bzlib.c 42.6 KB
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#include <config.h>
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#include <common.h>
#include <watchdog.h>
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/*
 * This file is a modified version of bzlib.c from the bzip2-1.0.2
 * distribution which can be found at http://sources.redhat.com/bzip2/
 */

/*-------------------------------------------------------------*/
/*--- Library top-level functions.                          ---*/
/*---                                               bzlib.c ---*/
/*-------------------------------------------------------------*/

/*--
  This file is a part of bzip2 and/or libbzip2, a program and
  library for lossless, block-sorting data compression.

  Copyright (C) 1996-2002 Julian R Seward.  All rights reserved.

  Redistribution and use in source and binary forms, with or without
  modification, are permitted provided that the following conditions
  are met:

  1. Redistributions of source code must retain the above copyright
     notice, this list of conditions and the following disclaimer.

  2. The origin of this software must not be misrepresented; you must
     not claim that you wrote the original software.  If you use this
     software in a product, an acknowledgment in the product
     documentation would be appreciated but is not required.

  3. Altered source versions must be plainly marked as such, and must
     not be misrepresented as being the original software.

  4. The name of the author may not be used to endorse or promote
     products derived from this software without specific prior written
     permission.

  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
  OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
  GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

  Julian Seward, Cambridge, UK.
  jseward@acm.org
  bzip2/libbzip2 version 1.0 of 21 March 2000

  This program is based on (at least) the work of:
     Mike Burrows
     David Wheeler
     Peter Fenwick
     Alistair Moffat
     Radford Neal
     Ian H. Witten
     Robert Sedgewick
     Jon L. Bentley

  For more information on these sources, see the manual.
--*/

/*--
   CHANGES
   ~~~~~~~
   0.9.0 -- original version.

   0.9.0a/b -- no changes in this file.

   0.9.0c
      * made zero-length BZ_FLUSH work correctly in bzCompress().
      * fixed bzWrite/bzRead to ignore zero-length requests.
      * fixed bzread to correctly handle read requests after EOF.
      * wrong parameter order in call to bzDecompressInit in
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	bzBuffToBuffDecompress.  Fixed.
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--*/

#include "bzlib_private.h"

/*---------------------------------------------------*/
/*--- Compression stuff                           ---*/
/*---------------------------------------------------*/


/*---------------------------------------------------*/
#ifndef BZ_NO_STDIO
void BZ2_bz__AssertH__fail ( int errcode )
{
   fprintf(stderr,
      "\n\nbzip2/libbzip2: internal error number %d.\n"
      "This is a bug in bzip2/libbzip2, %s.\n"
      "Please report it to me at: jseward@acm.org.  If this happened\n"
      "when you were using some program which uses libbzip2 as a\n"
      "component, you should also report this bug to the author(s)\n"
      "of that program.  Please make an effort to report this bug;\n"
      "timely and accurate bug reports eventually lead to higher\n"
      "quality software.  Thanks.  Julian Seward, 30 December 2001.\n\n",
      errcode,
      BZ2_bzlibVersion()
   );

   if (errcode == 1007) {
   fprintf(stderr,
      "\n*** A special note about internal error number 1007 ***\n"
      "\n"
      "Experience suggests that a common cause of i.e. 1007\n"
      "is unreliable memory or other hardware.  The 1007 assertion\n"
      "just happens to cross-check the results of huge numbers of\n"
      "memory reads/writes, and so acts (unintendedly) as a stress\n"
      "test of your memory system.\n"
      "\n"
      "I suggest the following: try compressing the file again,\n"
      "possibly monitoring progress in detail with the -vv flag.\n"
      "\n"
      "* If the error cannot be reproduced, and/or happens at different\n"
      "  points in compression, you may have a flaky memory system.\n"
      "  Try a memory-test program.  I have used Memtest86\n"
      "  (www.memtest86.com).  At the time of writing it is free (GPLd).\n"
      "  Memtest86 tests memory much more thorougly than your BIOSs\n"
      "  power-on test, and may find failures that the BIOS doesn't.\n"
      "\n"
      "* If the error can be repeatably reproduced, this is a bug in\n"
      "  bzip2, and I would very much like to hear about it.  Please\n"
      "  let me know, and, ideally, save a copy of the file causing the\n"
      "  problem -- without which I will be unable to investigate it.\n"
      "\n"
   );
   }

   exit(3);
}
#endif


/*---------------------------------------------------*/
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 = malloc ( items * size );
   return v;
}

static
void default_bzfree ( void* opaque, void* addr )
{
   if (addr != NULL) free ( addr );
}

#ifndef BZ_NO_COMPRESS
/*---------------------------------------------------*/
static
void prepare_new_block ( EState* s )
{
   Int32 i;
   s->nblock = 0;
   s->numZ = 0;
   s->state_out_pos = 0;
   BZ_INITIALISE_CRC ( s->blockCRC );
   for (i = 0; i < 256; i++) s->inUse[i] = False;
   s->blockNo++;
}


/*---------------------------------------------------*/
static
void init_RL ( EState* s )
{
   s->state_in_ch  = 256;
   s->state_in_len = 0;
}


static
Bool isempty_RL ( EState* s )
{
   if (s->state_in_ch < 256 && s->state_in_len > 0)
      return False; else
      return True;
}

/*---------------------------------------------------*/
int BZ_API(BZ2_bzCompressInit)
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		    ( bz_stream* strm,
		     int        blockSize100k,
		     int        verbosity,
		     int        workFactor )
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{
   Int32   n;
   EState* s;

   if (!bz_config_ok()) return BZ_CONFIG_ERROR;

   if (strm == NULL ||
       blockSize100k < 1 || blockSize100k > 9 ||
       workFactor < 0 || workFactor > 250)
     return BZ_PARAM_ERROR;

   if (workFactor == 0) workFactor = 30;
   if (strm->bzalloc == NULL) strm->bzalloc = default_bzalloc;
   if (strm->bzfree == NULL) strm->bzfree = default_bzfree;

   s = BZALLOC( sizeof(EState) );
   if (s == NULL) return BZ_MEM_ERROR;
   s->strm = strm;

   s->arr1 = NULL;
   s->arr2 = NULL;
   s->ftab = NULL;

   n       = 100000 * blockSize100k;
   s->arr1 = BZALLOC( n                  * sizeof(UInt32) );
   s->arr2 = BZALLOC( (n+BZ_N_OVERSHOOT) * sizeof(UInt32) );
   s->ftab = BZALLOC( 65537              * sizeof(UInt32) );

   if (s->arr1 == NULL || s->arr2 == NULL || s->ftab == NULL) {
      if (s->arr1 != NULL) BZFREE(s->arr1);
      if (s->arr2 != NULL) BZFREE(s->arr2);
      if (s->ftab != NULL) BZFREE(s->ftab);
      if (s       != NULL) BZFREE(s);
      return BZ_MEM_ERROR;
   }

   s->blockNo           = 0;
   s->state             = BZ_S_INPUT;
   s->mode              = BZ_M_RUNNING;
   s->combinedCRC       = 0;
   s->blockSize100k     = blockSize100k;
   s->nblockMAX         = 100000 * blockSize100k - 19;
   s->verbosity         = verbosity;
   s->workFactor        = workFactor;

   s->block             = (UChar*)s->arr2;
   s->mtfv              = (UInt16*)s->arr1;
   s->zbits             = NULL;
   s->ptr               = (UInt32*)s->arr1;

   strm->state          = s;
   strm->total_in_lo32  = 0;
   strm->total_in_hi32  = 0;
   strm->total_out_lo32 = 0;
   strm->total_out_hi32 = 0;
   init_RL ( s );
   prepare_new_block ( s );
   return BZ_OK;
}


/*---------------------------------------------------*/
static
void add_pair_to_block ( EState* s )
{
   Int32 i;
   UChar ch = (UChar)(s->state_in_ch);
   for (i = 0; i < s->state_in_len; i++) {
      BZ_UPDATE_CRC( s->blockCRC, ch );
   }
   s->inUse[s->state_in_ch] = True;
   switch (s->state_in_len) {
      case 1:
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	 s->block[s->nblock] = (UChar)ch; s->nblock++;
	 break;
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      case 2:
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	 s->block[s->nblock] = (UChar)ch; s->nblock++;
	 s->block[s->nblock] = (UChar)ch; s->nblock++;
	 break;
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      case 3:
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	 s->block[s->nblock] = (UChar)ch; s->nblock++;
	 s->block[s->nblock] = (UChar)ch; s->nblock++;
	 s->block[s->nblock] = (UChar)ch; s->nblock++;
	 break;
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      default:
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	 s->inUse[s->state_in_len-4] = True;
	 s->block[s->nblock] = (UChar)ch; s->nblock++;
	 s->block[s->nblock] = (UChar)ch; s->nblock++;
	 s->block[s->nblock] = (UChar)ch; s->nblock++;
	 s->block[s->nblock] = (UChar)ch; s->nblock++;
	 s->block[s->nblock] = ((UChar)(s->state_in_len-4));
	 s->nblock++;
	 break;
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   }
}


/*---------------------------------------------------*/
static
void flush_RL ( EState* s )
{
   if (s->state_in_ch < 256) add_pair_to_block ( s );
   init_RL ( s );
}


/*---------------------------------------------------*/
#define ADD_CHAR_TO_BLOCK(zs,zchh0)               \
{                                                 \
   UInt32 zchh = (UInt32)(zchh0);                 \
   /*-- fast track the common case --*/           \
   if (zchh != zs->state_in_ch &&                 \
       zs->state_in_len == 1) {                   \
      UChar ch = (UChar)(zs->state_in_ch);        \
      BZ_UPDATE_CRC( zs->blockCRC, ch );          \
      zs->inUse[zs->state_in_ch] = True;          \
      zs->block[zs->nblock] = (UChar)ch;          \
      zs->nblock++;                               \
      zs->state_in_ch = zchh;                     \
   }                                              \
   else                                           \
   /*-- general, uncommon cases --*/              \
   if (zchh != zs->state_in_ch ||                 \
      zs->state_in_len == 255) {                  \
      if (zs->state_in_ch < 256)                  \
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	 add_pair_to_block ( zs );                \
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      zs->state_in_ch = zchh;                     \
      zs->state_in_len = 1;                       \
   } else {                                       \
      zs->state_in_len++;                         \
   }                                              \
}


/*---------------------------------------------------*/
static
Bool copy_input_until_stop ( EState* s )
{
   Bool progress_in = False;

   if (s->mode == BZ_M_RUNNING) {

      /*-- fast track the common case --*/
      while (True) {
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	 /*-- block full? --*/
	 if (s->nblock >= s->nblockMAX) break;
	 /*-- no input? --*/
	 if (s->strm->avail_in == 0) break;
	 progress_in = True;
	 ADD_CHAR_TO_BLOCK ( s, (UInt32)(*((UChar*)(s->strm->next_in))) );
	 s->strm->next_in++;
	 s->strm->avail_in--;
	 s->strm->total_in_lo32++;
	 if (s->strm->total_in_lo32 == 0) s->strm->total_in_hi32++;
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      }

   } else {

      /*-- general, uncommon case --*/
      while (True) {
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	 /*-- block full? --*/
	 if (s->nblock >= s->nblockMAX) break;
	 /*-- no input? --*/
	 if (s->strm->avail_in == 0) break;
	 /*-- flush/finish end? --*/
	 if (s->avail_in_expect == 0) break;
	 progress_in = True;
	 ADD_CHAR_TO_BLOCK ( s, (UInt32)(*((UChar*)(s->strm->next_in))) );
	 s->strm->next_in++;
	 s->strm->avail_in--;
	 s->strm->total_in_lo32++;
	 if (s->strm->total_in_lo32 == 0) s->strm->total_in_hi32++;
	 s->avail_in_expect--;
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      }
   }
   return progress_in;
}


/*---------------------------------------------------*/
static
Bool copy_output_until_stop ( EState* s )
{
   Bool progress_out = False;

   while (True) {

      /*-- no output space? --*/
      if (s->strm->avail_out == 0) break;

      /*-- block done? --*/
      if (s->state_out_pos >= s->numZ) break;

      progress_out = True;
      *(s->strm->next_out) = s->zbits[s->state_out_pos];
      s->state_out_pos++;
      s->strm->avail_out--;
      s->strm->next_out++;
      s->strm->total_out_lo32++;
      if (s->strm->total_out_lo32 == 0) s->strm->total_out_hi32++;
   }

   return progress_out;
}


/*---------------------------------------------------*/
static
Bool handle_compress ( bz_stream* strm )
{
   Bool progress_in  = False;
   Bool progress_out = False;
   EState* s = strm->state;

   while (True) {

      if (s->state == BZ_S_OUTPUT) {
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	 progress_out |= copy_output_until_stop ( s );
	 if (s->state_out_pos < s->numZ) break;
	 if (s->mode == BZ_M_FINISHING &&
	     s->avail_in_expect == 0 &&
	     isempty_RL(s)) break;
	 prepare_new_block ( s );
	 s->state = BZ_S_INPUT;
	 if (s->mode == BZ_M_FLUSHING &&
	     s->avail_in_expect == 0 &&
	     isempty_RL(s)) break;
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      }

      if (s->state == BZ_S_INPUT) {
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	 progress_in |= copy_input_until_stop ( s );
	 if (s->mode != BZ_M_RUNNING && s->avail_in_expect == 0) {
	    flush_RL ( s );
	    BZ2_compressBlock ( s, (Bool)(s->mode == BZ_M_FINISHING) );
	    s->state = BZ_S_OUTPUT;
	 }
	 else
	 if (s->nblock >= s->nblockMAX) {
	    BZ2_compressBlock ( s, False );
	    s->state = BZ_S_OUTPUT;
	 }
	 else
	 if (s->strm->avail_in == 0) {
	    break;
	 }
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      }

   }

   return progress_in || progress_out;
}


/*---------------------------------------------------*/
int BZ_API(BZ2_bzCompress) ( bz_stream *strm, int action )
{
   Bool progress;
   EState* 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;

   preswitch:
   switch (s->mode) {

      case BZ_M_IDLE:
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	 return BZ_SEQUENCE_ERROR;
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      case BZ_M_RUNNING:
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	 if (action == BZ_RUN) {
	    progress = handle_compress ( strm );
	    return progress ? BZ_RUN_OK : BZ_PARAM_ERROR;
	 }
	 else
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	 if (action == BZ_FLUSH) {
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	    s->avail_in_expect = strm->avail_in;
	    s->mode = BZ_M_FLUSHING;
	    goto preswitch;
	 }
	 else
	 if (action == BZ_FINISH) {
	    s->avail_in_expect = strm->avail_in;
	    s->mode = BZ_M_FINISHING;
	    goto preswitch;
	 }
	 else
	    return BZ_PARAM_ERROR;
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      case BZ_M_FLUSHING:
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	 if (action != BZ_FLUSH) return BZ_SEQUENCE_ERROR;
	 if (s->avail_in_expect != s->strm->avail_in)
	    return BZ_SEQUENCE_ERROR;
	 progress = handle_compress ( strm );
	 if (s->avail_in_expect > 0 || !isempty_RL(s) ||
	     s->state_out_pos < s->numZ) return BZ_FLUSH_OK;
	 s->mode = BZ_M_RUNNING;
	 return BZ_RUN_OK;
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      case BZ_M_FINISHING:
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	 if (action != BZ_FINISH) return BZ_SEQUENCE_ERROR;
	 if (s->avail_in_expect != s->strm->avail_in)
	    return BZ_SEQUENCE_ERROR;
	 progress = handle_compress ( strm );
	 if (!progress) return BZ_SEQUENCE_ERROR;
	 if (s->avail_in_expect > 0 || !isempty_RL(s) ||
	     s->state_out_pos < s->numZ) return BZ_FINISH_OK;
	 s->mode = BZ_M_IDLE;
	 return BZ_STREAM_END;
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   }
   return BZ_OK; /*--not reached--*/
}


/*---------------------------------------------------*/
int BZ_API(BZ2_bzCompressEnd)  ( bz_stream *strm )
{
   EState* 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->arr1 != NULL) BZFREE(s->arr1);
   if (s->arr2 != NULL) BZFREE(s->arr2);
   if (s->ftab != NULL) BZFREE(s->ftab);
   BZFREE(strm->state);

   strm->state = NULL;

   return BZ_OK;
}
#endif /* BZ_NO_COMPRESS */

/*---------------------------------------------------*/
/*--- Decompression stuff                         ---*/
/*---------------------------------------------------*/

/*---------------------------------------------------*/
int BZ_API(BZ2_bzDecompressInit)
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		     ( bz_stream* strm,
		       int        verbosity,
		       int        small )
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{
   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;
}


/*---------------------------------------------------*/
static
void unRLE_obuf_to_output_FAST ( DState* s )
{
   UChar k1;

   if (s->blockRandomised) {

      while (True) {
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	 /* try to finish existing run */
	 while (True) {
	    if (s->strm->avail_out == 0) return;
	    if (s->state_out_len == 0) break;
	    *( (UChar*)(s->strm->next_out) ) = s->state_out_ch;
	    BZ_UPDATE_CRC ( s->calculatedBlockCRC, s->state_out_ch );
	    s->state_out_len--;
	    s->strm->next_out++;
	    s->strm->avail_out--;
	    s->strm->total_out_lo32++;
	    if (s->strm->total_out_lo32 == 0) s->strm->total_out_hi32++;
	 }

	 /* can a new run be started? */
	 if (s->nblock_used == s->save_nblock+1) return;


	 s->state_out_len = 1;
	 s->state_out_ch = s->k0;
	 BZ_GET_FAST(k1); BZ_RAND_UPD_MASK;
	 k1 ^= BZ_RAND_MASK; s->nblock_used++;
	 if (s->nblock_used == s->save_nblock+1) continue;
	 if (k1 != s->k0) { s->k0 = k1; continue; };

	 s->state_out_len = 2;
	 BZ_GET_FAST(k1); BZ_RAND_UPD_MASK;
	 k1 ^= BZ_RAND_MASK; s->nblock_used++;
	 if (s->nblock_used == s->save_nblock+1) continue;
	 if (k1 != s->k0) { s->k0 = k1; continue; };

	 s->state_out_len = 3;
	 BZ_GET_FAST(k1); BZ_RAND_UPD_MASK;
	 k1 ^= BZ_RAND_MASK; s->nblock_used++;
	 if (s->nblock_used == s->save_nblock+1) continue;
	 if (k1 != s->k0) { s->k0 = k1; continue; };

	 BZ_GET_FAST(k1); BZ_RAND_UPD_MASK;
	 k1 ^= BZ_RAND_MASK; s->nblock_used++;
	 s->state_out_len = ((Int32)k1) + 4;
	 BZ_GET_FAST(s->k0); BZ_RAND_UPD_MASK;
	 s->k0 ^= BZ_RAND_MASK; s->nblock_used++;
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      }

   } else {

      /* restore */
      UInt32        c_calculatedBlockCRC = s->calculatedBlockCRC;
      UChar         c_state_out_ch       = s->state_out_ch;
      Int32         c_state_out_len      = s->state_out_len;
      Int32         c_nblock_used        = s->nblock_used;
      Int32         c_k0                 = s->k0;
      UInt32*       c_tt                 = s->tt;
      UInt32        c_tPos               = s->tPos;
      char*         cs_next_out          = s->strm->next_out;
      unsigned int  cs_avail_out         = s->strm->avail_out;
      /* end restore */

      UInt32       avail_out_INIT = cs_avail_out;
      Int32        s_save_nblockPP = s->save_nblock+1;
      unsigned int total_out_lo32_old;

      while (True) {

654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700
	 /* try to finish existing run */
	 if (c_state_out_len > 0) {
	    while (True) {
	       if (cs_avail_out == 0) goto return_notr;
	       if (c_state_out_len == 1) break;
	       *( (UChar*)(cs_next_out) ) = c_state_out_ch;
	       BZ_UPDATE_CRC ( c_calculatedBlockCRC, c_state_out_ch );
	       c_state_out_len--;
	       cs_next_out++;
	       cs_avail_out--;
	    }
	    s_state_out_len_eq_one:
	    {
	       if (cs_avail_out == 0) {
		  c_state_out_len = 1; goto return_notr;
	       };
	       *( (UChar*)(cs_next_out) ) = c_state_out_ch;
	       BZ_UPDATE_CRC ( c_calculatedBlockCRC, c_state_out_ch );
	       cs_next_out++;
	       cs_avail_out--;
	    }
	 }
	 /* can a new run be started? */
	 if (c_nblock_used == s_save_nblockPP) {
	    c_state_out_len = 0; goto return_notr;
	 };
	 c_state_out_ch = c_k0;
	 BZ_GET_FAST_C(k1); c_nblock_used++;
	 if (k1 != c_k0) {
	    c_k0 = k1; goto s_state_out_len_eq_one;
	 };
	 if (c_nblock_used == s_save_nblockPP)
	    goto s_state_out_len_eq_one;

	 c_state_out_len = 2;
	 BZ_GET_FAST_C(k1); c_nblock_used++;
	 if (c_nblock_used == s_save_nblockPP) continue;
	 if (k1 != c_k0) { c_k0 = k1; continue; };

	 c_state_out_len = 3;
	 BZ_GET_FAST_C(k1); c_nblock_used++;
	 if (c_nblock_used == s_save_nblockPP) continue;
	 if (k1 != c_k0) { c_k0 = k1; continue; };

	 BZ_GET_FAST_C(k1); c_nblock_used++;
	 c_state_out_len = ((Int32)k1) + 4;
	 BZ_GET_FAST_C(c_k0); c_nblock_used++;
701 702 703 704 705 706
      }

      return_notr:
      total_out_lo32_old = s->strm->total_out_lo32;
      s->strm->total_out_lo32 += (avail_out_INIT - cs_avail_out);
      if (s->strm->total_out_lo32 < total_out_lo32_old)
707
	 s->strm->total_out_hi32++;
708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747

      /* save */
      s->calculatedBlockCRC = c_calculatedBlockCRC;
      s->state_out_ch       = c_state_out_ch;
      s->state_out_len      = c_state_out_len;
      s->nblock_used        = c_nblock_used;
      s->k0                 = c_k0;
      s->tt                 = c_tt;
      s->tPos               = c_tPos;
      s->strm->next_out     = cs_next_out;
      s->strm->avail_out    = cs_avail_out;
      /* end save */
   }
}


/*---------------------------------------------------*/
__inline__ Int32 BZ2_indexIntoF ( Int32 indx, Int32 *cftab )
{
   Int32 nb, na, mid;
   nb = 0;
   na = 256;
   do {
      mid = (nb + na) >> 1;
      if (indx >= cftab[mid]) nb = mid; else na = mid;
   }
   while (na - nb != 1);
   return nb;
}


/*---------------------------------------------------*/
static
void unRLE_obuf_to_output_SMALL ( DState* s )
{
   UChar k1;

   if (s->blockRandomised) {

      while (True) {
748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788
	 /* try to finish existing run */
	 while (True) {
	    if (s->strm->avail_out == 0) return;
	    if (s->state_out_len == 0) break;
	    *( (UChar*)(s->strm->next_out) ) = s->state_out_ch;
	    BZ_UPDATE_CRC ( s->calculatedBlockCRC, s->state_out_ch );
	    s->state_out_len--;
	    s->strm->next_out++;
	    s->strm->avail_out--;
	    s->strm->total_out_lo32++;
	    if (s->strm->total_out_lo32 == 0) s->strm->total_out_hi32++;
	 }

	 /* can a new run be started? */
	 if (s->nblock_used == s->save_nblock+1) return;


	 s->state_out_len = 1;
	 s->state_out_ch = s->k0;
	 BZ_GET_SMALL(k1); BZ_RAND_UPD_MASK;
	 k1 ^= BZ_RAND_MASK; s->nblock_used++;
	 if (s->nblock_used == s->save_nblock+1) continue;
	 if (k1 != s->k0) { s->k0 = k1; continue; };

	 s->state_out_len = 2;
	 BZ_GET_SMALL(k1); BZ_RAND_UPD_MASK;
	 k1 ^= BZ_RAND_MASK; s->nblock_used++;
	 if (s->nblock_used == s->save_nblock+1) continue;
	 if (k1 != s->k0) { s->k0 = k1; continue; };

	 s->state_out_len = 3;
	 BZ_GET_SMALL(k1); BZ_RAND_UPD_MASK;
	 k1 ^= BZ_RAND_MASK; s->nblock_used++;
	 if (s->nblock_used == s->save_nblock+1) continue;
	 if (k1 != s->k0) { s->k0 = k1; continue; };

	 BZ_GET_SMALL(k1); BZ_RAND_UPD_MASK;
	 k1 ^= BZ_RAND_MASK; s->nblock_used++;
	 s->state_out_len = ((Int32)k1) + 4;
	 BZ_GET_SMALL(s->k0); BZ_RAND_UPD_MASK;
	 s->k0 ^= BZ_RAND_MASK; s->nblock_used++;
789 790 791 792 793
      }

   } else {

      while (True) {
794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828
	 /* try to finish existing run */
	 while (True) {
	    if (s->strm->avail_out == 0) return;
	    if (s->state_out_len == 0) break;
	    *( (UChar*)(s->strm->next_out) ) = s->state_out_ch;
	    BZ_UPDATE_CRC ( s->calculatedBlockCRC, s->state_out_ch );
	    s->state_out_len--;
	    s->strm->next_out++;
	    s->strm->avail_out--;
	    s->strm->total_out_lo32++;
	    if (s->strm->total_out_lo32 == 0) s->strm->total_out_hi32++;
	 }

	 /* can a new run be started? */
	 if (s->nblock_used == s->save_nblock+1) return;

	 s->state_out_len = 1;
	 s->state_out_ch = s->k0;
	 BZ_GET_SMALL(k1); s->nblock_used++;
	 if (s->nblock_used == s->save_nblock+1) continue;
	 if (k1 != s->k0) { s->k0 = k1; continue; };

	 s->state_out_len = 2;
	 BZ_GET_SMALL(k1); s->nblock_used++;
	 if (s->nblock_used == s->save_nblock+1) continue;
	 if (k1 != s->k0) { s->k0 = k1; continue; };

	 s->state_out_len = 3;
	 BZ_GET_SMALL(k1); s->nblock_used++;
	 if (s->nblock_used == s->save_nblock+1) continue;
	 if (k1 != s->k0) { s->k0 = k1; continue; };

	 BZ_GET_SMALL(k1); s->nblock_used++;
	 s->state_out_len = ((Int32)k1) + 4;
	 BZ_GET_SMALL(s->k0); s->nblock_used++;
829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844
      }

   }
}


/*---------------------------------------------------*/
int BZ_API(BZ2_bzDecompress) ( bz_stream *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;

   while (True) {
845 846 847
#if defined(CONFIG_HW_WATCHDOG) || defined(CONFIG_WATCHDOG)
	WATCHDOG_RESET();
#endif
848 849
      if (s->state == BZ_X_IDLE) return BZ_SEQUENCE_ERROR;
      if (s->state == BZ_X_OUTPUT) {
850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868
	 if (s->smallDecompress)
	    unRLE_obuf_to_output_SMALL ( s ); else
	    unRLE_obuf_to_output_FAST  ( s );
	 if (s->nblock_used == s->save_nblock+1 && s->state_out_len == 0) {
	    BZ_FINALISE_CRC ( s->calculatedBlockCRC );
	    if (s->verbosity >= 3)
	       VPrintf2 ( " {0x%x, 0x%x}", 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;
	 }
869 870
      }
      if (s->state >= BZ_X_MAGIC_1) {
871 872 873 874 875 876 877 878 879 880
	 Int32 r = BZ2_decompress ( s );
	 if (r == BZ_STREAM_END) {
	    if (s->verbosity >= 3)
	       VPrintf2 ( "\n    combined CRCs: stored = 0x%x, computed = 0x%x",
			  s->storedCombinedCRC, s->calculatedCombinedCRC );
	    if (s->calculatedCombinedCRC != s->storedCombinedCRC)
	       return BZ_DATA_ERROR;
	    return r;
	 }
	 if (s->state != BZ_X_OUTPUT) return r;
881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945
      }
   }

   AssertH ( 0, 6001 );

   return 0;  /*NOTREACHED*/
}


/*---------------------------------------------------*/
int BZ_API(BZ2_bzDecompressEnd)  ( bz_stream *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;
}


#ifndef BZ_NO_STDIO
/*---------------------------------------------------*/
/*--- File I/O stuff                              ---*/
/*---------------------------------------------------*/

#define BZ_SETERR(eee)                    \
{                                         \
   if (bzerror != NULL) *bzerror = eee;   \
   if (bzf != NULL) bzf->lastErr = eee;   \
}

typedef
   struct {
      FILE*     handle;
      Char      buf[BZ_MAX_UNUSED];
      Int32     bufN;
      Bool      writing;
      bz_stream strm;
      Int32     lastErr;
      Bool      initialisedOk;
   }
   bzFile;


/*---------------------------------------------*/
static Bool myfeof ( FILE* f )
{
   Int32 c = fgetc ( f );
   if (c == EOF) return True;
   ungetc ( c, f );
   return False;
}


/*---------------------------------------------------*/
BZFILE* BZ_API(BZ2_bzWriteOpen)
946 947 948 949 950
		    ( int*  bzerror,
		      FILE* f,
		      int   blockSize100k,
		      int   verbosity,
		      int   workFactor )
951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980
{
   Int32   ret;
   bzFile* bzf = NULL;

   BZ_SETERR(BZ_OK);

   if (f == NULL ||
       (blockSize100k < 1 || blockSize100k > 9) ||
       (workFactor < 0 || workFactor > 250) ||
       (verbosity < 0 || verbosity > 4))
      { BZ_SETERR(BZ_PARAM_ERROR); return NULL; };

   if (ferror(f))
      { BZ_SETERR(BZ_IO_ERROR); return NULL; };

   bzf = malloc ( sizeof(bzFile) );
   if (bzf == NULL)
      { BZ_SETERR(BZ_MEM_ERROR); return NULL; };

   BZ_SETERR(BZ_OK);
   bzf->initialisedOk = False;
   bzf->bufN          = 0;
   bzf->handle        = f;
   bzf->writing       = True;
   bzf->strm.bzalloc  = NULL;
   bzf->strm.bzfree   = NULL;
   bzf->strm.opaque   = NULL;

   if (workFactor == 0) workFactor = 30;
   ret = BZ2_bzCompressInit ( &(bzf->strm), blockSize100k,
981
			      verbosity, workFactor );
982 983 984 985 986 987 988 989 990 991 992
   if (ret != BZ_OK)
      { BZ_SETERR(ret); free(bzf); return NULL; };

   bzf->strm.avail_in = 0;
   bzf->initialisedOk = True;
   return bzf;
}


/*---------------------------------------------------*/
void BZ_API(BZ2_bzWrite)
993 994 995 996
	     ( int*    bzerror,
	       BZFILE* b,
	       void*   buf,
	       int     len )
997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019
{
   Int32 n, n2, ret;
   bzFile* bzf = (bzFile*)b;

   BZ_SETERR(BZ_OK);
   if (bzf == NULL || buf == NULL || len < 0)
      { BZ_SETERR(BZ_PARAM_ERROR); return; };
   if (!(bzf->writing))
      { BZ_SETERR(BZ_SEQUENCE_ERROR); return; };
   if (ferror(bzf->handle))
      { BZ_SETERR(BZ_IO_ERROR); return; };

   if (len == 0)
      { BZ_SETERR(BZ_OK); return; };

   bzf->strm.avail_in = len;
   bzf->strm.next_in  = buf;

   while (True) {
      bzf->strm.avail_out = BZ_MAX_UNUSED;
      bzf->strm.next_out = bzf->buf;
      ret = BZ2_bzCompress ( &(bzf->strm), BZ_RUN );
      if (ret != BZ_RUN_OK)
1020
	 { BZ_SETERR(ret); return; };
1021 1022

      if (bzf->strm.avail_out < BZ_MAX_UNUSED) {
1023 1024 1025 1026 1027
	 n = BZ_MAX_UNUSED - bzf->strm.avail_out;
	 n2 = fwrite ( (void*)(bzf->buf), sizeof(UChar),
		       n, bzf->handle );
	 if (n != n2 || ferror(bzf->handle))
	    { BZ_SETERR(BZ_IO_ERROR); return; };
1028 1029 1030
      }

      if (bzf->strm.avail_in == 0)
1031
	 { BZ_SETERR(BZ_OK); return; };
1032 1033 1034 1035 1036 1037
   }
}


/*---------------------------------------------------*/
void BZ_API(BZ2_bzWriteClose)
1038 1039 1040 1041 1042
		  ( int*          bzerror,
		    BZFILE*       b,
		    int           abandon,
		    unsigned int* nbytes_in,
		    unsigned int* nbytes_out )
1043 1044
{
   BZ2_bzWriteClose64 ( bzerror, b, abandon,
1045
			nbytes_in, NULL, nbytes_out, NULL );
1046 1047 1048 1049
}


void BZ_API(BZ2_bzWriteClose64)
1050 1051 1052 1053 1054 1055 1056
		  ( int*          bzerror,
		    BZFILE*       b,
		    int           abandon,
		    unsigned int* nbytes_in_lo32,
		    unsigned int* nbytes_in_hi32,
		    unsigned int* nbytes_out_lo32,
		    unsigned int* nbytes_out_hi32 )
1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074
{
   Int32   n, n2, ret;
   bzFile* bzf = (bzFile*)b;

   if (bzf == NULL)
      { BZ_SETERR(BZ_OK); return; };
   if (!(bzf->writing))
      { BZ_SETERR(BZ_SEQUENCE_ERROR); return; };
   if (ferror(bzf->handle))
      { BZ_SETERR(BZ_IO_ERROR); return; };

   if (nbytes_in_lo32 != NULL) *nbytes_in_lo32 = 0;
   if (nbytes_in_hi32 != NULL) *nbytes_in_hi32 = 0;
   if (nbytes_out_lo32 != NULL) *nbytes_out_lo32 = 0;
   if (nbytes_out_hi32 != NULL) *nbytes_out_hi32 = 0;

   if ((!abandon) && bzf->lastErr == BZ_OK) {
      while (True) {
1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089
	 bzf->strm.avail_out = BZ_MAX_UNUSED;
	 bzf->strm.next_out = bzf->buf;
	 ret = BZ2_bzCompress ( &(bzf->strm), BZ_FINISH );
	 if (ret != BZ_FINISH_OK && ret != BZ_STREAM_END)
	    { BZ_SETERR(ret); return; };

	 if (bzf->strm.avail_out < BZ_MAX_UNUSED) {
	    n = BZ_MAX_UNUSED - bzf->strm.avail_out;
	    n2 = fwrite ( (void*)(bzf->buf), sizeof(UChar),
			  n, bzf->handle );
	    if (n != n2 || ferror(bzf->handle))
	       { BZ_SETERR(BZ_IO_ERROR); return; };
	 }

	 if (ret == BZ_STREAM_END) break;
1090 1091 1092 1093 1094 1095
      }
   }

   if ( !abandon && !ferror ( bzf->handle ) ) {
      fflush ( bzf->handle );
      if (ferror(bzf->handle))
1096
	 { BZ_SETERR(BZ_IO_ERROR); return; };
1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115
   }

   if (nbytes_in_lo32 != NULL)
      *nbytes_in_lo32 = bzf->strm.total_in_lo32;
   if (nbytes_in_hi32 != NULL)
      *nbytes_in_hi32 = bzf->strm.total_in_hi32;
   if (nbytes_out_lo32 != NULL)
      *nbytes_out_lo32 = bzf->strm.total_out_lo32;
   if (nbytes_out_hi32 != NULL)
      *nbytes_out_hi32 = bzf->strm.total_out_hi32;

   BZ_SETERR(BZ_OK);
   BZ2_bzCompressEnd ( &(bzf->strm) );
   free ( bzf );
}


/*---------------------------------------------------*/
BZFILE* BZ_API(BZ2_bzReadOpen)
1116 1117 1118 1119 1120 1121
		   ( int*  bzerror,
		     FILE* f,
		     int   verbosity,
		     int   small,
		     void* unused,
		     int   nUnused )
1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189
{
   bzFile* bzf = NULL;
   int     ret;

   BZ_SETERR(BZ_OK);

   if (f == NULL ||
       (small != 0 && small != 1) ||
       (verbosity < 0 || verbosity > 4) ||
       (unused == NULL && nUnused != 0) ||
       (unused != NULL && (nUnused < 0 || nUnused > BZ_MAX_UNUSED)))
      { BZ_SETERR(BZ_PARAM_ERROR); return NULL; };

   if (ferror(f))
      { BZ_SETERR(BZ_IO_ERROR); return NULL; };

   bzf = malloc ( sizeof(bzFile) );
   if (bzf == NULL)
      { BZ_SETERR(BZ_MEM_ERROR); return NULL; };

   BZ_SETERR(BZ_OK);

   bzf->initialisedOk = False;
   bzf->handle        = f;
   bzf->bufN          = 0;
   bzf->writing       = False;
   bzf->strm.bzalloc  = NULL;
   bzf->strm.bzfree   = NULL;
   bzf->strm.opaque   = NULL;

   while (nUnused > 0) {
      bzf->buf[bzf->bufN] = *((UChar*)(unused)); bzf->bufN++;
      unused = ((void*)( 1 + ((UChar*)(unused))  ));
      nUnused--;
   }

   ret = BZ2_bzDecompressInit ( &(bzf->strm), verbosity, small );
   if (ret != BZ_OK)
      { BZ_SETERR(ret); free(bzf); return NULL; };

   bzf->strm.avail_in = bzf->bufN;
   bzf->strm.next_in  = bzf->buf;

   bzf->initialisedOk = True;
   return bzf;
}


/*---------------------------------------------------*/
void BZ_API(BZ2_bzReadClose) ( int *bzerror, BZFILE *b )
{
   bzFile* bzf = (bzFile*)b;

   BZ_SETERR(BZ_OK);
   if (bzf == NULL)
      { BZ_SETERR(BZ_OK); return; };

   if (bzf->writing)
      { BZ_SETERR(BZ_SEQUENCE_ERROR); return; };

   if (bzf->initialisedOk)
      (void)BZ2_bzDecompressEnd ( &(bzf->strm) );
   free ( bzf );
}


/*---------------------------------------------------*/
int BZ_API(BZ2_bzRead)
1190 1191 1192 1193
	   ( int*    bzerror,
	     BZFILE* b,
	     void*   buf,
	     int     len )
1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214
{
   Int32   n, ret;
   bzFile* bzf = (bzFile*)b;

   BZ_SETERR(BZ_OK);

   if (bzf == NULL || buf == NULL || len < 0)
      { BZ_SETERR(BZ_PARAM_ERROR); return 0; };

   if (bzf->writing)
      { BZ_SETERR(BZ_SEQUENCE_ERROR); return 0; };

   if (len == 0)
      { BZ_SETERR(BZ_OK); return 0; };

   bzf->strm.avail_out = len;
   bzf->strm.next_out = buf;

   while (True) {

      if (ferror(bzf->handle))
1215
	 { BZ_SETERR(BZ_IO_ERROR); return 0; };
1216 1217

      if (bzf->strm.avail_in == 0 && !myfeof(bzf->handle)) {
1218 1219 1220 1221 1222 1223 1224
	 n = fread ( bzf->buf, sizeof(UChar),
		     BZ_MAX_UNUSED, bzf->handle );
	 if (ferror(bzf->handle))
	    { BZ_SETERR(BZ_IO_ERROR); return 0; };
	 bzf->bufN = n;
	 bzf->strm.avail_in = bzf->bufN;
	 bzf->strm.next_in = bzf->buf;
1225 1226 1227 1228 1229
      }

      ret = BZ2_bzDecompress ( &(bzf->strm) );

      if (ret != BZ_OK && ret != BZ_STREAM_END)
1230
	 { BZ_SETERR(ret); return 0; };
1231 1232

      if (ret == BZ_OK && myfeof(bzf->handle) &&
1233 1234
	  bzf->strm.avail_in == 0 && bzf->strm.avail_out > 0)
	 { BZ_SETERR(BZ_UNEXPECTED_EOF); return 0; };
1235 1236

      if (ret == BZ_STREAM_END)
1237 1238
	 { BZ_SETERR(BZ_STREAM_END);
	   return len - bzf->strm.avail_out; };
1239
      if (bzf->strm.avail_out == 0)
1240
	 { BZ_SETERR(BZ_OK); return len; };
1241 1242 1243 1244 1245 1246 1247 1248 1249

   }

   return 0; /*not reached*/
}


/*---------------------------------------------------*/
void BZ_API(BZ2_bzReadGetUnused)
1250 1251 1252 1253
		     ( int*    bzerror,
		       BZFILE* b,
		       void**  unused,
		       int*    nUnused )
1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275
{
   bzFile* bzf = (bzFile*)b;
   if (bzf == NULL)
      { BZ_SETERR(BZ_PARAM_ERROR); return; };
   if (bzf->lastErr != BZ_STREAM_END)
      { BZ_SETERR(BZ_SEQUENCE_ERROR); return; };
   if (unused == NULL || nUnused == NULL)
      { BZ_SETERR(BZ_PARAM_ERROR); return; };

   BZ_SETERR(BZ_OK);
   *nUnused = bzf->strm.avail_in;
   *unused = bzf->strm.next_in;
}
#endif


/*---------------------------------------------------*/
/*--- Misc convenience stuff                      ---*/
/*---------------------------------------------------*/
#ifndef BZ_NO_COMPRESS
/*---------------------------------------------------*/
int BZ_API(BZ2_bzBuffToBuffCompress)
1276 1277 1278 1279 1280 1281 1282
			 ( char*         dest,
			   unsigned int* destLen,
			   char*         source,
			   unsigned int  sourceLen,
			   int           blockSize100k,
			   int           verbosity,
			   int           workFactor )
1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298
{
   bz_stream strm;
   int ret;

   if (dest == NULL || destLen == NULL ||
       source == NULL ||
       blockSize100k < 1 || blockSize100k > 9 ||
       verbosity < 0 || verbosity > 4 ||
       workFactor < 0 || workFactor > 250)
      return BZ_PARAM_ERROR;

   if (workFactor == 0) workFactor = 30;
   strm.bzalloc = NULL;
   strm.bzfree = NULL;
   strm.opaque = NULL;
   ret = BZ2_bzCompressInit ( &strm, blockSize100k,
1299
			      verbosity, workFactor );
1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327
   if (ret != BZ_OK) return ret;

   strm.next_in = source;
   strm.next_out = dest;
   strm.avail_in = sourceLen;
   strm.avail_out = *destLen;

   ret = BZ2_bzCompress ( &strm, BZ_FINISH );
   if (ret == BZ_FINISH_OK) goto output_overflow;
   if (ret != BZ_STREAM_END) goto errhandler;

   /* normal termination */
   *destLen -= strm.avail_out;
   BZ2_bzCompressEnd ( &strm );
   return BZ_OK;

   output_overflow:
   BZ2_bzCompressEnd ( &strm );
   return BZ_OUTBUFF_FULL;

   errhandler:
   BZ2_bzCompressEnd ( &strm );
   return ret;
}
#endif /* BZ_NO_COMPRESS */

/*---------------------------------------------------*/
int BZ_API(BZ2_bzBuffToBuffDecompress)
1328 1329 1330 1331 1332 1333
			   ( char*         dest,
			     unsigned int* destLen,
			     char*         source,
			     unsigned int  sourceLen,
			     int           small,
			     int           verbosity )
1334 1335 1336 1337 1338
{
   bz_stream strm;
   int ret;

   if (destLen == NULL || source == NULL)
1339
	  return BZ_PARAM_ERROR;
1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352

   strm.bzalloc = NULL;
   strm.bzfree = NULL;
   strm.opaque = NULL;
   ret = BZ2_bzDecompressInit ( &strm, verbosity, small );
   if (ret != BZ_OK) return ret;

   strm.next_in = source;
   strm.next_out = dest;
   strm.avail_in = sourceLen;
   strm.avail_out = *destLen;

   ret = BZ2_bzDecompress ( &strm );
1353
   *destLen -= strm.avail_out;
1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409
   if (ret == BZ_OK) goto output_overflow_or_eof;
   if (ret != BZ_STREAM_END) goto errhandler;

   /* normal termination */
   BZ2_bzDecompressEnd ( &strm );
   return BZ_OK;

   output_overflow_or_eof:
   if (strm.avail_out > 0) {
      BZ2_bzDecompressEnd ( &strm );
      return BZ_UNEXPECTED_EOF;
   } else {
      BZ2_bzDecompressEnd ( &strm );
      return BZ_OUTBUFF_FULL;
   };

   errhandler:
   BZ2_bzDecompressEnd ( &strm );
   return ret;
}


/*---------------------------------------------------*/
/*--
   Code contributed by Yoshioka Tsuneo
   (QWF00133@niftyserve.or.jp/tsuneo-y@is.aist-nara.ac.jp),
   to support better zlib compatibility.
   This code is not _officially_ part of libbzip2 (yet);
   I haven't tested it, documented it, or considered the
   threading-safeness of it.
   If this code breaks, please contact both Yoshioka and me.
--*/
/*---------------------------------------------------*/

/*---------------------------------------------------*/
/*--
   return version like "0.9.0c".
--*/
const char * BZ_API(BZ2_bzlibVersion)(void)
{
   return BZ_VERSION;
}


#ifndef BZ_NO_STDIO
/*---------------------------------------------------*/

#if defined(_WIN32) || defined(OS2) || defined(MSDOS)
#   include <fcntl.h>
#   include <io.h>
#   define SET_BINARY_MODE(file) setmode(fileno(file),O_BINARY)
#else
#   define SET_BINARY_MODE(file)
#endif
static
BZFILE * bzopen_or_bzdopen
1410 1411 1412 1413
	       ( const char *path,   /* no use when bzdopen */
		 int fd,             /* no use when bzdopen */
		 const char *mode,
		 int open_mode)      /* bzopen: 0, bzdopen:1 */
1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430
{
   int    bzerr;
   char   unused[BZ_MAX_UNUSED];
   int    blockSize100k = 9;
   int    writing       = 0;
   char   mode2[10]     = "";
   FILE   *fp           = NULL;
   BZFILE *bzfp         = NULL;
   int    verbosity     = 0;
   int    workFactor    = 30;
   int    smallMode     = 0;
   int    nUnused       = 0;

   if (mode == NULL) return NULL;
   while (*mode) {
      switch (*mode) {
      case 'r':
1431
	 writing = 0; break;
1432
      case 'w':
1433
	 writing = 1; break;
1434
      case 's':
1435
	 smallMode = 1; break;
1436
      default:
1437 1438 1439
	 if (isdigit((int)(*mode))) {
	    blockSize100k = *mode-BZ_HDR_0;
	 }
1440 1441 1442 1443 1444 1445 1446 1447
      }
      mode++;
   }
   strcat(mode2, writing ? "w" : "r" );
   strcat(mode2,"b");   /* binary mode */

   if (open_mode==0) {
      if (path==NULL || strcmp(path,"")==0) {
1448 1449
	fp = (writing ? stdout : stdin);
	SET_BINARY_MODE(fp);
1450
      } else {
1451
	fp = fopen(path,mode2);
1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466
      }
   } else {
#ifdef BZ_STRICT_ANSI
      fp = NULL;
#else
      fp = fdopen(fd,mode2);
#endif
   }
   if (fp == NULL) return NULL;

   if (writing) {
      /* Guard against total chaos and anarchy -- JRS */
      if (blockSize100k < 1) blockSize100k = 1;
      if (blockSize100k > 9) blockSize100k = 9;
      bzfp = BZ2_bzWriteOpen(&bzerr,fp,blockSize100k,
1467
			     verbosity,workFactor);
1468 1469
   } else {
      bzfp = BZ2_bzReadOpen(&bzerr,fp,verbosity,smallMode,
1470
			    unused,nUnused);
1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486
   }
   if (bzfp == NULL) {
      if (fp != stdin && fp != stdout) fclose(fp);
      return NULL;
   }
   return bzfp;
}


/*---------------------------------------------------*/
/*--
   open file for read or write.
      ex) bzopen("file","w9")
      case path="" or NULL => use stdin or stdout.
--*/
BZFILE * BZ_API(BZ2_bzopen)
1487 1488
	       ( const char *path,
		 const char *mode )
1489 1490 1491 1492 1493 1494 1495
{
   return bzopen_or_bzdopen(path,-1,mode,/*bzopen*/0);
}


/*---------------------------------------------------*/
BZFILE * BZ_API(BZ2_bzdopen)
1496 1497
	       ( int fd,
		 const char *mode )
1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548
{
   return bzopen_or_bzdopen(NULL,fd,mode,/*bzdopen*/1);
}


/*---------------------------------------------------*/
int BZ_API(BZ2_bzread) (BZFILE* b, void* buf, int len )
{
   int bzerr, nread;
   if (((bzFile*)b)->lastErr == BZ_STREAM_END) return 0;
   nread = BZ2_bzRead(&bzerr,b,buf,len);
   if (bzerr == BZ_OK || bzerr == BZ_STREAM_END) {
      return nread;
   } else {
      return -1;
   }
}


/*---------------------------------------------------*/
int BZ_API(BZ2_bzwrite) (BZFILE* b, void* buf, int len )
{
   int bzerr;

   BZ2_bzWrite(&bzerr,b,buf,len);
   if(bzerr == BZ_OK){
      return len;
   }else{
      return -1;
   }
}


/*---------------------------------------------------*/
int BZ_API(BZ2_bzflush) (BZFILE *b)
{
   /* do nothing now... */
   return 0;
}


/*---------------------------------------------------*/
void BZ_API(BZ2_bzclose) (BZFILE* b)
{
   int bzerr;
   FILE *fp = ((bzFile *)b)->handle;

   if (b==NULL) {return;}
   if(((bzFile*)b)->writing){
      BZ2_bzWriteClose(&bzerr,b,0,NULL,NULL);
      if(bzerr != BZ_OK){
1549
	 BZ2_bzWriteClose(NULL,b,1,NULL,NULL);
1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593
      }
   }else{
      BZ2_bzReadClose(&bzerr,b);
   }
   if(fp!=stdin && fp!=stdout){
      fclose(fp);
   }
}


/*---------------------------------------------------*/
/*--
   return last error code
--*/
static char *bzerrorstrings[] = {
       "OK"
      ,"SEQUENCE_ERROR"
      ,"PARAM_ERROR"
      ,"MEM_ERROR"
      ,"DATA_ERROR"
      ,"DATA_ERROR_MAGIC"
      ,"IO_ERROR"
      ,"UNEXPECTED_EOF"
      ,"OUTBUFF_FULL"
      ,"CONFIG_ERROR"
      ,"???"   /* for future */
      ,"???"   /* for future */
      ,"???"   /* for future */
      ,"???"   /* for future */
      ,"???"   /* for future */
      ,"???"   /* for future */
};


const char * BZ_API(BZ2_bzerror) (BZFILE *b, int *errnum)
{
   int err = ((bzFile *)b)->lastErr;

   if(err>0) err = 0;
   *errnum = err;
   return bzerrorstrings[err*-1];
}
#endif

1594 1595 1596 1597
void bz_internal_error(int errcode)
{
	printf ("BZIP2 internal error %d\n", errcode);
}
1598 1599 1600 1601

/*-------------------------------------------------------------*/
/*--- end                                           bzlib.c ---*/
/*-------------------------------------------------------------*/