513 lines
13 KiB
C
513 lines
13 KiB
C
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/*-------------------------------------------------------------*/
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/*--- Private header file for the library. ---*/
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/*--- bzlib_private.h ---*/
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/*-------------------------------------------------------------*/
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/* ------------------------------------------------------------------
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This file is part of bzip2/libbzip2, a program and library for
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lossless, block-sorting data compression.
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bzip2/libbzip2 version 1.0.6 of 6 September 2010
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Copyright (C) 1996-2010 Julian Seward <jseward@bzip.org>
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Please read the WARNING, DISCLAIMER and PATENTS sections in the
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README file.
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This program is released under the terms of the license contained
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in the file LICENSE.
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------------------------------------------------------------------ */
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#ifndef _BZLIB_PRIVATE_H
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#define _BZLIB_PRIVATE_H
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#include <stdlib.h>
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#ifndef BZ_NO_STDIO
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#include <stdio.h>
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#include <ctype.h>
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#include <string.h>
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#endif
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#include "bzlib.h"
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/*-- General stuff. --*/
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#define BZ_VERSION "1.0.6, 6-Sept-2010"
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typedef char Char;
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typedef unsigned char Bool;
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typedef unsigned char UChar;
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typedef int Int32;
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typedef unsigned int UInt32;
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typedef short Int16;
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typedef unsigned short UInt16;
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#define True ((Bool)1)
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#define False ((Bool)0)
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#ifndef __GNUC__
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#define __inline__ /* */
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#endif
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#ifndef BZ_NO_STDIO
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extern void BZ2_bz__AssertH__fail ( int errcode );
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#define AssertH(cond,errcode) \
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{ if (!(cond)) BZ2_bz__AssertH__fail ( errcode ); }
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#if BZ_DEBUG
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#define AssertD(cond,msg) \
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{ if (!(cond)) { \
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fprintf ( stderr, \
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"\n\nlibbzip2(debug build): internal error\n\t%s\n", msg );\
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exit(1); \
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}}
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#else
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#define AssertD(cond,msg) /* */
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#endif
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#define VPrintf0(zf) \
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fprintf(stderr,zf)
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#define VPrintf1(zf,za1) \
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fprintf(stderr,zf,za1)
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#define VPrintf2(zf,za1,za2) \
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fprintf(stderr,zf,za1,za2)
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#define VPrintf3(zf,za1,za2,za3) \
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fprintf(stderr,zf,za1,za2,za3)
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#define VPrintf4(zf,za1,za2,za3,za4) \
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fprintf(stderr,zf,za1,za2,za3,za4)
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#define VPrintf5(zf,za1,za2,za3,za4,za5) \
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fprintf(stderr,zf,za1,za2,za3,za4,za5)
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#else
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extern void bz_internal_error ( int errcode );
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#define AssertH(cond,errcode) \
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{ if (!(cond)) bz_internal_error ( errcode ); }
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#define AssertD(cond,msg) do { } while (0)
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#define VPrintf0(zf) do { } while (0)
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#define VPrintf1(zf,za1) do { } while (0)
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#define VPrintf2(zf,za1,za2) do { } while (0)
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#define VPrintf3(zf,za1,za2,za3) do { } while (0)
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#define VPrintf4(zf,za1,za2,za3,za4) do { } while (0)
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#define VPrintf5(zf,za1,za2,za3,za4,za5) do { } while (0)
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#endif
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#define BZALLOC(nnn) (strm->bzalloc)(strm->opaque,(nnn),1)
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#define BZFREE(ppp) (strm->bzfree)(strm->opaque,(ppp))
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/*-- Header bytes. --*/
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#define BZ_HDR_B 0x42 /* 'B' */
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#define BZ_HDR_Z 0x5a /* 'Z' */
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#define BZ_HDR_h 0x68 /* 'h' */
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#define BZ_HDR_0 0x30 /* '0' */
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/*-- Constants for the back end. --*/
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#define BZ_MAX_ALPHA_SIZE 258
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#define BZ_MAX_CODE_LEN 23
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#define BZ_RUNA 0
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#define BZ_RUNB 1
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#define BZ_N_GROUPS 6
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#define BZ_G_SIZE 50
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#define BZ_N_ITERS 4
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#define BZ_MAX_SELECTORS (2 + (900000 / BZ_G_SIZE))
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/*-- Stuff for randomising repetitive blocks. --*/
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extern Int32 BZ2_rNums[512];
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#define BZ_RAND_DECLS \
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Int32 rNToGo; \
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Int32 rTPos \
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#define BZ_RAND_INIT_MASK \
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s->rNToGo = 0; \
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s->rTPos = 0 \
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#define BZ_RAND_MASK ((s->rNToGo == 1) ? 1 : 0)
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#define BZ_RAND_UPD_MASK \
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if (s->rNToGo == 0) { \
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s->rNToGo = BZ2_rNums[s->rTPos]; \
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s->rTPos++; \
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if (s->rTPos == 512) s->rTPos = 0; \
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} \
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s->rNToGo--;
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/*-- Stuff for doing CRCs. --*/
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extern UInt32 BZ2_crc32Table[256];
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#define BZ_INITIALISE_CRC(crcVar) \
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{ \
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crcVar = 0xffffffffL; \
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}
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#define BZ_FINALISE_CRC(crcVar) \
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{ \
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crcVar = ~(crcVar); \
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}
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#define BZ_UPDATE_CRC(crcVar,cha) \
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{ \
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crcVar = (crcVar << 8) ^ \
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BZ2_crc32Table[(crcVar >> 24) ^ \
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((UChar)cha)]; \
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}
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/*-- States and modes for compression. --*/
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#define BZ_M_IDLE 1
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#define BZ_M_RUNNING 2
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#define BZ_M_FLUSHING 3
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#define BZ_M_FINISHING 4
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#define BZ_S_OUTPUT 1
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#define BZ_S_INPUT 2
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#define BZ_N_RADIX 2
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#define BZ_N_QSORT 12
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#define BZ_N_SHELL 18
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#define BZ_N_OVERSHOOT (BZ_N_RADIX + BZ_N_QSORT + BZ_N_SHELL + 2)
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/*-- Structure holding all the compression-side stuff. --*/
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typedef
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struct {
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/* pointer back to the struct bz_stream */
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bz_stream* strm;
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/* mode this stream is in, and whether inputting */
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/* or outputting data */
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Int32 mode;
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Int32 state;
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/* remembers avail_in when flush/finish requested */
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UInt32 avail_in_expect;
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/* for doing the block sorting */
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UInt32* arr1;
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UInt32* arr2;
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UInt32* ftab;
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Int32 origPtr;
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/* aliases for arr1 and arr2 */
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UInt32* ptr;
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UChar* block;
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UInt16* mtfv;
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UChar* zbits;
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/* for deciding when to use the fallback sorting algorithm */
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Int32 workFactor;
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/* run-length-encoding of the input */
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UInt32 state_in_ch;
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Int32 state_in_len;
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BZ_RAND_DECLS;
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/* input and output limits and current posns */
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Int32 nblock;
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Int32 nblockMAX;
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Int32 numZ;
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Int32 state_out_pos;
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/* map of bytes used in block */
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Int32 nInUse;
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Bool inUse[256];
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UChar unseqToSeq[256];
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/* the buffer for bit stream creation */
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UInt32 bsBuff;
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Int32 bsLive;
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/* block and combined CRCs */
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UInt32 blockCRC;
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UInt32 combinedCRC;
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/* misc administratium */
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Int32 verbosity;
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Int32 blockNo;
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Int32 blockSize100k;
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/* stuff for coding the MTF values */
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Int32 nMTF;
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Int32 mtfFreq [BZ_MAX_ALPHA_SIZE];
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UChar selector [BZ_MAX_SELECTORS];
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UChar selectorMtf[BZ_MAX_SELECTORS];
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UChar len [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
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Int32 code [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
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Int32 rfreq [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
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/* second dimension: only 3 needed; 4 makes index calculations faster */
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UInt32 len_pack[BZ_MAX_ALPHA_SIZE][4];
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}
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EState;
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/*-- externs for compression. --*/
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extern void
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BZ2_blockSort ( EState* );
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extern void
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BZ2_compressBlock ( EState*, Bool );
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extern void
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BZ2_bsInitWrite ( EState* );
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extern void
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BZ2_hbAssignCodes ( Int32*, UChar*, Int32, Int32, Int32 );
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extern void
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BZ2_hbMakeCodeLengths ( UChar*, Int32*, Int32, Int32 );
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/*-- states for decompression. --*/
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#define BZ_X_IDLE 1
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#define BZ_X_OUTPUT 2
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#define BZ_X_MAGIC_1 10
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#define BZ_X_MAGIC_2 11
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#define BZ_X_MAGIC_3 12
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#define BZ_X_MAGIC_4 13
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#define BZ_X_BLKHDR_1 14
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#define BZ_X_BLKHDR_2 15
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#define BZ_X_BLKHDR_3 16
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#define BZ_X_BLKHDR_4 17
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#define BZ_X_BLKHDR_5 18
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#define BZ_X_BLKHDR_6 19
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#define BZ_X_BCRC_1 20
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#define BZ_X_BCRC_2 21
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#define BZ_X_BCRC_3 22
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#define BZ_X_BCRC_4 23
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#define BZ_X_RANDBIT 24
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#define BZ_X_ORIGPTR_1 25
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#define BZ_X_ORIGPTR_2 26
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#define BZ_X_ORIGPTR_3 27
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#define BZ_X_MAPPING_1 28
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#define BZ_X_MAPPING_2 29
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#define BZ_X_SELECTOR_1 30
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#define BZ_X_SELECTOR_2 31
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#define BZ_X_SELECTOR_3 32
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#define BZ_X_CODING_1 33
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#define BZ_X_CODING_2 34
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#define BZ_X_CODING_3 35
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#define BZ_X_MTF_1 36
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#define BZ_X_MTF_2 37
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#define BZ_X_MTF_3 38
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#define BZ_X_MTF_4 39
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#define BZ_X_MTF_5 40
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#define BZ_X_MTF_6 41
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#define BZ_X_ENDHDR_2 42
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#define BZ_X_ENDHDR_3 43
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#define BZ_X_ENDHDR_4 44
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#define BZ_X_ENDHDR_5 45
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#define BZ_X_ENDHDR_6 46
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#define BZ_X_CCRC_1 47
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#define BZ_X_CCRC_2 48
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#define BZ_X_CCRC_3 49
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#define BZ_X_CCRC_4 50
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/*-- Constants for the fast MTF decoder. --*/
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#define MTFA_SIZE 4096
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#define MTFL_SIZE 16
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/*-- Structure holding all the decompression-side stuff. --*/
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typedef
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struct {
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/* pointer back to the struct bz_stream */
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bz_stream* strm;
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/* state indicator for this stream */
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Int32 state;
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/* for doing the final run-length decoding */
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UChar state_out_ch;
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Int32 state_out_len;
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Bool blockRandomised;
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BZ_RAND_DECLS;
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/* the buffer for bit stream reading */
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UInt32 bsBuff;
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Int32 bsLive;
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/* misc administratium */
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Int32 blockSize100k;
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Bool smallDecompress;
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Int32 currBlockNo;
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Int32 verbosity;
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/* for undoing the Burrows-Wheeler transform */
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Int32 origPtr;
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UInt32 tPos;
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Int32 k0;
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Int32 unzftab[256];
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Int32 nblock_used;
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Int32 cftab[257];
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Int32 cftabCopy[257];
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/* for undoing the Burrows-Wheeler transform (FAST) */
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UInt32 *tt;
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/* for undoing the Burrows-Wheeler transform (SMALL) */
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UInt16 *ll16;
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UChar *ll4;
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/* stored and calculated CRCs */
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UInt32 storedBlockCRC;
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||
|
|
UInt32 storedCombinedCRC;
|
||
|
|
UInt32 calculatedBlockCRC;
|
||
|
|
UInt32 calculatedCombinedCRC;
|
||
|
|
|
||
|
|
/* map of bytes used in block */
|
||
|
|
Int32 nInUse;
|
||
|
|
Bool inUse[256];
|
||
|
|
Bool inUse16[16];
|
||
|
|
UChar seqToUnseq[256];
|
||
|
|
|
||
|
|
/* for decoding the MTF values */
|
||
|
|
UChar mtfa [MTFA_SIZE];
|
||
|
|
Int32 mtfbase[256 / MTFL_SIZE];
|
||
|
|
UChar selector [BZ_MAX_SELECTORS];
|
||
|
|
UChar selectorMtf[BZ_MAX_SELECTORS];
|
||
|
|
UChar len [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
|
||
|
|
|
||
|
|
Int32 limit [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
|
||
|
|
Int32 base [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
|
||
|
|
Int32 perm [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
|
||
|
|
Int32 minLens[BZ_N_GROUPS];
|
||
|
|
|
||
|
|
/* save area for scalars in the main decompress code */
|
||
|
|
Int32 save_i;
|
||
|
|
Int32 save_j;
|
||
|
|
Int32 save_t;
|
||
|
|
Int32 save_alphaSize;
|
||
|
|
Int32 save_nGroups;
|
||
|
|
Int32 save_nSelectors;
|
||
|
|
Int32 save_EOB;
|
||
|
|
Int32 save_groupNo;
|
||
|
|
Int32 save_groupPos;
|
||
|
|
Int32 save_nextSym;
|
||
|
|
Int32 save_nblockMAX;
|
||
|
|
Int32 save_nblock;
|
||
|
|
Int32 save_es;
|
||
|
|
Int32 save_N;
|
||
|
|
Int32 save_curr;
|
||
|
|
Int32 save_zt;
|
||
|
|
Int32 save_zn;
|
||
|
|
Int32 save_zvec;
|
||
|
|
Int32 save_zj;
|
||
|
|
Int32 save_gSel;
|
||
|
|
Int32 save_gMinlen;
|
||
|
|
Int32* save_gLimit;
|
||
|
|
Int32* save_gBase;
|
||
|
|
Int32* save_gPerm;
|
||
|
|
|
||
|
|
}
|
||
|
|
DState;
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
/*-- Macros for decompression. --*/
|
||
|
|
|
||
|
|
#define BZ_GET_FAST(cccc) \
|
||
|
|
/* c_tPos is unsigned, hence test < 0 is pointless. */ \
|
||
|
|
if (s->tPos >= (UInt32)100000 * (UInt32)s->blockSize100k) return True; \
|
||
|
|
s->tPos = s->tt[s->tPos]; \
|
||
|
|
cccc = (UChar)(s->tPos & 0xff); \
|
||
|
|
s->tPos >>= 8;
|
||
|
|
|
||
|
|
#define BZ_GET_FAST_C(cccc) \
|
||
|
|
/* c_tPos is unsigned, hence test < 0 is pointless. */ \
|
||
|
|
if (c_tPos >= (UInt32)100000 * (UInt32)ro_blockSize100k) return True; \
|
||
|
|
c_tPos = c_tt[c_tPos]; \
|
||
|
|
cccc = (UChar)(c_tPos & 0xff); \
|
||
|
|
c_tPos >>= 8;
|
||
|
|
|
||
|
|
#define SET_LL4(i,n) \
|
||
|
|
{ if (((i) & 0x1) == 0) \
|
||
|
|
s->ll4[(i) >> 1] = (s->ll4[(i) >> 1] & 0xf0) | (n); else \
|
||
|
|
s->ll4[(i) >> 1] = (s->ll4[(i) >> 1] & 0x0f) | ((n) << 4); \
|
||
|
|
}
|
||
|
|
|
||
|
|
#define GET_LL4(i) \
|
||
|
|
((((UInt32)(s->ll4[(i) >> 1])) >> (((i) << 2) & 0x4)) & 0xF)
|
||
|
|
|
||
|
|
#define SET_LL(i,n) \
|
||
|
|
{ s->ll16[i] = (UInt16)(n & 0x0000ffff); \
|
||
|
|
SET_LL4(i, n >> 16); \
|
||
|
|
}
|
||
|
|
|
||
|
|
#define GET_LL(i) \
|
||
|
|
(((UInt32)s->ll16[i]) | (GET_LL4(i) << 16))
|
||
|
|
|
||
|
|
#define BZ_GET_SMALL(cccc) \
|
||
|
|
/* c_tPos is unsigned, hence test < 0 is pointless. */ \
|
||
|
|
if (s->tPos >= (UInt32)100000 * (UInt32)s->blockSize100k) return True; \
|
||
|
|
cccc = BZ2_indexIntoF ( s->tPos, s->cftab ); \
|
||
|
|
s->tPos = GET_LL(s->tPos);
|
||
|
|
|
||
|
|
|
||
|
|
/*-- externs for decompression. --*/
|
||
|
|
|
||
|
|
extern Int32
|
||
|
|
BZ2_indexIntoF ( Int32, Int32* );
|
||
|
|
|
||
|
|
extern Int32
|
||
|
|
BZ2_decompress ( DState* );
|
||
|
|
|
||
|
|
extern void
|
||
|
|
BZ2_hbCreateDecodeTables ( Int32*, Int32*, Int32*, UChar*,
|
||
|
|
Int32, Int32, Int32 );
|
||
|
|
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
/*-- BZ_NO_STDIO seems to make NULL disappear on some platforms. --*/
|
||
|
|
|
||
|
|
#ifdef BZ_NO_STDIO
|
||
|
|
#ifndef NULL
|
||
|
|
#define NULL 0
|
||
|
|
#endif
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifndef WIN32
|
||
|
|
#define _fdopen fdopen
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/*-------------------------------------------------------------*/
|
||
|
|
/*--- end bzlib_private.h ---*/
|
||
|
|
/*-------------------------------------------------------------*/
|