Borewit
27 lines
946 B
TypeScript
27 lines
946 B
TypeScript
import { IRandomReader } from '../type.js';
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/**
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* Provides abstract Uint8Array access via the IRandomRead interface
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*/
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export class RandomUint8ArrayReader implements IRandomReader {
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public readonly fileSize: number;
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constructor(private readonly uint8Array: Uint8Array) {
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this.fileSize = uint8Array.length;
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}
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/**
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* Read from a given position of an abstracted file or buffer.
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* @param uint8Array - Uint8Array that the data will be written to.
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* @param offset - Offset in the buffer to start writing at.
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* @param length - Integer specifying the number of bytes to read.
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* @param position - Specifies where to begin reading from in the file.
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* @return Promise providing bytes read
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*/
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public async randomRead(uint8Array: Uint8Array, offset: number, length: number, position: number): Promise<number> {
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uint8Array.set(this.uint8Array.subarray(position, position + length), offset);
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return length;
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}
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}
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