lib/xmalloc.c

   1 /* xmalloc.c -- malloc with out of memory checking
   2    Copyright (C) 1990, 91, 92, 93, 94, 95, 96, 97 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2, or (at your option)
   7    any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software Foundation,
  16    Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  17
  18 #if HAVE_CONFIG_H
  19 # include <config.h>
  20 #endif
  21
  22 #include <sys/types.h>
  23
  24 #if STDC_HEADERS
  25 # include <stdlib.h>
  26 #else
  27 void *calloc ();
  28 void *malloc ();
  29 void *realloc ();
  30 void free ();
  31 #endif
  32
  33 #if ENABLE_NLS
  34 # include <libintl.h>
  35 # define _(Text) gettext (Text)
  36 #else
  37 # define textdomain(Domain)
  38 # define _(Text) Text
  39 #endif
  40 #define N_(Text) Text
  41
  42 #include "error.h"
  43 #include "xalloc.h"
  44
  45 #ifndef EXIT_FAILURE
  46 # define EXIT_FAILURE 1
  47 #endif
  48
  49 /* Prototypes for functions defined here.  */
  50 #if defined (__STDC__) && __STDC__
  51 void *xmalloc (size_t n);
  52 void *xcalloc (size_t n, size_t s);
  53 void *xrealloc (void *p, size_t n);
  54 #endif
  55
  56 #ifndef HAVE_DONE_WORKING_MALLOC_CHECK
  57 you must run the autoconf test for a properly working malloc -- see malloc.m4
  58 #endif
  59
  60 #ifndef HAVE_DONE_WORKING_REALLOC_CHECK
  61 you must run the autoconf test for a properly working realloc -- see realloc.m4
  62 #endif
  63
  64 /* Exit value when the requested amount of memory is not available.
  65    The caller may set it to some other value.  */
  66 int xalloc_exit_failure = EXIT_FAILURE;
  67
  68 /* FIXME: describe */
  69 char *const xalloc_msg_memory_exhausted = N_("Memory exhausted");
  70
  71 /* FIXME: describe */
  72 void (*xalloc_fail_func) () = 0;
  73
  74 #if __STDC__ && (HAVE_VPRINTF || HAVE_DOPRNT)
  75 void error (int, int, const char *, ...);
  76 #else
  77 void error ();
  78 #endif
  79
  80 static void
  81 xalloc_fail ()
  82 {
  83   if (xalloc_fail_func)
  84     (*xalloc_fail_func) ();
  85   error (xalloc_exit_failure, 0, xalloc_msg_memory_exhausted);
  86 }
  87
  88 /* Allocate N bytes of memory dynamically, with error checking.  */
  89
  90 void *
  91 xmalloc (n)
  92      size_t n;
  93 {
  94   void *p;
  95
  96   p = malloc (n);
  97   if (p == 0)
  98     xalloc_fail ();
  99   return p;
 100 }
 101
 102 /* Change the size of an allocated block of memory P to N bytes,
 103    with error checking.
 104    If P is NULL, run xmalloc.  */
 105
 106 void *
 107 xrealloc (p, n)
 108      void *p;
 109      size_t n;
 110 {
 111   p = realloc (p, n);
 112   if (p == 0)
 113     xalloc_fail ();
 114   return p;
 115 }
 116
 117 #ifdef NOT_USED
 118
 119 /* Allocate memory for N elements of S bytes, with error checking.  */
 120
 121 void *
 122 xcalloc (n, s)
 123      size_t n, s;
 124 {
 125   void *p;
 126
 127   p = calloc (n, s);
 128   if (p == 0)
 129     xalloc_fail ();
 130   return p;
 131 }
 132
 133 #endif /* NOT_USED */