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/* Implementation of the UNLINK intrinsic.

   Copyright (C) 2004, 2005, 2007, 2009 Free Software Foundation, Inc.

   Contributed by Steven G. Kargl <kargls@comcast.net>.

This file is part of the GNU Fortran 95 runtime library (libgfortran).

Libgfortran 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 3 of the License, or (at your option) any later version.

Libgfortran 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.

Under Section 7 of GPL version 3, you are granted additional

permissions described in the GCC Runtime Library Exception, version

3.1, as published by the Free Software Foundation.

You should have received a copy of the GNU General Public License and

a copy of the GCC Runtime Library Exception along with this program;

see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see

<http://www.gnu.org/licenses/>.  */

#include "libgfortran.h"

#include <string.h>

#include <errno.h>

#ifdef HAVE_UNISTD_H

#include <unistd.h>

#endif

/* SUBROUTINE UNLINK(NAME, STATUS)

   CHARACTER(LEN= ), INTENT(IN) :: NAME

   INTEGER, INTENT(OUT), OPTIONAL :: STATUS)  */

extern void unlink_i4_sub (char *name, GFC_INTEGER_4 *status,

                           gfc_charlen_type name_len);

iexport_proto(unlink_i4_sub);

void

unlink_i4_sub (char *name, GFC_INTEGER_4 *status, gfc_charlen_type name_len)

{

  char *str;

  GFC_INTEGER_4 stat;

  /* Trim trailing spaces from name.  */

  while (name_len > 0 && name[name_len - 1] == ' ')

    name_len--;

  /* Make a null terminated copy of the string.  */

  str = gfc_alloca (name_len + 1);

  memcpy (str, name, name_len);

  str[name_len] = '\0';

  stat = unlink (str);

  if (status != NULL)

    *status = (stat == 0) ? stat : errno;

}

iexport(unlink_i4_sub);

extern void unlink_i8_sub (char *name, GFC_INTEGER_8 *status,

                           gfc_charlen_type name_len);

export_proto(unlink_i8_sub);

void

unlink_i8_sub (char *name, GFC_INTEGER_8 *status, gfc_charlen_type name_len)

{

  GFC_INTEGER_4 status4;

  unlink_i4_sub (name, &status4, name_len);

  if (status)

    *status = status4;

}

/* INTEGER FUNCTION UNLINK(NAME)

   CHARACTER(LEN= ), INTENT(IN) :: NAME  */

extern GFC_INTEGER_4 PREFIX(unlink) (char *, gfc_charlen_type);

export_proto_np(PREFIX(unlink));

GFC_INTEGER_4

PREFIX(unlink) (char *name, gfc_charlen_type name_len)

{

  GFC_INTEGER_4 status;

  unlink_i4_sub (name, &status, name_len);

  return status;

}