libc/string/wcslcat.c

/*
 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *      from OpenBSD: strlcat.c,v 1.3 2000/11/24 11:10:02 itojun Exp
 */

#include <sys/cdefs.h>
#if 0
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: wcslcat.c,v 1.1 2000/12/23 23:14:36 itojun Exp $");
#endif /* LIBC_SCCS and not lint */
#endif
__FBSDID("$FreeBSD$");

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

/*
 * Appends src to string dst of size siz (unlike wcsncat, siz is the
 * full size of dst, not space left).  At most siz-1 characters
 * will be copied.  Always NUL terminates (unless siz == 0).
 * Returns wcslen(initial dst) + wcslen(src); if retval >= siz,
 * truncation occurred.
 */
size_t
wcslcat(wchar_t *dst, const wchar_t *src, size_t siz)
{
        wchar_t *d = dst;
        const wchar_t *s = src;
        size_t n = siz;
        size_t dlen;

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

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

        return(dlen + (s - src));       /* count does not include NUL */
}
1	/*
2	* Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
3	* All rights reserved.
4	*
5	* Redistribution and use in source and binary forms, with or without
6	* modification, are permitted provided that the following conditions
7	* are met:
8	* 1. Redistributions of source code must retain the above copyright
9	* notice, this list of conditions and the following disclaimer.
10	* 2. Redistributions in binary form must reproduce the above copyright
11	* notice, this list of conditions and the following disclaimer in the
12	* documentation and/or other materials provided with the distribution.
13	* 3. The name of the author may not be used to endorse or promote products
14	* derived from this software without specific prior written permission.
15	*
16	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
17	* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
18	* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
19	* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24	* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25	* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26	*
27	* from OpenBSD: strlcat.c,v 1.3 2000/11/24 11:10:02 itojun Exp
28	*/
29
30	#include <sys/cdefs.h>
31	#if 0
32	#if defined(LIBC_SCCS) && !defined(lint)
33	__RCSID("$NetBSD: wcslcat.c,v 1.1 2000/12/23 23:14:36 itojun Exp $");
34	#endif /* LIBC_SCCS and not lint */
35	#endif
36	__FBSDID("$FreeBSD$");
37
38	#include <sys/types.h>
39	#include <wchar.h>
40
41	/*
42	* Appends src to string dst of size siz (unlike wcsncat, siz is the
43	* full size of dst, not space left). At most siz-1 characters
44	* will be copied. Always NUL terminates (unless siz == 0).
45	* Returns wcslen(initial dst) + wcslen(src); if retval >= siz,
46	* truncation occurred.
47	*/
48	size_t
49	wcslcat(wchar_t dst, const wchar_t src, size_t siz)
50	{
51	wchar_t *d = dst;
52	const wchar_t *s = src;
53	size_t n = siz;
54	size_t dlen;
55
56	/* Find the end of dst and adjust bytes left but don't go past end */
57	while (*d != '\0' && n-- != 0)
58	d++;
59	dlen = d - dst;
60	n = siz - dlen;
61
62	if (n == 0)
63	return(dlen + wcslen(s));
64	while (*s != '\0') {
65	if (n != 1) {
66	d++ = s;
67	n--;
68	}
69	s++;
70	}
71	*d = '\0';
72
73	return(dlen + (s - src)); /* count does not include NUL */
74	}