[gssapi-openssh.git] / openssh / openbsd-compat / strlcat.c

/* OPENBSD ORIGINAL: lib/libc/string/strlcat.c */

/*	$OpenBSD: strlcat.c,v 1.11 2003/06/17 21:56:24 millert Exp $	*/

/*
 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include "includes.h"
#ifndef HAVE_STRLCAT

#if defined(LIBC_SCCS) && !defined(lint)
static char *rcsid = "$OpenBSD: strlcat.c,v 1.11 2003/06/17 21:56:24 millert Exp $";
#endif /* LIBC_SCCS and not lint */

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

/*
 * Appends src to string dst of size siz (unlike strncat, siz is the
 * full size of dst, not space left).  At most siz-1 characters
 * will be copied.  Always NUL terminates (unless siz <= strlen(dst)).
 * Returns strlen(src) + MIN(siz, strlen(initial dst)).
 * If retval >= siz, truncation occurred.
 */
size_t
strlcat(char *dst, const char *src, size_t siz)
{
	register char *d = dst;
	register const char *s = src;
	register size_t n = siz;
	size_t dlen;

	/* Find the end of dst and adjust bytes left but don't go past end */
	while (n-- != 0 && *d != '\0')
		d++;
	dlen = d - dst;
	n = siz - dlen;

	if (n == 0)
		return(dlen + strlen(s));
	while (*s != '\0') {
		if (n != 1) {
			*d++ = *s;
			n--;
		}
		s++;
	}
	*d = '\0';

	return(dlen + (s - src));	/* count does not include NUL */
}

#endif /* !HAVE_STRLCAT */
Commit	Line	Data
cdd66111	1	/* OPENBSD ORIGINAL: lib/libc/string/strlcat.c */
cdd66111	2
0fff78ff	3	/* $OpenBSD: strlcat.c,v 1.11 2003/06/17 21:56:24 millert Exp $ */
3c0ef626	4
	5	/*
	6	* Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
3c0ef626	7	*
0fff78ff	8	* Permission to use, copy, modify, and distribute this software for any
	9	* purpose with or without fee is hereby granted, provided that the above
	10	* copyright notice and this permission notice appear in all copies.
3c0ef626	11	*
0fff78ff	12	* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
	13	* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
	14	* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
	15	* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
	16	* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
	17	* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
	18	* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
3c0ef626	19	*/
3c0ef626	20
41b2f314	21	#include "includes.h"
3c0ef626	22	#ifndef HAVE_STRLCAT
	23
	24	#if defined(LIBC_SCCS) && !defined(lint)
0fff78ff	25	static char *rcsid = "$OpenBSD: strlcat.c,v 1.11 2003/06/17 21:56:24 millert Exp $";
3c0ef626	26	#endif /* LIBC_SCCS and not lint */
	27
	28	#include <sys/types.h>
	29	#include <string.h>
3c0ef626	30
	31	/*
	32	* Appends src to string dst of size siz (unlike strncat, siz is the
	33	* full size of dst, not space left). At most siz-1 characters
	34	* will be copied. Always NUL terminates (unless siz <= strlen(dst)).
	35	* Returns strlen(src) + MIN(siz, strlen(initial dst)).
	36	* If retval >= siz, truncation occurred.
	37	*/
	38	size_t
0fff78ff	39	strlcat(char dst, const char src, size_t siz)
3c0ef626	40	{
	41	register char *d = dst;
	42	register const char *s = src;
	43	register size_t n = siz;
	44	size_t dlen;
	45
	46	/* Find the end of dst and adjust bytes left but don't go past end */
	47	while (n-- != 0 && *d != '\0')
	48	d++;
	49	dlen = d - dst;
	50	n = siz - dlen;
	51
	52	if (n == 0)
	53	return(dlen + strlen(s));
	54	while (*s != '\0') {
	55	if (n != 1) {
	56	d++ = s;
	57	n--;
	58	}
	59	s++;
	60	}
	61	*d = '\0';
	62
	63	return(dlen + (s - src)); /* count does not include NUL */
	64	}
	65
	66	#endif /* !HAVE_STRLCAT */