libgfortran/intrinsics/chdir.c

   1 /* Implementation of the CHDIR intrinsic.
   2    Copyright (C) 2005 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 2 of the License, or (at your option) any later version.
  11
  12 In addition to the permissions in the GNU General Public License, the
  13 Free Software Foundation gives you unlimited permission to link the
  14 compiled version of this file into combinations with other programs,
  15 and to distribute those combinations without any restriction coming
  16 from the use of this file.  (The General Public License restrictions
  17 do apply in other respects; for example, they cover modification of
  18 the file, and distribution when not linked into a combine
  19 executable.)
  20
  21 Libgfortran is distributed in the hope that it will be useful,
  22 but WITHOUT ANY WARRANTY; without even the implied warranty of
  23 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24 GNU General Public License for more details.
  25
  26 You should have received a copy of the GNU General Public
  27 License along with libgfortran; see the file COPYING.  If not,
  28 write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  29 Boston, MA 02110-1301, USA.  */
  30
  31 #include "config.h"
  32 #include "libgfortran.h"
  33
  34 #include <errno.h>
  35
  36 #ifdef HAVE_STRING_H
  37 #include <string.h>
  38 #endif
  39 #ifdef HAVE_UNISTD_H
  40 #include <unistd.h>
  41 #endif
  42
  43 /* SUBROUTINE CHDIR(DIR, STATUS)
  44    CHARACTER(len=*), INTENT(IN) :: DIR
  45    INTEGER, INTENT(OUT), OPTIONAL :: STATUS  */
  46
  47 #ifdef HAVE_CHDIR
  48 extern void chdir_i4_sub (char *, GFC_INTEGER_4 *, gfc_charlen_type);
  49 iexport_proto(chdir_i4_sub);
  50
  51 void
  52 chdir_i4_sub (char *dir, GFC_INTEGER_4 *status, gfc_charlen_type dir_len)
  53 {
  54   int val;
  55   char *str;
  56
  57   /* Trim trailing spaces from paths.  */
  58   while (dir_len > 0 && dir[dir_len - 1] == ' ')
  59     dir_len--;
  60
  61   /* Make a null terminated copy of the strings.  */
  62   str = gfc_alloca (dir_len + 1);
  63   memcpy (str, dir, dir_len);
  64   str[dir_len] = '\0';
  65
  66   val = chdir (str);
  67
  68   if (status != NULL)
  69     *status = (val == 0) ? 0 : errno;
  70 }
  71 iexport(chdir_i4_sub);
  72
  73 extern void chdir_i8_sub (char *, GFC_INTEGER_8 *, gfc_charlen_type);
  74 iexport_proto(chdir_i8_sub);
  75
  76 void
  77 chdir_i8_sub (char *dir, GFC_INTEGER_8 *status, gfc_charlen_type dir_len)
  78 {
  79   int val;
  80   char *str;
  81
  82   /* Trim trailing spaces from paths.  */
  83   while (dir_len > 0 && dir[dir_len - 1] == ' ')
  84     dir_len--;
  85
  86   /* Make a null terminated copy of the strings.  */
  87   str = gfc_alloca (dir_len + 1);
  88   memcpy (str, dir, dir_len);
  89   str[dir_len] = '\0';
  90
  91   val = chdir (str);
  92
  93   if (status != NULL)
  94     *status = (val == 0) ? 0 : errno;
  95 }
  96 iexport(chdir_i8_sub);
  97
  98 extern GFC_INTEGER_4 chdir_i4 (char *, gfc_charlen_type);
  99 export_proto(chdir_i4);
 100
 101 GFC_INTEGER_4
 102 chdir_i4 (char *dir, gfc_charlen_type dir_len)
 103 {
 104   GFC_INTEGER_4 val;
 105   chdir_i4_sub (dir, &val, dir_len);
 106   return val;
 107 }
 108
 109 extern GFC_INTEGER_8 chdir_i8 (char *, gfc_charlen_type);
 110 export_proto(chdir_i8);
 111
 112 GFC_INTEGER_8
 113 chdir_i8 (char *dir, gfc_charlen_type dir_len)
 114 {
 115   GFC_INTEGER_8 val;
 116   chdir_i8_sub (dir, &val, dir_len);
 117   return val;
 118 }
 119 #endif