package main

import (
	"os"
	"syscall"
	"unsafe"
)

// https://man7.org/linux/man-pages/man2/TIOCSWINSZ.2const.html

// winSize console窗口大小
type winSize struct {
	wsRow     uint16
	wsCols    uint16
	wsXPixels uint16
	wxYPixels uint16
}

// getConsoleSize 获取控制台窗口大小
func getConsoleSize() (cols, rows int) {
	var sz winSize
	_, _, _ = syscall.Syscall(syscall.SYS_IOCTL,
		os.Stdout.Fd(), uintptr(syscall.TIOCGWINSZ), uintptr(unsafe.Pointer(&sz)))
	return int(sz.wsCols), int(sz.wsRow)
}