csgo/helpers/VDF.js

var ByteBuffer = require('bytebuffer');


var Type = {
    None: 0,
    String: 1,
    Int32: 2,
    Float32: 3,
    Pointer: 4,
    WideString: 5,
    Color: 6,
    UInt64: 7,
    End: 8,
};

exports.decode = function(buffer) {
    var object = {};
    if(typeof(buffer.readUint8) != "function"){
        buffer = ByteBuffer.wrap(buffer);
    }
    if(buffer.offset != buffer.limit) {
        while (true) {
            var type = buffer.readUint8();

            if (type == Type.End)
                break;

            var name = buffer.readCString();

            switch (type) {
                case Type.None:
                    object[name] = exports.decode(buffer);
                    break;

                case Type.String:
                    object[name] = buffer.readCString();
                    break;

                case Type.Int32:
                case Type.Color:
                case Type.Pointer:
                    object[name] = buffer.readInt32();
                    break;

                case Type.UInt64:
                    object[name] = buffer.readUint64();
                    break;

                case Type.Float32:
                    object[name] = buffer.readFloat();
                    break;
            }
        }
    }

    return object;
};

function _encode(object, buffer, name){
    switch (typeof object) {
        case 'object':
            buffer.writeByte(Type.None);
            buffer.writeCString(name);
            for (var index in object) {
                _encode(object[index], buffer, index);
            }
            buffer.writeByte(Type.End);
            break;
        case 'string':
            buffer.writeByte(Type.String);
            buffer.writeCString(name);
            buffer.writeCString(object ? object : null);
            break;
        case 'number':
            buffer.writeByte(Type.String);
            buffer.writeCString(name);
            buffer.writeCString(object.toString());
            break;
    }
} 
exports.encode = function(object){
    if(!buffer){
        var buffer = new ByteBuffer();
    }
    for(var item in object){
        if(object.hasOwnProperty(item)) {
            _encode(object[item], buffer, item);
        }
    }
    buffer.writeByte(Type.End);
    buffer.flip();
    return buffer;
};