Add in the 1st version of ECP.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@2832 6f19259b-4bc3-4df7-8a09-765794883524

EdkCompatibilityPkg/Foundation/Include/EfiStdArg.h

@@ -0,0 +1,75 @@
+/*++
+
+Copyright (c) 2004, Intel Corporation                                                         
+All rights reserved. This program and the accompanying materials                          
+are licensed and made available under the terms and conditions of the BSD License         
+which accompanies this distribution.  The full text of the license may be found at        
+http://opensource.org/licenses/bsd-license.php                                            
+                                                                                          
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             
+
+Module Name:
+
+  EfiStdArg.h
+
+Abstract:
+
+  Support for variable length argument lists using the ANSI standard.
+  
+  Since we are using the ANSI standard we used the standard nameing and
+  did not folow the coding convention
+
+  VA_LIST  - typedef for argument list.
+  VA_START (VA_LIST Marker, argument before the ...) - Init Marker for use.
+  VA_END (VA_LIST Marker) - Clear Marker
+  VA_ARG (VA_LIST Marker, var arg size) - Use Marker to get an argumnet from
+    the ... list. You must know the size and pass it in this macro.
+
+  example:
+
+  UINTN
+  ExampleVarArg (
+    IN UINTN  NumberOfArgs,
+    ...
+    )
+  {
+    VA_LIST Marker;
+    UINTN   Index;
+    UINTN   Result;
+
+    //
+    // Initialize the Marker
+    //
+    VA_START (Marker, NumberOfArgs);
+    for (Index = 0, Result = 0; Index < NumberOfArgs; Index++) {
+      //
+      // The ... list is a series of UINTN values, so average them up.
+      //
+      Result += VA_ARG (Marker, UINTN);
+    }
+
+    VA_END (Marker);
+    return Result
+  }
+
+--*/
+
+#ifndef _EFISTDARG_H_
+#define _EFISTDARG_H_
+
+#define _EFI_INT_SIZE_OF(n) ((sizeof (n) + sizeof (UINTN) - 1) &~(sizeof (UINTN) - 1))
+
+//
+// Also support coding convention rules for var arg macros
+//
+#ifndef VA_START
+
+typedef CHAR8 *VA_LIST;
+#define VA_START(ap, v) (ap = (VA_LIST) & (v) + _EFI_INT_SIZE_OF (v))
+#define VA_ARG(ap, t)   (*(t *) ((ap += _EFI_INT_SIZE_OF (t)) - _EFI_INT_SIZE_OF (t)))
+#define VA_END(ap)      (ap = (VA_LIST) 0)
+
+#endif
+
+#endif