1 files changed, 68 insertions, 0 deletions
diff --git a/build-aux/vcstocl/misc_util.py b/build-aux/vcstocl/misc_util.py
new file mode 100644
index 0000000000..f023080e87
--- /dev/null
+++ b/build-aux/vcstocl/misc_util.py
@@ -0,0 +1,68 @@
+# General Utility functions.
+# Copyright (C) 2019 Free Software Foundation, Inc.
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+import sys
+import os
+
+class DebugUtil:
+    debug = False
+    def __init__(self, debug):
+        self.debug = debug
+
+    def eprint(self, *args, **kwargs):
+        ''' Print to stderr.
+        '''
+        print(*args, file=sys.stderr, **kwargs)
+
+
+    def print(self, *args, **kwargs):
+        ''' Convenience function to print diagnostic information in the program.
+        '''
+        if self.debug:
+            self.eprint(*args, **kwargs)
+
+
+def decode(string):
+    ''' Attempt to decode a string.
+
+    Decode a string read from the source file.  The multiple attempts are needed
+    due to the presence of the page break characters and some tests in locales.
+    '''
+    codecs = ['utf8', 'cp1252']
+
+    for i in codecs:
+        try:
+            return string.decode(i)
+        except UnicodeDecodeError:
+            pass
+
+    DebugUtil.eprint('Failed to decode: %s' % string)
+
+
+def analyze_diff(filename, oldfile, newfile, frontends):
+    ''' Parse the output of the old and new files and print the difference.
+
+    For input files OLDFILE and NEWFILE with name FILENAME, generate reduced
+    trees for them and compare them.  We limit our comparison to only C source
+    files.
+    '''
+    name, ext = os.path.splitext(filename)
+
+    if not ext in frontends.keys():
+        return None
+    else:
+        frontend = frontends[ext]
+        frontend.compare(oldfile, newfile)