1
0
mirror of https://github.com/vlang/v.git synced 2023-08-10 21:13:21 +03:00
v/vlib/io/readerwriter.v

38 lines
921 B
V
Raw Normal View History

module io
// ReaderWriter represents a stream that can be read and written.
pub interface ReaderWriter {
Reader
Writer
}
// ReaderWriterImpl is a ReaderWriter that can be made from
// a separate reader and writer (see fn make_readerwriter).
struct ReaderWriterImpl {
mut:
r Reader
w Writer
}
// read reads up to `buf.len` bytes into `buf`. It returns
// the number of bytes read or any error encountered.
pub fn (mut r ReaderWriterImpl) read(mut buf []u8) !int {
return r.r.read(mut buf)
}
// write writes `buf.len` bytes from `buf` to the underlying
// data stream. It returns the number of bytes written or any error
// encountered.
pub fn (mut r ReaderWriterImpl) write(buf []u8) !int {
return r.w.write(buf)
}
// make_readerwriter takes a rstream and a wstream and makes
// an rwstream with them.
pub fn make_readerwriter(r Reader, w Writer) ReaderWriterImpl {
return ReaderWriterImpl{
r: r
w: w
}
}