bzip2-0.9.0cbzip2-0.9.0c

1 files changed, 523 insertions, 0 deletions

diff --git a/bzlib_private.h b/bzlib_private.h
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+
+/*-------------------------------------------------------------*/
+/*--- 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) 1996-1998 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, Guildford, Surrey, UK.
+  jseward@acm.org
+  bzip2/libbzip2 version 0.9.0c of 18 October 1998
+
+  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  "0.9.0c"
+
+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 bz__AssertH__fail ( int errcode );
+#define AssertH(cond,errcode) \
+   { if (!(cond)) 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) /* */
+#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))
+
+
+/*-- 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 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 = rNums[s->rTPos];             \
+      s->rTPos++;                              \
+      if (s->rTPos == 512) s->rTPos = 0;       \
+   }                                           \
+   s->rNToGo--;
+
+
+
+/*-- Stuff for doing CRCs. --*/
+
+extern UInt32 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) ^                    \
+            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_NUM_OVERSHOOT_BYTES 20
+
+
+
+/*-- 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 */
+      UChar*   block;
+      UInt16*  quadrant;
+      UInt32*  zptr;
+      UInt16*  szptr;
+      Int32*   ftab;
+      Int32    workDone;
+      Int32    workLimit;
+      Int32    workFactor;
+      Bool     firstAttempt;
+      Bool     blockRandomised;
+      Int32    origPtr;
+
+      /* 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    nBlocksRandomised;
+      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];
+
+   }
+   EState;
+
+
+
+/*-- externs for compression. --*/
+
+extern void 
+blockSort ( EState* );
+
+extern void 
+compressBlock ( EState*, Bool );
+
+extern void 
+bsInitWrite ( EState* );
+
+extern void 
+hbAssignCodes ( Int32*, UChar*, Int32, Int32, Int32 );
+
+extern void 
+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 = indexIntoF ( s->tPos, s->cftab );    \
+      s->tPos = GET_LL(s->tPos);
+
+
+/*-- externs for decompression. --*/
+
+extern Int32 
+indexIntoF ( Int32, Int32* );
+
+extern Int32 
+decompress ( DState* );
+
+extern void 
+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 ---*/
+/*-------------------------------------------------------------*/