BaseTools:ECC report errors on account of analyze special characters

BZ:https://bugzilla.tianocore.org/show_bug.cgi?id=1751

In case that a C function body contains the string of L'', L'\"',
L"\"", L''', L""", L"\"\"", L"\"^", L" \"", L"\" \"", ('L",\\\""')
ECC tool running under python3 interpreter will report error.
The antlr4 module misidentified this character

This patch is going to fix that issue.

Cc: Bob Feng <bob.c.feng@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Signed-off-by: Zhiju.Fan <zhijux.fan@intel.com>
Reviewed-by: Bob Feng <bob.c.feng@intel.com>

BaseTools/Source/Python/Ecc/CodeFragmentCollector.py

@@ -73,7 +73,7 @@ class CodeFragmentCollector:
         self.FileName = FileName
         self.CurrentLineNumber = 1
         self.CurrentOffsetWithinLine = 0
-
+        self.TokenReleaceList = []
         self.__Token = ""
         self.__SkippedChars = ""
 
@@ -503,6 +503,9 @@ class CodeFragmentCollector:
         FileStringContents = ''
         for fileLine in self.Profile.FileLinesList:
             FileStringContents += fileLine
+        for Token in self.TokenReleaceList:
+            if Token in FileStringContents:
+                FileStringContents = FileStringContents.replace(Token, 'TOKENSTRING')
         cStream = antlr.InputStream(FileStringContents)
         lexer = CLexer(cStream)
         tStream = antlr.CommonTokenStream(lexer)

BaseTools/Source/Python/Ecc/Configuration.py

@@ -114,6 +114,7 @@ _ConfigFileToInternalTranslation = {
     "SmmCommParaCheckBufferType":"SmmCommParaCheckBufferType",
     "SpaceCheckAll":"SpaceCheckAll",
     "SpellingCheckAll":"SpellingCheckAll",
+    "TokenReleaceList":"TokenReleaceList",
     "UniCheckAll":"UniCheckAll",
     "UniCheckHelpInfo":"UniCheckHelpInfo",
     "UniCheckPCDInfo":"UniCheckPCDInfo",
@@ -389,6 +390,8 @@ class Configuration(object):
         # A list for Copyright format
         self.Copyright = []
 
+        self.TokenReleaceList = []
+
         self.ParseConfig()
 
     def ParseConfig(self):
@@ -419,6 +422,8 @@ class Configuration(object):
                     List[1] = GetSplitValueList(List[1], TAB_COMMA_SPLIT)
                 if List[0] == 'Copyright':
                     List[1] = GetSplitValueList(List[1], TAB_COMMA_SPLIT)
+                if List[0] == 'TokenReleaceList':
+                    List[1] = GetSplitValueList(List[1], TAB_COMMA_SPLIT)
                 self.__dict__[_ConfigFileToInternalTranslation[List[0]]] = List[1]
 
     def ShowMe(self):

BaseTools/Source/Python/Ecc/c.py

@@ -495,6 +495,8 @@ def CollectSourceCodeDataIntoDB(RootDir):
     tuple = os.walk(RootDir)
     IgnoredPattern = GetIgnoredDirListPattern()
     ParseErrorFileList = []
+    TokenReleaceList = EccGlobalData.gConfig.TokenReleaceList
+    TokenReleaceList.extend(['L",\\\""'])
 
     for dirpath, dirnames, filenames in tuple:
         if IgnoredPattern.match(dirpath.upper()):
@@ -519,6 +521,7 @@ def CollectSourceCodeDataIntoDB(RootDir):
                 EdkLogger.info("Parsing " + FullName)
                 model = f.endswith('c') and DataClass.MODEL_FILE_C or DataClass.MODEL_FILE_H
                 collector = CodeFragmentCollector.CodeFragmentCollector(FullName)
+                collector.TokenReleaceList = TokenReleaceList
                 try:
                     collector.ParseFile()
                 except UnicodeError:

BaseTools/Source/Python/Ecc/config.ini

@@ -277,3 +277,5 @@ SmmCommParaCheckBufferType = 1
 BinaryExtList = EXE, EFI, FV, ROM, DLL, COM, BMP, GIF, PYD, CMP, BIN, JPG, UNI, RAW, COM2, LIB, DEPEX, SYS, DB
 # A list for only scanning dirs, the dirs should be the top folder(s) under workspace
 ScanOnlyDirList = ScanFolder1 ScanFolder2
+# A list for Used to circumvent special strings
+TokenReleaceList = L'', L'\"', L"\"", L''', L""", L"\"\"", L"\"^", L" \"", L"\" \""