25 lines
895 B
TypeScript
25 lines
895 B
TypeScript
import type { BytesLike } from './BytesLike.js';
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export function convertBytesLikeToArrayBuffer(data: BytesLike, encodeUTF8 = true): ArrayBuffer {
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if (data instanceof ArrayBuffer) {
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return data;
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}
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if (data instanceof Uint8Array) {
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if (data.byteOffset === 0 && data.byteLength === data.buffer.byteLength && data.buffer instanceof ArrayBuffer) {
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return data.buffer;
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}
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return data.slice().buffer;
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}
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if (data instanceof DataView) {
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const view = new Uint8Array(data.buffer, data.byteOffset, data.byteLength);
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return view.slice().buffer;
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}
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if (typeof data === 'string') {
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if (encodeUTF8) {
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return new TextEncoder().encode(data).buffer;
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}
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return new Uint8Array(data.split('').map((s) => s.codePointAt(0) as number)).buffer;
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}
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throw new Error('Unsupported BytesLike');
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}
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