/*-------------------------------------------------------------*/ /*--- Private header file for the library. ---*/ /*--- bzlib_private.h ---*/ /*-------------------------------------------------------------*/ /* ------------------------------------------------------------------ This file is part of bzip2/libbzip2, a program and library for lossless, block-sorting data compression. bzip2/libbzip2 version 1.0.6 of 6 September 2010 Copyright (C) 1996-2010 Julian Seward Please read the WARNING, DISCLAIMER and PATENTS sections in the README file. This program is released under the terms of the license contained in the file LICENSE. ------------------------------------------------------------------ */ #ifndef _BZLIB_PRIVATE_H #define _BZLIB_PRIVATE_H #include #ifndef BZ_NO_STDIO #include #include #include #endif #include "bzlib.h" /*-- General stuff. --*/ 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, \ "\n\nlibbzip2(debug build): internal error\n\t%s\n", 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) do { } while (0) #define VPrintf0(zf) do { } while (0) #define VPrintf1(zf,za1) do { } while (0) #define VPrintf2(zf,za1,za2) do { } while (0) #define VPrintf3(zf,za1,za2,za3) do { } while (0) #define VPrintf4(zf,za1,za2,za3,za4) do { } while (0) #define VPrintf5(zf,za1,za2,za3,za4,za5) do { } while (0) #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) \ /* 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 /*-------------------------------------------------------------*/ /*--- end bzlib_private.h ---*/ /*-------------------------------------------------------------*/