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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

   Free Software Foundation; either version 1, or (at your option) any

   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

   Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */

#if defined (HAVE_CONFIG_H)

#include <config.h>

#endif

#include <stdio.h>

#if defined (HAVE_STDLIB_H)

#  include <stdlib.h>

#else

#  include "ansi_stdlib.h"

#endif /* HAVE_STDLIB_H */

static void memory_error_and_abort ();

/* **************************************************************** */

/*                                                                  */

/*                 Memory Allocation and Deallocation.              */

/*                                                                  */

/* **************************************************************** */

/* 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. */

char *

xmalloc (bytes)

     int bytes;

{

  char *temp;

  temp = (char *)malloc (bytes);

  if (temp == 0)

    memory_error_and_abort ("xmalloc");

  return (temp);

}

char *

xrealloc (pointer, bytes)

     char *pointer;

     int bytes;

{

  char *temp;

  temp = pointer ? (char *)realloc (pointer, bytes) : (char *)malloc (bytes);

  if (temp == 0)

    memory_error_and_abort ("xrealloc");

  return (temp);

}

static void

memory_error_and_abort (fname)

     char *fname;

{

  fprintf (stderr, "%s: out of virtual memory\n", fname);

  exit (2);

}

/* Use this as the function to call when adding unwind protects so we

   don't need to know what free() returns. */

void

xfree (string)

     char *string;

{

  if (string)

    free (string);

}