* wide_path.h (class wide_path): New class to convert Windows path

	to WCHAR win32 path, including long path conversion if necessary.
	* cygcheck.cc: Use class wide_path throughout to call Win32 functions
	taking potentially long filenames.
	(display_error): Use snprintf rather than sprintf.
	(display_error_fmt): Ditto.
	(dump_sysinfo): Use FindFirstFileW/FindNextFileW.
	* cygpath.cc: Use class wide_path throughout to call Win32 functions
	taking potentially long filenames.
	(get_device_name): Raise buffer size to take long pathnames.
	(get_short_paths): Convert to using GetShortPathNameW.
	(get_short_name): Ditto.
	(get_long_path_name_w32impl): Convert to equivalent of GetLongPathNameW.
	(get_long_name): Convert to using GetLongPathNameW.
	(do_sysfolders): Raise buffer size for POSIX pathname to PATH_MAX.
	(do_pathconv): In case of POSIX->Win32 conversion, convert to wchar_t
	Win32 path name and drop long pathname prefix if possible.
	(main): Call setlocale to accommodate wide char/multibyte conversions.

1 files changed, 43 insertions, 0 deletions

diff --git a/winsup/utils/wide_path.h b/winsup/utils/wide_path.h
new file mode 100644
index 000000000..8c49c5bf8
--- /dev/null
+++ b/winsup/utils/wide_path.h
@@ -0,0 +1,43 @@
+/* wide_path.h  -- Define class wide_path to convert multibyte win32 path
+                   to wchar_t Win32 path including long path prefix if
+		   necessary.
+
+   Copyright 2009 Red Hat, Inc.
+
+   This file is part of Cygwin.
+
+   This software is a copyrighted work licensed under the terms of the
+   Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
+   details. */
+
+#include <stdlib.h>
+#include <wchar.h>
+
+class wide_path
+{
+  wchar_t *wp;
+
+public:
+  wide_path () : wp (NULL) {}
+  wide_path (const char *mb_path)
+  {
+    int len = mbstowcs (NULL, mb_path, 0) + 1;
+    wp = (wchar_t *) malloc ((len + 6) * sizeof (wchar_t));
+    wchar_t *wp_p = wp;
+    if (len >= MAX_PATH && strncmp (mb_path, "\\\\?\\", 4) != 0)
+      {
+	wcscpy (wp_p, L"\\\\?\\");
+	wp_p += 4;
+	if (strncmp (mb_path, "\\\\", 2) == 0)
+	  {
+	    wcscpy (wp_p, L"UNC");
+	    wp_p += 3;
+	    ++mb_path;
+	    --len;
+	  }
+      }
+    mbstowcs (wp_p, mb_path, len);
+  }
+  ~wide_path () { if (wp) free (wp); }
+  operator const wchar_t *() const { return wp; }
+};