42 lines
1.2 KiB
TypeScript
42 lines
1.2 KiB
TypeScript
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import { _decorator, Component, Node } from 'cc';
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const { ccclass, property } = _decorator;
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@ccclass('GlobalTool')
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export class GlobalTool {
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public static CrcDecode(data: Uint8Array, crc32: number): void {
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const num: number = 2175242257; // 2175242257L in hexadecimal
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const dataView = new DataView(
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data.buffer,
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data.byteOffset,
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data.byteLength
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);
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for (let i = 0; i < data.length; i += 4) {
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// Ensure we don't read beyond the end of the data
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if (i + 4 > data.length) break;
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// Read a 32-bit integer (little endian) from the buffer
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let anInt = dataView.getUint32(i, true);
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// Perform the XOR operations
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let val = anInt ^ num ^ crc32;
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// Rotate right 6 bits
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let jiemi = (val >>> 6) | (val << (32 - 6));
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// Write the result back into the buffer
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dataView.setUint32(i, jiemi, true);
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}
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}
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//字节数组转string
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public static uint8ArrayToString(data: Uint8Array, Code?: string): string {
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if (!Code) Code = 'utf-8';
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const decoder = new TextDecoder(Code); // 默认使用 'utf-8' 编码
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return decoder.decode(data);
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}
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}
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