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// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
var events = require('events');
var util = require('util');
function Stream() {
events.EventEmitter.call(this);
}
util.inherits(Stream, events.EventEmitter);
exports.Stream = Stream;
Stream.prototype.pipe = function(dest, options) {
var source = this;
function ondata(chunk) {
if (dest.writable) {
if (false === dest.write(chunk)) source.pause();
}
}
source.on('data', ondata);
function ondrain() {
if (source.readable) source.resume();
}
dest.on('drain', ondrain);
/*
* If the 'end' option is not supplied, dest.end() will be called when
* source gets the 'end' event.
*/
if (!options || options.end !== false) {
function onend() {
dest.end();
}
source.on('end', onend);
}
dest.on('close', function() {
source.removeListener('data', ondata);
dest.removeListener('drain', ondrain);
source.removeListener('end', onend);
});
/*
* Questionable:
*/
if (!source.pause) {
source.pause = function() {
source.emit('pause');
};
}
if (!source.resume) {
source.resume = function() {
source.emit('resume');
};
}
dest.on('pause', function() {
source.pause();
});
dest.on('resume', function() {
if (source.readable) source.resume();
});
dest.emit('pipe', source);
};
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