bzlib.c File Reference

#include "bzlib_private.h"

Go to the source code of this file.

Data Structures
struct	bzFile

Macros
#define	ADD_CHAR_TO_BLOCK(zs, zchh0)
#define	BZ_SETERR(eee)
#define	SET_BINARY_MODE(file)

Functions
ABC_NAMESPACE_IMPL_START void	BZ2_bz__AssertH__fail (int errcode)
static int	bz_config_ok (void)
static void *	default_bzalloc (void *opaque, Int32 items, Int32 size)
static void	default_bzfree (void *opaque, void *addr)
static void	prepare_new_block (EState *s)
static void	init_RL (EState *s)
static Bool	isempty_RL (EState *s)
int BZ_API()	BZ2_bzCompressInit (bz_stream *strm, int blockSize100k, int verbosity, int workFactor)
static void	add_pair_to_block (EState *s)
static void	flush_RL (EState *s)
static Bool	copy_input_until_stop (EState *s)
static Bool	copy_output_until_stop (EState *s)
static Bool	handle_compress (bz_stream *strm)
int BZ_API()	BZ2_bzCompress (bz_stream *strm, int action)
int BZ_API()	BZ2_bzCompressEnd (bz_stream *strm)
int BZ_API()	BZ2_bzDecompressInit (bz_stream *strm, int verbosity, int small)
static Bool	unRLE_obuf_to_output_FAST (DState *s)
Int32	BZ2_indexIntoF (Int32 indx, Int32 *cftab)
static Bool	unRLE_obuf_to_output_SMALL (DState *s)
int BZ_API()	BZ2_bzDecompress (bz_stream *strm)
int BZ_API()	BZ2_bzDecompressEnd (bz_stream *strm)
static Bool	myfeof (FILE *f)
BZFILE *BZ_API()	BZ2_bzWriteOpen (int *bzerror, FILE *f, int blockSize100k, int verbosity, int workFactor)
void BZ_API()	BZ2_bzWrite (int *bzerror, BZFILE *b, void *buf, int len)
void BZ_API()	BZ2_bzWriteClose (int *bzerror, BZFILE *b, int abandon, unsigned int *nbytes_in, unsigned int *nbytes_out)
void BZ_API()	BZ2_bzWriteClose64 (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)
BZFILE *BZ_API()	BZ2_bzReadOpen (int *bzerror, FILE *f, int verbosity, int small, void *unused, int nUnused)
void BZ_API()	BZ2_bzReadClose (int *bzerror, BZFILE *b)
int BZ_API()	BZ2_bzRead (int *bzerror, BZFILE *b, void *buf, int len)
void BZ_API()	BZ2_bzReadGetUnused (int *bzerror, BZFILE *b, void **unused, int *nUnused)
int BZ_API()	BZ2_bzBuffToBuffCompress (char *dest, unsigned int *destLen, char *source, unsigned int sourceLen, int blockSize100k, int verbosity, int workFactor)
int BZ_API()	BZ2_bzBuffToBuffDecompress (char *dest, unsigned int *destLen, char *source, unsigned int sourceLen, int small, int verbosity)
const char *BZ_API()	BZ2_bzlibVersion (void)
static BZFILE *	bzopen_or_bzdopen (const char *path, int fd, const char *mode, int open_mode)
BZFILE *BZ_API()	BZ2_bzopen (const char *path, const char *mode)
BZFILE *BZ_API()	BZ2_bzdopen (int fd, const char *mode)
int BZ_API()	BZ2_bzread (BZFILE *b, void *buf, int len)
int BZ_API()	BZ2_bzwrite (BZFILE *b, void *buf, int len)
int BZ_API()	BZ2_bzflush (BZFILE *b)
void BZ_API()	BZ2_bzclose (BZFILE *b)
const char *BZ_API()	BZ2_bzerror (BZFILE *b, int *errnum)

Variables
static const char *	bzerrorstrings []

Macro Definition Documentation

#define ADD_CHAR_TO_BLOCK	(		zs,
			zchh0
	)

Value:

{                                                 \
   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)                  \
         add_pair_to_block ( zs );                \
      zs->state_in_ch = zchh;                     \
      zs->state_in_len = 1;                       \
   } else {                                       \
      zs->state_in_len++;                         \
   }                                              \
}

Definition at line 271 of file bzlib.c.

#define BZ_SETERR

(

eee

)

Value:

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

Definition at line 897 of file bzlib.c.

#define SET_BINARY_MODE

(

file

)

Definition at line 1391 of file bzlib.c.

Function Documentation

static void add_pair_to_block ( EState *  s )

static

Definition at line 227 of file bzlib.c.

{
   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:
         s->block[s->nblock] = (UChar)ch; s->nblock++;
         break;
      case 2:
         s->block[s->nblock] = (UChar)ch; s->nblock++;
         s->block[s->nblock] = (UChar)ch; s->nblock++;
         break;
      case 3:
         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;
      default:
         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;
   }
}

ABC_NAMESPACE_IMPL_START void BZ2_bz__AssertH__fail

(

int

errcode

)

Definition at line 52 of file bzlib.c.

{
   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@bzip.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, 10 December 2007.\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);
}

int BZ_API() BZ2_bzBuffToBuffCompress	(	char *	dest,
		unsigned int *	destLen,
		char *	source,
		unsigned int	sourceLen,
		int	blockSize100k,
		int	verbosity,
		int	workFactor
	)

Definition at line 1259 of file bzlib.c.

{
   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, 
                              verbosity, workFactor );
   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;
}

int BZ_API() BZ2_bzBuffToBuffDecompress	(	char *	dest,
		unsigned int *	destLen,
		char *	source,
		unsigned int	sourceLen,
		int	small,
		int	verbosity
	)

Definition at line 1311 of file bzlib.c.

{
   bz_stream strm;
   int ret;

   if (dest == NULL || destLen == NULL || 
       source == NULL ||
       (small != 0 && small != 1) ||
       verbosity < 0 || verbosity > 4) 
          return BZ_PARAM_ERROR;

   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 );
   if (ret == BZ_OK) goto output_overflow_or_eof;
   if (ret != BZ_STREAM_END) goto errhandler;

   /* normal termination */
   *destLen -= strm.avail_out;
   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; 
}

void BZ_API() BZ2_bzclose

(

BZFILE *

b

)

Definition at line 1525 of file bzlib.c.

{
   int bzerr;
   FILE *fp;
   
   if (b==NULL) {return;}
   fp = ((bzFile *)b)->handle;
   if(((bzFile*)b)->writing){
      BZ2_bzWriteClose(&bzerr,b,0,NULL,NULL);
      if(bzerr != BZ_OK){
         BZ2_bzWriteClose(NULL,b,1,NULL,NULL);
      }
   }else{
      BZ2_bzReadClose(&bzerr,b);
   }
   if(fp!=stdin && fp!=stdout){
      fclose(fp);
   }
}

int BZ_API() BZ2_bzCompress	(	bz_stream *	strm,
		int	action
	)

Definition at line 418 of file bzlib.c.

{
   Bool progress;
   EState* s;
   if (strm == NULL) return BZ_PARAM_ERROR;
   s = (EState *)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:
         return BZ_SEQUENCE_ERROR;

      case BZ_M_RUNNING:
         if (action == BZ_RUN) {
            progress = handle_compress ( strm );
            return progress ? BZ_RUN_OK : BZ_PARAM_ERROR;
         } 
         else
     if (action == BZ_FLUSH) {
            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;

      case BZ_M_FLUSHING:
         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;

      case BZ_M_FINISHING:
         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;
   }
   return BZ_OK; /*--not reached--*/
}

int BZ_API() BZ2_bzCompressEnd

(

bz_stream *

strm

)

Definition at line 479 of file bzlib.c.

{
   EState* s;
   if (strm == NULL) return BZ_PARAM_ERROR;
   s = (EState *)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;
}

int BZ_API() BZ2_bzCompressInit	(	bz_stream *	strm,
		int	blockSize100k,
		int	verbosity,
		int	workFactor
	)

Definition at line 160 of file bzlib.c.

{
   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 = (EState *)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 = (unsigned *)BZALLOC( n                  * sizeof(UInt32) );
   s->arr2 = (unsigned *)BZALLOC( (n+BZ_N_OVERSHOOT) * sizeof(UInt32) );
   s->ftab = (unsigned *)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;
}

int BZ_API() BZ2_bzDecompress

(

bz_stream *

strm

)

Definition at line 819 of file bzlib.c.

{
   Bool    corrupt;
   DState* s;
   if (strm == NULL) return BZ_PARAM_ERROR;
   s = (DState *)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) {
            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 0;  /*NOTREACHED*/
}

int BZ_API() BZ2_bzDecompressEnd

(

bz_stream *

strm

)

Definition at line 873 of file bzlib.c.

{
   DState* s;
   if (strm == NULL) return BZ_PARAM_ERROR;
   s = (DState *)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;
}

int BZ_API() BZ2_bzDecompressInit	(	bz_stream *	strm,
		int	verbosity,
		int	small
	)

Definition at line 504 of file bzlib.c.

{
   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 = (DState *)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;
}

BZFILE* BZ_API() BZ2_bzdopen	(	int	fd,
		const char *	mode
	)

Definition at line 1481 of file bzlib.c.

{
   return bzopen_or_bzdopen(NULL,fd,mode,/*bzdopen*/1);
}

const char* BZ_API() BZ2_bzerror	(	BZFILE *	b,
		int *	errnum
	)

Definition at line 1570 of file bzlib.c.

{
   int err = ((bzFile *)b)->lastErr;

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

int BZ_API() BZ2_bzflush

(

BZFILE *

b

)

Definition at line 1517 of file bzlib.c.

{
   /* do nothing now... */
   return 0;
}

const char* BZ_API() BZ2_bzlibVersion

(

void

)

Definition at line 1377 of file bzlib.c.

{
   return BZ_VERSION;
}

BZFILE* BZ_API() BZ2_bzopen	(	const char *	path,
		const char *	mode
	)

Definition at line 1472 of file bzlib.c.

{
   return bzopen_or_bzdopen(path,-1,mode,/*bzopen*/0);
}

int BZ_API() BZ2_bzRead	(	int *	bzerror,
		BZFILE *	b,
		void *	buf,
		int	len
	)

Definition at line 1173 of file bzlib.c.

{
   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 = (char *)buf;

   while (True) {

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

      if (bzf->strm.avail_in == 0 && !myfeof(bzf->handle)) {
         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;
      }

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

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

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

      if (ret == BZ_STREAM_END)
         { BZ_SETERR(BZ_STREAM_END);
           return len - bzf->strm.avail_out; };
      if (bzf->strm.avail_out == 0)
         { BZ_SETERR(BZ_OK); return len; };
      
   }

   return 0; /*not reached*/
}

int BZ_API() BZ2_bzread	(	BZFILE *	b,
		void *	buf,
		int	len
	)

Definition at line 1489 of file bzlib.c.

{
   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;
   }
}

void BZ_API() BZ2_bzReadClose	(	int *	bzerror,
		BZFILE *	b
	)

Definition at line 1154 of file bzlib.c.

{
   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 );
}

void BZ_API() BZ2_bzReadGetUnused	(	int *	bzerror,
		BZFILE *	b,
		void **	unused,
		int *	nUnused
	)

Definition at line 1233 of file bzlib.c.

{
   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;
}

BZFILE* BZ_API() BZ2_bzReadOpen	(	int *	bzerror,
		FILE *	f,
		int	verbosity,
		int	small,
		void *	unused,
		int	nUnused
	)

Definition at line 1099 of file bzlib.c.

{
   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 = (bzFile *)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_bzWrite	(	int *	bzerror,
		BZFILE *	b,
		void *	buf,
		int	len
	)

Definition at line 976 of file bzlib.c.

{
   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  = (char *)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)
         { 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 (bzf->strm.avail_in == 0)
         { BZ_SETERR(BZ_OK); return; };
   }
}

int BZ_API() BZ2_bzwrite	(	BZFILE *	b,
		void *	buf,
		int	len
	)

Definition at line 1503 of file bzlib.c.

{
   int bzerr;

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

void BZ_API() BZ2_bzWriteClose	(	int *	bzerror,
		BZFILE *	b,
		int	abandon,
		unsigned int *	nbytes_in,
		unsigned int *	nbytes_out
	)

Definition at line 1021 of file bzlib.c.

{
   BZ2_bzWriteClose64 ( bzerror, b, abandon, 
                        nbytes_in, NULL, nbytes_out, NULL );
}

void BZ_API() BZ2_bzWriteClose64	(	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
	)

Definition at line 1033 of file bzlib.c.

{
   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) {
         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;
      }
   }

   if ( !abandon && !ferror ( bzf->handle ) ) {
      fflush ( bzf->handle );
      if (ferror(bzf->handle))
         { BZ_SETERR(BZ_IO_ERROR); return; };
   }

   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_bzWriteOpen	(	int *	bzerror,
		FILE *	f,
		int	blockSize100k,
		int	verbosity,
		int	workFactor
	)

Definition at line 928 of file bzlib.c.

{
   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 = (bzFile *)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, 
                              verbosity, workFactor );
   if (ret != BZ_OK)
      { BZ_SETERR(ret); free(bzf); return NULL; };

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

Int32 BZ2_indexIntoF	(	Int32	indx,
		Int32 *	cftab
	)

Definition at line 698 of file bzlib.c.

{
   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 int bz_config_ok ( void  )

static

Definition at line 102 of file bzlib.c.

{
   if (sizeof(int)   != 4) return 0;
   if (sizeof(short) != 2) return 0;
   if (sizeof(char)  != 1) return 0;
   return 1;
}

static BZFILE* bzopen_or_bzdopen ( const char *  path, int  fd, const char *  mode, int  open_mode  )

static

Definition at line 1395 of file bzlib.c.

{
   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':
         writing = 0; break;
      case 'w':
         writing = 1; break;
      case 's':
         smallMode = 1; break;
      default:
         if (isdigit((int)(*mode))) {
            blockSize100k = *mode-BZ_HDR_0;
         }
      }
      mode++;
   }
   strcat(mode2, writing ? "w" : "r" );
   strcat(mode2,"b");   /* binary mode */

   if (open_mode==0) {
      if (path==NULL || strcmp(path,"")==0) {
        fp = (writing ? stdout : stdin);
        SET_BINARY_MODE(fp);
      } else {
        fp = fopen(path,mode2);
      }
   } else {
#ifdef BZ_STRICT_ANSI
      fp = NULL;
#else
      fp = (FILE *)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,
                             verbosity,workFactor);
   } else {
      bzfp = BZ2_bzReadOpen(&bzerr,fp,verbosity,smallMode,
                            unused,nUnused);
   }
   if (bzfp == NULL) {
      if (fp != stdin && fp != stdout) fclose(fp);
      return NULL;
   }
   return bzfp;
}

static Bool copy_input_until_stop ( EState *  s )

static

Definition at line 300 of file bzlib.c.

{
   Bool progress_in = False;

   if (s->mode == BZ_M_RUNNING) {

      /*-- fast track the common case --*/
      while (True) {
         /*-- 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++;
      }

   } else {

      /*-- general, uncommon case --*/
      while (True) {
         /*-- 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--;
      }
   }
   return progress_in;
}

static Bool copy_output_until_stop ( EState *  s )

static

Definition at line 345 of file bzlib.c.

{
   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 void* default_bzalloc ( void *  opaque, Int32  items, Int32  size  )

static

Definition at line 113 of file bzlib.c.

{
   void* v = malloc ( items * size );
   return v;
}

static void default_bzfree ( void *  opaque, void *  addr  )

static

Definition at line 120 of file bzlib.c.

{
   if (addr != NULL) free ( addr );
}

static void flush_RL ( EState *  s )

static

Definition at line 263 of file bzlib.c.

{
   if (s->state_in_ch < 256) add_pair_to_block ( s );
   init_RL ( s );
}

static Bool handle_compress ( bz_stream *  strm )

static

Definition at line 372 of file bzlib.c.

{
   Bool progress_in  = False;
   Bool progress_out = False;
   EState* s = (EState *)strm->state;
   
   while (True) {

      if (s->state == BZ_S_OUTPUT) {
         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;
      }

      if (s->state == BZ_S_INPUT) {
         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;
         }
      }

   }

   return progress_in || progress_out;
}

static void init_RL ( EState *  s )

static

Definition at line 142 of file bzlib.c.

{
   s->state_in_ch  = 256;
   s->state_in_len = 0;
}

static Bool isempty_RL ( EState *  s )

static

Definition at line 150 of file bzlib.c.

{
   if (s->state_in_ch < 256 && s->state_in_len > 0)
      return False; else
      return True;
}

static Bool myfeof ( FILE *  f )

static

Definition at line 917 of file bzlib.c.

{
   Int32 c = fgetc ( f );
   if (c == EOF) return True;
   ungetc ( c, f );
   return False;
}

static void prepare_new_block ( EState *  s )

static

Definition at line 128 of file bzlib.c.

{
   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 Bool unRLE_obuf_to_output_FAST ( DState *  s )

static

Definition at line 547 of file bzlib.c.

{
   UChar k1;

   if (s->blockRandomised) {

      while (True) {
         /* try to finish existing run */
         while (True) {
            if (s->strm->avail_out == 0) return False;
            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 False;
               
         /* Only caused by corrupt data stream? */
         if (s->nblock_used > s->save_nblock+1)
            return True;
   
         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++;
      }

   } 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;
      Int32         ro_blockSize100k     = s->blockSize100k;
      /* 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) {

         /* 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--;
            }
         }   
         /* Only caused by corrupt data stream? */
         if (c_nblock_used > s_save_nblockPP)
            return True;

         /* 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++;
      }

      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)
         s->strm->total_out_hi32++;

      /* 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 */
   }
   return False;
}

static Bool unRLE_obuf_to_output_SMALL ( DState *  s )

static

Definition at line 717 of file bzlib.c.

{
   UChar k1;

   if (s->blockRandomised) {

      while (True) {
         /* try to finish existing run */
         while (True) {
            if (s->strm->avail_out == 0) return False;
            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 False;

         /* Only caused by corrupt data stream? */
         if (s->nblock_used > s->save_nblock+1)
            return True;
   
         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++;
      }

   } else {

      while (True) {
         /* try to finish existing run */
         while (True) {
            if (s->strm->avail_out == 0) return False;
            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 False;

         /* Only caused by corrupt data stream? */
         if (s->nblock_used > s->save_nblock+1)
            return True;
   
         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++;
      }

   }
}

Variable Documentation

const char* bzerrorstrings[]

static

Initial value:

= {
       "OK"
      ,"SEQUENCE_ERROR"
      ,"PARAM_ERROR"
      ,"MEM_ERROR"
      ,"DATA_ERROR"
      ,"DATA_ERROR_MAGIC"
      ,"IO_ERROR"
      ,"UNEXPECTED_EOF"
      ,"OUTBUFF_FULL"
      ,"CONFIG_ERROR"
      ,"???"   
      ,"???"   
      ,"???"   
      ,"???"   
      ,"???"   
      ,"???"   
}

Definition at line 1550 of file bzlib.c.