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package framing
type (
// UnmarshalFunc translates bytes to objects
UnmarshalFunc func([]byte, interface{}) error
// Decoder reads and decodes Protobuf messages from an io.Reader.
Decoder interface {
// Decode reads the next encoded message from its input and stores it
// in the value pointed to by m. If m isn't a proto.Message, Decode will panic.
Decode(interface{}) error
}
// DecoderFunc is the functional adaptation of Decoder
DecoderFunc func(interface{}) error
)
func (f DecoderFunc) Decode(m interface{}) error { return f(m) }
var _ = Decoder(DecoderFunc(nil))
// NewDecoder returns a new Decoder that reads from the given frame Reader.
func NewDecoder(r Reader, uf UnmarshalFunc) DecoderFunc {
return func(m interface{}) error {
// Note: the buf returned by ReadFrame will change over time, it can't be sub-sliced
// and then those sub-slices retained. Examination of generated proto code seems to indicate
// that byte buffers are copied vs. referenced by sub-slice (gogo protoc).
frame, err := r.ReadFrame()
if err != nil {
return err
}
return uf(frame, m)
}
}
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