From be591dbd382d3e647bf4b858333500cdfda2e7d5 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Jos=C3=A9=20Fonseca?= <jose.r.fonseca@gmail.com>
Date: Sun, 22 May 2011 00:37:12 +0100
Subject: [PATCH] Beginning of a Python reimplementation of tracediff script.

---
 scripts/snapdiff.py  |  4 ++
 scripts/tracediff.py | 96 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 100 insertions(+)
 create mode 100755 scripts/tracediff.py

diff --git a/scripts/snapdiff.py b/scripts/snapdiff.py
index 0e40419..6a31650 100755
--- a/scripts/snapdiff.py
+++ b/scripts/snapdiff.py
@@ -26,6 +26,10 @@
 ##########################################################################/
 
 
+'''Snapshot (image) comparison script.
+'''
+
+
 import sys
 import os.path
 import optparse
diff --git a/scripts/tracediff.py b/scripts/tracediff.py
new file mode 100755
index 0000000..4f13529
--- /dev/null
+++ b/scripts/tracediff.py
@@ -0,0 +1,96 @@
+#!/usr/bin/env python
+##########################################################################
+#
+# Copyright 2011 Jose Fonseca
+# All Rights Reserved.
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the 'Software'), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+#
+##########################################################################/
+
+
+import difflib
+import optparse
+import os.path
+import re
+import subprocess
+import sys
+
+
+call_re = re.compile('^([0-9]+) (\w+)\(')
+
+ansi_re = re.compile('\x1b\[[0-9]{1,2}(;[0-9]{1,2}){0,2}m')
+
+
+def ansi_strip(s):
+    # http://www.theeggeadventure.com/wikimedia/index.php/Linux_Tips#Use_sed_to_remove_ANSI_colors
+    return ansi_re.sub('', s)
+
+
+ignored_function_names = set([
+    'glGetString',
+    'glXGetClientString',
+    'glXGetCurrentDisplay',
+    'glXGetProcAddress',
+    'glXGetProcAddressARB',
+    'wglGetProcAddress',
+])
+
+
+def readtrace(trace):
+    p = subprocess.Popen([options.tracedump, trace], stdout=subprocess.PIPE)
+    lines = []
+    for line in p.stdout.readlines():
+        line = ansi_strip(line)
+        mo = call_re.match(line)
+        if mo:
+            function_name = mo.group(2)
+            if function_name in ignored_function_names:
+                continue
+            lines.append(line[mo.start(2):])
+        else:
+            lines[-1] += line
+    p.wait()
+    return lines
+
+
+def main():
+    global options
+
+    optparser = optparse.OptionParser(
+        usage='\n\t%prog <trace> <trace>',
+        version='%%prog')
+    optparser.add_option(
+        '-d', '--tracedump', metavar='PROGRAM',
+        type='string', dest='tracedump', default='tracedump',
+        help='tracedump command [default: %default]')
+
+    (options, args) = optparser.parse_args(sys.argv[1:])
+    if len(args) != 2:
+        optparser.error("incorrect number of arguments")
+
+    ref_lines = readtrace(args[0])
+    src_lines = readtrace(args[1])
+
+    diff = difflib.unified_diff(ref_lines, src_lines, n=3)
+    sys.stdout.writelines(diff)
+
+
+if __name__ == '__main__':
+    main()
-- 
2.43.0