Annotation of elwix/tools/uboot_mkimage/include/u-boot/zlib.h, revision 1.1.1.1
1.1 misho 1: /*
2: * This file is derived from zlib.h and zconf.h from the zlib-1.2.3
3: * distribution by Jean-loup Gailly and Mark Adler, with some additions
4: * by Paul Mackerras to aid in implementing Deflate compression and
5: * decompression for PPP packets.
6: */
7:
8: /*
9: * ==FILEVERSION 960122==
10: *
11: * This marker is used by the Linux installation script to determine
12: * whether an up-to-date version of this file is already installed.
13: */
14:
15: /* zlib.h -- interface of the 'zlib' general purpose compression library
16: version 1.2.3, July 18th, 2005
17:
18: Copyright (C) 1995-2005 Jean-loup Gailly and Mark Adler
19:
20: This software is provided 'as-is', without any express or implied
21: warranty. In no event will the authors be held liable for any damages
22: arising from the use of this software.
23:
24: Permission is granted to anyone to use this software for any purpose,
25: including commercial applications, and to alter it and redistribute it
26: freely, subject to the following restrictions:
27:
28: 1. The origin of this software must not be misrepresented; you must not
29: claim that you wrote the original software. If you use this software
30: in a product, an acknowledgment in the product documentation would be
31: appreciated but is not required.
32: 2. Altered source versions must be plainly marked as such, and must not be
33: misrepresented as being the original software.
34: 3. This notice may not be removed or altered from any source distribution.
35:
36: Jean-loup Gailly Mark Adler
37: jloup@gzip.org madler@alumni.caltech.edu
38:
39:
40: The data format used by the zlib library is described by RFCs (Request for
41: Comments) 1950 to 1952 in the files http://www.ietf.org/rfc/rfc1950.txt
42: (zlib format), rfc1951.txt (deflate format) and rfc1952.txt (gzip format).
43: */
44:
45: #ifndef ZLIB_H
46: #define ZLIB_H
47:
48: #ifdef __cplusplus
49: extern "C" {
50: #endif
51:
52: #define ZLIB_VERSION "1.2.3"
53: #define ZLIB_VERNUM 0x1230
54:
55: /* #include "zconf.h" */ /* included directly here */
56: /* zconf.h -- configuration of the zlib compression library
57: * Copyright (C) 1995-2005 Jean-loup Gailly.
58: * For conditions of distribution and use, see copyright notice in zlib.h
59: */
60:
61: /* Begin of new zconf.h */
62: /*
63: * If you *really* need a unique prefix for all types and library functions,
64: * compile with -DZ_PREFIX. The "standard" zlib should be compiled without it.
65: */
66: #ifdef Z_PREFIX
67: # define deflateInit_ z_deflateInit_
68: # define deflate z_deflate
69: # define deflateEnd z_deflateEnd
70: # define inflateInit_ z_inflateInit_
71: # define inflate z_inflate
72: # define inflateEnd z_inflateEnd
73: # define deflateInit2_ z_deflateInit2_
74: # define deflateSetDictionary z_deflateSetDictionary
75: # define deflateCopy z_deflateCopy
76: # define deflateReset z_deflateReset
77: # define deflateParams z_deflateParams
78: # define deflateBound z_deflateBound
79: # define deflatePrime z_deflatePrime
80: # define inflateInit2_ z_inflateInit2_
81: # define inflateSetDictionary z_inflateSetDictionary
82: # define inflateSync z_inflateSync
83: # define inflateSyncPoint z_inflateSyncPoint
84: # define inflateCopy z_inflateCopy
85: # define inflateReset z_inflateReset
86: # define inflateBack z_inflateBack
87: # define inflateBackEnd z_inflateBackEnd
88: # define compress z_compress
89: # define compress2 z_compress2
90: # define compressBound z_compressBound
91: # define uncompress z_uncompress
92: # define adler32 z_adler32
93: # define crc32 z_crc32
94: # define get_crc_table z_get_crc_table
95: # define zError z_zError
96:
97: # define alloc_func z_alloc_func
98: # define free_func z_free_func
99: # define in_func z_in_func
100: # define out_func z_out_func
101: # define Byte z_Byte
102: # define uInt z_uInt
103: # define uLong z_uLong
104: # define Bytef z_Bytef
105: # define charf z_charf
106: # define intf z_intf
107: # define uIntf z_uIntf
108: # define uLongf z_uLongf
109: # define voidpf z_voidpf
110: # define voidp z_voidp
111: #endif
112:
113: #if defined(__MSDOS__) && !defined(MSDOS)
114: # define MSDOS
115: #endif
116: #if (defined(OS_2) || defined(__OS2__)) && !defined(OS2)
117: # define OS2
118: #endif
119: #if defined(_WINDOWS) && !defined(WINDOWS)
120: # define WINDOWS
121: #endif
122: #if defined(_WIN32) || defined(_WIN32_WCE) || defined(__WIN32__)
123: # ifndef WIN32
124: # define WIN32
125: # endif
126: #endif
127: #if (defined(MSDOS) || defined(OS2) || defined(WINDOWS)) && !defined(WIN32)
128: # if !defined(__GNUC__) && !defined(__FLAT__) && !defined(__386__)
129: # ifndef SYS16BIT
130: # define SYS16BIT
131: # endif
132: # endif
133: #endif
134:
135: /*
136: * Compile with -DMAXSEG_64K if the alloc function cannot allocate more
137: * than 64k bytes at a time (needed on systems with 16-bit int).
138: */
139: #ifdef SYS16BIT
140: # define MAXSEG_64K
141: #endif
142: #ifdef MSDOS
143: # define UNALIGNED_OK
144: #endif
145:
146: #ifdef __STDC_VERSION__
147: # ifndef STDC
148: # define STDC
149: # endif
150: # if __STDC_VERSION__ >= 199901L
151: # ifndef STDC99
152: # define STDC99
153: # endif
154: # endif
155: #endif
156: #if !defined(STDC) && (defined(__STDC__) || defined(__cplusplus))
157: # define STDC
158: #endif
159: #if !defined(STDC) && (defined(__GNUC__) || defined(__BORLANDC__))
160: # define STDC
161: #endif
162: #if !defined(STDC) && (defined(MSDOS) || defined(WINDOWS) || defined(WIN32))
163: # define STDC
164: #endif
165: #if !defined(STDC) && (defined(OS2) || defined(__HOS_AIX__))
166: # define STDC
167: #endif
168:
169: #if defined(__OS400__) && !defined(STDC) /* iSeries (formerly AS/400). */
170: # define STDC
171: #endif
172:
173: #ifndef STDC
174: # ifndef const /* cannot use !defined(STDC) && !defined(const) on Mac */
175: # define const /* note: need a more gentle solution here */
176: # endif
177: #endif
178:
179: /* Some Mac compilers merge all .h files incorrectly: */
180: #if defined(__MWERKS__)||defined(applec)||defined(THINK_C)||defined(__SC__)
181: # define NO_DUMMY_DECL
182: #endif
183:
184: /* Maximum value for memLevel in deflateInit2 */
185: #ifndef MAX_MEM_LEVEL
186: # ifdef MAXSEG_64K
187: # define MAX_MEM_LEVEL 8
188: # else
189: # define MAX_MEM_LEVEL 9
190: # endif
191: #endif
192:
193: /* Maximum value for windowBits in deflateInit2 and inflateInit2.
194: * WARNING: reducing MAX_WBITS makes minigzip unable to extract .gz files
195: * created by gzip. (Files created by minigzip can still be extracted by
196: * gzip.)
197: */
198: #ifndef MAX_WBITS
199: # define MAX_WBITS 15 /* 32K LZ77 window */
200: #endif
201:
202: /* The memory requirements for deflate are (in bytes):
203: (1 << (windowBits+2)) + (1 << (memLevel+9))
204: that is: 128K for windowBits=15 + 128K for memLevel = 8 (default values)
205: plus a few kilobytes for small objects. For example, if you want to reduce
206: the default memory requirements from 256K to 128K, compile with
207: make CFLAGS="-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7"
208: Of course this will generally degrade compression (there's no free lunch).
209:
210: The memory requirements for inflate are (in bytes) 1 << windowBits
211: that is, 32K for windowBits=15 (default value) plus a few kilobytes
212: for small objects.
213: */
214:
215: /* Type declarations */
216:
217: #ifndef OF /* function prototypes */
218: # ifdef STDC
219: # define OF(args) args
220: # else
221: # define OF(args) ()
222: # endif
223: #endif
224:
225: /* The following definitions for FAR are needed only for MSDOS mixed
226: * model programming (small or medium model with some far allocations).
227: * This was tested only with MSC; for other MSDOS compilers you may have
228: * to define NO_MEMCPY in zutil.h. If you don't need the mixed model,
229: * just define FAR to be empty.
230: */
231: #ifdef SYS16BIT
232: # if defined(M_I86SM) || defined(M_I86MM)
233: /* MSC small or medium model */
234: # define SMALL_MEDIUM
235: # ifdef _MSC_VER
236: # define FAR _far
237: # else
238: # define FAR far
239: # endif
240: # endif
241: # if (defined(__SMALL__) || defined(__MEDIUM__))
242: /* Turbo C small or medium model */
243: # define SMALL_MEDIUM
244: # ifdef __BORLANDC__
245: # define FAR _far
246: # else
247: # define FAR far
248: # endif
249: # endif
250: #endif
251:
252: #if defined(WINDOWS) || defined(WIN32)
253: /* If building or using zlib as a DLL, define ZLIB_DLL.
254: * This is not mandatory, but it offers a little performance increase.
255: */
256: # ifdef ZLIB_DLL
257: # if defined(WIN32) && (!defined(__BORLANDC__) || (__BORLANDC__ >= 0x500))
258: # ifdef ZLIB_INTERNAL
259: # define ZEXTERN extern __declspec(dllexport)
260: # else
261: # define ZEXTERN extern __declspec(dllimport)
262: # endif
263: # endif
264: # endif /* ZLIB_DLL */
265: /* If building or using zlib with the WINAPI/WINAPIV calling convention,
266: * define ZLIB_WINAPI.
267: * Caution: the standard ZLIB1.DLL is NOT compiled using ZLIB_WINAPI.
268: */
269: # ifdef ZLIB_WINAPI
270: # ifdef FAR
271: # undef FAR
272: # endif
273: # include <windows.h>
274: /* No need for _export, use ZLIB.DEF instead. */
275: /* For complete Windows compatibility, use WINAPI, not __stdcall. */
276: # define ZEXPORT WINAPI
277: # ifdef WIN32
278: # define ZEXPORTVA WINAPIV
279: # else
280: # define ZEXPORTVA FAR CDECL
281: # endif
282: # endif
283: #endif
284:
285: #if defined (__BEOS__)
286: # ifdef ZLIB_DLL
287: # ifdef ZLIB_INTERNAL
288: # define ZEXPORT __declspec(dllexport)
289: # define ZEXPORTVA __declspec(dllexport)
290: # else
291: # define ZEXPORT __declspec(dllimport)
292: # define ZEXPORTVA __declspec(dllimport)
293: # endif
294: # endif
295: #endif
296:
297: #ifndef ZEXTERN
298: # define ZEXTERN extern
299: #endif
300: #ifndef ZEXPORT
301: # define ZEXPORT
302: #endif
303: #ifndef ZEXPORTVA
304: # define ZEXPORTVA
305: #endif
306:
307: #ifndef FAR
308: # define FAR
309: #endif
310:
311: #if !defined(__MACTYPES__)
312: typedef unsigned char Byte; /* 8 bits */
313: #endif
314: typedef unsigned int uInt; /* 16 bits or more */
315: typedef unsigned long uLong; /* 32 bits or more */
316:
317: #ifdef SMALL_MEDIUM
318: /* Borland C/C++ and some old MSC versions ignore FAR inside typedef */
319: # define Bytef Byte FAR
320: #else
321: typedef Byte FAR Bytef;
322: #endif
323: typedef char FAR charf;
324: typedef int FAR intf;
325: typedef uInt FAR uIntf;
326: typedef uLong FAR uLongf;
327:
328: #ifdef STDC
329: typedef void const *voidpc;
330: typedef void FAR *voidpf;
331: typedef void *voidp;
332: #else
333: typedef Byte const *voidpc;
334: typedef Byte FAR *voidpf;
335: typedef Byte *voidp;
336: #endif
337:
338: # ifdef VMS
339: # include <unixio.h> /* for off_t */
340: # endif
341: # define z_off_t off_t
342: #ifndef SEEK_SET
343: # define SEEK_SET 0 /* Seek from beginning of file. */
344: # define SEEK_CUR 1 /* Seek from current position. */
345: # define SEEK_END 2 /* Set file pointer to EOF plus "offset" */
346: #endif
347: #ifndef z_off_t
348: # define z_off_t long
349: #endif
350:
351: #if defined(__OS400__)
352: # define NO_vsnprintf
353: #endif
354:
355: #if defined(__MVS__)
356: # define NO_vsnprintf
357: # ifdef FAR
358: # undef FAR
359: # endif
360: #endif
361:
362: /* MVS linker does not support external names larger than 8 bytes */
363: #if defined(__MVS__)
364: # pragma map(deflateInit_,"DEIN")
365: # pragma map(deflateInit2_,"DEIN2")
366: # pragma map(deflateEnd,"DEEND")
367: # pragma map(deflateBound,"DEBND")
368: # pragma map(inflateInit_,"ININ")
369: # pragma map(inflateInit2_,"ININ2")
370: # pragma map(inflateEnd,"INEND")
371: # pragma map(inflateSync,"INSY")
372: # pragma map(inflateSetDictionary,"INSEDI")
373: # pragma map(compressBound,"CMBND")
374: # pragma map(inflate_table,"INTABL")
375: # pragma map(inflate_fast,"INFA")
376: # pragma map(inflate_copyright,"INCOPY")
377: #endif
378: /* End of new zconf.h */
379:
380: /*
381: The 'zlib' compression library provides in-memory compression and
382: decompression functions, including integrity checks of the uncompressed
383: data. This version of the library supports only one compression method
384: (deflation) but other algorithms will be added later and will have the same
385: stream interface.
386:
387: Compression can be done in a single step if the buffers are large
388: enough (for example if an input file is mmap'ed), or can be done by
389: repeated calls of the compression function. In the latter case, the
390: application must provide more input and/or consume the output
391: (providing more output space) before each call.
392:
393: The compressed data format used by default by the in-memory functions is
394: the zlib format, which is a zlib wrapper documented in RFC 1950, wrapped
395: around a deflate stream, which is itself documented in RFC 1951.
396:
397: The library also supports reading and writing files in gzip (.gz) format
398: with an interface similar to that of stdio using the functions that start
399: with "gz". The gzip format is different from the zlib format. gzip is a
400: gzip wrapper, documented in RFC 1952, wrapped around a deflate stream.
401:
402: This library can optionally read and write gzip streams in memory as well.
403:
404: The zlib format was designed to be compact and fast for use in memory
405: and on communications channels. The gzip format was designed for single-
406: file compression on file systems, has a larger header than zlib to maintain
407: directory information, and uses a different, slower check method than zlib.
408:
409: The library does not install any signal handler. The decoder checks
410: the consistency of the compressed data, so the library should never
411: crash even in case of corrupted input.
412: */
413:
414: typedef voidpf (*alloc_func) OF((voidpf opaque, uInt items, uInt size));
415: typedef void (*free_func) OF((voidpf opaque, voidpf address, uInt size));
416: typedef void (*cb_func) OF((Bytef *buf, uInt len));
417:
418: struct internal_state;
419:
420: typedef struct z_stream_s {
421: Bytef *next_in; /* next input byte */
422: uInt avail_in; /* number of bytes available at next_in */
423: uLong total_in; /* total nb of input bytes read so far */
424: Bytef *next_out; /* next output byte should be put there */
425: uInt avail_out; /* remaining free space at next_out */
426: uLong total_out; /* total nb of bytes output so far */
427: char *msg; /* last error message, NULL if no error */
428: struct internal_state FAR *state; /* not visible by applications */
429: alloc_func zalloc; /* used to allocate the internal state */
430: free_func zfree; /* used to free the internal state */
431: voidpf opaque; /* private data object passed to zalloc and zfree */
432: int data_type; /* best guess about the data type:
433: binary or text */
434: cb_func outcb; /* called regularly just before blocks of output */
435: uLong adler; /* adler32 value of the uncompressed data */
436: uLong reserved; /* reserved for future use */
437: } z_stream;
438:
439: typedef z_stream FAR *z_streamp;
440:
441: /*
442: gzip header information passed to and from zlib routines. See RFC 1952
443: for more details on the meanings of these fields.
444: */
445: typedef struct gz_header_s {
446: int text; /* true if compressed data believed to be text */
447: uLong time; /* modification time */
448: int xflags; /* extra flags (not used when writing a gzip file) */
449: int os; /* operating system */
450: Bytef *extra; /* pointer to extra field or Z_NULL if none */
451: uInt extra_len; /* extra field length (valid if extra != Z_NULL) */
452: uInt extra_max; /* space at extra (only when reading header) */
453: Bytef *name; /* pointer to zero-terminated file name or Z_NULL */
454: uInt name_max; /* space at name (only when reading header) */
455: Bytef *comment; /* pointer to zero-terminated comment or Z_NULL */
456: uInt comm_max; /* space at comment (only when reading header) */
457: int hcrc; /* true if there was or will be a header crc */
458: int done; /* true when done reading gzip header (not used
459: when writing a gzip file) */
460: } gz_header;
461:
462: typedef gz_header FAR *gz_headerp;
463:
464: /* constants */
465: #define Z_NO_FLUSH 0
466: #define Z_PARTIAL_FLUSH 1 /* will be removed, use Z_SYNC_FLUSH instead */
467: #define Z_SYNC_FLUSH 2
468: #define Z_FULL_FLUSH 3
469: #define Z_FINISH 4
470: #define Z_BLOCK 5
471: /* Allowed flush values; see deflate() and inflate() below for details */
472:
473: #define Z_OK 0
474: #define Z_STREAM_END 1
475: #define Z_NEED_DICT 2
476: #define Z_ERRNO (-1)
477: #define Z_STREAM_ERROR (-2)
478: #define Z_DATA_ERROR (-3)
479: #define Z_MEM_ERROR (-4)
480: #define Z_BUF_ERROR (-5)
481: #define Z_VERSION_ERROR (-6)
482: /* Return codes for the compression/decompression functions. Negative
483: * values are errors, positive values are used for special but normal events.
484: */
485:
486: #define Z_NO_COMPRESSION 0
487: #define Z_BEST_SPEED 1
488: #define Z_BEST_COMPRESSION 9
489: #define Z_DEFAULT_COMPRESSION (-1)
490: /* compression levels */
491:
492: #define Z_FILTERED 1
493: #define Z_HUFFMAN_ONLY 2
494: #define Z_RLE 3
495: #define Z_FIXED 4
496: #define Z_DEFAULT_STRATEGY 0
497: /* compression strategy; see deflateInit2() below for details */
498:
499: #define Z_BINARY 0
500: #define Z_TEXT 1
501: #define Z_ASCII Z_TEXT /* for compatibility with 1.2.2 and earlier */
502: #define Z_UNKNOWN 2
503: /* Possible values of the data_type field (though see inflate()) */
504:
505: #define Z_DEFLATED 8
506: /* The deflate compression method (the only one supported in this version) */
507:
508: #define Z_NULL 0 /* for initializing zalloc, zfree, opaque */
509:
510: /* basic functions */
511:
512: /* The application can compare zlibVersion and ZLIB_VERSION for consistency.
513: If the first character differs, the library code actually used is
514: not compatible with the zlib.h header file used by the application.
515: This check is automatically made by deflateInit and inflateInit.
516: */
517:
518: ZEXTERN int ZEXPORT inflateInit_ OF((z_streamp strm, const char *version,
519: int stream_size));
520:
521: ZEXTERN int ZEXPORT inflate OF((z_streamp strm, int flush));
522: /*
523: inflate decompresses as much data as possible, and stops when the input
524: buffer becomes empty or the output buffer becomes full. It may introduce
525: some output latency (reading input without producing any output) except when
526: forced to flush.
527:
528: The detailed semantics are as follows. inflate performs one or both of the
529: following actions:
530:
531: - Decompress more input starting at next_in and update next_in and avail_in
532: accordingly. If not all input can be processed (because there is not
533: enough room in the output buffer), next_in is updated and processing
534: will resume at this point for the next call of inflate().
535:
536: - Provide more output starting at next_out and update next_out and avail_out
537: accordingly. inflate() provides as much output as possible, until there
538: is no more input data or no more space in the output buffer (see below
539: about the flush parameter).
540:
541: Before the call of inflate(), the application should ensure that at least
542: one of the actions is possible, by providing more input and/or consuming
543: more output, and updating the next_* and avail_* values accordingly.
544: The application can consume the uncompressed output when it wants, for
545: example when the output buffer is full (avail_out == 0), or after each
546: call of inflate(). If inflate returns Z_OK and with zero avail_out, it
547: must be called again after making room in the output buffer because there
548: might be more output pending.
549:
550: The flush parameter of inflate() can be Z_NO_FLUSH, Z_SYNC_FLUSH,
551: Z_FINISH, or Z_BLOCK. Z_SYNC_FLUSH requests that inflate() flush as much
552: output as possible to the output buffer. Z_BLOCK requests that inflate() stop
553: if and when it gets to the next deflate block boundary. When decoding the
554: zlib or gzip format, this will cause inflate() to return immediately after
555: the header and before the first block. When doing a raw inflate, inflate()
556: will go ahead and process the first block, and will return when it gets to
557: the end of that block, or when it runs out of data.
558:
559: The Z_BLOCK option assists in appending to or combining deflate streams.
560: Also to assist in this, on return inflate() will set strm->data_type to the
561: number of unused bits in the last byte taken from strm->next_in, plus 64
562: if inflate() is currently decoding the last block in the deflate stream,
563: plus 128 if inflate() returned immediately after decoding an end-of-block
564: code or decoding the complete header up to just before the first byte of the
565: deflate stream. The end-of-block will not be indicated until all of the
566: uncompressed data from that block has been written to strm->next_out. The
567: number of unused bits may in general be greater than seven, except when
568: bit 7 of data_type is set, in which case the number of unused bits will be
569: less than eight.
570:
571: inflate() should normally be called until it returns Z_STREAM_END or an
572: error. However if all decompression is to be performed in a single step
573: (a single call of inflate), the parameter flush should be set to
574: Z_FINISH. In this case all pending input is processed and all pending
575: output is flushed; avail_out must be large enough to hold all the
576: uncompressed data. (The size of the uncompressed data may have been saved
577: by the compressor for this purpose.) The next operation on this stream must
578: be inflateEnd to deallocate the decompression state. The use of Z_FINISH
579: is never required, but can be used to inform inflate that a faster approach
580: may be used for the single inflate() call.
581:
582: In this implementation, inflate() always flushes as much output as
583: possible to the output buffer, and always uses the faster approach on the
584: first call. So the only effect of the flush parameter in this implementation
585: is on the return value of inflate(), as noted below, or when it returns early
586: because Z_BLOCK is used.
587:
588: If a preset dictionary is needed after this call (see inflateSetDictionary
589: below), inflate sets strm->adler to the adler32 checksum of the dictionary
590: chosen by the compressor and returns Z_NEED_DICT; otherwise it sets
591: strm->adler to the adler32 checksum of all output produced so far (that is,
592: total_out bytes) and returns Z_OK, Z_STREAM_END or an error code as described
593: below. At the end of the stream, inflate() checks that its computed adler32
594: checksum is equal to that saved by the compressor and returns Z_STREAM_END
595: only if the checksum is correct.
596:
597: inflate() will decompress and check either zlib-wrapped or gzip-wrapped
598: deflate data. The header type is detected automatically. Any information
599: contained in the gzip header is not retained, so applications that need that
600: information should instead use raw inflate, see inflateInit2() below, or
601: inflateBack() and perform their own processing of the gzip header and
602: trailer.
603:
604: inflate() returns Z_OK if some progress has been made (more input processed
605: or more output produced), Z_STREAM_END if the end of the compressed data has
606: been reached and all uncompressed output has been produced, Z_NEED_DICT if a
607: preset dictionary is needed at this point, Z_DATA_ERROR if the input data was
608: corrupted (input stream not conforming to the zlib format or incorrect check
609: value), Z_STREAM_ERROR if the stream structure was inconsistent (for example
610: if next_in or next_out was NULL), Z_MEM_ERROR if there was not enough memory,
611: Z_BUF_ERROR if no progress is possible or if there was not enough room in the
612: output buffer when Z_FINISH is used. Note that Z_BUF_ERROR is not fatal, and
613: inflate() can be called again with more input and more output space to
614: continue decompressing. If Z_DATA_ERROR is returned, the application may then
615: call inflateSync() to look for a good compression block if a partial recovery
616: of the data is desired.
617: */
618:
619: ZEXTERN int ZEXPORT inflateEnd OF((z_streamp strm));
620: /*
621: All dynamically allocated data structures for this stream are freed.
622: This function discards any unprocessed input and does not flush any
623: pending output.
624:
625: inflateEnd returns Z_OK if success, Z_STREAM_ERROR if the stream state
626: was inconsistent. In the error case, msg may be set but then points to a
627: static string (which must not be deallocated).
628: */
629:
630: /* Advanced functions */
631:
632: ZEXTERN int ZEXPORT inflateReset OF((z_streamp strm));
633:
634: /* utility functions */
635:
636: /*
637: The following utility functions are implemented on top of the
638: basic stream-oriented functions. To simplify the interface, some
639: default options are assumed (compression level and memory usage,
640: standard memory allocation functions). The source code of these
641: utility functions can easily be modified if you need special options.
642: */
643:
644: ZEXTERN uLong ZEXPORT adler32 OF((uLong adler, const Bytef *buf, uInt len));
645: /*
646: Update a running Adler-32 checksum with the bytes buf[0..len-1] and
647: return the updated checksum. If buf is NULL, this function returns
648: the required initial value for the checksum.
649: An Adler-32 checksum is almost as reliable as a CRC32 but can be computed
650: much faster. Usage example:
651:
652: uLong adler = adler32(0L, Z_NULL, 0);
653:
654: while (read_buffer(buffer, length) != EOF) {
655: adler = adler32(adler, buffer, length);
656: }
657: if (adler != original_adler) error();
658: */
659:
660: /*
661: Combine two Adler-32 checksums into one. For two sequences of bytes, seq1
662: and seq2 with lengths len1 and len2, Adler-32 checksums were calculated for
663: each, adler1 and adler2. adler32_combine() returns the Adler-32 checksum of
664: seq1 and seq2 concatenated, requiring only adler1, adler2, and len2.
665: */
666:
667: ZEXTERN uInt ZEXPORT crc32 OF((uInt crc, const Bytef *buf, uInt len));
668: /*
669: Update a running CRC-32 with the bytes buf[0..len-1] and return the
670: updated CRC-32. If buf is NULL, this function returns the required initial
671: value for the for the crc. Pre- and post-conditioning (one's complement) is
672: performed within this function so it shouldn't be done by the application.
673: Usage example:
674:
675: uLong crc = crc32(0L, Z_NULL, 0);
676:
677: while (read_buffer(buffer, length) != EOF) {
678: crc = crc32(crc, buffer, length);
679: }
680: if (crc != original_crc) error();
681: */
682:
683: ZEXTERN int ZEXPORT inflateInit2_ OF((z_streamp strm, int windowBits,
684: const char *version, int stream_size));
685: #define inflateInit(strm) \
686: inflateInit_((strm), ZLIB_VERSION, sizeof(z_stream))
687: #define inflateInit2(strm, windowBits) \
688: inflateInit2_((strm), (windowBits), ZLIB_VERSION, sizeof(z_stream))
689:
690: #if !defined(ZUTIL_H) && !defined(NO_DUMMY_DECL)
691: struct internal_state {int dummy;}; /* hack for buggy compilers */
692: #endif
693:
694: #ifdef __cplusplus
695: }
696: #endif
697:
698: #endif /* ZLIB_H */
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