1123 lines
36 KiB
C
1123 lines
36 KiB
C
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/*-------------------------------------------------------------*/
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/*--- Library top-level functions. ---*/
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/*--- bzlib.c ---*/
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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 1.0.4 of 20 December 2006
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Copyright (C) 1996-2006 Julian Seward <jseward@bzip.org>
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This file was modified for ClamAV by aCaB <acab@clamav.net>
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This program is released under the terms of the license contained
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in the file COPYING.bzip2.
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------------------------------------------------------------------ */
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/* CHANGES
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0.9.0 -- original version.
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0.9.0a/b -- no changes in this file.
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0.9.0c -- made zero-length BZ_FLUSH work correctly in bzCompress().
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fixed bzWrite/bzRead to ignore zero-length requests.
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fixed bzread to correctly handle read requests after EOF.
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wrong parameter order in call to bzDecompressInit in
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bzBuffToBuffDecompress. Fixed.
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*/
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#if HAVE_CONFIG_H
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#include "clamav-config.h"
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#endif
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#include "clamav.h"
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#include "bzlib_private.h"
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#include "others.h"
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/*---------------------------------------------------*/
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static
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void makeMaps_d ( DState* s )
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{
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Int32 i;
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s->nInUse = 0;
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for (i = 0; i < 256; i++)
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if (s->inUse[i]) {
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s->seqToUnseq[s->nInUse] = i;
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s->nInUse++;
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}
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}
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/*---------------------------------------------------*/
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#define RETURN(rrr) \
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{ retVal = rrr; goto save_state_and_return; };
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#define GET_BITS(lll,vvv,nnn) \
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case lll: s->state = lll; \
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while (True) { \
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if (s->bsLive >= nnn) { \
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UInt32 v; \
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v = (s->bsBuff >> \
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(s->bsLive-nnn)) & ((1 << nnn)-1); \
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s->bsLive -= nnn; \
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vvv = v; \
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break; \
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} \
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if (s->strm->avail_in == 0) RETURN(BZ_OK); \
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s->bsBuff \
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= (s->bsBuff << 8) | \
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((UInt32) \
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(*(s->strm->next_in))); \
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s->bsLive += 8; \
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s->strm->next_in++; \
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s->strm->avail_in--; \
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s->strm->total_in_lo32++; \
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if (s->strm->total_in_lo32 == 0) \
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s->strm->total_in_hi32++; \
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}
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#define GET_UCHAR(lll,uuu) \
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GET_BITS(lll,uuu,8)
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#define GET_BIT(lll,uuu) \
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GET_BITS(lll,uuu,1)
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/*---------------------------------------------------*/
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#define GET_MTF_VAL(label1,label2,lval) \
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{ \
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if (groupPos == 0) { \
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groupNo++; \
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if (groupNo >= nSelectors) \
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RETURN(BZ_DATA_ERROR); \
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groupPos = BZ_G_SIZE; \
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gSel = s->selector[groupNo]; \
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gMinlen = s->minLens[gSel]; \
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gLimit = &(s->limit[gSel][0]); \
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gPerm = &(s->perm[gSel][0]); \
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gBase = &(s->base[gSel][0]); \
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} \
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groupPos--; \
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zn = gMinlen; \
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GET_BITS(label1, zvec, zn); \
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while (1) { \
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if (zn > 20 /* the longest code */) \
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RETURN(BZ_DATA_ERROR); \
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if (zvec <= gLimit[zn]) break; \
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zn++; \
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GET_BIT(label2, zj); \
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zvec = (zvec << 1) | zj; \
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}; \
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if (zvec - gBase[zn] < 0 \
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|| zvec - gBase[zn] >= BZ_MAX_ALPHA_SIZE) \
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RETURN(BZ_DATA_ERROR); \
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lval = gPerm[zvec - gBase[zn]]; \
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}
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/*---------------------------------------------------*/
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inline static Int32 indexIntoF ( Int32 indx, Int32 *cftab )
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{
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Int32 nb, na, mid;
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nb = 0;
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na = 256;
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do {
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mid = (nb + na) >> 1;
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if (indx >= cftab[mid]) nb = mid; else na = mid;
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}
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while (na - nb != 1);
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return nb;
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}
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/*---------------------------------------------------*/
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/* Return True iff data corruption is discovered.
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Returns False if there is no problem.
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*/
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static
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Bool unRLE_obuf_to_output_FAST ( DState* s )
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{
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UChar k1;
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/* if (s->blockRandomised) { */
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/* while (True) { */
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/* /\* try to finish existing run *\/ */
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/* while (True) { */
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/* if (s->strm->avail_out == 0) return False; */
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/* if (s->state_out_len == 0) break; */
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/* *( (UChar*)(s->strm->next_out) ) = s->state_out_ch; */
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/* BZ_UPDATE_CRC ( s->calculatedBlockCRC, s->state_out_ch ); */
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/* s->state_out_len--; */
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/* s->strm->next_out++; */
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/* s->strm->avail_out--; */
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/* s->strm->total_out_lo32++; */
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/* if (s->strm->total_out_lo32 == 0) s->strm->total_out_hi32++; */
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/* } */
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/* /\* can a new run be started? *\/ */
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/* if (s->nblock_used == s->save_nblock+1) return False; */
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/* /\* Only caused by corrupt data stream? *\/ */
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/* if (s->nblock_used > s->save_nblock+1) */
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/* return True; */
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/* s->state_out_len = 1; */
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/* s->state_out_ch = s->k0; */
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/* BZ_GET_FAST(k1); BZ_RAND_UPD_MASK; */
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/* k1 ^= BZ_RAND_MASK; s->nblock_used++; */
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/* if (s->nblock_used == s->save_nblock+1) continue; */
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/* if (k1 != s->k0) { s->k0 = k1; continue; }; */
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/* s->state_out_len = 2; */
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/* BZ_GET_FAST(k1); BZ_RAND_UPD_MASK; */
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/* k1 ^= BZ_RAND_MASK; s->nblock_used++; */
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/* if (s->nblock_used == s->save_nblock+1) continue; */
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/* if (k1 != s->k0) { s->k0 = k1; continue; }; */
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/* s->state_out_len = 3; */
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/* BZ_GET_FAST(k1); BZ_RAND_UPD_MASK; */
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/* k1 ^= BZ_RAND_MASK; s->nblock_used++; */
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/* if (s->nblock_used == s->save_nblock+1) continue; */
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/* if (k1 != s->k0) { s->k0 = k1; continue; }; */
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/* BZ_GET_FAST(k1); BZ_RAND_UPD_MASK; */
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/* k1 ^= BZ_RAND_MASK; s->nblock_used++; */
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/* s->state_out_len = ((Int32)k1) + 4; */
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/* BZ_GET_FAST(s->k0); BZ_RAND_UPD_MASK; */
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/* s->k0 ^= BZ_RAND_MASK; s->nblock_used++; */
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/* } */
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/* } else */ {
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/* restore */
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UInt32 c_calculatedBlockCRC = s->calculatedBlockCRC;
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UChar c_state_out_ch = s->state_out_ch;
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Int32 c_state_out_len = s->state_out_len;
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Int32 c_nblock_used = s->nblock_used;
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Int32 c_k0 = s->k0;
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UInt32* c_tt = s->tt;
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UInt32 c_tPos = s->tPos;
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UChar* cs_next_out = s->strm->next_out;
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unsigned int cs_avail_out = s->strm->avail_out;
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Int32 ro_blockSize100k = s->blockSize100k;
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/* end restore */
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UInt32 avail_out_INIT = cs_avail_out;
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Int32 s_save_nblockPP = s->save_nblock+1;
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unsigned int total_out_lo32_old;
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while (True) {
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/* try to finish existing run */
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if (c_state_out_len > 0) {
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while (True) {
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if (cs_avail_out == 0) goto return_notr;
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if (c_state_out_len == 1) break;
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*cs_next_out = c_state_out_ch;
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/* aCaB BZ_UPDATE_CRC ( c_calculatedBlockCRC, c_state_out_ch ); */
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c_state_out_len--;
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cs_next_out++;
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cs_avail_out--;
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}
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s_state_out_len_eq_one:
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{
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if (cs_avail_out == 0) {
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c_state_out_len = 1; goto return_notr;
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};
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*cs_next_out = c_state_out_ch;
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/* aCaB BZ_UPDATE_CRC ( c_calculatedBlockCRC, c_state_out_ch ); */
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cs_next_out++;
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cs_avail_out--;
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}
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}
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/* Only caused by corrupt data stream? */
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if (c_nblock_used > s_save_nblockPP)
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return True;
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/* can a new run be started? */
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if (c_nblock_used == s_save_nblockPP) {
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c_state_out_len = 0; goto return_notr;
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};
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c_state_out_ch = c_k0;
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BZ_GET_FAST_C(k1); c_nblock_used++;
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if (k1 != c_k0) {
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c_k0 = k1; goto s_state_out_len_eq_one;
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};
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if (c_nblock_used == s_save_nblockPP)
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goto s_state_out_len_eq_one;
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c_state_out_len = 2;
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BZ_GET_FAST_C(k1); c_nblock_used++;
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if (c_nblock_used == s_save_nblockPP) continue;
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if (k1 != c_k0) { c_k0 = k1; continue; };
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c_state_out_len = 3;
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BZ_GET_FAST_C(k1); c_nblock_used++;
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if (c_nblock_used == s_save_nblockPP) continue;
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if (k1 != c_k0) { c_k0 = k1; continue; };
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BZ_GET_FAST_C(k1); c_nblock_used++;
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c_state_out_len = ((Int32)k1) + 4;
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BZ_GET_FAST_C(c_k0); c_nblock_used++;
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}
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return_notr:
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total_out_lo32_old = s->strm->total_out_lo32;
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s->strm->total_out_lo32 += (avail_out_INIT - cs_avail_out);
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if (s->strm->total_out_lo32 < total_out_lo32_old)
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s->strm->total_out_hi32++;
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/* save */
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s->calculatedBlockCRC = c_calculatedBlockCRC;
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s->state_out_ch = c_state_out_ch;
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s->state_out_len = c_state_out_len;
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s->nblock_used = c_nblock_used;
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s->k0 = c_k0;
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s->tt = c_tt;
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s->tPos = c_tPos;
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s->strm->next_out = cs_next_out;
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s->strm->avail_out = cs_avail_out;
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/* end save */
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}
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return False;
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}
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/*---------------------------------------------------*/
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/* Return True iff data corruption is discovered.
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Returns False if there is no problem.
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*/
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static
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Bool unRLE_obuf_to_output_SMALL ( DState* s )
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{
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UChar k1;
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/* if (s->blockRandomised) { */
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/* while (True) { */
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/* /\* try to finish existing run *\/ */
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/* while (True) { */
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/* if (s->strm->avail_out == 0) return False; */
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/* if (s->state_out_len == 0) break; */
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/* *( (UChar*)(s->strm->next_out) ) = s->state_out_ch; */
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/* BZ_UPDATE_CRC ( s->calculatedBlockCRC, s->state_out_ch ); */
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/* s->state_out_len--; */
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/* s->strm->next_out++; */
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/* s->strm->avail_out--; */
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/* s->strm->total_out_lo32++; */
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/* if (s->strm->total_out_lo32 == 0) s->strm->total_out_hi32++; */
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/* } */
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/* /\* can a new run be started? *\/ */
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/* if (s->nblock_used == s->save_nblock+1) return False; */
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/* /\* Only caused by corrupt data stream? *\/ */
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/* if (s->nblock_used > s->save_nblock+1) */
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/* return True; */
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/* s->state_out_len = 1; */
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/* s->state_out_ch = s->k0; */
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/* BZ_GET_SMALL(k1); BZ_RAND_UPD_MASK; */
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/* k1 ^= BZ_RAND_MASK; s->nblock_used++; */
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/* if (s->nblock_used == s->save_nblock+1) continue; */
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/* if (k1 != s->k0) { s->k0 = k1; continue; }; */
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/* s->state_out_len = 2; */
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/* BZ_GET_SMALL(k1); BZ_RAND_UPD_MASK; */
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/* k1 ^= BZ_RAND_MASK; s->nblock_used++; */
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/* if (s->nblock_used == s->save_nblock+1) continue; */
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/* if (k1 != s->k0) { s->k0 = k1; continue; }; */
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/* s->state_out_len = 3; */
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/* BZ_GET_SMALL(k1); BZ_RAND_UPD_MASK; */
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/* k1 ^= BZ_RAND_MASK; s->nblock_used++; */
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/* if (s->nblock_used == s->save_nblock+1) continue; */
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/* if (k1 != s->k0) { s->k0 = k1; continue; }; */
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/* BZ_GET_SMALL(k1); BZ_RAND_UPD_MASK; */
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/* k1 ^= BZ_RAND_MASK; s->nblock_used++; */
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/* s->state_out_len = ((Int32)k1) + 4; */
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/* BZ_GET_SMALL(s->k0); BZ_RAND_UPD_MASK; */
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/* s->k0 ^= BZ_RAND_MASK; s->nblock_used++; */
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/* } */
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/* } else */ {
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while (True) {
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/* try to finish existing run */
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while (True) {
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if (s->strm->avail_out == 0) return False;
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if (s->state_out_len == 0) break;
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*(s->strm->next_out) = s->state_out_ch;
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/* aCaB BZ_UPDATE_CRC ( s->calculatedBlockCRC, s->state_out_ch ); */
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s->state_out_len--;
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s->strm->next_out++;
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s->strm->avail_out--;
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s->strm->total_out_lo32++;
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if (s->strm->total_out_lo32 == 0) s->strm->total_out_hi32++;
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}
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/* can a new run be started? */
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if (s->nblock_used == s->save_nblock+1) return False;
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/* Only caused by corrupt data stream? */
|
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if (s->nblock_used > s->save_nblock+1)
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return True;
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|
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s->state_out_len = 1;
|
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s->state_out_ch = s->k0;
|
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BZ_GET_SMALL(k1); s->nblock_used++;
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if (s->nblock_used == s->save_nblock+1) continue;
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if (k1 != s->k0) { s->k0 = k1; continue; };
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s->state_out_len = 2;
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BZ_GET_SMALL(k1); s->nblock_used++;
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if (s->nblock_used == s->save_nblock+1) continue;
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if (k1 != s->k0) { s->k0 = k1; continue; };
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|
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s->state_out_len = 3;
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BZ_GET_SMALL(k1); s->nblock_used++;
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if (s->nblock_used == s->save_nblock+1) continue;
|
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if (k1 != s->k0) { s->k0 = k1; continue; };
|
|
|
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BZ_GET_SMALL(k1); s->nblock_used++;
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s->state_out_len = ((Int32)k1) + 4;
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BZ_GET_SMALL(s->k0); s->nblock_used++;
|
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}
|
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|
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}
|
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}
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/*---------------------------------------------------*/
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|
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static void CreateDecodeTables ( Int32 *limit,
|
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Int32 *base,
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Int32 *perm,
|
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UChar *length,
|
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Int32 minLen,
|
|
Int32 maxLen,
|
|
Int32 alphaSize )
|
|
{
|
|
Int32 pp, i, j, vec;
|
|
|
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pp = 0;
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|
for (i = minLen; i <= maxLen; i++)
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for (j = 0; j < alphaSize; j++)
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if (length[j] == i) { perm[pp] = j; pp++; };
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|
|
|
for (i = 0; i < BZ_MAX_CODE_LEN; i++) base[i] = 0;
|
|
for (i = 0; i < alphaSize; i++) base[length[i]+1]++;
|
|
|
|
for (i = 1; i < BZ_MAX_CODE_LEN; i++) base[i] += base[i-1];
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|
|
|
for (i = 0; i < BZ_MAX_CODE_LEN; i++) limit[i] = 0;
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|
vec = 0;
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|
|
|
for (i = minLen; i <= maxLen; i++) {
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vec += (base[i+1] - base[i]);
|
|
limit[i] = vec-1;
|
|
vec <<= 1;
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}
|
|
for (i = minLen + 1; i <= maxLen; i++)
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base[i] = ((limit[i-1] + 1) << 1) - base[i];
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|
}
|
|
|
|
/*---------------------------------------------------*/
|
|
static Int32 BZ2_decompress ( DState* s )
|
|
{
|
|
UChar uc;
|
|
Int32 retVal;
|
|
Int32 minLen, maxLen;
|
|
nsis_bzstream* strm = s->strm;
|
|
|
|
/* stuff that needs to be saved/restored */
|
|
Int32 i;
|
|
Int32 j;
|
|
Int32 t;
|
|
Int32 alphaSize;
|
|
Int32 nGroups;
|
|
Int32 nSelectors;
|
|
Int32 EOB;
|
|
Int32 groupNo;
|
|
Int32 groupPos;
|
|
Int32 nextSym;
|
|
Int32 nblockMAX;
|
|
Int32 nblock;
|
|
Int32 es;
|
|
Int32 N;
|
|
Int32 curr;
|
|
Int32 zt;
|
|
Int32 zn;
|
|
Int32 zvec;
|
|
Int32 zj;
|
|
Int32 gSel;
|
|
Int32 gMinlen;
|
|
Int32* gLimit;
|
|
Int32* gBase;
|
|
Int32* gPerm;
|
|
|
|
if (s->state == BZ_X_MAGIC_1) {
|
|
/*initialise the save area*/
|
|
s->save_i = 0;
|
|
s->save_j = 0;
|
|
s->save_t = 0;
|
|
s->save_alphaSize = 0;
|
|
s->save_nGroups = 0;
|
|
s->save_nSelectors = 0;
|
|
s->save_EOB = 0;
|
|
s->save_groupNo = 0;
|
|
s->save_groupPos = 0;
|
|
s->save_nextSym = 0;
|
|
s->save_nblockMAX = 0;
|
|
s->save_nblock = 0;
|
|
s->save_es = 0;
|
|
s->save_N = 0;
|
|
s->save_curr = 0;
|
|
s->save_zt = 0;
|
|
s->save_zn = 0;
|
|
s->save_zvec = 0;
|
|
s->save_zj = 0;
|
|
s->save_gSel = 0;
|
|
s->save_gMinlen = 0;
|
|
s->save_gLimit = NULL;
|
|
s->save_gBase = NULL;
|
|
s->save_gPerm = NULL;
|
|
}
|
|
|
|
/*restore from the save area*/
|
|
i = s->save_i;
|
|
j = s->save_j;
|
|
t = s->save_t;
|
|
alphaSize = s->save_alphaSize;
|
|
nGroups = s->save_nGroups;
|
|
nSelectors = s->save_nSelectors;
|
|
EOB = s->save_EOB;
|
|
groupNo = s->save_groupNo;
|
|
groupPos = s->save_groupPos;
|
|
nextSym = s->save_nextSym;
|
|
nblockMAX = s->save_nblockMAX;
|
|
nblock = s->save_nblock;
|
|
es = s->save_es;
|
|
N = s->save_N;
|
|
curr = s->save_curr;
|
|
zt = s->save_zt;
|
|
zn = s->save_zn;
|
|
zvec = s->save_zvec;
|
|
zj = s->save_zj;
|
|
gSel = s->save_gSel;
|
|
gMinlen = s->save_gMinlen;
|
|
gLimit = s->save_gLimit;
|
|
gBase = s->save_gBase;
|
|
gPerm = s->save_gPerm;
|
|
|
|
retVal = BZ_OK;
|
|
|
|
switch (s->state) {
|
|
|
|
/* aCaB
|
|
GET_UCHAR(BZ_X_MAGIC_1, uc);
|
|
if (uc != BZ_HDR_B) RETURN(BZ_DATA_ERROR_MAGIC);
|
|
|
|
GET_UCHAR(BZ_X_MAGIC_2, uc);
|
|
if (uc != BZ_HDR_Z) RETURN(BZ_DATA_ERROR_MAGIC);
|
|
|
|
GET_UCHAR(BZ_X_MAGIC_3, uc)
|
|
if (uc != BZ_HDR_h) RETURN(BZ_DATA_ERROR_MAGIC);
|
|
|
|
GET_BITS(BZ_X_MAGIC_4, s->blockSize100k, 8)
|
|
if (s->blockSize100k < (BZ_HDR_0 + 1) ||
|
|
s->blockSize100k > (BZ_HDR_0 + 9)) RETURN(BZ_DATA_ERROR_MAGIC);
|
|
s->blockSize100k -= BZ_HDR_0;
|
|
*/
|
|
|
|
case BZ_X_MAGIC_1:
|
|
|
|
s->blockSize100k = 9;
|
|
|
|
if (s->smallDecompress) {
|
|
s->ll16 = BZALLOC( s->blockSize100k * 100000 * sizeof(UInt16) );
|
|
s->ll4 = BZALLOC(
|
|
((1 + s->blockSize100k * 100000) >> 1) * sizeof(UChar)
|
|
);
|
|
if (s->ll16 == NULL || s->ll4 == NULL) RETURN(BZ_MEM_ERROR);
|
|
} else {
|
|
s->tt = BZALLOC( s->blockSize100k * 100000 * sizeof(Int32) );
|
|
if (s->tt == NULL) RETURN(BZ_MEM_ERROR);
|
|
}
|
|
|
|
GET_UCHAR(BZ_X_BLKHDR_1, uc);
|
|
|
|
if (uc == 0x17) goto endhdr_2;
|
|
if (uc != 0x31) RETURN(BZ_DATA_ERROR);
|
|
|
|
/* aCaB
|
|
GET_UCHAR(BZ_X_BLKHDR_2, uc);
|
|
if (uc != 0x41) RETURN(BZ_DATA_ERROR);
|
|
GET_UCHAR(BZ_X_BLKHDR_3, uc);
|
|
if (uc != 0x59) RETURN(BZ_DATA_ERROR);
|
|
GET_UCHAR(BZ_X_BLKHDR_4, uc);
|
|
if (uc != 0x26) RETURN(BZ_DATA_ERROR);
|
|
GET_UCHAR(BZ_X_BLKHDR_5, uc);
|
|
if (uc != 0x53) RETURN(BZ_DATA_ERROR);
|
|
GET_UCHAR(BZ_X_BLKHDR_6, uc);
|
|
if (uc != 0x59) RETURN(BZ_DATA_ERROR);
|
|
|
|
s->currBlockNo++;
|
|
if (s->verbosity >= 2)
|
|
VPrintf1 ( "\n [%d: huff+mtf ", s->currBlockNo );
|
|
|
|
s->storedBlockCRC = 0;
|
|
GET_UCHAR(BZ_X_BCRC_1, uc);
|
|
s->storedBlockCRC = (s->storedBlockCRC << 8) | ((UInt32)uc);
|
|
GET_UCHAR(BZ_X_BCRC_2, uc);
|
|
s->storedBlockCRC = (s->storedBlockCRC << 8) | ((UInt32)uc);
|
|
GET_UCHAR(BZ_X_BCRC_3, uc);
|
|
s->storedBlockCRC = (s->storedBlockCRC << 8) | ((UInt32)uc);
|
|
GET_UCHAR(BZ_X_BCRC_4, uc);
|
|
s->storedBlockCRC = (s->storedBlockCRC << 8) | ((UInt32)uc);
|
|
|
|
|
|
GET_BITS(BZ_X_RANDBIT, s->blockRandomised, 1);
|
|
*/
|
|
|
|
s->origPtr = 0;
|
|
GET_UCHAR(BZ_X_ORIGPTR_1, uc);
|
|
s->origPtr = (s->origPtr << 8) | ((Int32)uc);
|
|
GET_UCHAR(BZ_X_ORIGPTR_2, uc);
|
|
s->origPtr = (s->origPtr << 8) | ((Int32)uc);
|
|
GET_UCHAR(BZ_X_ORIGPTR_3, uc);
|
|
s->origPtr = (s->origPtr << 8) | ((Int32)uc);
|
|
|
|
if (s->origPtr < 0)
|
|
RETURN(BZ_DATA_ERROR);
|
|
if (s->origPtr > 10 + 100000*s->blockSize100k)
|
|
RETURN(BZ_DATA_ERROR);
|
|
|
|
/*--- Receive the mapping table ---*/
|
|
for (i = 0; i < 16; i++) {
|
|
GET_BIT(BZ_X_MAPPING_1, uc);
|
|
if (uc == 1)
|
|
s->inUse16[i] = True; else
|
|
s->inUse16[i] = False;
|
|
}
|
|
|
|
for (i = 0; i < 256; i++) s->inUse[i] = False;
|
|
|
|
for (i = 0; i < 16; i++)
|
|
if (s->inUse16[i])
|
|
for (j = 0; j < 16; j++) {
|
|
GET_BIT(BZ_X_MAPPING_2, uc);
|
|
if (uc == 1) s->inUse[i * 16 + j] = True;
|
|
}
|
|
makeMaps_d ( s );
|
|
if (s->nInUse == 0) RETURN(BZ_DATA_ERROR);
|
|
alphaSize = s->nInUse+2;
|
|
|
|
/*--- Now the selectors ---*/
|
|
GET_BITS(BZ_X_SELECTOR_1, nGroups, 3);
|
|
if (nGroups < 2 || nGroups > 6) RETURN(BZ_DATA_ERROR);
|
|
GET_BITS(BZ_X_SELECTOR_2, nSelectors, 15);
|
|
if (nSelectors < 1 || nSelectors > BZ_MAX_SELECTORS) RETURN(BZ_DATA_ERROR);
|
|
for (i = 0; i < nSelectors; i++) {
|
|
j = 0;
|
|
while (True) {
|
|
GET_BIT(BZ_X_SELECTOR_3, uc);
|
|
if (uc == 0) break;
|
|
j++;
|
|
if (j >= nGroups) RETURN(BZ_DATA_ERROR);
|
|
}
|
|
s->selectorMtf[i] = j;
|
|
}
|
|
|
|
/*--- Undo the MTF values for the selectors. ---*/
|
|
{
|
|
UChar pos[BZ_N_GROUPS], tmp, v;
|
|
for (v = 0; v < nGroups; v++) pos[v] = v;
|
|
|
|
for (i = 0; i < nSelectors; i++) {
|
|
v = s->selectorMtf[i];
|
|
tmp = pos[v];
|
|
while (v > 0) { pos[v] = pos[v-1]; v--; }
|
|
pos[0] = tmp;
|
|
s->selector[i] = tmp;
|
|
}
|
|
}
|
|
|
|
/*--- Now the coding tables ---*/
|
|
for (t = 0; t < nGroups; t++) {
|
|
GET_BITS(BZ_X_CODING_1, curr, 5);
|
|
for (i = 0; i < alphaSize; i++) {
|
|
while (True) {
|
|
if (curr < 1 || curr > 20) RETURN(BZ_DATA_ERROR);
|
|
GET_BIT(BZ_X_CODING_2, uc);
|
|
if (uc == 0) break;
|
|
GET_BIT(BZ_X_CODING_3, uc);
|
|
if (uc == 0) curr++; else curr--;
|
|
}
|
|
s->len[t][i] = curr;
|
|
}
|
|
}
|
|
|
|
/*--- Create the Huffman decoding tables ---*/
|
|
for (t = 0; t < nGroups; t++) {
|
|
minLen = 32;
|
|
maxLen = 0;
|
|
for (i = 0; i < alphaSize; i++) {
|
|
if (s->len[t][i] > maxLen) maxLen = s->len[t][i];
|
|
if (s->len[t][i] < minLen) minLen = s->len[t][i];
|
|
}
|
|
CreateDecodeTables (
|
|
&(s->limit[t][0]),
|
|
&(s->base[t][0]),
|
|
&(s->perm[t][0]),
|
|
&(s->len[t][0]),
|
|
minLen, maxLen, alphaSize
|
|
);
|
|
s->minLens[t] = minLen;
|
|
}
|
|
|
|
/*--- Now the MTF values ---*/
|
|
|
|
EOB = s->nInUse+1;
|
|
nblockMAX = 100000 * s->blockSize100k;
|
|
groupNo = -1;
|
|
groupPos = 0;
|
|
|
|
for (i = 0; i <= 255; i++) s->unzftab[i] = 0;
|
|
|
|
/*-- MTF init --*/
|
|
{
|
|
Int32 ii, jj, kk;
|
|
kk = MTFA_SIZE-1;
|
|
for (ii = 256 / MTFL_SIZE - 1; ii >= 0; ii--) {
|
|
for (jj = MTFL_SIZE-1; jj >= 0; jj--) {
|
|
s->mtfa[kk] = (UChar)(ii * MTFL_SIZE + jj);
|
|
kk--;
|
|
}
|
|
s->mtfbase[ii] = kk + 1;
|
|
}
|
|
}
|
|
/*-- end MTF init --*/
|
|
|
|
nblock = 0;
|
|
GET_MTF_VAL(BZ_X_MTF_1, BZ_X_MTF_2, nextSym);
|
|
|
|
while (True) {
|
|
|
|
if (nextSym == EOB) break;
|
|
|
|
if (nextSym == BZ_RUNA || nextSym == BZ_RUNB) {
|
|
|
|
es = -1;
|
|
N = 1;
|
|
do {
|
|
/* Check that N doesn't get too big, so that es doesn't
|
|
go negative. The maximum value that can be
|
|
RUNA/RUNB encoded is equal to the block size (post
|
|
the initial RLE), viz, 900k, so bounding N at 2
|
|
million should guard against overflow without
|
|
rejecting any legitimate inputs. */
|
|
if (N >= 2*1024*1024) RETURN(BZ_DATA_ERROR);
|
|
if (nextSym == BZ_RUNA) es = es + (0+1) * N; else
|
|
if (nextSym == BZ_RUNB) es = es + (1+1) * N;
|
|
N = N * 2;
|
|
GET_MTF_VAL(BZ_X_MTF_3, BZ_X_MTF_4, nextSym);
|
|
}
|
|
while (nextSym == BZ_RUNA || nextSym == BZ_RUNB);
|
|
|
|
es++;
|
|
uc = s->seqToUnseq[ s->mtfa[s->mtfbase[0]] ];
|
|
s->unzftab[uc] += es;
|
|
|
|
if (s->smallDecompress)
|
|
while (es > 0) {
|
|
if (nblock >= nblockMAX) RETURN(BZ_DATA_ERROR);
|
|
s->ll16[nblock] = (UInt16)uc;
|
|
nblock++;
|
|
es--;
|
|
}
|
|
else
|
|
while (es > 0) {
|
|
if (nblock >= nblockMAX) RETURN(BZ_DATA_ERROR);
|
|
s->tt[nblock] = (UInt32)uc;
|
|
nblock++;
|
|
es--;
|
|
};
|
|
|
|
continue;
|
|
|
|
} else {
|
|
|
|
if (nblock >= nblockMAX) RETURN(BZ_DATA_ERROR);
|
|
|
|
/*-- uc = MTF ( nextSym-1 ) --*/
|
|
{
|
|
Int32 ii, jj, kk, pp, lno, off;
|
|
UInt32 nn;
|
|
nn = (UInt32)(nextSym - 1);
|
|
|
|
if (nn < MTFL_SIZE) {
|
|
/* avoid general-case expense */
|
|
pp = s->mtfbase[0];
|
|
uc = s->mtfa[pp+nn];
|
|
while (nn > 3) {
|
|
Int32 z = pp+nn;
|
|
s->mtfa[(z) ] = s->mtfa[(z)-1];
|
|
s->mtfa[(z)-1] = s->mtfa[(z)-2];
|
|
s->mtfa[(z)-2] = s->mtfa[(z)-3];
|
|
s->mtfa[(z)-3] = s->mtfa[(z)-4];
|
|
nn -= 4;
|
|
}
|
|
while (nn > 0) {
|
|
s->mtfa[(pp+nn)] = s->mtfa[(pp+nn)-1]; nn--;
|
|
};
|
|
s->mtfa[pp] = uc;
|
|
} else {
|
|
/* general case */
|
|
lno = nn / MTFL_SIZE;
|
|
off = nn % MTFL_SIZE;
|
|
pp = s->mtfbase[lno] + off;
|
|
uc = s->mtfa[pp];
|
|
while (pp > s->mtfbase[lno]) {
|
|
s->mtfa[pp] = s->mtfa[pp-1]; pp--;
|
|
};
|
|
s->mtfbase[lno]++;
|
|
while (lno > 0) {
|
|
s->mtfbase[lno]--;
|
|
s->mtfa[s->mtfbase[lno]]
|
|
= s->mtfa[s->mtfbase[lno-1] + MTFL_SIZE - 1];
|
|
lno--;
|
|
}
|
|
s->mtfbase[0]--;
|
|
s->mtfa[s->mtfbase[0]] = uc;
|
|
if (s->mtfbase[0] == 0) {
|
|
kk = MTFA_SIZE-1;
|
|
for (ii = 256 / MTFL_SIZE-1; ii >= 0; ii--) {
|
|
for (jj = MTFL_SIZE-1; jj >= 0; jj--) {
|
|
s->mtfa[kk] = s->mtfa[s->mtfbase[ii] + jj];
|
|
kk--;
|
|
}
|
|
s->mtfbase[ii] = kk + 1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
/*-- end uc = MTF ( nextSym-1 ) --*/
|
|
|
|
s->unzftab[s->seqToUnseq[uc]]++;
|
|
if (s->smallDecompress)
|
|
s->ll16[nblock] = (UInt16)(s->seqToUnseq[uc]); else
|
|
s->tt[nblock] = (UInt32)(s->seqToUnseq[uc]);
|
|
nblock++;
|
|
|
|
GET_MTF_VAL(BZ_X_MTF_5, BZ_X_MTF_6, nextSym);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
/* Now we know what nblock is, we can do a better sanity
|
|
check on s->origPtr.
|
|
*/
|
|
if (s->origPtr < 0 || s->origPtr >= nblock)
|
|
RETURN(BZ_DATA_ERROR);
|
|
|
|
/*-- Set up cftab to facilitate generation of T^(-1) --*/
|
|
/* Check: unzftab entries in range. */
|
|
for (i = 0; i <= 255; i++) {
|
|
if (s->unzftab[i] < 0 || s->unzftab[i] > nblock)
|
|
RETURN(BZ_DATA_ERROR);
|
|
}
|
|
/* Actually generate cftab. */
|
|
s->cftab[0] = 0;
|
|
for (i = 1; i <= 256; i++) s->cftab[i] = s->unzftab[i-1];
|
|
for (i = 1; i <= 256; i++) s->cftab[i] += s->cftab[i-1];
|
|
/* Check: cftab entries in range. */
|
|
for (i = 0; i <= 256; i++) {
|
|
if (s->cftab[i] < 0 || s->cftab[i] > nblock) {
|
|
RETURN(BZ_DATA_ERROR);
|
|
}
|
|
}
|
|
/* Check: cftab entries non-descending. */
|
|
for (i = 1; i <= 256; i++) {
|
|
if (s->cftab[i-1] > s->cftab[i]) {
|
|
RETURN(BZ_DATA_ERROR);
|
|
}
|
|
}
|
|
|
|
s->state_out_len = 0;
|
|
s->state_out_ch = 0;
|
|
/* BZ_INITIALISE_CRC ( s->calculatedBlockCRC ); */
|
|
s->state = BZ_X_OUTPUT;
|
|
if (s->verbosity >= 2) VPrintf0 ( "rt+rld" );
|
|
|
|
if (s->smallDecompress) {
|
|
|
|
/*-- Make a copy of cftab, used in generation of T --*/
|
|
for (i = 0; i <= 256; i++) s->cftabCopy[i] = s->cftab[i];
|
|
|
|
/*-- compute the T vector --*/
|
|
for (i = 0; i < nblock; i++) {
|
|
uc = (UChar)(s->ll16[i]);
|
|
SET_LL(i, s->cftabCopy[uc]);
|
|
s->cftabCopy[uc]++;
|
|
}
|
|
|
|
/*-- Compute T^(-1) by pointer reversal on T --*/
|
|
i = s->origPtr;
|
|
j = GET_LL(i);
|
|
do {
|
|
Int32 tmp = GET_LL(j);
|
|
SET_LL(j, i);
|
|
i = j;
|
|
j = tmp;
|
|
}
|
|
while (i != s->origPtr);
|
|
|
|
s->tPos = s->origPtr;
|
|
s->nblock_used = 0;
|
|
/* aCaB
|
|
if (s->blockRandomised) {
|
|
BZ_RAND_INIT_MASK;
|
|
BZ_GET_SMALL(s->k0); s->nblock_used++;
|
|
BZ_RAND_UPD_MASK; s->k0 ^= BZ_RAND_MASK;
|
|
} else */{
|
|
BZ_GET_SMALL(s->k0); s->nblock_used++;
|
|
}
|
|
|
|
} else {
|
|
|
|
/*-- compute the T^(-1) vector --*/
|
|
for (i = 0; i < nblock; i++) {
|
|
uc = (UChar)(s->tt[i] & 0xff);
|
|
s->tt[s->cftab[uc]] |= (i << 8);
|
|
s->cftab[uc]++;
|
|
}
|
|
|
|
s->tPos = s->tt[s->origPtr] >> 8;
|
|
s->nblock_used = 0;
|
|
/* aCaB
|
|
if (s->blockRandomised) {
|
|
BZ_RAND_INIT_MASK;
|
|
BZ_GET_FAST(s->k0); s->nblock_used++;
|
|
BZ_RAND_UPD_MASK; s->k0 ^= BZ_RAND_MASK;
|
|
} else */{
|
|
BZ_GET_FAST(s->k0); s->nblock_used++;
|
|
}
|
|
|
|
}
|
|
|
|
RETURN(BZ_OK);
|
|
|
|
|
|
|
|
endhdr_2:
|
|
/* aCaB
|
|
GET_UCHAR(BZ_X_ENDHDR_2, uc);
|
|
if (uc != 0x72) RETURN(BZ_DATA_ERROR);
|
|
GET_UCHAR(BZ_X_ENDHDR_3, uc);
|
|
if (uc != 0x45) RETURN(BZ_DATA_ERROR);
|
|
GET_UCHAR(BZ_X_ENDHDR_4, uc);
|
|
if (uc != 0x38) RETURN(BZ_DATA_ERROR);
|
|
GET_UCHAR(BZ_X_ENDHDR_5, uc);
|
|
if (uc != 0x50) RETURN(BZ_DATA_ERROR);
|
|
GET_UCHAR(BZ_X_ENDHDR_6, uc);
|
|
if (uc != 0x90) RETURN(BZ_DATA_ERROR);
|
|
|
|
s->storedCombinedCRC = 0;
|
|
GET_UCHAR(BZ_X_CCRC_1, uc);
|
|
s->storedCombinedCRC = (s->storedCombinedCRC << 8) | ((UInt32)uc);
|
|
GET_UCHAR(BZ_X_CCRC_2, uc);
|
|
s->storedCombinedCRC = (s->storedCombinedCRC << 8) | ((UInt32)uc);
|
|
GET_UCHAR(BZ_X_CCRC_3, uc);
|
|
s->storedCombinedCRC = (s->storedCombinedCRC << 8) | ((UInt32)uc);
|
|
GET_UCHAR(BZ_X_CCRC_4, uc);
|
|
s->storedCombinedCRC = (s->storedCombinedCRC << 8) | ((UInt32)uc);
|
|
*/
|
|
s->state = BZ_X_IDLE;
|
|
RETURN(BZ_STREAM_END);
|
|
|
|
default: /* aCaB AssertH ( False, 4001 ); */
|
|
RETURN(BZ_DATA_ERROR);
|
|
}
|
|
|
|
/* aCaB AssertH ( False, 4002 ); */
|
|
RETURN(BZ_DATA_ERROR);
|
|
|
|
save_state_and_return:
|
|
|
|
s->save_i = i;
|
|
s->save_j = j;
|
|
s->save_t = t;
|
|
s->save_alphaSize = alphaSize;
|
|
s->save_nGroups = nGroups;
|
|
s->save_nSelectors = nSelectors;
|
|
s->save_EOB = EOB;
|
|
s->save_groupNo = groupNo;
|
|
s->save_groupPos = groupPos;
|
|
s->save_nextSym = nextSym;
|
|
s->save_nblockMAX = nblockMAX;
|
|
s->save_nblock = nblock;
|
|
s->save_es = es;
|
|
s->save_N = N;
|
|
s->save_curr = curr;
|
|
s->save_zt = zt;
|
|
s->save_zn = zn;
|
|
s->save_zvec = zvec;
|
|
s->save_zj = zj;
|
|
s->save_gSel = gSel;
|
|
s->save_gMinlen = gMinlen;
|
|
s->save_gLimit = gLimit;
|
|
s->save_gBase = gBase;
|
|
s->save_gPerm = gPerm;
|
|
|
|
return retVal;
|
|
}
|
|
|
|
|
|
/*---------------------------------------------------*/
|
|
static
|
|
int bz_config_ok ( void )
|
|
{
|
|
if (sizeof(int) != 4) return 0;
|
|
if (sizeof(short) != 2) return 0;
|
|
if (sizeof(char) != 1) return 0;
|
|
return 1;
|
|
}
|
|
|
|
|
|
/*---------------------------------------------------*/
|
|
static
|
|
void* default_bzalloc ( void* opaque, Int32 items, Int32 size )
|
|
{
|
|
void* v = cli_malloc ( items * size );
|
|
UNUSEDPARAM(opaque);
|
|
return v;
|
|
}
|
|
|
|
static
|
|
void default_bzfree ( void* opaque, void* addr )
|
|
{
|
|
UNUSEDPARAM(opaque);
|
|
if (addr != NULL) free ( addr );
|
|
}
|
|
|
|
/*---------------------------------------------------*/
|
|
int BZ_API(nsis_BZ2_bzDecompressInit)
|
|
( nsis_bzstream* strm,
|
|
int verbosity,
|
|
int small )
|
|
{
|
|
DState* s;
|
|
|
|
if (!bz_config_ok()) return BZ_CONFIG_ERROR;
|
|
|
|
if (strm == NULL) return BZ_PARAM_ERROR;
|
|
if (small != 0 && small != 1) return BZ_PARAM_ERROR;
|
|
if (verbosity < 0 || verbosity > 4) return BZ_PARAM_ERROR;
|
|
|
|
if (strm->bzalloc == NULL) strm->bzalloc = default_bzalloc;
|
|
if (strm->bzfree == NULL) strm->bzfree = default_bzfree;
|
|
|
|
s = BZALLOC( sizeof(DState) );
|
|
if (s == NULL) return BZ_MEM_ERROR;
|
|
s->strm = strm;
|
|
strm->state = s;
|
|
s->state = BZ_X_MAGIC_1;
|
|
s->bsLive = 0;
|
|
s->bsBuff = 0;
|
|
s->calculatedCombinedCRC = 0;
|
|
strm->total_in_lo32 = 0;
|
|
strm->total_in_hi32 = 0;
|
|
strm->total_out_lo32 = 0;
|
|
strm->total_out_hi32 = 0;
|
|
s->smallDecompress = (Bool)small;
|
|
s->ll4 = NULL;
|
|
s->ll16 = NULL;
|
|
s->tt = NULL;
|
|
s->currBlockNo = 0;
|
|
s->verbosity = verbosity;
|
|
|
|
return BZ_OK;
|
|
}
|
|
|
|
/*---------------------------------------------------*/
|
|
int BZ_API(nsis_BZ2_bzDecompress) ( nsis_bzstream *strm )
|
|
{
|
|
Bool corrupt;
|
|
DState* s;
|
|
if (strm == NULL) return BZ_PARAM_ERROR;
|
|
s = strm->state;
|
|
if (s == NULL) return BZ_PARAM_ERROR;
|
|
if (s->strm != strm) return BZ_PARAM_ERROR;
|
|
|
|
while (True) {
|
|
if (s->state == BZ_X_IDLE) return BZ_SEQUENCE_ERROR;
|
|
if (s->state == BZ_X_OUTPUT) {
|
|
if (s->smallDecompress)
|
|
corrupt = unRLE_obuf_to_output_SMALL ( s ); else
|
|
corrupt = unRLE_obuf_to_output_FAST ( s );
|
|
if (corrupt) return BZ_DATA_ERROR;
|
|
if (s->nblock_used == s->save_nblock+1 && s->state_out_len == 0) {
|
|
/* BZ_FINALISE_CRC ( s->calculatedBlockCRC );
|
|
if (s->verbosity >= 3)
|
|
VPrintf2 ( " {0x%08x, 0x%08x}", s->storedBlockCRC,
|
|
s->calculatedBlockCRC );
|
|
if (s->verbosity >= 2) VPrintf0 ( "]" );
|
|
if (s->calculatedBlockCRC != s->storedBlockCRC)
|
|
return BZ_DATA_ERROR;
|
|
s->calculatedCombinedCRC
|
|
= (s->calculatedCombinedCRC << 1) |
|
|
(s->calculatedCombinedCRC >> 31);
|
|
s->calculatedCombinedCRC ^= s->calculatedBlockCRC;
|
|
*/
|
|
s->state = BZ_X_BLKHDR_1;
|
|
} else {
|
|
return BZ_OK;
|
|
}
|
|
}
|
|
if (s->state >= BZ_X_MAGIC_1) {
|
|
Int32 r = BZ2_decompress ( s );
|
|
if (r == BZ_STREAM_END) {
|
|
/* aCaB
|
|
if (s->verbosity >= 3)
|
|
VPrintf2 ( "\n combined CRCs: stored = 0x%08x, computed = 0x%08x",
|
|
s->storedCombinedCRC, s->calculatedCombinedCRC );
|
|
if (s->calculatedCombinedCRC != s->storedCombinedCRC)
|
|
return BZ_DATA_ERROR;
|
|
*/
|
|
return r;
|
|
}
|
|
if (s->state != BZ_X_OUTPUT) return r;
|
|
}
|
|
}
|
|
|
|
/* AssertH ( 0, 6001 ); */
|
|
return BZ_DATA_ERROR;
|
|
/* return 0; */ /*NOTREACHED*/
|
|
}
|
|
|
|
|
|
/*---------------------------------------------------*/
|
|
int BZ_API(nsis_BZ2_bzDecompressEnd) ( nsis_bzstream *strm )
|
|
{
|
|
DState* s;
|
|
if (strm == NULL) return BZ_PARAM_ERROR;
|
|
s = strm->state;
|
|
if (s == NULL) return BZ_PARAM_ERROR;
|
|
if (s->strm != strm) return BZ_PARAM_ERROR;
|
|
|
|
if (s->tt != NULL) BZFREE(s->tt);
|
|
if (s->ll16 != NULL) BZFREE(s->ll16);
|
|
if (s->ll4 != NULL) BZFREE(s->ll4);
|
|
|
|
BZFREE(strm->state);
|
|
strm->state = NULL;
|
|
|
|
return BZ_OK;
|
|
}
|
|
|
|
/*-------------------------------------------------------------*/
|
|
/*--- end bzlib.c ---*/
|
|
/*-------------------------------------------------------------*/
|