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48 lines
1.1 KiB
Nim
48 lines
1.1 KiB
Nim
## Nim-LibP2P
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## Copyright (c) 2020 Status Research & Development GmbH
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## Licensed under either of
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## * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
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## * MIT license ([LICENSE-MIT](LICENSE-MIT))
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## at your option.
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## This file may not be copied, modified, or distributed except according to
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## those terms.
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import chronos
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type
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Source*[T] = iterator(): Future[T] {.closure.}
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Through*[T] = proc(i: Source[T]): Source[T]
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Sink*[T] = proc(i: Source[T]): Future[void]
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Duplex*[T] = Source[T] | Sink[T]
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Stream*[T] = ref object of RootObj
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isClosed*: bool
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ByteStream* = Stream[seq[byte]]
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proc source*[T](s: Stream[T]): Source[seq[byte]] =
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discard
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proc sink*[T](s: Stream[T]): Sink[seq[byte]] =
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discard
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proc atEof*[T](s: Stream[T]): bool =
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false
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proc close*[T](s: Stream[T]) {.async.} =
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s.isClosed = true
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proc closed*[T](s: Stream[T]): bool =
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s.isClosed
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proc duplex*[T](s: Stream[T]): (Source[T], Sink[T]) =
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(s.source, s.sink)
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iterator items*[T](i: Source[T]): Future[T] =
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## Workaround semcheck, inlining everything allow proper iteration
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while true:
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var item = i()
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if i.finished:
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break
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yield item
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