Fix incorrect mantissa size for f64 conversions (#35)

Author: abelstuker

src/messaging/Message.ts

@@ -177,7 +177,7 @@ export namespace Message {
                     payload += WASM.leb128(arg.value);
                 } else {
                     const buff = Buffer.alloc(arg.type === Type.f32 ? 4 : 8);
-                    write(buff, arg.value, 0, true, 23, buff.length);
+                    write(buff, arg.value, 0, true, arg.type === Type.f32 ? 23 : 52, buff.length);
                     payload += buff.toString('hex');
                 }
             });

src/messaging/Parsers.ts

@@ -65,7 +65,7 @@ function stacking(objects: {value: any, type: any}[]): WASM.Value[] {
         const type: WASM.Type = WASM.typing.get(object.type.toLowerCase()) ?? WASM.Type.unknown;
         if (type === WASM.Type.f32 || type === WASM.Type.f64) {
             const buff = Buffer.from(object.value, 'hex');
-            value = ieee754.read(buff, 0, false, 23, buff.length);
+            value = ieee754.read(buff, 0, false, type === WASM.Type.f32 ? 23 : 52, buff.length);
         }
         stacked.push({value: value, type: type});
     }