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fs: extract start and end check into checkPosition

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PR-URL: https://github.com/nodejs/node/pull/25264
Reviewed-By: Weijia Wang <starkwang@126.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
This commit is contained in:
ZYSzys 2018-12-29 16:30:19 +08:00 committed by Anna Henningsen
parent 519a11b24f
commit 98ed23cfaa
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GPG Key ID: 9C63F3A6CD2AD8F9
1 changed files with 15 additions and 28 deletions
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43
lib/internal/fs/streams.js
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@ -36,6 +36,19 @@ function allocNewPool(poolSize) {
pool.used = 0;
}
// Check the `this.start` and `this.end` of stream.
function checkPosition(pos, name) {
if (!Number.isSafeInteger(pos)) {
validateNumber(pos, name);
if (!Number.isInteger(pos))
throw new ERR_OUT_OF_RANGE(name, 'an integer', pos);
throw new ERR_OUT_OF_RANGE(name, '>= 0 and <= 2 ** 53 - 1', pos);
}
if (pos < 0) {
throw new ERR_OUT_OF_RANGE(name, '>= 0 and <= 2 ** 53 - 1', pos);
}
}
function ReadStream(path, options) {
if (!(this instanceof ReadStream))
return new ReadStream(path, options);
@ -64,23 +77,7 @@ function ReadStream(path, options) {
this.closed = false;
if (this.start !== undefined) {
if (!Number.isSafeInteger(this.start)) {
validateNumber(this.start, 'start');
if (!Number.isInteger(this.start))
throw new ERR_OUT_OF_RANGE('start', 'an integer', this.start);
throw new ERR_OUT_OF_RANGE(
'start',
'>= 0 and <= 2 ** 53 - 1',
this.start
);
}
if (this.start < 0) {
throw new ERR_OUT_OF_RANGE(
'start',
'>= 0 and <= 2 ** 53 - 1',
this.start
);
}
checkPosition(this.start, 'start');
this.pos = this.start;
}
@ -88,17 +85,7 @@ function ReadStream(path, options) {
if (this.end === undefined) {
this.end = Infinity;
} else if (this.end !== Infinity) {
if (!Number.isSafeInteger(this.end)) {
if (typeof this.end !== 'number')
throw new ERR_INVALID_ARG_TYPE('end', 'number', this.end);
if (!Number.isInteger(this.end))
throw new ERR_OUT_OF_RANGE('end', 'an integer', this.end);
throw new ERR_OUT_OF_RANGE('end', '>= 0 and <= 2 ** 53 - 1', this.end);
}
if (this.end < 0) {
throw new ERR_OUT_OF_RANGE('end', '>= 0 and <= 2 ** 53 - 1', this.end);
}
checkPosition(this.end, 'end');
if (this.start !== undefined && this.start > this.end) {
throw new ERR_OUT_OF_RANGE(