From a0109c229e77372300487c31cd51e92fc59403c7 Mon Sep 17 00:00:00 2001
From: Ilya Zverev <zverik@textual.ru>
Date: Wed, 27 Jan 2016 15:41:31 +0300
Subject: [PATCH] More mwm magic

---
 tools/python/mwm/dump_mwm.py | 16 ++++++++++++----
 tools/python/mwm/mwm.py      |  9 ++++++++-
 2 files changed, 20 insertions(+), 5 deletions(-)

diff --git a/tools/python/mwm/dump_mwm.py b/tools/python/mwm/dump_mwm.py
index bc86ba53cd..828303d6ad 100755
--- a/tools/python/mwm/dump_mwm.py
+++ b/tools/python/mwm/dump_mwm.py
@@ -1,6 +1,5 @@
 #!/usr/bin/python
-import sys, os.path
-import itertools
+import sys, os.path, random
 from mwm import MWM
 
 if len(sys.argv) < 2:
@@ -16,9 +15,18 @@ for tag, value in mwm.tags.iteritems():
 print 'Version:', mwm.read_version()
 print 'Header:', mwm.read_header()
 print 'Metadata count:', len(mwm.read_metadata())
+
 cross = mwm.read_crossmwm()
 if cross:
   print 'Outgoing points:', len(cross['out']), 'incoming:', len(cross['in'])
   print 'Outgoing regions:', set(cross['neighbours'])
-for feature in itertools.islice(mwm.iter_features(), 10):
-  print feature
+
+print 'Sample features:'
+count = 5
+probability = 1.0 / 1000
+for feature in mwm.iter_features():
+  if random.random() < probability:
+    print feature
+    count -= 1
+    if count <= 0:
+      break
diff --git a/tools/python/mwm/mwm.py b/tools/python/mwm/mwm.py
index 1ad6851331..af40135add 100644
--- a/tools/python/mwm/mwm.py
+++ b/tools/python/mwm/mwm.py
@@ -2,10 +2,17 @@
 import struct
 import math
 
-# Unprocessed sections: geomN, trgN, idx, sdx (search index), addr (search address), offs (feature offsets), dat (!)
+# Unprocessed sections: geomN, trgN, idx, sdx (search index), addr (search address), offs (feature offsets - succinct)
 # Routing sections: mercedes (matrix), daewoo (edge data), infinity (edge id), skoda (shortcuts), chrysler (cross context), ftseg, node2ftseg
 # (these mostly are succinct structures, except chrysler and node2ftseg, so no use trying to load them here)
 
+# TODO:
+# - Fix bounds reading in the header
+# - Fix delta point encoding (coords are plausible, but incorrect)
+# - Find why polygon geometry is incorrect in iter_features()
+# - Multilang string reading
+# - Find feature ids in the 'dat' section, or find a way to read the 'offs' section
+
 class MWM:
   languages = ["default",
     "en", "ja", "fr", "ko_rm", "ar", "de", "int_name", "ru", "sv", "zh", "fi", "be", "ka", "ko",