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package os
import "core:io"
stream_from_handle :: proc(fd: Handle) -> io.Stream {
s: io.Stream
s.stream_data = rawptr(uintptr(fd))
s.stream_vtable = _file_stream_vtable
return s
}
@(private)
_file_stream_vtable := &io.Stream_VTable{
impl_read = proc(s: io.Stream, p: []byte) -> (n: int, err: io.Error) {
fd := Handle(uintptr(s.stream_data))
os_err: Errno
n, os_err = read(fd, p)
return
},
impl_read_at = proc(s: io.Stream, p: []byte, offset: i64) -> (n: int, err: io.Error) {
when ODIN_OS == .Windows || ODIN_OS == .WASI {
fd := Handle(uintptr(s.stream_data))
os_err: Errno
n, os_err = read_at(fd, p, offset)
}
return
},
impl_write = proc(s: io.Stream, p: []byte) -> (n: int, err: io.Error) {
fd := Handle(uintptr(s.stream_data))
os_err: Errno
n, os_err = write(fd, p)
return
},
impl_write_at = proc(s: io.Stream, p: []byte, offset: i64) -> (n: int, err: io.Error) {
when ODIN_OS == .Windows || ODIN_OS == .WASI {
fd := Handle(uintptr(s.stream_data))
os_err: Errno
n, os_err = write_at(fd, p, offset)
_ = os_err
}
return
},
impl_seek = proc(s: io.Stream, offset: i64, whence: io.Seek_From) -> (i64, io.Error) {
fd := Handle(uintptr(s.stream_data))
n, os_err := seek(fd, offset, int(whence))
_ = os_err
return n, nil
},
impl_size = proc(s: io.Stream) -> i64 {
fd := Handle(uintptr(s.stream_data))
sz, _ := file_size(fd)
return sz
},
impl_flush = proc(s: io.Stream) -> io.Error {
when ODIN_OS == .Windows {
fd := Handle(uintptr(s.stream_data))
flush(fd)
} else {
// TOOD(bill): other operating systems
}
return nil
},
impl_close = proc(s: io.Stream) -> io.Error {
fd := Handle(uintptr(s.stream_data))
close(fd)
return nil
},
}
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