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-rw-r--r--deps/npm/node_modules/duplexer3/index.js76
1 files changed, 76 insertions, 0 deletions
diff --git a/deps/npm/node_modules/duplexer3/index.js b/deps/npm/node_modules/duplexer3/index.js
new file mode 100644
index 0000000000..1339ffc51c
--- /dev/null
+++ b/deps/npm/node_modules/duplexer3/index.js
@@ -0,0 +1,76 @@
+"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;