add a shared global regular expression for GUID matching

Cc: Yonghong Zhu <yonghong.zhu@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Jaben Carsey <jaben.carsey@intel.com>
---
 BaseTools/Source/Python/Common/GlobalData.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/BaseTools/Source/Python/Common/GlobalData.py b/BaseTools/Source/Python/Common/GlobalData.py
index 83ba3d19961a..4a85a8e0db63 100644
--- a/BaseTools/Source/Python/Common/GlobalData.py
+++ b/BaseTools/Source/Python/Common/GlobalData.py
@@ -51,6 +51,13 @@ gMacroRefPattern = re.compile("\$\(({})\)".format(_MacroNamePattern), re.UNICODE
 gMacroDefPattern = re.compile("^(DEFINE|EDK_GLOBAL)[ \t]+")
 gMacroNamePattern = re.compile("^{}$".format(_MacroNamePattern))
 
+# definition for a GUID.  used to create regular expressions below.
+_GuidPattern = r"[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}"
+
+## Regular expressions for GUID matching
+gGuidPattern = re.compile(r'{}'.format(_GuidPattern))
+gGuidPatternEnd = re.compile(r'{}$'.format(_GuidPattern))
+
 #
 # A global variable for whether current build in AutoGen phase or not.
 #
-- 
2.16.2.windows.1

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