1 /* $OpenBSD$ */
2
3 /*
4 * Author: Tatu Ylonen <ylo@cs.hut.fi>
5 * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
6 * All rights reserved
7 * Versions of malloc and friends that check their results, and never return
8 * failure (they call fatalx if they encounter an error).
9 *
10 * As far as I am concerned, the code I have written for this software
11 * can be used freely for any purpose. Any derived versions of this
12 * software must be clearly marked as such, and if the derived work is
13 * incompatible with the protocol description in the RFC file, it must be
14 * called by a name other than "ssh" or "Secure Shell".
15 */
16
17 #include <errno.h>
18 #include <limits.h>
19 #include <stdint.h>
20 #include <stdio.h>
21 #include <stdlib.h>
22 #include <string.h>
23
24 #include "tmux.h"
25
26 void *
xmalloc(size_t size)27 xmalloc(size_t size)
28 {
29 void *ptr;
30
31 if (size == 0)
32 fatalx("xmalloc: zero size");
33 ptr = malloc(size);
34 if (ptr == NULL)
35 fatalx("xmalloc: allocating %zu bytes: %s",
36 size, strerror(errno));
37 return ptr;
38 }
39
40 void *
xcalloc(size_t nmemb,size_t size)41 xcalloc(size_t nmemb, size_t size)
42 {
43 void *ptr;
44
45 if (size == 0 || nmemb == 0)
46 fatalx("xcalloc: zero size");
47 ptr = calloc(nmemb, size);
48 if (ptr == NULL)
49 fatalx("xcalloc: allocating %zu * %zu bytes: %s",
50 nmemb, size, strerror(errno));
51 return ptr;
52 }
53
54 void *
xrealloc(void * ptr,size_t size)55 xrealloc(void *ptr, size_t size)
56 {
57 return xreallocarray(ptr, 1, size);
58 }
59
60 void *
xreallocarray(void * ptr,size_t nmemb,size_t size)61 xreallocarray(void *ptr, size_t nmemb, size_t size)
62 {
63 void *new_ptr;
64
65 if (nmemb == 0 || size == 0)
66 fatalx("xreallocarray: zero size");
67 new_ptr = reallocarray(ptr, nmemb, size);
68 if (new_ptr == NULL)
69 fatalx("xreallocarray: allocating %zu * %zu bytes: %s",
70 nmemb, size, strerror(errno));
71 return new_ptr;
72 }
73
74 char *
xstrdup(const char * str)75 xstrdup(const char *str)
76 {
77 char *cp;
78
79 if ((cp = strdup(str)) == NULL)
80 fatalx("xstrdup: %s", strerror(errno));
81 return cp;
82 }
83
84 int
xasprintf(char ** ret,const char * fmt,...)85 xasprintf(char **ret, const char *fmt, ...)
86 {
87 va_list ap;
88 int i;
89
90 va_start(ap, fmt);
91 i = xvasprintf(ret, fmt, ap);
92 va_end(ap);
93
94 return i;
95 }
96
97 int
xvasprintf(char ** ret,const char * fmt,va_list ap)98 xvasprintf(char **ret, const char *fmt, va_list ap)
99 {
100 int i;
101
102 i = vasprintf(ret, fmt, ap);
103
104 if (i < 0 || *ret == NULL)
105 fatalx("xasprintf: %s", strerror(errno));
106
107 return i;
108 }
109
110 int
xsnprintf(char * str,size_t len,const char * fmt,...)111 xsnprintf(char *str, size_t len, const char *fmt, ...)
112 {
113 va_list ap;
114 int i;
115
116 va_start(ap, fmt);
117 i = xvsnprintf(str, len, fmt, ap);
118 va_end(ap);
119
120 return i;
121 }
122
123 int
xvsnprintf(char * str,size_t len,const char * fmt,va_list ap)124 xvsnprintf(char *str, size_t len, const char *fmt, va_list ap)
125 {
126 int i;
127
128 if (len > INT_MAX)
129 fatalx("xsnprintf: len > INT_MAX");
130
131 i = vsnprintf(str, len, fmt, ap);
132
133 if (i < 0 || i >= (int)len)
134 fatalx("xsnprintf: overflow");
135
136 return i;
137 }
138