| 1 |
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| 2 | /*-------------------------------------------------------------*/
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| 3 | /*--- Private header file for the library. ---*/
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| 4 | /*--- bzlib_private.h ---*/
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| 5 | /*-------------------------------------------------------------*/
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| 6 |
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| 7 | /*--
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| 8 | This file is a part of bzip2 and/or libbzip2, a program and
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| 9 | library for lossless, block-sorting data compression.
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| 10 |
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| 11 | Copyright (C) 1996-2000 Julian R Seward. All rights reserved.
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| 12 |
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| 13 | Redistribution and use in source and binary forms, with or without
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| 14 | modification, are permitted provided that the following conditions
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| 15 | are met:
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| 16 |
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| 17 | 1. Redistributions of source code must retain the above copyright
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| 18 | notice, this list of conditions and the following disclaimer.
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| 19 |
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| 20 | 2. The origin of this software must not be misrepresented; you must
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| 21 | not claim that you wrote the original software. If you use this
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| 22 | software in a product, an acknowledgment in the product
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| 23 | documentation would be appreciated but is not required.
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| 24 |
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| 25 | 3. Altered source versions must be plainly marked as such, and must
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| 26 | not be misrepresented as being the original software.
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| 27 |
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| 28 | 4. The name of the author may not be used to endorse or promote
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| 29 | products derived from this software without specific prior written
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| 30 | permission.
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| 31 |
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| 32 | THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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| 33 | OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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| 34 | WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 35 | ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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| 36 | DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 37 | DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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| 38 | GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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| 39 | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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| 40 | WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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| 41 | NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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| 42 | SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 43 |
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| 44 | Julian Seward, Cambridge, UK.
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| 45 | jseward@acm.org
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| 46 | bzip2/libbzip2 version 1.0 of 21 March 2000
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| 47 |
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| 48 | This program is based on (at least) the work of:
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| 49 | Mike Burrows
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| 50 | David Wheeler
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| 51 | Peter Fenwick
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| 52 | Alistair Moffat
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| 53 | Radford Neal
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| 54 | Ian H. Witten
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| 55 | Robert Sedgewick
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| 56 | Jon L. Bentley
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| 57 |
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| 58 | For more information on these sources, see the manual.
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| 59 | --*/
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| 60 |
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| 61 |
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| 62 | #ifndef _BZLIB_PRIVATE_H
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| 63 | #define _BZLIB_PRIVATE_H
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| 64 |
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| 65 | #include <stdlib.h>
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| 66 |
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| 67 | #ifndef BZ_NO_STDIO
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| 68 | #include <stdio.h>
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| 69 | #include <ctype.h>
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| 70 | #include <string.h>
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| 71 | #endif
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| 72 |
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| 73 | #include "libbz2\bzlib.h"
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| 74 |
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| 75 |
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| 76 |
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| 77 | /*-- General stuff. --*/
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| 78 |
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| 79 | #define BZ_VERSION "1.0.0, 16-May-2000"
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| 80 |
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| 81 | typedef char Char;
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| 82 | typedef unsigned char Bool;
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| 83 | typedef unsigned char UChar;
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| 84 | typedef int Int32;
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| 85 | typedef unsigned int UInt32;
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| 86 | typedef short Int16;
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| 87 | typedef unsigned short UInt16;
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| 88 |
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| 89 | #define True ((Bool)1)
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| 90 | #define False ((Bool)0)
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| 91 |
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| 92 | #ifndef __GNUC__
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| 93 | #define __inline__ /* */
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| 94 | #endif
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| 95 |
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| 96 | #ifndef BZ_NO_STDIO
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| 97 | extern void BZ2_bz__AssertH__fail ( int errcode );
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| 98 | #define AssertH(cond,errcode) \
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| 99 | { if (!(cond)) BZ2_bz__AssertH__fail ( errcode ); }
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| 100 | #if BZ_DEBUG
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| 101 | #define AssertD(cond,msg) \
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| 102 | { if (!(cond)) { \
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| 103 | fprintf ( stderr, \
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| 104 | "\n\nlibbzip2(debug build): internal error\n\t%s\n", msg );\
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| 105 | exit(1); \
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| 106 | }}
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| 107 | #else
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| 108 | #define AssertD(cond,msg) /* */
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| 109 | #endif
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| 110 | #define VPrintf0(zf) \
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| 111 | fprintf(stderr,zf)
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| 112 | #define VPrintf1(zf,za1) \
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| 113 | fprintf(stderr,zf,za1)
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| 114 | #define VPrintf2(zf,za1,za2) \
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| 115 | fprintf(stderr,zf,za1,za2)
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| 116 | #define VPrintf3(zf,za1,za2,za3) \
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| 117 | fprintf(stderr,zf,za1,za2,za3)
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| 118 | #define VPrintf4(zf,za1,za2,za3,za4) \
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| 119 | fprintf(stderr,zf,za1,za2,za3,za4)
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| 120 | #define VPrintf5(zf,za1,za2,za3,za4,za5) \
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| 121 | fprintf(stderr,zf,za1,za2,za3,za4,za5)
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| 122 | #else
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| 123 | extern void bz_internal_error ( int errcode );
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| 124 | #define AssertH(cond,errcode) \
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| 125 | { if (!(cond)) bz_internal_error ( errcode ); }
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| 126 | #define AssertD(cond,msg) /* */
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| 127 | #define VPrintf0(zf) /* */
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| 128 | #define VPrintf1(zf,za1) /* */
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| 129 | #define VPrintf2(zf,za1,za2) /* */
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| 130 | #define VPrintf3(zf,za1,za2,za3) /* */
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| 131 | #define VPrintf4(zf,za1,za2,za3,za4) /* */
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| 132 | #define VPrintf5(zf,za1,za2,za3,za4,za5) /* */
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| 133 | #endif
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| 134 |
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| 135 |
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| 136 | #define BZALLOC(nnn) (strm->bzalloc)(strm->opaque,(nnn),1)
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| 137 | #define BZFREE(ppp) (strm->bzfree)(strm->opaque,(ppp))
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| 138 |
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| 139 |
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| 140 | /*-- Constants for the back end. --*/
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| 141 |
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| 142 | #define BZ_MAX_ALPHA_SIZE 258
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| 143 | #define BZ_MAX_CODE_LEN 23
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| 144 |
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| 145 | #define BZ_RUNA 0
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| 146 | #define BZ_RUNB 1
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| 147 |
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| 148 | #define BZ_N_GROUPS 6
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| 149 | #define BZ_G_SIZE 50
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| 150 | #define BZ_N_ITERS 4
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| 151 |
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| 152 | #define BZ_MAX_SELECTORS (2 + (900000 / BZ_G_SIZE))
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| 153 |
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| 154 |
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| 155 |
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| 156 | /*-- Stuff for randomising repetitive blocks. --*/
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| 157 |
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| 158 | extern Int32 BZ2_rNums[512];
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| 159 |
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| 160 | #define BZ_RAND_DECLS \
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| 161 | Int32 rNToGo; \
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| 162 | Int32 rTPos \
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| 163 |
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| 164 | #define BZ_RAND_INIT_MASK \
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| 165 | s->rNToGo = 0; \
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| 166 | s->rTPos = 0 \
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| 167 |
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| 168 | #define BZ_RAND_MASK ((s->rNToGo == 1) ? 1 : 0)
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| 169 |
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| 170 | #define BZ_RAND_UPD_MASK \
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| 171 | if (s->rNToGo == 0) { \
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| 172 | s->rNToGo = BZ2_rNums[s->rTPos]; \
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| 173 | s->rTPos++; \
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| 174 | if (s->rTPos == 512) s->rTPos = 0; \
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| 175 | } \
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| 176 | s->rNToGo--;
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| 177 |
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| 178 |
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| 179 |
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| 180 | /*-- Stuff for doing CRCs. --*/
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| 181 |
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| 182 | extern UInt32 BZ2_crc32Table[256];
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| 183 |
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| 184 | #define BZ_INITIALISE_CRC(crcVar) \
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| 185 | { \
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| 186 | crcVar = 0xffffffffL; \
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| 187 | }
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| 188 |
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| 189 | #define BZ_FINALISE_CRC(crcVar) \
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| 190 | { \
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| 191 | crcVar = ~(crcVar); \
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| 192 | }
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| 193 |
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| 194 | #define BZ_UPDATE_CRC(crcVar,cha) \
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| 195 | { \
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| 196 | crcVar = (crcVar << 8) ^ \
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| 197 | BZ2_crc32Table[(crcVar >> 24) ^ \
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| 198 | ((UChar)cha)]; \
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| 199 | }
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| 200 |
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| 201 |
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| 202 |
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| 203 | /*-- States and modes for compression. --*/
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| 204 |
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| 205 | #define BZ_M_IDLE 1
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| 206 | #define BZ_M_RUNNING 2
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| 207 | #define BZ_M_FLUSHING 3
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| 208 | #define BZ_M_FINISHING 4
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| 209 |
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| 210 | #define BZ_S_OUTPUT 1
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| 211 | #define BZ_S_INPUT 2
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| 212 |
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| 213 | #define BZ_N_RADIX 2
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| 214 | #define BZ_N_QSORT 12
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| 215 | #define BZ_N_SHELL 18
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| 216 | #define BZ_N_OVERSHOOT (BZ_N_RADIX + BZ_N_QSORT + BZ_N_SHELL + 2)
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| 217 |
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| 218 |
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| 219 |
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| 220 |
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| 221 | /*-- Structure holding all the compression-side stuff. --*/
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| 222 |
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| 223 | typedef
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| 224 | struct {
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| 225 | /* pointer back to the struct bz_stream */
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| 226 | bz_stream* strm;
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| 227 |
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| 228 | /* mode this stream is in, and whether inputting */
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| 229 | /* or outputting data */
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| 230 | Int32 mode;
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| 231 | Int32 state;
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| 232 |
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| 233 | /* remembers avail_in when flush/finish requested */
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| 234 | UInt32 avail_in_expect;
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| 235 |
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| 236 | /* for doing the block sorting */
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| 237 | UInt32* arr1;
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| 238 | UInt32* arr2;
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| 239 | UInt32* ftab;
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| 240 | Int32 origPtr;
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| 241 |
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| 242 | /* aliases for arr1 and arr2 */
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| 243 | UInt32* ptr;
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| 244 | UChar* block;
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| 245 | UInt16* mtfv;
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| 246 | UChar* zbits;
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| 247 |
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| 248 | /* for deciding when to use the fallback sorting algorithm */
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| 249 | Int32 workFactor;
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| 250 |
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| 251 | /* run-length-encoding of the input */
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| 252 | UInt32 state_in_ch;
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| 253 | Int32 state_in_len;
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| 254 | BZ_RAND_DECLS;
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| 255 |
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| 256 | /* input and output limits and current posns */
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| 257 | Int32 nblock;
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| 258 | Int32 nblockMAX;
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| 259 | Int32 numZ;
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| 260 | Int32 state_out_pos;
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| 261 |
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| 262 | /* map of bytes used in block */
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| 263 | Int32 nInUse;
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| 264 | Bool inUse[256];
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| 265 | UChar unseqToSeq[256];
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| 266 |
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| 267 | /* the buffer for bit stream creation */
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| 268 | UInt32 bsBuff;
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| 269 | Int32 bsLive;
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| 270 |
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| 271 | /* block and combined CRCs */
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| 272 | UInt32 blockCRC;
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| 273 | UInt32 combinedCRC;
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| 274 |
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| 275 | /* misc administratium */
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| 276 | Int32 verbosity;
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| 277 | Int32 blockNo;
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| 278 | Int32 blockSize100k;
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| 279 |
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| 280 | /* stuff for coding the MTF values */
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| 281 | Int32 nMTF;
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| 282 | Int32 mtfFreq [BZ_MAX_ALPHA_SIZE];
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| 283 | UChar selector [BZ_MAX_SELECTORS];
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| 284 | UChar selectorMtf[BZ_MAX_SELECTORS];
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| 285 |
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| 286 | UChar len [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
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| 287 | Int32 code [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
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| 288 | Int32 rfreq [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
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| 289 | /* second dimension: only 3 needed; 4 makes index calculations faster */
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| 290 | UInt32 len_pack[BZ_MAX_ALPHA_SIZE][4];
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| 291 |
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| 292 | }
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| 293 | EState;
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| 294 |
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| 295 |
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| 296 |
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| 297 | /*-- externs for compression. --*/
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| 298 |
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| 299 | extern void
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| 300 | BZ2_blockSort ( EState* );
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| 301 |
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| 302 | extern void
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| 303 | BZ2_compressBlock ( EState*, Bool );
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| 304 |
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| 305 | extern void
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| 306 | BZ2_bsInitWrite ( EState* );
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| 307 |
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| 308 | extern void
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| 309 | BZ2_hbAssignCodes ( Int32*, UChar*, Int32, Int32, Int32 );
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| 310 |
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| 311 | extern void
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| 312 | BZ2_hbMakeCodeLengths ( UChar*, Int32*, Int32, Int32 );
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| 313 |
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| 314 |
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| 315 |
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| 316 | /*-- states for decompression. --*/
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| 317 |
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| 318 | #define BZ_X_IDLE 1
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| 319 | #define BZ_X_OUTPUT 2
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| 320 |
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| 321 | #define BZ_X_MAGIC_1 10
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| 322 | #define BZ_X_MAGIC_2 11
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| 323 | #define BZ_X_MAGIC_3 12
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| 324 | #define BZ_X_MAGIC_4 13
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| 325 | #define BZ_X_BLKHDR_1 14
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| 326 | #define BZ_X_BLKHDR_2 15
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| 327 | #define BZ_X_BLKHDR_3 16
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| 328 | #define BZ_X_BLKHDR_4 17
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| 329 | #define BZ_X_BLKHDR_5 18
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| 330 | #define BZ_X_BLKHDR_6 19
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| 331 | #define BZ_X_BCRC_1 20
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| 332 | #define BZ_X_BCRC_2 21
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| 333 | #define BZ_X_BCRC_3 22
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| 334 | #define BZ_X_BCRC_4 23
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| 335 | #define BZ_X_RANDBIT 24
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| 336 | #define BZ_X_ORIGPTR_1 25
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| 337 | #define BZ_X_ORIGPTR_2 26
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| 338 | #define BZ_X_ORIGPTR_3 27
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| 339 | #define BZ_X_MAPPING_1 28
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| 340 | #define BZ_X_MAPPING_2 29
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| 341 | #define BZ_X_SELECTOR_1 30
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| 342 | #define BZ_X_SELECTOR_2 31
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| 343 | #define BZ_X_SELECTOR_3 32
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| 344 | #define BZ_X_CODING_1 33
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| 345 | #define BZ_X_CODING_2 34
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| 346 | #define BZ_X_CODING_3 35
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| 347 | #define BZ_X_MTF_1 36
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| 348 | #define BZ_X_MTF_2 37
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| 349 | #define BZ_X_MTF_3 38
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| 350 | #define BZ_X_MTF_4 39
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| 351 | #define BZ_X_MTF_5 40
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| 352 | #define BZ_X_MTF_6 41
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| 353 | #define BZ_X_ENDHDR_2 42
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| 354 | #define BZ_X_ENDHDR_3 43
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| 355 | #define BZ_X_ENDHDR_4 44
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| 356 | #define BZ_X_ENDHDR_5 45
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| 357 | #define BZ_X_ENDHDR_6 46
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| 358 | #define BZ_X_CCRC_1 47
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| 359 | #define BZ_X_CCRC_2 48
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| 360 | #define BZ_X_CCRC_3 49
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| 361 | #define BZ_X_CCRC_4 50
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| 362 |
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| 363 |
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| 364 |
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| 365 | /*-- Constants for the fast MTF decoder. --*/
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| 366 |
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| 367 | #define MTFA_SIZE 4096
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| 368 | #define MTFL_SIZE 16
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| 369 |
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| 370 |
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| 371 |
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| 372 | /*-- Structure holding all the decompression-side stuff. --*/
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| 373 |
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| 374 | typedef
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| 375 | struct {
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| 376 | /* pointer back to the struct bz_stream */
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| 377 | bz_stream* strm;
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| 378 |
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| 379 | /* state indicator for this stream */
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| 380 | Int32 state;
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| 381 |
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| 382 | /* for doing the final run-length decoding */
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| 383 | UChar state_out_ch;
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| 384 | Int32 state_out_len;
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| 385 | Bool blockRandomised;
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| 386 | BZ_RAND_DECLS;
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| 387 |
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| 388 | /* the buffer for bit stream reading */
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| 389 | UInt32 bsBuff;
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| 390 | Int32 bsLive;
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| 391 |
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| 392 | /* misc administratium */
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| 393 | Int32 blockSize100k;
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| 394 | Bool smallDecompress;
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| 395 | Int32 currBlockNo;
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| 396 | Int32 verbosity;
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| 397 |
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| 398 | /* for undoing the Burrows-Wheeler transform */
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| 399 | Int32 origPtr;
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| 400 | UInt32 tPos;
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| 401 | Int32 k0;
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| 402 | Int32 unzftab[256];
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| 403 | Int32 nblock_used;
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| 404 | Int32 cftab[257];
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| 405 | Int32 cftabCopy[257];
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| 406 |
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| 407 | /* for undoing the Burrows-Wheeler transform (FAST) */
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| 408 | UInt32 *tt;
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| 409 |
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| 410 | /* for undoing the Burrows-Wheeler transform (SMALL) */
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| 411 | UInt16 *ll16;
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| 412 | UChar *ll4;
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| 413 |
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| 414 | /* stored and calculated CRCs */
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|---|
| 415 | UInt32 storedBlockCRC;
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|---|
| 416 | UInt32 storedCombinedCRC;
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| 417 | UInt32 calculatedBlockCRC;
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| 418 | UInt32 calculatedCombinedCRC;
|
|---|
| 419 |
|
|---|
| 420 | /* map of bytes used in block */
|
|---|
| 421 | Int32 nInUse;
|
|---|
| 422 | Bool inUse[256];
|
|---|
| 423 | Bool inUse16[16];
|
|---|
| 424 | UChar seqToUnseq[256];
|
|---|
| 425 |
|
|---|
| 426 | /* for decoding the MTF values */
|
|---|
| 427 | UChar mtfa [MTFA_SIZE];
|
|---|
| 428 | Int32 mtfbase[256 / MTFL_SIZE];
|
|---|
| 429 | UChar selector [BZ_MAX_SELECTORS];
|
|---|
| 430 | UChar selectorMtf[BZ_MAX_SELECTORS];
|
|---|
| 431 | UChar len [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
|
|---|
| 432 |
|
|---|
| 433 | Int32 limit [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
|
|---|
| 434 | Int32 base [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
|
|---|
| 435 | Int32 perm [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
|
|---|
| 436 | Int32 minLens[BZ_N_GROUPS];
|
|---|
| 437 |
|
|---|
| 438 | /* save area for scalars in the main decompress code */
|
|---|
| 439 | Int32 save_i;
|
|---|
| 440 | Int32 save_j;
|
|---|
| 441 | Int32 save_t;
|
|---|
| 442 | Int32 save_alphaSize;
|
|---|
| 443 | Int32 save_nGroups;
|
|---|
| 444 | Int32 save_nSelectors;
|
|---|
| 445 | Int32 save_EOB;
|
|---|
| 446 | Int32 save_groupNo;
|
|---|
| 447 | Int32 save_groupPos;
|
|---|
| 448 | Int32 save_nextSym;
|
|---|
| 449 | Int32 save_nblockMAX;
|
|---|
| 450 | Int32 save_nblock;
|
|---|
| 451 | Int32 save_es;
|
|---|
| 452 | Int32 save_N;
|
|---|
| 453 | Int32 save_curr;
|
|---|
| 454 | Int32 save_zt;
|
|---|
| 455 | Int32 save_zn;
|
|---|
| 456 | Int32 save_zvec;
|
|---|
| 457 | Int32 save_zj;
|
|---|
| 458 | Int32 save_gSel;
|
|---|
| 459 | Int32 save_gMinlen;
|
|---|
| 460 | Int32* save_gLimit;
|
|---|
| 461 | Int32* save_gBase;
|
|---|
| 462 | Int32* save_gPerm;
|
|---|
| 463 |
|
|---|
| 464 | }
|
|---|
| 465 | DState;
|
|---|
| 466 |
|
|---|
| 467 |
|
|---|
| 468 |
|
|---|
| 469 | /*-- Macros for decompression. --*/
|
|---|
| 470 |
|
|---|
| 471 | #define BZ_GET_FAST(cccc) \
|
|---|
| 472 | s->tPos = s->tt[s->tPos]; \
|
|---|
| 473 | cccc = (UChar)(s->tPos & 0xff); \
|
|---|
| 474 | s->tPos >>= 8;
|
|---|
| 475 |
|
|---|
| 476 | #define BZ_GET_FAST_C(cccc) \
|
|---|
| 477 | c_tPos = c_tt[c_tPos]; \
|
|---|
| 478 | cccc = (UChar)(c_tPos & 0xff); \
|
|---|
| 479 | c_tPos >>= 8;
|
|---|
| 480 |
|
|---|
| 481 | #define SET_LL4(i,n) \
|
|---|
| 482 | { if (((i) & 0x1) == 0) \
|
|---|
| 483 | s->ll4[(i) >> 1] = (s->ll4[(i) >> 1] & 0xf0) | (n); else \
|
|---|
| 484 | s->ll4[(i) >> 1] = (s->ll4[(i) >> 1] & 0x0f) | ((n) << 4); \
|
|---|
| 485 | }
|
|---|
| 486 |
|
|---|
| 487 | #define GET_LL4(i) \
|
|---|
| 488 | ((((UInt32)(s->ll4[(i) >> 1])) >> (((i) << 2) & 0x4)) & 0xF)
|
|---|
| 489 |
|
|---|
| 490 | #define SET_LL(i,n) \
|
|---|
| 491 | { s->ll16[i] = (UInt16)(n & 0x0000ffff); \
|
|---|
| 492 | SET_LL4(i, n >> 16); \
|
|---|
| 493 | }
|
|---|
| 494 |
|
|---|
| 495 | #define GET_LL(i) \
|
|---|
| 496 | (((UInt32)s->ll16[i]) | (GET_LL4(i) << 16))
|
|---|
| 497 |
|
|---|
| 498 | #define BZ_GET_SMALL(cccc) \
|
|---|
| 499 | cccc = BZ2_indexIntoF ( s->tPos, s->cftab ); \
|
|---|
| 500 | s->tPos = GET_LL(s->tPos);
|
|---|
| 501 |
|
|---|
| 502 |
|
|---|
| 503 | /*-- externs for decompression. --*/
|
|---|
| 504 |
|
|---|
| 505 | extern Int32
|
|---|
| 506 | BZ2_indexIntoF ( Int32, Int32* );
|
|---|
| 507 |
|
|---|
| 508 | extern Int32
|
|---|
| 509 | BZ2_decompress ( DState* );
|
|---|
| 510 |
|
|---|
| 511 | extern void
|
|---|
| 512 | BZ2_hbCreateDecodeTables ( Int32*, Int32*, Int32*, UChar*,
|
|---|
| 513 | Int32, Int32, Int32 );
|
|---|
| 514 |
|
|---|
| 515 |
|
|---|
| 516 | #endif
|
|---|
| 517 |
|
|---|
| 518 |
|
|---|
| 519 | /*-- BZ_NO_STDIO seems to make NULL disappear on some platforms. --*/
|
|---|
| 520 |
|
|---|
| 521 | #ifdef BZ_NO_STDIO
|
|---|
| 522 | #ifndef NULL
|
|---|
| 523 | #define NULL 0
|
|---|
| 524 | #endif
|
|---|
| 525 | #endif
|
|---|
| 526 |
|
|---|
| 527 |
|
|---|
| 528 | /*-------------------------------------------------------------*/
|
|---|
| 529 | /*--- end bzlib_private.h ---*/
|
|---|
| 530 | /*-------------------------------------------------------------*/
|
|---|
