1 /*
2 * Copyright 2003,2004 Red Hat, Inc.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, and the entire permission notice in its entirety,
9 * including the disclaimer of warranties.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote
14 * products derived from this software without specific prior
15 * written permission.
16 *
17 * ALTERNATIVELY, this product may be distributed under the terms of the
18 * GNU Lesser General Public License, in which case the provisions of the
19 * LGPL are required INSTEAD OF the above restrictions.
20 *
21 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
24 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
27 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
28 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 */
32
33 #include "../config.h"
34
35 #include <stdlib.h>
36 #include <string.h>
37 #include "xstr.h"
38
39 int
xstrlen(const char * s)40 xstrlen(const char *s)
41 {
42 if (s != NULL) {
43 return strlen(s);
44 }
45 return 0;
46 }
47
48 void
xstrfree(char * s)49 xstrfree(char *s)
50 {
51 if (s != NULL) {
52 memset(s, '\0', strlen(s));
53 free(s);
54 }
55 }
56
57 char *
xstrdup(const char * s)58 xstrdup(const char *s)
59 {
60 char *ret;
61 int len;
62 len = xstrlen(s);
63 ret = malloc(len + 1);
64 if (ret != NULL) {
65 memset(ret, '\0', len + 1);
66 if (s != NULL) {
67 strcpy(ret, s);
68 }
69 }
70 return ret;
71 }
72
73 char *
xstrndup(const char * s,int n)74 xstrndup(const char *s, int n)
75 {
76 char *ret;
77 int len;
78 len = xstrlen(s);
79 ret = malloc(len + 1);
80 if (ret != NULL) {
81 memset(ret, '\0', len + 1);
82 if (s != NULL) {
83 if (n < len) {
84 memmove(ret, s, n);
85 } else {
86 memmove(ret, s, len);
87 }
88 }
89 }
90 return ret;
91 }
92