bzlib.c

   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)
	 { 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; };
   }
}


/*---------------------------------------------------*/
void BZ_API(BZ2_bzWriteClose)
		  ( int*          bzerror,
		    BZFILE*       b,
		    int           abandon,
		    unsigned int* nbytes_in,
		    unsigned int* nbytes_out )
{
   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 )
{
   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_bzReadOpen)
		   ( int*  bzerror,
		     FILE* f,
		     int   verbosity,
		     int   small,
		     void* unused,
		     int   nUnused )
{
   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)
	   ( int*    bzerror,
	     BZFILE* b,
	     void*   buf,
	     int     len )
{
   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))
	 { 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*/
}


/*---------------------------------------------------*/
void BZ_API(BZ2_bzReadGetUnused)
		     ( int*    bzerror,
		       BZFILE* b,
		       void**  unused,
		       int*    nUnused )
{
   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)
			 ( char*         dest,
			   unsigned int* destLen,
			   char*         source,
			   unsigned int  sourceLen,
			   int           blockSize100k,
			   int           verbosity,
			   int           workFactor )
{
   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;
}
#endif /* BZ_NO_COMPRESS */

/*---------------------------------------------------*/
int BZ_API(BZ2_bzBuffToBuffDecompress)
			   ( char*         dest,
			     unsigned int* destLen,
			     char*         source,
			     unsigned int  sourceLen,
			     int           small,
			     int           verbosity )
{
   bz_stream strm;
   int ret;

   if (destLen == NULL || source == NULL)
	  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;
}


/*---------------------------------------------------*/
/*--
   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
	       ( const char *path,   /* no use when bzdopen */
		 int fd,             /* no use when bzdopen */
		 const char *mode,
		 int open_mode)      /* bzopen: 0, bzdopen:1 */
{
   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 = 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;
}


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


/*---------------------------------------------------*/
BZFILE * BZ_API(BZ2_bzdopen)
	       ( int fd,
		 const char *mode )
{
   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){
	 BZ2_bzWriteClose(NULL,b,1,NULL,NULL);
      }
   }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

void bz_internal_error(int errcode)
{
	printf ("BZIP2 internal error %d\n", errcode);
}

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