@minecraft/creator-tools/core/DataUtilities.js

Minecraft Creator Tools command line and libraries.

"use strict";
// Copyright (c) Microsoft Corporation.
// Licensed under the MIT License.
Object.defineProperty(exports, "__esModule", { value: true });
class DataUtilities {
    static getUnsignedInteger(num1, num2, num3, num4, littleEndian) {
        const buffer = new ArrayBuffer(4);
        const bytes = new Uint8Array(buffer);
        bytes[0] = num1;
        bytes[1] = num2;
        bytes[2] = num3;
        bytes[3] = num4;
        const view = new DataView(buffer);
        return view.getUint32(0, littleEndian);
    }
    static writeUnsignedInteger(data, index, value, littleEndian) {
        const view = new DataView(data.buffer, index, 4);
        view.setUint32(0, value, littleEndian);
    }
    static getSignedByte(num) {
        const buffer = new ArrayBuffer(1);
        const bytes = new Uint8Array(buffer);
        bytes[0] = num;
        const view = new DataView(buffer);
        return view.getInt8(0);
    }
    static getFloat(num1, num2, num3, num4, littleEndian) {
        const buffer = new ArrayBuffer(4);
        const bytes = new Uint8Array(buffer);
        bytes[0] = num1;
        bytes[1] = num2;
        bytes[2] = num3;
        bytes[3] = num4;
        const view = new DataView(buffer);
        return view.getFloat32(0, littleEndian);
    }
    static getSignedLong(num1, num2, num3, num4, num5, num6, num7, num8, littleEndian) {
        const buffer = new ArrayBuffer(8);
        const bytes = new Uint8Array(buffer);
        bytes[0] = num1;
        bytes[1] = num2;
        bytes[2] = num3;
        bytes[3] = num4;
        bytes[4] = num5;
        bytes[5] = num6;
        bytes[6] = num7;
        bytes[7] = num8;
        const view = new DataView(buffer);
        return view.getBigInt64(0, littleEndian);
    }
    static getVarInt(data, index) {
        // most significant group first?
        let bytesRead = 0;
        let result = 0;
        let currentByte = 0;
        do {
            currentByte = data[index];
            const currentByteVal = currentByte & 0b01111111;
            result |= currentByteVal << (7 * bytesRead);
            bytesRead++;
            if (bytesRead > 5) {
                throw new Error("VarInt is unexpectedly large");
            }
        } while ((currentByte & 0b10000000) !== 0);
        return {
            value: result,
            bytesRead: bytesRead,
        };
    }
    static getSignedShort(num1, num2, littleEndian) {
        const buffer = new ArrayBuffer(2);
        const bytes = new Uint8Array(buffer);
        bytes[0] = num1;
        bytes[1] = num2;
        const view = new DataView(buffer);
        return view.getInt16(0, littleEndian);
    }
    static getUnsignedShort(num1, num2, littleEndian) {
        const buffer = new ArrayBuffer(2);
        const bytes = new Uint8Array(buffer);
        bytes[0] = num1;
        bytes[1] = num2;
        const view = new DataView(buffer);
        return view.getUint16(0, littleEndian);
    }
    static getSignedInteger(num1, num2, num3, num4, littleEndian) {
        const buffer = new ArrayBuffer(4);
        const bytes = new Uint8Array(buffer);
        bytes[0] = num1;
        bytes[1] = num2;
        bytes[2] = num3;
        bytes[3] = num4;
        const view = new DataView(buffer);
        return view.getInt32(0, littleEndian);
    }
}
exports.default = DataUtilities;

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