3 * This file has no copyright assigned and is placed in the Public Domain.
4 * This file is a part of the mingw-runtime package.
5 * No warranty is given; refer to the file DISCLAIMER within the package.
7 * Derived from DIRLIB.C by Matt J. Weinstein
8 * This note appears in the DIRLIB.H
9 * DIRLIB.H by M. J. Weinstein Released to public domain 1-Jan-89
11 * Updated by Jeremy Bettis <jeremy@hksys.com>
12 * Significantly revised and rewinddir, seekdir and telldir added by Colin
13 * Peters <colin@fu.is.saga-u.ac.jp>
24 #define WIN32_LEAN_AND_MEAN
25 #include <windows.h> /* for GetFileAttributes */
30 #define _tdirent _wdirent
32 #define _topendir _wopendir
33 #define _tclosedir _wclosedir
34 #define _treaddir _wreaddir
35 #define _trewinddir _wrewinddir
36 #define _ttelldir _wtelldir
37 #define _tseekdir _wseekdir
39 #define _tdirent dirent
41 #define _topendir opendir
42 #define _tclosedir closedir
43 #define _treaddir readdir
44 #define _trewinddir rewinddir
45 #define _ttelldir telldir
46 #define _tseekdir seekdir
49 #define SUFFIX _T("*")
50 #define SLASH _T("\\")
56 * Returns a pointer to a DIR structure appropriately filled in to begin
57 * searching a directory.
60 _topendir (const _TCHAR *szPath)
64 _TCHAR szFullPath[MAX_PATH];
74 if (szPath[0] == _T('\0'))
80 /* Attempt to determine if the given path really is a directory. */
81 rc = GetFileAttributes (szPath);
82 if (rc == (unsigned int)-1)
84 /* call GetLastError for more error info */
88 if (!(rc & FILE_ATTRIBUTE_DIRECTORY))
90 /* Error, entry exists but not a directory. */
95 /* Make an absolute pathname. */
96 _tfullpath (szFullPath, szPath, MAX_PATH);
98 /* Allocate enough space to store DIR structure and the complete
99 * directory path given. */
100 nd = (_TDIR *) malloc (sizeof (_TDIR) + (_tcslen(szFullPath) + _tcslen (SLASH) +
101 _tcslen(SUFFIX) + 1) * sizeof(_TCHAR));
105 /* Error, out of memory. */
110 /* Create the search expression. */
111 _tcscpy (nd->dd_name, szFullPath);
113 /* Add on a slash if the path does not end with one. */
114 if (nd->dd_name[0] != _T('\0') &&
115 nd->dd_name[_tcslen (nd->dd_name) - 1] != _T('/') &&
116 nd->dd_name[_tcslen (nd->dd_name) - 1] != _T('\\'))
118 _tcscat (nd->dd_name, SLASH);
121 /* Add on the search pattern */
122 _tcscat (nd->dd_name, SUFFIX);
124 /* Initialize handle to -1 so that a premature closedir doesn't try
125 * to call _findclose on it. */
128 /* Initialize the status. */
131 /* Initialize the dirent structure. ino and reclen are invalid under
132 * Win32, and name simply points at the appropriate part of the
133 * findfirst_t structure. */
134 nd->dd_dir.d_ino = 0;
135 nd->dd_dir.d_reclen = 0;
136 nd->dd_dir.d_namlen = 0;
137 memset (nd->dd_dir.d_name, 0, FILENAME_MAX);
146 * Return a pointer to a dirent structure filled with the information on the
147 * next entry in the directory.
150 _treaddir (_TDIR * dirp)
154 /* Check for valid DIR struct. */
158 return (struct _tdirent *) 0;
161 if (dirp->dd_stat < 0)
163 /* We have already returned all files in the directory
164 * (or the structure has an invalid dd_stat). */
165 return (struct _tdirent *) 0;
167 else if (dirp->dd_stat == 0)
169 /* We haven't started the search yet. */
170 /* Start the search */
171 dirp->dd_handle = _tfindfirst (dirp->dd_name, &(dirp->dd_dta));
173 if (dirp->dd_handle == -1)
175 /* Whoops! Seems there are no files in that
186 /* Get the next search entry. */
187 if (_tfindnext (dirp->dd_handle, &(dirp->dd_dta)))
189 /* We are off the end or otherwise error.
190 _findnext sets errno to ENOENT if no more file
192 DWORD winerr = GetLastError();
193 if (winerr == ERROR_NO_MORE_FILES)
195 _findclose (dirp->dd_handle);
196 dirp->dd_handle = -1;
201 /* Update the status to indicate the correct
207 if (dirp->dd_stat > 0)
209 /* Successfully got an entry. Everything about the file is
210 * already appropriately filled in except the length of the
212 dirp->dd_dir.d_namlen = _tcslen (dirp->dd_dta.name);
213 _tcscpy (dirp->dd_dir.d_name, dirp->dd_dta.name);
214 return &dirp->dd_dir;
217 return (struct _tdirent *) 0;
224 * Frees up resources allocated by opendir.
227 _tclosedir (_TDIR * dirp)
240 if (dirp->dd_handle != -1)
242 rc = _findclose (dirp->dd_handle);
245 /* Delete the dir structure. */
254 * Return to the beginning of the directory "stream". We simply call findclose
255 * and then reset things like an opendir.
258 _trewinddir (_TDIR * dirp)
268 if (dirp->dd_handle != -1)
270 _findclose (dirp->dd_handle);
273 dirp->dd_handle = -1;
280 * Returns the "position" in the "directory stream" which can be used with
281 * seekdir to go back to an old entry. We simply return the value in stat.
284 _ttelldir (_TDIR * dirp)
293 return dirp->dd_stat;
299 * Seek to an entry previously returned by telldir. We rewind the directory
300 * and call readdir repeatedly until either dd_stat is the position number
301 * or -1 (off the end). This is not perfect, in that the directory may
302 * have changed while we weren't looking. But that is probably the case with
306 _tseekdir (_TDIR * dirp, long lPos)
318 /* Seeking to an invalid position. */
325 if (dirp->dd_handle != -1)
327 _findclose (dirp->dd_handle);
329 dirp->dd_handle = -1;
334 /* Rewind and read forward to the appropriate index. */
337 while ((dirp->dd_stat < lPos) && _treaddir (dirp))