictionary returns Z_OK if success, or Z_STREAM_ERROR if a	deflateSetDictionary returns Z_OK if success, or Z_STREAM_ERROR if a
parameter is invalid (such as NULL dictionary) or the stream state is	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	inconsistent (for example if deflate has already been called for this stream
or if the compression method is bsort). deflateSetDictionary does not	or if not at a block boundary for raw deflate). deflateSetDictionary does
perform any compression: this will be done by deflate().	not perform any compression: this will be done by deflate().
*/	*/

ZEXTERN int ZEXPORT deflateCopy OF((z_streamp dest,	ZEXTERN int ZEXPORT deflateCopy OF((z_streamp dest,
Line 582 ZEXTERN int ZEXPORT deflateCopy OF((z_streamp dest,	Line 636 ZEXTERN int ZEXPORT deflateCopy OF((z_streamp dest,

This function can be useful when several compression strategies will be	This function can be useful when several compression strategies will be
tried, for example when there are several ways of pre-processing the input	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	data with a filter. The streams that will be discarded should then be freed
by calling deflateEnd. Note that deflateCopy duplicates the internal	by calling deflateEnd. Note that deflateCopy duplicates the internal
compression state which can be quite large, so this strategy is slow and	compression state which can be quite large, so this strategy is slow and can
can consume lots of memory.	consume lots of memory.

deflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not	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	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	(such as zalloc being Z_NULL). msg is left unchanged in both source and
destination.	destination.
*/	*/

ZEXTERN int ZEXPORT deflateReset OF((z_streamp strm));	ZEXTERN int ZEXPORT deflateReset OF((z_streamp strm));
/*	/*
This function is equivalent to deflateEnd followed by deflateInit,	This function is equivalent to deflateEnd followed by deflateInit,
but does not free and reallocate all the internal compression state.	but does not free and reallocate all the internal compression state. The
The stream will keep the same compression level and any other attributes	stream will keep the same compression level and any other attributes that
that may have been set by deflateInit2.	may have been set by deflateInit2.

deflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source	deflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source
stream state was inconsistent (such as zalloc or state being NULL).	stream state was inconsistent (such as zalloc or state being Z_NULL).
*/	*/

ZEXTERN int ZEXPORT deflateParams OF((z_streamp strm,	ZEXTERN int ZEXPORT deflateParams OF((z_streamp strm,
Line 611 ZEXTERN int ZEXPORT deflateParams OF((z_streamp strm,	Line 665 ZEXTERN int ZEXPORT deflateParams OF((z_streamp strm,
Dynamically update the compression level and compression strategy. The	Dynamically update the compression level and compression strategy. The
interpretation of level and strategy is as in deflateInit2. This can be	interpretation of level and strategy is as in deflateInit2. This can be
used to switch between compression and straight copy of the input data, or	used to switch between compression and straight copy of the input data, or
to switch to a different kind of input data requiring a different	to switch to a different kind of input data requiring a different strategy.
strategy. If the compression level is changed, the input available so far	If the compression level is changed, the input available so far is
is compressed with the old level (and may be flushed); the new level will	compressed with the old level (and may be flushed); the new level will take
take effect only at the next call of deflate().	effect only at the next call of deflate().

Before the call of deflateParams, the stream state must be set as for	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	a call of deflate(), since the currently available input may have to be
be compressed and flushed. In particular, strm->avail_out must be non-zero.	compressed and flushed. In particular, strm->avail_out must be non-zero.

deflateParams returns Z_OK if success, Z_STREAM_ERROR if the source	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	stream state was inconsistent or if a parameter was invalid, Z_BUF_ERROR if
if strm->avail_out was zero.	strm->avail_out was zero.
*/	*/

ZEXTERN int ZEXPORT deflateTune OF((z_streamp strm,	ZEXTERN int ZEXPORT deflateTune OF((z_streamp strm,
Line 646 ZEXTERN uLong ZEXPORT deflateBound OF((z_streamp strm,	Line 700 ZEXTERN uLong ZEXPORT deflateBound OF((z_streamp strm,
uLong sourceLen));	uLong sourceLen));
/*	/*
deflateBound() returns an upper bound on the compressed size after	deflateBound() returns an upper bound on the compressed size after
deflation of sourceLen bytes. It must be called after deflateInit()	deflation of sourceLen bytes. It must be called after deflateInit() or
or deflateInit2(). This would be used to allocate an output buffer	deflateInit2(), and after deflateSetHeader(), if used. This would be used
for deflation in a single pass, and so would be called before deflate().	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,	ZEXTERN int ZEXPORT deflatePrime OF((z_streamp strm,
int bits,	int bits,
int value));	int value));
/*	/*
deflatePrime() inserts bits in the deflate output stream. The intent	deflatePrime() inserts bits in the deflate output stream. The intent
is that this function is used to start off the deflate output with the	is that this function is used to start off the deflate output with the bits
bits leftover from a previous deflate stream when appending to it. As such,	leftover from a previous deflate stream when appending to it. As such, this
this function can only be used for raw deflate, and must be used before the	function can only be used for raw deflate, and must be used before the first
first deflate() call after a deflateInit2() or deflateReset(). bits must be	deflate() call after a deflateInit2() or deflateReset(). bits must be less
less than or equal to 16, and that many of the least significant bits of	than or equal to 16, and that many of the least significant bits of value
value will be inserted in the output.	will be inserted in the output.

deflatePrime returns Z_OK if success, or Z_STREAM_ERROR if the source	deflatePrime returns Z_OK if success, Z_BUF_ERROR if there was not enough
stream state was inconsistent.	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,	ZEXTERN int ZEXPORT deflateSetHeader OF((z_streamp strm,
gz_headerp head));	gz_headerp head));
/*	/*
deflateSetHeader() provides gzip header information for when a gzip	deflateSetHeader() provides gzip header information for when a gzip
stream is requested by deflateInit2(). deflateSetHeader() may be called	stream is requested by deflateInit2(). deflateSetHeader() may be called
after deflateInit2() or deflateReset() and before the first call of	after deflateInit2() or deflateReset() and before the first call of
deflate(). The text, time, os, extra field, name, and comment information	deflate(). The text, time, os, extra field, name, and comment information
Line 683 ZEXTERN int ZEXPORT deflateSetHeader OF((z_streamp str	Line 759 ZEXTERN int ZEXPORT deflateSetHeader OF((z_streamp str
1.3.x) do not support header crc's, and will report that it is a "multi-part	1.3.x) do not support header crc's, and will report that it is a "multi-part
gzip file" and give up.	gzip file" and give up.

If deflateSetHeader is not used, the default gzip header has text false,	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	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().	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	deflateSetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source
stream state was inconsistent.	stream state was inconsistent.
*/	*/

Line 695 ZEXTERN int ZEXPORT deflateSetHeader OF((z_streamp str	Line 771 ZEXTERN int ZEXPORT deflateSetHeader OF((z_streamp str
ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm,	ZEXTERN int ZEXPORT inflateInit2 OF((z_streamp strm,
int windowBits));	int windowBits));

This is another version of inflateInit with an extra parameter. The	This is another version of inflateInit with an extra parameter. The
fields next_in, avail_in, zalloc, zfree and opaque must be initialized	fields next_in, avail_in, zalloc, zfree and opaque must be initialized
before by the caller.	before by the caller.

The windowBits parameter is the base two logarithm of the maximum window	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	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	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	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	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	deflateInit2() was not used. If a compressed stream with a larger window
size is given as input, inflate() will return with the error code	size is given as input, inflate() will return with the error code
Z_DATA_ERROR instead of trying to allocate a larger window.	Z_DATA_ERROR instead of trying to allocate a larger window.

windowBits can also be -8..-15 for raw inflate. In this case, -windowBits	windowBits can also be zero to request that inflate use the window size in
determines the window size. inflate() will then process raw deflate data,	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	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	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	is for use with other formats that use the deflate compressed data format
such as zip. Those formats provide their own check values. If a custom	such as zip. Those formats provide their own check values. If a custom
format is developed using the raw deflate format for compressed data, it is	format is developed using the raw deflate format for compressed data, it is
recommended that a check value such as an adler32 or a crc32 be applied to	recommended that a check value such as an adler32 or a crc32 be applied to
the uncompressed data as is done in the zlib, gzip, and zip formats. For	the uncompressed data as is done in the zlib, gzip, and zip formats. For
most applications, the zlib format should be used as is. Note that comments	most applications, the zlib format should be used as is. Note that comments
above on the use in deflateInit2() applies to the magnitude of windowBits.	above on the use in deflateInit2() applies to the magnitude of windowBits.

windowBits can also be greater than 15 for optional gzip decoding. Add	windowBits can also be greater than 15 for optional gzip decoding. Add
32 to windowBits to enable zlib and gzip decoding with automatic header	32 to windowBits to enable zlib and gzip decoding with automatic header
detection, or add 16 to decode only the gzip format (the zlib format will	detection, or add 16 to decode only the gzip format (the zlib format will
return a Z_DATA_ERROR). If a gzip stream is being decoded, strm->adler is	return a Z_DATA_ERROR). If a gzip stream is being decoded, strm->adler is a
a crc32 instead of an adler32.	crc32 instead of an adler32.

inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough	inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
memory, Z_STREAM_ERROR if a parameter is invalid (such as a null strm). msg	memory, Z_VERSION_ERROR if the zlib library version is incompatible with the
is set to null if there is no error message. inflateInit2 does not perform	version assumed by the caller, or Z_STREAM_ERROR if the parameters are
any decompression apart from reading the zlib header if present: this will	invalid, such as a null pointer to the structure. msg is set to null if
be done by inflate(). (So next_in and avail_in may be modified, but next_out	there is no error message. inflateInit2 does not perform any decompression
and avail_out are unchanged.)	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,	ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp strm,
Line 739 ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp	Line 822 ZEXTERN int ZEXPORT inflateSetDictionary OF((z_streamp
uInt dictLength));	uInt dictLength));
/*	/*
Initializes the decompression dictionary from the given uncompressed byte	Initializes the decompression dictionary from the given uncompressed byte
sequence. This function must be called immediately after a call of inflate,	sequence. This function must be called immediately after a call of inflate,
if that call returned Z_NEED_DICT. The dictionary chosen by the compressor	if that call returned Z_NEED_DICT. The dictionary chosen by the compressor
can be determined from the adler32 value returned by that call of inflate.	can be determined from the adler32 value returned by that call of inflate.
The compressor and decompressor must use exactly the same dictionary (see	The compressor and decompressor must use exactly the same dictionary (see
deflateSetDictionary). For raw inflate, this function can be called	deflateSetDictionary). For raw inflate, this function can be called at any
immediately after inflateInit2() or inflateReset() and before any call of	time to set the dictionary. If the provided dictionary is smaller than the
inflate() to set the dictionary. The application must insure that the	window and there is already data in the window, then the provided dictionary
dictionary that was used for compression is provided.	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	inflateSetDictionary returns Z_OK if success, Z_STREAM_ERROR if a
parameter is invalid (such as NULL dictionary) or the stream state is	parameter is invalid (e.g. dictionary being Z_NULL) or the stream state is
inconsistent, Z_DATA_ERROR if the given dictionary doesn't match the	inconsistent, Z_DATA_ERROR if the given dictionary doesn't match the
expected one (incorrect adler32 value). inflateSetDictionary does not	expected one (incorrect adler32 value). inflateSetDictionary does not
perform any decompression: this will be done by subsequent calls of	perform any decompression: this will be done by subsequent calls of
inflate().	inflate().
*/	*/

	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));	ZEXTERN int ZEXPORT inflateSync OF((z_streamp strm));
/*	/*
Skips invalid compressed data until a full flush point (see above the	Skips invalid compressed data until a possible full flush point (see above
description of deflate with Z_FULL_FLUSH) can be found, or until all	for the description of deflate with Z_FULL_FLUSH) can be found, or until all
available input is skipped. No output is provided.	available input is skipped. No output is provided.

inflateSync returns Z_OK if a full flush point has been found, Z_BUF_ERROR	inflateSync searches for a 00 00 FF FF pattern in the compressed data.
if no more input was provided, Z_DATA_ERROR if no flush point has been found,	All full flush points have this pattern, but not all occurrences of this
or Z_STREAM_ERROR if the stream structure was inconsistent. In the success	pattern are full flush points.
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	inflateSync returns Z_OK if a possible full flush point has been found,
application may repeatedly call inflateSync, providing more input each time,	Z_BUF_ERROR if no more input was provided, Z_DATA_ERROR if no flush point
until success or end of the input data.	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,	ZEXTERN int ZEXPORT inflateCopy OF((z_streamp dest,
Line 783 ZEXTERN int ZEXPORT inflateCopy OF((z_streamp dest,	Line 886 ZEXTERN int ZEXPORT inflateCopy OF((z_streamp dest,

inflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not	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	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	(such as zalloc being Z_NULL). msg is left unchanged in both source and
destination.	destination.
*/	*/

ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm));	ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm));
/*	/*
This function is equivalent to inflateEnd followed by inflateInit,	This function is equivalent to inflateEnd followed by inflateInit,
but does not free and reallocate all the internal decompression state.	but does not free and reallocate all the internal decompression state. The
The stream will keep attributes that may have been set by inflateInit2.	stream will keep attributes that may have been set by inflateInit2.

inflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source	inflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source
stream state was inconsistent (such as zalloc or state being NULL).	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,	ZEXTERN int ZEXPORT inflatePrime OF((z_streamp strm,
int bits,	int bits,
int value));	int value));
/*	/*
This function inserts bits in the inflate input stream. The intent is	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	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	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	from next_in. This function should only be used with raw inflate, and
should be used before the first inflate() call after inflateInit2() or	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	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.	least significant bits of value will be inserted in the input.

inflatePrime returns Z_OK if success, or Z_STREAM_ERROR if the source	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.	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,	ZEXTERN int ZEXPORT inflateGetHeader OF((z_streamp strm,
gz_headerp head));	gz_headerp head));
/*	/*
inflateGetHeader() requests that gzip header information be stored in the	inflateGetHeader() requests that gzip header information be stored in the
provided gz_header structure. inflateGetHeader() may be called after	provided gz_header structure. inflateGetHeader() may be called after
inflateInit2() or inflateReset(), and before the first call of inflate().	inflateInit2() or inflateReset(), and before the first call of inflate().
As inflate() processes the gzip stream, head->done is zero until the header	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	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	being decoded, then head->done is set to -1 to indicate that there will be
no gzip header information forthcoming. Note that Z_BLOCK can be used to	no gzip header information forthcoming. Note that Z_BLOCK or Z_TREES can be
force inflate() to return immediately after header processing is complete	used to force inflate() to return immediately after header processing is
and before any actual data is decompressed.	complete and before any actual data is decompressed.

The text, time, xflags, and os fields are filled in with the gzip header	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	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	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,	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_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.	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,	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	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,	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	terminated with a zero unless the length is greater than comm_max. When any
any of extra, name, or comment are not Z_NULL and the respective field is	of extra, name, or comment are not Z_NULL and the respective field is not
not present in the header, then that field is set to Z_NULL to signal its	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	absence. This allows the use of deflateSetHeader() with the returned
structure to duplicate the header. However if those fields are set to	structure to duplicate the header. However if those fields are set to
allocated memory, then the application will need to save those pointers	allocated memory, then the application will need to save those pointers
elsewhere so that they can be eventually freed.	elsewhere so that they can be eventually freed.

If inflateGetHeader is not used, then the header information is simply	If inflateGetHeader is not used, then the header information is simply
discarded. The header is always checked for validity, including the header	discarded. The header is always checked for validity, including the header
CRC if present. inflateReset() will reset the process to discard the header	CRC if present. inflateReset() will reset the process to discard the header
information. The application would need to call inflateGetHeader() again to	information. The application would need to call inflateGetHeader() again to
retrieve the header from the next gzip stream.	retrieve the header from the next gzip stream.

inflateGetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source	inflateGetHeader returns Z_OK if success, or Z_STREAM_ERROR if the source
stream state was inconsistent.	stream state was inconsistent.
*/	*/

Line 870 ZEXTERN int ZEXPORT inflateBackInit OF((z_streamp strm	Line 1018 ZEXTERN int ZEXPORT inflateBackInit OF((z_streamp strm
See inflateBack() for the usage of these routines.	See inflateBack() for the usage of these routines.

inflateBackInit will return Z_OK on success, Z_STREAM_ERROR if any of	inflateBackInit will return Z_OK on success, Z_STREAM_ERROR if any of
the paramaters are invalid, Z_MEM_ERROR if the internal state could not	the parameters are invalid, Z_MEM_ERROR if the internal state could not be
be allocated, or Z_VERSION_ERROR if the version of the library does not	allocated, or Z_VERSION_ERROR if the version of the library does not match
match the version of the header file.	the version of the header file.
*/	*/

typedef unsigned (in_func) OF((void FAR , unsigned char FAR * FAR *));	typedef unsigned (in_func) OF((void FAR ,
	z_const unsigned char FAR * FAR *));
typedef int (out_func) OF((void FAR , unsigned char FAR *, unsigned));	typedef int (out_func) OF((void FAR , unsigned char FAR *, unsigned));

ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm,	ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm,
Line 883 ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm,	Line 1032 ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm,
out_func out, void FAR *out_desc));	out_func out, void FAR *out_desc));
/*	/*
inflateBack() does a raw inflate with a single call using a call-back	inflateBack() does a raw inflate with a single call using a call-back
interface for input and output. This is more efficient than inflate() for	interface for input and output. This is potentially more efficient than
file i/o applications in that it avoids copying between the output and the	inflate() for file i/o applications, in that it avoids copying between the
sliding window by simply making the window itself the output buffer. This	output and the sliding window by simply making the window itself the output
function trusts the application to not change the output buffer passed by	buffer. inflate() can be faster on modern CPUs when used with large
the output function, at least until inflateBack() returns.	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	inflateBackInit() must be called first to allocate the internal state
and to initialize the state with the user-provided window buffer.	and to initialize the state with the user-provided window buffer.
inflateBack() may then be used multiple times to inflate a complete, raw	inflateBack() may then be used multiple times to inflate a complete, raw
deflate stream with each call. inflateBackEnd() is then called to free	deflate stream with each call. inflateBackEnd() is then called to free the
the allocated state.	allocated state.

A raw deflate stream is one with no zlib or gzip header or trailer.	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	This routine would normally be used in a utility that reads zip or gzip
files and writes out uncompressed files. The utility would decode the	files and writes out uncompressed files. The utility would decode the
header and process the trailer on its own, hence this routine expects	header and process the trailer on its own, hence this routine expects only
only the raw deflate stream to decompress. This is different from the	the raw deflate stream to decompress. This is different from the normal
normal behavior of inflate(), which expects either a zlib or gzip header and	behavior of inflate(), which expects either a zlib or gzip header and
trailer around the deflate stream.	trailer around the deflate stream.

inflateBack() uses two subroutines supplied by the caller that are then	inflateBack() uses two subroutines supplied by the caller that are then
Line 926 ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm,	Line 1076 ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm,
calling inflateBack(). If strm->next_in is Z_NULL, then in() will be called	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	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	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].	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	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	first parameter of in() and out() respectively when they are called. These
Line 936 ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm,	Line 1086 ZEXTERN int ZEXPORT inflateBack OF((z_streamp strm,
On return, inflateBack() will set strm->next_in and strm->avail_in to	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	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	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	if in() or out() returned an error, Z_DATA_ERROR if there was a format error
error in the deflate stream (in which case strm->msg is set to indicate the	in the deflate stream (in which case strm->msg is set to indicate the nature
nature of the error), or Z_STREAM_ERROR if the stream was not properly	of the error), or Z_STREAM_ERROR if the stream was not properly initialized.
initialized. In the case of Z_BUF_ERROR, an input or output error can be	In the case of Z_BUF_ERROR, an input or output error can be distinguished
distinguished using strm->next_in which will be Z_NULL only if in() returned	using strm->next_in which will be Z_NULL only if in() returned an error. If
an error. If strm->next is not Z_NULL, then the Z_BUF_ERROR was due to	strm->next_in is not Z_NULL, then the Z_BUF_ERROR was due to out() returning
out() returning non-zero. (in() will always be called before out(), so	non-zero. (in() will always be called before out(), so strm->next_in is
strm->next_in is assured to be defined if out() returns non-zero.) Note	assured to be defined if out() returns non-zero.) Note that inflateBack()
that inflateBack() cannot return Z_OK.	cannot return Z_OK.
*/	*/

ZEXTERN int ZEXPORT inflateBackEnd OF((z_streamp strm));	ZEXTERN int ZEXPORT inflateBackEnd OF((z_streamp strm));
Line 996 ZEXTERN uLong ZEXPORT zlibCompileFlags OF((void));	Line 1146 ZEXTERN uLong ZEXPORT zlibCompileFlags OF((void));
27-31: 0 (reserved)	27-31: 0 (reserved)
*/	*/

	#ifndef Z_SOLO

/* utility functions */	/* utility functions */

/*	/*
The following utility functions are implemented on top of the	The following utility functions are implemented on top of the basic
basic stream-oriented functions. To simplify the interface, some	stream-oriented functions. To simplify the interface, some default options
default options are assumed (compression level and memory usage,	are assumed (compression level and memory usage, standard memory allocation
standard memory allocation functions). The source code of these	functions). The source code of these utility functions can be modified if
utility functions can easily be modified if you need special options.	you need special options.
*/	*/

ZEXTERN int ZEXPORT compress OF((Bytef dest, uLongf destLen,	ZEXTERN int ZEXPORT compress OF((Bytef dest, uLongf destLen,
const Bytef *source, uLong sourceLen));	const Bytef *source, uLong sourceLen));
/*	/*
Compresses the source buffer into the destination buffer. sourceLen is	Compresses the source buffer into the destination buffer. sourceLen is
the byte length of the source buffer. Upon entry, destLen is the total	the byte length of the source buffer. Upon entry, destLen is the total size
size of the destination buffer, which must be at least the value returned	of the destination buffer, which must be at least the value returned by
by compressBound(sourceLen). Upon exit, destLen is the actual size of the	compressBound(sourceLen). Upon exit, destLen is the actual size of the
compressed buffer.	compressed 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	compress returns Z_OK if success, Z_MEM_ERROR if there was not
enough memory, Z_BUF_ERROR if there was not enough room in the output	enough memory, Z_BUF_ERROR if there was not enough room in the output
buffer.	buffer.
Line 1026 ZEXTERN int ZEXPORT compress2 OF((Bytef *dest, uLong	Line 1176 ZEXTERN int ZEXPORT compress2 OF((Bytef *dest, uLong
const Bytef *source, uLong sourceLen,	const Bytef *source, uLong sourceLen,
int level));	int level));
/*	/*
Compresses the source buffer into the destination buffer. The level	Compresses the source buffer into the destination buffer. The level
parameter has the same meaning as in deflateInit. sourceLen is the byte	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	length of the source buffer. Upon entry, destLen is the total size of the
destination buffer, which must be at least the value returned by	destination buffer, which must be at least the value returned by
compressBound(sourceLen). Upon exit, destLen is the actual size of the	compressBound(sourceLen). Upon exit, destLen is the actual size of the
compressed buffer.	compressed buffer.

compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough	compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
Line 1041 ZEXTERN int ZEXPORT compress2 OF((Bytef *dest, uLong	Line 1191 ZEXTERN int ZEXPORT compress2 OF((Bytef *dest, uLong
ZEXTERN uLong ZEXPORT compressBound OF((uLong sourceLen));	ZEXTERN uLong ZEXPORT compressBound OF((uLong sourceLen));
/*	/*
compressBound() returns an upper bound on the compressed size after	compressBound() returns an upper bound on the compressed size after
compress() or compress2() on sourceLen bytes. It would be used before	compress() or compress2() on sourceLen bytes. It would be used before a
a compress() or compress2() call to allocate the destination buffer.	compress() or compress2() call to allocate the destination buffer.
*/	*/

ZEXTERN int ZEXPORT uncompress OF((Bytef dest, uLongf destLen,	ZEXTERN int ZEXPORT uncompress OF((Bytef dest, uLongf destLen,
const Bytef *source, uLong sourceLen));	const Bytef *source, uLong sourceLen));
/*	/*
Decompresses the source buffer into the destination buffer. sourceLen is	Decompresses the source buffer into the destination buffer. sourceLen is
the byte length of the source buffer. Upon entry, destLen is the total	the byte length of the source buffer. Upon entry, destLen is the total size
size of the destination buffer, which must be large enough to hold the	of the destination buffer, which must be large enough to hold the entire
entire uncompressed data. (The size of the uncompressed data must have	uncompressed data. (The size of the uncompressed data must have been saved
been saved previously by the compressor and transmitted to the decompressor	previously by the compressor and transmitted to the decompressor by some
by some mechanism outside the scope of this compression library.)	mechanism outside the scope of this compression library.) Upon exit, destLen
Upon exit, destLen is the actual size of the compressed buffer.	is the actual size of the uncompressed 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	uncompress returns Z_OK if success, Z_MEM_ERROR if there was not
enough memory, Z_BUF_ERROR if there was not enough room in the output	enough memory, Z_BUF_ERROR if there was not enough room in the output
buffer, or Z_DATA_ERROR if the input data was corrupted or incomplete.	buffer, or Z_DATA_ERROR if the input data was corrupted or incomplete. In
	the case where there is not enough room, uncompress() will fill the output
	buffer with the uncompressed data up to that point.
*/	*/

	/* gzip file access functions */

typedef voidp gzFile;	/*
	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.
	*/

ZEXTERN gzFile ZEXPORT gzopen OF((const char path, const char mode));	typedef struct gzFile_s gzFile; / semi-opaque gzip file descriptor */

/*	/*
Opens a gzip (.gz) file for reading or writing. The mode parameter	ZEXTERN gzFile ZEXPORT gzopen OF((const char path, const char mode));
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", or 'R' for run-length encoding
as in "wb1R". (See the description of deflateInit2 for more information
about the strategy parameter.)

	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	gzopen can be used to read a file which is not in gzip format; in this
case gzread will directly read from the file without decompression.	case gzread will directly read from the file without decompression. When
	reading, this will be detected automatically by looking for the magic two-
	byte gzip header.

gzopen returns NULL if the file could not be opened or if there was	gzopen returns NULL if the file could not be opened, if there was
insufficient memory to allocate the (de)compression state; errno	insufficient memory to allocate the gzFile state, or if an invalid mode was
can be checked to distinguish the two cases (if errno is zero, the	specified (an 'r', 'w', or 'a' was not provided, or '+' was provided).
zlib error is Z_MEM_ERROR). */	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));	ZEXTERN gzFile ZEXPORT gzdopen OF((int fd, const char *mode));
/*	/*
gzdopen() associates a gzFile with the file descriptor fd. File	gzdopen associates a gzFile with the file descriptor fd. File descriptors
descriptors are obtained from calls like open, dup, creat, pipe or	are obtained from calls like open, dup, creat, pipe or fileno (if the file
fileno (in the file has been previously opened with fopen).	has been previously opened with fopen). The mode parameter is as in gzopen.
The mode parameter is as in gzopen.
The next call of gzclose on the returned gzFile will also close the	The next call of gzclose on the returned gzFile will also close the file
file descriptor fd, just like fclose(fdopen(fd), mode) closes the file	descriptor fd, just like fclose(fdopen(fd, mode)) closes the file descriptor
descriptor fd. If you want to keep fd open, use gzdopen(dup(fd), mode).	fd. If you want to keep fd open, use fd = dup(fd_keep); gz = gzdopen(fd,
gzdopen returns NULL if there was insufficient memory to allocate	mode);. The duplicated descriptor should be saved to avoid a leak, since
the (de)compression state.	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));	ZEXTERN int ZEXPORT gzsetparams OF((gzFile file, int level, int strategy));
/*	/*
Dynamically update the compression level or strategy. See the description	Dynamically update the compression level or strategy. See the description
of deflateInit2 for the meaning of these parameters.	of deflateInit2 for the meaning of these parameters.

gzsetparams returns Z_OK if success, or Z_STREAM_ERROR if the file was not	gzsetparams returns Z_OK if success, or Z_STREAM_ERROR if the file was not
opened for writing.	opened for writing.
*/	*/

ZEXTERN int ZEXPORT gzread OF((gzFile file, voidp buf, unsigned len));	ZEXTERN int ZEXPORT gzread OF((gzFile file, voidp buf, unsigned len));
/*	/*
Reads the given number of uncompressed bytes from the compressed file.	Reads the given number of uncompressed bytes from the compressed file. If
If the input file was not in gzip format, gzread copies the given number	the input file is not in gzip format, gzread copies the given number of
of bytes into the buffer.	bytes into the buffer directly from the file.
gzread returns the number of uncompressed bytes actually read (0 for
end of file, -1 for error). */

ZEXTERN int ZEXPORT gzwrite OF((gzFile file,	After reaching the end of a gzip stream in the input, gzread will continue
voidpc buf, unsigned len));	to read, looking for another gzip stream. Any number of gzip streams may be
	concatenated in the input file, and will all be decompressed by gzread().
	If something other than a gzip stream is encountered after a gzip stream,
	that remaining trailing garbage is ignored (and no error is returned).

	gzread can be used to read a gzip file that is being concurrently written.
	Upon reaching the end of the input, gzread will return with the available
	data. If the error code returned by gzerror is Z_OK or Z_BUF_ERROR, then
	gzclearerr can be used to clear the end of file indicator in order to permit
	gzread to be tried again. Z_OK indicates that a gzip stream was completed
	on the last gzread. Z_BUF_ERROR indicates that the input file ended in the
	middle of a gzip stream. Note that gzread does not return -1 in the event
	of an incomplete gzip stream. This error is deferred until gzclose(), which
	will return Z_BUF_ERROR if the last gzread ended in the middle of a gzip
	stream. Alternatively, gzerror can be used before gzclose to detect this
	case.

	gzread returns the number of uncompressed bytes actually read, less than
	len for end of file, or -1 for error.
	*/

	ZEXTERN int ZEXPORT gzwrite OF((gzFile file,
	voidpc buf, unsigned len));
/*	/*
Writes the given number of uncompressed bytes into the compressed file.	Writes the given number of uncompressed bytes into the compressed file.
gzwrite returns the number of uncompressed bytes actually written	gzwrite returns the number of uncompressed bytes written or 0 in case of
(0 in case of error).	error.
*/	*/

ZEXTERN int ZEXPORTVA gzprintf OF((gzFile file, const char *format, ...));	ZEXTERN int ZEXPORTVA gzprintf Z_ARG((gzFile file, const char *format, ...));
/*	/*
Converts, formats, and writes the args to the compressed file under	Converts, formats, and writes the arguments to the compressed file under
control of the format string, as in fprintf. gzprintf returns the number of	control of the format string, as in fprintf. gzprintf returns the number of
uncompressed bytes actually written (0 in case of error). The number of	uncompressed bytes actually written, or 0 in case of error. The number of
uncompressed bytes written is limited to 4095. The caller should assure that	uncompressed bytes written is limited to 8191, or one less than the buffer
this limit is not exceeded. If it is exceeded, then gzprintf() will return	size given to gzbuffer(). The caller should assure that this limit is not
return an error (0) with nothing written. In this case, there may also be a	exceeded. If it is exceeded, then gzprintf() will return an error (0) with
buffer overflow with unpredictable consequences, which is possible only if	nothing written. In this case, there may also be a buffer overflow with
zlib was compiled with the insecure functions sprintf() or vsprintf()	unpredictable consequences, which is possible only if zlib was compiled with
because the secure snprintf() or vsnprintf() functions were not available.	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));	ZEXTERN int ZEXPORT gzputs OF((gzFile file, const char *s));
/*	/*
Writes the given null-terminated string to the compressed file, excluding	Writes the given null-terminated string to the compressed file, excluding
the terminating null character.	the terminating null character.
gzputs returns the number of characters written, or -1 in case of error.
	gzputs returns the number of characters written, or -1 in case of error.
*/	*/

ZEXTERN char * ZEXPORT gzgets OF((gzFile file, char *buf, int len));	ZEXTERN char * ZEXPORT gzgets OF((gzFile file, char *buf, int len));
/*	/*
Reads bytes from the compressed file until len-1 characters are read, or	Reads bytes from the compressed file until len-1 characters are read, or a
a newline character is read and transferred to buf, or an end-of-file	newline character is read and transferred to buf, or an end-of-file
condition is encountered. The string is then terminated with a null	condition is encountered. If any characters are read or if len == 1, the
character.	string is terminated with a null character. If no characters are read due
gzgets returns buf, or Z_NULL in case of error.	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));	ZEXTERN int ZEXPORT gzputc OF((gzFile file, int c));
/*	/*
Writes c, converted to an unsigned char, into the compressed file.	Writes c, converted to an unsigned char, into the compressed file. gzputc
gzputc returns the value that was written, or -1 in case of error.	returns the value that was written, or -1 in case of error.
*/	*/

ZEXTERN int ZEXPORT gzgetc OF((gzFile file));	ZEXTERN int ZEXPORT gzgetc OF((gzFile file));
/*	/*
Reads one byte from the compressed file. gzgetc returns this byte	Reads one byte from the compressed file. gzgetc returns this byte or -1
or -1 in case of end of file or error.	in case of end of file or error. This is implemented as a macro for speed.
	As such, it does not do all of the checking the other functions do. I.e.
	it does not check to see if file is NULL, nor whether the structure file
	points to has been clobbered or not.
*/	*/

ZEXTERN int ZEXPORT gzungetc OF((int c, gzFile file));	ZEXTERN int ZEXPORT gzungetc OF((int c, gzFile file));
/*	/*
Push one character back onto the stream to be read again later.	Push one character back onto the stream to be read as the first character
Only one character of push-back is allowed. gzungetc() returns the	on the next read. At least one character of push-back is allowed.
character pushed, or -1 on failure. gzungetc() will fail if a	gzungetc() returns the character pushed, or -1 on failure. gzungetc() will
character has been pushed but not read yet, or if c is -1. The pushed	fail if c is -1, and may fail if a character has been pushed but not read
character will be discarded if the stream is repositioned with gzseek()	yet. If gzungetc is used immediately after gzopen or gzdopen, at least the
or gzrewind().	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));	ZEXTERN int ZEXPORT gzflush OF((gzFile file, int flush));
/*	/*
Flushes all pending output into the compressed file. The parameter	Flushes all pending output into the compressed file. The parameter flush
flush is as in the deflate() function. The return value is the zlib	is as in the deflate() function. The return value is the zlib error number
error number (see function gzerror below). gzflush returns Z_OK if	(see function gzerror below). gzflush is only permitted when writing.
the flush parameter is Z_FINISH and all output could be flushed.
gzflush should be called only when strictly necessary because it can	If the flush parameter is Z_FINISH, the remaining data is written and the
degrade compression.	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	ZEXTERN z_off_t ZEXPORT gzseek OF((gzFile file,
given compressed file. The offset represents a number of bytes in the	z_off_t offset, int whence));
uncompressed data stream. The whence parameter is defined as in lseek(2);
	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.	the value SEEK_END is not supported.

If the file is opened for reading, this function is emulated but can be	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	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	supported; gzseek then compresses a sequence of zeroes up to the new
starting position.	starting position.

gzseek returns the resulting offset location as measured in bytes from	gzseek returns the resulting offset location as measured in bytes from
the beginning of the uncompressed stream, or -1 in case of error, in	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	particular if the file is opened for writing and the new starting position
would be before the current position.	would be before the current position.
Line 1203 ZEXTERN int ZEXPORT gzrewind OF((gzFile file));	Line 1449 ZEXTERN int ZEXPORT gzrewind OF((gzFile file));
/*	/*
Rewinds the given file. This function is supported only for reading.	Rewinds the given file. This function is supported only for reading.

gzrewind(file) is equivalent to (int)gzseek(file, 0L, SEEK_SET)	gzrewind(file) is equivalent to (int)gzseek(file, 0L, SEEK_SET)
*/	*/

	/*
ZEXTERN z_off_t ZEXPORT gztell OF((gzFile file));	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)
	*/

/*	/*
Returns the starting position for the next gzread or gzwrite on the	ZEXTERN z_off_t ZEXPORT gzoffset OF((gzFile file));
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)	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));	ZEXTERN int ZEXPORT gzeof OF((gzFile file));
/*	/*
Returns 1 when EOF has previously been detected reading the given	Returns true (1) if the end-of-file indicator has been set while reading,
input stream, otherwise zero.	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));	ZEXTERN int ZEXPORT gzdirect OF((gzFile file));
/*	/*
Returns 1 if file is being read directly without decompression, otherwise	Returns true (1) if file is being copied directly while reading, or false
zero.	(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));	ZEXTERN int ZEXPORT gzclose OF((gzFile file));
/*	/*
Flushes all pending output if necessary, closes the compressed file	Flushes all pending output if necessary, closes the compressed file and
and deallocates all the (de)compression state. The return value is the zlib	deallocates the (de)compression state. Note that once file is closed, you
error number (see function gzerror below).	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));	ZEXTERN const char * ZEXPORT gzerror OF((gzFile file, int *errnum));
/*	/*
Returns the error message for the last error which occurred on the	Returns the error message for the last error which occurred on the given
given compressed file. errnum is set to zlib error number. If an	compressed file. errnum is set to zlib error number. If an error occurred
error occurred in the file system and not in the compression library,	in the file system and not in the compression library, errnum is set to
errnum is set to Z_ERRNO and the application may consult errno	Z_ERRNO and the application may consult errno to get the exact error code.
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));	ZEXTERN void ZEXPORT gzclearerr OF((gzFile file));
/*	/*
Clears the error and end-of-file flags for file. This is analogous to the	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	clearerr() function in stdio. This is useful for continuing to read a gzip
file that is being written concurrently.	file that is being written concurrently.
*/	*/

	#endif /* !Z_SOLO */

/* checksum functions */	/* checksum functions */

/*	/*
These functions are not related to compression but are exported	These functions are not related to compression but are exported
anyway because they might be useful in applications using the	anyway because they might be useful in applications using the compression
compression library.	library.
*/	*/

ZEXTERN uLong ZEXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len));	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	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	return the updated checksum. If buf is Z_NULL, this function returns the
the required initial value for the checksum.	required initial value for the checksum.
An Adler-32 checksum is almost as reliable as a CRC32 but can be computed
much faster. Usage example:

	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);	uLong adler = adler32(0L, Z_NULL, 0);

while (read_buffer(buffer, length) != EOF) {	while (read_buffer(buffer, length) != EOF) {
Line 1274 ZEXTERN uLong ZEXPORT adler32 OF((uLong adler, const B	Line 1586 ZEXTERN uLong ZEXPORT adler32 OF((uLong adler, const B
if (adler != original_adler) error();	if (adler != original_adler) error();
*/	*/

	/*
ZEXTERN uLong ZEXPORT adler32_combine OF((uLong adler1, uLong adler2,	ZEXTERN uLong ZEXPORT adler32_combine OF((uLong adler1, uLong adler2,
z_off_t len2));	z_off_t len2));
/*
Combine two Adler-32 checksums into one. For two sequences of bytes, seq1	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	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	each, adler1 and adler2. adler32_combine() returns the Adler-32 checksum of
seq1 and seq2 concatenated, requiring only adler1, adler2, and len2.	seq1 and seq2 concatenated, requiring only adler1, adler2, and len2. Note
	that the z_off_t type (like off_t) is a signed integer. If len2 is
	negative, the result has no meaning or utility.
*/	*/

ZEXTERN uLong ZEXPORT crc32 OF((uLong crc, const Bytef *buf, uInt len));	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	Update a running CRC-32 with the bytes buf[0..len-1] and return the
updated CRC-32. If buf is NULL, this function returns the required initial	updated CRC-32. If buf is Z_NULL, this function returns the required
value for the for the crc. Pre- and post-conditioning (one's complement) is	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.	performed within this function so it shouldn't be done by the application.

Usage example:	Usage example:

uLong crc = crc32(0L, Z_NULL, 0);	uLong crc = crc32(0L, Z_NULL, 0);
Line 1299 ZEXTERN uLong ZEXPORT crc32 OF((uLong crc, const Byt	Line 1615 ZEXTERN uLong ZEXPORT crc32 OF((uLong crc, const Byt
if (crc != original_crc) error();	if (crc != original_crc) error();
*/	*/

	/*
ZEXTERN uLong ZEXPORT crc32_combine OF((uLong crc1, uLong crc2, z_off_t len2));	ZEXTERN uLong ZEXPORT crc32_combine OF((uLong crc1, uLong crc2, z_off_t len2));

/*
Combine two CRC-32 check values into one. For two sequences of bytes,	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	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	calculated for each, crc1 and crc2. crc32_combine() returns the CRC-32
Line 1330 ZEXTERN int ZEXPORT inflateBackInit_ OF((z_streamp str	Line 1646 ZEXTERN int ZEXPORT inflateBackInit_ OF((z_streamp str
const char *version,	const char *version,
int stream_size));	int stream_size));
#define deflateInit(strm, level) \	#define deflateInit(strm, level) \
deflateInit_((strm), (level), ZLIB_VERSION, sizeof(z_stream))	deflateInit_((strm), (level), ZLIB_VERSION, (int)sizeof(z_stream))
#define inflateInit(strm) \	#define inflateInit(strm) \
inflateInit_((strm), ZLIB_VERSION, sizeof(z_stream))	inflateInit_((strm), ZLIB_VERSION, (int)sizeof(z_stream))
#define deflateInit2(strm, level, method, windowBits, memLevel, strategy) \	#define deflateInit2(strm, level, method, windowBits, memLevel, strategy) \
deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\	deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\
(strategy), ZLIB_VERSION, sizeof(z_stream))	(strategy), ZLIB_VERSION, (int)sizeof(z_stream))
#define inflateInit2(strm, windowBits) \	#define inflateInit2(strm, windowBits) \
inflateInit2_((strm), (windowBits), ZLIB_VERSION, sizeof(z_stream))	inflateInit2_((strm), (windowBits), ZLIB_VERSION, \
	(int)sizeof(z_stream))
#define inflateBackInit(strm, windowBits, window) \	#define inflateBackInit(strm, windowBits, window) \
inflateBackInit_((strm), (windowBits), (window), \	inflateBackInit_((strm), (windowBits), (window), \
ZLIB_VERSION, sizeof(z_stream))	ZLIB_VERSION, (int)sizeof(z_stream))

	#ifndef Z_SOLO

	/* gzgetc() macro and its supporting function and exposed data structure. Note
	* that the real internal state is much larger than the exposed structure.
	* This abbreviated structure exposes just enough for the gzgetc() macro. The
	* user should not mess with these exposed elements, since their names or
	* behavior could change in the future, perhaps even capriciously. They can
	* only be used by the gzgetc() macro. You have been warned.
	*/
	struct gzFile_s {
	unsigned have;
	unsigned char *next;
	z_off64_t pos;
	};
	ZEXTERN int ZEXPORT gzgetc_ OF((gzFile file)); /* 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)	#if !defined(ZUTIL_H) && !defined(NO_DUMMY_DECL)
struct internal_state {int dummy;}; /* hack for buggy compilers */	struct internal_state {int dummy;};
#endif	#endif

	/* undocumented functions */
ZEXTERN const char * ZEXPORT zError OF((int));	ZEXTERN const char * ZEXPORT zError OF((int));
ZEXTERN int ZEXPORT inflateSyncPoint OF((z_streamp z));	ZEXTERN int ZEXPORT inflateSyncPoint OF((z_streamp));
ZEXTERN const uLongf * ZEXPORT get_crc_table OF((void));	ZEXTERN const z_crc_t FAR * ZEXPORT get_crc_table OF((void));
	ZEXTERN int ZEXPORT inflateUndermine OF((z_streamp, int));
	ZEXTERN int ZEXPORT 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	#ifdef __cplusplus
}	}

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