github publish

VIDEO/LZW_EX.C

@@ -0,0 +1,92 @@
+#include "lzw.h"
+#include "lzwc.c"  //include nahrazuje MAK soubor.
+#include <stdio.h>
+
+#define MAX_BUFF 65536
+
+#define INPUT "testx"
+#define OUTPUT "testx.l"
+#define ARCH "e:\\SYSLOG.LZW"
+
+char input_buffer[MAX_BUFF*2];
+char output_buffer[MAX_BUFF*2];
+
+FILE *in,*out;
+
+int datasize;
+int compsize;
+
+void open_files(char *sr,char *tg)
+  {
+  in=fopen(sr,"rb");
+  out=fopen(tg,"wb");
+  if (in==NULL || out==NULL) abort();
+  }
+
+void close_files()
+  {
+  fclose(in);
+  fclose(out);
+  }
+
+
+void read_normal()
+  {
+
+  datasize=fread(input_buffer,1,MAX_BUFF,in);
+  }
+
+void save_normal()
+  {
+
+  fwrite(output_buffer,1,datasize,out);
+  }
+
+
+int read_comp()
+  {
+  fread(&datasize,1,sizeof(datasize),in);
+  fread(&compsize,1,sizeof(datasize),in);
+  return fread(input_buffer,1,compsize,in);
+  }
+
+void save_comp()
+  {
+  fwrite(&datasize,1,sizeof(datasize),out);
+  fwrite(&compsize,1,sizeof(datasize),out);
+  fwrite(output_buffer,1,compsize,out);
+  }
+
+
+main()
+  {
+  puts("");
+
+  init_lzw_compressor(8);
+  open_files(INPUT,ARCH);
+  read_normal();
+  while (datasize!=0)
+     {
+     memset(output_buffer,0,sizeof(output_buffer));
+     compsize=lzw_encode(input_buffer,output_buffer,datasize);
+     printf("Origin: %d Packed: %d Ratio %d%%\n",datasize,compsize,compsize*100/datasize);
+     save_comp();
+     read_normal();
+     reinit_lzw();
+     }
+  close_files();
+  done_lzw_compressor();
+  init_lzw_compressor(8);
+  open_files(ARCH,OUTPUT);
+  while (read_comp())
+     {
+     lzw_decode(input_buffer,output_buffer);
+     save_normal();
+     reinit_lzw();
+     }
+  done_lzw_compressor();
+  printf("Compressed file has been extracted back\n");
+  close_files();
+  printf("and saved as %s.\n",OUTPUT);
+  }
+