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// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
// Copyright Joyent, Inc. and Node.js contributors. All rights reserved. MIT license.
// TODO(petamoriken): enable prefer-primordials for node polyfills
// deno-lint-ignore-file prefer-primordials
import { Buffer } from "node:buffer";
import {
validateEncoding,
validateInteger,
} from "ext:deno_node/internal/validators.mjs";
import * as io from "ext:deno_io/12_io.js";
import {
arrayBufferViewToUint8Array,
getValidatedFd,
validateOffsetLengthWrite,
validateStringAfterArrayBufferView,
} from "ext:deno_node/internal/fs/utils.mjs";
import { isArrayBufferView } from "ext:deno_node/internal/util/types.ts";
import { maybeCallback } from "ext:deno_node/_fs/_fs_common.ts";
import { op_fs_seek_async, op_fs_seek_sync } from "ext:core/ops";
export function writeSync(fd, buffer, offset, length, position) {
fd = getValidatedFd(fd);
const innerWriteSync = (fd, buffer, offset, length, position) => {
buffer = arrayBufferViewToUint8Array(buffer);
if (typeof position === "number") {
op_fs_seek_sync(fd, position, io.SeekMode.Start);
}
let currentOffset = offset;
const end = offset + length;
while (currentOffset - offset < length) {
currentOffset += io.writeSync(fd, buffer.subarray(currentOffset, end));
}
return currentOffset - offset;
};
if (isArrayBufferView(buffer)) {
if (position === undefined) {
position = null;
}
if (offset == null) {
offset = 0;
} else {
validateInteger(offset, "offset", 0);
}
if (typeof length !== "number") {
length = buffer.byteLength - offset;
}
validateOffsetLengthWrite(offset, length, buffer.byteLength);
return innerWriteSync(fd, buffer, offset, length, position);
}
validateStringAfterArrayBufferView(buffer, "buffer");
validateEncoding(buffer, length);
if (offset === undefined) {
offset = null;
}
buffer = Buffer.from(buffer, length);
return innerWriteSync(fd, buffer, 0, buffer.length, position);
}
/** Writes the buffer to the file of the given descriptor.
* https://nodejs.org/api/fs.html#fswritefd-buffer-offset-length-position-callback
* https://github.com/nodejs/node/blob/42ad4137aadda69c51e1df48eee9bc2e5cebca5c/lib/fs.js#L797
*/
export function write(fd, buffer, offset, length, position, callback) {
fd = getValidatedFd(fd);
const innerWrite = async (fd, buffer, offset, length, position) => {
buffer = arrayBufferViewToUint8Array(buffer);
if (typeof position === "number") {
await op_fs_seek_async(fd, position, io.SeekMode.Start);
}
let currentOffset = offset;
const end = offset + length;
while (currentOffset - offset < length) {
currentOffset += await io.write(
fd,
buffer.subarray(currentOffset, end),
);
}
return currentOffset - offset;
};
if (isArrayBufferView(buffer)) {
callback = maybeCallback(callback || position || length || offset);
if (offset == null || typeof offset === "function") {
offset = 0;
} else {
validateInteger(offset, "offset", 0);
}
if (typeof length !== "number") {
length = buffer.byteLength - offset;
}
if (typeof position !== "number") {
position = null;
}
validateOffsetLengthWrite(offset, length, buffer.byteLength);
innerWrite(fd, buffer, offset, length, position).then(
(nwritten) => {
callback(null, nwritten, buffer);
},
(err) => callback(err),
);
return;
}
// Here the call signature is
// `fs.write(fd, string[, position[, encoding]], callback)`
validateStringAfterArrayBufferView(buffer, "buffer");
if (typeof position !== "function") {
if (typeof offset === "function") {
position = offset;
offset = null;
} else {
position = length;
}
length = "utf-8";
}
const str = buffer;
validateEncoding(str, length);
callback = maybeCallback(position);
buffer = Buffer.from(str, length);
innerWrite(fd, buffer, 0, buffer.length, offset, callback).then(
(nwritten) => {
callback(null, nwritten, buffer);
},
(err) => callback(err),
);
}
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