/*
	sys_sdl.c

	(description)

	Copyright (C) 1996-1997  Id Software, Inc.

	This program is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License
	as published by the Free Software Foundation; either version 2
	of the License, or (at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

	See the GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program; if not, write to:

		Free Software Foundation, Inc.
		59 Temple Place - Suite 330
		Boston, MA  02111-1307, USA

*/
static const char rcsid[] = 
	"$Id$";

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_CONIO_H
# include <conio.h>
#endif
#ifdef HAVE_IO_H
# include <io.h>
#endif
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif

#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>

#ifndef _WIN32
# include <sys/types.h>
# include <sys/mman.h>
# include <ctype.h>
# include <signal.h>
# include <stdarg.h>
#endif

#include <SDL.h>
#include <SDL_main.h>

#include "QF/console.h"
#include "QF/qargs.h"
#include "QF/sys.h"

#include "client.h"
#include "compat.h"
#include "host.h"

qboolean    isDedicated = false;

int         noconinput;

#ifdef _WIN32
# include "winquake.h"
void        MaskExceptions (void);
#endif

void
Sys_Init (void)
{
#ifdef WIN32
	OSVERSIONINFO vinfo;
#endif
#ifdef USE_INTEL_ASM
#ifdef _WIN32
	MaskExceptions ();
#endif
	Sys_SetFPCW ();
#endif

#ifdef _WIN32
	// make sure the timer is high precision, otherwise NT gets 18ms resolution
	timeBeginPeriod (1);

	vinfo.dwOSVersionInfoSize = sizeof (vinfo);

	if (!GetVersionEx (&vinfo))
		Sys_Error ("Couldn't get OS info");

	if ((vinfo.dwMajorVersion < 4)
		|| (vinfo.dwPlatformId == VER_PLATFORM_WIN32s)) {
		Sys_Error ("This version of " PROGRAM
				   " requires at least Win95 or NT 4.0");
	}
#endif
}

static void
shutdown (void)
{
#ifndef _WIN32
	fcntl (0, F_SETFL, fcntl (0, F_GETFL, 0) & ~O_NONBLOCK);
#endif
}

#ifndef SDL_main
# define SDL_main main
#endif

int
SDL_main (int c, char **v)
{
	double      time, oldtime, newtime;

#ifndef WIN32
	signal (SIGFPE, SIG_IGN);
#endif

	memset (&host_parms, 0, sizeof (host_parms));

	COM_InitArgv (c, (const char **)v);
	host_parms.argc = com_argc;
	host_parms.argv = com_argv;

#ifndef WIN32
	noconinput = COM_CheckParm ("-noconinput");
	if (!noconinput)
		fcntl (0, F_SETFL, fcntl (0, F_GETFL, 0) | O_NONBLOCK);
#endif

	Sys_RegisterShutdown (Host_Shutdown);
	Sys_RegisterShutdown (shutdown);

	Host_Init ();

	oldtime = Sys_DoubleTime ();
	while (1) {
		// find time spent rendering last frame
		newtime = Sys_DoubleTime ();
		time = newtime - oldtime;

		Host_Frame (time);
		oldtime = newtime;
	}
	return 0;	// shouldn't be reachable, but mingw gcc 3.1 is being weird
}