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 #include "php.h"
20
21 #ifdef USE_STRLCPY_PHP_IMPL
22
23 /* $OpenBSD: strlcpy.c,v 1.15 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: strlcpy.c,v 1.15 2016/10/16 17:37:39 dtucker Exp $";
54 #endif /* LIBC_SCCS and not lint */
55
56 #include <sys/types.h>
57 #include <string.h>
58
59 /*
60 * Copy src to string dst of size siz. At most siz-1 characters
61 * will be copied. Always NUL terminates (unless siz == 0).
62 * Returns strlen(src); if retval >= siz, truncation occurred.
63 */
php_strlcpy(dst,src,siz)64 PHPAPI size_t php_strlcpy(dst, src, siz)
65 char *dst;
66 const char *src;
67 size_t siz;
68 {
69 const char *s = src;
70 size_t n = siz;
71
72 /* Copy as many bytes as will fit */
73 if (n != 0) {
74 while (--n != 0) {
75 if ((*dst++ = *src++) == 0)
76 break;
77 }
78 }
79
80 /* Not enough room in dst, add NUL and traverse rest of src */
81 if (n == 0) {
82 if (siz != 0)
83 *dst = '\0'; /* NUL-terminate dst */
84 while (*src++)
85 ;
86 }
87
88 /*
89 * Cast pointers to unsigned type before calculation, to avoid signed
90 * overflow when the string ends where the MSB has changed.
91 * Return value does not include NUL.
92 */
93 return((uintptr_t)src - (uintptr_t)s - 1);
94 }
95
96 #endif /* !HAVE_STRLCPY */
97
98 /*
99 * Local variables:
100 * tab-width: 4
101 * c-basic-offset: 4
102 * End:
103 * vim600: sw=4 ts=4 fdm=marker
104 * vim<600: sw=4 ts=4
105 */
106
