Merge branch 'obsd-master'
[tmux.git] / xmalloc.c
blobd11d8dc78da913acecfdd884f02ddfd72e299081
1 /* $OpenBSD$ */
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).
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".
17 #include <errno.h>
18 #include <limits.h>
19 #include <stdint.h>
20 #include <stdio.h>
21 #include <stdlib.h>
22 #include <string.h>
24 #include "tmux.h"
26 void *
27 xmalloc(size_t size)
29 void *ptr;
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;
40 void *
41 xcalloc(size_t nmemb, size_t size)
43 void *ptr;
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;
54 void *
55 xrealloc(void *ptr, size_t size)
57 return xreallocarray(ptr, 1, size);
60 void *
61 xreallocarray(void *ptr, size_t nmemb, size_t size)
63 void *new_ptr;
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;
74 void *
75 xrecallocarray(void *ptr, size_t oldnmemb, size_t nmemb, size_t size)
77 void *new_ptr;
79 if (nmemb == 0 || size == 0)
80 fatalx("xrecallocarray: zero size");
81 new_ptr = recallocarray(ptr, oldnmemb, nmemb, size);
82 if (new_ptr == NULL)
83 fatalx("xrecallocarray: allocating %zu * %zu bytes: %s",
84 nmemb, size, strerror(errno));
85 return new_ptr;
88 char *
89 xstrdup(const char *str)
91 char *cp;
93 if ((cp = strdup(str)) == NULL)
94 fatalx("xstrdup: %s", strerror(errno));
95 return cp;
98 char *
99 xstrndup(const char *str, size_t maxlen)
101 char *cp;
103 if ((cp = strndup(str, maxlen)) == NULL)
104 fatalx("xstrndup: %s", strerror(errno));
105 return cp;
109 xasprintf(char **ret, const char *fmt, ...)
111 va_list ap;
112 int i;
114 va_start(ap, fmt);
115 i = xvasprintf(ret, fmt, ap);
116 va_end(ap);
118 return i;
122 xvasprintf(char **ret, const char *fmt, va_list ap)
124 int i;
126 i = vasprintf(ret, fmt, ap);
128 if (i == -1)
129 fatalx("xasprintf: %s", strerror(errno));
131 return i;
135 xsnprintf(char *str, size_t len, const char *fmt, ...)
137 va_list ap;
138 int i;
140 va_start(ap, fmt);
141 i = xvsnprintf(str, len, fmt, ap);
142 va_end(ap);
144 return i;
148 xvsnprintf(char *str, size_t len, const char *fmt, va_list ap)
150 int i;
152 if (len > INT_MAX)
153 fatalx("xsnprintf: len > INT_MAX");
155 i = vsnprintf(str, len, fmt, ap);
157 if (i < 0 || i >= (int)len)
158 fatalx("xsnprintf: overflow");
160 return i;