proteus-js-client/dist/frames/FrameHeaderFlyweight.js

Proteus JavaScript Client

/**
 * Copyright (c) 2017-present, Netifi Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * 
 */

'use strict';

/* eslint-disable consistent-return, no-bitwise */

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.encodeFrameHeader = encodeFrameHeader;
exports.getMajorVersion = getMajorVersion;
exports.getMinorVersion = getMinorVersion;
exports.getFrameType = getFrameType;


/**
 * Protocol Version
 */
var MAJOR_VERSION = exports.MAJOR_VERSION = 0;var MINOR_VERSION = exports.MINOR_VERSION = 1;

var MAJOR_VERSION_SIZE = exports.MAJOR_VERSION_SIZE = 2;
var MINOR_VERSION_SIZE = exports.MINOR_VERSION_SIZE = 2;
var FRAME_TYPE_SIZE = exports.FRAME_TYPE_SIZE = 2;

var FRAME_HEADER_SIZE = exports.FRAME_HEADER_SIZE = MAJOR_VERSION_SIZE + MINOR_VERSION_SIZE + FRAME_TYPE_SIZE;

function encodeFrameHeader(buffer, frame) {
  var offset = buffer.writeUInt16BE(frame.majorVersion || MAJOR_VERSION, 0);
  offset = buffer.writeUInt16BE(frame.minorVersion || MINOR_VERSION, offset);
  return buffer.writeUInt16BE(frame.type, offset);
}

function getMajorVersion(buffer) {
  return buffer.readUInt16BE(0);
}

function getMinorVersion(buffer) {
  return buffer.readUInt16BE(MAJOR_VERSION_SIZE);
}

function getFrameType(buffer) {
  return buffer.readUInt16BE(MAJOR_VERSION_SIZE + MINOR_VERSION_SIZE);
}