/*-
 * SPDX-License-Identifier: BSD-2-Clause
 *
 * Copyright (c) 2023 Robert Clausecker
 */

#include <sys/cdefs.h>

#include <string.h>

#undef strncat  /* _FORTIFY_SOURCE */

void *__memccpy(void *restrict, const void *restrict, int, size_t);

char *
strncat(char *dest, const char *src, size_t n)
{
        size_t len;
        char *endptr;

        len = strlen(dest);
        endptr = __memccpy(dest + len, src, '\0', n);

        /* avoid an extra branch */
        if (endptr == NULL)
                endptr = dest + len + n + 1;

        endptr[-1] = '\0';

        return (dest);
}