// SPDX-License-Identifier: CDDL-1.0
/*
 * This file and its contents are supplied under the terms of the
 * Common Development and Distribution License ("CDDL"), version 1.0.
 * You may only use this file in accordance with the terms of version
 * 1.0 of the CDDL.
 *
 * A full copy of the text of the CDDL should have accompanied this
 * source.  A copy of the CDDL is also available via the Internet at
 * https://opensource.org/license/CDDL-1.0.
 */

/*
 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */
#ifndef HAVE_STRLCAT

#include <string.h>
#include <sys/types.h>

/*
 * Appends src to the dstsize buffer at dst. The append will never
 * overflow the destination buffer and the buffer will always be null
 * terminated. Never reference beyond &dst[dstsize-1] when computing
 * the length of the pre-existing string.
 */

size_t
strlcat(char *dst, const char *src, size_t dstsize)
{
	char *df = dst;
	size_t left = dstsize;
	size_t l1;
	size_t l2 = strlen(src);
	size_t copied;

	while (left-- != 0 && *df != '\0')
		df++;
	l1 = df - dst;
	if (dstsize == l1)
		return (l1 + l2);

	copied = l1 + l2 >= dstsize ? dstsize - l1 - 1 : l2;
	(void) memcpy(dst + l1, src, copied);
	dst[l1+copied] = '\0';

	return (l1 + l2);
}

#endif