| Leo Repp | 58b9f11 | 2021-11-22 11:57:47 +0100 | [diff] [blame^] | 1 | 'use strict'; |
| 2 | |
| 3 | var isStream = module.exports = function (stream) { |
| 4 | return stream !== null && typeof stream === 'object' && typeof stream.pipe === 'function'; |
| 5 | }; |
| 6 | |
| 7 | isStream.writable = function (stream) { |
| 8 | return isStream(stream) && stream.writable !== false && typeof stream._write === 'function' && typeof stream._writableState === 'object'; |
| 9 | }; |
| 10 | |
| 11 | isStream.readable = function (stream) { |
| 12 | return isStream(stream) && stream.readable !== false && typeof stream._read === 'function' && typeof stream._readableState === 'object'; |
| 13 | }; |
| 14 | |
| 15 | isStream.duplex = function (stream) { |
| 16 | return isStream.writable(stream) && isStream.readable(stream); |
| 17 | }; |
| 18 | |
| 19 | isStream.transform = function (stream) { |
| 20 | return isStream.duplex(stream) && typeof stream._transform === 'function' && typeof stream._transformState === 'object'; |
| 21 | }; |