bombadillo/termios/termios.go

76 lines
1.7 KiB
Go

/*
* Copyright (C) 2022 Brian Evans
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package termios
import (
"os"
"runtime"
"syscall"
"unsafe"
)
type winsize struct {
Row uint16
Col uint16
Xpixel uint16
Ypixel uint16
}
var fd = os.Stdin.Fd()
func ioctl(fd, request, argp uintptr) error {
if _, _, e := syscall.Syscall(syscall.SYS_IOCTL, fd, request, argp); e != 0 {
return e
}
return nil
}
func GetWindowSize() (int, int) {
var value winsize
ioctl(fd, syscall.TIOCGWINSZ, uintptr(unsafe.Pointer(&value)))
return int(value.Col), int(value.Row)
}
func getTermios() syscall.Termios {
var value syscall.Termios
err := ioctl(fd, getTermiosIoctl, uintptr(unsafe.Pointer(&value)))
if err != nil {
panic(err)
}
return value
}
func setTermios(termios syscall.Termios) {
err := ioctl(fd, setTermiosIoctl, uintptr(unsafe.Pointer(&termios)))
if err != nil {
panic(err)
}
runtime.KeepAlive(termios)
}
func SetCharMode() {
t := getTermios()
t.Lflag = t.Lflag ^ syscall.ICANON
t.Lflag = t.Lflag ^ syscall.ECHO
setTermios(t)
}
func SetLineMode() {
var t = getTermios()
t.Lflag = t.Lflag | (syscall.ICANON | syscall.ECHO)
setTermios(t)
}