[pschweitzer] 50022: [NTOSKRNL] Merge some changes from r50021 to FsRtlIsNameInExpression() to make code easier to read and understand...

Author: pschweitzer
Date: Mon Dec 13 11:33:29 2010
New Revision: 50022

URL: http://svn.reactos.org/svn/reactos?rev=50022&view=rev
Log:
[NTOSKRNL]
Merge some changes from r50021 to FsRtlIsNameInExpression() to make code easier to read
and understand...

Modified:
    trunk/reactos/ntoskrnl/fsrtl/name.c

Modified: trunk/reactos/ntoskrnl/fsrtl/name.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/fsrtl/name.c?rev=…
==============================================================================
--- trunk/reactos/ntoskrnl/fsrtl/name.c [iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/fsrtl/name.c [iso-8859-1] Mon Dec 13 11:33:29 2010
@@ -22,63 +22,63 @@
                                IN BOOLEAN IgnoreCase,
                                IN PWCHAR UpcaseTable OPTIONAL)
 {
-    ULONG i = 0, j, k = 0;
+    USHORT ExpressionPosition = 0, NamePosition = 0, MatchingChars;
     PAGED_CODE();
 
     ASSERT(!IgnoreCase || UpcaseTable);
 
-    while (i < Name->Length / sizeof(WCHAR) && k < Expression->Length
/ sizeof(WCHAR))
-    {
-        if ((Expression->Buffer[k] == (IgnoreCase ? UpcaseTable[Name->Buffer[i]] :
Name->Buffer[i])) ||
-            (Expression->Buffer[k] == L'?') || (Expression->Buffer[k] ==
DOS_QM) ||
-            (Expression->Buffer[k] == DOS_DOT && Name->Buffer[i] ==
L'.'))
-        {
-            i++;
-            k++;
-        }
-        else if (Expression->Buffer[k] == L'*')
-        {
-            if (k < (Expression->Length / sizeof(WCHAR) - 1))
-            {
-                if (Expression->Buffer[k+1] != L'*' &&
Expression->Buffer[k+1] != L'?' &&
-                    Expression->Buffer[k+1] != DOS_DOT &&
Expression->Buffer[k+1] != DOS_QM &&
-                    Expression->Buffer[k+1] != DOS_STAR)
+    while (NamePosition < Name->Length / sizeof(WCHAR) &&
ExpressionPosition < Expression->Length / sizeof(WCHAR))
+    {
+        if ((Expression->Buffer[ExpressionPosition] == (IgnoreCase ?
UpcaseTable[Name->Buffer[NamePosition]] : Name->Buffer[NamePosition])) ||
+            (Expression->Buffer[ExpressionPosition] == L'?') ||
(Expression->Buffer[ExpressionPosition] == DOS_QM) ||
+            (Expression->Buffer[ExpressionPosition] == DOS_DOT &&
Name->Buffer[NamePosition] == L'.'))
+        {
+            NamePosition++;
+            ExpressionPosition++;
+        }
+        else if (Expression->Buffer[ExpressionPosition] == L'*')
+        {
+            if (ExpressionPosition < (Expression->Length / sizeof(WCHAR) - 1))
+            {
+                if (Expression->Buffer[ExpressionPosition+1] != L'*'
&& Expression->Buffer[ExpressionPosition+1] != L'?' &&
+                    Expression->Buffer[ExpressionPosition+1] != DOS_DOT &&
Expression->Buffer[ExpressionPosition+1] != DOS_QM &&
+                    Expression->Buffer[ExpressionPosition+1] != DOS_STAR)
                 {
-                    while ((IgnoreCase ? UpcaseTable[Name->Buffer[i]] :
Name->Buffer[i]) != Expression->Buffer[k+1] &&
-                           i < Name->Length / sizeof(WCHAR)) i++;
+                    while ((IgnoreCase ? UpcaseTable[Name->Buffer[NamePosition]] :
Name->Buffer[NamePosition]) != Expression->Buffer[ExpressionPosition+1] &&
+                           NamePosition < Name->Length / sizeof(WCHAR))
NamePosition++;
                 }
             }
             else
             {
-                i = Name->Length / sizeof(WCHAR);
-            }
-            k++;
-        }
-        else if (Expression->Buffer[k] == DOS_STAR)
-        {
-            j = i;
-            while (j < Name->Length / sizeof(WCHAR))
-            {
-                if (Name->Buffer[j] == L'.')
+                NamePosition = Name->Length / sizeof(WCHAR);
+            }
+            ExpressionPosition++;
+        }
+        else if (Expression->Buffer[ExpressionPosition] == DOS_STAR)
+        {
+            MatchingChars = NamePosition;
+            while (MatchingChars < Name->Length / sizeof(WCHAR))
+            {
+                if (Name->Buffer[MatchingChars] == L'.')
                 {
-                    i = j;
+                    NamePosition = MatchingChars;
                 }
-                j++;
-            }
-            k++;
+                MatchingChars++;
+            }
+            ExpressionPosition++;
         }
         else
         {
-            i = Name->Length / sizeof(WCHAR);
-        }
-    }
-    if (k + 1 == Expression->Length / sizeof(WCHAR) && i == Name->Length /
sizeof(WCHAR) &&
-        Expression->Buffer[k] == DOS_DOT)
-    {
-        k++;
-    }
-
-    return (k == Expression->Length / sizeof(WCHAR) && i == Name->Length /
sizeof(WCHAR));
+            NamePosition = Name->Length / sizeof(WCHAR);
+        }
+    }
+    if (ExpressionPosition + 1 == Expression->Length / sizeof(WCHAR) &&
NamePosition == Name->Length / sizeof(WCHAR) &&
+        Expression->Buffer[ExpressionPosition] == DOS_DOT)
+    {
+        ExpressionPosition++;
+    }
+
+    return (ExpressionPosition == Expression->Length / sizeof(WCHAR) &&
NamePosition == Name->Length / sizeof(WCHAR));
 }
 
 /* PUBLIC FUNCTIONS **********************************************************/