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Kartik Agaram 2018-11-27 13:31:48 -08:00
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@ -360,9 +360,9 @@ Here's what I've built so far:
never accidentally go out of array bounds.
* `read`: takes two arguments, `f` and `s`.
- `s` is an address to a _stream_ to save the read data to. We read as much
data as can fit in `s`, and no more.
- `f` is either a file descriptor to write `s` to, or (in tests) a _stream_.
- `f` is either a file descriptor to read from, or (in tests) a stream.
- `s` is an address to a stream to save the read data to. We read as much
data as can fit in (the free space of) `s`, and no more.
Like with `write()`, this wrapper around the Unix `read()` syscall adds the
ability to handle 'fake' file descriptors in tests, and reduces the chances
@ -374,7 +374,7 @@ Here's what I've built so far:
* `stop`: takes two arguments:
- `ed` is an address to an _exit descriptor_. Exit descriptors allow us to
`exit()` the program normally, but return to the test harness within
`exit()` the program in production, but return to the test harness within
tests. That allows tests to make assertions about when `exit()` is called.
- `value` is the status code to `exit()` with.