fix(dict): save/load forward_dimension and backward_dimension of Conn…

…ectionCosts to/from cc.dat binary

src/dict/ConnectionCosts.js

@@ -27,29 +27,32 @@
 function ConnectionCosts(forward_dimension, backward_dimension) {
     this.forward_dimension = forward_dimension;
     this.backward_dimension = backward_dimension;
-    this.buffer = new Int16Array(forward_dimension * backward_dimension);
+
+    // leading 2 integers for forward_dimension, backward_dimension, respectively
+    this.buffer = new Int16Array(forward_dimension * backward_dimension + 2);
+    this.buffer[0] = forward_dimension;
+    this.buffer[1] = backward_dimension;
 }
 
 ConnectionCosts.prototype.put = function (forward_id, backward_id, cost) {
-    var index = forward_id * this.backward_dimension + backward_id;
+    var index = forward_id * this.backward_dimension + backward_id + 2;
     if (this.buffer.length < index + 1) {
         throw "ConnectionCosts buffer overflow";
     }
     this.buffer[index] = cost;
 };
 
 ConnectionCosts.prototype.get = function (forward_id, backward_id) {
-    var index = forward_id * this.backward_dimension + backward_id;
+    var index = forward_id * this.backward_dimension + backward_id + 2;
     if (this.buffer.length < index + 1) {
         throw "ConnectionCosts buffer overflow";
     }
     return this.buffer[index];
 };
 
 ConnectionCosts.prototype.loadConnectionCosts = function (connection_costs_buffer) {
-    // TODO Read dimension from connection_costs_buffer
-    this.forward_dimension = 1316;
-    this.backward_dimension = 1316;
+    this.forward_dimension = connection_costs_buffer[0];
+    this.backward_dimension = connection_costs_buffer[1];
     this.buffer = connection_costs_buffer;
 };