fs: make params in writing methods optional

This change allows passing objects as "named parameters":
- `fs.write(fd, buffer[, options], callback)`
- `fs.writeSync(fd, buffer[, options])`
- `filehandle.write(buffer[, options])`

Fixes: https://github.com/nodejs/node/issues/41666

PR-URL: https://github.com/nodejs/node/pull/42601
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: Minwoo Jung <nodecorelab@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

1 files changed, 29 insertions, 8 deletions

diff --git a/lib/fs.js b/lib/fs.js
index 3b29f985e5..69198c7811 100644
--- a/lib/fs.js
+++ b/lib/fs.js
@@ -634,7 +634,7 @@ function read(fd, buffer, offsetOrOptions, length, position, callback) {
     ({
       offset = 0,
       length = buffer.byteLength - offset,
-      position = null
+      position = null,
     } = params ?? ObjectCreate(null));
   }
 
@@ -705,7 +705,7 @@ function readSync(fd, buffer, offset, length, position) {
     ({
       offset = 0,
       length = buffer.byteLength - offset,
-      position = null
+      position = null,
     } = options);
   }
 
@@ -801,7 +801,7 @@ function readvSync(fd, buffers, position) {
  * Writes `buffer` to the specified `fd` (file descriptor).
  * @param {number} fd
  * @param {Buffer | TypedArray | DataView | string | object} buffer
- * @param {number} [offset]
+ * @param {number | object} [offsetOrOptions]
  * @param {number} [length]
  * @param {number | null} [position]
  * @param {(
@@ -811,7 +811,7 @@ function readvSync(fd, buffers, position) {
  *   ) => any} callback
  * @returns {void}
  */
-function write(fd, buffer, offset, length, position, callback) {
+function write(fd, buffer, offsetOrOptions, length, position, callback) {
   function wrapper(err, written) {
     // Retain a reference to buffer so that it can't be GC'ed too soon.
     callback(err, written || 0, buffer);
@@ -819,8 +819,18 @@ function write(fd, buffer, offset, length, position, callback) {
 
   fd = getValidatedFd(fd);
 
+  let offset = offsetOrOptions;
   if (isArrayBufferView(buffer)) {
     callback = maybeCallback(callback || position || length || offset);
+
+    if (typeof offset === 'object') {
+      ({
+        offset = 0,
+        length = buffer.byteLength - offset,
+        position = null,
+      } = offsetOrOptions ?? ObjectCreate(null));
+    }
+
     if (offset == null || typeof offset === 'function') {
       offset = 0;
     } else {
@@ -869,16 +879,27 @@ ObjectDefineProperty(write, internalUtil.customPromisifyArgs,
  * specified `fd` (file descriptor).
  * @param {number} fd
  * @param {Buffer | TypedArray | DataView | string} buffer
- * @param {number} [offset]
- * @param {number} [length]
- * @param {number | null} [position]
+ * @param {{
+ *   offset?: number;
+ *   length?: number;
+ *   position?: number | null;
+ *   }} [offsetOrOptions]
  * @returns {number}
  */
-function writeSync(fd, buffer, offset, length, position) {
+function writeSync(fd, buffer, offsetOrOptions, length, position) {
   fd = getValidatedFd(fd);
   const ctx = {};
   let result;
+
+  let offset = offsetOrOptions;
   if (isArrayBufferView(buffer)) {
+    if (typeof offset === 'object') {
+      ({
+        offset = 0,
+        length = buffer.byteLength - offset,
+        position = null
+      } = offsetOrOptions ?? ObjectCreate(null));
+    }
     if (position === undefined)
       position = null;
     if (offset == null) {