strchr.c

/* public domain rewrite of strchr(3) and strrchr(3) */
 
#include "ruby/missing.h"
 
size_t strlen(const char*);
 
char *
strchr(const char *s, int c)
{
    if (c == 0) return (char *)s + strlen(s);
    while (*s) {
        if (*s == c)
            return (char *)s;
        s++;
    }
    return 0;
}
 
char *
strrchr(const char *s, int c)
{
    const char *save;
 
    if (c == 0) return (char *)s + strlen(s);
    save = 0;
    while (*s) {
        if (*s == c)
            save = s;
        s++;
    }
    return (char *)save;
}