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package bufio
import "core:io"
// Read_Writer stores pointers to a Reader and a Writer
Read_Writer :: struct {
r: ^Reader,
w: ^Writer,
}
read_writer_init :: proc(rw: ^Read_Writer, r: ^Reader, w: ^Writer) {
rw.r, rw.w = r, w
}
read_writer_to_stream :: proc(rw: ^Read_Writer) -> (s: io.Stream) {
s.procedure = _read_writer_procedure
s.data = rw
return
}
@(private)
_read_writer_procedure := proc(stream_data: rawptr, mode: io.Stream_Mode, p: []byte, offset: i64, whence: io.Seek_From) -> (n: i64, err: io.Error) {
rw := (^Read_Writer)(stream_data)
n_int: int
#partial switch mode {
case .Flush:
err = writer_flush(rw.w)
return
case .Read:
n_int, err = reader_read(rw.r, p)
n = i64(n_int)
return
case .Write:
n_int, err = writer_write(rw.w, p)
n = i64(n_int)
return
case .Query:
return io.query_utility({.Flush, .Read, .Write, .Query})
}
return 0, .Unsupported
}
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