[PATCH v1 04/27] BaseTools: Workspace - refactor RegEx to minimize multiple compiling

[Jaben Carsey <jaben.carsey@intel.com>]

Cc: Liming Gao <liming.gao@intel.com>
Cc: Yonghong Zhu <yonghong.zhu@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Jaben Carsey <jaben.carsey@intel.com>
---
 BaseTools/Source/Python/Workspace/DscBuildData.py   | 4 +++-
 BaseTools/Source/Python/Workspace/MetaFileParser.py | 8 ++++++--
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/BaseTools/Source/Python/Workspace/DscBuildData.py b/BaseTools/Source/Python/Workspace/DscBuildData.py
index d6b8b761d607..be3f7b6881e8 100644
--- a/BaseTools/Source/Python/Workspace/DscBuildData.py
+++ b/BaseTools/Source/Python/Workspace/DscBuildData.py
@@ -41,6 +41,8 @@ from Common.Misc import SaveFileOnChange
 from Workspace.BuildClassObject import PlatformBuildClassObject, StructurePcd, PcdClassObject, ModuleBuildClassObject
 from collections import OrderedDict
 
+variablePattern = re.compile(r'[\t\s]*0[xX][a-fA-F0-9]+$')
+
 #
 # Treat CHAR16 as a synonym for UINT16.  CHAR16 support is required for VFR C structs
 #
@@ -2421,7 +2423,7 @@ class DscBuildData(PlatformBuildClassObject):
             if VariableOffset.isdigit():
                 if int(VariableOffset, 10) > 0xFFFF:
                     ExceedMax = True
-            elif re.match(r'[\t\s]*0[xX][a-fA-F0-9]+$', VariableOffset):
+            elif variablePattern.match(VariableOffset):
                 if int(VariableOffset, 16) > 0xFFFF:
                     ExceedMax = True
             # For Offset written in "A.B"
diff --git a/BaseTools/Source/Python/Workspace/MetaFileParser.py b/BaseTools/Source/Python/Workspace/MetaFileParser.py
index 322ed3844966..550359f9abb2 100644
--- a/BaseTools/Source/Python/Workspace/MetaFileParser.py
+++ b/BaseTools/Source/Python/Workspace/MetaFileParser.py
@@ -35,6 +35,10 @@ from Common.LongFilePathSupport import OpenLongFilePath as open
 from MetaFileTable import MetaFileStorage
 from MetaFileCommentParser import CheckInfComment
 
+## RegEx for finding file versions
+hexVersionPattern = re.compile(r'0[xX][\da-f-A-F]{5,8}')
+decVersionPattern = re.compile(r'\d+\.\d+')
+
 ## A decorator used to parse macro definition
 def ParseMacro(Parser):
     def MacroParser(self):
@@ -366,9 +370,9 @@ class MetaFileParser(object):
                 EdkLogger.error("Parser", FORMAT_INVALID, "%s not defined" % (Macro), ExtraData=self._CurrentLine, File=self.MetaFile, Line=self._LineIndex + 1)
         # Sometimes, we need to make differences between EDK and EDK2 modules 
         if Name == 'INF_VERSION':
-            if re.match(r'0[xX][\da-f-A-F]{5,8}', Value):
+            if hexVersionPattern.match(Value):
                 self._Version = int(Value, 0)   
-            elif re.match(r'\d+\.\d+', Value):
+            elif decVersionPattern.match(Value):
                 ValueList = Value.split('.')
                 Major = '%04o' % int(ValueList[0], 0)
                 Minor = '%04o' % int(ValueList[1], 0)
-- 
2.16.2.windows.1