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// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.// Copyright Joyent, Inc. and Node.js contributors. All rights reserved. MIT license.import { Buffer } from "../buffer.ts";import { validateEncoding, validateInteger } from "../internal/validators.mjs";import {  getValidatedFd,  showStringCoercionDeprecation,  validateOffsetLengthWrite,  validateStringAfterArrayBufferView,} from "../internal/fs/utils.mjs";import { isArrayBufferView } from "../internal/util/types.ts";import { maybeCallback } from "./_fs_common.ts";
export function writeSync(fd, buffer, offset, length, position) {  fd = getValidatedFd(fd);
  const innerWriteSync = (fd, buffer, offset, length, position) => {    if (buffer instanceof DataView) {      buffer = new Uint8Array(buffer.buffer);    }    if (typeof position === "number") {      Deno.seekSync(fd, position, Deno.SeekMode.Start);    }    let currentOffset = offset;    const end = offset + length;    while (currentOffset - offset < length) {      currentOffset += Deno.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) => {    if (buffer instanceof DataView) {      buffer = new Uint8Array(buffer.buffer);    }    if (typeof position === "number") {      await Deno.seek(fd, position, Deno.SeekMode.Start);    }    let currentOffset = offset;    const end = offset + length;    while (currentOffset - offset < length) {      currentOffset += await Deno.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 buffer !== "string") {    showStringCoercionDeprecation();  }
  if (typeof position !== "function") {    if (typeof offset === "function") {      position = offset;      offset = null;    } else {      position = length;    }    length = "utf-8";  }
  const str = String(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),  );}