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diff --git a/BaseTools/Source/Python/AutoGen/InfSectionParser.py b/BaseTools/Source/Python/AutoGen/InfSectionParser.py
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+++ b/BaseTools/Source/Python/AutoGen/InfSectionParser.py
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+## @file
+# Parser a Inf file and Get specify section data.
+#
+# Copyright (c) 2007 - 2012, Intel Corporation. All rights reserved.<BR>
+# 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.
+#
+
+## Import Modules
+#
+
+import Common.EdkLogger as EdkLogger
+from Common.BuildToolError import *
+from Common.DataType import *
+ 
+
+class InfSectionParser():
+    def __init__(self, FilePath):
+        self._FilePath = FilePath
+        self._FileSectionDataList = []
+        self._ParserInf()
+    
+    def _ParserInf(self):
+        Filename = self._FilePath
+        FileLinesList = []
+        UserExtFind = False
+        FindEnd = True
+        FileLastLine = False
+        SectionLine = ''
+        SectionData = []
+        
+        try:
+            FileLinesList = open(Filename, "r", 0).readlines()
+        except BaseException:
+            EdkLogger.error("build", AUTOGEN_ERROR, 'File %s is opened failed.' % Filename)
+        
+        for Index in range(0, len(FileLinesList)):
+            line = str(FileLinesList[Index]).strip()
+            if Index + 1 == len(FileLinesList):
+                FileLastLine = True
+                NextLine = ''
+            else:
+                NextLine = str(FileLinesList[Index + 1]).strip()
+            if UserExtFind and FindEnd == False:
+                if line:
+                    SectionData.append(line)
+            if line.lower().startswith(TAB_SECTION_START) and line.lower().endswith(TAB_SECTION_END):
+                SectionLine = line
+                UserExtFind = True
+                FindEnd = False
+            
+            if (NextLine != '' and NextLine[0] == TAB_SECTION_START and \
+                NextLine[-1] == TAB_SECTION_END) or FileLastLine:
+                UserExtFind = False
+                FindEnd = True
+                self._FileSectionDataList.append({SectionLine: SectionData[:]})
+                SectionData = []
+                SectionLine = ''
+    
+
+    # Get depex expresion
+    #
+    # @return: a list include some dictionary that key is section and value is a list contain all data.
+    def GetDepexExpresionList(self):
+        DepexExpresionList = []
+        if not self._FileSectionDataList:
+            return DepexExpresionList
+        for SectionDataDict in self._FileSectionDataList:
+            for key in SectionDataDict.keys():
+                if key.lower() == "[depex]" or key.lower().startswith("[depex."):
+                    SectionLine = key.lstrip(TAB_SECTION_START).rstrip(TAB_SECTION_END)
+                    SubSectionList = [SectionLine]
+                    if str(SectionLine).find(TAB_COMMA_SPLIT) > -1:
+                        SubSectionList = str(SectionLine).split(TAB_COMMA_SPLIT)
+                    for SubSection in SubSectionList:
+                        SectionList = SubSection.split(TAB_SPLIT)
+                        SubKey = ()
+                        if len(SectionList) == 1:
+                            SubKey = (TAB_ARCH_COMMON, TAB_ARCH_COMMON)
+                        elif len(SectionList) == 2:
+                            SubKey = (SectionList[1], TAB_ARCH_COMMON)
+                        elif len(SectionList) == 3:
+                            SubKey = (SectionList[1], SectionList[2])
+                        else:
+                            EdkLogger.error("build", AUTOGEN_ERROR, 'Section %s is invalid.' % key)
+                        DepexExpresionList.append({SubKey: SectionDataDict[key]})
+        return DepexExpresionList
+
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