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85ab4a5f12
Several changes:
* Soft-Deprecate Buffer() constructors
* Add `Buffer.from()`, `Buffer.alloc()`, and `Buffer.allocUnsafe()`
* Add `--zero-fill-buffers` command line option
* Add byteOffset and length to `new Buffer(arrayBuffer)` constructor
* buffer.fill('') previously had no effect, now zero-fills
* Update the docs
PR-URL: https://github.com/nodejs/node/pull/4682
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>
Reviewed-By: Stephen Belanger <admin@stephenbelanger.com>
60 lines
1.2 KiB
JavaScript
60 lines
1.2 KiB
JavaScript
'use strict';
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require('../common');
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var assert = require('assert');
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// If everything aligns so that you do a read(n) of exactly the
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// remaining buffer, then make sure that 'end' still emits.
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var READSIZE = 100;
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var PUSHSIZE = 20;
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var PUSHCOUNT = 1000;
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var HWM = 50;
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var Readable = require('stream').Readable;
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var r = new Readable({
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highWaterMark: HWM
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});
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var rs = r._readableState;
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r._read = push;
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r.on('readable', function() {
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console.error('>> readable');
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do {
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console.error(' > read(%d)', READSIZE);
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var ret = r.read(READSIZE);
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console.error(' < %j (%d remain)', ret && ret.length, rs.length);
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} while (ret && ret.length === READSIZE);
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console.error('<< after read()',
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ret && ret.length,
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rs.needReadable,
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rs.length);
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});
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var endEmitted = false;
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r.on('end', function() {
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endEmitted = true;
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console.error('end');
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});
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var pushes = 0;
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function push() {
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if (pushes > PUSHCOUNT)
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return;
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if (pushes++ === PUSHCOUNT) {
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console.error(' push(EOF)');
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return r.push(null);
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}
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console.error(' push #%d', pushes);
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if (r.push(Buffer.allocUnsafe(PUSHSIZE)))
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setTimeout(push);
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}
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process.on('exit', function() {
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assert.equal(pushes, PUSHCOUNT + 1);
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assert(endEmitted);
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});
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