gnulib/import/rewinddir.c

   1 /* Restart reading the entries of a directory from the beginning.
   2    Copyright (C) 2011-2021 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 #include <config.h>
  18
  19 /* Specification.  */
  20 #include <dirent.h>
  21
  22 #include <errno.h>
  23
  24 #include "dirent-private.h"
  25
  26 /* Don't assume that UNICODE is not defined.  */
  27 #undef FindFirstFile
  28 #define FindFirstFile FindFirstFileA
  29
  30 void
  31 rewinddir (DIR *dirp)
  32 {
  33   /* Like in closedir().  */
  34   if (dirp->current != INVALID_HANDLE_VALUE)
  35     FindClose (dirp->current);
  36
  37   /* Like in opendir().  */
  38   dirp->status = -1;
  39   dirp->current = FindFirstFile (dirp->dir_name_mask, &dirp->entry);
  40   if (dirp->current == INVALID_HANDLE_VALUE)
  41     {
  42       switch (GetLastError ())
  43         {
  44         case ERROR_FILE_NOT_FOUND:
  45           dirp->status = -2;
  46           break;
  47         default:
  48           /* Save the error code for the next readdir() call.  */
  49           dirp->status = ENOENT;
  50           break;
  51         }
  52     }
  53 }