externals. The relevant directories and files have been svn add'ed to GLib

2008-05-17  Tor Lillqvist  <tml@novell.com>

	* "build" is no longer include into GLib through
	svn:externals. The relevant directories and files have been svn
	add'ed to GLib (trunk) instead.


svn path=/trunk/; revision=6895

build/win32/dirent/dirent.c

@@ -0,0 +1,340 @@
+/*
+ * dirent.c
+ * This file has no copyright assigned and is placed in the Public Domain.
+ * This file is a part of the mingw-runtime package.
+ * No warranty is given; refer to the file DISCLAIMER within the package.
+ *
+ * Derived from DIRLIB.C by Matt J. Weinstein
+ * This note appears in the DIRLIB.H
+ * DIRLIB.H by M. J. Weinstein   Released to public domain 1-Jan-89
+ *
+ * Updated by Jeremy Bettis <jeremy@hksys.com>
+ * Significantly revised and rewinddir, seekdir and telldir added by Colin
+ * Peters <colin@fu.is.saga-u.ac.jp>
+ *	
+ */
+
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <io.h>
+#include <direct.h>
+#include <dirent.h>
+
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h> /* for GetFileAttributes */
+
+#include <tchar.h>
+
+#ifdef _UNICODE
+#define _tdirent	_wdirent
+#define _TDIR 		_WDIR
+#define _topendir	_wopendir
+#define _tclosedir	_wclosedir
+#define _treaddir	_wreaddir
+#define _trewinddir	_wrewinddir
+#define _ttelldir	_wtelldir
+#define _tseekdir	_wseekdir
+#else
+#define _tdirent	dirent
+#define _TDIR 		DIR
+#define _topendir	opendir
+#define _tclosedir	closedir
+#define _treaddir	readdir
+#define _trewinddir	rewinddir
+#define _ttelldir	telldir
+#define _tseekdir	seekdir
+#endif
+
+#define SUFFIX	_T("*")
+#define	SLASH	_T("\\")
+
+
+/*
+ * opendir
+ *
+ * Returns a pointer to a DIR structure appropriately filled in to begin
+ * searching a directory.
+ */
+_TDIR *
+_topendir (const _TCHAR *szPath)
+{
+  _TDIR *nd;
+  unsigned int rc;
+  _TCHAR szFullPath[MAX_PATH];
+	
+  errno = 0;
+
+  if (!szPath)
+    {
+      errno = EFAULT;
+      return (_TDIR *) 0;
+    }
+
+  if (szPath[0] == _T('\0'))
+    {
+      errno = ENOTDIR;
+      return (_TDIR *) 0;
+    }
+
+  /* Attempt to determine if the given path really is a directory. */
+  rc = GetFileAttributes (szPath);
+  if (rc == (unsigned int)-1)
+    {
+      /* call GetLastError for more error info */
+      errno = ENOENT;
+      return (_TDIR *) 0;
+    }
+  if (!(rc & FILE_ATTRIBUTE_DIRECTORY))
+    {
+      /* Error, entry exists but not a directory. */
+      errno = ENOTDIR;
+      return (_TDIR *) 0;
+    }
+
+  /* Make an absolute pathname.  */
+  _tfullpath (szFullPath, szPath, MAX_PATH);
+
+  /* Allocate enough space to store DIR structure and the complete
+   * directory path given. */
+  nd = (_TDIR *) malloc (sizeof (_TDIR) + (_tcslen(szFullPath) + _tcslen (SLASH) +
+			 _tcslen(SUFFIX) + 1) * sizeof(_TCHAR));
+
+  if (!nd)
+    {
+      /* Error, out of memory. */
+      errno = ENOMEM;
+      return (_TDIR *) 0;
+    }
+
+  /* Create the search expression. */
+  _tcscpy (nd->dd_name, szFullPath);
+
+  /* Add on a slash if the path does not end with one. */
+  if (nd->dd_name[0] != _T('\0') &&
+      nd->dd_name[_tcslen (nd->dd_name) - 1] != _T('/') &&
+      nd->dd_name[_tcslen (nd->dd_name) - 1] != _T('\\'))
+    {
+      _tcscat (nd->dd_name, SLASH);
+    }
+
+  /* Add on the search pattern */
+  _tcscat (nd->dd_name, SUFFIX);
+
+  /* Initialize handle to -1 so that a premature closedir doesn't try
+   * to call _findclose on it. */
+  nd->dd_handle = -1;
+
+  /* Initialize the status. */
+  nd->dd_stat = 0;
+
+  /* Initialize the dirent structure. ino and reclen are invalid under
+   * Win32, and name simply points at the appropriate part of the
+   * findfirst_t structure. */
+  nd->dd_dir.d_ino = 0;
+  nd->dd_dir.d_reclen = 0;
+  nd->dd_dir.d_namlen = 0;
+  memset (nd->dd_dir.d_name, 0, FILENAME_MAX);
+
+  return nd;
+}
+
+
+/*
+ * readdir
+ *
+ * Return a pointer to a dirent structure filled with the information on the
+ * next entry in the directory.
+ */
+struct _tdirent *
+_treaddir (_TDIR * dirp)
+{
+  errno = 0;
+
+  /* Check for valid DIR struct. */
+  if (!dirp)
+    {
+      errno = EFAULT;
+      return (struct _tdirent *) 0;
+    }
+
+  if (dirp->dd_stat < 0)
+    {
+      /* We have already returned all files in the directory
+       * (or the structure has an invalid dd_stat). */
+      return (struct _tdirent *) 0;
+    }
+  else if (dirp->dd_stat == 0)
+    {
+      /* We haven't started the search yet. */
+      /* Start the search */
+      dirp->dd_handle = _tfindfirst (dirp->dd_name, &(dirp->dd_dta));
+
+  	  if (dirp->dd_handle == -1)
+	{
+	  /* Whoops! Seems there are no files in that
+	   * directory. */
+	  dirp->dd_stat = -1;
+	}
+      else
+	{
+	  dirp->dd_stat = 1;
+	}
+    }
+  else
+    {
+      /* Get the next search entry. */
+      if (_tfindnext (dirp->dd_handle, &(dirp->dd_dta)))
+	{
+	  /* We are off the end or otherwise error.	
+	     _findnext sets errno to ENOENT if no more file
+	     Undo this. */
+	  DWORD winerr = GetLastError();
+	  if (winerr == ERROR_NO_MORE_FILES)
+	    errno = 0;	
+	  _findclose (dirp->dd_handle);
+	  dirp->dd_handle = -1;
+	  dirp->dd_stat = -1;
+	}
+      else
+	{
+	  /* Update the status to indicate the correct
+	   * number. */
+	  dirp->dd_stat++;
+	}
+    }
+
+  if (dirp->dd_stat > 0)
+    {
+      /* Successfully got an entry. Everything about the file is
+       * already appropriately filled in except the length of the
+       * file name. */
+      dirp->dd_dir.d_namlen = _tcslen (dirp->dd_dta.name);
+      _tcscpy (dirp->dd_dir.d_name, dirp->dd_dta.name);
+      return &dirp->dd_dir;
+    }
+
+  return (struct _tdirent *) 0;
+}
+
+
+/*
+ * closedir
+ *
+ * Frees up resources allocated by opendir.
+ */
+int
+_tclosedir (_TDIR * dirp)
+{
+  int rc;
+
+  errno = 0;
+  rc = 0;
+
+  if (!dirp)
+    {
+      errno = EFAULT;
+      return -1;
+    }
+
+  if (dirp->dd_handle != -1)
+    {
+      rc = _findclose (dirp->dd_handle);
+    }
+
+  /* Delete the dir structure. */
+  free (dirp);
+
+  return rc;
+}
+
+/*
+ * rewinddir
+ *
+ * Return to the beginning of the directory "stream". We simply call findclose
+ * and then reset things like an opendir.
+ */
+void
+_trewinddir (_TDIR * dirp)
+{
+  errno = 0;
+
+  if (!dirp)
+    {
+      errno = EFAULT;
+      return;
+    }
+
+  if (dirp->dd_handle != -1)
+    {
+      _findclose (dirp->dd_handle);
+    }
+
+  dirp->dd_handle = -1;
+  dirp->dd_stat = 0;
+}
+
+/*
+ * telldir
+ *
+ * Returns the "position" in the "directory stream" which can be used with
+ * seekdir to go back to an old entry. We simply return the value in stat.
+ */
+long
+_ttelldir (_TDIR * dirp)
+{
+  errno = 0;
+
+  if (!dirp)
+    {
+      errno = EFAULT;
+      return -1;
+    }
+  return dirp->dd_stat;
+}
+
+/*
+ * seekdir
+ *
+ * Seek to an entry previously returned by telldir. We rewind the directory
+ * and call readdir repeatedly until either dd_stat is the position number
+ * or -1 (off the end). This is not perfect, in that the directory may
+ * have changed while we weren't looking. But that is probably the case with
+ * any such system.
+ */
+void
+_tseekdir (_TDIR * dirp, long lPos)
+{
+  errno = 0;
+
+  if (!dirp)
+    {
+      errno = EFAULT;
+      return;
+    }
+
+  if (lPos < -1)
+    {
+      /* Seeking to an invalid position. */
+      errno = EINVAL;
+      return;
+    }
+  else if (lPos == -1)
+    {
+      /* Seek past end. */
+      if (dirp->dd_handle != -1)
+	{
+	  _findclose (dirp->dd_handle);
+	}
+      dirp->dd_handle = -1;
+      dirp->dd_stat = -1;
+    }
+  else
+    {
+      /* Rewind and read forward to the appropriate index. */
+      _trewinddir (dirp);
+
+      while ((dirp->dd_stat < lPos) && _treaddir (dirp))
+	;
+    }
+}