const lut = {
    b: { u: DataView.prototype.getInt8, p: DataView.prototype.setInt8, bytes: 1 },
    B: {
        u: DataView.prototype.getUint8,
        p: DataView.prototype.setUint8,
        bytes: 1,
    },
    h: {
        u: DataView.prototype.getInt16,
        p: DataView.prototype.setInt16,
        bytes: 2,
    },
    H: {
        u: DataView.prototype.getUint16,
        p: DataView.prototype.setUint16,
        bytes: 2,
    },
    i: {
        u: DataView.prototype.getInt32,
        p: DataView.prototype.setInt32,
        bytes: 4,
    },
    I: {
        u: DataView.prototype.getUint32,
        p: DataView.prototype.setUint32,
        bytes: 4,
    },
    q: {
        // @ts-ignore
        u: DataView.prototype.getInt64,
        // @ts-ignore
        p: DataView.prototype.setInt64,
        bytes: 8,
    },
    Q: {
        // @ts-ignore
        u: DataView.prototype.getUint64,
        // @ts-ignore
        p: DataView.prototype.setUint64,
        bytes: 8,
    },
};
export const pack = (format, ...data) => {
    let pointer = 0;
    if (format.replace(/[<>]/, "").length != data.length) {
        throw "Pack format to Argument count mismatch";
    }
    let bytes = [];
    let littleEndian = true;
    for (let i = 0; i < format.length; i++) {
        if (format[i] == "<") {
            littleEndian = true;
        }
        else if (format[i] == ">") {
            littleEndian = false;
        }
        else {
            pushBytes(format[i], data[pointer]);
            pointer++;
        }
    }
    function pushBytes(formatChar, value) {
        if (!(formatChar in lut)) {
            throw "Unhandled character '" + formatChar + "' in pack format";
        }
        let dataSize = lut[formatChar].bytes;
        let view = new DataView(new ArrayBuffer(dataSize));
        let dataViewFn = lut[formatChar].p.bind(view);
        dataViewFn(0, value, littleEndian);
        for (let i = 0; i < dataSize; i++) {
            bytes.push(view.getUint8(i));
        }
    }
    return bytes;
};
export const unpack = (format, bytes) => {
    let pointer = 0;
    let data = [];
    let littleEndian = true;
    for (let c of format) {
        if (c == "<") {
            littleEndian = true;
        }
        else if (c == ">") {
            littleEndian = false;
        }
        else {
            pushData(c);
        }
    }
    function pushData(formatChar) {
        if (!(formatChar in lut)) {
            throw "Unhandled character '" + formatChar + "' in unpack format";
        }
        let dataSize = lut[formatChar].bytes;
        let view = new DataView(new ArrayBuffer(dataSize));
        for (let i = 0; i < dataSize; i++) {
            view.setUint8(i, bytes[pointer + i] & 0xff);
        }
        let dataViewFn = lut[formatChar].u.bind(view);
        data.push(dataViewFn(0, littleEndian));
        pointer += dataSize;
    }
    return data;
};