package term

 import (

 	"syscall"
 	"unsafe"

 )

 // #include <termios.h>
 // #include <sys/ioctl.h>
 /*

 void MakeRaw(int fd) {

   struct termios t;
 
   // FIXME: Handle errors?

   ioctl(fd, TCGETS, &t);

 
   t.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR | IGNCR | ICRNL | IXON);

   t.c_oflag &= ~OPOST;
   t.c_lflag &= ~(ECHO | ECHONL | ICANON | IEXTEN | ISIG);

   t.c_cflag &= ~(CSIZE | PARENB);
   t.c_cflag |= CS8;
 

   ioctl(fd, TCSETS, &t);

 }
 */
 import "C"
 

 const (
 	getTermios = syscall.TCGETS
 	setTermios = syscall.TCSETS
 )

 
 // MakeRaw put the terminal connected to the given file descriptor into raw
 // mode and returns the previous state of the terminal so that it can be
 // restored.
 func MakeRaw(fd int) (*State, error) {

 	var oldState State
 	if _, _, err := syscall.Syscall6(syscall.SYS_IOCTL, uintptr(fd), syscall.TCGETS, uintptr(unsafe.Pointer(&oldState.termios)), 0, 0, 0); err != 0 {
 		return nil, err
 	}

 	C.MakeRaw(C.int(fd))

 	return &oldState, nil
 
 	// FIXME: post on goland issues this: very same as the C function bug non-working
 
 	// newState := oldState.termios
 
 	// newState.Iflag &^= (IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR | IGNCR | ICRNL | IXON)
 	// newState.Oflag &^= OPOST
 	// newState.Lflag &^= (ECHO | syscall.ECHONL | ICANON | ISIG | IEXTEN)
 	// newState.Cflag &^= (CSIZE | syscall.PARENB)
 	// newState.Cflag |= CS8
 
 	// if _, _, err := syscall.Syscall(syscall.SYS_IOCTL, uintptr(fd), syscall.TCSETS, uintptr(unsafe.Pointer(&newState))); err != 0 {
 	// 	return nil, err
 	// }
 	// return &oldState, nil
 }