Re: Input from keybord
[
Date Prev][
Date Next][
Thread Prev][
Thread Next]
[
Date Index]
[
Thread Index]
- Subject: Re: Input from keybord
- From: Asko Kauppi <askok@...>
- Date: 2006年6月18日 14:29:37 +0300
Hmm.. there might not be a valid answer for this, in plain Lua.
The reason, again, is that such a feature is not ANSI C, so... you'll
need an OS specific C binding.
Here's some code, off svn://slugak.dyndns.org/public/luax/trunk/
Modules/Sys/sys_module.c that may help you (or not?)
-asko
/*----- Keyboard functions -----*/
#ifdef PLATFORM_WIN32
#define Loc_KbHit() kbhit()
#define Loc_Getch() getch()
//
#elif (defined PLATFORM_WINCE)
#define Loc_KbHit() kbhit() // PocketConsole
#define Loc_Getch() FALSE //getch()
//
#else // Linux & OS X
//
static struct termios initial_settings, new_settings;
static int peek_character = -1;
static /*volatile*/ bool kb_state= 0; // -> 1 (in use) -> 2
(cleaned up)
//
static void Loc_InitKb( void )
{
// Different calling reasons (based on 'kb_state' value):
//
// 0: Keyboard services need to be initialised
// 1: Clean-up (called by 'atexit' during program termination)
// 2: Error (services already cleaned up!)
//
switch( kb_state )
{
case 0:
// Do terminal initialisation:
//
tcgetattr(0,&initial_settings);
new_settings = initial_settings;
new_settings.c_lflag &= ~ICANON;
new_settings.c_lflag &= ~ECHO;
new_settings.c_lflag &= ~ISIG;
new_settings.c_cc[VMIN] = 1;
new_settings.c_cc[VTIME] = 0;
tcsetattr(0, TCSANOW, &new_settings);
// Ask us to be called again when program terminates.
//
atexit( Loc_InitKb );
kb_state++;
break;
case 1:
// Called by 'atexit' to do cleanup:
//
tcsetattr(0, TCSANOW, &initial_settings);
kb_state++;
break;
default:
assert(FALSE);
break;
}
}
//
int Loc_KbHit( void ) // Returns the 'peek character'
{
unsigned char ch;
int nread;
if (kb_state != 1) // Do we have access to the keyboard services?
Loc_InitKb();
if (peek_character != -1)
return 1;
new_settings.c_cc[VMIN]=0;
tcsetattr(0, TCSANOW, &new_settings);
nread = read(0,&ch,1);
new_settings.c_cc[VMIN]=1;
tcsetattr(0, TCSANOW, &new_settings);
if(nread != 1)
return 0; // no keyboard press
peek_character = ch;
return ch;
}
//
uint Loc_Getch( void )
{
unsigned char ch;
if(peek_character != -1)
{
ch = peek_character;
peek_character = -1;
return ch;
}
read(0,&ch,1);
return ch;
}
//
#endif // Posix
//---
// [bool]= kbhit()
//
// Returns: 'true' if a keypress is pending (must be read by 'getch
()'!).
//
GLUA_FUNC( kbhit )
{
glua_pushBoolean( Loc_KbHit() );
}
GLUA_END
//---
// code_int= getch()
//
GLUA_FUNC( getch )
{
glua_pushUnsigned( Loc_Getch() );
}
GLUA_END
UkrNet kirjoitti 17.6.2006 kello 16.50:
I'm just a bigginer in Lua programming. I've got a question:
How can I read just one character from keybord?