lzw.c

来自「GZip Compress Souce Code」· C语言 代码 · 共 56 行

/* lzw.c -- compress files in LZW format.
 * This is a dummy version avoiding patent problems.
 */

#ifdef RCSID
static char rcsid[] = "$Id: lzw.c,v 0.9 1993/06/10 13:27:31 jloup Exp $";
#endif

#include "tailor.h"
#include "gzip.h"
#include "lzw.h"

#include "bsdebug.h"
//#define _DEBUG_LZW_C_
#ifdef DBGPrintfi
#undef DBGPrintfi
#endif
#ifdef DBGPrintfo
#undef DBGPrintfo
#endif

#if defined(_TRACEHELPER_DEBUG_ALL_)
  #define DBGPrintfi(a) DbgPrintfi a;
  #define DBGPrintfo(a) DbgPrintfo a;
#elif defined(_DEBUG_LZW_C_) && defined(_TRACEHELPER_DEBUG_EACH_OF_FILE_)
  #define DBGPrintfi(a) DbgPrintfi a;
  #define DBGPrintfo(a) DbgPrintfo a;
#else
  #define DBGPrintfi(a)
  #define DBGPrintfo(a)
#endif


static int msg_done = 0;

/* Compress in to out with lzw method. */
int lzw(in, out)
    int in, out;
{
  DBGPrintfi(("lzw(In)\r\n"));
  {
    if (msg_done) { 
                   DBGPrintfo(("lzw(out1)\r\n"));
                   return  ERROR; 
                  }
    msg_done = 1;
    fprintf(stderr,"output in compress .Z format not supported\n");
    if (in != out) { /* avoid warnings on unused variables */
        exit_code = ERROR;
    }
    DBGPrintfo(("lzw(out2)\r\n"));
    return  ERROR;

  }
}