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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,135 +1,53 @@ | ||
| import from2 from 'from2'; | ||
| import isPromise from 'p-is-promise'; | ||
| import {Readable as ReadableStream} from 'node:stream'; | ||
| import {Buffer} from 'node:buffer'; | ||
|
|
||
| export default function intoStream(input) { | ||
| if (Array.isArray(input)) { | ||
| input = input.slice(); | ||
| } | ||
|
|
||
| let promise; | ||
| let iterator; | ||
| let asyncIterator; | ||
| function baseIntoStream(isObjectMode, input) { | ||
| async function * reader() { | ||
| let value = await input; | ||
|
|
||
| prepare(input); | ||
| if (!value) { | ||
| return; | ||
| } | ||
|
|
||
| function prepare(value) { | ||
| input = value; | ||
| if (Array.isArray(value)) { | ||
| value = [...value]; | ||
| } | ||
|
|
||
| if ( | ||
| input instanceof ArrayBuffer || | ||
| (ArrayBuffer.isView(input) && !Buffer.isBuffer(input)) | ||
| !isObjectMode | ||
| && ( | ||
| value instanceof ArrayBuffer | ||
| || (ArrayBuffer.isView(value) && !Buffer.isBuffer(value)) | ||
| ) | ||
| ) { | ||
| input = Buffer.from(input); | ||
| value = Buffer.from(value); | ||
| } | ||
|
|
||
| promise = isPromise(input) ? input : null; | ||
|
|
||
| // We don't iterate on strings and buffers since slicing them is ~7x faster | ||
| const shouldIterate = !promise && input[Symbol.iterator] && typeof input !== 'string' && !Buffer.isBuffer(input); | ||
| iterator = shouldIterate ? input[Symbol.iterator]() : null; | ||
|
|
||
| const shouldAsyncIterate = !promise && input[Symbol.asyncIterator]; | ||
| asyncIterator = shouldAsyncIterate ? input[Symbol.asyncIterator]() : null; | ||
| } | ||
|
|
||
| return from2(function reader(size, callback) { | ||
| if (promise) { | ||
| (async () => { | ||
| try { | ||
| await prepare(await promise); | ||
| reader.call(this, size, callback); | ||
| } catch (error) { | ||
| callback(error); | ||
| } | ||
| })(); | ||
|
|
||
| return; | ||
| } | ||
| // We don't iterate on strings and buffers since yielding them is ~7x faster. | ||
| if (typeof value !== 'string' && !Buffer.isBuffer(value) && value?.[Symbol.iterator]) { | ||
| for (const element of value) { | ||
| yield element; | ||
| } | ||
|
|
||
| if (iterator) { | ||
| const object = iterator.next(); | ||
| setImmediate(callback, null, object.done ? null : object.value); | ||
| return; | ||
| } | ||
|
|
||
| if (asyncIterator) { | ||
| (async () => { | ||
| try { | ||
| const object = await asyncIterator.next(); | ||
| setImmediate(callback, null, object.done ? null : object.value); | ||
| } catch (error) { | ||
| setImmediate(callback, error); | ||
| } | ||
| })(); | ||
| if (value?.[Symbol.asyncIterator]) { | ||
| for await (const element of value) { | ||
| yield await element; | ||
| } | ||
|
|
||
| return; | ||
| } | ||
|
|
||
| if (input.length === 0) { | ||
| setImmediate(callback, null, null); | ||
| return; | ||
| } | ||
|
|
||
| const chunk = input.slice(0, size); | ||
| input = input.slice(size); | ||
|
|
||
| setImmediate(callback, null, chunk); | ||
| }); | ||
| } | ||
|
|
||
| intoStream.object = input => { | ||
| if (Array.isArray(input)) { | ||
| input = input.slice(); | ||
| } | ||
|
|
||
| let promise; | ||
| let iterator; | ||
| let asyncIterator; | ||
|
|
||
| prepare(input); | ||
|
|
||
| function prepare(value) { | ||
| input = value; | ||
| promise = isPromise(input) ? input : null; | ||
| iterator = !promise && input[Symbol.iterator] ? input[Symbol.iterator]() : null; | ||
| asyncIterator = !promise && input[Symbol.asyncIterator] ? input[Symbol.asyncIterator]() : null; | ||
| yield value; | ||
| } | ||
|
|
||
| return from2.obj(function reader(size, callback) { | ||
| if (promise) { | ||
| (async () => { | ||
| try { | ||
| await prepare(await promise); | ||
| reader.call(this, size, callback); | ||
| } catch (error) { | ||
| callback(error); | ||
| } | ||
| })(); | ||
|
|
||
| return; | ||
| } | ||
|
|
||
| if (iterator) { | ||
| const object = iterator.next(); | ||
| setImmediate(callback, null, object.done ? null : object.value); | ||
| return; | ||
| } | ||
|
|
||
| if (asyncIterator) { | ||
| (async () => { | ||
| try { | ||
| const object = await asyncIterator.next(); | ||
| setImmediate(callback, null, object.done ? null : object.value); | ||
| } catch (error) { | ||
| setImmediate(callback, error); | ||
| } | ||
| })(); | ||
| return ReadableStream.from(reader(), {objectMode: isObjectMode}); | ||
| } | ||
|
|
||
| return; | ||
| } | ||
| const intoStream = baseIntoStream.bind(undefined, false); | ||
|
|
||
| this.push(input); | ||
| export default intoStream; | ||
|
|
||
| setImmediate(callback, null, null); | ||
| }); | ||
| }; | ||
| intoStream.object = baseIntoStream.bind(undefined, true); |
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