Add a tool to compare the binsizes of plugins and codecs of 2 build dirs

Doesn't handle IRAM (yet)
Synopsys: ./cmp-plugins-size build1 build2

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26428 a1c6a512-1295-4272-9138-f99709370657

utils/analysis/cmp-plugins-size.py

@@ -0,0 +1,159 @@
+#!/usr/bin/python
+# -*- coding: utf8 -*-
+#             __________               __   ___.
+#   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+#   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+#   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+#   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+#                     \/            \/     \/    \/            \/
+#
+# Copyright © 2010 Rafaël Carré <rafael.carre@gmail>
+#
+# 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 2
+# of the License, or (at your option) any later version.
+#
+# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+# KIND, either express or implied.
+#
+
+# TODO: iram
+
+import sys
+import os
+import re
+import stat
+import fnmatch
+
+
+def percent_diff(old, new):
+    if old == 0:
+        return '?'
+    diff = 100.0*(new-old)/old
+    return format(diff, '+2.2f') + '%'
+
+
+def find_map(dir):
+    dirs = []
+    for file in os.listdir(dir):
+        path = os.path.join(dir, file)
+        if stat.S_ISDIR(os.stat(path).st_mode) != 0:
+            dirs += find_map(path)
+        elif fnmatch.fnmatch(file, '*.map'):
+            dirs += [path]
+    return dirs
+
+
+def rb_version(dir):
+    info = os.path.join(dir, 'rockbox-info.txt')
+    if not os.path.lexists(info):
+        return 'unknown'
+    info = open(info).read()
+    s = re.search('^Version: .*', info, re.MULTILINE)
+    if not s:
+        return 'unknown'
+    return re.sub('^Version: ', '', info[s.start():s.end()])
+
+
+def map_info(map):
+    file = os.path.basename(map)
+    name = file.rsplit('.map', 1)[0]
+
+    # ignore ape-pre map, used to fill IRAM
+    if name == 'ape-pre':
+        return None
+
+    # ignore overlays
+    ovlmap = os.path.join(os.path.dirname(map), name, file)
+    if os.path.lexists(ovlmap):
+        return None
+
+    f = open(map).read() # read map content
+
+    s = re.search('^PLUGIN_RAM *0x(\d|[abcdef])*', f, re.MULTILINE)
+    plugin_start = re.sub('^PLUGIN_RAM *0x0*', '', f[s.start():s.end()])
+
+    s = re.search('^\.pluginend *0x(\d|[abcdef])*', f, re.MULTILINE)
+    plugin_end   = re.sub('^\.pluginend *0x0*', '', f[s.start():s.end()])
+
+    size = int(plugin_end, 16) - int(plugin_start, 16)
+    return (name, size)
+
+
+def get_new(oldinfo, newinfo, name):
+    i = 0
+    while i < len(oldinfo) and i < len(newinfo):
+        if newinfo[i][0] == name:
+            return newinfo[i]
+        i += 1
+    return None
+
+
+def compare(olddir, newdir, oldver, newer):
+    oldinfo = []
+    for map in find_map(olddir):
+        info = map_info(map)
+        if info:
+            oldinfo += [info]
+
+    newinfo = []
+    for map in find_map(newdir):
+        info = map_info(map)
+        if info:
+            newinfo += [info]
+
+    oldinfo.sort()
+    newinfo.sort()
+
+    diff = []
+    longest_name = 0
+    for (name, old_size) in oldinfo:
+        new = get_new(oldinfo, newinfo, name)
+        if not new:
+            continue
+        (name, new_size) = new
+        if len(name) > longest_name:
+            longest_name = len(name)
+        diff += [(name, new_size - old_size, old_size)]
+
+    spacelen = (longest_name + 3)
+
+    print(' ' * spacelen + oldver + '\t\t' + newver + '\n')
+
+    for (name, diff, old_size) in diff:
+        space = ' ' * (longest_name - len(name) + 3)
+        new_size = old_size + diff
+        pdiff = percent_diff(old_size, new_size)
+        diff = str(diff)
+        if diff[0] != '-':
+            diff = '+' + diff
+
+        print(name + space + str(old_size) + '\t' + diff + \
+            '\t=\t' + str(new_size) + '\t-->\t' + pdiff)
+
+
+
+
+### main
+
+
+if len(sys.argv) != 3:
+    print('Usage: ' + sys.argv[0] + ' build-old build-new')
+    sys.exit(1)
+
+oldver = rb_version(sys.argv[1])
+newver = rb_version(sys.argv[2])
+
+oldplugindir = sys.argv[1] + '/apps/plugins'
+newplugindir = sys.argv[2] + '/apps/plugins'
+oldcodecsdir = sys.argv[1] + '/apps/codecs'
+newcodecsdir = sys.argv[2] + '/apps/codecs'
+
+if os.path.lexists(oldplugindir) and os.path.lexists(newplugindir):
+    compare(oldplugindir, newplugindir, oldver, newver)
+
+print('\n\n\n')
+
+if os.path.lexists(oldcodecsdir) and os.path.lexists(newcodecsdir):
+    compare(oldcodecsdir, newcodecsdir, oldver, newver)