add c func and data

sim/compiled_sim.c

@@ -144,8 +144,10 @@ void sim_gate_set_port(struct Gate* gate, int port, int state) {
 }
 
 int sim_gate_get_data(struct Gate* gate, int addr) {
+	assert(addr>=0 && addr<gate->data_size);
 	return gate->data[addr];
 }
 void sim_gate_set_data(struct Gate* gate, int addr, int val) {
+	assert(addr>=0 && addr<gate->data_size);
 	gate->data[addr] = val;
 }