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fs: extract out validateOffsetLengthRead function

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PR-URL: https://github.com/nodejs/node/pull/17682
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Anatoli Papirovski <apapirovski@mac.com>
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
This commit is contained in:
Jon Moss 2017-12-13 17:29:03 -05:00 committed by Joyee Cheung
parent b9b8294dda
commit fc8c1b1ded
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1 changed files with 17 additions and 10 deletions
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27
lib/fs.js
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@ -165,6 +165,21 @@ function validateFd(fd) {
}
}
function validateOffsetLengthRead(offset, length, bufferLength) {
let err;
if (offset < 0 || offset >= bufferLength) {
err = new errors.RangeError('ERR_OUT_OF_RANGE', 'offset');
} else if (length < 0 || offset + length > bufferLength) {
err = new errors.RangeError('ERR_OUT_OF_RANGE', 'length');
}
if (err !== undefined) {
Error.captureStackTrace(err, validateOffsetLengthRead);
throw err;
}
}
// Special case of `makeCallback()` that is specific to async `*stat()` calls as
// an optimization, since the data passed back to the callback needs to be
// transformed anyway.
@ -743,11 +758,7 @@ fs.read = function(fd, buffer, offset, length, position, callback) {
});
}
if (offset < 0 || offset >= buffer.length)
throw new errors.RangeError('ERR_OUT_OF_RANGE', 'offset');
if (length < 0 || offset + length > buffer.length)
throw new errors.RangeError('ERR_OUT_OF_RANGE', 'length');
validateOffsetLengthRead(offset, length, buffer.length);
if (!isUint32(position))
position = -1;
@ -779,11 +790,7 @@ fs.readSync = function(fd, buffer, offset, length, position) {
return 0;
}
if (offset < 0 || offset >= buffer.length)
throw new errors.RangeError('ERR_OUT_OF_RANGE', 'offset');
if (length < 0 || offset + length > buffer.length)
throw new errors.RangeError('ERR_OUT_OF_RANGE', 'length');
validateOffsetLengthRead(offset, length, buffer.length);
if (!isUint32(position))
position = -1;