1 /*
2 +----------------------------------------------------------------------+
3 | Copyright (c) The PHP Group |
4 +----------------------------------------------------------------------+
5 | This source file is subject to version 3.01 of the PHP license, |
6 | that is bundled with this package in the file LICENSE, and is |
7 | available through the world-wide-web at the following url: |
8 | https://www.php.net/license/3_01.txt |
9 | If you did not receive a copy of the PHP license and are unable to |
10 | obtain it through the world-wide-web, please send a note to |
11 | license@php.net so we can mail you a copy immediately. |
12 +----------------------------------------------------------------------+
13 | Author: |
14 +----------------------------------------------------------------------+
15 */
16
17 #include "php.h"
18
19 #ifdef USE_STRLCAT_PHP_IMPL
20
21 /* $OpenBSD: strlcat.c,v 1.18 2016/10/16 17:37:39 dtucker Exp $ */
22
23 /*
24 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
25 * All rights reserved.
26 *
27 * Redistribution and use in source and binary forms, with or without
28 * modification, are permitted provided that the following conditions
29 * are met:
30 * 1. Redistributions of source code must retain the above copyright
31 * notice, this list of conditions and the following disclaimer.
32 * 2. Redistributions in binary form must reproduce the above copyright
33 * notice, this list of conditions and the following disclaimer in the
34 * documentation and/or other materials provided with the distribution.
35 * 3. The name of the author may not be used to endorse or promote products
36 * derived from this software without specific prior written permission.
37 *
38 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
39 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
40 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
41 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
42 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
43 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
44 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
45 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
46 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
47 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
48 */
49
50 #if defined(LIBC_SCCS) && !defined(lint)
51 static const char *rcsid = "$OpenBSD: strlcat.c,v 1.17 2016/10/14 18:19:04 dtucker Exp $";
52 #endif /* LIBC_SCCS and not lint */
53
54 #include <sys/types.h>
55 #include <string.h>
56
57 /*
58 * Appends src to string dst of size siz (unlike strncat, siz is the
59 * full size of dst, not space left). At most siz-1 characters
60 * will be copied. Always NUL terminates (unless siz <= strlen(dst)).
61 * Returns strlen(src) + MIN(siz, strlen(initial dst).
62 * If retval >= siz, truncation occurred.
63 */
php_strlcat(char * dst,const char * src,size_t siz)64 PHPAPI size_t php_strlcat(char *dst, const char *src, size_t siz)
65 {
66 const char *d = dst;
67 const char *s = src;
68 size_t n = siz;
69 size_t dlen;
70
71 /* Find the end of dst and adjust bytes left but don't go past end */
72 while (n-- != 0 && *dst != '\0')
73 dst++;
74 dlen = dst - d;
75 n = siz - dlen;
76
77 if (n-- == 0)
78 return(dlen + strlen(src));
79 while (*src != '\0') {
80 if (n != 0) {
81 *dst++ = *src;
82 n--;
83 }
84 src++;
85 }
86 *dst = '\0';
87
88 return(dlen + (src - s));
89 }
90
91 #endif /* !HAVE_STRLCAT */
92
