diplodocus.org Git - nmh/blob - sbr/ssequal.c

   1
   2 /*
   3  * ssequal.c -- check if a string is a substring of another
   4  *
   5  * $Id$
   6  *
   7  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   8  * COPYRIGHT file in the root directory of the nmh distribution for
   9  * complete copyright information.
  10  */
  11
  12 #include <h/mh.h>
  13
  14 /*
  15  * Check if s1 is a substring of s2.
  16  * If yes, then return 1, else return 0.
  17  */
  18
  19 int
  20 ssequal (char *s1, char *s2)
  21 {
  22     if (!s1)
  23         s1 = "";
  24     if (!s2)
  25         s2 = "";
  26
  27     while (*s1)
  28         if (*s1++ != *s2++)
  29             return 0;
  30     return 1;
  31 }