libc/string/strchr.c

   1 /*
   2  *  ZeX/OS
   3  *  Copyright (C) 2008  Tomas 'ZeXx86' Jedrzejek (zexx86@zexos.org)
   4  *  Copyright (C) 2009  Tomas 'ZeXx86' Jedrzejek (zexx86@zexos.org)
   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 3 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
  14  *  GNU 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, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20
  21 #include <string.h>
  22
  23 char *strchr (const char *s, int c)
  24 {
  25         for (; *s != (char) c; ++ s)
  26                 if (*s == '\0')
  27                         return (char *) 0;
  28
  29         return (char *) s;
  30 }
  31
  32 char *strrchr (const char *s, int c)
  33 {
  34         char *r = (char *) 0;
  35
  36         unsigned i;
  37         for (i = 0; s[i]; i ++)
  38                 if (s[i] == c)
  39                         r = (char *) s;
  40
  41         return (char *) r;
  42 }