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/EfiDepex.h

@@ -0,0 +1,54 @@
+/*++
+
+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:
+  EfiDepex.h
+
+Abstract:
+  This include file is only used in *.DXS files. Do not use this 
+  include file in normal DXE code.
+
+  Depex - Dependency Expresion
+
+  The BNF grammar is thus:
+     <depex>   ::= before GUID       
+                 | after GUID
+                 | SOR <bool>
+                 | <bool>            
+     <bool>    ::= <bool> and <term> 
+                 | <bool> or <term>  
+                 | <term>            
+     <term>    ::= not <factor>      
+                 | <factor>          
+     <factor>  ::= <bool>            
+                 | <boolval>         
+                 | <depinst>         
+                 | <termval>         
+     <boolval> ::= true              
+                 | false             
+     <depinst> ::= push GUID         
+     <termval> ::= end               
+
+--*/
+
+#ifndef _EFI_DEPEX_H_
+#define _EFI_DEPEX_H_
+
+#include "Tiano.h"
+
+//
+// The Depex grammer needs the string "TRUE" and "FALSE" we must
+// undo any pre-processor redefinitions
+//
+#undef TRUE
+#undef FALSE
+
+#endif