source: bootcd/isolinux/syslinux-6.03/com32/lib/memchr.c

/*
 * memchr.c
 */

#include <stddef.h>
#include <string.h>

void *memchr(const void *s, int c, size_t n)
{
    const unsigned char *sp = s;

    while (n--) {
        if (*sp == (unsigned char)c)
            return (void *)sp;
    }

    return NULL;
}