libguile/win32-dirent.c

   1 /* Copyright (C) 2001 Free Software Foundation, Inc.
   2  *
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2, or (at your option)
   6  * any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this software; see the file COPYING.  If not, write to
  15  * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
  16  * Boston, MA 02111-1307 USA
  17  *
  18  * As a special exception, the Free Software Foundation gives permission
  19  * for additional uses of the text contained in its release of GUILE.
  20  *
  21  * The exception is that, if you link the GUILE library with other files
  22  * to produce an executable, this does not by itself cause the
  23  * resulting executable to be covered by the GNU General Public License.
  24  * Your use of that executable is in no way restricted on account of
  25  * linking the GUILE library code into it.
  26  *
  27  * This exception does not however invalidate any other reasons why
  28  * the executable file might be covered by the GNU General Public License.
  29  *
  30  * This exception applies only to the code released by the
  31  * Free Software Foundation under the name GUILE.  If you copy
  32  * code from other Free Software Foundation releases into a copy of
  33  * GUILE, as the General Public License permits, the exception does
  34  * not apply to the code that you add in this way.  To avoid misleading
  35  * anyone as to the status of such modified files, you must delete
  36  * this exception notice from them.
  37  *
  38  * If you write modifications of your own for GUILE, it is your choice
  39  * whether to permit this exception to apply to your modifications.
  40  * If you do not wish that, delete this exception notice.  */
  41
  42 #include "libguile/__scm.h"
  43
  44 #include <windows.h>
  45 #include <stdio.h>
  46 #include <string.h>
  47
  48 #include "dirent.h"
  49
  50 DIR *
  51 opendir (const char * name)
  52 {
  53   DIR *dir;
  54   HANDLE hnd;
  55   char *file;
  56   WIN32_FIND_DATA find;
  57
  58   if (!name || !*name)
  59     return NULL;
  60   file = malloc (strlen (name) + 3);
  61   strcpy (file, name);
  62   if (file[strlen (name) - 1] != '/' && file[strlen (name) - 1] != '\\')
  63     strcat (file, "/*");
  64   else
  65     strcat (file, "*");
  66
  67   if ((hnd = FindFirstFile (file, &find)) == INVALID_HANDLE_VALUE)
  68     {
  69       free (file);
  70       return NULL;
  71     }
  72
  73   dir = malloc (sizeof (DIR));
  74   dir->mask = file;
  75   dir->fd = (int) hnd;
  76   dir->data = malloc (sizeof (WIN32_FIND_DATA));
  77   dir->allocation = sizeof (WIN32_FIND_DATA);
  78   dir->size = dir->allocation;
  79   dir->filepos = 0;
  80   memcpy (dir->data, &find, sizeof (WIN32_FIND_DATA));
  81   return dir;
  82 }
  83
  84 struct dirent *
  85 readdir (DIR * dir)
  86 {
  87   static struct dirent entry;
  88   WIN32_FIND_DATA *find;
  89
  90   entry.d_ino = 0;
  91   entry.d_type = 0;
  92   find = (WIN32_FIND_DATA *) dir->data;
  93
  94   if (dir->filepos)
  95     {
  96       if (!FindNextFile ((HANDLE) dir->fd, find))
  97         return NULL;
  98     }
  99
 100   entry.d_off = dir->filepos;
 101   strncpy (entry.d_name, find->cFileName, sizeof (entry.d_name));
 102   entry.d_reclen = strlen (find->cFileName);
 103   dir->filepos++;
 104   return &entry;
 105 }
 106
 107 int
 108 closedir (DIR * dir)
 109 {
 110   HANDLE hnd = (HANDLE) dir->fd;
 111   free (dir->data);
 112   free (dir->mask);
 113   free (dir);
 114   return FindClose (hnd) ? 0 : -1;
 115 }
 116
 117 void
 118 rewinddir (DIR * dir)
 119 {
 120   HANDLE hnd = (HANDLE) dir->fd;
 121   WIN32_FIND_DATA *find = (WIN32_FIND_DATA *) dir->data;
 122
 123   FindClose (hnd);
 124   hnd = FindFirstFile (dir->mask, find);
 125   dir->fd = (int) hnd;
 126   dir->filepos = 0;
 127 }
 128
 129 void
 130 seekdir (DIR * dir, off_t offset)
 131 {
 132   off_t n;
 133
 134   rewinddir (dir);
 135   for (n = 0; n < offset; n++)
 136     {
 137       if (FindNextFile ((HANDLE) dir->fd, (WIN32_FIND_DATA *) dir->data))
 138         dir->filepos++;
 139     }
 140 }
 141
 142 off_t
 143 telldir (DIR * dir)
 144 {
 145   return dir->filepos;
 146 }
 147
 148 int
 149 dirfd (DIR * dir)
 150 {
 151   return dir->fd;
 152 }