libgfortran/io/close.c

   1 /* Copyright (C) 2002-2003 Free Software Foundation, Inc.
   2    Contributed by Andy Vaught
   3
   4 This file is part of the GNU Fortran 95 runtime library (libgfortran).
   5
   6 Libgfortran is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 Libgfortran is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with Libgfortran; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21 #include "config.h"
  22 #include "libgfortran.h"
  23 #include "io.h"
  24
  25 typedef enum
  26 { CLOSE_DELETE, CLOSE_KEEP, CLOSE_UNSPECIFIED }
  27 close_status;
  28
  29 static st_option status_opt[] = {
  30   {"keep", CLOSE_KEEP},
  31   {"delete", CLOSE_DELETE},
  32   {NULL}
  33 };
  34
  35
  36 extern void st_close (void);
  37 export_proto(st_close);
  38
  39 void
  40 st_close (void)
  41 {
  42   close_status status;
  43   gfc_unit *u;
  44
  45   library_start ();
  46
  47   status = (ioparm.status == NULL) ? CLOSE_UNSPECIFIED :
  48     find_option (ioparm.status, ioparm.status_len, status_opt,
  49                  "Bad STATUS parameter in CLOSE statement");
  50
  51   if (ioparm.library_return != LIBRARY_OK)
  52     return;
  53
  54   u = find_unit (ioparm.unit);
  55   if (u != NULL)
  56     {
  57       if (u->flags.status == STATUS_SCRATCH)
  58         {
  59           if (status == CLOSE_KEEP)
  60             generate_error (ERROR_BAD_OPTION,
  61                             "Can't KEEP a scratch file on CLOSE");
  62         }
  63       else
  64         {
  65           if (status == CLOSE_DELETE)
  66             delete_file (u);
  67         }
  68
  69       close_unit (u);
  70     }
  71
  72   library_end ();
  73 }