utils/devbios/comp.c

   1 /* Simple utility to compare 2 files.
   2  * Diff or cmp are not sufficient, when
   3  * comparing bioses :-)
   4  *
   5  * Copyright (c) 1998-2000 by Stefan Reinauer
   6  */
   7
   8
   9 #include <stdio.h>
  10
  11 int main (int argc, char *argv[])
  12 {
  13    FILE *eins,*zwei;
  14    int a,b,i=0,flag=0;
  15
  16    if(argv[1]==NULL||argv[2]==NULL) {
  17         printf ("Usage: %s file1 file2\n  %s compares two files.\n",argv[0],argv[0]);
  18         return 0;
  19    }
  20    eins=fopen(argv[1],"r");
  21    zwei=fopen(argv[2],"r");
  22
  23    if (eins==NULL) {
  24         printf ("File %s not found or unreadable.\n",argv[1]);
  25         return 0;
  26    }
  27    if (zwei==NULL) {
  28         printf ("File %s not found or unreadable.\n",argv[2]);
  29         fclose (eins);
  30         return 0;
  31    }
  32
  33    while (!feof(eins)) {
  34         a=fgetc(eins);
  35         b=fgetc(zwei);
  36         if (flag==0 && (a==-1||b==-1) && (a!=-1||b!=-1)) {
  37                 printf ("One file ended. Printing the rest of the other.\n");
  38                 flag=1;
  39         }
  40         if(a!=b) printf ("0x%06x: 0x%02x -> 0x%02x\n",i,a,b);
  41         i++;
  42    }
  43
  44    fclose(eins);
  45    fclose(zwei);
  46    return 0;
  47 }