func readAddr(win *acme.Win) (q0, q1 int, err error) {
if _, _, err := win.ReadAddr(); err != nil {
return 0, 0, err
}
if err := win.Ctl("addr=dot"); err != nil {
return 0, 0, err
}
return win.ReadAddr()
}
func readAddr(win *acme.Win) (q0, q1 int, err error) {
// This first read is bogus.
// Acme zeroes the win's address the first time addr is opened.
// So, we need to open it before setting addr=dot,
// lest we just read back a zero address.
if _, _, err := win.ReadAddr(); err != nil {
return 0, 0, err
}
if err := win.Ctl("addr=dot\n"); err != nil {
return 0, 0, err
}
return win.ReadAddr()
}
func selection(win *acme.Win, body []byte) (int, int, error) {
if _, _, err := win.ReadAddr(); err != nil {
return 0, 0, err
}
if err := win.Ctl("addr=dot"); err != nil {
return 0, 0, err
}
q0, q1, err := win.ReadAddr()
if err != nil {
return 0, 0, err
}
off0, err := byteOff(q0, bytes.NewReader(body))
if err != nil {
return 0, 0, err
}
off1, err := byteOff(q1, bytes.NewReader(body))
if err != nil {
return 0, 0, err
}
return off0, off1, nil
}
