DarkflameServer/thirdparty/raknet/Source/Kbhit.h

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/*****************************************************************************
kbhit() and getch() for Linux/UNIX
Chris Giese <geezer@execpc.com> http://my.execpc.com/~geezer
Release date: ?
This code is public domain (no copyright).
You can do whatever you want with it.
*****************************************************************************/
#if !defined(linux)
#include <conio.h> /* kbhit(), getch() */
#else
#include <sys/time.h> /* struct timeval, select() */
/* ICANON, ECHO, TCSANOW, struct termios */
#include <termios.h> /* tcgetattr(), tcsetattr() */
#include <stdlib.h> /* atexit(), exit() */
#include <unistd.h> /* read() */
#include <stdio.h> /* printf() */
#include <string.h> /* memcpy */
static struct termios g_old_kbd_mode;
/*****************************************************************************
*****************************************************************************/
static void cooked(void)
{
tcsetattr(0, TCSANOW, &g_old_kbd_mode);
}
/*****************************************************************************
*****************************************************************************/
static void raw(void)
{
static char init;
/**/
struct termios new_kbd_mode;
if(init)
return;
/* put keyboard (stdin, actually) in raw, unbuffered mode */
tcgetattr(0, &g_old_kbd_mode);
memcpy(&new_kbd_mode, &g_old_kbd_mode, sizeof(struct termios));
new_kbd_mode.c_lflag &= ~(ICANON | ECHO);
new_kbd_mode.c_cc[VTIME] = 0;
new_kbd_mode.c_cc[VMIN] = 1;
tcsetattr(0, TCSANOW, &new_kbd_mode);
/* when we exit, go back to normal, "cooked" mode */
atexit(cooked);
init = 1;
}
/*****************************************************************************
*****************************************************************************/
static int kbhit(void)
{
struct timeval timeout;
fd_set read_handles;
int status;
raw();
/* check stdin (fd 0) for activity */
FD_ZERO(&read_handles);
FD_SET(0, &read_handles);
timeout.tv_sec = timeout.tv_usec = 0;
status = select(0 + 1, &read_handles, NULL, NULL, &timeout);
if(status < 0)
{
printf("select() failed in kbhit()\n");
exit(1);
}
return status;
}
/*****************************************************************************
*****************************************************************************/
static int getch(void)
{
unsigned char temp;
raw();
/* stdin = fd 0 */
if(read(0, &temp, 1) != 1)
return 0;
return temp;
}
#endif