[ion] 52623: [RTL]: Clarify what RtlGetLongestNtPathLength returns instead of using "+9" as a magic constant.

Author: ion
Date: Mon Jul 11 00:38:34 2011
New Revision: 52623

URL: http://svn.reactos.org/svn/reactos?rev=52623&view=rev
Log:
[RTL]: Clarify what RtlGetLongestNtPathLength returns instead of using "+9" as a magic constant.

Modified:
    trunk/reactos/lib/rtl/path.c

Modified: trunk/reactos/lib/rtl/path.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/lib/rtl/path.c?rev=52623&am...
==============================================================================
--- trunk/reactos/lib/rtl/path.c [iso-8859-1] (original)
+++ trunk/reactos/lib/rtl/path.c [iso-8859-1] Mon Jul 11 00:38:34 2011
@@ -28,6 +28,8 @@

static const UNICODE_STRING _condev = RTL_CONSTANT_STRING(L"\\.\CON");

+static const UNICODE_STRING _unc = RTL_CONSTANT_STRING(L"\??\UNC\");
+
 static const UNICODE_STRING _lpt = RTL_CONSTANT_STRING(L"LPT");

static const UNICODE_STRING _com = RTL_CONSTANT_STRING(L"COM");
@@ -46,9 +48,17 @@
 /*
  * @implemented
  */
-ULONG NTAPI RtlGetLongestNtPathLength (VOID)
-{
-   return (MAX_PATH + 9);
+ULONG
+NTAPI
+RtlGetLongestNtPathLength(VOID)
+{
+    /*
+     * The longest NT path is a DOS path that actually sits on a UNC path (ie:
+     * a mapped network drive), which is accessed through the DOS Global?? path.
+     * This is, and has always been equal to, 269 characters, except in Wine
+     * which claims this is 277. Go figure.
+     */
+    return (MAX_PATH + _unc.Length + sizeof(ANSI_NULL));
 }