libgfortran/intrinsics/chdir.c

   1 /* Implementation of the CHDIR intrinsic.
   2    Copyright (C) 2005, 2007, 2009 Free Software Foundation, Inc.
   3    Contributed by François-Xavier Coudert <coudert@clipper.ens.fr>
   4
   5 This file is part of the GNU Fortran 95 runtime library (libgfortran).
   6
   7 Libgfortran is free software; you can redistribute it and/or
   8 modify it under the terms of the GNU General Public
   9 License as published by the Free Software Foundation; either
  10 version 3 of the License, or (at your option) any later version.
  11
  12 Libgfortran is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 Under Section 7 of GPL version 3, you are granted additional
  18 permissions described in the GCC Runtime Library Exception, version
  19 3.1, as published by the Free Software Foundation.
  20
  21 You should have received a copy of the GNU General Public License and
  22 a copy of the GCC Runtime Library Exception along with this program;
  23 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24 <http://www.gnu.org/licenses/>.  */
  25
  26 #include "libgfortran.h"
  27
  28 #include <errno.h>
  29 #include <string.h>
  30
  31 #ifdef HAVE_UNISTD_H
  32 #include <unistd.h>
  33 #endif
  34
  35 /* SUBROUTINE CHDIR(DIR, STATUS)
  36    CHARACTER(len=*), INTENT(IN) :: DIR
  37    INTEGER, INTENT(OUT), OPTIONAL :: STATUS  */
  38
  39 #ifdef HAVE_CHDIR
  40 extern void chdir_i4_sub (char *, GFC_INTEGER_4 *, gfc_charlen_type);
  41 iexport_proto(chdir_i4_sub);
  42
  43 void
  44 chdir_i4_sub (char *dir, GFC_INTEGER_4 *status, gfc_charlen_type dir_len)
  45 {
  46   int val;
  47   char *str;
  48
  49   /* Trim trailing spaces from paths.  */
  50   while (dir_len > 0 && dir[dir_len - 1] == ' ')
  51     dir_len--;
  52
  53   /* Make a null terminated copy of the strings.  */
  54   str = gfc_alloca (dir_len + 1);
  55   memcpy (str, dir, dir_len);
  56   str[dir_len] = '\0';
  57
  58   val = chdir (str);
  59
  60   if (status != NULL)
  61     *status = (val == 0) ? 0 : errno;
  62 }
  63 iexport(chdir_i4_sub);
  64
  65 extern void chdir_i8_sub (char *, GFC_INTEGER_8 *, gfc_charlen_type);
  66 iexport_proto(chdir_i8_sub);
  67
  68 void
  69 chdir_i8_sub (char *dir, GFC_INTEGER_8 *status, gfc_charlen_type dir_len)
  70 {
  71   int val;
  72   char *str;
  73
  74   /* Trim trailing spaces from paths.  */
  75   while (dir_len > 0 && dir[dir_len - 1] == ' ')
  76     dir_len--;
  77
  78   /* Make a null terminated copy of the strings.  */
  79   str = gfc_alloca (dir_len + 1);
  80   memcpy (str, dir, dir_len);
  81   str[dir_len] = '\0';
  82
  83   val = chdir (str);
  84
  85   if (status != NULL)
  86     *status = (val == 0) ? 0 : errno;
  87 }
  88 iexport(chdir_i8_sub);
  89
  90 extern GFC_INTEGER_4 chdir_i4 (char *, gfc_charlen_type);
  91 export_proto(chdir_i4);
  92
  93 GFC_INTEGER_4
  94 chdir_i4 (char *dir, gfc_charlen_type dir_len)
  95 {
  96   GFC_INTEGER_4 val;
  97   chdir_i4_sub (dir, &val, dir_len);
  98   return val;
  99 }
 100
 101 extern GFC_INTEGER_8 chdir_i8 (char *, gfc_charlen_type);
 102 export_proto(chdir_i8);
 103
 104 GFC_INTEGER_8
 105 chdir_i8 (char *dir, gfc_charlen_type dir_len)
 106 {
 107   GFC_INTEGER_8 val;
 108   chdir_i8_sub (dir, &val, dir_len);
 109   return val;
 110 }
 111 #endif