1 /*
2 +----------------------------------------------------------------------+
3 | PHP Version 7 |
4 +----------------------------------------------------------------------+
5 | Copyright (c) 1997-2018 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 /* $Id$ */
20
21 #include "php.h"
22
23 #ifdef USE_STRLCPY_PHP_IMPL
24
25 /* $OpenBSD: strlcpy.c,v 1.15 2016/10/16 17:37:39 dtucker Exp $ */
26
27 /*
28 * Copyright (c) 1998 Todd C. Miller <Todd.Miller@courtesan.com>
29 * All rights reserved.
30 *
31 * Redistribution and use in source and binary forms, with or without
32 * modification, are permitted provided that the following conditions
33 * are met:
34 * 1. Redistributions of source code must retain the above copyright
35 * notice, this list of conditions and the following disclaimer.
36 * 2. Redistributions in binary form must reproduce the above copyright
37 * notice, this list of conditions and the following disclaimer in the
38 * documentation and/or other materials provided with the distribution.
39 * 3. The name of the author may not be used to endorse or promote products
40 * derived from this software without specific prior written permission.
41 *
42 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
43 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
44 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
45 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
46 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
47 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
48 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
49 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
50 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
51 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
52 */
53
54 #if defined(LIBC_SCCS) && !defined(lint)
55 static char *rcsid = "$OpenBSD: strlcpy.c,v 1.15 2016/10/16 17:37:39 dtucker Exp $";
56 #endif /* LIBC_SCCS and not lint */
57
58 #include <sys/types.h>
59 #include <string.h>
60
61 /*
62 * Copy src to string dst of size siz. At most siz-1 characters
63 * will be copied. Always NUL terminates (unless siz == 0).
64 * Returns strlen(src); if retval >= siz, truncation occurred.
65 */
php_strlcpy(dst,src,siz)66 PHPAPI size_t php_strlcpy(dst, src, siz)
67 char *dst;
68 const char *src;
69 size_t siz;
70 {
71 const char *s = src;
72 size_t n = siz;
73
74 /* Copy as many bytes as will fit */
75 if (n != 0) {
76 while (--n != 0) {
77 if ((*dst++ = *src++) == 0)
78 break;
79 }
80 }
81
82 /* Not enough room in dst, add NUL and traverse rest of src */
83 if (n == 0) {
84 if (siz != 0)
85 *dst = '\0'; /* NUL-terminate dst */
86 while (*src++)
87 ;
88 }
89
90 /*
91 * Cast pointers to unsigned type before calculation, to avoid signed
92 * overflow when the string ends where the MSB has changed.
93 * Return value does not include NUL.
94 */
95 return((uintptr_t)src - (uintptr_t)s - 1);
96 }
97
98 #endif /* !HAVE_STRLCPY */
99
100 /*
101 * Local variables:
102 * tab-width: 4
103 * c-basic-offset: 4
104 * End:
105 * vim600: sw=4 ts=4 fdm=marker
106 * vim<600: sw=4 ts=4
107 */
108
