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/* Implementation of the CHDIR intrinsic.

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

   Contributed by François-Xavier Coudert <coudert@clipper.ens.fr>

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 <errno.h>

#include <string.h>

#ifdef HAVE_UNISTD_H

#include <unistd.h>

#endif

/* SUBROUTINE CHDIR(DIR, STATUS)

   CHARACTER(len=*), INTENT(IN) :: DIR

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

#ifdef HAVE_CHDIR

extern void chdir_i4_sub (char *, GFC_INTEGER_4 *, gfc_charlen_type);

iexport_proto(chdir_i4_sub);

void

chdir_i4_sub (char *dir, GFC_INTEGER_4 *status, gfc_charlen_type dir_len)

{

  int val;

  char *str;

  /* Trim trailing spaces from paths.  */

  while (dir_len > 0 && dir[dir_len - 1] == ' ')

    dir_len--;

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

  str = gfc_alloca (dir_len + 1);

  memcpy (str, dir, dir_len);

  str[dir_len] = '\0';

  val = chdir (str);

  if (status != NULL)

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

}

iexport(chdir_i4_sub);

extern void chdir_i8_sub (char *, GFC_INTEGER_8 *, gfc_charlen_type);

iexport_proto(chdir_i8_sub);

void

chdir_i8_sub (char *dir, GFC_INTEGER_8 *status, gfc_charlen_type dir_len)

{

  int val;

  char *str;

  /* Trim trailing spaces from paths.  */

  while (dir_len > 0 && dir[dir_len - 1] == ' ')

    dir_len--;

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

  str = gfc_alloca (dir_len + 1);

  memcpy (str, dir, dir_len);

  str[dir_len] = '\0';

  val = chdir (str);

  if (status != NULL)

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

}

iexport(chdir_i8_sub);

extern GFC_INTEGER_4 chdir_i4 (char *, gfc_charlen_type);

export_proto(chdir_i4);

GFC_INTEGER_4

chdir_i4 (char *dir, gfc_charlen_type dir_len)

{

  GFC_INTEGER_4 val;

  chdir_i4_sub (dir, &val, dir_len);

  return val;

}

extern GFC_INTEGER_8 chdir_i8 (char *, gfc_charlen_type);

export_proto(chdir_i8);

GFC_INTEGER_8

chdir_i8 (char *dir, gfc_charlen_type dir_len)

{

  GFC_INTEGER_8 val;

  chdir_i8_sub (dir, &val, dir_len);

  return val;

}

#endif