BZ:https://bugzilla.tianocore.org/show_bug.cgi?id=1641

The command trim --asl-file -o test.i UTF8.asl will trig the exception.
Trim tool should report error message for unsupported UTF8 file instead
of the exception.

Cc: Bob Feng <bob.c.f...@intel.com>
Cc: Liming Gao <liming....@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Zhiju.Fan <zhijux....@intel.com>
---
 BaseTools/Source/Python/Trim/Trim.py | 44 +++++++++++++++++-------------------
 1 file changed, 21 insertions(+), 23 deletions(-)

diff --git a/BaseTools/Source/Python/Trim/Trim.py 
b/BaseTools/Source/Python/Trim/Trim.py
index 228779b5a9..05feab6abe 100644
--- a/BaseTools/Source/Python/Trim/Trim.py
+++ b/BaseTools/Source/Python/Trim/Trim.py
@@ -18,7 +18,7 @@ import Common.LongFilePathOs as os
 import sys
 import re
 from io import BytesIO
-
+import codecs
 from optparse import OptionParser
 from optparse import make_option
 from Common.BuildToolError import *
@@ -77,14 +77,11 @@ gIncludedAslFile = []
 def TrimPreprocessedFile(Source, Target, ConvertHex, TrimLong):
     CreateDirectory(os.path.dirname(Target))
     try:
-        f = open (Source, 'r')
+        with open(Source, "r") as File:
+            Lines = File.readlines()
     except:
         EdkLogger.error("Trim", FILE_OPEN_FAILURE, ExtraData=Source)
 
-    # read whole file
-    Lines = f.readlines()
-    f.close()
-
     PreprocessedFile = ""
     InjectedFile = ""
     LineIndexOfOriginalFile = None
@@ -181,11 +178,10 @@ def TrimPreprocessedFile(Source, Target, ConvertHex, 
TrimLong):
 
     # save to file
     try:
-        f = open (Target, 'w')
+        with open(Target, 'w') as File:
+            File.writelines(NewLines)
     except:
         EdkLogger.error("Trim", FILE_OPEN_FAILURE, ExtraData=Target)
-    f.writelines(NewLines)
-    f.close()
 
 ## Trim preprocessed VFR file
 #
@@ -199,12 +195,11 @@ def TrimPreprocessedVfr(Source, Target):
     CreateDirectory(os.path.dirname(Target))
 
     try:
-        f = open (Source, 'r')
+        with open(Source, "r") as File:
+            Lines = File.readlines()
     except:
         EdkLogger.error("Trim", FILE_OPEN_FAILURE, ExtraData=Source)
     # read whole file
-    Lines = f.readlines()
-    f.close()
 
     FoundTypedef = False
     Brace = 0
@@ -248,11 +243,10 @@ def TrimPreprocessedVfr(Source, Target):
 
     # save all lines trimmed
     try:
-        f = open (Target, 'w')
+        with open(Target, 'w') as File:
+            File.writelines(Lines)
     except:
         EdkLogger.error("Trim", FILE_OPEN_FAILURE, ExtraData=Target)
-    f.writelines(Lines)
-    f.close()
 
 ## Read the content  ASL file, including ASL included, recursively
 #
@@ -278,7 +272,12 @@ def DoInclude(Source, Indent='', IncludePathList=[], 
LocalSearchPath=None):
         for IncludePath in SearchPathList:
             IncludeFile = os.path.join(IncludePath, Source)
             if os.path.isfile(IncludeFile):
-                F = open(IncludeFile, "r")
+                try:
+                    with open(IncludeFile, "r") as File:
+                        F = File.readlines()
+                except:
+                    with codecs.open(IncludeFile, "r", encoding='utf-8') as 
File:
+                        F = File.readlines()
                 break
         else:
             EdkLogger.error("Trim", "Failed to find include file %s" % Source)
@@ -313,7 +312,6 @@ def DoInclude(Source, Indent='', IncludePathList=[], 
LocalSearchPath=None):
         NewFileContent.append("\n")
 
     gIncludedAslFile.pop()
-    F.close()
 
     return NewFileContent
 
@@ -345,7 +343,9 @@ def TrimAslFile(Source, Target, IncludePathFile):
     if IncludePathFile:
         try:
             LineNum = 0
-            for Line in open(IncludePathFile, 'r'):
+            with open(IncludePathFile, 'r') as File:
+                FileLines = File.readlines()
+            for Line in FileLines:
                 LineNum += 1
                 if Line.startswith("/I") or Line.startswith ("-I"):
                     IncludePathList.append(Line[2:].strip())
@@ -363,13 +363,11 @@ def TrimAslFile(Source, Target, IncludePathFile):
 
     # save all lines trimmed
     try:
-        f = open (Target, 'w')
+        with open(Target, 'w') as File:
+            File.writelines(Lines)
     except:
         EdkLogger.error("Trim", FILE_OPEN_FAILURE, ExtraData=Target)
 
-    f.writelines(Lines)
-    f.close()
-
 def GenerateVfrBinSec(ModuleName, DebugDir, OutputFile):
     VfrNameList = []
     if os.path.isdir(DebugDir):
@@ -389,7 +387,7 @@ def GenerateVfrBinSec(ModuleName, DebugDir, OutputFile):
         return
 
     try:
-        fInputfile = open(OutputFile, "wb+", 0)
+        fInputfile = open(OutputFile, "wb+")
     except:
         EdkLogger.error("Trim", FILE_OPEN_FAILURE, "File open failed for %s" 
%OutputFile, None)
 
-- 
2.14.1.windows.1

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