1 /* Id */
2
3 /*
4 * Copyright (c) 2004 Nicholas Marriott <nicm@users.sourceforge.net>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #include <sys/param.h>
20
21 #include <errno.h>
22 #include <libgen.h>
23 #include <stdlib.h>
24 #include <string.h>
25
26 #include "tmux.h"
27
28 char *
xstrdup(const char * s)29 xstrdup(const char *s)
30 {
31 char *ptr;
32 size_t len;
33
34 len = strlen(s) + 1;
35 ptr = xmalloc(len);
36
37 strlcpy(ptr, s, len);
38 return (ptr);
39 }
40
41 void *
xcalloc(size_t nmemb,size_t size)42 xcalloc(size_t nmemb, size_t size)
43 {
44 void *ptr;
45
46 if (size == 0 || nmemb == 0)
47 fatalx("zero size");
48 if (SIZE_MAX / nmemb < size)
49 fatalx("nmemb * size > SIZE_MAX");
50 if ((ptr = calloc(nmemb, size)) == NULL)
51 fatal("xcalloc failed");
52
53 return (ptr);
54 }
55
56 void *
xmalloc(size_t size)57 xmalloc(size_t size)
58 {
59 void *ptr;
60
61 if (size == 0)
62 fatalx("zero size");
63 if ((ptr = malloc(size)) == NULL)
64 fatal("xmalloc failed");
65
66 return (ptr);
67 }
68
69 void *
xrealloc(void * oldptr,size_t nmemb,size_t size)70 xrealloc(void *oldptr, size_t nmemb, size_t size)
71 {
72 size_t newsize = nmemb * size;
73 void *newptr;
74
75 if (newsize == 0)
76 fatalx("zero size");
77 if (SIZE_MAX / nmemb < size)
78 fatalx("nmemb * size > SIZE_MAX");
79 if ((newptr = realloc(oldptr, newsize)) == NULL)
80 fatal("xrealloc failed");
81
82 return (newptr);
83 }
84
85 int printflike2
xasprintf(char ** ret,const char * fmt,...)86 xasprintf(char **ret, const char *fmt, ...)
87 {
88 va_list ap;
89 int i;
90
91 va_start(ap, fmt);
92 i = xvasprintf(ret, fmt, ap);
93 va_end(ap);
94
95 return (i);
96 }
97
98 int
xvasprintf(char ** ret,const char * fmt,va_list ap)99 xvasprintf(char **ret, const char *fmt, va_list ap)
100 {
101 int i;
102
103 i = vasprintf(ret, fmt, ap);
104 if (i < 0 || *ret == NULL)
105 fatal("xvasprintf failed");
106
107 return (i);
108 }
109
110 int printflike3
xsnprintf(char * buf,size_t len,const char * fmt,...)111 xsnprintf(char *buf, size_t len, const char *fmt, ...)
112 {
113 va_list ap;
114 int i;
115
116 va_start(ap, fmt);
117 i = xvsnprintf(buf, len, fmt, ap);
118 va_end(ap);
119
120 return (i);
121 }
122
123 int
xvsnprintf(char * buf,size_t len,const char * fmt,va_list ap)124 xvsnprintf(char *buf, size_t len, const char *fmt, va_list ap)
125 {
126 int i;
127
128 if (len > INT_MAX)
129 fatalx("len > INT_MAX");
130
131 i = vsnprintf(buf, len, fmt, ap);
132 if (i < 0)
133 fatal("vsnprintf failed");
134
135 return (i);
136 }
137