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 | http://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_STRLCPY_PHP_IMPL
20
21 /* $OpenBSD: strlcpy.c,v 1.15 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: strlcpy.c,v 1.15 2016/10/16 17:37:39 dtucker Exp $";
52 #endif /* LIBC_SCCS and not lint */
53
54 #include <sys/types.h>
55 #include <string.h>
56
57 /*
58 * Copy src to string dst of size siz. At most siz-1 characters
59 * will be copied. Always NUL terminates (unless siz == 0).
60 * Returns strlen(src); if retval >= siz, truncation occurred.
61 */
php_strlcpy(dst,src,siz)62 PHPAPI size_t php_strlcpy(dst, src, siz)
63 char *dst;
64 const char *src;
65 size_t siz;
66 {
67 const char *s = src;
68 size_t n = siz;
69
70 /* Copy as many bytes as will fit */
71 if (n != 0) {
72 while (--n != 0) {
73 if ((*dst++ = *src++) == 0)
74 break;
75 }
76 }
77
78 /* Not enough room in dst, add NUL and traverse rest of src */
79 if (n == 0) {
80 if (siz != 0)
81 *dst = '\0'; /* NUL-terminate dst */
82 while (*src++)
83 ;
84 }
85
86 /*
87 * Cast pointers to unsigned type before calculation, to avoid signed
88 * overflow when the string ends where the MSB has changed.
89 * Return value does not include NUL.
90 */
91 return((uintptr_t)src - (uintptr_t)s - 1);
92 }
93
94 #endif /* !HAVE_STRLCPY */
95
