lua: eliminate TagCache.set_tag()

profiles/car.lua

@@ -236,8 +236,10 @@ function node_function (node, result)
 end
 
 -- abort early if this way is obviouslt not routable
-function handle_initial_check(way,result,cache)
+function handle_initial_check(way,result,cache,data)
-  return TagCache.get(way,cache,'highway') ~= nil or
+  data.speed_type = TagCache.get(way,cache,'highway')
+
+  return data.speed_type ~= nil or
          TagCache.get(way,cache,'route') ~= nil or
          TagCache.get(way,cache,'bridge') ~= nil
 end
@@ -371,7 +373,6 @@ function handle_ferries(way,result,cache)
   local route = TagCache.get(way,cache,"route")
   local route_speed = speed_profile[route]
   if (route_speed and route_speed > 0) then
-   TagCache.set(cache,"highway",route)
    local duration  = TagCache.get(way,cache,"duration")
    if duration and durationIsValid(duration) then
      result.duration = max( parseDuration(duration), 1 )
@@ -389,7 +390,6 @@ function handle_movables(way,result,cache)
   local bridge_speed = speed_profile[bridge]
   local capacity_car = TagCache.get(way,cache,"capacity:car")
   if (bridge_speed and bridge_speed > 0) and (capacity_car ~= 0) then
-    TagCache.set(cache,"highway",bridge)
     local duration  = TagCache.get(way,cache,"duration")
     if duration and durationIsValid(duration) then
       result.duration = max( parseDuration(duration), 1 )
@@ -690,7 +690,7 @@ function way_function(way, result)
   -- most steps can abort processing, meaning the way
   -- is not routable  
   
-  if handle_initial_check(way,result,cache) == false then return end
+  if handle_initial_check(way,result,cache,data) == false then return end
   if handle_default_mode(way,result,cache) == false then return end
   if handle_blocking(way,result,cache) == false then return end
   if handle_access(way,result,cache,data) == false then return end

profiles/lib/tag_cache.lua

@@ -24,12 +24,4 @@ function TagCache.get(way,cache,key)
   end
 end
 
-function TagCache.set(cache,key,value)
-  if value then
-    cache[key] = value
-  else
-    cache[key] = ''
-  end    
-end
-
 return TagCache

profiles/test.lua

@@ -0,0 +1,97 @@
+-- Enable calling our lua profile code directly from the lua command line,
+-- which makes it easier to debug.
+-- We simulate the normal C++ environment by defining the required globals and functions.
+
+-- Usage:
+-- > cd profiles
+-- > lua5.1 debug.lua
+
+
+-- for more convenient printing of tables
+local pprint = require('lib/pprint')
+
+-- globals that are normally set from C++
+
+-- profiles code modifies this table
+properties = {}
+
+-- should match values defined in include/extractor/guidance/road_classification.hpp
+road_priority_class = {
+  motorway = 0,
+  trunk = 2,
+  primary = 4,
+  secondary = 6,
+  tertiary = 8,
+  main_residential = 10,
+  side_residential = 11,
+  link_road = 14,
+  bike_path = 16,
+  foot_path = 18,
+  connectivity = 31,
+}
+
+-- should match values defined in include/extractor/travel_mode.hpp
+mode = {
+  inaccessible = 0,
+  driving = 1,
+  cycling = 2,
+  walking = 3,
+  ferry = 4,
+  train = 5,
+  pushing_bike = 6,
+}
+
+-- input tags, normally extracted from OSM data
+local way = {
+  highway = 'primary',
+  name = 'Main Street',
+  --width = '3',
+  --maxspeed = '30',
+  --['maxspeed:advisory'] = '25',
+  --oneway = '-1',
+  --service = 'alley',
+  --['oneway:bicycle'] = 'yes',
+  --junction = 'roundabout',
+  --['name:pronunciation'] = 'fuerloong',
+  --route = 'ferry',
+  --duration = '00:01:00',
+  --hov = 'designated',
+  --access = 'no'
+}
+-- tag function normally provided via C++
+function way:get_value_by_key(k)
+  return self[k]
+end
+
+-- Mock C++ helper functions which are called from LUA.
+-- FIXME
+-- Debugging LUA code that uses these will not work correctly
+-- unless we reimplement themethods in LUA.
+
+function durationIsValid(str)
+  return true
+end
+
+function parseDuration(str)
+  return 1
+end
+
+function canonicalizeStringList(str)
+  return str
+end
+ 
+-- start state of result table, normally set form C++
+local result = {
+  road_classification = {},
+  forward_speed = -1,
+  backward_speed = -1,
+}
+
+-- the profile we want to debug
+require("car")
+
+-- call the way function
+for i=0,10000,1
+do
+  way_function(way,result)
+end