/*
 * Copyright (c) 2018 Yubico AB. All rights reserved.
 * Use of this source code is governed by a BSD-style
 * license that can be found in the LICENSE file.
 */

#include "fido.h"

int
fido_buf_read(const unsigned char **buf, size_t *len, void *dst, size_t count)
{
        if (count > *len)
                return (-1);

        memcpy(dst, *buf, count);
        *buf += count;
        *len -= count;

        return (0);
}

int
fido_buf_write(unsigned char **buf, size_t *len, const void *src, size_t count)
{
        if (count > *len)
                return (-1);

        memcpy(*buf, src, count);
        *buf += count;
        *len -= count;

        return (0);
}