From b7f2a778337854a01e0c442cb2e65af161fe389b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Herm=C3=A8s=20B=C3=A9lusca-Ma=C3=AFto?=
 <hermes.belusca-maito@reactos.org>
Date: Sun, 2 Jun 2013 22:51:24 +0000
Subject: [PATCH] [RTL] Use RtlPrefixUnicodeString.

svn path=/trunk/; revision=59165
---
 reactos/lib/rtl/path.c | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)

diff --git a/reactos/lib/rtl/path.c b/reactos/lib/rtl/path.c
index 95a00ecb2a9..8d48262aadb 100644
--- a/reactos/lib/rtl/path.c
+++ b/reactos/lib/rtl/path.c
@@ -479,13 +479,19 @@ RtlpDosPathNameToRelativeNtPathName_Ustr(IN BOOLEAN HaveRelative,
     /* Capture input string */
     CapturedDosName = *DosName;
 
-    /* Check for \\?\ form */
-    if ((CapturedDosName.Length <= RtlpWin32NtRootSlash.Length) ||
-        (CapturedDosName.Buffer[0] != RtlpWin32NtRootSlash.Buffer[0]) ||
-        (CapturedDosName.Buffer[1] != RtlpWin32NtRootSlash.Buffer[1]) ||
-        (CapturedDosName.Buffer[2] != RtlpWin32NtRootSlash.Buffer[2]) ||
-        (CapturedDosName.Buffer[3] != RtlpWin32NtRootSlash.Buffer[3]))
+    /* Check for the presence of the NT prefix "\\?\" form */
+    if (RtlPrefixUnicodeString(&RtlpWin32NtRootSlash, &CapturedDosName, FALSE))
     {
+        /* NT prefix is contained in the path */
+
+        /* Use the optimized path after acquiring the lock */
+        QuickPath = TRUE;
+        NewBuffer = NULL;
+    }
+    else
+    {
+        /* NT prefix is not contained in the path */
+
         /* Quick path won't be used */
         QuickPath = FALSE;
 
@@ -498,12 +504,6 @@ RtlpDosPathNameToRelativeNtPathName_Ustr(IN BOOLEAN HaveRelative,
         DPRINT("MaxLength: %lx\n", MaxLength);
         if (!NewBuffer) return STATUS_NO_MEMORY;
     }
-    else
-    {
-        /* Use the optimized path after acquiring the lock */
-        QuickPath = TRUE;
-        NewBuffer = NULL;
-    }
 
     /* Lock the PEB and check if the quick path can be used */
     RtlAcquirePebLock();