Add SetMemN() and ScanMemN() to the BaseMemoryLib class and all BaseMemoryLib implementations

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@9517 6f19259b-4bc3-4df7-8a09-765794883524

MdePkg/Library/BaseMemoryLib/SetMemWrapper.c

@@ -1,5 +1,5 @@
 /** @file
-  SetMem() implementation.
+  SetMem() and SetMemN() implementation.
 
   The following BaseMemoryLib instances contain the same copy of this file:
 
@@ -55,3 +55,36 @@ SetMem (
 
   return InternalMemSetMem (Buffer, Length, Value);
 }
+
+/**
+  Fills a target buffer with a value that is size UINTN, and returns the target buffer.
+
+  This function fills Length bytes of Buffer with the UINTN sized value specified by
+  Value, and returns Buffer. Value is repeated every sizeof(UINTN) bytes for Length
+  bytes of Buffer.
+
+  If Length > 0 and Buffer is NULL, then ASSERT().
+  If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT().
+  If Buffer is not aligned on a UINTN boundary, then ASSERT().
+  If Length is not aligned on a UINTN boundary, then ASSERT().
+
+  @param  Buffer  Pointer to the target buffer to fill.
+  @param  Length  Number of bytes in Buffer to fill.
+  @param  Value   Value with which to fill Length bytes of Buffer.
+
+  @return Buffer.
+
+**/
+VOID *
+EFIAPI
+SetMemN (
+  OUT VOID  *Buffer,
+  IN UINTN  Length,
+  IN UINTN  Value
+  )
+{
+  if (sizeof (UINTN) == sizeof (UINT64)) {
+    return SetMem64 (Buffer, Length, (UINT64)Value);
+  }
+  return SetMem32 (Buffer, Length, (UINT32)Value);
+}