1 files changed, 113 insertions, 0 deletions
diff --git a/src/map/struct/map_tile.erl.m4 b/src/map/struct/map_tile.erl.m4
new file mode 100644
index 0000000..95757e6
--- /dev/null
+++ b/src/map/struct/map_tile.erl.m4
@@ -0,0 +1,113 @@
+-module(map_tile).
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% TYPES %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+-record
+(
+   tile,
+   {
+      id :: class_id(),
+      name :: binary(),
+      cost :: non_neg_integer()
+   }
+).
+
+-opaque class_id() :: non_neg_integer().
+-opaque instance() :: (
+   {class_id(), class_id(), non_neg_integer()}
+   | non_neg_integer()
+).
+
+-opaque type() :: #tile{}.
+
+-export_type([type/0, class_id/0, instance/0]).
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% EXPORTS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+-export
+(
+   [
+      get_class_id/1,
+      get_name/1,
+      get_cost/1,
+      from_class_id/1,
+      cost_when_oob/0
+   ]
+).
+
+-export
+(
+   [
+      instance_to_int_list/1,
+      instance_from_ints/1
+   ]
+).
+
+-export
+(
+   [
+      extract_main_class_id/1,
+      extract_border_class_id/1,
+      extract_variant_ix/1
+   ]
+).
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% LOCAL FUNCTIONS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%% EXPORTED FUNCTIONS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+-spec extract_main_class_id (instance()) -> class_id().
+extract_main_class_id (M) when is_integer(M) ->
+   M;
+extract_main_class_id ({M, _, _}) ->
+   M.
+
+-spec extract_border_class_id (instance()) -> class_id().
+extract_border_class_id (M) when is_integer(M) ->
+   M;
+extract_border_class_id ({_, B, _}) ->
+   B.
+
+-spec extract_variant_ix (instance()) -> non_neg_integer().
+extract_variant_ix (M) when is_integer(M) ->
+   0;
+extract_variant_ix ({_, _, V}) ->
+   V.
+
+-spec from_class_id (class_id()) -> type().
+m4_include(__MAKEFILE_DATA_DIR/tile/global.m4.conf)m4_dnl
+__TILE_CLASS_USE_ERLANG_STYLE
+m4_include(__MAKEFILE_DATA_DIR/tile/grassland.m4d)m4_dnl
+from_class_id(_) ->
+   from_class_id(0).
+
+-spec cost_when_oob () -> non_neg_integer().
+cost_when_oob () -> __TILE_COST_WHEN_OOB.
+
+-spec get_class_id (type()) -> non_neg_integer().
+get_class_id (Tile) -> Tile#tile.id.
+
+-spec get_cost (type()) -> non_neg_integer().
+get_cost (Tile) -> Tile#tile.cost.
+
+-spec get_name (type()) -> binary().
+get_name (Tile) -> Tile#tile.name.
+
+-spec instance_from_ints
+   (
+      {non_neg_integer(), non_neg_integer(), non_neg_integer()}
+   ) -> instance().
+instance_from_ints ({M, B, V}) ->
+   case (M == B) of
+      true -> M;
+      _ -> {M, B, V}
+   end.
+
+-spec instance_to_int_list (instance()) -> list(non_neg_integer()).
+instance_to_int_list (M) when is_integer(M) -> [M];
+instance_to_int_list ({M, B, V}) -> [M, B, V].