bzlib_stdio.h (4971B)
1 /* 2 * THIS FILE IS NOT IDENTICAL TO THE ORIGINAL 3 * FROM THE BZIP2 DISTRIBUTION. 4 * 5 * It has been modified, mainly to break the library 6 * into smaller pieces. 7 * 8 * Russ Cox 9 * rsc@plan9.bell-labs.com 10 * July 2000 11 */ 12 13 /*-------------------------------------------------------------*/ 14 /*--- Library top-level functions. ---*/ 15 /*--- bzlib.c ---*/ 16 /*-------------------------------------------------------------*/ 17 18 /*-- 19 This file is a part of bzip2 and/or libbzip2, a program and 20 library for lossless, block-sorting data compression. 21 22 Copyright (C) 1996-2000 Julian R Seward. All rights reserved. 23 24 Redistribution and use in source and binary forms, with or without 25 modification, are permitted provided that the following conditions 26 are met: 27 28 1. Redistributions of source code must retain the above copyright 29 notice, this list of conditions and the following disclaimer. 30 31 2. The origin of this software must not be misrepresented; you must 32 not claim that you wrote the original software. If you use this 33 software in a product, an acknowledgment in the product 34 documentation would be appreciated but is not required. 35 36 3. Altered source versions must be plainly marked as such, and must 37 not be misrepresented as being the original software. 38 39 4. The name of the author may not be used to endorse or promote 40 products derived from this software without specific prior written 41 permission. 42 43 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 44 OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 45 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 46 ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 47 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 48 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE 49 GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 50 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 51 WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 52 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 53 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 54 55 Julian Seward, Cambridge, UK. 56 jseward@acm.org 57 bzip2/libbzip2 version 1.0 of 21 March 2000 58 59 This program is based on (at least) the work of: 60 Mike Burrows 61 David Wheeler 62 Peter Fenwick 63 Alistair Moffat 64 Radford Neal 65 Ian H. Witten 66 Robert Sedgewick 67 Jon L. Bentley 68 69 For more information on these sources, see the manual. 70 --*/ 71 72 /*-- 73 CHANGES 74 ~~~~~~~ 75 0.9.0 -- original version. 76 77 0.9.0a/b -- no changes in this file. 78 79 0.9.0c 80 * made zero-length BZ_FLUSH work correctly in bzCompress(). 81 * fixed bzWrite/bzRead to ignore zero-length requests. 82 * fixed bzread to correctly handle read requests after EOF. 83 * wrong parameter order in call to bzDecompressInit in 84 bzBuffToBuffDecompress. Fixed. 85 --*/ 86 87 #include <stdio.h> 88 89 #define BZ_MAX_UNUSED 5000 90 91 typedef void BZFILE; 92 93 BZ_EXTERN BZFILE * BZ_API(BZ2_bzopen) ( 94 const char *path, 95 const char *mode 96 ); 97 98 BZ_EXTERN BZFILE * BZ_API(BZ2_bzdopen) ( 99 int fd, 100 const char *mode 101 ); 102 103 BZ_EXTERN int BZ_API(BZ2_bzread) ( 104 BZFILE* b, 105 void* buf, 106 int len 107 ); 108 109 BZ_EXTERN int BZ_API(BZ2_bzwrite) ( 110 BZFILE* b, 111 void* buf, 112 int len 113 ); 114 115 BZ_EXTERN int BZ_API(BZ2_bzflush) ( 116 BZFILE* b 117 ); 118 119 BZ_EXTERN void BZ_API(BZ2_bzclose) ( 120 BZFILE* b 121 ); 122 123 BZ_EXTERN const char * BZ_API(BZ2_bzerror) ( 124 BZFILE *b, 125 int *errnum 126 ); 127 128 129 /*-- High(er) level library functions --*/ 130 BZ_EXTERN BZFILE* BZ_API(BZ2_bzReadOpen) ( 131 int* bzerror, 132 FILE* f, 133 int verbosity, 134 int small, 135 void* unused, 136 int nUnused 137 ); 138 139 BZ_EXTERN void BZ_API(BZ2_bzReadClose) ( 140 int* bzerror, 141 BZFILE* b 142 ); 143 144 BZ_EXTERN void BZ_API(BZ2_bzReadGetUnused) ( 145 int* bzerror, 146 BZFILE* b, 147 void** unused, 148 int* nUnused 149 ); 150 151 BZ_EXTERN int BZ_API(BZ2_bzRead) ( 152 int* bzerror, 153 BZFILE* b, 154 void* buf, 155 int len 156 ); 157 158 BZ_EXTERN BZFILE* BZ_API(BZ2_bzWriteOpen) ( 159 int* bzerror, 160 FILE* f, 161 int blockSize100k, 162 int verbosity, 163 int workFactor 164 ); 165 166 BZ_EXTERN void BZ_API(BZ2_bzWrite) ( 167 int* bzerror, 168 BZFILE* b, 169 void* buf, 170 int len 171 ); 172 173 BZ_EXTERN void BZ_API(BZ2_bzWriteClose) ( 174 int* bzerror, 175 BZFILE* b, 176 int abandon, 177 unsigned int* nbytes_in, 178 unsigned int* nbytes_out 179 ); 180 181 BZ_EXTERN void BZ_API(BZ2_bzWriteClose64) ( 182 int* bzerror, 183 BZFILE* b, 184 int abandon, 185 unsigned int* nbytes_in_lo32, 186 unsigned int* nbytes_in_hi32, 187 unsigned int* nbytes_out_lo32, 188 unsigned int* nbytes_out_hi32 189 );