readline/xmalloc.c

   1 /* xmalloc.c -- safe versions of malloc and realloc */
   2
   3 /* Copyright (C) 1991-2009 Free Software Foundation, Inc.
   4
   5    This file is part of the GNU Readline Library (Readline), a library
   6    for reading lines of text with interactive input and history editing.
   7
   8    Readline is free software: you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation, either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    Readline is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with Readline.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #define READLINE_LIBRARY
  23
  24 #if defined (HAVE_CONFIG_H)
  25 #include <config.h>
  26 #endif
  27
  28 #include <stdio.h>
  29
  30 #if defined (HAVE_STDLIB_H)
  31 #  include <stdlib.h>
  32 #else
  33 #  include "ansi_stdlib.h"
  34 #endif /* HAVE_STDLIB_H */
  35
  36 #include "xmalloc.h"
  37
  38 /* **************************************************************** */
  39 /*                                                                  */
  40 /*                 Memory Allocation and Deallocation.              */
  41 /*                                                                  */
  42 /* **************************************************************** */
  43
  44 static void
  45 memory_error_and_abort (fname)
  46      char *fname;
  47 {
  48   fprintf (stderr, "%s: out of virtual memory\n", fname);
  49   exit (2);
  50 }
  51
  52 /* Return a pointer to free()able block of memory large enough
  53    to hold BYTES number of bytes.  If the memory cannot be allocated,
  54    print an error message and abort. */
  55 PTR_T
  56 xmalloc (bytes)
  57      size_t bytes;
  58 {
  59   PTR_T temp;
  60
  61   temp = malloc (bytes);
  62   if (temp == 0)
  63     memory_error_and_abort ("xmalloc");
  64   return (temp);
  65 }
  66
  67 PTR_T
  68 xrealloc (pointer, bytes)
  69      PTR_T pointer;
  70      size_t bytes;
  71 {
  72   PTR_T temp;
  73
  74   temp = pointer ? realloc (pointer, bytes) : malloc (bytes);
  75
  76   if (temp == 0)
  77     memory_error_and_abort ("xrealloc");
  78   return (temp);
  79 }