Fix python3 compability issue in clang binding

The file contents could be of str type. Should use byte length instead
of str length, otherwise utf-8 encoded files may not get properly parsed
for completion.

Source issue: https://github.com/ncm2/ncm2-pyclang#2

Commited on behalf of `roxma'

Differential Revision: https://reviews.llvm.org/D56429

llvm-svn: 352039

clang/bindings/python/clang/cindex.py

@@ -2814,9 +2814,9 @@ def from_source(cls, filename, args=None, unsaved_files=None, options=0,
             for i, (name, contents) in enumerate(unsaved_files):
                 if hasattr(contents, "read"):
                     contents = contents.read()
-
+                contents = b(contents)
                 unsaved_array[i].name = b(fspath(name))
-                unsaved_array[i].contents = b(contents)
+                unsaved_array[i].contents = contents
                 unsaved_array[i].length = len(contents)
 
         ptr = conf.lib.clang_parseTranslationUnit(index,
@@ -2993,17 +2993,13 @@ def reparse(self, unsaved_files=None, options=0):
         unsaved_files_array = 0
         if len(unsaved_files):
             unsaved_files_array = (_CXUnsavedFile * len(unsaved_files))()
-            for i,(name,value) in enumerate(unsaved_files):
-                if not isinstance(value, str):
-                    # FIXME: It would be great to support an efficient version
-                    # of this, one day.
-                    value = value.read()
-                    print(value)
-                if not isinstance(value, str):
-                    raise TypeError('Unexpected unsaved file contents.')
-                unsaved_files_array[i].name = fspath(name)
-                unsaved_files_array[i].contents = value
-                unsaved_files_array[i].length = len(value)
+            for i,(name,contents) in enumerate(unsaved_files):
+                if hasattr(contents, "read"):
+                    contents = contents.read()
+                contents = b(contents)
+                unsaved_files_array[i].name = b(fspath(name))
+                unsaved_files_array[i].contents = contents
+                unsaved_files_array[i].length = len(contents)
         ptr = conf.lib.clang_reparseTranslationUnit(self, len(unsaved_files),
                 unsaved_files_array, options)
 
@@ -3057,17 +3053,13 @@ def codeComplete(self, path, line, column, unsaved_files=None,
         unsaved_files_array = 0
         if len(unsaved_files):
             unsaved_files_array = (_CXUnsavedFile * len(unsaved_files))()
-            for i,(name,value) in enumerate(unsaved_files):
-                if not isinstance(value, str):
-                    # FIXME: It would be great to support an efficient version
-                    # of this, one day.
-                    value = value.read()
-                    print(value)
-                if not isinstance(value, str):
-                    raise TypeError('Unexpected unsaved file contents.')
+            for i,(name,contents) in enumerate(unsaved_files):
+                if hasattr(contents, "read"):
+                    contents = contents.read()
+                contents = b(contents)
                 unsaved_files_array[i].name = b(fspath(name))
-                unsaved_files_array[i].contents = b(value)
-                unsaved_files_array[i].length = len(value)
+                unsaved_files_array[i].contents = contents
+                unsaved_files_array[i].length = len(contents)
         ptr = conf.lib.clang_codeCompleteAt(self, fspath(path), line, column,
                 unsaved_files_array, len(unsaved_files), options)
         if ptr: