Subversion Repositories HelenOS

/** Find first occurence of character in string.

 *

 * @param s String to search.

 * @param i Character to look for.

 *

 * @return  Pointer to character in @a s or NULL if not found.

 */

extern char *strchr(const char *s, int i)

{

    while (*s != '\0') {

        if (*s == i) return (char *) s;

        ++s;

    }

    return NULL;

}

/** Find last occurence of character in string.

 *

 * @param s String to search.

 * @param i Character to look for.

 *

 * @return  Pointer to character in @a s or NULL if not found.

 */

extern char *strrchr(const char *s, int i)

{

    const char *start;

    start = s;

    if (*s == '\0') return NULL;

    while (*s != '\0') ++s;

    while (s != start) {

        --s;

        if (*s == i) return (char *) s;

    }

    return NULL;

}