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c73b4a0877
Towards #22079
87 lines
2.6 KiB
JavaScript
87 lines
2.6 KiB
JavaScript
// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
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// Copyright Joyent, Inc. and Node.js contributors. All rights reserved. MIT license.
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// TODO(petamoriken): enable prefer-primordials for node polyfills
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// deno-lint-ignore-file prefer-primordials
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import { Buffer } from "node:buffer";
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import { validateBufferArray } from "ext:deno_node/internal/fs/utils.mjs";
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import { getValidatedFd } from "ext:deno_node/internal/fs/utils.mjs";
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import { maybeCallback } from "ext:deno_node/_fs/_fs_common.ts";
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import * as io from "ext:deno_io/12_io.js";
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import { op_fs_seek_async, op_fs_seek_sync } from "ext:core/ops";
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export function writev(fd, buffers, position, callback) {
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const innerWritev = async (fd, buffers, position) => {
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const chunks = [];
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const offset = 0;
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for (let i = 0; i < buffers.length; i++) {
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if (Buffer.isBuffer(buffers[i])) {
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chunks.push(buffers[i]);
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} else {
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chunks.push(Buffer.from(buffers[i]));
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}
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}
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if (typeof position === "number") {
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await op_fs_seek_async(fd, position, io.SeekMode.Start);
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}
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const buffer = Buffer.concat(chunks);
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let currentOffset = 0;
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while (currentOffset < buffer.byteLength) {
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currentOffset += await io.writeSync(fd, buffer.subarray(currentOffset));
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}
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return currentOffset - offset;
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};
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fd = getValidatedFd(fd);
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validateBufferArray(buffers);
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callback = maybeCallback(callback || position);
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if (buffers.length === 0) {
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process.nextTick(callback, null, 0, buffers);
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return;
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}
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if (typeof position !== "number") position = null;
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innerWritev(fd, buffers, position).then(
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(nwritten) => {
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callback(null, nwritten, buffers);
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},
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(err) => callback(err),
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);
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}
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export function writevSync(fd, buffers, position) {
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const innerWritev = (fd, buffers, position) => {
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const chunks = [];
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const offset = 0;
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for (let i = 0; i < buffers.length; i++) {
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if (Buffer.isBuffer(buffers[i])) {
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chunks.push(buffers[i]);
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} else {
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chunks.push(Buffer.from(buffers[i]));
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}
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}
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if (typeof position === "number") {
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op_fs_seek_sync(fd, position, io.SeekMode.Start);
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}
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const buffer = Buffer.concat(chunks);
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let currentOffset = 0;
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while (currentOffset < buffer.byteLength) {
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currentOffset += io.writeSync(fd, buffer.subarray(currentOffset));
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}
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return currentOffset - offset;
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};
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fd = getValidatedFd(fd);
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validateBufferArray(buffers);
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if (buffers.length === 0) {
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return 0;
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}
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if (typeof position !== "number") position = null;
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return innerWritev(fd, buffers, position);
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}
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