implemented RtlHashUnicodeString and export it in ntdll

Modified: trunk/reactos/include/ndk/umtypes.h
Modified: trunk/reactos/lib/ntdll/def/ntdll.def
Modified: trunk/reactos/lib/rtl/unicode.c

--- trunk/reactos/include/ndk/umtypes.h	2005-06-22 20:51:22 UTC (rev 16225)
+++ trunk/reactos/include/ndk/umtypes.h	2005-06-22 21:01:13 UTC (rev 16226)
@@ -184,6 +184,11 @@

 #define VER_CONDITION_MASK              7
 #define VER_NUM_BITS_PER_CONDITION_MASK 3
 

+/* RTL String Hash Algorithms */
+#define HASH_STRING_ALGORITHM_DEFAULT   0
+#define HASH_STRING_ALGORITHM_X65599    1
+#define HASH_STRING_ALGORITHM_INVALID   0xffffffff
+

 /* List Macros */
 static __inline 
 VOID

--- trunk/reactos/lib/ntdll/def/ntdll.def	2005-06-22 20:51:22 UTC (rev 16225)
+++ trunk/reactos/lib/ntdll/def/ntdll.def	2005-06-22 21:01:13 UTC (rev 16226)
@@ -475,6 +475,7 @@

 RtlGetSecurityDescriptorRMControl@8
 ;RtlGetUserInfoHeap
 RtlGetVersion@4

+RtlHashUnicodeString@16

 RtlIdentifierAuthoritySid@4
 RtlImageDirectoryEntryToData@16
 RtlImageNtHeader@4

--- trunk/reactos/lib/rtl/unicode.c	2005-06-22 20:51:22 UTC (rev 16225)
+++ trunk/reactos/lib/rtl/unicode.c	2005-06-22 21:01:13 UTC (rev 16226)
@@ -1603,19 +1603,55 @@

 }
 
 /*

-* @unimplemented

+* @implemented

 */
 NTSTATUS
 STDCALL
 RtlHashUnicodeString(

-	IN const UNICODE_STRING *String,
-	IN BOOLEAN CaseInSensitive,
-	IN ULONG HashAlgorithm,
-	OUT PULONG HashValue
-	)

+  IN CONST UNICODE_STRING *String,
+  IN BOOLEAN CaseInSensitive,
+  IN ULONG HashAlgorithm,
+  OUT PULONG HashValue)

 {

-	UNIMPLEMENTED;
-	return STATUS_NOT_IMPLEMENTED;

+    if (String != NULL && HashValue != NULL)
+    {
+        switch (HashAlgorithm)
+        {
+            case HASH_STRING_ALGORITHM_DEFAULT:
+            case HASH_STRING_ALGORITHM_X65599:
+            {
+                WCHAR *c, *end;
+
+                *HashValue = 0;
+                end = String->Buffer + (String->Length / sizeof(WCHAR));
+
+                if (CaseInSensitive)
+                {
+                    for (c = String->Buffer;
+                         c != end;
+                         c++)
+                    {
+                        /* only uppercase characters if they are 'a' ... 'z'! */
+                        *HashValue = ((65599 * (*HashValue)) +
+                                      (ULONG)(((*c) >= L'a' && (*c) <= L'z') ?
+                                              (*c) - L'a' + L'A' : (*c)));
+                    }
+                }
+                else
+                {
+                    for (c = String->Buffer;
+                         c != end;
+                         c++)
+                    {
+                        *HashValue = ((65599 * (*HashValue)) + (ULONG)(*c));
+                    }
+                }
+                return STATUS_SUCCESS;
+            }
+        }
+    }
+
+    return STATUS_INVALID_PARAMETER;

 }
 
 /*