byte-rw/dist/dataview/writer-chunked-dynamic.js

Byte reader/writer for buffers and streams in typescript/javascript

import { copy } from "../utils/copy.js";
import { DataViewByteWriterChunked } from "./writer-chunked.js";
export class DataViewByteWriterChunkedDynamic extends DataViewByteWriterChunked {
    combineChunks() {
        this.complete();
        const offsets = new Array(this.chunks.length + 1);
        offsets[0] = 0;
        for (let i = 1; i < offsets.length; i++)
            offsets[i] = offsets[i - 1] + this.chunks[i - 1].bytesWritten;
        const dst = new ArrayBuffer(offsets.pop());
        for (let i = 0; i < offsets.length; i++) {
            const chunk = this.chunks[i];
            copy({
                buffer: chunk.view.buffer,
                byteOffset: chunk.view.byteOffset,
                byteLength: chunk.bytesWritten
            }, {
                buffer: dst,
                byteOffset: offsets[i],
                byteLength: chunk.bytesWritten
            });
        }
        return dst;
    }
    constructor(littleEndian, defaultChunkSize = 4096) {
        super(littleEndian, defaultChunkSize);
        this.chunks = [];
    }
    save() {
        this.chunks.push({
            view: this._dataview,
            bytesWritten: this._byteOffset
        });
        return this._byteOffset;
    }
}