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/* memory allocation routines with error checking.

   Copyright 1989, 90, 91, 92, 93, 94 Free Software Foundation, Inc.

This file is part of the libiberty library.

Libiberty is free software; you can redistribute it and/or

modify it under the terms of the GNU Library General Public

License as published by the Free Software Foundation; either

version 2 of the License, or (at your option) any later version.

Libiberty 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

Library General Public License for more details.

You should have received a copy of the GNU Library General Public

License along with libiberty; see the file COPYING.LIB.  If

not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,

Boston, MA 02111-1307, USA.  */

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#include "ansidecl.h"

#include "libiberty.h"

#include <stdio.h>

#ifdef __STDC__

#include <stddef.h>

#else

#define size_t unsigned long

#define ptrdiff_t long

#endif

#if VMS

#include <stdlib.h>

#include <unixlib.h>

#else

/* For systems with larger pointers than ints, these must be declared.  */

PTR malloc PARAMS ((size_t));

PTR realloc PARAMS ((PTR, size_t));

PTR calloc PARAMS ((size_t, size_t));

PTR sbrk PARAMS ((ptrdiff_t));

#endif

/* The program name if set.  */

static const char *name = "";

#ifdef HAVE_SBRK

/* The initial sbrk, set when the program name is set. Not used for win32

   ports other than cygwin32.  */

static char *first_break = NULL;

#endif /* HAVE_SBRK */

void

xmalloc_set_program_name (s)

     const char *s;

{

  name = s;

#ifdef HAVE_SBRK

  /* Win32 ports other than cygwin32 don't have brk() */

  if (first_break == NULL)

    first_break = (char *) sbrk (0);

#endif /* HAVE_SBRK */

}

void

xmalloc_failed (size)

     size_t size;

{

#ifdef HAVE_SBRK

  extern char **environ;

  size_t allocated;

  if (first_break != NULL)

    allocated = (char *) sbrk (0) - first_break;

  else

    allocated = (char *) sbrk (0) - (char *) &environ;

  fprintf (stderr,

           "\n%s%sCannot allocate %lu bytes after allocating %lu bytes\n",

           name, *name ? ": " : "",

           (unsigned long) size, (unsigned long) allocated);

#else /* HAVE_SBRK */

  fprintf (stderr,

           "\n%s%sCannot allocate %lu bytes\n",

           name, *name ? ": " : "",

           (unsigned long) size);

#endif /* HAVE_SBRK */

  xexit (1);

}

PTR

xmalloc (size)

    size_t size;

{

  PTR newmem;

  if (size == 0)

    size = 1;

  newmem = malloc (size);

  if (!newmem)

    xmalloc_failed (size);

  return (newmem);

}

PTR

xcalloc (nelem, elsize)

  size_t nelem, elsize;

{

  PTR newmem;

  if (nelem == 0 || elsize == 0)

    nelem = elsize = 1;

  newmem = calloc (nelem, elsize);

  if (!newmem)

    xmalloc_failed (nelem * elsize);

  return (newmem);

}

PTR

xrealloc (oldmem, size)

    PTR oldmem;

    size_t size;

{

  PTR newmem;

  if (size == 0)

    size = 1;

  if (!oldmem)

    newmem = malloc (size);

  else

    newmem = realloc (oldmem, size);

  if (!newmem)

    xmalloc_failed (size);

  return (newmem);

}