kernel/lib/libc/string/memchr.c

// Copyright 2016 The Fuchsia Authors
// Copyright 2001, Manuel J. Petit.
// 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;
}