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Sources/opkg-lede/libbb/last_char_is.c

  1 /*
  2  * busybox library eXtended function
  3  *
  4  * Copyright (C) 2001 Larry Doolittle, <ldoolitt@recycle.lbl.gov>
  5  *
  6  * This program is free software; you can redistribute it and/or modify
  7  * it under the terms of the GNU General Public License as published by
  8  * the Free Software Foundation; either version 2 of the License, or
  9  * (at your option) any later version.
 10  *
 11  * This program is distributed in the hope that it will be useful,
 12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 14  * General Public License for more details.
 15  *
 16  * You should have received a copy of the GNU General Public License
 17  * along with this program; if not, write to the Free Software
 18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 19  *
 20  */
 21 
 22 #include <string.h>
 23 #include "libbb.h"
 24 
 25 /* Find out if the last character of a string matches the one given Don't
 26  * underrun the buffer if the string length is 0.  Also avoids a possible
 27  * space-hogging inline of strlen() per usage.
 28  */
 29 char *last_char_is(const char *s, int c)
 30 {
 31         char *sret;
 32         if (!s)
 33                 return NULL;
 34         sret = (char *)s + strlen(s) - 1;
 35         if (sret >= s && *sret == c) {
 36                 return sret;
 37         } else {
 38                 return NULL;
 39         }
 40 }
 41 

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