1 /*
2 +----------------------------------------------------------------------+
3 | PHP Version 7 |
4 +----------------------------------------------------------------------+
5 | Copyright (c) The PHP Group |
6 +----------------------------------------------------------------------+
7 | This source file is subject to version 3.01 of the PHP license, |
8 | that is bundled with this package in the file LICENSE, and is |
9 | available through the world-wide-web at the following url: |
10 | http://www.php.net/license/3_01.txt |
11 | If you did not receive a copy of the PHP license and are unable to |
12 | obtain it through the world-wide-web, please send a note to |
13 | license@php.net so we can mail you a copy immediately. |
14 +----------------------------------------------------------------------+
15 | Author: |
16 +----------------------------------------------------------------------+
17 */
18
19 #include "php.h"
20
21 #ifdef USE_STRLCAT_PHP_IMPL
22
23 /* $OpenBSD: strlcat.c,v 1.18 2016/10/16 17:37:39 dtucker Exp $ */
24
25 /*
26 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
27 * All rights reserved.
28 *
29 * Redistribution and use in source and binary forms, with or without
30 * modification, are permitted provided that the following conditions
31 * are met:
32 * 1. Redistributions of source code must retain the above copyright
33 * notice, this list of conditions and the following disclaimer.
34 * 2. Redistributions in binary form must reproduce the above copyright
35 * notice, this list of conditions and the following disclaimer in the
36 * documentation and/or other materials provided with the distribution.
37 * 3. The name of the author may not be used to endorse or promote products
38 * derived from this software without specific prior written permission.
39 *
40 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
41 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
42 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
43 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
44 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
45 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
46 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
47 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
48 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
49 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
50 */
51
52 #if defined(LIBC_SCCS) && !defined(lint)
53 static char *rcsid = "$OpenBSD: strlcat.c,v 1.17 2016/10/14 18:19:04 dtucker Exp $";
54 #endif /* LIBC_SCCS and not lint */
55
56 #include <sys/types.h>
57 #include <string.h>
58
59 /*
60 * Appends src to string dst of size siz (unlike strncat, siz is the
61 * full size of dst, not space left). At most siz-1 characters
62 * will be copied. Always NUL terminates (unless siz <= strlen(dst)).
63 * Returns strlen(src) + MIN(siz, strlen(initial dst).
64 * If retval >= siz, truncation occurred.
65 */
php_strlcat(dst,src,siz)66 PHPAPI size_t php_strlcat(dst, src, siz)
67 char *dst;
68 const char *src;
69 size_t siz;
70 {
71 const char *d = dst;
72 const char *s = src;
73 size_t n = siz;
74 size_t dlen;
75
76 /* Find the end of dst and adjust bytes left but don't go past end */
77 while (n-- != 0 && *dst != '\0')
78 dst++;
79 dlen = dst - d;
80 n = siz - dlen;
81
82 if (n-- == 0)
83 return(dlen + strlen(src));
84 while (*src != '\0') {
85 if (n != 0) {
86 *dst++ = *src;
87 n--;
88 }
89 src++;
90 }
91 *dst = '\0';
92
93 return(dlen + (src - s));
94 }
95
96 #endif /* !HAVE_STRLCAT */
97
