xmalloc.c 2.2 KB
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/* xmalloc.c -- safe versions of malloc and realloc */

/* Copyright (C) 1991 Free Software Foundation, Inc.

   This file is part of GNU Readline, a library for reading lines
   of text with interactive input and history editing.

   Readline is free software; you can redistribute it and/or modify it
   under the terms of the GNU General Public License as published by the
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   Free Software Foundation; either version 2, or (at your option) any
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   later version.

   Readline is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with Readline; see the file COPYING.  If not, write to the Free
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   Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
#define READLINE_LIBRARY
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#include "config_readline.h"
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#include <stdio.h>

#if defined (HAVE_STDLIB_H)
#  include <stdlib.h>
#else
#  include "ansi_stdlib.h"
#endif /* HAVE_STDLIB_H */

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#include "xmalloc.h"
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/* **************************************************************** */
/*								    */
/*		   Memory Allocation and Deallocation.		    */
/*								    */
/* **************************************************************** */

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static void
memory_error_and_abort (fname)
     char *fname;
{
  fprintf (stderr, "%s: out of virtual memory\n", fname);
  exit (2);
}

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/* Return a pointer to free()able block of memory large enough
   to hold BYTES number of bytes.  If the memory cannot be allocated,
   print an error message and abort. */
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PTR_T
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xmalloc (bytes)
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     size_t bytes;
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{
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  PTR_T temp;
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  temp = malloc (bytes);
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  if (temp == 0)
    memory_error_and_abort ("xmalloc");
  return (temp);
}

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PTR_T
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xrealloc (pointer, bytes)
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     PTR_T pointer;
     size_t bytes;
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{
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  PTR_T temp;
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  temp = pointer ? realloc (pointer, bytes) : malloc (bytes);
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  if (temp == 0)
    memory_error_and_abort ("xrealloc");
  return (temp);
}

/* Use this as the function to call when adding unwind protects so we
   don't need to know what free() returns. */
void
xfree (string)
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     PTR_T string;
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{
  if (string)
    free (string);
}