/*
Copy a producer stream to a consumer stream.
Returns an optional error and, if error is not nil, a flag indicating whether this error had happened in the consumer (false) or the producer (true).
*/
func Copy(drain stream.Stream, sink Stream) (error, bool) {
for {
val, err := drain.Next()
if err == stream.EOI {
break
}
if err != nil {
return err, false
}
if err := sink.Add(val); err != nil {
return err, true
}
}
return nil, false
}
// An analog of Copy for BufferedStream sink.
func CopyDirect(drain stream.Stream, sink *BufferedStream) (error, bool) {
for {
val, err := drain.Next()
if err == stream.EOI {
break
}
if err != nil {
return err, false
}
if err := sink.addDirect(val); err != nil {
return err, true
}
}
return nil, false
}