mirror of
https://github.com/denoland/deno.git
synced 2024-12-11 10:07:54 -05:00
86 lines
3 KiB
TypeScript
86 lines
3 KiB
TypeScript
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
|
|
// Copyright Joyent, Inc. and other Node contributors.
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a
|
|
// copy of this software and associated documentation files (the
|
|
// "Software"), to deal in the Software without restriction, including
|
|
// without limitation the rights to use, copy, modify, merge, publish,
|
|
// distribute, sublicense, and/or sell copies of the Software, and to permit
|
|
// persons to whom the Software is furnished to do so, subject to the
|
|
// following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included
|
|
// in all copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
|
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
|
|
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
|
|
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
|
|
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
|
|
// USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
|
|
// This module ports:
|
|
// - https://github.com/nodejs/node/blob/master/src/node_file-inl.h
|
|
// - https://github.com/nodejs/node/blob/master/src/node_file.cc
|
|
// - https://github.com/nodejs/node/blob/master/src/node_file.h
|
|
|
|
import { assert } from "ext:deno_node/_util/asserts.ts";
|
|
import * as io from "ext:deno_io/12_io.js";
|
|
import * as fs from "ext:deno_fs/30_fs.js";
|
|
|
|
/**
|
|
* Write to the given file from the given buffer synchronously.
|
|
*
|
|
* Implements sync part of WriteBuffer in src/node_file.cc
|
|
* See: https://github.com/nodejs/node/blob/e9ed113/src/node_file.cc#L1818
|
|
*
|
|
* @param fs file descriptor
|
|
* @param buffer the data to write
|
|
* @param offset where in the buffer to start from
|
|
* @param length how much to write
|
|
* @param position if integer, position to write at in the file. if null, write from the current position
|
|
* @param context context object for passing error number
|
|
*/
|
|
export function writeBuffer(
|
|
fd: number,
|
|
buffer: Uint8Array,
|
|
offset: number,
|
|
length: number,
|
|
position: number | null,
|
|
ctx: { errno?: number },
|
|
) {
|
|
assert(offset >= 0, "offset should be greater or equal to 0");
|
|
assert(
|
|
offset + length <= buffer.byteLength,
|
|
`buffer doesn't have enough data: byteLength = ${buffer.byteLength}, offset + length = ${
|
|
offset +
|
|
length
|
|
}`,
|
|
);
|
|
|
|
if (position) {
|
|
fs.seekSync(fd, position, io.SeekMode.Current);
|
|
}
|
|
|
|
const subarray = buffer.subarray(offset, offset + length);
|
|
|
|
try {
|
|
return io.writeSync(fd, subarray);
|
|
} catch (e) {
|
|
ctx.errno = extractOsErrorNumberFromErrorMessage(e);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
function extractOsErrorNumberFromErrorMessage(e: unknown): number {
|
|
const match = e instanceof Error
|
|
? e.message.match(/\(os error (\d+)\)/)
|
|
: false;
|
|
|
|
if (match) {
|
|
return +match[1];
|
|
}
|
|
|
|
return 255; // Unknown error
|
|
}
|