xmalloc.c

   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 *
  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 *
  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 *
  55 xrealloc(void *ptr, size_t size)
  56 {
  57         return xreallocarray(ptr, 1, size);
  58 }
  59
  60 void *
  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 void *
  75 xrecallocarray(void *ptr, size_t oldnmemb, size_t nmemb, size_t size)
  76 {
  77         void *new_ptr;
  78
  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;
  86 }
  87
  88 char *
  89 xstrdup(const char *str)
  90 {
  91         char *cp;
  92
  93         if ((cp = strdup(str)) == NULL)
  94                 fatalx("xstrdup: %s", strerror(errno));
  95         return cp;
  96 }
  97
  98 char *
  99 xstrndup(const char *str, size_t maxlen)
 100 {
 101         char *cp;
 102
 103         if ((cp = strndup(str, maxlen)) == NULL)
 104                 fatalx("xstrndup: %s", strerror(errno));
 105         return cp;
 106 }
 107
 108 int
 109 xasprintf(char **ret, const char *fmt, ...)
 110 {
 111         va_list ap;
 112         int i;
 113
 114         va_start(ap, fmt);
 115         i = xvasprintf(ret, fmt, ap);
 116         va_end(ap);
 117
 118         return i;
 119 }
 120
 121 int
 122 xvasprintf(char **ret, const char *fmt, va_list ap)
 123 {
 124         int i;
 125
 126         i = vasprintf(ret, fmt, ap);
 127
 128         if (i == -1)
 129                 fatalx("xasprintf: %s", strerror(errno));
 130
 131         return i;
 132 }
 133
 134 int
 135 xsnprintf(char *str, size_t len, const char *fmt, ...)
 136 {
 137         va_list ap;
 138         int i;
 139
 140         va_start(ap, fmt);
 141         i = xvsnprintf(str, len, fmt, ap);
 142         va_end(ap);
 143
 144         return i;
 145 }
 146
 147 int
 148 xvsnprintf(char *str, size_t len, const char *fmt, va_list ap)
 149 {
 150         int i;
 151
 152         if (len > INT_MAX)
 153                 fatalx("xsnprintf: len > INT_MAX");
 154
 155         i = vsnprintf(str, len, fmt, ap);
 156
 157         if (i < 0 || i >= (int)len)
 158                 fatalx("xsnprintf: overflow");
 159
 160         return i;
 161 }