/* chiyo0.c - Don Yang (uguu.org)

   11/05/02
                                                                           */

#include<stdio.h>

int main(int argc, char **argv)
{
   unsigned int table[256], crc, i, j;
   FILE *infile;
   int c;

   if( argc < 2 )
      return printf("%s <file> [...]\n", *argv);

   for(i = 0; i < 256; i++)
   {
      crc = i;
      for(j = 8; j > 0; j--)
      {
         if( (crc & 1) != 0 )
            crc = (crc >> 1) ^ 0xedb88320;
         else
            crc >>= 1;
      }
      table[i] = crc;
   }

   for(i = 1; i < argc; i++)
   {
      if( (infile = fopen(argv[i], "rb")) == NULL )
      {
         printf("Can not open %s\n", argv[i]);
         continue;
      }
      crc = 0xffffffff;
      while( (c = fgetc(infile)) != EOF )
         crc = ((crc >> 8) & 0xffffff) ^ table[(crc ^ c) & 0xff];
      (void)fclose(infile);
      printf("%s: %08x\n", argv[i], crc ^ 0xffffffff);
   }
   return 0;
}