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https://github.com/denoland/deno.git
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d47147fb6a
This commit moves "deno_std/node" in "ext/node" crate. The code is transpiled and snapshotted during the build process. During the first pass a minimal amount of work was done to create the snapshot, a lot of code in "ext/node" depends on presence of "Deno" global. This code will be gradually fixed in the follow up PRs to migrate it to import relevant APIs from "internal:" modules. Currently the code from snapshot is not used in any way, and all Node/npm compatibility still uses code from "https://deno.land/std/node" (or from the location specified by "DENO_NODE_COMPAT_URL"). This will also be handled in a follow up PRs. --------- Co-authored-by: crowlkats <crowlkats@toaxl.com> Co-authored-by: Divy Srivastava <dj.srivastava23@gmail.com> Co-authored-by: Yoshiya Hinosawa <stibium121@gmail.com>
132 lines
4.1 KiB
JavaScript
132 lines
4.1 KiB
JavaScript
// Copyright 2018-2023 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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import { Buffer } from "internal:deno_node/polyfills/buffer.ts";
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import { validateEncoding, validateInteger } from "internal:deno_node/polyfills/internal/validators.mjs";
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import {
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getValidatedFd,
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showStringCoercionDeprecation,
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validateOffsetLengthWrite,
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validateStringAfterArrayBufferView,
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} from "internal:deno_node/polyfills/internal/fs/utils.mjs";
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import { isArrayBufferView } from "internal:deno_node/polyfills/internal/util/types.ts";
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import { maybeCallback } from "internal:deno_node/polyfills/_fs/_fs_common.ts";
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export function writeSync(fd, buffer, offset, length, position) {
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fd = getValidatedFd(fd);
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const innerWriteSync = (fd, buffer, offset, length, position) => {
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if (buffer instanceof DataView) {
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buffer = new Uint8Array(buffer.buffer);
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}
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if (typeof position === "number") {
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Deno.seekSync(fd, position, Deno.SeekMode.Start);
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}
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let currentOffset = offset;
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const end = offset + length;
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while (currentOffset - offset < length) {
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currentOffset += Deno.writeSync(fd, buffer.subarray(currentOffset, end));
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}
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return currentOffset - offset;
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};
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if (isArrayBufferView(buffer)) {
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if (position === undefined) {
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position = null;
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}
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if (offset == null) {
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offset = 0;
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} else {
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validateInteger(offset, "offset", 0);
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}
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if (typeof length !== "number") {
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length = buffer.byteLength - offset;
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}
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validateOffsetLengthWrite(offset, length, buffer.byteLength);
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return innerWriteSync(fd, buffer, offset, length, position);
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}
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validateStringAfterArrayBufferView(buffer, "buffer");
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validateEncoding(buffer, length);
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if (offset === undefined) {
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offset = null;
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}
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buffer = Buffer.from(buffer, length);
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return innerWriteSync(fd, buffer, 0, buffer.length, position);
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}
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/** Writes the buffer to the file of the given descriptor.
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* https://nodejs.org/api/fs.html#fswritefd-buffer-offset-length-position-callback
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* https://github.com/nodejs/node/blob/42ad4137aadda69c51e1df48eee9bc2e5cebca5c/lib/fs.js#L797
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*/
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export function write(fd, buffer, offset, length, position, callback) {
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fd = getValidatedFd(fd);
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const innerWrite = async (fd, buffer, offset, length, position) => {
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if (buffer instanceof DataView) {
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buffer = new Uint8Array(buffer.buffer);
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}
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if (typeof position === "number") {
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await Deno.seek(fd, position, Deno.SeekMode.Start);
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}
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let currentOffset = offset;
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const end = offset + length;
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while (currentOffset - offset < length) {
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currentOffset += await Deno.write(
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fd,
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buffer.subarray(currentOffset, end),
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);
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}
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return currentOffset - offset;
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};
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if (isArrayBufferView(buffer)) {
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callback = maybeCallback(callback || position || length || offset);
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if (offset == null || typeof offset === "function") {
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offset = 0;
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} else {
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validateInteger(offset, "offset", 0);
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}
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if (typeof length !== "number") {
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length = buffer.byteLength - offset;
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}
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if (typeof position !== "number") {
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position = null;
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}
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validateOffsetLengthWrite(offset, length, buffer.byteLength);
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innerWrite(fd, buffer, offset, length, position).then(
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(nwritten) => {
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callback(null, nwritten, buffer);
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},
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(err) => callback(err),
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);
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return;
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}
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// Here the call signature is
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// `fs.write(fd, string[, position[, encoding]], callback)`
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validateStringAfterArrayBufferView(buffer, "buffer");
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if (typeof buffer !== "string") {
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showStringCoercionDeprecation();
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}
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if (typeof position !== "function") {
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if (typeof offset === "function") {
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position = offset;
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offset = null;
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} else {
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position = length;
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}
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length = "utf-8";
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}
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const str = String(buffer);
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validateEncoding(str, length);
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callback = maybeCallback(position);
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buffer = Buffer.from(str, length);
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innerWrite(fd, buffer, 0, buffer.length, offset, callback).then(
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(nwritten) => {
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callback(null, nwritten, buffer);
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},
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(err) => callback(err),
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);
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}
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