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'use strict'; // undocumented cb() API, needed for core, not for public API function destroy(err, cb) { var _this = this; var readableDestroyed = this._readableState && this._readableState.destroyed; var writableDestroyed = this._writableState && this._writableState.destroyed; if (readableDestroyed || writableDestroyed) { if (cb) { cb(err); } else if (err) { if (!this._writableState) { process.nextTick(emitErrorNT, this, err); } else if (!this._writableState.errorEmitted) { this._writableState.errorEmitted = true; process.nextTick(emitErrorNT, this, err); } } return this; } // we set destroyed to true before firing error callbacks in order // to make it re-entrance safe in case destroy() is called within callbacks if (this._readableState) { this._readableState.destroyed = true; } // if this is a duplex stream mark the writable part as destroyed as well if (this._writableState) { this._writableState.destroyed = true; } this._destroy(err || null, function (err) { if (!cb && err) { if (!_this._writableState) { process.nextTick(emitErrorAndCloseNT, _this, err); } else if (!_this._writableState.errorEmitted) { _this._writableState.errorEmitted = true; process.nextTick(emitErrorAndCloseNT, _this, err); } else { process.nextTick(emitCloseNT, _this); } } else if (cb) { process.nextTick(emitCloseNT, _this); cb(err); } else { process.nextTick(emitCloseNT, _this); } }); return this; } function emitErrorAndCloseNT(self, err) { emitErrorNT(self, err); emitCloseNT(self); } function emitCloseNT(self) { if (self._writableState && !self._writableState.emitClose) return; if (self._readableState && !self._readableState.emitClose) return; self.emit('close'); } function undestroy() { if (this._readableState) { this._readableState.destroyed = false; this._readableState.reading = false; this._readableState.ended = false; this._readableState.endEmitted = false; } if (this._writableState) { this._writableState.destroyed = false; this._writableState.ended = false; this._writableState.ending = false; this._writableState.finalCalled = false; this._writableState.prefinished = false; this._writableState.finished = false; this._writableState.errorEmitted = false; } } function emitErrorNT(self, err) { self.emit('error', err); } function errorOrDestroy(stream, err) { // We have tests that rely on errors being emitted // in the same tick, so changing this is semver major. // For now when you opt-in to autoDestroy we allow // the error to be emitted nextTick. In a future // semver major update we should change the default to this. var rState = stream._readableState; var wState = stream._writableState; if (rState && rState.autoDestroy || wState && wState.autoDestroy) stream.destroy(err);else stream.emit('error', err); } module.exports = { destroy: destroy, undestroy: undestroy, errorOrDestroy: errorOrDestroy };