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