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"use strict";
var stream = require("stream");
function DuplexWrapper(options, writable, readable) {
if (typeof readable === "undefined") {
readable = writable;
writable = options;
options = null;
}
stream.Duplex.call(this, options);
if (typeof readable.read !== "function") {
readable = (new stream.Readable(options)).wrap(readable);
}
this._writable = writable;
this._readable = readable;
this._waiting = false;
var self = this;
writable.once("finish", function() {
self.end();
});
this.once("finish", function() {
writable.end();
});
readable.on("readable", function() {
if (self._waiting) {
self._waiting = false;
self._read();
}
});
readable.once("end", function() {
self.push(null);
});
if (!options || typeof options.bubbleErrors === "undefined" || options.bubbleErrors) {
writable.on("error", function(err) {
self.emit("error", err);
});
readable.on("error", function(err) {
self.emit("error", err);
});
}
}
DuplexWrapper.prototype = Object.create(stream.Duplex.prototype, {constructor: {value: DuplexWrapper}});
DuplexWrapper.prototype._write = function _write(input, encoding, done) {
this._writable.write(input, encoding, done);
};
DuplexWrapper.prototype._read = function _read() {
var buf;
var reads = 0;
while ((buf = this._readable.read()) !== null) {
this.push(buf);
reads++;
}
if (reads === 0) {
this._waiting = true;
}
};
module.exports = function duplex2(options, writable, readable) {
return new DuplexWrapper(options, writable, readable);
};
module.exports.DuplexWrapper = DuplexWrapper;