Borewit
21 lines
702 B
TypeScript
21 lines
702 B
TypeScript
import type {IRandomAccessTokenizer} from 'strtok3';
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import { latin1toString } from '@exodus/bytes/single-byte.js';
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export const endTag2 = 'LYRICS200';
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export async function getLyricsHeaderLength(tokenizer: IRandomAccessTokenizer): Promise<number> {
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const fileSize = tokenizer.fileInfo.size;
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if (fileSize >= 143) {
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const buf = new Uint8Array(15);
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const position = tokenizer.position;
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await tokenizer.readBuffer(buf, {position: fileSize - 143});
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tokenizer.setPosition(position); // Restore position
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const txt = latin1toString(buf);
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const tag = txt.substring(6);
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if (tag === endTag2) {
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return Number.parseInt(txt.substring(0, 6), 10) + 15;
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}
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}
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return 0;
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}
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