rename some variables and begin compiled sim c code

sim/compile.lua

@@ -3,34 +3,7 @@ local ffi = FFI or require("ffi")
 Simulation = Simulation or {}
 
 ffi.cdef[[
-	struct Wire {
-		int objref;
-		int layer;
-		struct Net* group;
-		int bounds[6];
-	};
 	
-	struct Port {
-		bool state;
-		char type;
-		struct Gate* gate;
-		struct Net* group;
-	};
-	
-	struct Gate {
-		int logic_ref;
-		bool in_queue;
-		struct Port ports[?];
-	};
-	
-	struct Net {
-		bool state;
-		bool in_queue;
-		int updatetick;
-		int state_num;
-		int num_gates_update;
-		struct Gate* gates_update[?];
-	};
 ]]
 
 function Simulation.compile(sim)

sim/compiled_sim.c

@@ -0,0 +1,7 @@
+
+void sim_init(int num_gates, int num_nets);
+void sim_add_gate();
+void sim_add_net();
+void sim_tick();
+void sim_get_net_state(int objref);
+void sim_get_port_state(int objref, int index);

sim/gate.lua

@@ -60,7 +60,7 @@ function Gate.queue(gate, delay)
 end
 
 function Gate.gettick(gate)
-	return GSim.currenttick
+	return GSim.current_tick
 end
 
 function Gate.getdefinition(gate)

sim/group.lua

@@ -5,7 +5,7 @@ function Group.new()
 	local o = {
 		state = false,
 		fxstate = false,
-		updatetick = 0,
+		update_tick = 0,
 		wires = {},
 		out_ports = {},
 		in_ports = {},
@@ -179,7 +179,7 @@ function Group.setstate(group, state)
 		local sim = GSim
 		
 		group.state = state
-		group.updatetick = sim.currenttick
+		group.update_tick = sim.current_tick
 		
 		for k, gate in ipairs(group.gates_update) do
 			Simulation.queuegate(sim, gate)

sim/port.lua

@@ -38,14 +38,14 @@ function Port.isrising(port)
 	if port.group == nil then
 		return false
 	end
-	return port.group.state and (port.group.updatetick == GSim.currenttick)
+	return port.group.state and (port.group.update_tick == GSim.current_tick)
 end
 
 function Port.isfalling(port)
 	if port.group == nil then
 		return false
 	end
-	return port.group.state == false and (port.updatetick == GSim.currenttick)
+	return port.group.state == false and (port.group.update_tick == GSim.current_tick)
 end
 
 function Port.getgate(port)

sim/simulation.lua

@@ -23,7 +23,7 @@ function Simulation.new(sim)
 		
 		callbacks = nil,
 		
-		currenttick = 0
+		current_tick = 0,
 	}
 	setmetatable(o, sim)
 	sim.__index = sim
@@ -245,7 +245,7 @@ function Simulation.queuegate(sim, gate)
 end
 
 function Simulation.queuegatelater(sim, gate, delay)
-	local tick = sim.currenttick + delay
+	local tick = sim.current_tick + delay
 	if sim.tickqueue[tick] == nil then
 		sim.tickqueue[tick] = {}
 	end
@@ -322,11 +322,11 @@ function Simulation.tick(sim)
 		sim.inputqueue_nonempty = false
 	end
 	
-	if sim.tickqueue[sim.currenttick] ~= nil then
-		for i, gate in pairs(sim.tickqueue[sim.currenttick]) do
+	if sim.tickqueue[sim.current_tick] ~= nil then
+		for i, gate in pairs(sim.tickqueue[sim.current_tick]) do
 			Simulation.queuegate(sim, gate)
 		end
-		sim.tickqueue[sim.currenttick] = nil
+		sim.tickqueue[sim.current_tick] = nil
 	end
 	
 	for k, gate in ipairs(sim.gatequeue) do
@@ -335,7 +335,7 @@ function Simulation.tick(sim)
 	end
 	sim.gatequeue = {}
 	
-	sim.currenttick = sim.currenttick + 1
+	sim.current_tick = sim.current_tick + 1
 end
 
 function Simulation.sendfxupdate(sim)