bzlib_private.h
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- /*
- * ===========================================================================
- * PRODUCTION $Log: bzlib_private.h,v $
- * PRODUCTION Revision 1000.1 2004/02/12 21:59:57 gouriano
- * PRODUCTION PRODUCTION: UPGRADED [CORE_001] Dev-tree R1.3
- * PRODUCTION
- * ===========================================================================
- */
- /*-------------------------------------------------------------*/
- /*--- Private header file for the library. ---*/
- /*--- bzlib_private.h ---*/
- /*-------------------------------------------------------------*/
- /*--
- This file is a part of bzip2 and/or libbzip2, a program and
- library for lossless, block-sorting data compression.
- Copyright (C) 1996-2002 Julian R Seward. All rights reserved.
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions
- are met:
- 1. Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- 2. 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.
- 3. Altered source versions must be plainly marked as such, and must
- not be misrepresented as being the original software.
- 4. The name of the author may not be used to endorse or promote
- products derived from this software without specific prior written
- permission.
- THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
- OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
- WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
- DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
- GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- Julian Seward, Cambridge, UK.
- jseward@acm.org
- bzip2/libbzip2 version 1.0 of 21 March 2000
- This program is based on (at least) the work of:
- Mike Burrows
- David Wheeler
- Peter Fenwick
- Alistair Moffat
- Radford Neal
- Ian H. Witten
- Robert Sedgewick
- Jon L. Bentley
- For more information on these sources, see the manual.
- --*/
- #ifndef _BZLIB_PRIVATE_H
- #define _BZLIB_PRIVATE_H
- #include <stdlib.h>
- #ifndef BZ_NO_STDIO
- #include <stdio.h>
- #include <ctype.h>
- #include <string.h>
- #endif
- #include "bzlib.h"
- /*-- General stuff. --*/
- #define BZ_VERSION "1.0.2, 30-Dec-2001"
- typedef char Char;
- typedef unsigned char Bool;
- typedef unsigned char UChar;
- typedef int Int32;
- typedef unsigned int UInt32;
- typedef short Int16;
- typedef unsigned short UInt16;
- #define True ((Bool)1)
- #define False ((Bool)0)
- #ifndef __GNUC__
- #define __inline__ /* */
- #endif
- #ifndef BZ_NO_STDIO
- extern void BZ2_bz__AssertH__fail ( int errcode );
- #define AssertH(cond,errcode)
- { if (!(cond)) BZ2_bz__AssertH__fail ( errcode ); }
- #if BZ_DEBUG
- #define AssertD(cond,msg)
- { if (!(cond)) {
- fprintf ( stderr,
- "nnlibbzip2(debug build): internal errornt%sn", msg );
- exit(1);
- }}
- #else
- #define AssertD(cond,msg) /* */
- #endif
- #define VPrintf0(zf)
- fprintf(stderr,zf)
- #define VPrintf1(zf,za1)
- fprintf(stderr,zf,za1)
- #define VPrintf2(zf,za1,za2)
- fprintf(stderr,zf,za1,za2)
- #define VPrintf3(zf,za1,za2,za3)
- fprintf(stderr,zf,za1,za2,za3)
- #define VPrintf4(zf,za1,za2,za3,za4)
- fprintf(stderr,zf,za1,za2,za3,za4)
- #define VPrintf5(zf,za1,za2,za3,za4,za5)
- fprintf(stderr,zf,za1,za2,za3,za4,za5)
- #else
- extern void bz_internal_error ( int errcode );
- #define AssertH(cond,errcode)
- { if (!(cond)) bz_internal_error ( errcode ); }
- #define AssertD(cond,msg) /* */
- #define VPrintf0(zf) /* */
- #define VPrintf1(zf,za1) /* */
- #define VPrintf2(zf,za1,za2) /* */
- #define VPrintf3(zf,za1,za2,za3) /* */
- #define VPrintf4(zf,za1,za2,za3,za4) /* */
- #define VPrintf5(zf,za1,za2,za3,za4,za5) /* */
- #endif
- #define BZALLOC(nnn) (strm->bzalloc)(strm->opaque,(nnn),1)
- #define BZFREE(ppp) (strm->bzfree)(strm->opaque,(ppp))
- /*-- Header bytes. --*/
- #define BZ_HDR_B 0x42 /* 'B' */
- #define BZ_HDR_Z 0x5a /* 'Z' */
- #define BZ_HDR_h 0x68 /* 'h' */
- #define BZ_HDR_0 0x30 /* '0' */
-
- /*-- Constants for the back end. --*/
- #define BZ_MAX_ALPHA_SIZE 258
- #define BZ_MAX_CODE_LEN 23
- #define BZ_RUNA 0
- #define BZ_RUNB 1
- #define BZ_N_GROUPS 6
- #define BZ_G_SIZE 50
- #define BZ_N_ITERS 4
- #define BZ_MAX_SELECTORS (2 + (900000 / BZ_G_SIZE))
- /*-- Stuff for randomising repetitive blocks. --*/
- extern Int32 BZ2_rNums[512];
- #define BZ_RAND_DECLS
- Int32 rNToGo;
- Int32 rTPos
- #define BZ_RAND_INIT_MASK
- s->rNToGo = 0;
- s->rTPos = 0
- #define BZ_RAND_MASK ((s->rNToGo == 1) ? 1 : 0)
- #define BZ_RAND_UPD_MASK
- if (s->rNToGo == 0) {
- s->rNToGo = BZ2_rNums[s->rTPos];
- s->rTPos++;
- if (s->rTPos == 512) s->rTPos = 0;
- }
- s->rNToGo--;
- /*-- Stuff for doing CRCs. --*/
- extern UInt32 BZ2_crc32Table[256];
- #define BZ_INITIALISE_CRC(crcVar)
- {
- crcVar = 0xffffffffL;
- }
- #define BZ_FINALISE_CRC(crcVar)
- {
- crcVar = ~(crcVar);
- }
- #define BZ_UPDATE_CRC(crcVar,cha)
- {
- crcVar = (crcVar << 8) ^
- BZ2_crc32Table[(crcVar >> 24) ^
- ((UChar)cha)];
- }
- /*-- States and modes for compression. --*/
- #define BZ_M_IDLE 1
- #define BZ_M_RUNNING 2
- #define BZ_M_FLUSHING 3
- #define BZ_M_FINISHING 4
- #define BZ_S_OUTPUT 1
- #define BZ_S_INPUT 2
- #define BZ_N_RADIX 2
- #define BZ_N_QSORT 12
- #define BZ_N_SHELL 18
- #define BZ_N_OVERSHOOT (BZ_N_RADIX + BZ_N_QSORT + BZ_N_SHELL + 2)
- /*-- Structure holding all the compression-side stuff. --*/
- typedef
- struct {
- /* pointer back to the struct bz_stream */
- bz_stream* strm;
- /* mode this stream is in, and whether inputting */
- /* or outputting data */
- Int32 mode;
- Int32 state;
- /* remembers avail_in when flush/finish requested */
- UInt32 avail_in_expect;
- /* for doing the block sorting */
- UInt32* arr1;
- UInt32* arr2;
- UInt32* ftab;
- Int32 origPtr;
- /* aliases for arr1 and arr2 */
- UInt32* ptr;
- UChar* block;
- UInt16* mtfv;
- UChar* zbits;
- /* for deciding when to use the fallback sorting algorithm */
- Int32 workFactor;
- /* run-length-encoding of the input */
- UInt32 state_in_ch;
- Int32 state_in_len;
- BZ_RAND_DECLS;
- /* input and output limits and current posns */
- Int32 nblock;
- Int32 nblockMAX;
- Int32 numZ;
- Int32 state_out_pos;
- /* map of bytes used in block */
- Int32 nInUse;
- Bool inUse[256];
- UChar unseqToSeq[256];
- /* the buffer for bit stream creation */
- UInt32 bsBuff;
- Int32 bsLive;
- /* block and combined CRCs */
- UInt32 blockCRC;
- UInt32 combinedCRC;
- /* misc administratium */
- Int32 verbosity;
- Int32 blockNo;
- Int32 blockSize100k;
- /* stuff for coding the MTF values */
- Int32 nMTF;
- Int32 mtfFreq [BZ_MAX_ALPHA_SIZE];
- UChar selector [BZ_MAX_SELECTORS];
- UChar selectorMtf[BZ_MAX_SELECTORS];
- UChar len [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
- Int32 code [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
- Int32 rfreq [BZ_N_GROUPS][BZ_MAX_ALPHA_SIZE];
- /* second dimension: only 3 needed; 4 makes index calculations faster */
- UInt32 len_pack[BZ_MAX_ALPHA_SIZE][4];
- }
- EState;
- /*-- externs for compression. --*/
- extern void
- BZ2_blockSort ( EState* );
- extern void
- BZ2_compressBlock ( EState*, Bool );
- extern void
- BZ2_bsInitWrite ( EState* );
- extern void
- BZ2_hbAssignCodes ( Int32*, UChar*, Int32, Int32, Int32 );
- extern void
- BZ2_hbMakeCodeLengths ( UChar*, Int32*, Int32, Int32 );
- /*-- states for decompression. --*/
- #define BZ_X_IDLE 1
- #define BZ_X_OUTPUT 2
- #define BZ_X_MAGIC_1 10
- #define BZ_X_MAGIC_2 11
- #define BZ_X_MAGIC_3 12
- #define BZ_X_MAGIC_4 13
- #define BZ_X_BLKHDR_1 14
- #define BZ_X_BLKHDR_2 15
- #define BZ_X_BLKHDR_3 16
- #define BZ_X_BLKHDR_4 17
- #define BZ_X_BLKHDR_5 18
- #define BZ_X_BLKHDR_6 19
- #define BZ_X_BCRC_1 20
- #define BZ_X_BCRC_2 21
- #define BZ_X_BCRC_3 22
- #define BZ_X_BCRC_4 23
- #define BZ_X_RANDBIT 24
- #define BZ_X_ORIGPTR_1 25
- #define BZ_X_ORIGPTR_2 26
- #define BZ_X_ORIGPTR_3 27
- #define BZ_X_MAPPING_1 28
- #define BZ_X_MAPPING_2 29
- #define BZ_X_SELECTOR_1 30
- #define BZ_X_SELECTOR_2 31
- #define BZ_X_SELECTOR_3 32
- #define BZ_X_CODING_1 33
- #define BZ_X_CODING_2 34
- #define BZ_X_CODING_3 35
- #define BZ_X_MTF_1 36
- #define BZ_X_MTF_2 37
- #define BZ_X_MTF_3 38
- #define BZ_X_MTF_4 39
- #define BZ_X_MTF_5 40
- #define BZ_X_MTF_6 41
- #define BZ_X_ENDHDR_2 42
- #define BZ_X_ENDHDR_3 43
- #define BZ_X_ENDHDR_4 44
- #define BZ_X_ENDHDR_5 45
- #define BZ_X_ENDHDR_6 46
- #define BZ_X_CCRC_1 47
- #define BZ_X_CCRC_2 48
- #define BZ_X_CCRC_3 49
- #define BZ_X_CCRC_4 50
- /*-- Constants for the fast MTF decoder. --*/
- #define MTFA_SIZE 4096
- #define MTFL_SIZE 16
- /*-- Structure holding all the decompression-side stuff. --*/
- typedef
- struct {
- /* pointer back to the struct bz_stream */
- bz_stream* strm;
- /* state indicator for this stream */
- Int32 state;
- /* for doing the final run-length decoding */
- UChar state_out_ch;
- Int32 state_out_len;
- Bool blockRandomised;
- BZ_RAND_DECLS;
- /* the buffer for bit stream reading */
- UInt32 bsBuff;
- Int32 bsLive;
- /* misc administratium */
- Int32 blockSize100k;
- Bool smallDecompress;
- Int32 currBlockNo;
- Int32 verbosity;
- /* for undoing the Burrows-Wheeler transform */
- Int32 origPtr;
- UInt32 tPos;
- Int32 k0;
- Int32 unzftab[256];
- Int32 nblock_used;
- Int32 cftab[257];
- Int32 cftabCopy[257];
- /* for undoing the Burrows-Wheeler transform (FAST) */
- UInt32 *tt;
- /* for undoing the Burrows-Wheeler transform (SMALL) */
- UInt16 *ll16;
- UChar *ll4;
- /* stored and calculated CRCs */
- UInt32 storedBlockCRC;
- 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)
- s->tPos = s->tt[s->tPos];
- cccc = (UChar)(s->tPos & 0xff);
- s->tPos >>= 8;
- #define BZ_GET_FAST_C(cccc)
- 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)
- 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
- /*-------------------------------------------------------------*/
- /*--- end bzlib_private.h ---*/
- /*-------------------------------------------------------------*/