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* 4738Kartik Agaram2018-10-301-2/+2
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* 4736Kartik Agaram2018-10-291-43/+48
| | | | | | | | | We'll use a common stream data structure for input and output streams. Having separate types makes more sense in a more high-level language, where we have type checking and where functions for handling the different types are more concise. But in machine code the sweet spot is more toward fewer types.
* 4735Kartik Agaram2018-10-281-6/+6
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* 4719 - testable interface wrapping around exit()Kartik Agaram2018-10-241-2/+2
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* 4711Kartik Agaram2018-10-171-80/+27
| | | | | | | Extract a helper for appending strings to raw buffers. I'd been resisting this idea, but it actually turns out to be a pretty clean abstraction in the end.
* 4710Kartik Agaram2018-10-171-1/+1
| | | | | Start using write() instead of _write().. and we promptly find a typo when dealing with real file descriptors.
* 4708Kartik Agaram2018-10-171-2/+2
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* 4707 - subx: dependency-injected write() primitiveKartik Agaram2018-10-161-0/+251