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package hook
import (
"encoding/ascii85"
"errors"
"tunnel/pkg/netstring"
"tunnel/pkg/server/queue"
)
type b85Pipe struct{}
func (b85Pipe) Send(rq, wq queue.Q) error {
e := netstring.NewEncoder(wq.Writer())
for b := range rq {
out := make([]byte, ascii85.MaxEncodedLen(len(b)))
n := ascii85.Encode(out, b)
e.Encode(string(out[:n]))
}
return nil
}
func (b85Pipe) Recv(rq, wq queue.Q) error {
d := netstring.NewDecoder(rq.Reader())
for {
s, err := d.Decode()
if err != nil {
return err
}
out := make([]byte, 4*len(s))
if n, m, err := ascii85.Decode(out, []byte(s), true); err != nil {
return err
} else if m != len(s) {
return errors.New("decode fail: partial consumption")
} else {
wq <- out[:n]
}
}
}
func init() {
registerPipe("b85", "base85 filter out/in", b85Pipe{})
}
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