lib/libc/string/memchr.c

/*
** Copyright 2001, Manuel J. Petit. All rights reserved.
** Distributed under the terms of the NewOS License.
*/
/*
 * Copyright (c) 2008 Travis Geiselbrecht
 *
 * Use of this source code is governed by a MIT-style
 * license that can be found in the LICENSE file or at
 * https://opensource.org/licenses/MIT
 */
#include <string.h>
#include <sys/types.h>

void *
memchr(void const *buf, int c, size_t len) {
    size_t i;
    unsigned char const *b= buf;
    unsigned char        x= (c&0xff);

    for (i= 0; i< len; i++) {
        if (b[i]== x) {
            return (void *)(b+i);
        }
    }

    return NULL;
}