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  * THIS CODE DOES NOT WORK AS ADVERTISED.
  16  * It is actually checking if s1 is a PREFIX of s2.
  17  * All calls to this function need to be checked to see
  18  * if that needs to be changed. Prefix checking is cheaper, so
  19  * should be kept if it's sufficient.
  20  */
  21
  22 /*
  23  * Check if s1 is a substring of s2.
  24  * If yes, then return 1, else return 0.
  25  */
  26
  27 int
  28 ssequal (char *s1, char *s2)
  29 {
  30     if (!s1)
  31         s1 = "";
  32     if (!s2)
  33         s2 = "";
  34
  35     while (*s1)
  36         if (*s1++ != *s2++)
  37             return 0;
  38     return 1;
  39 }