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fs: add read(buffer[, options]) versions #42768

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Merged
aduh95 merged 16 commits into from
May 2, 2022
Merged

fs: add read(buffer[, options]) versions #42768

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c69abaa
fs: add read(buffer, options) signatures
LiviaMedeiros Apr 15, 2022
aec64ca
squash: make offsetOrOptions more consistent
LiviaMedeiros Apr 17, 2022
42c9c40
squash: add doc entries
LiviaMedeiros Apr 17, 2022
71f03ce
squash: fix fs.read()
LiviaMedeiros Apr 17, 2022
0bd9de7
squash: expand fs-read-optional test
LiviaMedeiros Apr 17, 2022
abd6e4f
squash: expand fs-read-promises-optional test
LiviaMedeiros Apr 17, 2022
9826309
squash: improve tests
LiviaMedeiros Apr 18, 2022
a32c914
squash: fixup
LiviaMedeiros Apr 18, 2022
6a974c2
squash: fixup
LiviaMedeiros Apr 18, 2022
0f586d2
squash: inline null coalescing
LiviaMedeiros Apr 18, 2022
6410dec
squash: revert changes in fs.readSync()
LiviaMedeiros Apr 19, 2022
ccaa4cb
squash: disallow offset === false
LiviaMedeiros Apr 19, 2022
0e6b06a
squash: fixup
LiviaMedeiros Apr 21, 2022
42b640c
squash: allow offset === null
LiviaMedeiros Apr 21, 2022
e153143
squash: fix tests being other way round
LiviaMedeiros Apr 21, 2022
ab0b534
squash: adjust tests
LiviaMedeiros Apr 22, 2022
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squash: fix fs.read()
  • Loading branch information
@LiviaMedeiros
LiviaMedeiros committed Apr 17, 2022
commit 71f03ce69ebe2b4bc9e98d449db120e8153af504
40 changes: 19 additions & 21 deletions lib/fs.js
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Original file line number Diff line number Diff line change
Expand Up @@ -136,6 +136,7 @@ const {
validateEncoding,
validateFunction,
validateInteger,
validateObject,
validateString,
} = require('internal/validators');

Expand Down Expand Up @@ -609,35 +610,32 @@ function read(fd, buffer, offsetOrOptions, length, position, callback) {
fd = getValidatedFd(fd);

let offset = offsetOrOptions;
if (
arguments.length === 4 &&
(offsetOrOptions === undefined || typeof offsetOrOptions === 'object')
) {
// This is fs.read(fd, buffer, options, callback)
callback = length;
({
offset = 0,
length = buffer.byteLength - offset,
position = null
} = offsetOrOptions ?? ObjectCreate(null));
} else if (arguments.length <= 3) {
// Assume fs.read(fd[, params], callback)
let params = ObjectCreate(null);
if (arguments.length < 3) {
let params = null;
if (arguments.length <= 4) {
if (arguments.length === 4) {
// This is fs.read(fd, buffer, options, callback)
validateObject(offsetOrOptions, 'options', { nullable: true });
callback = length;
params = offsetOrOptions;
} else if (arguments.length === 3) {
// This is fs.read(fd, bufferOrParams, callback)
if (!isArrayBufferView(buffer)) {
// This is fs.read(fd, params, callback)
params = buffer;
({ buffer = Buffer.alloc(16384) } = params ?? ObjectCreate(null));
}
callback = offsetOrOptions;
} else {
// This is fs.read(fd, callback)
callback = buffer;
} else {
// This is fs.read(fd, params, callback)
params = buffer;
callback = offset;
buffer = Buffer.alloc(16384);
}

({
buffer = Buffer.alloc(16384),
offset = 0,
length = buffer.byteLength - offset,
position = null
} = params);
} = params ?? ObjectCreate(null));
}

validateBuffer(buffer);
Expand Down