gMacroDefPattern = re.compile("^(DEFINE|EDK_GLOBAL)[ \t]+")\r
gMacroNamePattern = re.compile("^{}$".format(_MacroNamePattern))\r
\r
+# definition for a GUID. used to create regular expressions below.\r
+_HexChar = r"[0-9a-fA-F]"\r
+_GuidPattern = r"{Hex}{{8}}-{Hex}{{4}}-{Hex}{{4}}-{Hex}{{4}}-{Hex}{{12}}".format(Hex=_HexChar)\r
+\r
+## Regular expressions for GUID matching\r
+gGuidPattern = re.compile(r'{}'.format(_GuidPattern))\r
+gGuidPatternEnd = re.compile(r'{}$'.format(_GuidPattern))\r
+\r
+g4HexChar = re.compile(r'{}{{4}}'.format(_HexChar))\r
+\r
#\r
# A global variable for whether current build in AutoGen phase or not.\r
#\r