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/* ****************************************************************************
* string/strchr.c -- Look for a character in a string.
*
* Copyright (C) 2017 Thomas "Cakeisalie5" Touhey <thomas@touhey.fr>
*
* This file is part of the 'all/core' module in libcarrot, an experimental
* modular libc project.
*
* This file is free software: you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option)
* any later version.
*
* This file is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Lesser Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this file. If not, see <http://www.gnu.org/licenses/>.
* ************************************************************************* */
#include <string.h>
/**
* strchr:
* Look for the first occurrence of a character in a string.
*
* @arg s the string.
* @arg c the character.
* @return the result (NULL if not found).
*/
char *strchr(const char *s, int c)
{
for (; *s && *s != c; s++);
return (*s == c ? (char*)s : NULL);
}
/**
* strrchr:
* Look for the last occurrence of a character in a string.
*
* @arg s the string.
* @arg c the character.
* @return the result (NULL if not found).
*/
char *strrchr(const char *s, int c)
{
const char *occ = NULL;
while (*(++s - 1)) if (*s == c) occ = s;
return ((char*)occ);
}
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