lib/ansi/strcmp.c

   1 /*
   2  * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands.
   3  * See the copyright notice in the ACK home directory, in the file "Copyright".
   4  */
   5 /* $Id$ */
   6
   7 #include        <string.h>
   8
   9 int
  10 strcmp(register const char *s1, register const char *s2)
  11 {
  12         while (*s1 == *s2++) {
  13                 if (*s1++ == '\0') {
  14                         return 0;
  15                 }
  16         }
  17         if (*s1 == '\0') return -1;
  18         if (*--s2 == '\0') return 1;
  19         return (unsigned char) *s1 - (unsigned char) *s2;
  20 }