675 lines
		
	
	
		
			19 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
			
		
		
	
	
			675 lines
		
	
	
		
			19 KiB
		
	
	
	
		
			C
		
	
	
	
	
	
#include <config.h>
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#include <common.h>
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#include <watchdog.h>
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/*-------------------------------------------------------------*/
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/*--- Decompression machinery                               ---*/
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/*---                                          decompress.c ---*/
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/*-------------------------------------------------------------*/
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/*--
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  This file is a part of bzip2 and/or libbzip2, a program and
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  library for lossless, block-sorting data compression.
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  Copyright (C) 1996-2002 Julian R Seward.  All rights reserved.
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  Redistribution and use in source and binary forms, with or without
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  modification, are permitted provided that the following conditions
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  are met:
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  1. Redistributions of source code must retain the above copyright
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     notice, this list of conditions and the following disclaimer.
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  2. The origin of this software must not be misrepresented; you must
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     not claim that you wrote the original software.  If you use this
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     software in a product, an acknowledgment in the product
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     documentation would be appreciated but is not required.
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  3. Altered source versions must be plainly marked as such, and must
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     not be misrepresented as being the original software.
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  4. The name of the author may not be used to endorse or promote
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     products derived from this software without specific prior written
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     permission.
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  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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  OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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  ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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  GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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  Julian Seward, Cambridge, UK.
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  jseward@acm.org
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  bzip2/libbzip2 version 1.0 of 21 March 2000
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  This program is based on (at least) the work of:
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     Mike Burrows
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     David Wheeler
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     Peter Fenwick
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     Alistair Moffat
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     Radford Neal
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     Ian H. Witten
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     Robert Sedgewick
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     Jon L. Bentley
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  For more information on these sources, see the manual.
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--*/
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#include "bzlib_private.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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	      (*((UChar*)(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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Int32 BZ2_decompress ( DState* s )
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{
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   UChar      uc;
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   Int32      retVal;
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   Int32      minLen, maxLen;
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   bz_stream* strm = s->strm;
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   /* stuff that needs to be saved/restored */
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   Int32  i;
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   Int32  j;
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   Int32  t;
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   Int32  alphaSize;
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   Int32  nGroups;
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   Int32  nSelectors;
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   Int32  EOB;
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   Int32  groupNo;
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   Int32  groupPos;
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   Int32  nextSym;
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   Int32  nblockMAX;
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   Int32  nblock;
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   Int32  es;
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   Int32  N;
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   Int32  curr;
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   Int32  zt;
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   Int32  zn;
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   Int32  zvec;
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   Int32  zj;
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   Int32  gSel;
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   Int32  gMinlen;
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   Int32* gLimit;
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   Int32* gBase;
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   Int32* gPerm;
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   if (s->state == BZ_X_MAGIC_1) {
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      /*initialise the save area*/
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      s->save_i           = 0;
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      s->save_j           = 0;
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      s->save_t           = 0;
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      s->save_alphaSize   = 0;
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      s->save_nGroups     = 0;
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      s->save_nSelectors  = 0;
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      s->save_EOB         = 0;
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      s->save_groupNo     = 0;
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      s->save_groupPos    = 0;
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      s->save_nextSym     = 0;
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      s->save_nblockMAX   = 0;
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      s->save_nblock      = 0;
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      s->save_es          = 0;
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      s->save_N           = 0;
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      s->save_curr        = 0;
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      s->save_zt          = 0;
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      s->save_zn          = 0;
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      s->save_zvec        = 0;
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      s->save_zj          = 0;
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      s->save_gSel        = 0;
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      s->save_gMinlen     = 0;
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      s->save_gLimit      = NULL;
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      s->save_gBase       = NULL;
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      s->save_gPerm       = NULL;
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   }
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   /*restore from the save area*/
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   i           = s->save_i;
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   j           = s->save_j;
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   t           = s->save_t;
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   alphaSize   = s->save_alphaSize;
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   nGroups     = s->save_nGroups;
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   nSelectors  = s->save_nSelectors;
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   EOB         = s->save_EOB;
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   groupNo     = s->save_groupNo;
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   groupPos    = s->save_groupPos;
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   nextSym     = s->save_nextSym;
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   nblockMAX   = s->save_nblockMAX;
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   nblock      = s->save_nblock;
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   es          = s->save_es;
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   N           = s->save_N;
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   curr        = s->save_curr;
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   zt          = s->save_zt;
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   zn          = s->save_zn;
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   zvec        = s->save_zvec;
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   zj          = s->save_zj;
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   gSel        = s->save_gSel;
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   gMinlen     = s->save_gMinlen;
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   gLimit      = s->save_gLimit;
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   gBase       = s->save_gBase;
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   gPerm       = s->save_gPerm;
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   retVal = BZ_OK;
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   switch (s->state) {
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      GET_UCHAR(BZ_X_MAGIC_1, uc);
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      if (uc != BZ_HDR_B) RETURN(BZ_DATA_ERROR_MAGIC);
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      GET_UCHAR(BZ_X_MAGIC_2, uc);
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      if (uc != BZ_HDR_Z) RETURN(BZ_DATA_ERROR_MAGIC);
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      GET_UCHAR(BZ_X_MAGIC_3, uc)
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      if (uc != BZ_HDR_h) RETURN(BZ_DATA_ERROR_MAGIC);
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      GET_BITS(BZ_X_MAGIC_4, s->blockSize100k, 8)
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      if (s->blockSize100k < (BZ_HDR_0 + 1) ||
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	  s->blockSize100k > (BZ_HDR_0 + 9)) RETURN(BZ_DATA_ERROR_MAGIC);
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      s->blockSize100k -= BZ_HDR_0;
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      if (s->smallDecompress) {
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	 s->ll16 = BZALLOC( s->blockSize100k * 100000 * sizeof(UInt16) );
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	 s->ll4  = BZALLOC(
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		      ((1 + s->blockSize100k * 100000) >> 1) * sizeof(UChar)
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		   );
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	 if (s->ll16 == NULL || s->ll4 == NULL) RETURN(BZ_MEM_ERROR);
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      } else {
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	 s->tt  = BZALLOC( s->blockSize100k * 100000 * sizeof(Int32) );
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	 if (s->tt == NULL) RETURN(BZ_MEM_ERROR);
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      }
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      GET_UCHAR(BZ_X_BLKHDR_1, uc);
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      if (uc == 0x17) goto endhdr_2;
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      if (uc != 0x31) RETURN(BZ_DATA_ERROR);
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      GET_UCHAR(BZ_X_BLKHDR_2, uc);
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      if (uc != 0x41) RETURN(BZ_DATA_ERROR);
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      GET_UCHAR(BZ_X_BLKHDR_3, uc);
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      if (uc != 0x59) RETURN(BZ_DATA_ERROR);
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      GET_UCHAR(BZ_X_BLKHDR_4, uc);
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      if (uc != 0x26) RETURN(BZ_DATA_ERROR);
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      GET_UCHAR(BZ_X_BLKHDR_5, uc);
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      if (uc != 0x53) RETURN(BZ_DATA_ERROR);
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      GET_UCHAR(BZ_X_BLKHDR_6, uc);
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      if (uc != 0x59) RETURN(BZ_DATA_ERROR);
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      s->currBlockNo++;
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      if (s->verbosity >= 2)
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	 VPrintf1 ( "\n    [%d: huff+mtf ", s->currBlockNo );
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      s->storedBlockCRC = 0;
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      GET_UCHAR(BZ_X_BCRC_1, uc);
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      s->storedBlockCRC = (s->storedBlockCRC << 8) | ((UInt32)uc);
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      GET_UCHAR(BZ_X_BCRC_2, uc);
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      s->storedBlockCRC = (s->storedBlockCRC << 8) | ((UInt32)uc);
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      GET_UCHAR(BZ_X_BCRC_3, uc);
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      s->storedBlockCRC = (s->storedBlockCRC << 8) | ((UInt32)uc);
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      GET_UCHAR(BZ_X_BCRC_4, uc);
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      s->storedBlockCRC = (s->storedBlockCRC << 8) | ((UInt32)uc);
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      GET_BITS(BZ_X_RANDBIT, s->blockRandomised, 1);
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      s->origPtr = 0;
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      GET_UCHAR(BZ_X_ORIGPTR_1, uc);
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      s->origPtr = (s->origPtr << 8) | ((Int32)uc);
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      GET_UCHAR(BZ_X_ORIGPTR_2, uc);
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      s->origPtr = (s->origPtr << 8) | ((Int32)uc);
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      GET_UCHAR(BZ_X_ORIGPTR_3, uc);
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      s->origPtr = (s->origPtr << 8) | ((Int32)uc);
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      if (s->origPtr < 0)
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	 RETURN(BZ_DATA_ERROR);
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      if (s->origPtr > 10 + 100000*s->blockSize100k)
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	 RETURN(BZ_DATA_ERROR);
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 | 
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      /*--- Receive the mapping table ---*/
 | 
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      for (i = 0; i < 16; i++) {
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	 GET_BIT(BZ_X_MAPPING_1, uc);
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	 if (uc == 1)
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	    s->inUse16[i] = True; else
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	    s->inUse16[i] = False;
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      }
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 | 
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      for (i = 0; i < 256; i++) s->inUse[i] = False;
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 | 
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      for (i = 0; i < 16; i++)
 | 
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	 if (s->inUse16[i])
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	    for (j = 0; j < 16; j++) {
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	       GET_BIT(BZ_X_MAPPING_2, uc);
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	       if (uc == 1) s->inUse[i * 16 + j] = True;
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	    }
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      makeMaps_d ( s );
 | 
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      if (s->nInUse == 0) RETURN(BZ_DATA_ERROR);
 | 
						|
      alphaSize = s->nInUse+2;
 | 
						|
 | 
						|
      /*--- Now the selectors ---*/
 | 
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      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) 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];
 | 
						|
	 }
 | 
						|
	 BZ2_hbCreateDecodeTables (
 | 
						|
	    &(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 defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
 | 
						|
	WATCHDOG_RESET();
 | 
						|
#endif
 | 
						|
	 if (nextSym == EOB) break;
 | 
						|
 | 
						|
	 if (nextSym == BZ_RUNA || nextSym == BZ_RUNB) {
 | 
						|
 | 
						|
	    es = -1;
 | 
						|
	    N = 1;
 | 
						|
	    do {
 | 
						|
	       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--) {
 | 
						|
#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
 | 
						|
			WATCHDOG_RESET();
 | 
						|
#endif
 | 
						|
			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);
 | 
						|
 | 
						|
      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" );
 | 
						|
 | 
						|
      /*-- Set up cftab to facilitate generation of T^(-1) --*/
 | 
						|
      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];
 | 
						|
 | 
						|
      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);
 | 
						|
 | 
						|
#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
 | 
						|
	WATCHDOG_RESET();
 | 
						|
#endif
 | 
						|
	 s->tPos = s->origPtr;
 | 
						|
	 s->nblock_used = 0;
 | 
						|
	 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 {
 | 
						|
 | 
						|
#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
 | 
						|
	WATCHDOG_RESET();
 | 
						|
#endif
 | 
						|
	 /*-- 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;
 | 
						|
	 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:
 | 
						|
 | 
						|
      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: AssertH ( False, 4001 );
 | 
						|
   }
 | 
						|
 | 
						|
   AssertH ( False, 4002 );
 | 
						|
 | 
						|
   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;
 | 
						|
}
 | 
						|
 | 
						|
 | 
						|
/*-------------------------------------------------------------*/
 | 
						|
/*--- end                                      decompress.c ---*/
 | 
						|
/*-------------------------------------------------------------*/
 |