zip 格式文件 压缩 解压缩 源代码 VC6.0 VS2008 测试程序

#include "stdafx.h" #include "unzip.h" // THIS FILE is almost entirely based upon code by Jean-loup Gailly // and Mark Adler. It has been modified by Lucian Wischik. // The modifications were: incorporate the bugfixes of 1.1.4, allow // unzipping to/from handles/pipes/files/memory, encryption, unicode, // a windowsish api, and putting everything into a single .cpp file. // The original code may be found at http://www.gzip.org/zlib/ // The original copyright text follows. // // // // zlib.h -- interface of the 'zlib' general purpose compression library // version 1.1.3, July 9th, 1998 // // Copyright (C) 1995-1998 Jean-loup Gailly and Mark Adler // // This software is provided 'as-is', without any express or implied // warranty. In no event will the authors be held liable for any damages // arising from the use of this software. // // Permission is granted to anyone to use this software for any purpose, // including commercial applications, and to alter it and redistribute it // freely, subject to the following restrictions: // // 1. The origin of this software must not be misrepresented; you must not // claim that you wrote the original software. If you use this software // in a product, an acknowledgment in the product documentation would be // appreciated but is not required. // 2. Altered source versions must be plainly marked as such, and must not be // misrepresented as being the original software. // 3. This notice may not be removed or altered from any source distribution. // // Jean-loup Gailly Mark Adler // jloup@gzip.org madler@alumni.caltech.edu // // // The data format used by the zlib library is described by RFCs (Request for // Comments) 1950 to 1952 in the files ftp://ds.internic.net/rfc/rfc1950.txt // (zlib format), rfc1951.txt (deflate format) and rfc1952.txt (gzip format). // // // The 'zlib' compression library provides in-memory compression and // decompression functions, including integrity checks of the uncompressed // data. This version of the library supports only one compression method // (deflation) but other algorithms will be added later and will have the same // stream interface. // // Compression can be done in a single step if the buffers are large // enough (for example if an input file is mmap'ed), or can be done by // repeated calls of the compression function. In the latter case, the // application must provide more input and/or consume the output // (providing more output space) before each call. // // The library also supports reading and writing files in gzip (.gz) format // with an interface similar to that of stdio. // // The library does not install any signal handler. The decoder checks // the consistency of the compressed data, so the library should never // crash even in case of corrupted input. // // for more info about .ZIP format, see ftp://ftp.cdrom.com/pub/infozip/doc/appnote-970311-iz.zip // PkWare has also a specification at ftp://ftp.pkware.com/probdesc.zip #define ZIP_HANDLE 1 #define ZIP_FILENAME 2 #define ZIP_MEMORY 3 #define zmalloc(len) malloc(len) #define zfree(p) free(p) /* void *zmalloc(unsigned int len) { char *buf = new char[len+32]; for (int i=0; i<16; i++) { buf[i]=i; buf[len+31-i]=i; } *((unsigned int*)buf) = len; char c[1000]; wsprintf(c,"malloc 0x%lx - %lu",buf+16,len); OutputDebugString(c); return buf+16; } void zfree(void *buf) { char c[1000]; wsprintf(c,"free 0x%lx",buf); OutputDebugString(c); char *p = ((char*)buf)-16; unsigned int len = *((unsigned int*)p); bool blown=false; for (int i=0; i<16; i++) { char lo = p[i]; char hi = p[len+31-i]; if (hi!=i || (lo!=i && i>4)) blown=true; } if (blown) { OutputDebugString("BLOWN!!!"); } delete[] p; } */ typedef struct tm_unz_s { unsigned int tm_sec; // seconds after the minute - [0,59] unsigned int tm_min; // minutes after the hour - [0,59] unsigned int tm_hour; // hours since midnight - [0,23] unsigned int tm_mday; // day of the month - [1,31] unsigned int tm_mon; // months since January - [0,11] unsigned int tm_year; // years - [1980..2044] } tm_unz; // unz_global_info structure contain global data about the ZIPfile typedef struct unz_global_info_s { unsigned long number_entry; // total number of entries in the central dir on this disk unsigned long size_comment; // size of the global comment of the zipfile } unz_global_info; // unz_file_info contain information about a file in the zipfile typedef struct unz_file_info_s { unsigned long version; // version made by 2 bytes unsigned long version_needed; // version needed to extract 2 bytes unsigned long flag; // general purpose bit flag 2 bytes unsigned long compression_method; // compression method 2 bytes unsigned long dosDate; // last mod file date in Dos fmt 4 bytes unsigned long crc; // crc-32 4 bytes unsigned long compressed_size; // compressed size 4 bytes unsigned long uncompressed_size; // uncompressed size 4 bytes unsigned long size_filename; // filename length 2 bytes unsigned long size_file_extra; // extra field length 2 bytes unsigned long size_file_comment; // file comment length 2 bytes unsigned long disk_num_start; // disk number start 2 bytes unsigned long internal_fa; // internal file attributes 2 bytes unsigned long external_fa; // external file attributes 4 bytes tm_unz tmu_date; } unz_file_info; #define UNZ_OK (0) #define UNZ_END_OF_LIST_OF_FILE (-100) #define UNZ_ERRNO (Z_ERRNO) #define UNZ_EOF (0) #define UNZ_PARAMERROR (-102) #define UNZ_BADZIPFILE (-103) #define UNZ_INTERNALERROR (-104) #define UNZ_CRCERROR (-105) #define UNZ_PASSWORD (-106) #define ZLIB_VERSION "1.1.3" // Allowed flush values; see deflate() for details #define Z_NO_FLUSH 0 #define Z_SYNC_FLUSH 2 #define Z_FULL_FLUSH 3 #define Z_FINISH 4 // compression levels #define Z_NO_COMPRESSION 0 #define Z_BEST_SPEED 1 #define Z_BEST_COMPRESSION 9 #define Z_DEFAULT_COMPRESSION (-1) // compression strategy; see deflateInit2() for details #define Z_FILTERED 1 #define Z_HUFFMAN_ONLY 2 #define Z_DEFAULT_STRATEGY 0 // Possible values of the data_type field #define Z_BINARY 0 #define Z_ASCII 1 #define Z_UNKNOWN 2 // The deflate compression method (the only one supported in this version) #define Z_DEFLATED 8 // for initializing zalloc, zfree, opaque #define Z_NULL 0 // case sensitivity when searching for filenames #define CASE_SENSITIVE 1 #define CASE_INSENSITIVE 2 // Return codes for the compression/decompression functions. Negative // values are errors, positive values are used for special but normal events. #define Z_OK 0 #define Z_STREAM_END 1 #define Z_NEED_DICT 2 #define Z_ERRNO (-1) #define Z_STREAM_ERROR (-2) #define Z_DATA_ERROR (-3) #define Z_MEM_ERROR (-4) #define Z_BUF_ERROR (-5) #define Z_VERSION_ERROR (-6) // Basic data types typedef unsigned char Byte; // 8 bits typedef unsigned int uInt; // 16 bits or more typedef unsigned long uLong; // 32 bits or more typedef void *voidpf; typedef void *voidp; typedef long z_off_t; typedef voidpf (*alloc_func) (voidpf opaque, uInt items, uInt size); typedef vo