helper.js

module.exports = {
    toUInt32: toUInt32,
    toUInt32_: toUInt32_,
    MAKELONGLONG_: MAKELONGLONG_,
    MAKELONG_: MAKELONG_,
    MAKEWORD_: MAKEWORD_,
    LOWORD_: LOWORD_,
    HIWORD_: HIWORD_,
    LOBYTE_: LOBYTE_,
    HIBYTE_: HIBYTE_
};

function toUInt32(sval) {
    var buffer = new Buffer(4);
    buffer.writeInt32LE(sval, 0);
    var usigned = buffer.readUInt32LE(0);
    return usigned;
}

function toUInt32_(sval) {
    var buffer = new Buffer(5);
    buffer.writeUInt32LE(sval, 0);
    var usigned = buffer.readUInt32LE(0);
    return usigned;
}

function MAKELONGLONG_(a, b) {
    var longlong = ((b << 32) | a);
    var buffer = new Buffer(8);
    buffer.writeInt64LE(longlong, 0);
    longlong = buffer.readUInt64LE(0);
    return longlong;
}

function MAKELONG_(a, b) {
    var long = ((b << 16) | a);
    var buffer = new Buffer(4);
    buffer.writeInt32LE(long, 0);
    long = buffer.readUInt32LE(0);
    return long;
}

function MAKEWORD_(a, b) {
    var word = ((b << 8) | a);
    var buffer = new Buffer(2);
    buffer.writeInt16LE(word, 0);
    word = buffer.readUInt16LE(0);
    return word;
}

function LOWORD_(a) {
    a = a & 0xffff;
    var buffer = new Buffer(2);
    buffer.writeUInt16LE(a, 0);
    a = buffer.readUInt16LE(0);
    return a;
}

function HIWORD_(a) {
    a = (a >>> 16) & 0xffff;
    return a;
}

function LOBYTE_(a) {
    a = a & 0xff;
    return a;
}

function HIBYTE_(a) {
    a = ((a >>> 8) & 0xff);
    return a;
}