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4477 lines
143 KiB
C++
4477 lines
143 KiB
C++
#include "sys/platform.h"
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#include "idlib/Heap.h"
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#include "idlib/Lib.h"
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#include "framework/Unzip.h"
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/* unzip.h -- IO for uncompress .zip files using zlib
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Version 0.15 beta, Mar 19th, 1998,
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Copyright (C) 1998 Gilles Vollant
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This unzip package allow extract file from .ZIP file, compatible with PKZip 2.04g
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WinZip, InfoZip tools and compatible.
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Encryption and multi volume ZipFile (span) are not supported.
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Old compressions used by old PKZip 1.x are not supported
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THIS IS AN ALPHA VERSION. AT THIS STAGE OF DEVELOPPEMENT, SOMES API OR STRUCTURE
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CAN CHANGE IN FUTURE VERSION !!
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I WAIT FEEDBACK at mail info@winimage.com
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Visit also http://www.winimage.com/zLibDll/unzip.htm for evolution
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Condition of use and distribution are the same than zlib :
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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/* for more info about .ZIP format, see
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ftp://ftp.cdrom.com/pub/infozip/doc/appnote-970311-iz.zip
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PkWare has also a specification at :
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ftp://ftp.pkware.com/probdesc.zip */
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/* zlib.h -- interface of the 'zlib' general purpose compression library
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version 1.1.3, July 9th, 1998
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Copyright (C) 1995-1998 Jean-loup Gailly and Mark Adler
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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Jean-loup Gailly Mark Adler
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jloup@gzip.org madler@alumni.caltech.edu
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The data format used by the zlib library is described by RFCs (Request for
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Comments) 1950 to 1952 in the files ftp://ds.internic.net/rfc/rfc1950.txt
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(zlib format), rfc1951.txt (deflate format) and rfc1952.txt (gzip format).
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*/
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/* zconf.h -- configuration of the zlib compression library
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* Copyright (C) 1995-1998 Jean-loup Gailly.
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* For conditions of distribution and use, see copyright notice in zlib.h
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*/
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/* @(#) $Id: unzip.c,v 1.2 1999/09/07 20:51:25 zoid Exp $ */
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#ifndef _ZCONF_H
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#define _ZCONF_H
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/* Maximum value for memLevel in deflateInit2 */
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#ifndef MAX_MEM_LEVEL
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# ifdef MAXSEG_64K
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# define MAX_MEM_LEVEL 8
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# else
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# define MAX_MEM_LEVEL 9
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# endif
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#endif
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/* Maximum value for windowBits in deflateInit2 and inflateInit2.
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* WARNING: reducing MAX_WBITS makes minigzip unable to extract .gz files
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* created by gzip. (Files created by minigzip can still be extracted by
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* gzip.)
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*/
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#ifndef MAX_WBITS
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# define MAX_WBITS 15 /* 32K LZ77 window */
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#endif
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/* The memory requirements for deflate are (in bytes):
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(1 << (windowBits+2)) + (1 << (memLevel+9))
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that is: 128K for windowBits=15 + 128K for memLevel = 8 (default values)
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plus a few kilobytes for small objects. For example, if you want to reduce
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the default memory requirements from 256K to 128K, compile with
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make CFLAGS="-O -DMAX_WBITS=14 -DMAX_MEM_LEVEL=7"
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Of course this will generally degrade compression (there's no free lunch).
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The memory requirements for inflate are (in bytes) 1 << windowBits
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that is, 32K for windowBits=15 (default value) plus a few kilobytes
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for small objects.
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*/
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/* Type declarations */
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#ifndef OF /* function prototypes */
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#define OF(args) args
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#endif
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typedef unsigned char Byte; /* 8 bits */
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typedef unsigned int uInt; /* 16 bits or more */
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typedef unsigned long uLong; /* 32 bits or more */
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typedef Byte *voidp;
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#ifndef SEEK_SET
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# define SEEK_SET 0 /* Seek from beginning of file. */
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# define SEEK_CUR 1 /* Seek from current position. */
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# define SEEK_END 2 /* Set file pointer to EOF plus "offset" */
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#endif
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#endif /* _ZCONF_H */
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#define ZLIB_VERSION "1.1.3"
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/*
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The 'zlib' compression library provides in-memory compression and
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decompression functions, including integrity checks of the uncompressed
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data. This version of the library supports only one compression method
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(deflation) but other algorithms will be added later and will have the same
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stream interface.
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Compression can be done in a single step if the buffers are large
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enough (for example if an input file is mmap'ed), or can be done by
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repeated calls of the compression function. In the latter case, the
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application must provide more input and/or consume the output
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(providing more output space) before each call.
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The library also supports reading and writing files in gzip (.gz) format
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with an interface similar to that of stdio.
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The library does not install any signal handler. The decoder checks
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the consistency of the compressed data, so the library should never
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crash even in case of corrupted input.
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*/
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/*
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The application must update next_in and avail_in when avail_in has
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dropped to zero. It must update next_out and avail_out when avail_out
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has dropped to zero. The application must initialize zalloc, zfree and
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opaque before calling the init function. All other fields are set by the
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compression library and must not be updated by the application.
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The opaque value provided by the application will be passed as the first
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parameter for calls of zalloc and zfree. This can be useful for custom
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memory management. The compression library attaches no meaning to the
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opaque value.
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zalloc must return Z_NULL if there is not enough memory for the object.
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If zlib is used in a multi-threaded application, zalloc and zfree must be
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thread safe.
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On 16-bit systems, the functions zalloc and zfree must be able to allocate
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exactly 65536 bytes, but will not be required to allocate more than this
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if the symbol MAXSEG_64K is defined (see zconf.h). WARNING: On MSDOS,
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pointers returned by zalloc for objects of exactly 65536 bytes *must*
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have their offset normalized to zero. The default allocation function
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provided by this library ensures this (see zutil.c). To reduce memory
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requirements and avoid any allocation of 64K objects, at the expense of
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compression ratio, compile the library with -DMAX_WBITS=14 (see zconf.h).
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The fields total_in and total_out can be used for statistics or
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progress reports. After compression, total_in holds the total size of
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the uncompressed data and may be saved for use in the decompressor
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(particularly if the decompressor wants to decompress everything in
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a single step).
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*/
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/* constants */
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#define Z_NO_FLUSH 0
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#define Z_PARTIAL_FLUSH 1 /* will be removed, use Z_SYNC_FLUSH instead */
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#define Z_SYNC_FLUSH 2
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#define Z_FULL_FLUSH 3
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#define Z_FINISH 4
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/* Allowed flush values; see deflate() below for details */
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#define Z_OK 0
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#define Z_STREAM_END 1
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#define Z_NEED_DICT 2
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#define Z_ERRNO (-1)
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#define Z_STREAM_ERROR (-2)
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#define Z_DATA_ERROR (-3)
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#define Z_MEM_ERROR (-4)
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#define Z_BUF_ERROR (-5)
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#define Z_VERSION_ERROR (-6)
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/* Return codes for the compression/decompression functions. Negative
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* values are errors, positive values are used for special but normal events.
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*/
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#define Z_NO_COMPRESSION 0
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#define Z_BEST_SPEED 1
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#define Z_BEST_COMPRESSION 9
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#define Z_DEFAULT_COMPRESSION (-1)
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/* compression levels */
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#define Z_FILTERED 1
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#define Z_HUFFMAN_ONLY 2
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#define Z_DEFAULT_STRATEGY 0
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/* compression strategy; see deflateInit2() below for details */
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#define Z_BINARY 0
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#define Z_ASCII 1
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#define Z_UNKNOWN 2
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/* Possible values of the data_type field */
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#define Z_DEFLATED 8
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/* The deflate compression method (the only one supported in this version) */
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#define Z_NULL 0 /* for initializing zalloc, zfree, opaque */
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#define zlib_version zlibVersion()
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/* for compatibility with versions < 1.0.2 */
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/* basic functions */
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const char * zlibVersion OF((void));
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/* The application can compare zlibVersion and ZLIB_VERSION for consistency.
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If the first character differs, the library code actually used is
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not compatible with the zlib.h header file used by the application.
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This check is automatically made by deflateInit and inflateInit.
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*/
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/*
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int deflateInit OF((z_streamp strm, int level));
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Initializes the internal stream state for compression. The fields
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zalloc, zfree and opaque must be initialized before by the caller.
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If zalloc and zfree are set to Z_NULL, deflateInit updates them to
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use default allocation functions.
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The compression level must be Z_DEFAULT_COMPRESSION, or between 0 and 9:
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1 gives best speed, 9 gives best compression, 0 gives no compression at
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all (the input data is simply copied a block at a time).
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Z_DEFAULT_COMPRESSION requests a default compromise between speed and
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compression (currently equivalent to level 6).
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deflateInit returns Z_OK if success, Z_MEM_ERROR if there was not
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enough memory, Z_STREAM_ERROR if level is not a valid compression level,
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Z_VERSION_ERROR if the zlib library version (zlib_version) is incompatible
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with the version assumed by the caller (ZLIB_VERSION).
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msg is set to null if there is no error message. deflateInit does not
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perform any compression: this will be done by deflate().
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*/
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int deflate OF((z_streamp strm, int flush));
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/*
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deflate compresses as much data as possible, and stops when the input
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buffer becomes empty or the output buffer becomes full. It may introduce some
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output latency (reading input without producing any output) except when
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forced to flush.
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The detailed semantics are as follows. deflate performs one or both of the
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following actions:
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- Compress more input starting at next_in and update next_in and avail_in
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accordingly. If not all input can be processed (because there is not
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enough room in the output buffer), next_in and avail_in are updated and
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processing will resume at this point for the next call of deflate().
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- Provide more output starting at next_out and update next_out and avail_out
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accordingly. This action is forced if the parameter flush is non zero.
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Forcing flush frequently degrades the compression ratio, so this parameter
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should be set only when necessary (in interactive applications).
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Some output may be provided even if flush is not set.
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Before the call of deflate(), the application should ensure that at least
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one of the actions is possible, by providing more input and/or consuming
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more output, and updating avail_in or avail_out accordingly; avail_out
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should never be zero before the call. The application can consume the
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compressed output when it wants, for example when the output buffer is full
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(avail_out == 0), or after each call of deflate(). If deflate returns Z_OK
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and with zero avail_out, it must be called again after making room in the
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output buffer because there might be more output pending.
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If the parameter flush is set to Z_SYNC_FLUSH, all pending output is
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flushed to the output buffer and the output is aligned on a byte boundary, so
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that the decompressor can get all input data available so far. (In particular
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avail_in is zero after the call if enough output space has been provided
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before the call.) Flushing may degrade compression for some compression
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algorithms and so it should be used only when necessary.
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If flush is set to Z_FULL_FLUSH, all output is flushed as with
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Z_SYNC_FLUSH, and the compression state is reset so that decompression can
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restart from this point if previous compressed data has been damaged or if
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random access is desired. Using Z_FULL_FLUSH too often can seriously degrade
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the compression.
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If deflate returns with avail_out == 0, this function must be called again
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with the same value of the flush parameter and more output space (updated
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avail_out), until the flush is complete (deflate returns with non-zero
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avail_out).
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If the parameter flush is set to Z_FINISH, pending input is processed,
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pending output is flushed and deflate returns with Z_STREAM_END if there
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was enough output space; if deflate returns with Z_OK, this function must be
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called again with Z_FINISH and more output space (updated avail_out) but no
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more input data, until it returns with Z_STREAM_END or an error. After
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deflate has returned Z_STREAM_END, the only possible operations on the
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stream are deflateReset or deflateEnd.
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Z_FINISH can be used immediately after deflateInit if all the compression
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is to be done in a single step. In this case, avail_out must be at least
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0.1% larger than avail_in plus 12 bytes. If deflate does not return
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Z_STREAM_END, then it must be called again as described above.
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deflate() sets strm->adler to the adler32 checksum of all input read
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so (that is, total_in bytes).
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deflate() may update data_type if it can make a good guess about
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the input data type (Z_ASCII or Z_BINARY). In doubt, the data is considered
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binary. This field is only for information purposes and does not affect
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the compression algorithm in any manner.
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deflate() returns Z_OK if some progress has been made (more input
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processed or more output produced), Z_STREAM_END if all input has been
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consumed and all output has been produced (only when flush is set to
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Z_FINISH), Z_STREAM_ERROR if the stream state was inconsistent (for example
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if next_in or next_out was NULL), Z_BUF_ERROR if no progress is possible
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(for example avail_in or avail_out was zero).
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*/
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int deflateEnd OF((z_streamp strm));
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/*
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All dynamically allocated data structures for this stream are freed.
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This function discards any unprocessed input and does not flush any
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pending output.
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deflateEnd returns Z_OK if success, Z_STREAM_ERROR if the
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stream state was inconsistent, Z_DATA_ERROR if the stream was freed
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prematurely (some input or output was discarded). In the error case,
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msg may be set but then points to a static string (which must not be
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deallocated).
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*/
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/*
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int inflateInit OF((z_streamp strm));
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Initializes the internal stream state for decompression. The fields
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next_in, avail_in, zalloc, zfree and opaque must be initialized before by
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the caller. If next_in is not Z_NULL and avail_in is large enough (the exact
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value depends on the compression method), inflateInit determines the
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compression method from the zlib header and allocates all data structures
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accordingly; otherwise the allocation will be deferred to the first call of
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inflate. If zalloc and zfree are set to Z_NULL, inflateInit updates them to
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use default allocation functions.
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inflateInit returns Z_OK if success, Z_MEM_ERROR if there was not enough
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memory, Z_VERSION_ERROR if the zlib library version is incompatible with the
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version assumed by the caller. msg is set to null if there is no error
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message. inflateInit does not perform any decompression apart from reading
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the zlib header if present: this will be done by inflate(). (So next_in and
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avail_in may be modified, but next_out and avail_out are unchanged.)
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*/
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int inflate OF((z_streamp strm, int flush));
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/*
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inflate decompresses as much data as possible, and stops when the input
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buffer becomes empty or the output buffer becomes full. It may some
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introduce some output latency (reading input without producing any output)
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except when forced to flush.
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The detailed semantics are as follows. inflate performs one or both of the
|
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following actions:
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- Decompress more input starting at next_in and update next_in and avail_in
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accordingly. If not all input can be processed (because there is not
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enough room in the output buffer), next_in is updated and processing
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will resume at this point for the next call of inflate().
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- Provide more output starting at next_out and update next_out and avail_out
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accordingly. inflate() provides as much output as possible, until there
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is no more input data or no more space in the output buffer (see below
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about the flush parameter).
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Before the call of inflate(), the application should ensure that at least
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one of the actions is possible, by providing more input and/or consuming
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more output, and updating the next_* and avail_* values accordingly.
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The application can consume the uncompressed output when it wants, for
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example when the output buffer is full (avail_out == 0), or after each
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call of inflate(). If inflate returns Z_OK and with zero avail_out, it
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must be called again after making room in the output buffer because there
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might be more output pending.
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If the parameter flush is set to Z_SYNC_FLUSH, inflate flushes as much
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output as possible to the output buffer. The flushing behavior of inflate is
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not specified for values of the flush parameter other than Z_SYNC_FLUSH
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and Z_FINISH, but the current implementation actually flushes as much output
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as possible anyway.
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inflate() should normally be called until it returns Z_STREAM_END or an
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error. However if all decompression is to be performed in a single step
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(a single call of inflate), the parameter flush should be set to
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Z_FINISH. In this case all pending input is processed and all pending
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output is flushed; avail_out must be large enough to hold all the
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uncompressed data. (The size of the uncompressed data may have been saved
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by the compressor for this purpose.) The next operation on this stream must
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be inflateEnd to deallocate the decompression state. The use of Z_FINISH
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is never required, but can be used to inform inflate that a faster routine
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may be used for the single inflate() call.
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If a preset dictionary is needed at this point (see inflateSetDictionary
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below), inflate sets strm-adler to the adler32 checksum of the
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dictionary chosen by the compressor and returns Z_NEED_DICT; otherwise
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it sets strm->adler to the adler32 checksum of all output produced
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so (that is, total_out bytes) and returns Z_OK, Z_STREAM_END or
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an error code as described below. At the end of the stream, inflate()
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checks that its computed adler32 checksum is equal to that saved by the
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compressor and returns Z_STREAM_END only if the checksum is correct.
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inflate() returns Z_OK if some progress has been made (more input processed
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or more output produced), Z_STREAM_END if the end of the compressed data has
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been reached and all uncompressed output has been produced, Z_NEED_DICT if a
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preset dictionary is needed at this point, Z_DATA_ERROR if the input data was
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corrupted (input stream not conforming to the zlib format or incorrect
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adler32 checksum), Z_STREAM_ERROR if the stream structure was inconsistent
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(for example if next_in or next_out was NULL), Z_MEM_ERROR if there was not
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enough memory, Z_BUF_ERROR if no progress is possible or if there was not
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enough room in the output buffer when Z_FINISH is used. In the Z_DATA_ERROR
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case, the application may then call inflateSync to look for a good
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compression block.
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*/
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int inflateEnd OF((z_streamp strm));
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|
/*
|
|
All dynamically allocated data structures for this stream are freed.
|
|
This function discards any unprocessed input and does not flush any
|
|
pending output.
|
|
|
|
inflateEnd returns Z_OK if success, Z_STREAM_ERROR if the stream state
|
|
was inconsistent. In the error case, msg may be set but then points to a
|
|
static string (which must not be deallocated).
|
|
*/
|
|
|
|
/* Advanced functions */
|
|
|
|
/*
|
|
The following functions are needed only in some special applications.
|
|
*/
|
|
|
|
/*
|
|
int deflateInit2 OF((z_streamp strm,
|
|
int level,
|
|
int method,
|
|
int windowBits,
|
|
int memLevel,
|
|
int strategy));
|
|
|
|
This is another version of deflateInit with more compression options. The
|
|
fields next_in, zalloc, zfree and opaque must be initialized before by
|
|
the caller.
|
|
|
|
The method parameter is the compression method. It must be Z_DEFLATED in
|
|
this version of the library.
|
|
|
|
The windowBits parameter is the base two logarithm of the window size
|
|
(the size of the history buffer). It should be in the range 8..15 for this
|
|
version of the library. Larger values of this parameter result in better
|
|
compression at the expense of memory usage. The default value is 15 if
|
|
deflateInit is used instead.
|
|
|
|
The memLevel parameter specifies how much memory should be allocated
|
|
for the internal compression state. memLevel=1 uses minimum memory but
|
|
is slow and reduces compression ratio; memLevel=9 uses maximum memory
|
|
for optimal speed. The default value is 8. See zconf.h for total memory
|
|
usage as a function of windowBits and memLevel.
|
|
|
|
The strategy parameter is used to tune the compression algorithm. Use the
|
|
value Z_DEFAULT_STRATEGY for normal data, Z_FILTERED for data produced by a
|
|
filter (or predictor), or Z_HUFFMAN_ONLY to force Huffman encoding only (no
|
|
string match). Filtered data consists mostly of small values with a
|
|
somewhat random distribution. In this case, the compression algorithm is
|
|
tuned to compress them better. The effect of Z_FILTERED is to force more
|
|
Huffman coding and less string matching; it is somewhat intermediate
|
|
between Z_DEFAULT and Z_HUFFMAN_ONLY. The strategy parameter only affects
|
|
the compression ratio but not the correctness of the compressed output even
|
|
if it is not set appropriately.
|
|
|
|
deflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
|
|
memory, Z_STREAM_ERROR if a parameter is invalid (such as an invalid
|
|
method). msg is set to null if there is no error message. deflateInit2 does
|
|
not perform any compression: this will be done by deflate().
|
|
*/
|
|
|
|
int deflateSetDictionary OF((z_streamp strm,
|
|
const Byte *dictionary,
|
|
uInt dictLength));
|
|
/*
|
|
Initializes the compression dictionary from the given byte sequence
|
|
without producing any compressed output. This function must be called
|
|
immediately after deflateInit, deflateInit2 or deflateReset, before any
|
|
call of deflate. The compressor and decompressor must use exactly the same
|
|
dictionary (see inflateSetDictionary).
|
|
|
|
The dictionary should consist of strings (byte sequences) that are likely
|
|
to be encountered later in the data to be compressed, with the most commonly
|
|
used strings preferably put towards the end of the dictionary. Using a
|
|
dictionary is most useful when the data to be compressed is short and can be
|
|
predicted with good accuracy; the data can then be compressed better than
|
|
with the default empty dictionary.
|
|
|
|
Depending on the size of the compression data structures selected by
|
|
deflateInit or deflateInit2, a part of the dictionary may in effect be
|
|
discarded, for example if the dictionary is larger than the window size in
|
|
deflate or deflate2. Thus the strings most likely to be useful should be
|
|
put at the end of the dictionary, not at the front.
|
|
|
|
Upon return of this function, strm->adler is set to the Adler32 value
|
|
of the dictionary; the decompressor may later use this value to determine
|
|
which dictionary has been used by the compressor. (The Adler32 value
|
|
applies to the whole dictionary even if only a subset of the dictionary is
|
|
actually used by the compressor.)
|
|
|
|
deflateSetDictionary returns Z_OK if success, or Z_STREAM_ERROR if a
|
|
parameter is invalid (such as NULL dictionary) or the stream state is
|
|
inconsistent (for example if deflate has already been called for this stream
|
|
or if the compression method is bsort). deflateSetDictionary does not
|
|
perform any compression: this will be done by deflate().
|
|
*/
|
|
|
|
int deflateCopy OF((z_streamp dest,
|
|
z_streamp source));
|
|
/*
|
|
Sets the destination stream as a complete copy of the source stream.
|
|
|
|
This function can be useful when several compression strategies will be
|
|
tried, for example when there are several ways of pre-processing the input
|
|
data with a filter. The streams that will be discarded should then be freed
|
|
by calling deflateEnd. Note that deflateCopy duplicates the internal
|
|
compression state which can be quite large, so this strategy is slow and
|
|
can consume lots of memory.
|
|
|
|
deflateCopy returns Z_OK if success, Z_MEM_ERROR if there was not
|
|
enough memory, Z_STREAM_ERROR if the source stream state was inconsistent
|
|
(such as zalloc being NULL). msg is left unchanged in both source and
|
|
destination.
|
|
*/
|
|
|
|
int deflateReset OF((z_streamp strm));
|
|
/*
|
|
This function is equivalent to deflateEnd followed by deflateInit,
|
|
but does not free and reallocate all the internal compression state.
|
|
The stream will keep the same compression level and any other attributes
|
|
that may have been set by deflateInit2.
|
|
|
|
deflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source
|
|
stream state was inconsistent (such as zalloc or state being NULL).
|
|
*/
|
|
|
|
int deflateParams OF((z_streamp strm,
|
|
int level,
|
|
int strategy));
|
|
/*
|
|
Dynamically update the compression level and compression strategy. The
|
|
interpretation of level and strategy is as in deflateInit2. This can be
|
|
used to switch between compression and straight copy of the input data, or
|
|
to switch to a different kind of input data requiring a different
|
|
strategy. If the compression level is changed, the input available so far
|
|
is compressed with the old level (and may be flushed); the new level will
|
|
take effect only at the next call of deflate().
|
|
|
|
Before the call of deflateParams, the stream state must be set as for
|
|
a call of deflate(), since the currently available input may have to
|
|
be compressed and flushed. In particular, strm->avail_out must be non-zero.
|
|
|
|
deflateParams returns Z_OK if success, Z_STREAM_ERROR if the source
|
|
stream state was inconsistent or if a parameter was invalid, Z_BUF_ERROR
|
|
if strm->avail_out was zero.
|
|
*/
|
|
|
|
/*
|
|
int inflateInit2 OF((z_streamp strm,
|
|
int windowBits));
|
|
|
|
This is another version of inflateInit with an extra parameter. The
|
|
fields next_in, avail_in, zalloc, zfree and opaque must be initialized
|
|
before by the caller.
|
|
|
|
The windowBits parameter is the base two logarithm of the maximum window
|
|
size (the size of the history buffer). It should be in the range 8..15 for
|
|
this version of the library. The default value is 15 if inflateInit is used
|
|
instead. If a compressed stream with a larger window size is given as
|
|
input, inflate() will return with the error code Z_DATA_ERROR instead of
|
|
trying to allocate a larger window.
|
|
|
|
inflateInit2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
|
|
memory, Z_STREAM_ERROR if a parameter is invalid (such as a negative
|
|
memLevel). msg is set to null if there is no error message. inflateInit2
|
|
does not perform any decompression apart from reading the zlib header if
|
|
present: this will be done by inflate(). (So next_in and avail_in may be
|
|
modified, but next_out and avail_out are unchanged.)
|
|
*/
|
|
|
|
int inflateSetDictionary OF((z_streamp strm,
|
|
const Byte *dictionary,
|
|
uInt dictLength));
|
|
/*
|
|
Initializes the decompression dictionary from the given uncompressed byte
|
|
sequence. This function must be called immediately after a call of inflate
|
|
if this call returned Z_NEED_DICT. The dictionary chosen by the compressor
|
|
can be determined from the Adler32 value returned by this call of
|
|
inflate. The compressor and decompressor must use exactly the same
|
|
dictionary (see deflateSetDictionary).
|
|
|
|
inflateSetDictionary returns Z_OK if success, Z_STREAM_ERROR if a
|
|
parameter is invalid (such as NULL dictionary) or the stream state is
|
|
inconsistent, Z_DATA_ERROR if the given dictionary doesn't match the
|
|
expected one (incorrect Adler32 value). inflateSetDictionary does not
|
|
perform any decompression: this will be done by subsequent calls of
|
|
inflate().
|
|
*/
|
|
|
|
int inflateSync OF((z_streamp strm));
|
|
/*
|
|
Skips invalid compressed data until a full flush point (see above the
|
|
description of deflate with Z_FULL_FLUSH) can be found, or until all
|
|
available input is skipped. No output is provided.
|
|
|
|
inflateSync returns Z_OK if a full flush point has been found, Z_BUF_ERROR
|
|
if no more input was provided, Z_DATA_ERROR if no flush point has been found,
|
|
or Z_STREAM_ERROR if the stream structure was inconsistent. In the success
|
|
case, the application may save the current current value of total_in which
|
|
indicates where valid compressed data was found. In the error case, the
|
|
application may repeatedly call inflateSync, providing more input each time,
|
|
until success or end of the input data.
|
|
*/
|
|
|
|
int inflateReset OF((z_streamp strm));
|
|
/*
|
|
This function is equivalent to inflateEnd followed by inflateInit,
|
|
but does not free and reallocate all the internal decompression state.
|
|
The stream will keep attributes that may have been set by inflateInit2.
|
|
|
|
inflateReset returns Z_OK if success, or Z_STREAM_ERROR if the source
|
|
stream state was inconsistent (such as zalloc or state being NULL).
|
|
*/
|
|
|
|
|
|
/* utility functions */
|
|
|
|
/*
|
|
The following utility functions are implemented on top of the
|
|
basic stream-oriented functions. To simplify the interface, some
|
|
default options are assumed (compression level and memory usage,
|
|
standard memory allocation functions). The source code of these
|
|
utility functions can easily be modified if you need special options.
|
|
*/
|
|
|
|
int compress OF((Byte *dest, uLong *destLen,
|
|
const Byte *source, uLong sourceLen));
|
|
/*
|
|
Compresses the source buffer into the destination buffer. sourceLen is
|
|
the byte length of the source buffer. Upon entry, destLen is the total
|
|
size of the destination buffer, which must be at least 0.1% larger than
|
|
sourceLen plus 12 bytes. Upon exit, destLen is the actual size of the
|
|
compressed buffer.
|
|
This function can be used to compress a whole file at once if the
|
|
input file is mmap'ed.
|
|
compress returns Z_OK if success, Z_MEM_ERROR if there was not
|
|
enough memory, Z_BUF_ERROR if there was not enough room in the output
|
|
buffer.
|
|
*/
|
|
|
|
int compress2 OF((Byte *dest, uLong *destLen,
|
|
const Byte *source, uLong sourceLen,
|
|
int level));
|
|
/*
|
|
Compresses the source buffer into the destination buffer. The level
|
|
parameter has the same meaning as in deflateInit. sourceLen is the byte
|
|
length of the source buffer. Upon entry, destLen is the total size of the
|
|
destination buffer, which must be at least 0.1% larger than sourceLen plus
|
|
12 bytes. Upon exit, destLen is the actual size of the compressed buffer.
|
|
|
|
compress2 returns Z_OK if success, Z_MEM_ERROR if there was not enough
|
|
memory, Z_BUF_ERROR if there was not enough room in the output buffer,
|
|
Z_STREAM_ERROR if the level parameter is invalid.
|
|
*/
|
|
|
|
int uncompress OF((Byte *dest, uLong *destLen,
|
|
const Byte *source, uLong sourceLen));
|
|
/*
|
|
Decompresses the source buffer into the destination buffer. sourceLen is
|
|
the byte length of the source buffer. Upon entry, destLen is the total
|
|
size of the destination buffer, which must be large enough to hold the
|
|
entire uncompressed data. (The size of the uncompressed data must have
|
|
been saved previously by the compressor and transmitted to the decompressor
|
|
by some mechanism outside the scope of this compression library.)
|
|
Upon exit, destLen is the actual size of the compressed buffer.
|
|
This function can be used to decompress a whole file at once if the
|
|
input file is mmap'ed.
|
|
|
|
uncompress returns Z_OK if success, Z_MEM_ERROR if there was not
|
|
enough memory, Z_BUF_ERROR if there was not enough room in the output
|
|
buffer, or Z_DATA_ERROR if the input data was corrupted.
|
|
*/
|
|
|
|
|
|
typedef voidp gzFile;
|
|
|
|
gzFile gzopen OF((const char *path, const char *mode));
|
|
/*
|
|
Opens a gzip (.gz) file for reading or writing. The mode parameter
|
|
is as in fopen ("rb" or "wb") but can also include a compression level
|
|
("wb9") or a strategy: 'f' for filtered data as in "wb6f", 'h' for
|
|
Huffman only compression as in "wb1h". (See the description
|
|
of deflateInit2 for more information about the strategy parameter.)
|
|
|
|
gzopen can be used to read a file which is not in gzip format; in this
|
|
case gzread will directly read from the file without decompression.
|
|
|
|
gzopen returns NULL if the file could not be opened or if there was
|
|
insufficient memory to allocate the (de)compression state; errno
|
|
can be checked to distinguish the two cases (if errno is zero, the
|
|
zlib error is Z_MEM_ERROR). */
|
|
|
|
gzFile gzdopen OF((int fd, const char *mode));
|
|
/*
|
|
gzdopen() associates a gzFile with the file descriptor fd. File
|
|
descriptors are obtained from calls like open, dup, creat, pipe or
|
|
fileno (in the file has been previously opened with fopen).
|
|
The mode parameter is as in gzopen.
|
|
The next call of gzclose on the returned gzFile will also close the
|
|
file descriptor fd, just like fclose(fdopen(fd), mode) closes the file
|
|
descriptor fd. If you want to keep fd open, use gzdopen(dup(fd), mode).
|
|
gzdopen returns NULL if there was insufficient memory to allocate
|
|
the (de)compression state.
|
|
*/
|
|
|
|
int gzsetparams OF((gzFile file, int level, int strategy));
|
|
/*
|
|
Dynamically update the compression level or strategy. See the description
|
|
of deflateInit2 for the meaning of these parameters.
|
|
gzsetparams returns Z_OK if success, or Z_STREAM_ERROR if the file was not
|
|
opened for writing.
|
|
*/
|
|
|
|
int gzread OF((gzFile file, voidp buf, unsigned len));
|
|
/*
|
|
Reads the given number of uncompressed bytes from the compressed file.
|
|
If the input file was not in gzip format, gzread copies the given number
|
|
of bytes into the buffer.
|
|
gzread returns the number of uncompressed bytes actually read (0 for
|
|
end of file, -1 for error). */
|
|
|
|
int gzwrite OF((gzFile file,
|
|
const voidp buf, unsigned len));
|
|
/*
|
|
Writes the given number of uncompressed bytes into the compressed file.
|
|
gzwrite returns the number of uncompressed bytes actually written
|
|
(0 in case of error).
|
|
*/
|
|
|
|
int gzprintf OF((gzFile file, const char *format, ...));
|
|
/*
|
|
Converts, formats, and writes the args to the compressed file under
|
|
control of the format string, as in fprintf. gzprintf returns the number of
|
|
uncompressed bytes actually written (0 in case of error).
|
|
*/
|
|
|
|
int gzputs OF((gzFile file, const char *s));
|
|
/*
|
|
Writes the given null-terminated string to the compressed file, excluding
|
|
the terminating null character.
|
|
gzputs returns the number of characters written, or -1 in case of error.
|
|
*/
|
|
|
|
char * gzgets OF((gzFile file, char *buf, int len));
|
|
/*
|
|
Reads bytes from the compressed file until len-1 characters are read, or
|
|
a newline character is read and transferred to buf, or an end-of-file
|
|
condition is encountered. The string is then terminated with a null
|
|
character.
|
|
gzgets returns buf, or Z_NULL in case of error.
|
|
*/
|
|
|
|
int gzputc OF((gzFile file, int c));
|
|
/*
|
|
Writes c, converted to an unsigned char, into the compressed file.
|
|
gzputc returns the value that was written, or -1 in case of error.
|
|
*/
|
|
|
|
int gzgetc OF((gzFile file));
|
|
/*
|
|
Reads one byte from the compressed file. gzgetc returns this byte
|
|
or -1 in case of end of file or error.
|
|
*/
|
|
|
|
int gzflush OF((gzFile file, int flush));
|
|
/*
|
|
Flushes all pending output into the compressed file. The parameter
|
|
flush is as in the deflate() function. The return value is the zlib
|
|
error number (see function gzerror below). gzflush returns Z_OK if
|
|
the flush parameter is Z_FINISH and all output could be flushed.
|
|
gzflush should be called only when strictly necessary because it can
|
|
degrade compression.
|
|
*/
|
|
|
|
long gzseek OF((gzFile file,
|
|
long offset, int whence));
|
|
/*
|
|
Sets the starting position for the next gzread or gzwrite on the
|
|
given compressed file. The offset represents a number of bytes in the
|
|
uncompressed data stream. The whence parameter is defined as in lseek(2);
|
|
the value SEEK_END is not supported.
|
|
If the file is opened for reading, this function is emulated but can be
|
|
extremely slow. If the file is opened for writing, only forward seeks are
|
|
supported; gzseek then compresses a sequence of zeroes up to the new
|
|
starting position.
|
|
|
|
gzseek returns the resulting offset location as measured in bytes from
|
|
the beginning of the uncompressed stream, or -1 in case of error, in
|
|
particular if the file is opened for writing and the new starting position
|
|
would be before the current position.
|
|
*/
|
|
|
|
int gzrewind OF((gzFile file));
|
|
/*
|
|
Rewinds the given file. This function is supported only for reading.
|
|
|
|
gzrewind(file) is equivalent to (int)gzseek(file, 0L, SEEK_SET)
|
|
*/
|
|
|
|
long gztell OF((gzFile file));
|
|
/*
|
|
Returns the starting position for the next gzread or gzwrite on the
|
|
given compressed file. This position represents a number of bytes in the
|
|
uncompressed data stream.
|
|
|
|
gztell(file) is equivalent to gzseek(file, 0L, SEEK_CUR)
|
|
*/
|
|
|
|
int gzeof OF((gzFile file));
|
|
/*
|
|
Returns 1 when EOF has previously been detected reading the given
|
|
input stream, otherwise zero.
|
|
*/
|
|
|
|
int gzclose OF((gzFile file));
|
|
/*
|
|
Flushes all pending output if necessary, closes the compressed file
|
|
and deallocates all the (de)compression state. The return value is the zlib
|
|
error number (see function gzerror below).
|
|
*/
|
|
|
|
const char * gzerror OF((gzFile file, int *errnum));
|
|
/*
|
|
Returns the error message for the last error which occurred on the
|
|
given compressed file. errnum is set to zlib error number. If an
|
|
error occurred in the file system and not in the compression library,
|
|
errnum is set to Z_ERRNO and the application may consult errno
|
|
to get the exact error code.
|
|
*/
|
|
|
|
/* checksum functions */
|
|
|
|
/*
|
|
These functions are not related to compression but are exported
|
|
anyway because they might be useful in applications using the
|
|
compression library.
|
|
*/
|
|
|
|
uLong adler32 OF((uLong adler, const Byte *buf, uInt len));
|
|
|
|
/*
|
|
Update a running Adler-32 checksum with the bytes buf[0..len-1] and
|
|
return the updated checksum. If buf is NULL, this function returns
|
|
the required initial value for the checksum.
|
|
An Adler-32 checksum is almost as reliable as a CRC32 but can be computed
|
|
much faster. Usage example:
|
|
|
|
uLong adler = adler32(0L, Z_NULL, 0);
|
|
|
|
while (read_buffer(buffer, length) != EOF) {
|
|
adler = adler32(adler, buffer, length);
|
|
}
|
|
if (adler != original_adler) error();
|
|
*/
|
|
|
|
uLong crc32 OF((uLong crc, const Byte *buf, uInt len));
|
|
/*
|
|
Update a running crc with the bytes buf[0..len-1] and return the updated
|
|
crc. If buf is NULL, this function returns the required initial value
|
|
for the crc. Pre- and post-conditioning (one's complement) is performed
|
|
within this function so it shouldn't be done by the application.
|
|
Usage example:
|
|
|
|
uLong crc = crc32(0L, Z_NULL, 0);
|
|
|
|
while (read_buffer(buffer, length) != EOF) {
|
|
crc = crc32(crc, buffer, length);
|
|
}
|
|
if (crc != original_crc) error();
|
|
*/
|
|
|
|
|
|
/* various hacks, don't look :) */
|
|
|
|
/* deflateInit and inflateInit are macros to allow checking the zlib version
|
|
* and the compiler's view of z_stream:
|
|
*/
|
|
int deflateInit_ OF((z_streamp strm, int level,
|
|
const char *version, int stream_size));
|
|
int inflateInit_ OF((z_streamp strm,
|
|
const char *version, int stream_size));
|
|
int deflateInit2_ OF((z_streamp strm, int level, int method,
|
|
int windowBits, int memLevel,
|
|
int strategy, const char *version,
|
|
int stream_size));
|
|
int inflateInit2_ OF((z_streamp strm, int windowBits,
|
|
const char *version, int stream_size));
|
|
#define deflateInit(strm, level) \
|
|
deflateInit_((strm), (level), ZLIB_VERSION, sizeof(z_stream))
|
|
#define inflateInit(strm) \
|
|
inflateInit_((strm), ZLIB_VERSION, sizeof(z_stream))
|
|
#define deflateInit2(strm, level, method, windowBits, memLevel, strategy) \
|
|
deflateInit2_((strm),(level),(method),(windowBits),(memLevel),\
|
|
(strategy), ZLIB_VERSION, sizeof(z_stream))
|
|
#define inflateInit2(strm, windowBits) \
|
|
inflateInit2_((strm), (windowBits), ZLIB_VERSION, sizeof(z_stream))
|
|
|
|
|
|
const char * zError OF((int err));
|
|
int inflateSyncPoint OF((z_streamp z));
|
|
const uLong * get_crc_table OF((void));
|
|
|
|
typedef unsigned char uch;
|
|
typedef unsigned short ush;
|
|
typedef unsigned long ulg;
|
|
|
|
extern const char *z_errmsg[10]; /* indexed by 2-zlib_error */
|
|
/* (size given to avoid silly warnings with Visual C++) */
|
|
|
|
#define ERR_MSG(err) z_errmsg[Z_NEED_DICT-(err)]
|
|
|
|
#define ERR_RETURN(strm,err) \
|
|
return (strm->msg = (char*)ERR_MSG(err), (err))
|
|
/* To be used only when the state is known to be valid */
|
|
|
|
/* common constants */
|
|
|
|
#ifndef DEF_WBITS
|
|
# define DEF_WBITS MAX_WBITS
|
|
#endif
|
|
/* default windowBits for decompression. MAX_WBITS is for compression only */
|
|
|
|
#if MAX_MEM_LEVEL >= 8
|
|
# define DEF_MEM_LEVEL 8
|
|
#else
|
|
# define DEF_MEM_LEVEL MAX_MEM_LEVEL
|
|
#endif
|
|
/* default memLevel */
|
|
|
|
#define STORED_BLOCK 0
|
|
#define STATIC_TREES 1
|
|
#define DYN_TREES 2
|
|
/* The three kinds of block type */
|
|
|
|
#define MIN_MATCH 3
|
|
#define MAX_MATCH 258
|
|
/* The minimum and maximum match lengths */
|
|
|
|
#define PRESET_DICT 0x20 /* preset dictionary flag in zlib header */
|
|
|
|
/* target dependencies */
|
|
|
|
/* Common defaults */
|
|
|
|
#ifndef OS_CODE
|
|
# define OS_CODE 0x03 /* assume Unix */
|
|
#endif
|
|
|
|
#ifndef F_OPEN
|
|
# define F_OPEN(name, mode) fopen((name), (mode))
|
|
#endif
|
|
|
|
/* functions */
|
|
|
|
#ifdef HAVE_STRERROR
|
|
extern char *strerror OF((int));
|
|
# define zstrerror(errnum) strerror(errnum)
|
|
#else
|
|
# define zstrerror(errnum) ""
|
|
#endif
|
|
|
|
#define zmemcpy memcpy
|
|
#define zmemcmp memcmp
|
|
#define zmemzero(dest, len) memset(dest, 0, len)
|
|
|
|
/* Diagnostic functions */
|
|
#ifdef _ZIP_DEBUG_
|
|
int z_verbose = 0;
|
|
# define Assert(cond,msg) assert(cond);
|
|
//{if(!(cond)) Sys_Error(msg);}
|
|
# define Trace(x) {if (z_verbose>=0) Sys_Error x ;}
|
|
# define Tracev(x) {if (z_verbose>0) Sys_Error x ;}
|
|
# define Tracevv(x) {if (z_verbose>1) Sys_Error x ;}
|
|
# define Tracec(c,x) {if (z_verbose>0 && (c)) Sys_Error x ;}
|
|
# define Tracecv(c,x) {if (z_verbose>1 && (c)) Sys_Error x ;}
|
|
#else
|
|
# define Assert(cond,msg)
|
|
# define Trace(x)
|
|
# define Tracev(x)
|
|
# define Tracevv(x)
|
|
# define Tracec(c,x)
|
|
# define Tracecv(c,x)
|
|
#endif
|
|
|
|
|
|
typedef uLong (*check_func) OF((uLong check, const Byte *buf, uInt len));
|
|
voidp zcalloc OF((voidp opaque, unsigned items, unsigned size));
|
|
void zcfree OF((voidp opaque, voidp ptr));
|
|
|
|
#define ZALLOC(strm, items, size) \
|
|
(*((strm)->zalloc))((strm)->opaque, (items), (size))
|
|
#define ZFREE(strm, addr) (*((strm)->zfree))((strm)->opaque, (voidp)(addr))
|
|
#define TRY_FREE(s, p) {if (p) ZFREE(s, p);}
|
|
|
|
|
|
#if !defined(unix) && !defined(CASESENSITIVITYDEFAULT_YES) && \
|
|
!defined(CASESENSITIVITYDEFAULT_NO)
|
|
#define CASESENSITIVITYDEFAULT_NO
|
|
#endif
|
|
|
|
|
|
#ifndef UNZ_BUFSIZE
|
|
#define UNZ_BUFSIZE (65536)
|
|
#endif
|
|
|
|
#ifndef UNZ_MAXFILENAMEINZIP
|
|
#define UNZ_MAXFILENAMEINZIP (256)
|
|
#endif
|
|
|
|
#ifndef ALLOC
|
|
# define ALLOC(size) (Mem_Alloc(size))
|
|
#endif
|
|
#ifndef TRYFREE
|
|
# define TRYFREE(p) {if (p) Mem_Free(p);}
|
|
#endif
|
|
|
|
#define SIZECENTRALDIRITEM (0x2e)
|
|
#define SIZEZIPLOCALHEADER (0x1e)
|
|
|
|
|
|
|
|
/* ===========================================================================
|
|
Read a byte from a gz_stream; update next_in and avail_in. Return EOF
|
|
for end of file.
|
|
IN assertion: the stream s has been sucessfully opened for reading.
|
|
*/
|
|
|
|
/*
|
|
static int unzlocal_getByte(FILE *fin,int *pi)
|
|
{
|
|
unsigned char c;
|
|
int err = fread(&c, 1, 1, fin);
|
|
if (err==1)
|
|
{
|
|
*pi = (int)c;
|
|
return UNZ_OK;
|
|
}
|
|
else
|
|
{
|
|
if (ferror(fin))
|
|
return UNZ_ERRNO;
|
|
else
|
|
return UNZ_EOF;
|
|
}
|
|
}
|
|
*/
|
|
|
|
/* ===========================================================================
|
|
Reads a long in LSB order from the given gz_stream. Sets
|
|
*/
|
|
static int unzlocal_getShort (FILE* fin, uLong *pX)
|
|
{
|
|
short v;
|
|
|
|
if (fread( &v, sizeof(v), 1, fin ) != 1)
|
|
return UNZ_ERRNO;
|
|
|
|
*pX = LittleShort( v);
|
|
return UNZ_OK;
|
|
|
|
/*
|
|
uLong x ;
|
|
int i;
|
|
int err;
|
|
|
|
err = unzlocal_getByte(fin,&i);
|
|
x = (uLong)i;
|
|
|
|
if (err==UNZ_OK)
|
|
err = unzlocal_getByte(fin,&i);
|
|
x += ((uLong)i)<<8;
|
|
|
|
if (err==UNZ_OK)
|
|
*pX = x;
|
|
else
|
|
*pX = 0;
|
|
return err;
|
|
*/
|
|
}
|
|
|
|
static int unzlocal_getLong (FILE *fin, uLong *pX)
|
|
{
|
|
int v;
|
|
|
|
if (fread( &v, sizeof(v), 1, fin ) != 1)
|
|
return UNZ_ERRNO;
|
|
|
|
*pX = LittleInt( v);
|
|
return UNZ_OK;
|
|
|
|
/*
|
|
uLong x ;
|
|
int i;
|
|
int err;
|
|
|
|
err = unzlocal_getByte(fin,&i);
|
|
x = (uLong)i;
|
|
|
|
if (err==UNZ_OK)
|
|
err = unzlocal_getByte(fin,&i);
|
|
x += ((uLong)i)<<8;
|
|
|
|
if (err==UNZ_OK)
|
|
err = unzlocal_getByte(fin,&i);
|
|
x += ((uLong)i)<<16;
|
|
|
|
if (err==UNZ_OK)
|
|
err = unzlocal_getByte(fin,&i);
|
|
x += ((uLong)i)<<24;
|
|
|
|
if (err==UNZ_OK)
|
|
*pX = x;
|
|
else
|
|
*pX = 0;
|
|
return err;
|
|
*/
|
|
}
|
|
|
|
|
|
/* My own strcmpi / strcasecmp */
|
|
static int strcmpcasenosensitive_internal (const char* fileName1,const char* fileName2)
|
|
{
|
|
for (;;)
|
|
{
|
|
char c1=*(fileName1++);
|
|
char c2=*(fileName2++);
|
|
if ((c1>='a') && (c1<='z'))
|
|
c1 -= 0x20;
|
|
if ((c2>='a') && (c2<='z'))
|
|
c2 -= 0x20;
|
|
if (c1=='\0')
|
|
return ((c2=='\0') ? 0 : -1);
|
|
if (c2=='\0')
|
|
return 1;
|
|
if (c1<c2)
|
|
return -1;
|
|
if (c1>c2)
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
|
|
#ifdef CASESENSITIVITYDEFAULT_NO
|
|
#define CASESENSITIVITYDEFAULTVALUE 2
|
|
#else
|
|
#define CASESENSITIVITYDEFAULTVALUE 1
|
|
#endif
|
|
|
|
#ifndef STRCMPCASENOSENTIVEFUNCTION
|
|
#define STRCMPCASENOSENTIVEFUNCTION strcmpcasenosensitive_internal
|
|
#endif
|
|
|
|
/*
|
|
Compare two filename (fileName1,fileName2).
|
|
If iCaseSenisivity = 1, comparision is case sensitivity (like strcmp)
|
|
If iCaseSenisivity = 2, comparision is not case sensitivity (like strcmpi
|
|
or strcasecmp)
|
|
If iCaseSenisivity = 0, case sensitivity is defaut of your operating system
|
|
(like 1 on Unix, 2 on Windows)
|
|
|
|
*/
|
|
extern int unzStringFileNameCompare (const char* fileName1,const char* fileName2,int iCaseSensitivity)
|
|
{
|
|
if (iCaseSensitivity==0)
|
|
iCaseSensitivity=CASESENSITIVITYDEFAULTVALUE;
|
|
|
|
if (iCaseSensitivity==1)
|
|
return strcmp(fileName1,fileName2);
|
|
|
|
return STRCMPCASENOSENTIVEFUNCTION(fileName1,fileName2);
|
|
}
|
|
|
|
#define BUFREADCOMMENT (0x400)
|
|
|
|
/*
|
|
Locate the Central directory of a zipfile (at the end, just before
|
|
the global comment)
|
|
*/
|
|
static uLong unzlocal_SearchCentralDir(FILE *fin)
|
|
{
|
|
unsigned char* buf;
|
|
uLong uSizeFile;
|
|
uLong uBackRead;
|
|
uLong uMaxBack=0xffff; /* maximum size of global comment */
|
|
uLong uPosFound=0;
|
|
|
|
if (fseek(fin,0,SEEK_END) != 0)
|
|
return 0;
|
|
|
|
|
|
uSizeFile = ftell( fin );
|
|
|
|
if (uMaxBack>uSizeFile)
|
|
uMaxBack = uSizeFile;
|
|
|
|
buf = (unsigned char*)ALLOC(BUFREADCOMMENT+4);
|
|
if (buf==NULL)
|
|
return 0;
|
|
|
|
uBackRead = 4;
|
|
while (uBackRead<uMaxBack)
|
|
{
|
|
uLong uReadSize,uReadPos ;
|
|
int i;
|
|
if (uBackRead+BUFREADCOMMENT>uMaxBack)
|
|
uBackRead = uMaxBack;
|
|
else
|
|
uBackRead+=BUFREADCOMMENT;
|
|
uReadPos = uSizeFile-uBackRead ;
|
|
|
|
uReadSize = ((BUFREADCOMMENT+4) < (uSizeFile-uReadPos)) ?
|
|
(BUFREADCOMMENT+4) : (uSizeFile-uReadPos);
|
|
if (fseek(fin,uReadPos,SEEK_SET)!=0)
|
|
break;
|
|
|
|
if (fread(buf,(uInt)uReadSize,1,fin)!=1)
|
|
break;
|
|
|
|
for (i=(int)uReadSize-3; (i--)>0;)
|
|
if (((*(buf+i))==0x50) && ((*(buf+i+1))==0x4b) &&
|
|
((*(buf+i+2))==0x05) && ((*(buf+i+3))==0x06))
|
|
{
|
|
uPosFound = uReadPos+i;
|
|
break;
|
|
}
|
|
|
|
if (uPosFound!=0)
|
|
break;
|
|
}
|
|
TRYFREE(buf);
|
|
return uPosFound;
|
|
}
|
|
|
|
extern unzFile unzReOpen (const char* path, unzFile file)
|
|
{
|
|
unz_s *s;
|
|
FILE * fin;
|
|
|
|
fin=fopen(path,"rb");
|
|
if (fin==NULL)
|
|
return NULL;
|
|
|
|
s=(unz_s*)ALLOC(sizeof(unz_s));
|
|
memcpy(s, (unz_s*)file, sizeof(unz_s));
|
|
|
|
s->file = fin;
|
|
s->pfile_in_zip_read = NULL;
|
|
|
|
return (unzFile)s;
|
|
}
|
|
|
|
/*
|
|
Open a Zip file. path contain the full pathname (by example,
|
|
on a Windows NT computer "c:\\test\\zlib109.zip" or on an Unix computer
|
|
"zlib/zlib109.zip".
|
|
If the zipfile cannot be opened (file don't exist or in not valid), the
|
|
return value is NULL.
|
|
Else, the return value is a unzFile Handle, usable with other function
|
|
of this unzip package.
|
|
*/
|
|
extern unzFile unzOpen (const char* path)
|
|
{
|
|
unz_s us;
|
|
unz_s *s;
|
|
uLong central_pos,uL;
|
|
FILE * fin ;
|
|
|
|
uLong number_disk = 0; /* number of the current dist, used for
|
|
spaning ZIP, unsupported, always 0*/
|
|
uLong number_disk_with_CD = 0; /* number the the disk with central dir, used
|
|
for spaning ZIP, unsupported, always 0*/
|
|
uLong number_entry_CD = 0; /* total number of entries in
|
|
the central dir
|
|
(same than number_entry on nospan) */
|
|
|
|
int err=UNZ_OK;
|
|
|
|
fin=fopen(path,"rb");
|
|
if (fin==NULL)
|
|
return NULL;
|
|
|
|
central_pos = unzlocal_SearchCentralDir(fin);
|
|
if (central_pos==0)
|
|
err=UNZ_ERRNO;
|
|
|
|
if (fseek(fin,central_pos,SEEK_SET)!=0)
|
|
err=UNZ_ERRNO;
|
|
|
|
/* the signature, already checked */
|
|
if (unzlocal_getLong(fin,&uL)!=UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
/* number of this disk */
|
|
if (unzlocal_getShort(fin,&number_disk)!=UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
/* number of the disk with the start of the central directory */
|
|
if (unzlocal_getShort(fin,&number_disk_with_CD)!=UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
/* total number of entries in the central dir on this disk */
|
|
if (unzlocal_getShort(fin,&us.gi.number_entry)!=UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
/* total number of entries in the central dir */
|
|
if (unzlocal_getShort(fin,&number_entry_CD)!=UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
if ((number_entry_CD!=us.gi.number_entry) ||
|
|
(number_disk_with_CD!=0) ||
|
|
(number_disk!=0))
|
|
err=UNZ_BADZIPFILE;
|
|
|
|
/* size of the central directory */
|
|
if (unzlocal_getLong(fin,&us.size_central_dir)!=UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
/* offset of start of central directory with respect to the
|
|
starting disk number */
|
|
if (unzlocal_getLong(fin,&us.offset_central_dir)!=UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
/* zipfile comment length */
|
|
if (unzlocal_getShort(fin,&us.gi.size_comment)!=UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
if ((central_pos<us.offset_central_dir+us.size_central_dir) &&
|
|
(err==UNZ_OK))
|
|
err=UNZ_BADZIPFILE;
|
|
|
|
if (err!=UNZ_OK)
|
|
{
|
|
fclose(fin);
|
|
return NULL;
|
|
}
|
|
|
|
us.file=fin;
|
|
us.byte_before_the_zipfile = central_pos -
|
|
(us.offset_central_dir+us.size_central_dir);
|
|
us.central_pos = central_pos;
|
|
us.pfile_in_zip_read = NULL;
|
|
|
|
|
|
s=(unz_s*)ALLOC(sizeof(unz_s));
|
|
*s=us;
|
|
// unzGoToFirstFile((unzFile)s);
|
|
return (unzFile)s;
|
|
}
|
|
|
|
|
|
/*
|
|
Close a ZipFile opened with unzipOpen.
|
|
If there is files inside the .Zip opened with unzipOpenCurrentFile (see later),
|
|
these files MUST be closed with unzipCloseCurrentFile before call unzipClose.
|
|
return UNZ_OK if there is no problem. */
|
|
extern int unzClose (unzFile file)
|
|
{
|
|
unz_s* s;
|
|
if (file==NULL)
|
|
return UNZ_PARAMERROR;
|
|
s=(unz_s*)file;
|
|
|
|
if (s->pfile_in_zip_read!=NULL)
|
|
unzCloseCurrentFile(file);
|
|
|
|
fclose(s->file);
|
|
TRYFREE(s);
|
|
return UNZ_OK;
|
|
}
|
|
|
|
|
|
/*
|
|
Write info about the ZipFile in the *pglobal_info structure.
|
|
No preparation of the structure is needed
|
|
return UNZ_OK if there is no problem. */
|
|
extern int unzGetGlobalInfo (unzFile file,unz_global_info *pglobal_info)
|
|
{
|
|
unz_s* s;
|
|
if (file==NULL)
|
|
return UNZ_PARAMERROR;
|
|
s=(unz_s*)file;
|
|
*pglobal_info=s->gi;
|
|
return UNZ_OK;
|
|
}
|
|
|
|
|
|
/*
|
|
Translate date/time from Dos format to tm_unz (readable more easilty)
|
|
*/
|
|
static void unzlocal_DosDateToTmuDate (uLong ulDosDate, tm_unz* ptm)
|
|
{
|
|
uLong uDate;
|
|
uDate = (uLong)(ulDosDate>>16);
|
|
ptm->tm_mday = (uInt)(uDate&0x1f) ;
|
|
ptm->tm_mon = (uInt)((((uDate)&0x1E0)/0x20)-1) ;
|
|
ptm->tm_year = (uInt)(((uDate&0x0FE00)/0x0200)+1980) ;
|
|
|
|
ptm->tm_hour = (uInt) ((ulDosDate &0xF800)/0x800);
|
|
ptm->tm_min = (uInt) ((ulDosDate&0x7E0)/0x20) ;
|
|
ptm->tm_sec = (uInt) (2*(ulDosDate&0x1f)) ;
|
|
}
|
|
|
|
/*
|
|
Get Info about the current file in the zipfile, with internal only info
|
|
*/
|
|
static int unzlocal_GetCurrentFileInfoInternal (unzFile file,
|
|
unz_file_info *pfile_info,
|
|
unz_file_info_internal
|
|
*pfile_info_internal,
|
|
char *szFileName,
|
|
uLong fileNameBufferSize,
|
|
void *extraField,
|
|
uLong extraFieldBufferSize,
|
|
char *szComment,
|
|
uLong commentBufferSize)
|
|
{
|
|
unz_s* s;
|
|
unz_file_info file_info;
|
|
unz_file_info_internal file_info_internal;
|
|
int err=UNZ_OK;
|
|
uLong uMagic;
|
|
long lSeek=0;
|
|
|
|
if (file==NULL)
|
|
return UNZ_PARAMERROR;
|
|
s=(unz_s*)file;
|
|
if (fseek(s->file,s->pos_in_central_dir+s->byte_before_the_zipfile,SEEK_SET)!=0)
|
|
err=UNZ_ERRNO;
|
|
|
|
|
|
/* we check the magic */
|
|
if (err==UNZ_OK) {
|
|
if (unzlocal_getLong(s->file,&uMagic) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
else if (uMagic!=0x02014b50)
|
|
err=UNZ_BADZIPFILE;
|
|
}
|
|
|
|
if (unzlocal_getShort(s->file,&file_info.version) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
if (unzlocal_getShort(s->file,&file_info.version_needed) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
if (unzlocal_getShort(s->file,&file_info.flag) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
if (unzlocal_getShort(s->file,&file_info.compression_method) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
if (unzlocal_getLong(s->file,&file_info.dosDate) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
unzlocal_DosDateToTmuDate(file_info.dosDate,&file_info.tmu_date);
|
|
|
|
if (unzlocal_getLong(s->file,&file_info.crc) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
if (unzlocal_getLong(s->file,&file_info.compressed_size) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
if (unzlocal_getLong(s->file,&file_info.uncompressed_size) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
if (unzlocal_getShort(s->file,&file_info.size_filename) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
if (unzlocal_getShort(s->file,&file_info.size_file_extra) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
if (unzlocal_getShort(s->file,&file_info.size_file_comment) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
if (unzlocal_getShort(s->file,&file_info.disk_num_start) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
if (unzlocal_getShort(s->file,&file_info.internal_fa) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
if (unzlocal_getLong(s->file,&file_info.external_fa) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
if (unzlocal_getLong(s->file,&file_info_internal.offset_curfile) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
lSeek+=file_info.size_filename;
|
|
if ((err==UNZ_OK) && (szFileName!=NULL))
|
|
{
|
|
uLong uSizeRead ;
|
|
if (file_info.size_filename<fileNameBufferSize)
|
|
{
|
|
*(szFileName+file_info.size_filename)='\0';
|
|
uSizeRead = file_info.size_filename;
|
|
}
|
|
else
|
|
uSizeRead = fileNameBufferSize;
|
|
|
|
if ((file_info.size_filename>0) && (fileNameBufferSize>0))
|
|
if (fread(szFileName,(uInt)uSizeRead,1,s->file)!=1)
|
|
err=UNZ_ERRNO;
|
|
lSeek -= uSizeRead;
|
|
}
|
|
|
|
|
|
if ((err==UNZ_OK) && (extraField!=NULL))
|
|
{
|
|
uLong uSizeRead ;
|
|
if (file_info.size_file_extra<extraFieldBufferSize)
|
|
uSizeRead = file_info.size_file_extra;
|
|
else
|
|
uSizeRead = extraFieldBufferSize;
|
|
|
|
if (lSeek!=0) {
|
|
if (fseek(s->file,lSeek,SEEK_CUR)==0)
|
|
lSeek=0;
|
|
else
|
|
err=UNZ_ERRNO;
|
|
}
|
|
if ((file_info.size_file_extra>0) && (extraFieldBufferSize>0))
|
|
if (fread(extraField,(uInt)uSizeRead,1,s->file)!=1)
|
|
err=UNZ_ERRNO;
|
|
lSeek += file_info.size_file_extra - uSizeRead;
|
|
}
|
|
else
|
|
lSeek+=file_info.size_file_extra;
|
|
|
|
|
|
if ((err==UNZ_OK) && (szComment!=NULL))
|
|
{
|
|
uLong uSizeRead ;
|
|
if (file_info.size_file_comment<commentBufferSize)
|
|
{
|
|
*(szComment+file_info.size_file_comment)='\0';
|
|
uSizeRead = file_info.size_file_comment;
|
|
}
|
|
else
|
|
uSizeRead = commentBufferSize;
|
|
|
|
if (lSeek!=0) {
|
|
if (fseek(s->file,lSeek,SEEK_CUR)==0)
|
|
lSeek=0;
|
|
else
|
|
err=UNZ_ERRNO;
|
|
}
|
|
if ((file_info.size_file_comment>0) && (commentBufferSize>0))
|
|
if (fread(szComment,(uInt)uSizeRead,1,s->file)!=1)
|
|
err=UNZ_ERRNO;
|
|
lSeek+=file_info.size_file_comment - uSizeRead;
|
|
}
|
|
else
|
|
lSeek+=file_info.size_file_comment;
|
|
|
|
if ((err==UNZ_OK) && (pfile_info!=NULL))
|
|
*pfile_info=file_info;
|
|
|
|
if ((err==UNZ_OK) && (pfile_info_internal!=NULL))
|
|
*pfile_info_internal=file_info_internal;
|
|
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
Write info about the ZipFile in the *pglobal_info structure.
|
|
No preparation of the structure is needed
|
|
return UNZ_OK if there is no problem.
|
|
*/
|
|
extern int unzGetCurrentFileInfo ( unzFile file, unz_file_info *pfile_info,
|
|
char *szFileName, uLong fileNameBufferSize,
|
|
void *extraField, uLong extraFieldBufferSize,
|
|
char *szComment, uLong commentBufferSize)
|
|
{
|
|
return unzlocal_GetCurrentFileInfoInternal(file,pfile_info,NULL,
|
|
szFileName,fileNameBufferSize,
|
|
extraField,extraFieldBufferSize,
|
|
szComment,commentBufferSize);
|
|
}
|
|
|
|
/*
|
|
Set the current file of the zipfile to the first file.
|
|
return UNZ_OK if there is no problem
|
|
*/
|
|
extern int unzGoToFirstFile (unzFile file)
|
|
{
|
|
int err=UNZ_OK;
|
|
unz_s* s;
|
|
if (file==NULL)
|
|
return UNZ_PARAMERROR;
|
|
s=(unz_s*)file;
|
|
s->pos_in_central_dir=s->offset_central_dir;
|
|
s->num_file=0;
|
|
err=unzlocal_GetCurrentFileInfoInternal(file,&s->cur_file_info,
|
|
&s->cur_file_info_internal,
|
|
NULL,0,NULL,0,NULL,0);
|
|
s->current_file_ok = (err == UNZ_OK);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
Set the current file of the zipfile to the next file.
|
|
return UNZ_OK if there is no problem
|
|
return UNZ_END_OF_LIST_OF_FILE if the actual file was the latest.
|
|
*/
|
|
extern int unzGoToNextFile (unzFile file)
|
|
{
|
|
unz_s* s;
|
|
int err;
|
|
|
|
if (file==NULL)
|
|
return UNZ_PARAMERROR;
|
|
s=(unz_s*)file;
|
|
if (!s->current_file_ok)
|
|
return UNZ_END_OF_LIST_OF_FILE;
|
|
if (s->num_file+1==s->gi.number_entry)
|
|
return UNZ_END_OF_LIST_OF_FILE;
|
|
|
|
s->pos_in_central_dir += SIZECENTRALDIRITEM + s->cur_file_info.size_filename +
|
|
s->cur_file_info.size_file_extra + s->cur_file_info.size_file_comment ;
|
|
s->num_file++;
|
|
err = unzlocal_GetCurrentFileInfoInternal(file,&s->cur_file_info,
|
|
&s->cur_file_info_internal,
|
|
NULL,0,NULL,0,NULL,0);
|
|
s->current_file_ok = (err == UNZ_OK);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
Get the position of the info of the current file in the zip.
|
|
return UNZ_OK if there is no problem
|
|
*/
|
|
extern int unzGetCurrentFileInfoPosition (unzFile file, unsigned long *pos )
|
|
{
|
|
unz_s* s;
|
|
|
|
if (file==NULL)
|
|
return UNZ_PARAMERROR;
|
|
s=(unz_s*)file;
|
|
|
|
*pos = s->pos_in_central_dir;
|
|
return UNZ_OK;
|
|
}
|
|
|
|
/*
|
|
Set the position of the info of the current file in the zip.
|
|
return UNZ_OK if there is no problem
|
|
*/
|
|
extern int unzSetCurrentFileInfoPosition (unzFile file, unsigned long pos )
|
|
{
|
|
unz_s* s;
|
|
int err;
|
|
|
|
if (file==NULL)
|
|
return UNZ_PARAMERROR;
|
|
s=(unz_s*)file;
|
|
|
|
s->pos_in_central_dir = pos;
|
|
err = unzlocal_GetCurrentFileInfoInternal(file,&s->cur_file_info,
|
|
&s->cur_file_info_internal,
|
|
NULL,0,NULL,0,NULL,0);
|
|
s->current_file_ok = (err == UNZ_OK);
|
|
return UNZ_OK;
|
|
}
|
|
|
|
/*
|
|
Try locate the file szFileName in the zipfile.
|
|
For the iCaseSensitivity signification, see unzipStringFileNameCompare
|
|
|
|
return value :
|
|
UNZ_OK if the file is found. It becomes the current file.
|
|
UNZ_END_OF_LIST_OF_FILE if the file is not found
|
|
*/
|
|
extern int unzLocateFile (unzFile file, const char *szFileName, int iCaseSensitivity)
|
|
{
|
|
unz_s* s;
|
|
int err;
|
|
|
|
|
|
uLong num_fileSaved;
|
|
uLong pos_in_central_dirSaved;
|
|
|
|
|
|
if (file==NULL)
|
|
return UNZ_PARAMERROR;
|
|
|
|
if (strlen(szFileName)>=UNZ_MAXFILENAMEINZIP)
|
|
return UNZ_PARAMERROR;
|
|
|
|
s=(unz_s*)file;
|
|
if (!s->current_file_ok)
|
|
return UNZ_END_OF_LIST_OF_FILE;
|
|
|
|
num_fileSaved = s->num_file;
|
|
pos_in_central_dirSaved = s->pos_in_central_dir;
|
|
|
|
err = unzGoToFirstFile(file);
|
|
|
|
while (err == UNZ_OK)
|
|
{
|
|
char szCurrentFileName[UNZ_MAXFILENAMEINZIP+1];
|
|
unzGetCurrentFileInfo(file,NULL,
|
|
szCurrentFileName,sizeof(szCurrentFileName)-1,
|
|
NULL,0,NULL,0);
|
|
if (unzStringFileNameCompare(szCurrentFileName,
|
|
szFileName,iCaseSensitivity)==0)
|
|
return UNZ_OK;
|
|
err = unzGoToNextFile(file);
|
|
}
|
|
|
|
s->num_file = num_fileSaved ;
|
|
s->pos_in_central_dir = pos_in_central_dirSaved ;
|
|
return err;
|
|
}
|
|
|
|
|
|
/*
|
|
Read the static header of the current zipfile
|
|
Check the coherency of the static header and info in the end of central
|
|
directory about this file
|
|
store in *piSizeVar the size of extra info in static header
|
|
(filename and size of extra field data)
|
|
*/
|
|
static int unzlocal_CheckCurrentFileCoherencyHeader (unz_s* s, uInt* piSizeVar,
|
|
uLong *poffset_local_extrafield,
|
|
uInt *psize_local_extrafield)
|
|
{
|
|
uLong uMagic,uData,uFlags = 0;
|
|
uLong size_filename;
|
|
uLong size_extra_field;
|
|
int err=UNZ_OK;
|
|
|
|
*piSizeVar = 0;
|
|
*poffset_local_extrafield = 0;
|
|
*psize_local_extrafield = 0;
|
|
|
|
if (fseek(s->file,s->cur_file_info_internal.offset_curfile +
|
|
s->byte_before_the_zipfile,SEEK_SET)!=0)
|
|
return UNZ_ERRNO;
|
|
|
|
|
|
if (err==UNZ_OK) {
|
|
if (unzlocal_getLong(s->file,&uMagic) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
else if (uMagic!=0x04034b50)
|
|
err=UNZ_BADZIPFILE;
|
|
}
|
|
|
|
if (unzlocal_getShort(s->file,&uData) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
/*
|
|
else if ((err==UNZ_OK) && (uData!=s->cur_file_info.wVersion))
|
|
err=UNZ_BADZIPFILE;
|
|
*/
|
|
if (unzlocal_getShort(s->file,&uFlags) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
|
|
if (unzlocal_getShort(s->file,&uData) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
else if ((err==UNZ_OK) && (uData!=s->cur_file_info.compression_method))
|
|
err=UNZ_BADZIPFILE;
|
|
|
|
if ((err==UNZ_OK) && (s->cur_file_info.compression_method!=0) &&
|
|
(s->cur_file_info.compression_method!=Z_DEFLATED))
|
|
err=UNZ_BADZIPFILE;
|
|
|
|
if (unzlocal_getLong(s->file,&uData) != UNZ_OK) /* date/time */
|
|
err=UNZ_ERRNO;
|
|
|
|
if (unzlocal_getLong(s->file,&uData) != UNZ_OK) /* crc */
|
|
err=UNZ_ERRNO;
|
|
else if ((err==UNZ_OK) && (uData!=s->cur_file_info.crc) &&
|
|
((uFlags & 8)==0))
|
|
err=UNZ_BADZIPFILE;
|
|
|
|
if (unzlocal_getLong(s->file,&uData) != UNZ_OK) /* size compr */
|
|
err=UNZ_ERRNO;
|
|
else if ((err==UNZ_OK) && (uData!=s->cur_file_info.compressed_size) &&
|
|
((uFlags & 8)==0))
|
|
err=UNZ_BADZIPFILE;
|
|
|
|
if (unzlocal_getLong(s->file,&uData) != UNZ_OK) /* size uncompr */
|
|
err=UNZ_ERRNO;
|
|
else if ((err==UNZ_OK) && (uData!=s->cur_file_info.uncompressed_size) &&
|
|
((uFlags & 8)==0))
|
|
err=UNZ_BADZIPFILE;
|
|
|
|
|
|
if (unzlocal_getShort(s->file,&size_filename) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
else if ((err==UNZ_OK) && (size_filename!=s->cur_file_info.size_filename))
|
|
err=UNZ_BADZIPFILE;
|
|
|
|
*piSizeVar += (uInt)size_filename;
|
|
|
|
if (unzlocal_getShort(s->file,&size_extra_field) != UNZ_OK)
|
|
err=UNZ_ERRNO;
|
|
*poffset_local_extrafield= s->cur_file_info_internal.offset_curfile +
|
|
SIZEZIPLOCALHEADER + size_filename;
|
|
*psize_local_extrafield = (uInt)size_extra_field;
|
|
|
|
*piSizeVar += (uInt)size_extra_field;
|
|
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
Open for reading data the current file in the zipfile.
|
|
If there is no error and the file is opened, the return value is UNZ_OK.
|
|
*/
|
|
extern int unzOpenCurrentFile (unzFile file)
|
|
{
|
|
int err=UNZ_OK;
|
|
int Store;
|
|
uInt iSizeVar;
|
|
unz_s* s;
|
|
file_in_zip_read_info_s* pfile_in_zip_read_info;
|
|
uLong offset_local_extrafield; /* offset of the static extra field */
|
|
uInt size_local_extrafield; /* size of the static extra field */
|
|
|
|
if (file==NULL)
|
|
return UNZ_PARAMERROR;
|
|
s=(unz_s*)file;
|
|
if (!s->current_file_ok)
|
|
return UNZ_PARAMERROR;
|
|
|
|
if (s->pfile_in_zip_read != NULL)
|
|
unzCloseCurrentFile(file);
|
|
|
|
if (unzlocal_CheckCurrentFileCoherencyHeader(s,&iSizeVar,
|
|
&offset_local_extrafield,&size_local_extrafield)!=UNZ_OK)
|
|
return UNZ_BADZIPFILE;
|
|
|
|
pfile_in_zip_read_info = (file_in_zip_read_info_s*)
|
|
ALLOC(sizeof(file_in_zip_read_info_s));
|
|
if (pfile_in_zip_read_info==NULL)
|
|
return UNZ_INTERNALERROR;
|
|
|
|
pfile_in_zip_read_info->read_buffer=(char*)ALLOC(UNZ_BUFSIZE);
|
|
pfile_in_zip_read_info->offset_local_extrafield = offset_local_extrafield;
|
|
pfile_in_zip_read_info->size_local_extrafield = size_local_extrafield;
|
|
pfile_in_zip_read_info->pos_local_extrafield=0;
|
|
|
|
if (pfile_in_zip_read_info->read_buffer==NULL)
|
|
{
|
|
TRYFREE(pfile_in_zip_read_info);
|
|
return UNZ_INTERNALERROR;
|
|
}
|
|
|
|
pfile_in_zip_read_info->stream_initialised=0;
|
|
|
|
if ((s->cur_file_info.compression_method!=0) &&
|
|
(s->cur_file_info.compression_method!=Z_DEFLATED))
|
|
err=UNZ_BADZIPFILE;
|
|
Store = s->cur_file_info.compression_method==0;
|
|
|
|
pfile_in_zip_read_info->crc32_wait=s->cur_file_info.crc;
|
|
pfile_in_zip_read_info->crc32=0;
|
|
pfile_in_zip_read_info->compression_method =
|
|
s->cur_file_info.compression_method;
|
|
pfile_in_zip_read_info->file=s->file;
|
|
pfile_in_zip_read_info->byte_before_the_zipfile=s->byte_before_the_zipfile;
|
|
|
|
pfile_in_zip_read_info->stream.total_out = 0;
|
|
|
|
if (!Store)
|
|
{
|
|
pfile_in_zip_read_info->stream.zalloc = (alloc_func)0;
|
|
pfile_in_zip_read_info->stream.zfree = (free_func)0;
|
|
pfile_in_zip_read_info->stream.opaque = (voidp)0;
|
|
|
|
err=inflateInit2(&pfile_in_zip_read_info->stream, -MAX_WBITS);
|
|
if (err == Z_OK)
|
|
pfile_in_zip_read_info->stream_initialised=1;
|
|
/* windowBits is passed < 0 to tell that there is no zlib header.
|
|
* Note that in this case inflate *requires* an extra "dummy" byte
|
|
* after the compressed stream in order to complete decompression and
|
|
* return Z_STREAM_END.
|
|
* In unzip, i don't wait absolutely Z_STREAM_END because I known the
|
|
* size of both compressed and uncompressed data
|
|
*/
|
|
}
|
|
pfile_in_zip_read_info->rest_read_compressed =
|
|
s->cur_file_info.compressed_size ;
|
|
pfile_in_zip_read_info->rest_read_uncompressed =
|
|
s->cur_file_info.uncompressed_size ;
|
|
|
|
|
|
pfile_in_zip_read_info->pos_in_zipfile =
|
|
s->cur_file_info_internal.offset_curfile + SIZEZIPLOCALHEADER +
|
|
iSizeVar;
|
|
|
|
pfile_in_zip_read_info->stream.avail_in = (uInt)0;
|
|
|
|
|
|
s->pfile_in_zip_read = pfile_in_zip_read_info;
|
|
return UNZ_OK;
|
|
}
|
|
|
|
|
|
/*
|
|
Read bytes from the current file.
|
|
buf contain buffer where data must be copied
|
|
len the size of buf.
|
|
|
|
return the number of byte copied if somes bytes are copied
|
|
return 0 if the end of file was reached
|
|
return <0 with error code if there is an error
|
|
(UNZ_ERRNO for IO error, or zLib error for uncompress error)
|
|
*/
|
|
extern int unzReadCurrentFile (unzFile file, void *buf, unsigned len)
|
|
{
|
|
int err=UNZ_OK;
|
|
uInt iRead = 0;
|
|
unz_s* s;
|
|
file_in_zip_read_info_s* pfile_in_zip_read_info;
|
|
if (file==NULL)
|
|
return UNZ_PARAMERROR;
|
|
s=(unz_s*)file;
|
|
pfile_in_zip_read_info=s->pfile_in_zip_read;
|
|
|
|
if (pfile_in_zip_read_info==NULL)
|
|
return UNZ_PARAMERROR;
|
|
|
|
|
|
if (pfile_in_zip_read_info->read_buffer == NULL)
|
|
return UNZ_END_OF_LIST_OF_FILE;
|
|
if (len==0)
|
|
return 0;
|
|
|
|
pfile_in_zip_read_info->stream.next_out = (Byte*)buf;
|
|
|
|
pfile_in_zip_read_info->stream.avail_out = (uInt)len;
|
|
|
|
if (len>pfile_in_zip_read_info->rest_read_uncompressed)
|
|
pfile_in_zip_read_info->stream.avail_out =
|
|
(uInt)pfile_in_zip_read_info->rest_read_uncompressed;
|
|
|
|
while (pfile_in_zip_read_info->stream.avail_out>0)
|
|
{
|
|
if ((pfile_in_zip_read_info->stream.avail_in==0) &&
|
|
(pfile_in_zip_read_info->rest_read_compressed>0))
|
|
{
|
|
uInt uReadThis = UNZ_BUFSIZE;
|
|
if (pfile_in_zip_read_info->rest_read_compressed<uReadThis)
|
|
uReadThis = (uInt)pfile_in_zip_read_info->rest_read_compressed;
|
|
if (uReadThis == 0)
|
|
return UNZ_EOF;
|
|
if (s->cur_file_info.compressed_size == pfile_in_zip_read_info->rest_read_compressed)
|
|
if (fseek(pfile_in_zip_read_info->file,
|
|
pfile_in_zip_read_info->pos_in_zipfile +
|
|
pfile_in_zip_read_info->byte_before_the_zipfile,SEEK_SET)!=0)
|
|
return UNZ_ERRNO;
|
|
if (fread(pfile_in_zip_read_info->read_buffer,uReadThis,1,
|
|
pfile_in_zip_read_info->file)!=1)
|
|
return UNZ_ERRNO;
|
|
pfile_in_zip_read_info->pos_in_zipfile += uReadThis;
|
|
|
|
pfile_in_zip_read_info->rest_read_compressed-=uReadThis;
|
|
|
|
pfile_in_zip_read_info->stream.next_in =
|
|
(Byte*)pfile_in_zip_read_info->read_buffer;
|
|
pfile_in_zip_read_info->stream.avail_in = (uInt)uReadThis;
|
|
}
|
|
|
|
if (pfile_in_zip_read_info->compression_method==0)
|
|
{
|
|
uInt uDoCopy,i ;
|
|
if (pfile_in_zip_read_info->stream.avail_out <
|
|
pfile_in_zip_read_info->stream.avail_in)
|
|
uDoCopy = pfile_in_zip_read_info->stream.avail_out ;
|
|
else
|
|
uDoCopy = pfile_in_zip_read_info->stream.avail_in ;
|
|
|
|
for (i=0;i<uDoCopy;i++)
|
|
*(pfile_in_zip_read_info->stream.next_out+i) =
|
|
*(pfile_in_zip_read_info->stream.next_in+i);
|
|
|
|
pfile_in_zip_read_info->crc32 = crc32(pfile_in_zip_read_info->crc32,
|
|
pfile_in_zip_read_info->stream.next_out,
|
|
uDoCopy);
|
|
pfile_in_zip_read_info->rest_read_uncompressed-=uDoCopy;
|
|
pfile_in_zip_read_info->stream.avail_in -= uDoCopy;
|
|
pfile_in_zip_read_info->stream.avail_out -= uDoCopy;
|
|
pfile_in_zip_read_info->stream.next_out += uDoCopy;
|
|
pfile_in_zip_read_info->stream.next_in += uDoCopy;
|
|
pfile_in_zip_read_info->stream.total_out += uDoCopy;
|
|
iRead += uDoCopy;
|
|
}
|
|
else
|
|
{
|
|
uLong uTotalOutBefore,uTotalOutAfter;
|
|
const Byte *bufBefore;
|
|
uLong uOutThis;
|
|
int flush=Z_SYNC_FLUSH;
|
|
|
|
uTotalOutBefore = pfile_in_zip_read_info->stream.total_out;
|
|
bufBefore = pfile_in_zip_read_info->stream.next_out;
|
|
|
|
/*
|
|
if ((pfile_in_zip_read_info->rest_read_uncompressed ==
|
|
pfile_in_zip_read_info->stream.avail_out) &&
|
|
(pfile_in_zip_read_info->rest_read_compressed == 0))
|
|
flush = Z_FINISH;
|
|
*/
|
|
err=inflate(&pfile_in_zip_read_info->stream,flush);
|
|
|
|
uTotalOutAfter = pfile_in_zip_read_info->stream.total_out;
|
|
uOutThis = uTotalOutAfter-uTotalOutBefore;
|
|
|
|
pfile_in_zip_read_info->crc32 =
|
|
crc32(pfile_in_zip_read_info->crc32,bufBefore,
|
|
(uInt)(uOutThis));
|
|
|
|
pfile_in_zip_read_info->rest_read_uncompressed -=
|
|
uOutThis;
|
|
|
|
iRead += (uInt)(uTotalOutAfter - uTotalOutBefore);
|
|
|
|
if (err==Z_STREAM_END)
|
|
return (iRead==0) ? UNZ_EOF : iRead;
|
|
if (err!=Z_OK)
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (err==Z_OK)
|
|
return iRead;
|
|
return err;
|
|
}
|
|
|
|
|
|
/*
|
|
Give the current position in uncompressed data
|
|
*/
|
|
extern long unztell (unzFile file)
|
|
{
|
|
unz_s* s;
|
|
file_in_zip_read_info_s* pfile_in_zip_read_info;
|
|
if (file==NULL)
|
|
return UNZ_PARAMERROR;
|
|
s=(unz_s*)file;
|
|
pfile_in_zip_read_info=s->pfile_in_zip_read;
|
|
|
|
if (pfile_in_zip_read_info==NULL)
|
|
return UNZ_PARAMERROR;
|
|
|
|
return (long)pfile_in_zip_read_info->stream.total_out;
|
|
}
|
|
|
|
|
|
/*
|
|
return 1 if the end of file was reached, 0 elsewhere
|
|
*/
|
|
extern int unzeof (unzFile file)
|
|
{
|
|
unz_s* s;
|
|
file_in_zip_read_info_s* pfile_in_zip_read_info;
|
|
if (file==NULL)
|
|
return UNZ_PARAMERROR;
|
|
s=(unz_s*)file;
|
|
pfile_in_zip_read_info=s->pfile_in_zip_read;
|
|
|
|
if (pfile_in_zip_read_info==NULL)
|
|
return UNZ_PARAMERROR;
|
|
|
|
if (pfile_in_zip_read_info->rest_read_uncompressed == 0)
|
|
return 1;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
Read extra field from the current file (opened by unzOpenCurrentFile)
|
|
This is the static-header version of the extra field (sometimes, there is
|
|
more info in the static-header version than in the central-header)
|
|
|
|
if buf==NULL, it return the size of the static extra field that can be read
|
|
|
|
if buf!=NULL, len is the size of the buffer, the extra header is copied in
|
|
buf.
|
|
the return value is the number of bytes copied in buf, or (if <0)
|
|
the error code
|
|
*/
|
|
extern int unzGetLocalExtrafield (unzFile file,void *buf,unsigned len)
|
|
{
|
|
unz_s* s;
|
|
file_in_zip_read_info_s* pfile_in_zip_read_info;
|
|
uInt read_now;
|
|
uLong size_to_read;
|
|
|
|
if (file==NULL)
|
|
return UNZ_PARAMERROR;
|
|
s=(unz_s*)file;
|
|
pfile_in_zip_read_info=s->pfile_in_zip_read;
|
|
|
|
if (pfile_in_zip_read_info==NULL)
|
|
return UNZ_PARAMERROR;
|
|
|
|
size_to_read = (pfile_in_zip_read_info->size_local_extrafield -
|
|
pfile_in_zip_read_info->pos_local_extrafield);
|
|
|
|
if (buf==NULL)
|
|
return (int)size_to_read;
|
|
|
|
if (len>size_to_read)
|
|
read_now = (uInt)size_to_read;
|
|
else
|
|
read_now = (uInt)len ;
|
|
|
|
if (read_now==0)
|
|
return 0;
|
|
|
|
if (fseek(pfile_in_zip_read_info->file,
|
|
pfile_in_zip_read_info->offset_local_extrafield +
|
|
pfile_in_zip_read_info->pos_local_extrafield,SEEK_SET)!=0)
|
|
return UNZ_ERRNO;
|
|
|
|
if (fread(buf,(uInt)size_to_read,1,pfile_in_zip_read_info->file)!=1)
|
|
return UNZ_ERRNO;
|
|
|
|
return (int)read_now;
|
|
}
|
|
|
|
/*
|
|
Close the file in zip opened with unzipOpenCurrentFile
|
|
Return UNZ_CRCERROR if all the file was read but the CRC is not good
|
|
*/
|
|
extern int unzCloseCurrentFile (unzFile file)
|
|
{
|
|
int err=UNZ_OK;
|
|
|
|
unz_s* s;
|
|
file_in_zip_read_info_s* pfile_in_zip_read_info;
|
|
if (file==NULL)
|
|
return UNZ_PARAMERROR;
|
|
s=(unz_s*)file;
|
|
pfile_in_zip_read_info=s->pfile_in_zip_read;
|
|
|
|
if (pfile_in_zip_read_info==NULL)
|
|
return UNZ_PARAMERROR;
|
|
|
|
|
|
if (pfile_in_zip_read_info->rest_read_uncompressed == 0)
|
|
{
|
|
if (pfile_in_zip_read_info->crc32 != pfile_in_zip_read_info->crc32_wait)
|
|
err=UNZ_CRCERROR;
|
|
}
|
|
|
|
|
|
TRYFREE(pfile_in_zip_read_info->read_buffer);
|
|
pfile_in_zip_read_info->read_buffer = NULL;
|
|
if (pfile_in_zip_read_info->stream_initialised)
|
|
inflateEnd(&pfile_in_zip_read_info->stream);
|
|
|
|
pfile_in_zip_read_info->stream_initialised = 0;
|
|
TRYFREE(pfile_in_zip_read_info);
|
|
|
|
s->pfile_in_zip_read=NULL;
|
|
|
|
return err;
|
|
}
|
|
|
|
|
|
/*
|
|
Get the global comment string of the ZipFile, in the szComment buffer.
|
|
uSizeBuf is the size of the szComment buffer.
|
|
return the number of byte copied or an error code <0
|
|
*/
|
|
extern int unzGetGlobalComment (unzFile file, char *szComment, uLong uSizeBuf)
|
|
{
|
|
unz_s* s;
|
|
uLong uReadThis ;
|
|
if (file==NULL)
|
|
return UNZ_PARAMERROR;
|
|
s=(unz_s*)file;
|
|
|
|
uReadThis = uSizeBuf;
|
|
if (uReadThis>s->gi.size_comment)
|
|
uReadThis = s->gi.size_comment;
|
|
|
|
if (fseek(s->file,s->central_pos+22,SEEK_SET)!=0)
|
|
return UNZ_ERRNO;
|
|
|
|
if (uReadThis>0)
|
|
{
|
|
*szComment='\0';
|
|
if (fread(szComment,(uInt)uReadThis,1,s->file)!=1)
|
|
return UNZ_ERRNO;
|
|
}
|
|
|
|
if ((szComment != NULL) && (uSizeBuf > s->gi.size_comment))
|
|
*(szComment+s->gi.size_comment)='\0';
|
|
return (int)uReadThis;
|
|
}
|
|
|
|
/* crc32.c -- compute the CRC-32 of a data stream
|
|
* Copyright (C) 1995-1998 Mark Adler
|
|
* For conditions of distribution and use, see copyright notice in zlib.h
|
|
*/
|
|
|
|
/* @(#) $Id: unzip.c,v 1.2 1999/09/07 20:51:25 zoid Exp $ */
|
|
|
|
#ifdef DYNAMIC_CRC_TABLE
|
|
|
|
static int crc_table_empty = 1;
|
|
static uLong crc_table[256];
|
|
static void make_crc_table OF((void));
|
|
|
|
/*
|
|
Generate a table for a byte-wise 32-bit CRC calculation on the polynomial:
|
|
x^32+x^26+x^23+x^22+x^16+x^12+x^11+x^10+x^8+x^7+x^5+x^4+x^2+x+1.
|
|
|
|
Polynomials over GF(2) are represented in binary, one bit per coefficient,
|
|
with the lowest powers in the most significant bit. Then adding polynomials
|
|
is just exclusive-or, and multiplying a polynomial by x is a right shift by
|
|
one. If we call the above polynomial p, and represent a byte as the
|
|
polynomial q, also with the lowest power in the most significant bit (so the
|
|
byte 0xb1 is the polynomial x^7+x^3+x+1), then the CRC is (q*x^32) mod p,
|
|
where a mod b means the remainder after dividing a by b.
|
|
|
|
This calculation is done using the shift-register method of multiplying and
|
|
taking the remainder. The register is initialized to zero, and for each
|
|
incoming bit, x^32 is added mod p to the register if the bit is a one (where
|
|
x^32 mod p is p+x^32 = x^26+...+1), and the register is multiplied mod p by
|
|
x (which is shifting right by one and adding x^32 mod p if the bit shifted
|
|
out is a one). We start with the highest power (least significant bit) of
|
|
q and repeat for all eight bits of q.
|
|
|
|
The table is simply the CRC of all possible eight bit values. This is all
|
|
the information needed to generate CRC's on data a byte at a time for all
|
|
combinations of CRC register values and incoming bytes.
|
|
*/
|
|
static void make_crc_table()
|
|
{
|
|
uLong c;
|
|
int n, k;
|
|
uLong poly; /* polynomial exclusive-or pattern */
|
|
/* terms of polynomial defining this crc (except x^32): */
|
|
static const Byte p[] = {0,1,2,4,5,7,8,10,11,12,16,22,23,26};
|
|
|
|
/* make exclusive-or pattern from polynomial (0xedb88320L) */
|
|
poly = 0L;
|
|
for (n = 0; n < sizeof(p)/sizeof(Byte); n++)
|
|
poly |= 1L << (31 - p[n]);
|
|
|
|
for (n = 0; n < 256; n++)
|
|
{
|
|
c = (uLong)n;
|
|
for (k = 0; k < 8; k++)
|
|
c = c & 1 ? poly ^ (c >> 1) : c >> 1;
|
|
crc_table[n] = c;
|
|
}
|
|
crc_table_empty = 0;
|
|
}
|
|
#else
|
|
/* ========================================================================
|
|
* Table of CRC-32's of all single-byte values (made by make_crc_table)
|
|
*/
|
|
static const uLong crc_table[256] = {
|
|
0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L,
|
|
0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L,
|
|
0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L,
|
|
0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL,
|
|
0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L,
|
|
0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L,
|
|
0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L,
|
|
0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL,
|
|
0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L,
|
|
0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL,
|
|
0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L,
|
|
0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L,
|
|
0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L,
|
|
0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL,
|
|
0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL,
|
|
0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L,
|
|
0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL,
|
|
0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L,
|
|
0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L,
|
|
0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L,
|
|
0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL,
|
|
0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L,
|
|
0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L,
|
|
0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL,
|
|
0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L,
|
|
0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L,
|
|
0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L,
|
|
0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L,
|
|
0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L,
|
|
0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL,
|
|
0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL,
|
|
0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L,
|
|
0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L,
|
|
0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL,
|
|
0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL,
|
|
0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L,
|
|
0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL,
|
|
0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L,
|
|
0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL,
|
|
0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L,
|
|
0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL,
|
|
0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L,
|
|
0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L,
|
|
0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL,
|
|
0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L,
|
|
0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L,
|
|
0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L,
|
|
0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L,
|
|
0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L,
|
|
0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L,
|
|
0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL,
|
|
0x2d02ef8dL
|
|
};
|
|
#endif
|
|
|
|
/* =========================================================================
|
|
* This function can be used by asm versions of crc32()
|
|
*/
|
|
const uLong * get_crc_table()
|
|
{
|
|
#ifdef DYNAMIC_CRC_TABLE
|
|
if (crc_table_empty) make_crc_table();
|
|
#endif
|
|
return (const uLong *)crc_table;
|
|
}
|
|
|
|
/* ========================================================================= */
|
|
#define DO1(buf) crc = crc_table[((int)crc ^ (*buf++)) & 0xff] ^ (crc >> 8);
|
|
#define DO2(buf) DO1(buf); DO1(buf);
|
|
#define DO4(buf) DO2(buf); DO2(buf);
|
|
#define DO8(buf) DO4(buf); DO4(buf);
|
|
|
|
/* ========================================================================= */
|
|
uLong crc32(uLong crc, const Byte *buf, uInt len)
|
|
{
|
|
if (buf == Z_NULL) return 0L;
|
|
#ifdef DYNAMIC_CRC_TABLE
|
|
if (crc_table_empty)
|
|
make_crc_table();
|
|
#endif
|
|
crc = crc ^ 0xffffffffL;
|
|
while (len >= 8)
|
|
{
|
|
DO8(buf);
|
|
len -= 8;
|
|
}
|
|
if (len) do {
|
|
DO1(buf);
|
|
} while (--len);
|
|
return crc ^ 0xffffffffL;
|
|
}
|
|
|
|
/* infblock.h -- header to use infblock.c
|
|
* Copyright (C) 1995-1998 Mark Adler
|
|
* For conditions of distribution and use, see copyright notice in zlib.h
|
|
*/
|
|
|
|
/* WARNING: this file should *not* be used by applications. It is
|
|
part of the implementation of the compression library and is
|
|
subject to change. Applications should only use zlib.h.
|
|
*/
|
|
|
|
struct inflate_blocks_state;
|
|
typedef struct inflate_blocks_state inflate_blocks_statef;
|
|
|
|
extern inflate_blocks_statef * inflate_blocks_new OF((
|
|
z_streamp z,
|
|
check_func c, /* check function */
|
|
uInt w)); /* window size */
|
|
|
|
extern int inflate_blocks OF((
|
|
inflate_blocks_statef *,
|
|
z_streamp ,
|
|
int)); /* initial return code */
|
|
|
|
extern void inflate_blocks_reset OF((
|
|
inflate_blocks_statef *,
|
|
z_streamp ,
|
|
uLong *)); /* check value on output */
|
|
|
|
extern int inflate_blocks_free OF((
|
|
inflate_blocks_statef *,
|
|
z_streamp));
|
|
|
|
extern void inflate_set_dictionary OF((
|
|
inflate_blocks_statef *s,
|
|
const Byte *d, /* dictionary */
|
|
uInt n)); /* dictionary length */
|
|
|
|
extern int inflate_blocks_sync_point OF((
|
|
inflate_blocks_statef *s));
|
|
|
|
/* simplify the use of the inflate_huft type with some defines */
|
|
#define exop word.what.Exop
|
|
#define bits word.what.Bits
|
|
|
|
/* Table for deflate from PKZIP's appnote.txt. */
|
|
static const uInt border[] = { /* Order of the bit length code lengths */
|
|
16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15};
|
|
|
|
/* inftrees.h -- header to use inftrees.c
|
|
* Copyright (C) 1995-1998 Mark Adler
|
|
* For conditions of distribution and use, see copyright notice in zlib.h
|
|
*/
|
|
|
|
/* WARNING: this file should *not* be used by applications. It is
|
|
part of the implementation of the compression library and is
|
|
subject to change. Applications should only use zlib.h.
|
|
*/
|
|
|
|
/* Huffman code lookup table entry--this entry is four bytes for machines
|
|
that have 16-bit pointers (e.g. PC's in the small or medium model). */
|
|
|
|
typedef struct inflate_huft_s inflate_huft;
|
|
|
|
struct inflate_huft_s {
|
|
union {
|
|
struct {
|
|
Byte Exop; /* number of extra bits or operation */
|
|
Byte Bits; /* number of bits in this code or subcode */
|
|
} what;
|
|
uInt pad; /* pad structure to a power of 2 (4 bytes for */
|
|
} word; /* 16-bit, 8 bytes for 32-bit int's) */
|
|
uInt base; /* literal, length base, distance base,
|
|
or table offset */
|
|
};
|
|
|
|
/* Maximum size of dynamic tree. The maximum found in a long but non-
|
|
exhaustive search was 1004 huft structures (850 for length/literals
|
|
and 154 for distances, the latter actually the result of an
|
|
exhaustive search). The actual maximum is not known, but the
|
|
value below is more than safe. */
|
|
#define MANY 1440
|
|
|
|
extern int inflate_trees_bits OF((
|
|
uInt *, /* 19 code lengths */
|
|
uInt *, /* bits tree desired/actual depth */
|
|
inflate_huft * *, /* bits tree result */
|
|
inflate_huft *, /* space for trees */
|
|
z_streamp)); /* for messages */
|
|
|
|
extern int inflate_trees_dynamic OF((
|
|
uInt, /* number of literal/length codes */
|
|
uInt, /* number of distance codes */
|
|
uInt *, /* that many (total) code lengths */
|
|
uInt *, /* literal desired/actual bit depth */
|
|
uInt *, /* distance desired/actual bit depth */
|
|
inflate_huft * *, /* literal/length tree result */
|
|
inflate_huft * *, /* distance tree result */
|
|
inflate_huft *, /* space for trees */
|
|
z_streamp)); /* for messages */
|
|
|
|
extern int inflate_trees_fixed OF((
|
|
uInt *, /* literal desired/actual bit depth */
|
|
uInt *, /* distance desired/actual bit depth */
|
|
inflate_huft * *, /* literal/length tree result */
|
|
inflate_huft * *, /* distance tree result */
|
|
z_streamp)); /* for memory allocation */
|
|
|
|
|
|
/* infcodes.h -- header to use infcodes.c
|
|
* Copyright (C) 1995-1998 Mark Adler
|
|
* For conditions of distribution and use, see copyright notice in zlib.h
|
|
*/
|
|
|
|
/* WARNING: this file should *not* be used by applications. It is
|
|
part of the implementation of the compression library and is
|
|
subject to change. Applications should only use zlib.h.
|
|
*/
|
|
|
|
struct inflate_codes_state;
|
|
typedef struct inflate_codes_state inflate_codes_statef;
|
|
|
|
extern inflate_codes_statef *inflate_codes_new OF((
|
|
uInt, uInt,
|
|
inflate_huft *, inflate_huft *,
|
|
z_streamp ));
|
|
|
|
extern int inflate_codes OF((
|
|
inflate_blocks_statef *,
|
|
z_streamp ,
|
|
int));
|
|
|
|
extern void inflate_codes_free OF((
|
|
inflate_codes_statef *,
|
|
z_streamp ));
|
|
|
|
/* infutil.h -- types and macros common to blocks and codes
|
|
* Copyright (C) 1995-1998 Mark Adler
|
|
* For conditions of distribution and use, see copyright notice in zlib.h
|
|
*/
|
|
|
|
/* WARNING: this file should *not* be used by applications. It is
|
|
part of the implementation of the compression library and is
|
|
subject to change. Applications should only use zlib.h.
|
|
*/
|
|
|
|
#ifndef _INFUTIL_H
|
|
#define _INFUTIL_H
|
|
|
|
typedef enum {
|
|
TYPE, /* get type bits (3, including end bit) */
|
|
LENS, /* get lengths for stored */
|
|
STORED, /* processing stored block */
|
|
TABLE, /* get table lengths */
|
|
BTREE, /* get bit lengths tree for a dynamic block */
|
|
DTREE, /* get length, distance trees for a dynamic block */
|
|
CODES, /* processing fixed or dynamic block */
|
|
DRY, /* output remaining window bytes */
|
|
DONE, /* finished last block, done */
|
|
BAD} /* got a data error--stuck here */
|
|
inflate_block_mode;
|
|
|
|
/* inflate blocks semi-private state */
|
|
struct inflate_blocks_state {
|
|
|
|
/* mode */
|
|
inflate_block_mode mode; /* current inflate_block mode */
|
|
|
|
/* mode dependent information */
|
|
union {
|
|
uInt left; /* if STORED, bytes left to copy */
|
|
struct {
|
|
uInt table; /* table lengths (14 bits) */
|
|
uInt index; /* index into blens (or border) */
|
|
uInt *blens; /* bit lengths of codes */
|
|
uInt bb; /* bit length tree depth */
|
|
inflate_huft *tb; /* bit length decoding tree */
|
|
} trees; /* if DTREE, decoding info for trees */
|
|
struct {
|
|
inflate_codes_statef
|
|
*codes;
|
|
} decode; /* if CODES, current state */
|
|
} sub; /* submode */
|
|
uInt last; /* true if this block is the last block */
|
|
|
|
/* mode independent information */
|
|
uInt bitk; /* bits in bit buffer */
|
|
uLong bitb; /* bit buffer */
|
|
inflate_huft *hufts; /* single malloc for tree space */
|
|
Byte *window; /* sliding window */
|
|
Byte *end; /* one byte after sliding window */
|
|
Byte *read; /* window read pointer */
|
|
Byte *write; /* window write pointer */
|
|
check_func checkfn; /* check function */
|
|
uLong check; /* check on output */
|
|
|
|
};
|
|
|
|
|
|
/* defines for inflate input/output */
|
|
/* update pointers and return */
|
|
#define UPDBITS {s->bitb=b;s->bitk=k;}
|
|
#define UPDIN {z->avail_in=n;z->total_in+=p-z->next_in;z->next_in=p;}
|
|
#define UPDOUT {s->write=q;}
|
|
#define UPDATE {UPDBITS UPDIN UPDOUT}
|
|
#define LEAVE {UPDATE return inflate_flush(s,z,r);}
|
|
/* get bytes and bits */
|
|
#define LOADIN {p=z->next_in;n=z->avail_in;b=s->bitb;k=s->bitk;}
|
|
#define NEEDBYTE {if(n)r=Z_OK;else LEAVE}
|
|
#define NEXTBYTE (n--,*p++)
|
|
#define NEEDBITS(j) {while(k<(j)){NEEDBYTE;b|=((uLong)NEXTBYTE)<<k;k+=8;}}
|
|
#define DUMPBITS(j) {b>>=(j);k-=(j);}
|
|
/* output bytes */
|
|
#define WAVAIL (uInt)(q<s->read?s->read-q-1:s->end-q)
|
|
#define LOADOUT {q=s->write;m=(uInt)WAVAIL;}
|
|
#define WRAP {if(q==s->end&&s->read!=s->window){q=s->window;m=(uInt)WAVAIL;}}
|
|
#define FLUSH {UPDOUT r=inflate_flush(s,z,r); LOADOUT}
|
|
#define NEEDOUT {if(m==0){WRAP if(m==0){FLUSH WRAP if(m==0) LEAVE}}r=Z_OK;}
|
|
#define OUTBYTE(a) {*q++=(Byte)(a);m--;}
|
|
/* load static pointers */
|
|
#define LOAD {LOADIN LOADOUT}
|
|
|
|
/* masks for lower bits (size given to avoid silly warnings with Visual C++) */
|
|
static /* And'ing with mask[n] masks the lower n bits */
|
|
uInt inflate_mask[17] = {
|
|
0x0000,
|
|
0x0001, 0x0003, 0x0007, 0x000f, 0x001f, 0x003f, 0x007f, 0x00ff,
|
|
0x01ff, 0x03ff, 0x07ff, 0x0fff, 0x1fff, 0x3fff, 0x7fff, 0xffff
|
|
};
|
|
|
|
/* copy as much as possible from the sliding window to the output area */
|
|
extern int inflate_flush OF((
|
|
inflate_blocks_statef *,
|
|
z_streamp ,
|
|
int));
|
|
|
|
#endif
|
|
|
|
|
|
/*
|
|
Notes beyond the 1.93a appnote.txt:
|
|
|
|
1. Distance pointers never point before the beginning of the output
|
|
stream.
|
|
2. Distance pointers can point back across blocks, up to 32k away.
|
|
3. There is an implied maximum of 7 bits for the bit length table and
|
|
15 bits for the actual data.
|
|
4. If only one code exists, then it is encoded using one bit. (Zero
|
|
would be more efficient, but perhaps a little confusing.) If two
|
|
codes exist, they are coded using one bit each (0 and 1).
|
|
5. There is no way of sending zero distance codes--a dummy must be
|
|
sent if there are none. (History: a pre 2.0 version of PKZIP would
|
|
store blocks with no distance codes, but this was discovered to be
|
|
too harsh a criterion.) Valid only for 1.93a. 2.04c does allow
|
|
zero distance codes, which is sent as one code of zero bits in
|
|
length.
|
|
6. There are up to 286 literal/length codes. Code 256 represents the
|
|
end-of-block. Note however that the static length tree defines
|
|
288 codes just to fill out the Huffman codes. Codes 286 and 287
|
|
cannot be used though, since there is no length base or extra bits
|
|
defined for them. Similarily, there are up to 30 distance codes.
|
|
However, static trees define 32 codes (all 5 bits) to fill out the
|
|
Huffman codes, but the last two had better not show up in the data.
|
|
7. Unzip can check dynamic Huffman blocks for complete code sets.
|
|
The exception is that a single code would not be complete (see #4).
|
|
8. The five bits following the block type is really the number of
|
|
literal codes sent minus 257.
|
|
9. Length codes 8,16,16 are interpreted as 13 length codes of 8 bits
|
|
(1+6+6). Therefore, to output three times the length, you output
|
|
three codes (1+1+1), whereas to output four times the same length,
|
|
you only need two codes (1+3). Hmm.
|
|
10. In the tree reconstruction algorithm, Code = Code + Increment
|
|
only if BitLength(i) is not zero. (Pretty obvious.)
|
|
11. Correction: 4 Bits: # of Bit Length codes - 4 (4 - 19)
|
|
12. Note: length code 284 can represent 227-258, but length code 285
|
|
really is 258. The last length deserves its own, short code
|
|
since it gets used a lot in very redundant files. The length
|
|
258 is special since 258 - 3 (the min match length) is 255.
|
|
13. The literal/length and distance code bit lengths are read as a
|
|
single stream of lengths. It is possible (and advantageous) for
|
|
a repeat code (16, 17, or 18) to go across the boundary between
|
|
the two sets of lengths.
|
|
*/
|
|
|
|
|
|
void inflate_blocks_reset(inflate_blocks_statef *s, z_streamp z, uLong *c)
|
|
{
|
|
if (c != Z_NULL)
|
|
*c = s->check;
|
|
if (s->mode == BTREE || s->mode == DTREE)
|
|
ZFREE(z, s->sub.trees.blens);
|
|
if (s->mode == CODES)
|
|
inflate_codes_free(s->sub.decode.codes, z);
|
|
s->mode = TYPE;
|
|
s->bitk = 0;
|
|
s->bitb = 0;
|
|
s->read = s->write = s->window;
|
|
if (s->checkfn != Z_NULL)
|
|
z->adler = s->check = (*s->checkfn)(0L, (const Byte *)Z_NULL, 0);
|
|
Tracev(("inflate: blocks reset\n"));
|
|
}
|
|
|
|
|
|
inflate_blocks_statef *inflate_blocks_new(z_streamp z, check_func c, uInt w)
|
|
{
|
|
inflate_blocks_statef *s;
|
|
|
|
if ((s = (inflate_blocks_statef *)ZALLOC
|
|
(z,1,sizeof(struct inflate_blocks_state))) == Z_NULL)
|
|
return s;
|
|
if ((s->hufts =
|
|
(inflate_huft *)ZALLOC(z, sizeof(inflate_huft), MANY)) == Z_NULL)
|
|
{
|
|
ZFREE(z, s);
|
|
return Z_NULL;
|
|
}
|
|
if ((s->window = (Byte *)ZALLOC(z, 1, w)) == Z_NULL)
|
|
{
|
|
ZFREE(z, s->hufts);
|
|
ZFREE(z, s);
|
|
return Z_NULL;
|
|
}
|
|
s->end = s->window + w;
|
|
s->checkfn = c;
|
|
s->mode = TYPE;
|
|
Tracev(("inflate: blocks allocated\n"));
|
|
inflate_blocks_reset(s, z, Z_NULL);
|
|
return s;
|
|
}
|
|
|
|
|
|
int inflate_blocks(inflate_blocks_statef *s, z_streamp z, int r)
|
|
{
|
|
uInt t; /* temporary storage */
|
|
uLong b; /* bit buffer */
|
|
uInt k; /* bits in bit buffer */
|
|
Byte *p; /* input data pointer */
|
|
uInt n; /* bytes available there */
|
|
Byte *q; /* output window write pointer */
|
|
uInt m; /* bytes to end of window or read pointer */
|
|
|
|
/* copy input/output information to locals (UPDATE macro restores) */
|
|
LOAD
|
|
|
|
/* process input based on current state */
|
|
while (1) switch (s->mode)
|
|
{
|
|
case TYPE:
|
|
NEEDBITS(3)
|
|
t = (uInt)b & 7;
|
|
s->last = t & 1;
|
|
switch (t >> 1)
|
|
{
|
|
case 0: /* stored */
|
|
Tracev(("inflate: stored block%s\n",
|
|
s->last ? " (last)" : ""));
|
|
DUMPBITS(3)
|
|
t = k & 7; /* go to byte boundary */
|
|
DUMPBITS(t)
|
|
s->mode = LENS; /* get length of stored block */
|
|
break;
|
|
case 1: /* fixed */
|
|
Tracev(("inflate: fixed codes block%s\n",
|
|
s->last ? " (last)" : ""));
|
|
{
|
|
uInt bl, bd;
|
|
inflate_huft *tl, *td;
|
|
|
|
inflate_trees_fixed(&bl, &bd, &tl, &td, z);
|
|
s->sub.decode.codes = inflate_codes_new(bl, bd, tl, td, z);
|
|
if (s->sub.decode.codes == Z_NULL)
|
|
{
|
|
r = Z_MEM_ERROR;
|
|
LEAVE
|
|
}
|
|
}
|
|
DUMPBITS(3)
|
|
s->mode = CODES;
|
|
break;
|
|
case 2: /* dynamic */
|
|
Tracev(("inflate: dynamic codes block%s\n",
|
|
s->last ? " (last)" : ""));
|
|
DUMPBITS(3)
|
|
s->mode = TABLE;
|
|
break;
|
|
case 3: /* illegal */
|
|
DUMPBITS(3)
|
|
s->mode = BAD;
|
|
z->msg = (char*)"invalid block type";
|
|
r = Z_DATA_ERROR;
|
|
LEAVE
|
|
}
|
|
break;
|
|
case LENS:
|
|
NEEDBITS(32)
|
|
if ((((~b) >> 16) & 0xffff) != (b & 0xffff))
|
|
{
|
|
s->mode = BAD;
|
|
z->msg = (char*)"invalid stored block lengths";
|
|
r = Z_DATA_ERROR;
|
|
LEAVE
|
|
}
|
|
s->sub.left = (uInt)b & 0xffff;
|
|
b = k = 0; /* dump bits */
|
|
Tracev(("inflate: stored length %u\n", s->sub.left));
|
|
s->mode = s->sub.left ? STORED : (s->last ? DRY : TYPE);
|
|
break;
|
|
case STORED:
|
|
if (n == 0)
|
|
LEAVE
|
|
NEEDOUT
|
|
t = s->sub.left;
|
|
if (t > n) t = n;
|
|
if (t > m) t = m;
|
|
#ifdef MACOS_X // Optimization
|
|
if (t>64) {
|
|
zmemcpy(q, p, t);
|
|
}
|
|
else {
|
|
int t1;
|
|
for (t1=0; t1<t; t1++) {
|
|
q[t1] = p[t1];
|
|
}
|
|
}
|
|
#else
|
|
zmemcpy(q, p, t);
|
|
#endif
|
|
p += t; n -= t;
|
|
q += t; m -= t;
|
|
if ((s->sub.left -= t) != 0)
|
|
break;
|
|
Tracev(("inflate: stored end, %lu total out\n",
|
|
z->total_out + (q >= s->read ? q - s->read :
|
|
(s->end - s->read) + (q - s->window))));
|
|
s->mode = s->last ? DRY : TYPE;
|
|
break;
|
|
case TABLE:
|
|
NEEDBITS(14)
|
|
s->sub.trees.table = t = (uInt)b & 0x3fff;
|
|
#ifndef PKZIP_BUG_WORKAROUND
|
|
if ((t & 0x1f) > 29 || ((t >> 5) & 0x1f) > 29)
|
|
{
|
|
s->mode = BAD;
|
|
z->msg = (char*)"too many length or distance symbols";
|
|
r = Z_DATA_ERROR;
|
|
LEAVE
|
|
}
|
|
#endif
|
|
t = 258 + (t & 0x1f) + ((t >> 5) & 0x1f);
|
|
if ((s->sub.trees.blens = (uInt*)ZALLOC(z, t, sizeof(uInt))) == Z_NULL)
|
|
{
|
|
r = Z_MEM_ERROR;
|
|
LEAVE
|
|
}
|
|
DUMPBITS(14)
|
|
s->sub.trees.index = 0;
|
|
Tracev(("inflate: table sizes ok\n"));
|
|
s->mode = BTREE;
|
|
case BTREE:
|
|
while (s->sub.trees.index < 4 + (s->sub.trees.table >> 10))
|
|
{
|
|
NEEDBITS(3)
|
|
s->sub.trees.blens[border[s->sub.trees.index++]] = (uInt)b & 7;
|
|
DUMPBITS(3)
|
|
}
|
|
while (s->sub.trees.index < 19)
|
|
s->sub.trees.blens[border[s->sub.trees.index++]] = 0;
|
|
s->sub.trees.bb = 7;
|
|
t = inflate_trees_bits(s->sub.trees.blens, &s->sub.trees.bb,
|
|
&s->sub.trees.tb, s->hufts, z);
|
|
if (t != Z_OK)
|
|
{
|
|
ZFREE(z, s->sub.trees.blens);
|
|
r = t;
|
|
if (r == Z_DATA_ERROR)
|
|
s->mode = BAD;
|
|
LEAVE
|
|
}
|
|
s->sub.trees.index = 0;
|
|
Tracev(("inflate: bits tree ok\n"));
|
|
s->mode = DTREE;
|
|
case DTREE:
|
|
while (t = s->sub.trees.table,
|
|
s->sub.trees.index < 258 + (t & 0x1f) + ((t >> 5) & 0x1f))
|
|
{
|
|
inflate_huft *h;
|
|
uInt i, j, c;
|
|
|
|
t = s->sub.trees.bb;
|
|
NEEDBITS(t)
|
|
h = s->sub.trees.tb + ((uInt)b & inflate_mask[t]);
|
|
t = h->bits;
|
|
c = h->base;
|
|
if (c < 16)
|
|
{
|
|
DUMPBITS(t)
|
|
s->sub.trees.blens[s->sub.trees.index++] = c;
|
|
}
|
|
else /* c == 16..18 */
|
|
{
|
|
i = c == 18 ? 7 : c - 14;
|
|
j = c == 18 ? 11 : 3;
|
|
NEEDBITS(t + i)
|
|
DUMPBITS(t)
|
|
j += (uInt)b & inflate_mask[i];
|
|
DUMPBITS(i)
|
|
i = s->sub.trees.index;
|
|
t = s->sub.trees.table;
|
|
if (i + j > 258 + (t & 0x1f) + ((t >> 5) & 0x1f) ||
|
|
(c == 16 && i < 1))
|
|
{
|
|
ZFREE(z, s->sub.trees.blens);
|
|
s->mode = BAD;
|
|
z->msg = (char*)"invalid bit length repeat";
|
|
r = Z_DATA_ERROR;
|
|
LEAVE
|
|
}
|
|
c = c == 16 ? s->sub.trees.blens[i - 1] : 0;
|
|
do {
|
|
s->sub.trees.blens[i++] = c;
|
|
} while (--j);
|
|
s->sub.trees.index = i;
|
|
}
|
|
}
|
|
s->sub.trees.tb = Z_NULL;
|
|
{
|
|
uInt bl, bd;
|
|
inflate_huft *tl, *td;
|
|
inflate_codes_statef *c;
|
|
|
|
bl = 9; /* must be <= 9 for lookahead assumptions */
|
|
bd = 6; /* must be <= 9 for lookahead assumptions */
|
|
t = s->sub.trees.table;
|
|
t = inflate_trees_dynamic(257 + (t & 0x1f), 1 + ((t >> 5) & 0x1f),
|
|
s->sub.trees.blens, &bl, &bd, &tl, &td,
|
|
s->hufts, z);
|
|
ZFREE(z, s->sub.trees.blens);
|
|
if (t != Z_OK)
|
|
{
|
|
if (t == (uInt)Z_DATA_ERROR)
|
|
s->mode = BAD;
|
|
r = t;
|
|
LEAVE
|
|
}
|
|
Tracev(("inflate: trees ok\n"));
|
|
if ((c = inflate_codes_new(bl, bd, tl, td, z)) == Z_NULL)
|
|
{
|
|
r = Z_MEM_ERROR;
|
|
LEAVE
|
|
}
|
|
s->sub.decode.codes = c;
|
|
}
|
|
s->mode = CODES;
|
|
case CODES:
|
|
UPDATE
|
|
if ((r = inflate_codes(s, z, r)) != Z_STREAM_END)
|
|
return inflate_flush(s, z, r);
|
|
r = Z_OK;
|
|
inflate_codes_free(s->sub.decode.codes, z);
|
|
LOAD
|
|
Tracev(("inflate: codes end, %lu total out\n",
|
|
z->total_out + (q >= s->read ? q - s->read :
|
|
(s->end - s->read) + (q - s->window))));
|
|
if (!s->last)
|
|
{
|
|
s->mode = TYPE;
|
|
break;
|
|
}
|
|
s->mode = DRY;
|
|
case DRY:
|
|
FLUSH
|
|
if (s->read != s->write)
|
|
LEAVE
|
|
s->mode = DONE;
|
|
case DONE:
|
|
r = Z_STREAM_END;
|
|
LEAVE
|
|
case BAD:
|
|
r = Z_DATA_ERROR;
|
|
LEAVE
|
|
default:
|
|
r = Z_STREAM_ERROR;
|
|
LEAVE
|
|
}
|
|
}
|
|
|
|
|
|
int inflate_blocks_free(inflate_blocks_statef *s, z_streamp z)
|
|
{
|
|
inflate_blocks_reset(s, z, Z_NULL);
|
|
ZFREE(z, s->window);
|
|
ZFREE(z, s->hufts);
|
|
ZFREE(z, s);
|
|
Tracev(("inflate: blocks freed\n"));
|
|
return Z_OK;
|
|
}
|
|
|
|
|
|
void inflate_set_dictionary(inflate_blocks_statef *s, const Byte *d, uInt n)
|
|
{
|
|
zmemcpy(s->window, d, n);
|
|
s->read = s->write = s->window + n;
|
|
}
|
|
|
|
|
|
/* Returns true if inflate is currently at the end of a block generated
|
|
* by Z_SYNC_FLUSH or Z_FULL_FLUSH.
|
|
* IN assertion: s != Z_NULL
|
|
*/
|
|
int inflate_blocks_sync_point(inflate_blocks_statef *s)
|
|
{
|
|
return s->mode == LENS;
|
|
}
|
|
|
|
/* copy as much as possible from the sliding window to the output area */
|
|
int inflate_flush(inflate_blocks_statef *s, z_streamp z, int r)
|
|
{
|
|
uInt n;
|
|
Byte *p;
|
|
Byte *q;
|
|
|
|
/* static copies of source and destination pointers */
|
|
p = z->next_out;
|
|
q = s->read;
|
|
|
|
/* compute number of bytes to copy as as end of window */
|
|
n = (uInt)((q <= s->write ? s->write : s->end) - q);
|
|
if (n > z->avail_out) n = z->avail_out;
|
|
if (n && r == Z_BUF_ERROR) r = Z_OK;
|
|
|
|
/* update counters */
|
|
z->avail_out -= n;
|
|
z->total_out += n;
|
|
|
|
/* update check information */
|
|
if (s->checkfn != Z_NULL)
|
|
z->adler = s->check = (*s->checkfn)(s->check, q, n);
|
|
|
|
/* copy as as end of window */
|
|
#ifdef MACOS_X // Optimization
|
|
if (n>64) {
|
|
zmemcpy(p, q, n);
|
|
}
|
|
else {
|
|
int t1;
|
|
for (t1=0; t1<n; t1++) {
|
|
p[t1] = q[t1];
|
|
}
|
|
}
|
|
#else
|
|
zmemcpy(p, q, n);
|
|
#endif
|
|
p += n;
|
|
q += n;
|
|
|
|
/* see if more to copy at beginning of window */
|
|
if (q == s->end)
|
|
{
|
|
/* wrap pointers */
|
|
q = s->window;
|
|
if (s->write == s->end)
|
|
s->write = s->window;
|
|
|
|
/* compute bytes to copy */
|
|
n = (uInt)(s->write - q);
|
|
if (n > z->avail_out) n = z->avail_out;
|
|
if (n && r == Z_BUF_ERROR) r = Z_OK;
|
|
|
|
/* update counters */
|
|
z->avail_out -= n;
|
|
z->total_out += n;
|
|
|
|
/* update check information */
|
|
if (s->checkfn != Z_NULL)
|
|
z->adler = s->check = (*s->checkfn)(s->check, q, n);
|
|
|
|
/* copy */
|
|
#ifdef MACOS_X // Optimization
|
|
if (n>64) {
|
|
zmemcpy(p, q, n);
|
|
}
|
|
else {
|
|
int t1;
|
|
for (t1=0; t1<n; t1++) {
|
|
p[t1] = q[t1];
|
|
}
|
|
}
|
|
#else
|
|
zmemcpy(p, q, n);
|
|
#endif
|
|
p += n;
|
|
q += n;
|
|
}
|
|
|
|
/* update pointers */
|
|
z->next_out = p;
|
|
s->read = q;
|
|
|
|
/* done */
|
|
return r;
|
|
}
|
|
|
|
/* inftrees.c -- generate Huffman trees for efficient decoding
|
|
* Copyright (C) 1995-1998 Mark Adler
|
|
* For conditions of distribution and use, see copyright notice in zlib.h
|
|
*/
|
|
|
|
const char inflate_copyright[] =
|
|
" inflate 1.1.3 Copyright 1995-1998 Mark Adler ";
|
|
/*
|
|
If you use the zlib library in a product, an acknowledgment is welcome
|
|
in the documentation of your product. If for some reason you cannot
|
|
include such an acknowledgment, I would appreciate that you keep this
|
|
copyright string in the executable of your product.
|
|
*/
|
|
|
|
/* simplify the use of the inflate_huft type with some defines */
|
|
#define exop word.what.Exop
|
|
#define bits word.what.Bits
|
|
|
|
|
|
static int huft_build OF((
|
|
uInt *, /* code lengths in bits */
|
|
uInt, /* number of codes */
|
|
uInt, /* number of "simple" codes */
|
|
const uInt *, /* list of base values for non-simple codes */
|
|
const uInt *, /* list of extra bits for non-simple codes */
|
|
inflate_huft **, /* result: starting table */
|
|
uInt *, /* maximum lookup bits (returns actual) */
|
|
inflate_huft *, /* space for trees */
|
|
uInt *, /* hufts used in space */
|
|
uInt * )); /* space for values */
|
|
|
|
/* Tables for deflate from PKZIP's appnote.txt. */
|
|
static const uInt cplens[31] = { /* Copy lengths for literal codes 257..285 */
|
|
3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31,
|
|
35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258, 0, 0};
|
|
/* see note #13 above about 258 */
|
|
static const uInt cplext[31] = { /* Extra bits for literal codes 257..285 */
|
|
0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2,
|
|
3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0, 112, 112}; /* 112==invalid */
|
|
static const uInt cpdist[30] = { /* Copy offsets for distance codes 0..29 */
|
|
1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193,
|
|
257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145,
|
|
8193, 12289, 16385, 24577};
|
|
static const uInt cpdext[30] = { /* Extra bits for distance codes */
|
|
0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6,
|
|
7, 7, 8, 8, 9, 9, 10, 10, 11, 11,
|
|
12, 12, 13, 13};
|
|
|
|
/*
|
|
Huffman code decoding is performed using a multi-level table lookup.
|
|
The fastest way to decode is to simply build a lookup table whose
|
|
size is determined by the longest code. However, the time it takes
|
|
to build this table can also be a factor if the data being decoded
|
|
is not very long. The most common codes are necessarily the
|
|
shortest codes, so those codes dominate the decoding time, and hence
|
|
the speed. The idea is you can have a shorter table that decodes the
|
|
shorter, more probable codes, and then point to subsidiary tables for
|
|
the longer codes. The time it costs to decode the longer codes is
|
|
then traded against the time it takes to make longer tables.
|
|
|
|
This results of this trade are in the variables lbits and dbits
|
|
below. lbits is the number of bits the first level table for literal/
|
|
length codes can decode in one step, and dbits is the same thing for
|
|
the distance codes. Subsequent tables are also less than or equal to
|
|
those sizes. These values may be adjusted either when all of the
|
|
codes are shorter than that, in which case the longest code length in
|
|
bits is used, or when the shortest code is *longer* than the requested
|
|
table size, in which case the length of the shortest code in bits is
|
|
used.
|
|
|
|
There are two different values for the two tables, since they code a
|
|
different number of possibilities each. The literal/length table
|
|
codes 286 possible values, or in a flat code, a little over eight
|
|
bits. The distance table codes 30 possible values, or a little less
|
|
than five bits, flat. The optimum values for speed end up being
|
|
about one bit more than those, so lbits is 8+1 and dbits is 5+1.
|
|
The optimum values may differ though from machine to machine, and
|
|
possibly even between compilers. Your mileage may vary.
|
|
*/
|
|
|
|
|
|
/* If BMAX needs to be larger than 16, then h and x[] should be uLong. */
|
|
#define BMAX 15 /* maximum bit length of any code */
|
|
|
|
static int huft_build(uInt *b, uInt n, uInt s, const uInt *d, const uInt *e, inflate_huft ** t, uInt *m, inflate_huft *hp, uInt *hn, uInt *v)
|
|
//uInt *b; /* code lengths in bits (all assumed <= BMAX) */
|
|
//uInt n; /* number of codes (assumed <= 288) */
|
|
//uInt s; /* number of simple-valued codes (0..s-1) */
|
|
//const uInt *d; /* list of base values for non-simple codes */
|
|
//const uInt *e; /* list of extra bits for non-simple codes */
|
|
//inflate_huft ** t; /* result: starting table */
|
|
//uInt *m; /* maximum lookup bits, returns actual */
|
|
//inflate_huft *hp; /* space for trees */
|
|
//uInt *hn; /* hufts used in space */
|
|
//uInt *v; /* working area: values in order of bit length */
|
|
/* Given a list of code lengths and a maximum table size, make a set of
|
|
tables to decode that set of codes. Return Z_OK on success, Z_BUF_ERROR
|
|
if the given code set is incomplete (the tables are still built in this
|
|
case), Z_DATA_ERROR if the input is invalid (an over-subscribed set of
|
|
lengths), or Z_MEM_ERROR if not enough memory. */
|
|
{
|
|
|
|
uInt a; /* counter for codes of length k */
|
|
uInt c[BMAX+1]; /* bit length count table */
|
|
uInt f; /* i repeats in table every f entries */
|
|
int g; /* maximum code length */
|
|
int h; /* table level */
|
|
register uInt i; /* counter, current code */
|
|
register uInt j; /* counter */
|
|
register int k; /* number of bits in current code */
|
|
int l; /* bits per table (returned in m) */
|
|
uInt mask; /* (1 << w) - 1, to avoid cc -O bug on HP */
|
|
register uInt *p; /* pointer into c[], b[], or v[] */
|
|
inflate_huft *q; /* points to current table */
|
|
struct inflate_huft_s r; /* table entry for structure assignment */
|
|
inflate_huft *u[BMAX]; /* table stack */
|
|
register int w; /* bits before this table == (l * h) */
|
|
uInt x[BMAX+1]; /* bit offsets, then code stack */
|
|
uInt *xp; /* pointer into x */
|
|
int y; /* number of dummy codes added */
|
|
uInt z; /* number of entries in current table */
|
|
|
|
|
|
/* Generate counts for each bit length */
|
|
p = c;
|
|
#define C0 *p++ = 0;
|
|
#define C2 C0 C0 C0 C0
|
|
#define C4 C2 C2 C2 C2
|
|
C4 /* clear c[]--assume BMAX+1 is 16 */
|
|
p = b; i = n;
|
|
do {
|
|
c[*p++]++; /* assume all entries <= BMAX */
|
|
} while (--i);
|
|
if (c[0] == n) /* null input--all zero length codes */
|
|
{
|
|
*t = (inflate_huft *)Z_NULL;
|
|
*m = 0;
|
|
return Z_OK;
|
|
}
|
|
|
|
|
|
/* Find minimum and maximum length, bound *m by those */
|
|
l = *m;
|
|
for (j = 1; j <= BMAX; j++)
|
|
if (c[j])
|
|
break;
|
|
k = j; /* minimum code length */
|
|
if ((uInt)l < j)
|
|
l = j;
|
|
for (i = BMAX; i; i--)
|
|
if (c[i])
|
|
break;
|
|
g = i; /* maximum code length */
|
|
if ((uInt)l > i)
|
|
l = i;
|
|
*m = l;
|
|
|
|
|
|
/* Adjust last length count to fill out codes, if needed */
|
|
for (y = 1 << j; j < i; j++, y <<= 1)
|
|
if ((y -= c[j]) < 0)
|
|
return Z_DATA_ERROR;
|
|
if ((y -= c[i]) < 0)
|
|
return Z_DATA_ERROR;
|
|
c[i] += y;
|
|
|
|
|
|
/* Generate starting offsets into the value table for each length */
|
|
x[1] = j = 0;
|
|
p = c + 1; xp = x + 2;
|
|
while (--i) { /* note that i == g from above */
|
|
*xp++ = (j += *p++);
|
|
}
|
|
|
|
|
|
/* Make a table of values in order of bit lengths */
|
|
p = b; i = 0;
|
|
do {
|
|
if ((j = *p++) != 0)
|
|
v[x[j]++] = i;
|
|
} while (++i < n);
|
|
n = x[g]; /* set n to length of v */
|
|
|
|
|
|
/* Generate the Huffman codes and for each, make the table entries */
|
|
x[0] = i = 0; /* first Huffman code is zero */
|
|
p = v; /* grab values in bit order */
|
|
h = -1; /* no tables yet--level -1 */
|
|
w = -l; /* bits decoded == (l * h) */
|
|
u[0] = (inflate_huft *)Z_NULL; /* just to keep compilers happy */
|
|
q = (inflate_huft *)Z_NULL; /* ditto */
|
|
z = 0; /* ditto */
|
|
|
|
/* go through the bit lengths (k already is bits in shortest code) */
|
|
for (; k <= g; k++)
|
|
{
|
|
a = c[k];
|
|
while (a--)
|
|
{
|
|
/* here i is the Huffman code of length k bits for value *p */
|
|
/* make tables up to required level */
|
|
while (k > w + l)
|
|
{
|
|
h++;
|
|
w += l; /* previous table always l bits */
|
|
|
|
/* compute minimum size table less than or equal to l bits */
|
|
z = g - w;
|
|
z = z > (uInt)l ? l : z; /* table size upper limit */
|
|
if ((f = 1 << (j = k - w)) > a + 1) /* try a k-w bit table */
|
|
{ /* too few codes for k-w bit table */
|
|
f -= a + 1; /* deduct codes from patterns left */
|
|
xp = c + k;
|
|
if (j < z)
|
|
while (++j < z) /* try smaller tables up to z bits */
|
|
{
|
|
if ((f <<= 1) <= *++xp)
|
|
break; /* enough codes to use up j bits */
|
|
f -= *xp; /* else deduct codes from patterns */
|
|
}
|
|
}
|
|
z = 1 << j; /* table entries for j-bit table */
|
|
|
|
/* allocate new table */
|
|
if (*hn + z > MANY) /* (note: doesn't matter for fixed) */
|
|
return Z_MEM_ERROR; /* not enough memory */
|
|
u[h] = q = hp + *hn;
|
|
*hn += z;
|
|
|
|
/* connect to last table, if there is one */
|
|
if (h)
|
|
{
|
|
x[h] = i; /* save pattern for backing up */
|
|
r.bits = (Byte)l; /* bits to dump before this table */
|
|
r.exop = (Byte)j; /* bits in this table */
|
|
j = i >> (w - l);
|
|
r.base = (uInt)(q - u[h-1] - j); /* offset to this table */
|
|
u[h-1][j] = r; /* connect to last table */
|
|
}
|
|
else
|
|
*t = q; /* first table is returned result */
|
|
}
|
|
|
|
/* set up table entry in r */
|
|
r.bits = (Byte)(k - w);
|
|
if (p >= v + n)
|
|
r.exop = 128 + 64; /* out of values--invalid code */
|
|
else if (*p < s)
|
|
{
|
|
r.exop = (Byte)(*p < 256 ? 0 : 32 + 64); /* 256 is end-of-block */
|
|
r.base = *p++; /* simple code is just the value */
|
|
}
|
|
else
|
|
{
|
|
r.exop = (Byte)(e[*p - s] + 16 + 64);/* non-simple--look up in lists */
|
|
r.base = d[*p++ - s];
|
|
}
|
|
|
|
/* fill code-like entries with r */
|
|
f = 1 << (k - w);
|
|
for (j = i >> w; j < z; j += f)
|
|
q[j] = r;
|
|
|
|
/* backwards increment the k-bit code i */
|
|
for (j = 1 << (k - 1); i & j; j >>= 1)
|
|
i ^= j;
|
|
i ^= j;
|
|
|
|
/* backup over finished tables */
|
|
mask = (1 << w) - 1; /* needed on HP, cc -O bug */
|
|
while ((i & mask) != x[h])
|
|
{
|
|
h--; /* don't need to update q */
|
|
w -= l;
|
|
mask = (1 << w) - 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/* Return Z_BUF_ERROR if we were given an incomplete table */
|
|
return y != 0 && g != 1 ? Z_BUF_ERROR : Z_OK;
|
|
}
|
|
|
|
|
|
int inflate_trees_bits(uInt *c, uInt *bb, inflate_huft * *tb, inflate_huft *hp, z_streamp z)
|
|
//uInt *c; /* 19 code lengths */
|
|
//uInt *bb; /* bits tree desired/actual depth */
|
|
//inflate_huft * *tb; /* bits tree result */
|
|
//inflate_huft *hp; /* space for trees */
|
|
//z_streamp z; /* for messages */
|
|
{
|
|
int r;
|
|
uInt hn = 0; /* hufts used in space */
|
|
uInt *v; /* work area for huft_build */
|
|
|
|
if ((v = (uInt*)ZALLOC(z, 19, sizeof(uInt))) == Z_NULL)
|
|
return Z_MEM_ERROR;
|
|
r = huft_build(c, 19, 19, (uInt*)Z_NULL, (uInt*)Z_NULL,
|
|
tb, bb, hp, &hn, v);
|
|
if (r == Z_DATA_ERROR)
|
|
z->msg = (char*)"oversubscribed dynamic bit lengths tree";
|
|
else if (r == Z_BUF_ERROR || *bb == 0)
|
|
{
|
|
z->msg = (char*)"incomplete dynamic bit lengths tree";
|
|
r = Z_DATA_ERROR;
|
|
}
|
|
ZFREE(z, v);
|
|
return r;
|
|
}
|
|
|
|
|
|
int inflate_trees_dynamic(uInt nl, uInt nd, uInt *c, uInt *bl, uInt *bd, inflate_huft * *tl, inflate_huft * *td, inflate_huft *hp, z_streamp z)
|
|
//uInt nl; /* number of literal/length codes */
|
|
//uInt nd; /* number of distance codes */
|
|
//uInt *c; /* that many (total) code lengths */
|
|
//uInt *bl; /* literal desired/actual bit depth */
|
|
//uInt *bd; /* distance desired/actual bit depth */
|
|
//inflate_huft * *tl; /* literal/length tree result */
|
|
//inflate_huft * *td; /* distance tree result */
|
|
//inflate_huft *hp; /* space for trees */
|
|
//z_streamp z; /* for messages */
|
|
{
|
|
int r;
|
|
uInt hn = 0; /* hufts used in space */
|
|
uInt *v; /* work area for huft_build */
|
|
|
|
/* allocate work area */
|
|
if ((v = (uInt*)ZALLOC(z, 288, sizeof(uInt))) == Z_NULL)
|
|
return Z_MEM_ERROR;
|
|
|
|
/* build literal/length tree */
|
|
r = huft_build(c, nl, 257, cplens, cplext, tl, bl, hp, &hn, v);
|
|
if (r != Z_OK || *bl == 0)
|
|
{
|
|
if (r == Z_DATA_ERROR)
|
|
z->msg = (char*)"oversubscribed literal/length tree";
|
|
else if (r != Z_MEM_ERROR)
|
|
{
|
|
z->msg = (char*)"incomplete literal/length tree";
|
|
r = Z_DATA_ERROR;
|
|
}
|
|
ZFREE(z, v);
|
|
return r;
|
|
}
|
|
|
|
/* build distance tree */
|
|
r = huft_build(c + nl, nd, 0, cpdist, cpdext, td, bd, hp, &hn, v);
|
|
if (r != Z_OK || (*bd == 0 && nl > 257))
|
|
{
|
|
if (r == Z_DATA_ERROR)
|
|
z->msg = (char*)"oversubscribed distance tree";
|
|
else if (r == Z_BUF_ERROR) {
|
|
#ifdef PKZIP_BUG_WORKAROUND
|
|
r = Z_OK;
|
|
}
|
|
#else
|
|
z->msg = (char*)"incomplete distance tree";
|
|
r = Z_DATA_ERROR;
|
|
}
|
|
else if (r != Z_MEM_ERROR)
|
|
{
|
|
z->msg = (char*)"empty distance tree with lengths";
|
|
r = Z_DATA_ERROR;
|
|
}
|
|
ZFREE(z, v);
|
|
return r;
|
|
#endif
|
|
}
|
|
|
|
/* done */
|
|
ZFREE(z, v);
|
|
return Z_OK;
|
|
}
|
|
|
|
/* inffixed.h -- table for decoding fixed codes
|
|
* Generated automatically by the maketree.c program
|
|
*/
|
|
|
|
/* WARNING: this file should *not* be used by applications. It is
|
|
part of the implementation of the compression library and is
|
|
subject to change. Applications should only use zlib.h.
|
|
*/
|
|
|
|
static uInt fixed_bl = 9;
|
|
static uInt fixed_bd = 5;
|
|
static inflate_huft fixed_tl[] = {
|
|
{{{96,7}},256}, {{{0,8}},80}, {{{0,8}},16}, {{{84,8}},115},
|
|
{{{82,7}},31}, {{{0,8}},112}, {{{0,8}},48}, {{{0,9}},192},
|
|
{{{80,7}},10}, {{{0,8}},96}, {{{0,8}},32}, {{{0,9}},160},
|
|
{{{0,8}},0}, {{{0,8}},128}, {{{0,8}},64}, {{{0,9}},224},
|
|
{{{80,7}},6}, {{{0,8}},88}, {{{0,8}},24}, {{{0,9}},144},
|
|
{{{83,7}},59}, {{{0,8}},120}, {{{0,8}},56}, {{{0,9}},208},
|
|
{{{81,7}},17}, {{{0,8}},104}, {{{0,8}},40}, {{{0,9}},176},
|
|
{{{0,8}},8}, {{{0,8}},136}, {{{0,8}},72}, {{{0,9}},240},
|
|
{{{80,7}},4}, {{{0,8}},84}, {{{0,8}},20}, {{{85,8}},227},
|
|
{{{83,7}},43}, {{{0,8}},116}, {{{0,8}},52}, {{{0,9}},200},
|
|
{{{81,7}},13}, {{{0,8}},100}, {{{0,8}},36}, {{{0,9}},168},
|
|
{{{0,8}},4}, {{{0,8}},132}, {{{0,8}},68}, {{{0,9}},232},
|
|
{{{80,7}},8}, {{{0,8}},92}, {{{0,8}},28}, {{{0,9}},152},
|
|
{{{84,7}},83}, {{{0,8}},124}, {{{0,8}},60}, {{{0,9}},216},
|
|
{{{82,7}},23}, {{{0,8}},108}, {{{0,8}},44}, {{{0,9}},184},
|
|
{{{0,8}},12}, {{{0,8}},140}, {{{0,8}},76}, {{{0,9}},248},
|
|
{{{80,7}},3}, {{{0,8}},82}, {{{0,8}},18}, {{{85,8}},163},
|
|
{{{83,7}},35}, {{{0,8}},114}, {{{0,8}},50}, {{{0,9}},196},
|
|
{{{81,7}},11}, {{{0,8}},98}, {{{0,8}},34}, {{{0,9}},164},
|
|
{{{0,8}},2}, {{{0,8}},130}, {{{0,8}},66}, {{{0,9}},228},
|
|
{{{80,7}},7}, {{{0,8}},90}, {{{0,8}},26}, {{{0,9}},148},
|
|
{{{84,7}},67}, {{{0,8}},122}, {{{0,8}},58}, {{{0,9}},212},
|
|
{{{82,7}},19}, {{{0,8}},106}, {{{0,8}},42}, {{{0,9}},180},
|
|
{{{0,8}},10}, {{{0,8}},138}, {{{0,8}},74}, {{{0,9}},244},
|
|
{{{80,7}},5}, {{{0,8}},86}, {{{0,8}},22}, {{{192,8}},0},
|
|
{{{83,7}},51}, {{{0,8}},118}, {{{0,8}},54}, {{{0,9}},204},
|
|
{{{81,7}},15}, {{{0,8}},102}, {{{0,8}},38}, {{{0,9}},172},
|
|
{{{0,8}},6}, {{{0,8}},134}, {{{0,8}},70}, {{{0,9}},236},
|
|
{{{80,7}},9}, {{{0,8}},94}, {{{0,8}},30}, {{{0,9}},156},
|
|
{{{84,7}},99}, {{{0,8}},126}, {{{0,8}},62}, {{{0,9}},220},
|
|
{{{82,7}},27}, {{{0,8}},110}, {{{0,8}},46}, {{{0,9}},188},
|
|
{{{0,8}},14}, {{{0,8}},142}, {{{0,8}},78}, {{{0,9}},252},
|
|
{{{96,7}},256}, {{{0,8}},81}, {{{0,8}},17}, {{{85,8}},131},
|
|
{{{82,7}},31}, {{{0,8}},113}, {{{0,8}},49}, {{{0,9}},194},
|
|
{{{80,7}},10}, {{{0,8}},97}, {{{0,8}},33}, {{{0,9}},162},
|
|
{{{0,8}},1}, {{{0,8}},129}, {{{0,8}},65}, {{{0,9}},226},
|
|
{{{80,7}},6}, {{{0,8}},89}, {{{0,8}},25}, {{{0,9}},146},
|
|
{{{83,7}},59}, {{{0,8}},121}, {{{0,8}},57}, {{{0,9}},210},
|
|
{{{81,7}},17}, {{{0,8}},105}, {{{0,8}},41}, {{{0,9}},178},
|
|
{{{0,8}},9}, {{{0,8}},137}, {{{0,8}},73}, {{{0,9}},242},
|
|
{{{80,7}},4}, {{{0,8}},85}, {{{0,8}},21}, {{{80,8}},258},
|
|
{{{83,7}},43}, {{{0,8}},117}, {{{0,8}},53}, {{{0,9}},202},
|
|
{{{81,7}},13}, {{{0,8}},101}, {{{0,8}},37}, {{{0,9}},170},
|
|
{{{0,8}},5}, {{{0,8}},133}, {{{0,8}},69}, {{{0,9}},234},
|
|
{{{80,7}},8}, {{{0,8}},93}, {{{0,8}},29}, {{{0,9}},154},
|
|
{{{84,7}},83}, {{{0,8}},125}, {{{0,8}},61}, {{{0,9}},218},
|
|
{{{82,7}},23}, {{{0,8}},109}, {{{0,8}},45}, {{{0,9}},186},
|
|
{{{0,8}},13}, {{{0,8}},141}, {{{0,8}},77}, {{{0,9}},250},
|
|
{{{80,7}},3}, {{{0,8}},83}, {{{0,8}},19}, {{{85,8}},195},
|
|
{{{83,7}},35}, {{{0,8}},115}, {{{0,8}},51}, {{{0,9}},198},
|
|
{{{81,7}},11}, {{{0,8}},99}, {{{0,8}},35}, {{{0,9}},166},
|
|
{{{0,8}},3}, {{{0,8}},131}, {{{0,8}},67}, {{{0,9}},230},
|
|
{{{80,7}},7}, {{{0,8}},91}, {{{0,8}},27}, {{{0,9}},150},
|
|
{{{84,7}},67}, {{{0,8}},123}, {{{0,8}},59}, {{{0,9}},214},
|
|
{{{82,7}},19}, {{{0,8}},107}, {{{0,8}},43}, {{{0,9}},182},
|
|
{{{0,8}},11}, {{{0,8}},139}, {{{0,8}},75}, {{{0,9}},246},
|
|
{{{80,7}},5}, {{{0,8}},87}, {{{0,8}},23}, {{{192,8}},0},
|
|
{{{83,7}},51}, {{{0,8}},119}, {{{0,8}},55}, {{{0,9}},206},
|
|
{{{81,7}},15}, {{{0,8}},103}, {{{0,8}},39}, {{{0,9}},174},
|
|
{{{0,8}},7}, {{{0,8}},135}, {{{0,8}},71}, {{{0,9}},238},
|
|
{{{80,7}},9}, {{{0,8}},95}, {{{0,8}},31}, {{{0,9}},158},
|
|
{{{84,7}},99}, {{{0,8}},127}, {{{0,8}},63}, {{{0,9}},222},
|
|
{{{82,7}},27}, {{{0,8}},111}, {{{0,8}},47}, {{{0,9}},190},
|
|
{{{0,8}},15}, {{{0,8}},143}, {{{0,8}},79}, {{{0,9}},254},
|
|
{{{96,7}},256}, {{{0,8}},80}, {{{0,8}},16}, {{{84,8}},115},
|
|
{{{82,7}},31}, {{{0,8}},112}, {{{0,8}},48}, {{{0,9}},193},
|
|
{{{80,7}},10}, {{{0,8}},96}, {{{0,8}},32}, {{{0,9}},161},
|
|
{{{0,8}},0}, {{{0,8}},128}, {{{0,8}},64}, {{{0,9}},225},
|
|
{{{80,7}},6}, {{{0,8}},88}, {{{0,8}},24}, {{{0,9}},145},
|
|
{{{83,7}},59}, {{{0,8}},120}, {{{0,8}},56}, {{{0,9}},209},
|
|
{{{81,7}},17}, {{{0,8}},104}, {{{0,8}},40}, {{{0,9}},177},
|
|
{{{0,8}},8}, {{{0,8}},136}, {{{0,8}},72}, {{{0,9}},241},
|
|
{{{80,7}},4}, {{{0,8}},84}, {{{0,8}},20}, {{{85,8}},227},
|
|
{{{83,7}},43}, {{{0,8}},116}, {{{0,8}},52}, {{{0,9}},201},
|
|
{{{81,7}},13}, {{{0,8}},100}, {{{0,8}},36}, {{{0,9}},169},
|
|
{{{0,8}},4}, {{{0,8}},132}, {{{0,8}},68}, {{{0,9}},233},
|
|
{{{80,7}},8}, {{{0,8}},92}, {{{0,8}},28}, {{{0,9}},153},
|
|
{{{84,7}},83}, {{{0,8}},124}, {{{0,8}},60}, {{{0,9}},217},
|
|
{{{82,7}},23}, {{{0,8}},108}, {{{0,8}},44}, {{{0,9}},185},
|
|
{{{0,8}},12}, {{{0,8}},140}, {{{0,8}},76}, {{{0,9}},249},
|
|
{{{80,7}},3}, {{{0,8}},82}, {{{0,8}},18}, {{{85,8}},163},
|
|
{{{83,7}},35}, {{{0,8}},114}, {{{0,8}},50}, {{{0,9}},197},
|
|
{{{81,7}},11}, {{{0,8}},98}, {{{0,8}},34}, {{{0,9}},165},
|
|
{{{0,8}},2}, {{{0,8}},130}, {{{0,8}},66}, {{{0,9}},229},
|
|
{{{80,7}},7}, {{{0,8}},90}, {{{0,8}},26}, {{{0,9}},149},
|
|
{{{84,7}},67}, {{{0,8}},122}, {{{0,8}},58}, {{{0,9}},213},
|
|
{{{82,7}},19}, {{{0,8}},106}, {{{0,8}},42}, {{{0,9}},181},
|
|
{{{0,8}},10}, {{{0,8}},138}, {{{0,8}},74}, {{{0,9}},245},
|
|
{{{80,7}},5}, {{{0,8}},86}, {{{0,8}},22}, {{{192,8}},0},
|
|
{{{83,7}},51}, {{{0,8}},118}, {{{0,8}},54}, {{{0,9}},205},
|
|
{{{81,7}},15}, {{{0,8}},102}, {{{0,8}},38}, {{{0,9}},173},
|
|
{{{0,8}},6}, {{{0,8}},134}, {{{0,8}},70}, {{{0,9}},237},
|
|
{{{80,7}},9}, {{{0,8}},94}, {{{0,8}},30}, {{{0,9}},157},
|
|
{{{84,7}},99}, {{{0,8}},126}, {{{0,8}},62}, {{{0,9}},221},
|
|
{{{82,7}},27}, {{{0,8}},110}, {{{0,8}},46}, {{{0,9}},189},
|
|
{{{0,8}},14}, {{{0,8}},142}, {{{0,8}},78}, {{{0,9}},253},
|
|
{{{96,7}},256}, {{{0,8}},81}, {{{0,8}},17}, {{{85,8}},131},
|
|
{{{82,7}},31}, {{{0,8}},113}, {{{0,8}},49}, {{{0,9}},195},
|
|
{{{80,7}},10}, {{{0,8}},97}, {{{0,8}},33}, {{{0,9}},163},
|
|
{{{0,8}},1}, {{{0,8}},129}, {{{0,8}},65}, {{{0,9}},227},
|
|
{{{80,7}},6}, {{{0,8}},89}, {{{0,8}},25}, {{{0,9}},147},
|
|
{{{83,7}},59}, {{{0,8}},121}, {{{0,8}},57}, {{{0,9}},211},
|
|
{{{81,7}},17}, {{{0,8}},105}, {{{0,8}},41}, {{{0,9}},179},
|
|
{{{0,8}},9}, {{{0,8}},137}, {{{0,8}},73}, {{{0,9}},243},
|
|
{{{80,7}},4}, {{{0,8}},85}, {{{0,8}},21}, {{{80,8}},258},
|
|
{{{83,7}},43}, {{{0,8}},117}, {{{0,8}},53}, {{{0,9}},203},
|
|
{{{81,7}},13}, {{{0,8}},101}, {{{0,8}},37}, {{{0,9}},171},
|
|
{{{0,8}},5}, {{{0,8}},133}, {{{0,8}},69}, {{{0,9}},235},
|
|
{{{80,7}},8}, {{{0,8}},93}, {{{0,8}},29}, {{{0,9}},155},
|
|
{{{84,7}},83}, {{{0,8}},125}, {{{0,8}},61}, {{{0,9}},219},
|
|
{{{82,7}},23}, {{{0,8}},109}, {{{0,8}},45}, {{{0,9}},187},
|
|
{{{0,8}},13}, {{{0,8}},141}, {{{0,8}},77}, {{{0,9}},251},
|
|
{{{80,7}},3}, {{{0,8}},83}, {{{0,8}},19}, {{{85,8}},195},
|
|
{{{83,7}},35}, {{{0,8}},115}, {{{0,8}},51}, {{{0,9}},199},
|
|
{{{81,7}},11}, {{{0,8}},99}, {{{0,8}},35}, {{{0,9}},167},
|
|
{{{0,8}},3}, {{{0,8}},131}, {{{0,8}},67}, {{{0,9}},231},
|
|
{{{80,7}},7}, {{{0,8}},91}, {{{0,8}},27}, {{{0,9}},151},
|
|
{{{84,7}},67}, {{{0,8}},123}, {{{0,8}},59}, {{{0,9}},215},
|
|
{{{82,7}},19}, {{{0,8}},107}, {{{0,8}},43}, {{{0,9}},183},
|
|
{{{0,8}},11}, {{{0,8}},139}, {{{0,8}},75}, {{{0,9}},247},
|
|
{{{80,7}},5}, {{{0,8}},87}, {{{0,8}},23}, {{{192,8}},0},
|
|
{{{83,7}},51}, {{{0,8}},119}, {{{0,8}},55}, {{{0,9}},207},
|
|
{{{81,7}},15}, {{{0,8}},103}, {{{0,8}},39}, {{{0,9}},175},
|
|
{{{0,8}},7}, {{{0,8}},135}, {{{0,8}},71}, {{{0,9}},239},
|
|
{{{80,7}},9}, {{{0,8}},95}, {{{0,8}},31}, {{{0,9}},159},
|
|
{{{84,7}},99}, {{{0,8}},127}, {{{0,8}},63}, {{{0,9}},223},
|
|
{{{82,7}},27}, {{{0,8}},111}, {{{0,8}},47}, {{{0,9}},191},
|
|
{{{0,8}},15}, {{{0,8}},143}, {{{0,8}},79}, {{{0,9}},255}
|
|
};
|
|
static inflate_huft fixed_td[] = {
|
|
{{{80,5}},1}, {{{87,5}},257}, {{{83,5}},17}, {{{91,5}},4097},
|
|
{{{81,5}},5}, {{{89,5}},1025}, {{{85,5}},65}, {{{93,5}},16385},
|
|
{{{80,5}},3}, {{{88,5}},513}, {{{84,5}},33}, {{{92,5}},8193},
|
|
{{{82,5}},9}, {{{90,5}},2049}, {{{86,5}},129}, {{{192,5}},24577},
|
|
{{{80,5}},2}, {{{87,5}},385}, {{{83,5}},25}, {{{91,5}},6145},
|
|
{{{81,5}},7}, {{{89,5}},1537}, {{{85,5}},97}, {{{93,5}},24577},
|
|
{{{80,5}},4}, {{{88,5}},769}, {{{84,5}},49}, {{{92,5}},12289},
|
|
{{{82,5}},13}, {{{90,5}},3073}, {{{86,5}},193}, {{{192,5}},24577}
|
|
};
|
|
|
|
int inflate_trees_fixed(uInt *bl, uInt *bd, inflate_huft * *tl, inflate_huft * *td, z_streamp z)
|
|
//uInt *bl; /* literal desired/actual bit depth */
|
|
//uInt *bd; /* distance desired/actual bit depth */
|
|
//inflate_huft * *tl; /* literal/length tree result */
|
|
//inflate_huft * *td; /* distance tree result */
|
|
//z_streamp z; /* for memory allocation */
|
|
{
|
|
*bl = fixed_bl;
|
|
*bd = fixed_bd;
|
|
*tl = fixed_tl;
|
|
*td = fixed_td;
|
|
return Z_OK;
|
|
}
|
|
|
|
/* simplify the use of the inflate_huft type with some defines */
|
|
#define exop word.what.Exop
|
|
#define bits word.what.Bits
|
|
|
|
/* macros for bit input with no checking and for returning unused bytes */
|
|
#define GRABBITS(j) {while(k<(j)){b|=((uLong)NEXTBYTE)<<k;k+=8;}}
|
|
#define UNGRAB {c=z->avail_in-n;c=(k>>3)<c?k>>3:c;n+=c;p-=c;k-=c<<3;}
|
|
|
|
/* Called with number of bytes left to write in window at least 258
|
|
(the maximum string length) and number of input bytes available
|
|
at least ten. The ten bytes are six bytes for the longest length/
|
|
distance pair plus four bytes for overloading the bit buffer. */
|
|
|
|
int inflate_fast(uInt bl, uInt bd, inflate_huft *tl, inflate_huft *td, inflate_blocks_statef *s, z_streamp z)
|
|
{
|
|
inflate_huft *t; /* temporary pointer */
|
|
uInt e; /* extra bits or operation */
|
|
uLong b; /* bit buffer */
|
|
uInt k; /* bits in bit buffer */
|
|
Byte *p; /* input data pointer */
|
|
uInt n; /* bytes available there */
|
|
Byte *q; /* output window write pointer */
|
|
uInt m; /* bytes to end of window or read pointer */
|
|
uInt ml; /* mask for literal/length tree */
|
|
uInt md; /* mask for distance tree */
|
|
uInt c; /* bytes to copy */
|
|
uInt d; /* distance back to copy from */
|
|
Byte *r; /* copy source pointer */
|
|
|
|
/* load input, output, bit values */
|
|
LOAD
|
|
|
|
/* initialize masks */
|
|
ml = inflate_mask[bl];
|
|
md = inflate_mask[bd];
|
|
|
|
/* do until not enough input or output space for fast loop */
|
|
do { /* assume called with m >= 258 && n >= 10 */
|
|
/* get literal/length code */
|
|
GRABBITS(20) /* max bits for literal/length code */
|
|
if ((e = (t = tl + ((uInt)b & ml))->exop) == 0)
|
|
{
|
|
DUMPBITS(t->bits)
|
|
Tracevv((t->base >= 0x20 && t->base < 0x7f ?
|
|
"inflate: * literal '%c'\n" :
|
|
"inflate: * literal 0x%02x\n", t->base));
|
|
*q++ = (Byte)t->base;
|
|
m--;
|
|
continue;
|
|
}
|
|
do {
|
|
DUMPBITS(t->bits)
|
|
if (e & 16)
|
|
{
|
|
/* get extra bits for length */
|
|
e &= 15;
|
|
c = t->base + ((uInt)b & inflate_mask[e]);
|
|
DUMPBITS(e)
|
|
Tracevv(("inflate: * length %u\n", c));
|
|
|
|
/* decode distance base of block to copy */
|
|
GRABBITS(15); /* max bits for distance code */
|
|
e = (t = td + ((uInt)b & md))->exop;
|
|
do {
|
|
DUMPBITS(t->bits)
|
|
if (e & 16)
|
|
{
|
|
/* get extra bits to add to distance base */
|
|
e &= 15;
|
|
GRABBITS(e) /* get extra bits (up to 13) */
|
|
d = t->base + ((uInt)b & inflate_mask[e]);
|
|
DUMPBITS(e)
|
|
Tracevv(("inflate: * distance %u\n", d));
|
|
|
|
/* do the copy */
|
|
m -= c;
|
|
if ((uInt)(q - s->window) >= d) /* offset before dest */
|
|
{ /* just copy */
|
|
r = q - d;
|
|
*q++ = *r++; c--; /* minimum count is three, */
|
|
*q++ = *r++; c--; /* so unroll loop a little */
|
|
}
|
|
else /* else offset after destination */
|
|
{
|
|
e = d - (uInt)(q - s->window); /* bytes from offset to end */
|
|
r = s->end - e; /* pointer to offset */
|
|
if (c > e) /* if source crosses, */
|
|
{
|
|
c -= e; /* copy to end of window */
|
|
do {
|
|
*q++ = *r++;
|
|
} while (--e);
|
|
r = s->window; /* copy rest from start of window */
|
|
}
|
|
}
|
|
do { /* copy all or what's left */
|
|
*q++ = *r++;
|
|
} while (--c);
|
|
break;
|
|
}
|
|
else if ((e & 64) == 0)
|
|
{
|
|
t += t->base;
|
|
e = (t += ((uInt)b & inflate_mask[e]))->exop;
|
|
}
|
|
else
|
|
{
|
|
z->msg = (char*)"invalid distance code";
|
|
UNGRAB
|
|
UPDATE
|
|
return Z_DATA_ERROR;
|
|
}
|
|
} while (1);
|
|
break;
|
|
}
|
|
if ((e & 64) == 0)
|
|
{
|
|
t += t->base;
|
|
if ((e = (t += ((uInt)b & inflate_mask[e]))->exop) == 0)
|
|
{
|
|
DUMPBITS(t->bits)
|
|
Tracevv((t->base >= 0x20 && t->base < 0x7f ?
|
|
"inflate: * literal '%c'\n" :
|
|
"inflate: * literal 0x%02x\n", t->base));
|
|
*q++ = (Byte)t->base;
|
|
m--;
|
|
break;
|
|
}
|
|
}
|
|
else if (e & 32)
|
|
{
|
|
Tracevv(("inflate: * end of block\n"));
|
|
UNGRAB
|
|
UPDATE
|
|
return Z_STREAM_END;
|
|
}
|
|
else
|
|
{
|
|
z->msg = (char*)"invalid literal/length code";
|
|
UNGRAB
|
|
UPDATE
|
|
return Z_DATA_ERROR;
|
|
}
|
|
} while (1);
|
|
} while (m >= 258 && n >= 10);
|
|
|
|
/* not enough input or output--restore pointers and return */
|
|
UNGRAB
|
|
UPDATE
|
|
return Z_OK;
|
|
}
|
|
|
|
/* infcodes.c -- process literals and length/distance pairs
|
|
* Copyright (C) 1995-1998 Mark Adler
|
|
* For conditions of distribution and use, see copyright notice in zlib.h
|
|
*/
|
|
|
|
/* simplify the use of the inflate_huft type with some defines */
|
|
#define exop word.what.Exop
|
|
#define bits word.what.Bits
|
|
|
|
typedef enum { /* waiting for "i:"=input, "o:"=output, "x:"=nothing */
|
|
START, /* x: set up for LEN */
|
|
LEN, /* i: get length/literal/eob next */
|
|
LENEXT, /* i: getting length extra (have base) */
|
|
DIST, /* i: get distance next */
|
|
DISTEXT, /* i: getting distance extra */
|
|
COPY, /* o: copying bytes in window, waiting for space */
|
|
LIT, /* o: got literal, waiting for output space */
|
|
WASH, /* o: got eob, possibly still output waiting */
|
|
END, /* x: got eob and all data flushed */
|
|
BADCODE} /* x: got error */
|
|
inflate_codes_mode;
|
|
|
|
/* inflate codes private state */
|
|
struct inflate_codes_state {
|
|
|
|
/* mode */
|
|
inflate_codes_mode mode; /* current inflate_codes mode */
|
|
|
|
/* mode dependent information */
|
|
uInt len;
|
|
union {
|
|
struct {
|
|
inflate_huft *tree; /* pointer into tree */
|
|
uInt need; /* bits needed */
|
|
} code; /* if LEN or DIST, where in tree */
|
|
uInt lit; /* if LIT, literal */
|
|
struct {
|
|
uInt get; /* bits to get for extra */
|
|
uInt dist; /* distance back to copy from */
|
|
} copy; /* if EXT or COPY, where and how much */
|
|
} sub; /* submode */
|
|
|
|
/* mode independent information */
|
|
Byte lbits; /* ltree bits decoded per branch */
|
|
Byte dbits; /* dtree bits decoder per branch */
|
|
inflate_huft *ltree; /* literal/length/eob tree */
|
|
inflate_huft *dtree; /* distance tree */
|
|
|
|
};
|
|
|
|
|
|
inflate_codes_statef *inflate_codes_new(uInt bl, uInt bd, inflate_huft *tl, inflate_huft *td, z_streamp z)
|
|
{
|
|
inflate_codes_statef *c;
|
|
|
|
if ((c = (inflate_codes_statef *)
|
|
ZALLOC(z,1,sizeof(struct inflate_codes_state))) != Z_NULL)
|
|
{
|
|
c->mode = START;
|
|
c->lbits = (Byte)bl;
|
|
c->dbits = (Byte)bd;
|
|
c->ltree = tl;
|
|
c->dtree = td;
|
|
Tracev(("inflate: codes new\n"));
|
|
}
|
|
return c;
|
|
}
|
|
|
|
|
|
int inflate_codes(inflate_blocks_statef *s, z_streamp z, int r)
|
|
{
|
|
uInt j; /* temporary storage */
|
|
inflate_huft *t; /* temporary pointer */
|
|
uInt e; /* extra bits or operation */
|
|
uLong b; /* bit buffer */
|
|
uInt k; /* bits in bit buffer */
|
|
Byte *p; /* input data pointer */
|
|
uInt n; /* bytes available there */
|
|
Byte *q; /* output window write pointer */
|
|
uInt m; /* bytes to end of window or read pointer */
|
|
Byte *f; /* pointer to copy strings from */
|
|
inflate_codes_statef *c = s->sub.decode.codes; /* codes state */
|
|
|
|
/* copy input/output information to locals (UPDATE macro restores) */
|
|
LOAD
|
|
|
|
/* process input and output based on current state */
|
|
while (1) switch (c->mode)
|
|
{ /* waiting for "i:"=input, "o:"=output, "x:"=nothing */
|
|
case START: /* x: set up for LEN */
|
|
#ifndef SLOW
|
|
if (m >= 258 && n >= 10)
|
|
{
|
|
UPDATE
|
|
r = inflate_fast(c->lbits, c->dbits, c->ltree, c->dtree, s, z);
|
|
LOAD
|
|
if (r != Z_OK)
|
|
{
|
|
c->mode = r == Z_STREAM_END ? WASH : BADCODE;
|
|
break;
|
|
}
|
|
}
|
|
#endif /* !SLOW */
|
|
c->sub.code.need = c->lbits;
|
|
c->sub.code.tree = c->ltree;
|
|
c->mode = LEN;
|
|
case LEN: /* i: get length/literal/eob next */
|
|
j = c->sub.code.need;
|
|
NEEDBITS(j)
|
|
t = c->sub.code.tree + ((uInt)b & inflate_mask[j]);
|
|
DUMPBITS(t->bits)
|
|
e = (uInt)(t->exop);
|
|
if (e == 0) /* literal */
|
|
{
|
|
c->sub.lit = t->base;
|
|
Tracevv((t->base >= 0x20 && t->base < 0x7f ?
|
|
"inflate: literal '%c'\n" :
|
|
"inflate: literal 0x%02x\n", t->base));
|
|
c->mode = LIT;
|
|
break;
|
|
}
|
|
if (e & 16) /* length */
|
|
{
|
|
c->sub.copy.get = e & 15;
|
|
c->len = t->base;
|
|
c->mode = LENEXT;
|
|
break;
|
|
}
|
|
if ((e & 64) == 0) /* next table */
|
|
{
|
|
c->sub.code.need = e;
|
|
c->sub.code.tree = t + t->base;
|
|
break;
|
|
}
|
|
if (e & 32) /* end of block */
|
|
{
|
|
Tracevv(("inflate: end of block\n"));
|
|
c->mode = WASH;
|
|
break;
|
|
}
|
|
c->mode = BADCODE; /* invalid code */
|
|
z->msg = (char*)"invalid literal/length code";
|
|
r = Z_DATA_ERROR;
|
|
LEAVE
|
|
case LENEXT: /* i: getting length extra (have base) */
|
|
j = c->sub.copy.get;
|
|
NEEDBITS(j)
|
|
c->len += (uInt)b & inflate_mask[j];
|
|
DUMPBITS(j)
|
|
c->sub.code.need = c->dbits;
|
|
c->sub.code.tree = c->dtree;
|
|
Tracevv(("inflate: length %u\n", c->len));
|
|
c->mode = DIST;
|
|
case DIST: /* i: get distance next */
|
|
j = c->sub.code.need;
|
|
NEEDBITS(j)
|
|
t = c->sub.code.tree + ((uInt)b & inflate_mask[j]);
|
|
DUMPBITS(t->bits)
|
|
e = (uInt)(t->exop);
|
|
if (e & 16) /* distance */
|
|
{
|
|
c->sub.copy.get = e & 15;
|
|
c->sub.copy.dist = t->base;
|
|
c->mode = DISTEXT;
|
|
break;
|
|
}
|
|
if ((e & 64) == 0) /* next table */
|
|
{
|
|
c->sub.code.need = e;
|
|
c->sub.code.tree = t + t->base;
|
|
break;
|
|
}
|
|
c->mode = BADCODE; /* invalid code */
|
|
z->msg = (char*)"invalid distance code";
|
|
r = Z_DATA_ERROR;
|
|
LEAVE
|
|
case DISTEXT: /* i: getting distance extra */
|
|
j = c->sub.copy.get;
|
|
NEEDBITS(j)
|
|
c->sub.copy.dist += (uInt)b & inflate_mask[j];
|
|
DUMPBITS(j)
|
|
Tracevv(("inflate: distance %u\n", c->sub.copy.dist));
|
|
c->mode = COPY;
|
|
case COPY: /* o: copying bytes in window, waiting for space */
|
|
#ifndef __TURBOC__ /* Turbo C bug for following expression */
|
|
f = (uInt)(q - s->window) < c->sub.copy.dist ?
|
|
s->end - (c->sub.copy.dist - (q - s->window)) :
|
|
q - c->sub.copy.dist;
|
|
#else
|
|
f = q - c->sub.copy.dist;
|
|
if ((uInt)(q - s->window) < c->sub.copy.dist)
|
|
f = s->end - (c->sub.copy.dist - (uInt)(q - s->window));
|
|
#endif
|
|
while (c->len)
|
|
{
|
|
NEEDOUT
|
|
OUTBYTE(*f++)
|
|
if (f == s->end)
|
|
f = s->window;
|
|
c->len--;
|
|
}
|
|
c->mode = START;
|
|
break;
|
|
case LIT: /* o: got literal, waiting for output space */
|
|
NEEDOUT
|
|
OUTBYTE(c->sub.lit)
|
|
c->mode = START;
|
|
break;
|
|
case WASH: /* o: got eob, possibly more output */
|
|
if (k > 7) /* return unused byte, if any */
|
|
{
|
|
Assert(k < 16, "inflate_codes grabbed too many bytes")
|
|
k -= 8;
|
|
n++;
|
|
p--; /* can always return one */
|
|
}
|
|
FLUSH
|
|
if (s->read != s->write)
|
|
LEAVE
|
|
c->mode = END;
|
|
case END:
|
|
r = Z_STREAM_END;
|
|
LEAVE
|
|
case BADCODE: /* x: got error */
|
|
r = Z_DATA_ERROR;
|
|
LEAVE
|
|
default:
|
|
r = Z_STREAM_ERROR;
|
|
LEAVE
|
|
}
|
|
#ifdef NEED_DUMMY_RETURN
|
|
return Z_STREAM_ERROR; /* Some dumb compilers complain without this */
|
|
#endif
|
|
}
|
|
|
|
|
|
void inflate_codes_free(inflate_codes_statef *c, z_streamp z)
|
|
{
|
|
ZFREE(z, c);
|
|
Tracev(("inflate: codes free\n"));
|
|
}
|
|
|
|
/* adler32.c -- compute the Adler-32 checksum of a data stream
|
|
* Copyright (C) 1995-1998 Mark Adler
|
|
* For conditions of distribution and use, see copyright notice in zlib.h
|
|
*/
|
|
|
|
#define BASE 65521L /* largest prime smaller than 65536 */
|
|
#define NMAX 5552
|
|
/* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
|
|
|
|
#undef DO1
|
|
#undef DO2
|
|
#undef DO4
|
|
#undef DO8
|
|
|
|
#define DO1(buf,i) {s1 += buf[i]; s2 += s1;}
|
|
#define DO2(buf,i) DO1(buf,i); DO1(buf,i+1);
|
|
#define DO4(buf,i) DO2(buf,i); DO2(buf,i+2);
|
|
#define DO8(buf,i) DO4(buf,i); DO4(buf,i+4);
|
|
#define DO16(buf) DO8(buf,0); DO8(buf,8);
|
|
|
|
/* ========================================================================= */
|
|
uLong adler32(uLong adler, const Byte *buf, uInt len)
|
|
{
|
|
unsigned long s1 = adler & 0xffff;
|
|
unsigned long s2 = (adler >> 16) & 0xffff;
|
|
int k;
|
|
|
|
if (buf == Z_NULL) return 1L;
|
|
|
|
while (len > 0) {
|
|
k = len < NMAX ? len : NMAX;
|
|
len -= k;
|
|
while (k >= 16) {
|
|
DO16(buf);
|
|
buf += 16;
|
|
k -= 16;
|
|
}
|
|
if (k != 0) do {
|
|
s1 += *buf++;
|
|
s2 += s1;
|
|
} while (--k);
|
|
s1 %= BASE;
|
|
s2 %= BASE;
|
|
}
|
|
return (s2 << 16) | s1;
|
|
}
|
|
|
|
/* @(#) $Id: unzip.c,v 1.2 1999/09/07 20:51:25 zoid Exp $ */
|
|
|
|
/* infblock.h -- header to use infblock.c
|
|
* Copyright (C) 1995-1998 Mark Adler
|
|
* For conditions of distribution and use, see copyright notice in zlib.h
|
|
*/
|
|
|
|
/* WARNING: this file should *not* be used by applications. It is
|
|
part of the implementation of the compression library and is
|
|
subject to change. Applications should only use zlib.h.
|
|
*/
|
|
|
|
extern inflate_blocks_statef * inflate_blocks_new OF((
|
|
z_streamp z,
|
|
check_func c, /* check function */
|
|
uInt w)); /* window size */
|
|
|
|
extern int inflate_blocks OF((
|
|
inflate_blocks_statef *,
|
|
z_streamp ,
|
|
int)); /* initial return code */
|
|
|
|
extern void inflate_blocks_reset OF((
|
|
inflate_blocks_statef *,
|
|
z_streamp ,
|
|
uLong *)); /* check value on output */
|
|
|
|
extern int inflate_blocks_free OF((
|
|
inflate_blocks_statef *,
|
|
z_streamp));
|
|
|
|
extern void inflate_set_dictionary OF((
|
|
inflate_blocks_statef *s,
|
|
const Byte *d, /* dictionary */
|
|
uInt n)); /* dictionary length */
|
|
|
|
extern int inflate_blocks_sync_point OF((
|
|
inflate_blocks_statef *s));
|
|
|
|
typedef enum {
|
|
imMETHOD, /* waiting for method byte */
|
|
imFLAG, /* waiting for flag byte */
|
|
imDICT4, /* four dictionary check bytes to go */
|
|
imDICT3, /* three dictionary check bytes to go */
|
|
imDICT2, /* two dictionary check bytes to go */
|
|
imDICT1, /* one dictionary check byte to go */
|
|
imDICT0, /* waiting for inflateSetDictionary */
|
|
imBLOCKS, /* decompressing blocks */
|
|
imCHECK4, /* four check bytes to go */
|
|
imCHECK3, /* three check bytes to go */
|
|
imCHECK2, /* two check bytes to go */
|
|
imCHECK1, /* one check byte to go */
|
|
imDONE, /* finished check, done */
|
|
imBAD} /* got an error--stay here */
|
|
inflate_mode;
|
|
|
|
/* inflate private state */
|
|
struct internal_state {
|
|
|
|
/* mode */
|
|
inflate_mode mode; /* current inflate mode */
|
|
|
|
/* mode dependent information */
|
|
union {
|
|
uInt method; /* if FLAGS, method byte */
|
|
struct {
|
|
uLong was; /* computed check value */
|
|
uLong need; /* stream check value */
|
|
} check; /* if CHECK, check values to compare */
|
|
uInt marker; /* if BAD, inflateSync's marker bytes count */
|
|
} sub; /* submode */
|
|
|
|
/* mode independent information */
|
|
int nowrap; /* flag for no wrapper */
|
|
uInt wbits; /* log2(window size) (8..15, defaults to 15) */
|
|
inflate_blocks_statef
|
|
*blocks; /* current inflate_blocks state */
|
|
|
|
};
|
|
|
|
|
|
int inflateReset(z_streamp z)
|
|
{
|
|
if (z == Z_NULL || z->state == Z_NULL)
|
|
return Z_STREAM_ERROR;
|
|
z->total_in = z->total_out = 0;
|
|
z->msg = Z_NULL;
|
|
z->state->mode = z->state->nowrap ? imBLOCKS : imMETHOD;
|
|
inflate_blocks_reset(z->state->blocks, z, Z_NULL);
|
|
Tracev(("inflate: reset\n"));
|
|
return Z_OK;
|
|
}
|
|
|
|
|
|
int inflateEnd(z_streamp z)
|
|
{
|
|
if (z == Z_NULL || z->state == Z_NULL || z->zfree == Z_NULL)
|
|
return Z_STREAM_ERROR;
|
|
if (z->state->blocks != Z_NULL)
|
|
inflate_blocks_free(z->state->blocks, z);
|
|
ZFREE(z, z->state);
|
|
z->state = Z_NULL;
|
|
Tracev(("inflate: end\n"));
|
|
return Z_OK;
|
|
}
|
|
|
|
|
|
|
|
int inflateInit2_(z_streamp z, int w, const char *version, int stream_size)
|
|
{
|
|
if (version == Z_NULL || version[0] != ZLIB_VERSION[0] ||
|
|
stream_size != sizeof(z_stream))
|
|
return Z_VERSION_ERROR;
|
|
|
|
/* initialize state */
|
|
if (z == Z_NULL)
|
|
return Z_STREAM_ERROR;
|
|
z->msg = Z_NULL;
|
|
if (z->zalloc == Z_NULL)
|
|
{
|
|
z->zalloc = (void *(*)(void *, unsigned, unsigned))zcalloc;
|
|
z->opaque = (voidp)0;
|
|
}
|
|
if (z->zfree == Z_NULL) z->zfree = (void (*)(void *, void *))zcfree;
|
|
if ((z->state = (struct internal_state *)
|
|
ZALLOC(z,1,sizeof(struct internal_state))) == Z_NULL)
|
|
return Z_MEM_ERROR;
|
|
z->state->blocks = Z_NULL;
|
|
|
|
/* handle undocumented nowrap option (no zlib header or check) */
|
|
z->state->nowrap = 0;
|
|
if (w < 0)
|
|
{
|
|
w = - w;
|
|
z->state->nowrap = 1;
|
|
}
|
|
|
|
/* set window size */
|
|
if (w < 8 || w > 15)
|
|
{
|
|
inflateEnd(z);
|
|
return Z_STREAM_ERROR;
|
|
}
|
|
z->state->wbits = (uInt)w;
|
|
|
|
/* create inflate_blocks state */
|
|
if ((z->state->blocks =
|
|
inflate_blocks_new(z, z->state->nowrap ? Z_NULL : adler32, (uInt)1 << w))
|
|
== Z_NULL)
|
|
{
|
|
inflateEnd(z);
|
|
return Z_MEM_ERROR;
|
|
}
|
|
Tracev(("inflate: allocated\n"));
|
|
|
|
/* reset state */
|
|
inflateReset(z);
|
|
return Z_OK;
|
|
}
|
|
|
|
|
|
int inflateInit_(z_streamp z, const char *version, int stream_size)
|
|
{
|
|
return inflateInit2_(z, DEF_WBITS, version, stream_size);
|
|
}
|
|
|
|
|
|
#define iNEEDBYTE {if(z->avail_in==0)return r;r=f;}
|
|
#define iNEXTBYTE (z->avail_in--,z->total_in++,*z->next_in++)
|
|
|
|
int inflate(z_streamp z, int f)
|
|
{
|
|
int r;
|
|
uInt b;
|
|
|
|
if (z == Z_NULL || z->state == Z_NULL || z->next_in == Z_NULL)
|
|
return Z_STREAM_ERROR;
|
|
f = f == Z_FINISH ? Z_BUF_ERROR : Z_OK;
|
|
r = Z_BUF_ERROR;
|
|
while (1) switch (z->state->mode)
|
|
{
|
|
case imMETHOD:
|
|
iNEEDBYTE
|
|
if (((z->state->sub.method = iNEXTBYTE) & 0xf) != Z_DEFLATED)
|
|
{
|
|
z->state->mode = imBAD;
|
|
z->msg = (char*)"unknown compression method";
|
|
z->state->sub.marker = 5; /* can't try inflateSync */
|
|
break;
|
|
}
|
|
if ((z->state->sub.method >> 4) + 8 > z->state->wbits)
|
|
{
|
|
z->state->mode = imBAD;
|
|
z->msg = (char*)"invalid window size";
|
|
z->state->sub.marker = 5; /* can't try inflateSync */
|
|
break;
|
|
}
|
|
z->state->mode = imFLAG;
|
|
case imFLAG:
|
|
iNEEDBYTE
|
|
b = iNEXTBYTE;
|
|
if (((z->state->sub.method << 8) + b) % 31)
|
|
{
|
|
z->state->mode = imBAD;
|
|
z->msg = (char*)"incorrect header check";
|
|
z->state->sub.marker = 5; /* can't try inflateSync */
|
|
break;
|
|
}
|
|
Tracev(("inflate: zlib header ok\n"));
|
|
if (!(b & PRESET_DICT))
|
|
{
|
|
z->state->mode = imBLOCKS;
|
|
break;
|
|
}
|
|
z->state->mode = imDICT4;
|
|
case imDICT4:
|
|
iNEEDBYTE
|
|
z->state->sub.check.need = (uLong)iNEXTBYTE << 24;
|
|
z->state->mode = imDICT3;
|
|
case imDICT3:
|
|
iNEEDBYTE
|
|
z->state->sub.check.need += (uLong)iNEXTBYTE << 16;
|
|
z->state->mode = imDICT2;
|
|
case imDICT2:
|
|
iNEEDBYTE
|
|
z->state->sub.check.need += (uLong)iNEXTBYTE << 8;
|
|
z->state->mode = imDICT1;
|
|
case imDICT1:
|
|
iNEEDBYTE
|
|
z->state->sub.check.need += (uLong)iNEXTBYTE;
|
|
z->adler = z->state->sub.check.need;
|
|
z->state->mode = imDICT0;
|
|
return Z_NEED_DICT;
|
|
case imDICT0:
|
|
z->state->mode = imBAD;
|
|
z->msg = (char*)"need dictionary";
|
|
z->state->sub.marker = 0; /* can try inflateSync */
|
|
return Z_STREAM_ERROR;
|
|
case imBLOCKS:
|
|
r = inflate_blocks(z->state->blocks, z, r);
|
|
if (r == Z_DATA_ERROR)
|
|
{
|
|
z->state->mode = imBAD;
|
|
z->state->sub.marker = 0; /* can try inflateSync */
|
|
break;
|
|
}
|
|
if (r == Z_OK)
|
|
r = f;
|
|
if (r != Z_STREAM_END)
|
|
return r;
|
|
r = f;
|
|
inflate_blocks_reset(z->state->blocks, z, &z->state->sub.check.was);
|
|
if (z->state->nowrap)
|
|
{
|
|
z->state->mode = imDONE;
|
|
break;
|
|
}
|
|
z->state->mode = imCHECK4;
|
|
case imCHECK4:
|
|
iNEEDBYTE
|
|
z->state->sub.check.need = (uLong)iNEXTBYTE << 24;
|
|
z->state->mode = imCHECK3;
|
|
case imCHECK3:
|
|
iNEEDBYTE
|
|
z->state->sub.check.need += (uLong)iNEXTBYTE << 16;
|
|
z->state->mode = imCHECK2;
|
|
case imCHECK2:
|
|
iNEEDBYTE
|
|
z->state->sub.check.need += (uLong)iNEXTBYTE << 8;
|
|
z->state->mode = imCHECK1;
|
|
case imCHECK1:
|
|
iNEEDBYTE
|
|
z->state->sub.check.need += (uLong)iNEXTBYTE;
|
|
|
|
if (z->state->sub.check.was != z->state->sub.check.need)
|
|
{
|
|
z->state->mode = imBAD;
|
|
z->msg = (char*)"incorrect data check";
|
|
z->state->sub.marker = 5; /* can't try inflateSync */
|
|
break;
|
|
}
|
|
Tracev(("inflate: zlib check ok\n"));
|
|
z->state->mode = imDONE;
|
|
case imDONE:
|
|
return Z_STREAM_END;
|
|
case imBAD:
|
|
return Z_DATA_ERROR;
|
|
default:
|
|
return Z_STREAM_ERROR;
|
|
}
|
|
#ifdef NEED_DUMMY_RETURN
|
|
return Z_STREAM_ERROR; /* Some dumb compilers complain without this */
|
|
#endif
|
|
}
|
|
|
|
|
|
int inflateSetDictionary(z_streamp z, const Byte *dictionary, uInt dictLength)
|
|
{
|
|
uInt length = dictLength;
|
|
|
|
if (z == Z_NULL || z->state == Z_NULL || z->state->mode != imDICT0)
|
|
return Z_STREAM_ERROR;
|
|
|
|
if (adler32(1L, dictionary, dictLength) != z->adler) return Z_DATA_ERROR;
|
|
z->adler = 1L;
|
|
|
|
if (length >= ((uInt)1<<z->state->wbits))
|
|
{
|
|
length = (1<<z->state->wbits)-1;
|
|
dictionary += dictLength - length;
|
|
}
|
|
inflate_set_dictionary(z->state->blocks, dictionary, length);
|
|
z->state->mode = imBLOCKS;
|
|
return Z_OK;
|
|
}
|
|
|
|
|
|
int inflateSync(z_streamp z)
|
|
{
|
|
uInt n; /* number of bytes to look at */
|
|
Byte *p; /* pointer to bytes */
|
|
uInt m; /* number of marker bytes found in a row */
|
|
uLong r, w; /* temporaries to save total_in and total_out */
|
|
|
|
/* set up */
|
|
if (z == Z_NULL || z->state == Z_NULL)
|
|
return Z_STREAM_ERROR;
|
|
if (z->state->mode != imBAD)
|
|
{
|
|
z->state->mode = imBAD;
|
|
z->state->sub.marker = 0;
|
|
}
|
|
if ((n = z->avail_in) == 0)
|
|
return Z_BUF_ERROR;
|
|
p = z->next_in;
|
|
m = z->state->sub.marker;
|
|
|
|
/* search */
|
|
while (n && m < 4)
|
|
{
|
|
static const Byte mark[4] = {0, 0, 0xff, 0xff};
|
|
if (*p == mark[m])
|
|
m++;
|
|
else if (*p)
|
|
m = 0;
|
|
else
|
|
m = 4 - m;
|
|
p++, n--;
|
|
}
|
|
|
|
/* restore */
|
|
z->total_in += p - z->next_in;
|
|
z->next_in = p;
|
|
z->avail_in = n;
|
|
z->state->sub.marker = m;
|
|
|
|
/* return no joy or set up to restart on a new block */
|
|
if (m != 4)
|
|
return Z_DATA_ERROR;
|
|
r = z->total_in; w = z->total_out;
|
|
inflateReset(z);
|
|
z->total_in = r; z->total_out = w;
|
|
z->state->mode = imBLOCKS;
|
|
return Z_OK;
|
|
}
|
|
|
|
|
|
/* Returns true if inflate is currently at the end of a block generated
|
|
* by Z_SYNC_FLUSH or Z_FULL_FLUSH. This function is used by one PPP
|
|
* implementation to provide an additional safety check. PPP uses Z_SYNC_FLUSH
|
|
* but removes the length bytes of the resulting empty stored block. When
|
|
* decompressing, PPP checks that at the end of input packet, inflate is
|
|
* waiting for these length bytes.
|
|
*/
|
|
int inflateSyncPoint(z_streamp z)
|
|
{
|
|
if (z == Z_NULL || z->state == Z_NULL || z->state->blocks == Z_NULL)
|
|
return Z_STREAM_ERROR;
|
|
return inflate_blocks_sync_point(z->state->blocks);
|
|
}
|
|
|
|
voidp zcalloc (voidp opaque, unsigned items, unsigned size)
|
|
{
|
|
if (opaque) items += size - size; /* make compiler happy */
|
|
return (voidp)Mem_ClearedAlloc(items*size);
|
|
}
|
|
|
|
void zcfree (voidp opaque, voidp ptr)
|
|
{
|
|
Mem_Free(ptr);
|
|
if (opaque) return; /* make compiler happy */
|
|
}
|