2022-10-08 20:43:47 +00:00
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/*
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* Copyright (C) 2022 Brian Evans
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 3 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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2020-05-23 08:49:30 +00:00
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package termios
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import (
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"os"
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"runtime"
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"syscall"
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"unsafe"
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)
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type winsize struct {
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Row uint16
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Col uint16
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Xpixel uint16
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Ypixel uint16
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}
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var fd = os.Stdin.Fd()
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func ioctl(fd, request, argp uintptr) error {
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if _, _, e := syscall.Syscall(syscall.SYS_IOCTL, fd, request, argp); e != 0 {
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return e
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}
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return nil
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}
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func GetWindowSize() (int, int) {
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var value winsize
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ioctl(fd, syscall.TIOCGWINSZ, uintptr(unsafe.Pointer(&value)))
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return int(value.Col), int(value.Row)
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}
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func getTermios() syscall.Termios {
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var value syscall.Termios
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err := ioctl(fd, getTermiosIoctl, uintptr(unsafe.Pointer(&value)))
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if err != nil {
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panic(err)
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}
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return value
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}
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func setTermios(termios syscall.Termios) {
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err := ioctl(fd, setTermiosIoctl, uintptr(unsafe.Pointer(&termios)))
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if err != nil {
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panic(err)
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}
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runtime.KeepAlive(termios)
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}
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func SetCharMode() {
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t := getTermios()
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t.Lflag = t.Lflag ^ syscall.ICANON
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t.Lflag = t.Lflag ^ syscall.ECHO
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setTermios(t)
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}
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func SetLineMode() {
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var t = getTermios()
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t.Lflag = t.Lflag | (syscall.ICANON | syscall.ECHO)
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setTermios(t)
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}
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