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author | 2020-11-16 00:10:28 +0100 | |
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committer | 2020-11-16 00:10:28 +0100 | |
commit | e06ec920f7a5d784e674c4c4b4e6d1da3dc7391d (patch) | |
tree | 55713f725f77b44ebfec86e4eec3ce33e71458ca /node_modules/stream-each/index.js | |
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api, login, auth
Diffstat (limited to 'node_modules/stream-each/index.js')
-rw-r--r-- | node_modules/stream-each/index.js | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/node_modules/stream-each/index.js b/node_modules/stream-each/index.js new file mode 100644 index 0000000..6d65b57 --- /dev/null +++ b/node_modules/stream-each/index.js @@ -0,0 +1,59 @@ +var eos = require('end-of-stream') +var shift = require('stream-shift') + +module.exports = each + +function each (stream, fn, cb) { + var want = true + var error = null + var ended = false + var running = false + var calling = false + + stream.on('readable', onreadable) + onreadable() + + if (cb) eos(stream, {readable: true, writable: false}, done) + return stream + + function done (err) { + if (!error) error = err + ended = true + if (!running) cb(error) + } + + function onreadable () { + if (want) read() + } + + function afterRead (err) { + running = false + + if (err) { + error = err + if (ended) return cb(error) + stream.destroy(err) + return + } + if (ended) return cb(error) + if (!calling) read() + } + + function read () { + while (!running && !ended) { + want = false + + var data = shift(stream) + if (ended) return + if (data === null) { + want = true + return + } + + running = true + calling = true + fn(data, afterRead) + calling = false + } + } +} |