toolchain/gcc/libiberty/bcmp.c

   1 /* bcmp
   2    This function is in the public domain.  */
   3
   4 /*
   5
   6 @deftypefn Supplemental int bcmp (char *@var{x}, char *@var{y}, int @var{count})
   7
   8 Compares the first @var{count} bytes of two areas of memory.  Returns
   9 zero if they are the same, nonzero otherwise.  Returns zero if
  10 @var{count} is zero.  A nonzero result only indicates a difference,
  11 it does not indicate any sorting order (say, by having a positive
  12 result mean @var{x} sorts before @var{y}).
  13
  14 @end deftypefn
  15
  16 */
  17
  18
  19 int
  20 bcmp (from, to, count)
  21   char *from, *to;
  22   int count;
  23 {
  24   int rtnval = 0;
  25
  26   while (count-- > 0)
  27     {
  28       if (*from++ != *to++)
  29         {
  30           rtnval = 1;
  31           break;
  32         }
  33     }
  34   return (rtnval);
  35 }
  36