SRB2/src/sdl/i_system.c

// Emacs style mode select   -*- C++ -*-
//
// SONIC ROBO BLAST 2
//-----------------------------------------------------------------------------
//
// Copyright (C) 1993-1996 by id Software, Inc.
// Portions Copyright (C) 1998-2000 by DooM Legacy Team.
// Copyright (C) 2014-2023 by Sonic Team Junior.
//
// 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.
//
// Changes by Graue <graue@oceanbase.org> are in the public domain.
//
//-----------------------------------------------------------------------------
/// \file
/// \brief SRB2 system stuff for SDL

#include <signal.h>

#ifdef _WIN32
#define RPC_NO_WINDOWS_H
#include <windows.h>
#include "../doomtype.h"
typedef BOOL (WINAPI *p_GetDiskFreeSpaceExA)(LPCSTR, PULARGE_INTEGER, PULARGE_INTEGER, PULARGE_INTEGER);
typedef BOOL (WINAPI *p_IsProcessorFeaturePresent) (DWORD);
typedef DWORD (WINAPI *p_timeGetTime) (void);
typedef UINT (WINAPI *p_timeEndPeriod) (UINT);
typedef HANDLE (WINAPI *p_OpenFileMappingA) (DWORD, BOOL, LPCSTR);
typedef LPVOID (WINAPI *p_MapViewOfFile) (HANDLE, DWORD, DWORD, DWORD, SIZE_T);

// This is for RtlGenRandom.
#define SystemFunction036 NTAPI SystemFunction036
#include <ntsecapi.h>
#undef SystemFunction036

#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef __GNUC__
#include <unistd.h>
#elif defined (_MSC_VER)
#include <direct.h>
#endif
#if defined (__unix__) || defined (UNIXCOMMON)
#include <fcntl.h>
#endif

#include <stdio.h>
#ifdef _WIN32
#include <conio.h>
#endif

#ifdef _MSC_VER
#pragma warning(disable : 4214 4244)
#endif

#ifdef HAVE_SDL
#define _MATH_DEFINES_DEFINED
#include "SDL.h"

#ifdef HAVE_TTF
#include "i_ttf.h"
#endif

#ifdef _MSC_VER
#pragma warning(default : 4214 4244)
#endif

#include "SDL_cpuinfo.h"
#define HAVE_SDLCPUINFO

#if defined (__unix__) || defined(__APPLE__) || (defined (UNIXCOMMON) && !defined (__HAIKU__))
#if defined (__linux__)
#include <sys/vfs.h>
#else
#include <sys/param.h>
#include <sys/mount.h>
/*For meminfo*/
#include <sys/types.h>
#ifdef FREEBSD
#include <kvm.h>
#endif
#include <nlist.h>
#include <sys/vmmeter.h>
#endif
#endif

#if defined (__linux__) || (defined (UNIXCOMMON) && !defined (__HAIKU__))
#ifndef NOTERMIOS
#include <termios.h>
#include <sys/ioctl.h> // ioctl
#define HAVE_TERMIOS
#endif
#endif

#if defined (__unix__) || (defined (UNIXCOMMON) && !defined (__APPLE__))
#include <errno.h>
#include <sys/wait.h>
#define NEWSIGNALHANDLER
#endif

#ifndef NOMUMBLE
#ifdef __linux__ // need -lrt
#include <sys/mman.h>
#ifdef MAP_FAILED
#define HAVE_SHM
#endif
#include <wchar.h>
#endif

#ifdef _WIN32
#define HAVE_MUMBLE
#define WINMUMBLE
#elif defined (HAVE_SHM)
#define HAVE_MUMBLE
#endif
#endif // NOMUMBLE

#ifndef O_BINARY
#define O_BINARY 0
#endif

#ifdef __APPLE__
#include "macosx/mac_resources.h"
#endif

#ifndef errno
#include <errno.h>
#endif

#if defined (__unix__) || defined(__APPLE__) || defined (UNIXCOMMON)
#include <execinfo.h>
#include <time.h>
#define UNIXBACKTRACE
#endif

// Locations to directly check for srb2.pk3 in
const char *wadDefaultPaths[] = {
#if defined (__unix__) || defined(__APPLE__) || defined (UNIXCOMMON)
	"/usr/local/share/games/SRB2",
	"/usr/local/games/SRB2",
	"/usr/share/games/SRB2",
	"/usr/games/SRB2",
#elif defined (_WIN32)
	"c:\\games\\srb2",
	"\\games\\srb2",
#endif
	NULL
};

// Folders to recurse through looking for srb2.pk3
const char *wadSearchPaths[] = {
#if defined (__unix__) || defined(__APPLE__) || defined (UNIXCOMMON)
	"/usr/local/games",
	"/usr/games",
	"/usr/local",
#elif defined (_WIN32)
	"c:\\games",
	"\\games",
#endif
	NULL
};

/**	\brief WAD file to look for
*/
#define WADKEYWORD1 "srb2.pk3"
/**	\brief holds wad path
*/
static char returnWadPath[256];

//Alam_GBC: SDL

#include "../doomdef.h"
#include "../m_misc.h"
#include "../i_time.h"
#include "../i_video.h"
#include "../i_sound.h"
#include "../i_system.h"
#include "../i_threads.h"
#include "../screen.h" //vid.WndParent
#include "../d_net.h"
#include "../g_game.h"
#include "../filesrch.h"
#include "endtxt.h"
#include "sdlmain.h"

#include "../i_joy.h"

#include "../m_argv.h"

#include "../r_main.h" // Frame interpolation/uncapped
#include "../r_fps.h"

#ifdef MAC_ALERT
#include "macosx/mac_alert.h"
#endif

#include "../d_main.h"

#if !defined(NOMUMBLE) && defined(HAVE_MUMBLE)
// Mumble context string
#include "../d_clisrv.h"
#include "../byteptr.h"
#endif

/**	\brief	The JoyReset function

	\param	JoySet	Joystick info to reset

	\return	void
*/
static void JoyReset(SDLJoyInfo_t *JoySet)
{
	if (JoySet->dev)
	{
		SDL_JoystickClose(JoySet->dev);
	}
	JoySet->dev = NULL;
	JoySet->oldjoy = -1;
	JoySet->axises = JoySet->buttons = JoySet->hats = JoySet->balls = 0;
	//JoySet->scale
}

/**	\brief First joystick up and running
*/
static INT32 joystick_started  = 0;

/**	\brief SDL info about joystick 1
*/
SDLJoyInfo_t JoyInfo;


/**	\brief Second joystick up and running
*/
static INT32 joystick2_started = 0;

/**	\brief SDL inof about joystick 2
*/
SDLJoyInfo_t JoyInfo2;

#ifdef HAVE_TERMIOS
static INT32 fdmouse2 = -1;
static INT32 mouse2_started = 0;
#endif

SDL_bool consolevent = SDL_FALSE;
SDL_bool framebuffer = SDL_FALSE;

UINT8 keyboard_started = false;

#ifdef UNIXBACKTRACE
#define STDERR_WRITE(string) if (fd != -1) I_OutputMsg("%s", string)
#define CRASHLOG_WRITE(string) if (fd != -1) write(fd, string, strlen(string))
#define CRASHLOG_STDERR_WRITE(string) \
	if (fd != -1)\
		write(fd, string, strlen(string));\
	I_OutputMsg("%s", string)

static void write_backtrace(INT32 signal)
{
	int fd = -1;
	size_t size;
	time_t rawtime;
	struct tm timeinfo;

	enum { BT_SIZE = 1024, STR_SIZE = 32 };
	void *array[BT_SIZE];
	char timestr[STR_SIZE];

	const char *error = "An error occurred within SRB2! Send this stack trace to someone who can help!\n";
	const char *error2 = "(Or find crash-log.txt in your SRB2 directory.)\n"; // Shown only to stderr.

	fd = open(va("%s" PATHSEP "%s", srb2home, "crash-log.txt"), O_CREAT|O_APPEND|O_RDWR, S_IRUSR|S_IWUSR);

	if (fd == -1)
		I_OutputMsg("\nWARNING: Couldn't open crash log for writing! Make sure your permissions are correct. Please save the below report!\n");

	// Get the current time as a string.
	time(&rawtime);
	localtime_r(&rawtime, &timeinfo);
	strftime(timestr, STR_SIZE, "%a, %d %b %Y %T %z", &timeinfo);

	CRASHLOG_WRITE("------------------------\n"); // Nice looking seperator

	CRASHLOG_STDERR_WRITE("\n"); // Newline to look nice for both outputs.
	CRASHLOG_STDERR_WRITE(error); // "Oops, SRB2 crashed" message
	STDERR_WRITE(error2); // Tell the user where the crash log is.

	// Tell the log when we crashed.
	CRASHLOG_WRITE("Time of crash: ");
	CRASHLOG_WRITE(timestr);
	CRASHLOG_WRITE("\n");

	// Give the crash log the cause and a nice 'Backtrace:' thing
	// The signal is given to the user when the parent process sees we crashed.
	CRASHLOG_WRITE("Cause: ");
	CRASHLOG_WRITE(strsignal(signal));
	CRASHLOG_WRITE("\n"); // Newline for the signal name

	CRASHLOG_STDERR_WRITE("\nBacktrace:\n");

	// Flood the output and log with the backtrace
	size = backtrace(array, BT_SIZE);
	backtrace_symbols_fd(array, size, fd);
	backtrace_symbols_fd(array, size, STDERR_FILENO);

	CRASHLOG_WRITE("\n"); // Write another newline to the log so it looks nice :)

	close(fd);
}
#undef STDERR_WRITE
#undef CRASHLOG_WRITE
#undef CRASHLOG_STDERR_WRITE
#endif // UNIXBACKTRACE

static void I_ReportSignal(int num, int coredumped)
{
	//static char msg[] = "oh no! back to reality!\r\n";
	const char *sigmsg, *sigttl;
	char ttl[128];

	switch (num)
	{
//	case SIGINT:
//		sigttl = "SIGINT"
//		sigmsg = "SRB2 was interrupted prematurely by the user.";
//		break;
	case SIGILL:
		sigmsg = "SRB2 has attempted to execute an illegal instruction and needs to close. %s";
		sigttl = "SIGILL"; // illegal instruction - invalid function image
		break;
	case SIGFPE:
		sigmsg = "SRB2 has encountered a mathematical exception and needs to close. %s";
		sigttl = "SIGFPE"; // mathematical exception
		break;
	case SIGSEGV:
		sigmsg = "SRB2 has attempted to access a memory location that it shouldn't and needs to close. %s";
		sigttl = "SIGSEGV"; // segment violation
		break;
//	case SIGTERM:
//		sigmsg = "SRB2 was terminated by a kill signal.";
//		sigttl = "SIGTERM"; // Software termination signal from kill
//		break;
//	case SIGBREAK:
//		sigmsg = "SRB2 was terminated by a Ctrl-Break sequence.";
//		sigttl = "SIGBREAK" // Ctrl-Break sequence
//		break;
	case SIGABRT:
		sigmsg = "SRB2 was terminated by an abort signal. %s";
		sigttl = "SIGABRT"; // abnormal termination triggered by abort call
		break;
	default:
		sigmsg = "SRB2 was terminated by an unknown signal. %s";

		sprintf(ttl, "number %d", num);
		if (coredumped)
			sigttl = 0;
		else
			sigttl = ttl;
	}

	if (coredumped)
	{
		if (sigttl)
			sprintf(ttl, "%s (core dumped)", sigttl);
		else
			strcat(ttl, " (core dumped)");

		sigttl = ttl;
	}

	sprintf(ttl, "Process killed by signal: %s", sigttl);

	sigttl = ttl;

	I_OutputMsg("\n%s\n\n", sigttl);

	if (M_CheckParm("-dedicated"))
		return;

	const SDL_MessageBoxButtonData buttons[] = {
		{ SDL_MESSAGEBOX_BUTTON_RETURNKEY_DEFAULT, 0,		"OK" },
		{ 										0, 1,  "Discord" },
	};

	const SDL_MessageBoxData messageboxdata = {
		SDL_MESSAGEBOX_ERROR, /* .flags */
		NULL, /* .window */
		sigttl, /* .title */
		va(sigmsg,
			"\n\nTo help us figure out the cause, you can visit our official Discord server\nwhere you will find more instructions on how to submit a crash report.\n\nSorry for the inconvenience!"), /* .message */
		SDL_arraysize(buttons), /* .numbuttons */
		buttons, /* .buttons */
		NULL /* .colorScheme */
	};

	int buttonid;

	SDL_ShowMessageBox(&messageboxdata, &buttonid);

	if (buttonid == 1)
		SDL_OpenURL("https://www.srb2.org/discord");
}

#ifndef NEWSIGNALHANDLER
FUNCNORETURN static ATTRNORETURN void signal_handler(INT32 num)
{
	D_QuitNetGame(); // Fix server freezes
	CL_AbortDownloadResume();
#ifdef UNIXBACKTRACE
	write_backtrace(num);
#endif
	I_ReportSignal(num, 0);
	I_ShutdownSystem();
	signal(num, SIG_DFL);               //default signal action
	raise(num);
	I_Quit();
}
#endif

FUNCNORETURN static ATTRNORETURN void quit_handler(int num)
{
	signal(num, SIG_DFL); //default signal action
	raise(num);
	I_Quit();
}

#ifdef HAVE_TERMIOS
// TERMIOS console code from Quake3: thank you!
SDL_bool stdin_active = SDL_TRUE;

typedef struct
{
	size_t cursor;
	char buffer[256];
} feild_t;

feild_t tty_con;

// when printing general stuff to stdout stderr (Sys_Printf)
//   we need to disable the tty console stuff
// this increments so we can recursively disable
static INT32 ttycon_hide = 0;
// some key codes that the terminal may be using
// TTimo NOTE: I'm not sure how relevant this is
static INT32 tty_erase;
static INT32 tty_eof;

static struct termios tty_tc;

// =============================================================
// tty console routines
// NOTE: if the user is editing a line when something gets printed to the early console then it won't look good
//   so we provide tty_Clear and tty_Show to be called before and after a stdout or stderr output
// =============================================================

// flush stdin, I suspect some terminals are sending a LOT of garbage
// FIXME TTimo relevant?
#if 0
static inline void tty_FlushIn(void)
{
	char key;
	while (read(STDIN_FILENO, &key, 1)!=-1);
}
#endif

// do a backspace
// TTimo NOTE: it seems on some terminals just sending '\b' is not enough
//   so for now, in any case we send "\b \b" .. yeah well ..
//   (there may be a way to find out if '\b' alone would work though)
static void tty_Back(void)
{
	char key;
	ssize_t d;
	key = '\b';
	d = write(STDOUT_FILENO, &key, 1);
	key = ' ';
	d = write(STDOUT_FILENO, &key, 1);
	key = '\b';
	d = write(STDOUT_FILENO, &key, 1);
	(void)d;
}

static void tty_Clear(void)
{
	size_t i;
	if (tty_con.cursor>0)
	{
		for (i=0; i<tty_con.cursor; i++)
		{
			tty_Back();
		}
	}

}

// clear the display of the line currently edited
// bring cursor back to beginning of line
static inline void tty_Hide(void)
{
	//I_Assert(consolevent);
	if (ttycon_hide)
	{
		ttycon_hide++;
		return;
	}
	tty_Clear();
	ttycon_hide++;
}

// show the current line
// FIXME TTimo need to position the cursor if needed??
static inline void tty_Show(void)
{
	size_t i;
	ssize_t d;
	//I_Assert(consolevent);
	I_Assert(ttycon_hide>0);
	ttycon_hide--;
	if (ttycon_hide == 0 && tty_con.cursor)
	{
		for (i=0; i<tty_con.cursor; i++)
		{
			d = write(STDOUT_FILENO, tty_con.buffer+i, 1);
		}
	}
	(void)d;
}

// never exit without calling this, or your terminal will be left in a pretty bad state
static void I_ShutdownConsole(void)
{
	if (consolevent)
	{
		I_OutputMsg("Shutdown tty console\n");
		consolevent = SDL_FALSE;
		tcsetattr (STDIN_FILENO, TCSADRAIN, &tty_tc);
	}
}

static void I_StartupConsole(void)
{
	struct termios tc;

	// TTimo
	// https://zerowing.idsoftware.com/bugzilla/show_bug.cgi?id=390 (404)
	// then SIGTTIN or SIGTOU is emitted, if not catched, turns into a SIGSTP
	signal(SIGTTIN, SIG_IGN);
	signal(SIGTTOU, SIG_IGN);

	consolevent = !M_CheckParm("-noconsole");
	framebuffer = M_CheckParm("-framebuffer");

	if (framebuffer)
		consolevent = SDL_FALSE;

	if (!consolevent) return;

	if (isatty(STDIN_FILENO)!=1)
	{
		I_OutputMsg("stdin is not a tty, tty console mode failed\n");
		consolevent = SDL_FALSE;
		return;
	}
	memset(&tty_con, 0x00, sizeof(tty_con));
	tcgetattr (0, &tty_tc);
	tty_erase = tty_tc.c_cc[VERASE];
	tty_eof = tty_tc.c_cc[VEOF];
	tc = tty_tc;
	/*
	 ECHO: don't echo input characters
	 ICANON: enable canonical mode.  This  enables  the  special
	  characters  EOF,  EOL,  EOL2, ERASE, KILL, REPRINT,
	  STATUS, and WERASE, and buffers by lines.
	 ISIG: when any of the characters  INTR,  QUIT,  SUSP,  or
	  DSUSP are received, generate the corresponding signal
	*/
	tc.c_lflag &= ~(ECHO | ICANON);
	/*
	 ISTRIP strip off bit 8
	 INPCK enable input parity checking
	 */
	tc.c_iflag &= ~(ISTRIP | INPCK);
	tc.c_cc[VMIN] = 0; //1?
	tc.c_cc[VTIME] = 0;
	tcsetattr (0, TCSADRAIN, &tc);
}

void I_GetConsoleEvents(void)
{
	// we use this when sending back commands
	event_t ev = {0};
	char key = 0;
	ssize_t d;

	if (!consolevent)
		return;

	ev.type = ev_console;
	if (read(STDIN_FILENO, &key, 1) == -1 || !key)
		return;

	// we have something
	// backspace?
	// NOTE TTimo testing a lot of values .. seems it's the only way to get it to work everywhere
	if ((key == tty_erase) || (key == 127) || (key == 8))
	{
		if (tty_con.cursor > 0)
		{
			tty_con.cursor--;
			tty_con.buffer[tty_con.cursor] = '\0';
			tty_Back();
		}
		ev.key = KEY_BACKSPACE;
	}
	else if (key < ' ') // check if this is a control char
	{
		if (key == '\n')
		{
			tty_Clear();
			tty_con.cursor = 0;
			ev.key = KEY_ENTER;
		}
		else return;
	}
	else
	{
		// push regular character
		ev.key = tty_con.buffer[tty_con.cursor] = key;
		tty_con.cursor++;
		// print the current line (this is differential)
		d = write(STDOUT_FILENO, &key, 1);
	}
	if (ev.key) D_PostEvent(&ev);
	//tty_FlushIn();
	(void)d;
}

#elif defined (_WIN32)
static BOOL I_ReadyConsole(HANDLE ci)
{
	DWORD gotinput;
	if (ci == INVALID_HANDLE_VALUE) return FALSE;
	if (WaitForSingleObject(ci,0) != WAIT_OBJECT_0) return FALSE;
	if (GetFileType(ci) != FILE_TYPE_CHAR) return FALSE;
	if (!GetConsoleMode(ci, &gotinput)) return FALSE;
	return (GetNumberOfConsoleInputEvents(ci, &gotinput) && gotinput);
}

static boolean entering_con_command = false;

static void Impl_HandleKeyboardConsoleEvent(KEY_EVENT_RECORD evt, HANDLE co)
{
	event_t event;
	CONSOLE_SCREEN_BUFFER_INFO CSBI;
	DWORD t;

	memset(&event,0x00,sizeof (event));

	if (evt.bKeyDown)
	{
		event.type = ev_console;
		entering_con_command = true;
		switch (evt.wVirtualKeyCode)
		{
			case VK_ESCAPE:
			case VK_TAB:
				event.key = KEY_NULL;
				break;
			case VK_RETURN:
				entering_con_command = false;
				/* FALLTHRU */
			default:
				//event.key = MapVirtualKey(evt.wVirtualKeyCode,2); // convert in to char
				event.key = evt.uChar.AsciiChar;
		}
		if (co != INVALID_HANDLE_VALUE && GetFileType(co) == FILE_TYPE_CHAR && GetConsoleMode(co, &t))
		{
			if (event.key && event.key != KEY_LSHIFT && event.key != KEY_RSHIFT)
			{
#ifdef _UNICODE
				WriteConsole(co, &evt.uChar.UnicodeChar, 1, &t, NULL);
#else
				WriteConsole(co, &evt.uChar.AsciiChar, 1 , &t, NULL);
#endif
			}
			if (evt.wVirtualKeyCode == VK_BACK
				&& GetConsoleScreenBufferInfo(co,&CSBI))
			{
				WriteConsoleOutputCharacterA(co, " ",1, CSBI.dwCursorPosition, &t);
			}
		}
	}
	if (event.key) D_PostEvent(&event);
}

void I_GetConsoleEvents(void)
{
	HANDLE ci = GetStdHandle(STD_INPUT_HANDLE);
	HANDLE co = GetStdHandle(STD_OUTPUT_HANDLE);
	INPUT_RECORD input;
	DWORD t;

	while (I_ReadyConsole(ci) && ReadConsoleInput(ci, &input, 1, &t) && t)
	{
		switch (input.EventType)
		{
			case KEY_EVENT:
				Impl_HandleKeyboardConsoleEvent(input.Event.KeyEvent, co);
				break;
			case MOUSE_EVENT:
			case WINDOW_BUFFER_SIZE_EVENT:
			case MENU_EVENT:
			case FOCUS_EVENT:
				break;
		}
	}
}

static void I_StartupConsole(void)
{
	HANDLE ci, co;
	const INT32 ded = M_CheckParm("-dedicated");
	BOOL gotConsole = FALSE;
	if (M_CheckParm("-console") || ded)
		gotConsole = AllocConsole();
#ifdef _DEBUG
	else if (M_CheckParm("-noconsole") && !ded)
#else
	else if (!M_CheckParm("-console") && !ded)
#endif
	{
		FreeConsole();
		gotConsole = FALSE;
	}

	if (gotConsole)
	{
		SetConsoleTitleA("SRB2 Console");
		consolevent = SDL_TRUE;
	}

	//Let get the real console HANDLE, because Mingw's Bash is bad!
	ci = CreateFile(TEXT("CONIN$") ,               GENERIC_READ, FILE_SHARE_READ,  NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
	co = CreateFile(TEXT("CONOUT$"), GENERIC_WRITE|GENERIC_READ, FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
	if (ci != INVALID_HANDLE_VALUE)
	{
		const DWORD CM = ENABLE_LINE_INPUT|ENABLE_ECHO_INPUT|ENABLE_PROCESSED_INPUT;
		SetStdHandle(STD_INPUT_HANDLE, ci);
		if (GetFileType(ci) == FILE_TYPE_CHAR)
			SetConsoleMode(ci, CM); //default mode but no ENABLE_MOUSE_INPUT
	}
	if (co != INVALID_HANDLE_VALUE)
	{
		SetStdHandle(STD_OUTPUT_HANDLE, co);
		SetStdHandle(STD_ERROR_HANDLE, co);
	}
}
static inline void I_ShutdownConsole(void){}
#else
void I_GetConsoleEvents(void){}
static inline void I_StartupConsole(void)
{
#ifdef _DEBUG
	consolevent = !M_CheckParm("-noconsole");
#else
	consolevent = M_CheckParm("-console");
#endif

	framebuffer = M_CheckParm("-framebuffer");

	if (framebuffer)
		consolevent = SDL_FALSE;
}
static inline void I_ShutdownConsole(void){}
#endif

//
// StartupKeyboard
//
static void I_RegisterSignals (void)
{
#ifdef SIGINT
	signal(SIGINT , quit_handler);
#endif
#ifdef SIGBREAK
	signal(SIGBREAK , quit_handler);
#endif
#ifdef SIGTERM
	signal(SIGTERM , quit_handler);
#endif

	// If these defines don't exist,
	// then compilation would have failed above us...
#ifndef NEWSIGNALHANDLER
	signal(SIGILL , signal_handler);
	signal(SIGSEGV , signal_handler);
	signal(SIGABRT , signal_handler);
	signal(SIGFPE , signal_handler);
#endif
}

#ifdef NEWSIGNALHANDLER
static void signal_handler_child(INT32 num)
{
#ifdef UNIXBACKTRACE
	write_backtrace(num);
#endif

	signal(num, SIG_DFL);               //default signal action
	raise(num);
}

static void I_RegisterChildSignals(void)
{
	// If these defines don't exist,
	// then compilation would have failed above us...
	signal(SIGILL , signal_handler_child);
	signal(SIGSEGV , signal_handler_child);
	signal(SIGABRT , signal_handler_child);
	signal(SIGFPE , signal_handler_child);
}
#endif

//
//I_OutputMsg
//
void I_OutputMsg(const char *fmt, ...)
{
	size_t len;
	char txt[8192];
	va_list  argptr;

	va_start(argptr,fmt);
	vsprintf(txt, fmt, argptr);
	va_end(argptr);

#ifdef HAVE_TTF
	if (TTF_WasInit()) I_TTFDrawText(currentfont, solid, DEFAULTFONTFGR, DEFAULTFONTFGG, DEFAULTFONTFGB,  DEFAULTFONTFGA,
	DEFAULTFONTBGR, DEFAULTFONTBGG, DEFAULTFONTBGB, DEFAULTFONTBGA, txt);
#endif

#if defined (_WIN32) && defined (_MSC_VER)
	OutputDebugStringA(txt);
#endif

	len = strlen(txt);

#ifdef LOGMESSAGES
	if (logstream)
	{
		size_t d = fwrite(txt, len, 1, logstream);
		fflush(logstream);
		(void)d;
	}
#endif

#if defined (_WIN32)
#ifdef DEBUGFILE
	if (debugfile != stderr)
#endif
	{
		HANDLE co = GetStdHandle(STD_OUTPUT_HANDLE);
		DWORD bytesWritten;

		if (co == INVALID_HANDLE_VALUE)
			return;

		if (GetFileType(co) == FILE_TYPE_CHAR && GetConsoleMode(co, &bytesWritten))
		{
			static COORD coordNextWrite = {0,0};
			LPVOID oldLines = NULL;
			INT oldLength;
			CONSOLE_SCREEN_BUFFER_INFO csbi;

			// Save the lines that we're going to obliterate.
			GetConsoleScreenBufferInfo(co, &csbi);
			oldLength = csbi.dwSize.X * (csbi.dwCursorPosition.Y - coordNextWrite.Y) + csbi.dwCursorPosition.X - coordNextWrite.X;

			if (oldLength > 0)
			{
				LPVOID blank = malloc(oldLength);
				if (!blank) return;
				memset(blank, ' ', oldLength); // Blank out.
				oldLines = malloc(oldLength*sizeof(TCHAR));
				if (!oldLines)
				{
					free(blank);
					return;
				}

				ReadConsoleOutputCharacter(co, oldLines, oldLength, coordNextWrite, &bytesWritten);

				// Move to where we what to print - which is where we would've been,
				// had console input not been in the way,
				SetConsoleCursorPosition(co, coordNextWrite);

				WriteConsoleA(co, blank, oldLength, &bytesWritten, NULL);
				free(blank);

				// And back to where we want to print again.
				SetConsoleCursorPosition(co, coordNextWrite);
			}

			// Actually write the string now!
			WriteConsoleA(co, txt, (DWORD)len, &bytesWritten, NULL);

			// Next time, output where we left off.
			GetConsoleScreenBufferInfo(co, &csbi);
			coordNextWrite = csbi.dwCursorPosition;

			// Restore what was overwritten.
			if (oldLines && entering_con_command)
				WriteConsole(co, oldLines, oldLength, &bytesWritten, NULL);
			if (oldLines) free(oldLines);
		}
		else // Redirected to a file.
			WriteFile(co, txt, (DWORD)len, &bytesWritten, NULL);
	}
#else
#ifdef HAVE_TERMIOS
	if (consolevent)
	{
		tty_Hide();
	}
#endif

	if (!framebuffer)
		fprintf(stderr, "%s", txt);
#ifdef HAVE_TERMIOS
	if (consolevent)
	{
		tty_Show();
	}
#endif

	// 2004-03-03 AJR Since not all messages end in newline, some were getting displayed late.
	if (!framebuffer)
		fflush(stderr);

#endif
}

//
// I_GetKey
//
INT32 I_GetKey (void)
{
	// Warning: I_GetKey empties the event queue till next keypress
	event_t *ev;
	INT32 rc = 0;

	// return the first keypress from the event queue
	for (; eventtail != eventhead; eventtail = (eventtail+1)&(MAXEVENTS-1))
	{
		ev = &events[eventtail];
		if (ev->type == ev_keydown || ev->type == ev_console)
		{
			rc = ev->key;
			continue;
		}
	}

	return rc;
}

//
// I_JoyScale
//
void I_JoyScale(void)
{
	Joystick.bGamepadStyle = cv_joyscale.value==0;
	JoyInfo.scale = Joystick.bGamepadStyle?1:cv_joyscale.value;
}

void I_JoyScale2(void)
{
	Joystick2.bGamepadStyle = cv_joyscale2.value==0;
	JoyInfo2.scale = Joystick2.bGamepadStyle?1:cv_joyscale2.value;
}

// Cheat to get the device index for a joystick handle
INT32 I_GetJoystickDeviceIndex(SDL_Joystick *dev)
{
	INT32 i, count = SDL_NumJoysticks();

	for (i = 0; dev && i < count; i++)
	{
		SDL_Joystick *test = SDL_JoystickOpen(i);
		if (test && test == dev)
			return i;
		else if (JoyInfo.dev != test && JoyInfo2.dev != test)
			SDL_JoystickClose(test);
	}

	return -1;
}

/**	\brief Joystick 1 buttons states
*/
static UINT64 lastjoybuttons = 0;

/**	\brief Joystick 1 hats state
*/
static UINT64 lastjoyhats = 0;

/**	\brief	Shuts down joystick 1


	\return void


*/
void I_ShutdownJoystick(void)
{
	INT32 i;
	event_t event;
	event.type=ev_keyup;
	event.x = 0;
	event.y = 0;

	lastjoybuttons = lastjoyhats = 0;

	// emulate the up of all joystick buttons
	for (i=0;i<JOYBUTTONS;i++)
	{
		event.key=KEY_JOY1+i;
		D_PostEvent(&event);
	}

	// emulate the up of all joystick hats
	for (i=0;i<JOYHATS*4;i++)
	{
		event.key=KEY_HAT1+i;
		D_PostEvent(&event);
	}

	// reset joystick position
	event.type = ev_joystick;
	for (i=0;i<JOYAXISSET; i++)
	{
		event.key = i;
		D_PostEvent(&event);
	}

	joystick_started = 0;
	JoyReset(&JoyInfo);

	// don't shut down the subsystem here, because hotplugging
}

void I_GetJoystickEvents(void)
{
	static event_t event = {0,0,0,0,false};
	INT32 i = 0;
	UINT64 joyhats = 0;
#if 0
	UINT64 joybuttons = 0;
	Sint16 axisx, axisy;
#endif

	if (!joystick_started) return;

	if (!JoyInfo.dev) //I_ShutdownJoystick();
		return;

#if 0
	//faB: look for as much buttons as g_input code supports,
	//  we don't use the others
	for (i = JoyInfo.buttons - 1; i >= 0; i--)
	{
		joybuttons <<= 1;
		if (SDL_JoystickGetButton(JoyInfo.dev,i))
			joybuttons |= 1;
	}

	if (joybuttons != lastjoybuttons)
	{
		INT64 j = 1; // keep only bits that changed since last time
		INT64 newbuttons = joybuttons ^ lastjoybuttons;
		lastjoybuttons = joybuttons;

		for (i = 0; i < JOYBUTTONS; i++, j <<= 1)
		{
			if (newbuttons & j) // button changed state?
			{
				if (joybuttons & j)
					event.type = ev_keydown;
				else
					event.type = ev_keyup;
				event.key = KEY_JOY1 + i;
				D_PostEvent(&event);
			}
		}
	}
#endif

	for (i = JoyInfo.hats - 1; i >= 0; i--)
	{
		Uint8 hat = SDL_JoystickGetHat(JoyInfo.dev, i);

		if (hat & SDL_HAT_UP   ) joyhats|=(UINT64)0x1<<(0 + 4*i);
		if (hat & SDL_HAT_DOWN ) joyhats|=(UINT64)0x1<<(1 + 4*i);
		if (hat & SDL_HAT_LEFT ) joyhats|=(UINT64)0x1<<(2 + 4*i);
		if (hat & SDL_HAT_RIGHT) joyhats|=(UINT64)0x1<<(3 + 4*i);
	}

	if (joyhats != lastjoyhats)
	{
		INT64 j = 1; // keep only bits that changed since last time
		INT64 newhats = joyhats ^ lastjoyhats;
		lastjoyhats = joyhats;

		for (i = 0; i < JOYHATS*4; i++, j <<= 1)
		{
			if (newhats & j) // hat changed state?
			{
				if (joyhats & j)
					event.type = ev_keydown;
				else
					event.type = ev_keyup;
				event.key = KEY_HAT1 + i;
				D_PostEvent(&event);
			}
		}
	}

#if 0
	// send joystick axis positions
	event.type = ev_joystick;

	for (i = JOYAXISSET - 1; i >= 0; i--)
	{
		event.key = i;
		if (i*2 + 1 <= JoyInfo.axises)
			axisx = SDL_JoystickGetAxis(JoyInfo.dev, i*2 + 0);
		else axisx = 0;
		if (i*2 + 2 <= JoyInfo.axises)
			axisy = SDL_JoystickGetAxis(JoyInfo.dev, i*2 + 1);
		else axisy = 0;


		// -32768 to 32767
		axisx = axisx/32;
		axisy = axisy/32;


		if (Joystick.bGamepadStyle)
		{
			// gamepad control type, on or off, live or die
			if (axisx < -(JOYAXISRANGE/2))
				event.x = -1;
			else if (axisx > (JOYAXISRANGE/2))
				event.x = 1;
			else event.x = 0;
			if (axisy < -(JOYAXISRANGE/2))
				event.y = -1;
			else if (axisy > (JOYAXISRANGE/2))
				event.y = 1;
			else event.y = 0;
		}
		else
		{

			axisx = JoyInfo.scale?((axisx/JoyInfo.scale)*JoyInfo.scale):axisx;
			axisy = JoyInfo.scale?((axisy/JoyInfo.scale)*JoyInfo.scale):axisy;

#ifdef SDL_JDEADZONE
			if (-SDL_JDEADZONE <= axisx && axisx <= SDL_JDEADZONE) axisx = 0;
			if (-SDL_JDEADZONE <= axisy && axisy <= SDL_JDEADZONE) axisy = 0;
#endif

			// analog control style , just send the raw data
			event.x = axisx; // x axis
			event.y = axisy; // y axis
		}
		D_PostEvent(&event);
	}
#endif
}

/**	\brief	Open joystick handle

	\param	fname	name of joystick

	\return	axises


*/
static int joy_open(int joyindex)
{
	SDL_Joystick *newdev = NULL;
	int num_joy = 0;

	if (SDL_WasInit(SDL_INIT_JOYSTICK) == 0)
	{
		CONS_Printf(M_GetText("Joystick subsystem not started\n"));
		return -1;
	}

	if (joyindex <= 0)
		return -1;

	num_joy = SDL_NumJoysticks();

	if (num_joy == 0)
	{
		CONS_Printf("%s", M_GetText("Found no joysticks on this system\n"));
		return -1;
	}

	newdev = SDL_JoystickOpen(joyindex-1);

	// Handle the edge case where the device <-> joystick index assignment can change due to hotplugging
	// This indexing is SDL's responsibility and there's not much we can do about it.
	//
	// Example:
	// 1. Plug Controller A   -> Index 0 opened
	// 2. Plug Controller B   -> Index 1 opened
	// 3. Unplug Controller A -> Index 0 closed, Index 1 active
	// 4. Unplug Controller B -> Index 0 inactive, Index 1 closed
	// 5. Plug Controller B   -> Index 0 opened
	// 6. Plug Controller A   -> Index 0 REPLACED, opened as Controller A; Index 1 is now Controller B
	if (JoyInfo.dev)
	{
		if (JoyInfo.dev == newdev // same device, nothing to do
			|| (newdev == NULL && SDL_JoystickGetAttached(JoyInfo.dev))) // we failed, but already have a working device
			return JoyInfo.axises;
		// Else, we're changing devices, so send neutral joy events
		CONS_Debug(DBG_GAMELOGIC, "Joystick1 device is changing; resetting events...\n");
		I_ShutdownJoystick();
	}

	JoyInfo.dev = newdev;

	if (JoyInfo.dev == NULL)
	{
		CONS_Debug(DBG_GAMELOGIC, M_GetText("Joystick1: Couldn't open device - %s\n"), SDL_GetError());
		return -1;
	}
	else
	{
		CONS_Debug(DBG_GAMELOGIC, M_GetText("Joystick1: %s\n"), SDL_JoystickName(JoyInfo.dev));
		JoyInfo.axises = SDL_JoystickNumAxes(JoyInfo.dev);
		if (JoyInfo.axises > JOYAXISSET*2)
			JoyInfo.axises = JOYAXISSET*2;
	/*		if (joyaxes<2)
		{
			I_OutputMsg("Not enought axes?\n");
			return 0;
		}*/

		JoyInfo.buttons = SDL_JoystickNumButtons(JoyInfo.dev);
		if (JoyInfo.buttons > JOYBUTTONS)
			JoyInfo.buttons = JOYBUTTONS;

		JoyInfo.hats = SDL_JoystickNumHats(JoyInfo.dev);
		if (JoyInfo.hats > JOYHATS)
			JoyInfo.hats = JOYHATS;

		JoyInfo.balls = SDL_JoystickNumBalls(JoyInfo.dev);

		//Joystick.bGamepadStyle = !stricmp(SDL_JoystickName(JoyInfo.dev), "pad");

		return JoyInfo.axises;
	}
}

//Joystick2

/**	\brief Joystick 2 buttons states
*/
static UINT64 lastjoy2buttons = 0;

/**	\brief Joystick 2 hats state
*/
static UINT64 lastjoy2hats = 0;

/**	\brief	Shuts down joystick 2


	\return	void
*/
void I_ShutdownJoystick2(void)
{
	INT32 i;
	event_t event;
	event.type = ev_keyup;
	event.x = 0;
	event.y = 0;

	lastjoy2buttons = lastjoy2hats = 0;

	// emulate the up of all joystick buttons
	for (i = 0; i < JOYBUTTONS; i++)
	{
		event.key = KEY_2JOY1 + i;
		D_PostEvent(&event);
	}

	// emulate the up of all joystick hats
	for (i = 0; i < JOYHATS*4; i++)
	{
		event.key = KEY_2HAT1 + i;
		D_PostEvent(&event);
	}

	// reset joystick position
	event.type = ev_joystick2;
	for (i = 0; i < JOYAXISSET; i++)
	{
		event.key = i;
		D_PostEvent(&event);
	}

	joystick2_started = 0;
	JoyReset(&JoyInfo2);

	// don't shut down the subsystem here, because hotplugging
}

void I_GetJoystick2Events(void)
{
	static event_t event = {0,0,0,0,false};
	INT32 i = 0;
	UINT64 joyhats = 0;
#if 0
	INT64 joybuttons = 0;
	INT32 axisx, axisy;
#endif

	if (!joystick2_started)
		return;

	if (!JoyInfo2.dev) //I_ShutdownJoystick2();
		return;


#if 0
	//faB: look for as much buttons as g_input code supports,
	//  we don't use the others
	for (i = JoyInfo2.buttons - 1; i >= 0; i--)
	{
		joybuttons <<= 1;
		if (SDL_JoystickGetButton(JoyInfo2.dev,i))
			joybuttons |= 1;
	}

	if (joybuttons != lastjoy2buttons)
	{
		INT64 j = 1; // keep only bits that changed since last time
		INT64 newbuttons = joybuttons ^ lastjoy2buttons;
		lastjoy2buttons = joybuttons;

		for (i = 0; i < JOYBUTTONS; i++, j <<= 1)
		{
			if (newbuttons & j) // button changed state?
			{
				if (joybuttons & j)
					event.type = ev_keydown;
				else
					event.type = ev_keyup;
				event.key = KEY_2JOY1 + i;
				D_PostEvent(&event);
			}
		}
	}
#endif

	for (i = JoyInfo2.hats - 1; i >= 0; i--)
	{
		Uint8 hat = SDL_JoystickGetHat(JoyInfo2.dev, i);

		if (hat & SDL_HAT_UP   ) joyhats|=(UINT64)0x1<<(0 + 4*i);
		if (hat & SDL_HAT_DOWN ) joyhats|=(UINT64)0x1<<(1 + 4*i);
		if (hat & SDL_HAT_LEFT ) joyhats|=(UINT64)0x1<<(2 + 4*i);
		if (hat & SDL_HAT_RIGHT) joyhats|=(UINT64)0x1<<(3 + 4*i);
	}

	if (joyhats != lastjoy2hats)
	{
		INT64 j = 1; // keep only bits that changed since last time
		INT64 newhats = joyhats ^ lastjoy2hats;
		lastjoy2hats = joyhats;

		for (i = 0; i < JOYHATS*4; i++, j <<= 1)
		{
			if (newhats & j) // hat changed state?
			{
				if (joyhats & j)
					event.type = ev_keydown;
				else
					event.type = ev_keyup;
				event.key = KEY_2HAT1 + i;
				D_PostEvent(&event);
			}
		}
	}

#if 0
	// send joystick axis positions
	event.type = ev_joystick2;

	for (i = JOYAXISSET - 1; i >= 0; i--)
	{
		event.key = i;
		if (i*2 + 1 <= JoyInfo2.axises)
			axisx = SDL_JoystickGetAxis(JoyInfo2.dev, i*2 + 0);
		else axisx = 0;
		if (i*2 + 2 <= JoyInfo2.axises)
			axisy = SDL_JoystickGetAxis(JoyInfo2.dev, i*2 + 1);
		else axisy = 0;

		// -32768 to 32767
		axisx = axisx/32;
		axisy = axisy/32;

		if (Joystick2.bGamepadStyle)
		{
			// gamepad control type, on or off, live or die
			if (axisx < -(JOYAXISRANGE/2))
				event.x = -1;
			else if (axisx > (JOYAXISRANGE/2))
				event.x = 1;
			else
				event.x = 0;
			if (axisy < -(JOYAXISRANGE/2))
				event.y = -1;
			else if (axisy > (JOYAXISRANGE/2))
				event.y = 1;
			else
				event.y = 0;
		}
		else
		{

			axisx = JoyInfo2.scale?((axisx/JoyInfo2.scale)*JoyInfo2.scale):axisx;
			axisy = JoyInfo2.scale?((axisy/JoyInfo2.scale)*JoyInfo2.scale):axisy;

#ifdef SDL_JDEADZONE
			if (-SDL_JDEADZONE <= axisx && axisx <= SDL_JDEADZONE) axisx = 0;
			if (-SDL_JDEADZONE <= axisy && axisy <= SDL_JDEADZONE) axisy = 0;
#endif

			// analog control style , just send the raw data
			event.x = axisx; // x axis
			event.y = axisy; // y axis
		}
		D_PostEvent(&event);
	}
#endif
}

/**	\brief	Open joystick handle

	\param	fname	name of joystick

	\return	axises


*/
static int joy_open2(int joyindex)
{
	SDL_Joystick *newdev = NULL;
	int num_joy = 0;

	if (SDL_WasInit(SDL_INIT_JOYSTICK) == 0)
	{
		CONS_Printf(M_GetText("Joystick subsystem not started\n"));
		return -1;
	}

	if (joyindex <= 0)
		return -1;

	num_joy = SDL_NumJoysticks();

	if (num_joy == 0)
	{
		CONS_Printf("%s", M_GetText("Found no joysticks on this system\n"));
		return -1;
	}

	newdev = SDL_JoystickOpen(joyindex-1);

	// Handle the edge case where the device <-> joystick index assignment can change due to hotplugging
	// This indexing is SDL's responsibility and there's not much we can do about it.
	//
	// Example:
	// 1. Plug Controller A   -> Index 0 opened
	// 2. Plug Controller B   -> Index 1 opened
	// 3. Unplug Controller A -> Index 0 closed, Index 1 active
	// 4. Unplug Controller B -> Index 0 inactive, Index 1 closed
	// 5. Plug Controller B   -> Index 0 opened
	// 6. Plug Controller A   -> Index 0 REPLACED, opened as Controller A; Index 1 is now Controller B
	if (JoyInfo2.dev)
	{
		if (JoyInfo2.dev == newdev // same device, nothing to do
			|| (newdev == NULL && SDL_JoystickGetAttached(JoyInfo2.dev))) // we failed, but already have a working device
			return JoyInfo.axises;
		// Else, we're changing devices, so send neutral joy events
		CONS_Debug(DBG_GAMELOGIC, "Joystick2 device is changing; resetting events...\n");
		I_ShutdownJoystick2();
	}

	JoyInfo2.dev = newdev;

	if (JoyInfo2.dev == NULL)
	{
		CONS_Debug(DBG_GAMELOGIC, M_GetText("Joystick2: couldn't open device - %s\n"), SDL_GetError());
		return -1;
	}
	else
	{
		CONS_Debug(DBG_GAMELOGIC, M_GetText("Joystick2: %s\n"), SDL_JoystickName(JoyInfo2.dev));
		JoyInfo2.axises = SDL_JoystickNumAxes(JoyInfo2.dev);
		if (JoyInfo2.axises > JOYAXISSET*2)
			JoyInfo2.axises = JOYAXISSET*2;
/*		if (joyaxes<2)
		{
			I_OutputMsg("Not enought axes?\n");
			return 0;
		}*/

		JoyInfo2.buttons = SDL_JoystickNumButtons(JoyInfo2.dev);
		if (JoyInfo2.buttons > JOYBUTTONS)
			JoyInfo2.buttons = JOYBUTTONS;

		JoyInfo2.hats = SDL_JoystickNumHats(JoyInfo2.dev);
		if (JoyInfo2.hats > JOYHATS)
			JoyInfo2.hats = JOYHATS;

		JoyInfo2.balls = SDL_JoystickNumBalls(JoyInfo2.dev);

		//Joystick.bGamepadStyle = !stricmp(SDL_JoystickName(JoyInfo2.dev), "pad");

		return JoyInfo2.axises;
	}
}

//
// I_InitJoystick
//
void I_InitJoystick(void)
{
	SDL_Joystick *newjoy = NULL;

	//I_ShutdownJoystick();
	if (M_CheckParm("-nojoy"))
		return;

	if (M_CheckParm("-noxinput"))
		SDL_SetHintWithPriority("SDL_XINPUT_ENABLED", "0", SDL_HINT_OVERRIDE);

	if (M_CheckParm("-nohidapi"))
		SDL_SetHintWithPriority("SDL_JOYSTICK_HIDAPI", "0", SDL_HINT_OVERRIDE);

	if (SDL_WasInit(SDL_INIT_JOYSTICK) == 0)
	{
		CONS_Printf("I_InitJoystick()...\n");

		if (SDL_InitSubSystem(SDL_INIT_JOYSTICK) == -1)
		{
			CONS_Printf(M_GetText("Couldn't initialize joystick: %s\n"), SDL_GetError());
			return;
		}
	}

	if (cv_usejoystick.value)
		newjoy = SDL_JoystickOpen(cv_usejoystick.value-1);

	if (newjoy && JoyInfo2.dev == newjoy) // don't override an active device
		cv_usejoystick.value = I_GetJoystickDeviceIndex(JoyInfo.dev) + 1;
	else if (newjoy && joy_open(cv_usejoystick.value) != -1)
	{
		// SDL's device indexes are unstable, so cv_usejoystick may not match
		// the actual device index. So let's cheat a bit and find the device's current index.
		JoyInfo.oldjoy = I_GetJoystickDeviceIndex(JoyInfo.dev) + 1;
		joystick_started = 1;
	}
	else
	{
		if (JoyInfo.oldjoy)
			I_ShutdownJoystick();
		cv_usejoystick.value = 0;
		joystick_started = 0;
	}

	if (JoyInfo.dev != newjoy && JoyInfo2.dev != newjoy)
		SDL_JoystickClose(newjoy);
}

void I_InitJoystick2(void)
{
	SDL_Joystick *newjoy = NULL;

	//I_ShutdownJoystick2();
	if (M_CheckParm("-nojoy"))
		return;

	if (M_CheckParm("-noxinput"))
		SDL_SetHintWithPriority("SDL_XINPUT_ENABLED", "0", SDL_HINT_OVERRIDE);

	if (M_CheckParm("-nohidapi"))
		SDL_SetHintWithPriority("SDL_JOYSTICK_HIDAPI", "0", SDL_HINT_OVERRIDE);

	if (SDL_WasInit(SDL_INIT_JOYSTICK) == 0)
	{
		CONS_Printf("I_InitJoystick2()...\n");

		if (SDL_InitSubSystem(SDL_INIT_JOYSTICK) == -1)
		{
			CONS_Printf(M_GetText("Couldn't initialize joystick: %s\n"), SDL_GetError());
			return;
		}
	}

	if (cv_usejoystick2.value)
		newjoy = SDL_JoystickOpen(cv_usejoystick2.value-1);

	if (newjoy && JoyInfo.dev == newjoy) // don't override an active device
		cv_usejoystick2.value = I_GetJoystickDeviceIndex(JoyInfo2.dev) + 1;
	else if (newjoy && joy_open2(cv_usejoystick2.value) != -1)
	{
		// SDL's device indexes are unstable, so cv_usejoystick may not match
		// the actual device index. So let's cheat a bit and find the device's current index.
		JoyInfo2.oldjoy = I_GetJoystickDeviceIndex(JoyInfo2.dev) + 1;
		joystick2_started = 1;
	}
	else
	{
		if (JoyInfo2.oldjoy)
			I_ShutdownJoystick2();
		cv_usejoystick2.value = 0;
		joystick2_started = 0;
	}

	if (JoyInfo.dev != newjoy && JoyInfo2.dev != newjoy)
		SDL_JoystickClose(newjoy);
}

static void I_ShutdownInput(void)
{
	// Yes, the name is misleading: these send neutral events to
	// clean up the unplugged joystick's input
	// Note these methods are internal to this file, not called elsewhere.
	I_ShutdownJoystick();
	I_ShutdownJoystick2();

	if (SDL_WasInit(SDL_INIT_JOYSTICK) == SDL_INIT_JOYSTICK)
	{
		CONS_Printf("Shutting down joy system\n");
		SDL_QuitSubSystem(SDL_INIT_JOYSTICK);
		I_OutputMsg("I_Joystick: SDL's Joystick system has been shutdown\n");
	}
}

INT32 I_NumJoys(void)
{
	INT32 numjoy = 0;
	if (SDL_WasInit(SDL_INIT_JOYSTICK) == SDL_INIT_JOYSTICK)
		numjoy = SDL_NumJoysticks();
	return numjoy;
}

static char joyname[255]; // joystick name is straight from the driver

const char *I_GetJoyName(INT32 joyindex)
{
	const char *tempname = NULL;
	joyname[0] = 0;
	joyindex--; //SDL's Joystick System starts at 0, not 1
	if (SDL_WasInit(SDL_INIT_JOYSTICK) == SDL_INIT_JOYSTICK)
	{
		tempname = SDL_JoystickNameForIndex(joyindex);
		if (tempname)
			strncpy(joyname, tempname, 255);
	}
	return joyname;
}

#ifndef NOMUMBLE
#ifdef HAVE_MUMBLE
// Best Mumble positional audio settings:
// Minimum distance 3.0 m
// Bloom 175%
// Maximum distance 80.0 m
// Minimum volume 50%
#define DEG2RAD (0.017453292519943295769236907684883l) // TAU/360 or PI/180
#define MUMBLEUNIT (64.0f) // FRACUNITS in a Meter

static struct {
#ifdef WINMUMBLE
	UINT32 uiVersion;
	DWORD uiTick;
#else
	Uint32 uiVersion;
	Uint32 uiTick;
#endif
	float fAvatarPosition[3];
	float fAvatarFront[3];
	float fAvatarTop[3]; // defaults to Y-is-up (only used for leaning)
	wchar_t name[256]; // game name
	float fCameraPosition[3];
	float fCameraFront[3];
	float fCameraTop[3]; // defaults to Y-is-up (only used for leaning)
	wchar_t identity[256]; // player id
#ifdef WINMUMBLE
	UINT32 context_len;
#else
	Uint32 context_len;
#endif
	unsigned char context[256]; // server/team
	wchar_t description[2048]; // game description
} *mumble = NULL;
#endif // HAVE_MUMBLE

static void I_SetupMumble(void)
{
#ifdef WINMUMBLE
	HANDLE hMap = OpenFileMappingW(FILE_MAP_ALL_ACCESS, FALSE, L"MumbleLink");
	if (!hMap)
		return;

	mumble = MapViewOfFile(hMap, FILE_MAP_ALL_ACCESS, 0, 0, sizeof(*mumble));
	if (!mumble)
		CloseHandle(hMap);
#elif defined (HAVE_SHM)
	int shmfd;
	char memname[256];

	snprintf(memname, 256, "/MumbleLink.%d", getuid());
	shmfd = shm_open(memname, O_RDWR, S_IRUSR | S_IWUSR);

	if(shmfd < 0)
		return;

	mumble = mmap(NULL, sizeof(*mumble), PROT_READ | PROT_WRITE, MAP_SHARED, shmfd, 0);
	if (mumble == MAP_FAILED)
		mumble = NULL;
#endif
}

void I_UpdateMumble(const mobj_t *mobj, const listener_t listener)
{
#ifdef HAVE_MUMBLE
	double angle;
	fixed_t anglef;

	if (!mumble)
		return;

	if(mumble->uiVersion != 2) {
		wcsncpy(mumble->name, L"SRB2 "VERSIONSTRINGW, 256);
		wcsncpy(mumble->description, L"Sonic Robo Blast 2 with integrated Mumble Link support.", 2048);
		mumble->uiVersion = 2;
	}
	mumble->uiTick++;

	if (!netgame || gamestate != GS_LEVEL) { // Zero out, but never delink.
		mumble->fAvatarPosition[0] = mumble->fAvatarPosition[1] = mumble->fAvatarPosition[2] = 0.0f;
		mumble->fAvatarFront[0] = 1.0f;
		mumble->fAvatarFront[1] = mumble->fAvatarFront[2] = 0.0f;
		mumble->fCameraPosition[0] = mumble->fCameraPosition[1] = mumble->fCameraPosition[2] = 0.0f;
		mumble->fCameraFront[0] = 1.0f;
		mumble->fCameraFront[1] = mumble->fCameraFront[2] = 0.0f;
		return;
	}

	{
		UINT8 *p = mumble->context;
		WRITEMEM(p, server_context, 8);
		WRITEINT16(p, gamemap);
		mumble->context_len = (UINT32)(p - mumble->context);
	}

	if (mobj) {
		mumble->fAvatarPosition[0] = FIXED_TO_FLOAT(mobj->x) / MUMBLEUNIT;
		mumble->fAvatarPosition[1] = FIXED_TO_FLOAT(mobj->z) / MUMBLEUNIT;
		mumble->fAvatarPosition[2] = FIXED_TO_FLOAT(mobj->y) / MUMBLEUNIT;

		anglef = AngleFixed(mobj->angle);
		angle = FIXED_TO_FLOAT(anglef)*DEG2RAD;
		mumble->fAvatarFront[0] = (float)cos(angle);
		mumble->fAvatarFront[1] = 0.0f;
		mumble->fAvatarFront[2] = (float)sin(angle);
	} else {
		mumble->fAvatarPosition[0] = mumble->fAvatarPosition[1] = mumble->fAvatarPosition[2] = 0.0f;
		mumble->fAvatarFront[0] = 1.0f;
		mumble->fAvatarFront[1] = mumble->fAvatarFront[2] = 0.0f;
	}

	mumble->fCameraPosition[0] = FIXED_TO_FLOAT(listener.x) / MUMBLEUNIT;
	mumble->fCameraPosition[1] = FIXED_TO_FLOAT(listener.z) / MUMBLEUNIT;
	mumble->fCameraPosition[2] = FIXED_TO_FLOAT(listener.y) / MUMBLEUNIT;

	anglef = AngleFixed(listener.angle);
	angle = FIXED_TO_FLOAT(anglef)*DEG2RAD;
	mumble->fCameraFront[0] = (float)cos(angle);
	mumble->fCameraFront[1] = 0.0f;
	mumble->fCameraFront[2] = (float)sin(angle);
#else
	(void)mobj;
	(void)listener;
#endif // HAVE_MUMBLE
}
#undef WINMUMBLE
#endif // NOMUMBLE

#ifdef HAVE_TERMIOS

void I_GetMouseEvents(void)
{
	static UINT8 mdata[5];
	static INT32 i = 0,om2b = 0;
	INT32 di, j, mlp, button;
	event_t event;
	const INT32 mswap[8] = {0, 4, 1, 5, 2, 6, 3, 7};

	if (!mouse2_started) return;
	for (mlp = 0; mlp < 20; mlp++)
	{
		for (; i < 5; i++)
		{
			di = read(fdmouse2, mdata+i, 1);
			if (di == -1) return;
		}
		if ((mdata[0] & 0xf8) != 0x80)
		{
			for (j = 1; j < 5; j++)
				if ((mdata[j] & 0xf8) == 0x80)
					for (i = 0; i < 5-j; i++) // shift
						mdata[i] = mdata[i+j];
			if (i < 5) continue;
		}
		else
		{
			button = mswap[~mdata[0] & 0x07];
			for (j = 0; j < MOUSEBUTTONS; j++)
			{
				if (om2b & (1<<j))
				{
					if (!(button & (1<<j))) //keyup
					{
						event.type = ev_keyup;
						event.key = KEY_2MOUSE1+j;
						D_PostEvent(&event);
						om2b ^= 1 << j;
					}
				}
				else
				{
					if (button & (1<<j))
					{
						event.type = ev_keydown;
						event.key = KEY_2MOUSE1+j;
						D_PostEvent(&event);
						om2b ^= 1 << j;
					}
				}
			}
			event.x = ((SINT8)mdata[1])+((SINT8)mdata[3]);
			event.y = ((SINT8)mdata[2])+((SINT8)mdata[4]);
			if (event.x && event.y)
			{
				event.type = ev_mouse2;
				event.key = 0;
				D_PostEvent(&event);
			}
		}
		i = 0;
	}
}

//
// I_ShutdownMouse2
//
static void I_ShutdownMouse2(void)
{
	if (fdmouse2 != -1) close(fdmouse2);
	mouse2_started = 0;
}
#elif defined (_WIN32)

static HANDLE mouse2filehandle = INVALID_HANDLE_VALUE;

static void I_ShutdownMouse2(void)
{
	event_t event;
	INT32 i;

	if (mouse2filehandle == INVALID_HANDLE_VALUE)
		return;

	SetCommMask(mouse2filehandle, 0);

	EscapeCommFunction(mouse2filehandle, CLRDTR);
	EscapeCommFunction(mouse2filehandle, CLRRTS);

	PurgeComm(mouse2filehandle, PURGE_TXABORT | PURGE_RXABORT |
			  PURGE_TXCLEAR | PURGE_RXCLEAR);

	CloseHandle(mouse2filehandle);

	// emulate the up of all mouse buttons
	for (i = 0; i < MOUSEBUTTONS; i++)
	{
		event.type = ev_keyup;
		event.key = KEY_2MOUSE1+i;
		D_PostEvent(&event);
	}

	mouse2filehandle = INVALID_HANDLE_VALUE;
}

#define MOUSECOMBUFFERSIZE 256
static INT32 handlermouse2x,handlermouse2y,handlermouse2buttons;

static void I_PoolMouse2(void)
{
	UINT8 buffer[MOUSECOMBUFFERSIZE];
	COMSTAT ComStat;
	DWORD dwErrorFlags;
	DWORD dwLength;
	char dx,dy;

	static INT32 bytenum;
	static UINT8 combytes[4];
	DWORD i;

	ClearCommError(mouse2filehandle, &dwErrorFlags, &ComStat);
	dwLength = min(MOUSECOMBUFFERSIZE, ComStat.cbInQue);

	if (dwLength <= 0)
		return;

	if (!ReadFile(mouse2filehandle, buffer, dwLength, &dwLength, NULL))
	{
		CONS_Alert(CONS_WARNING, "%s", M_GetText("Read Error on secondary mouse port\n"));
		return;
	}

	// parse the mouse packets
	for (i = 0; i < dwLength; i++)
	{
		if ((buffer[i] & 64)== 64)
			bytenum = 0;

		if (bytenum < 4)
			combytes[bytenum] = buffer[i];
		bytenum++;

		if (bytenum == 1)
		{
			handlermouse2buttons &= ~3;
			handlermouse2buttons |= ((combytes[0] & (32+16)) >> 4);
		}
		else if (bytenum == 3)
		{
			dx = (char)((combytes[0] &  3) << 6);
			dy = (char)((combytes[0] & 12) << 4);
			dx = (char)(dx + combytes[1]);
			dy = (char)(dy + combytes[2]);
			handlermouse2x+= dx;
			handlermouse2y+= dy;
		}
		else if (bytenum == 4) // fourth UINT8 (logitech mouses)
		{
			if (buffer[i] & 32)
				handlermouse2buttons |= 4;
			else
				handlermouse2buttons &= ~4;
		}
	}
}

void I_GetMouseEvents(void)
{
	static UINT8 lastbuttons2 = 0; //mouse movement
	event_t event;

	if (mouse2filehandle == INVALID_HANDLE_VALUE)
		return;

	I_PoolMouse2();
	// post key event for buttons
	if (handlermouse2buttons != lastbuttons2)
	{
		INT32 i, j = 1, k;
		k = (handlermouse2buttons ^ lastbuttons2); // only changed bit to 1
		lastbuttons2 = (UINT8)handlermouse2buttons;

		for (i = 0; i < MOUSEBUTTONS; i++, j <<= 1)
			if (k & j)
			{
				if (handlermouse2buttons & j)
					event.type = ev_keydown;
				else
					event.type = ev_keyup;
				event.key = KEY_2MOUSE1+i;
				D_PostEvent(&event);
			}
	}

	if (handlermouse2x != 0 || handlermouse2y != 0)
	{
		event.type = ev_mouse2;
		event.key = 0;
//		event.key = buttons; // not needed
		event.x = handlermouse2x << 1;
		event.y = handlermouse2y << 1;
		handlermouse2x = 0;
		handlermouse2y = 0;

		D_PostEvent(&event);
	}
}
#else
void I_GetMouseEvents(void){};
#endif

//
// I_StartupMouse2
//
void I_StartupMouse2(void)
{
#ifdef HAVE_TERMIOS
	struct termios m2tio;
	size_t i;
	INT32 dtr = -1, rts = -1;;
	I_ShutdownMouse2();
	if (cv_usemouse2.value == 0) return;
	if ((fdmouse2 = open(cv_mouse2port.string, O_RDONLY|O_NONBLOCK|O_NOCTTY)) == -1)
	{
		CONS_Printf(M_GetText("Error opening %s!\n"), cv_mouse2port.string);
		return;
	}
	tcflush(fdmouse2, TCIOFLUSH);
	m2tio.c_iflag = IGNBRK;
	m2tio.c_oflag = 0;
	m2tio.c_cflag = CREAD|CLOCAL|HUPCL|CS8|CSTOPB|B1200;
	m2tio.c_lflag = 0;
	m2tio.c_cc[VTIME] = 0;
	m2tio.c_cc[VMIN] = 1;
	tcsetattr(fdmouse2, TCSANOW, &m2tio);
	for (i = 0; i < strlen(cv_mouse2opt.string); i++)
	{
		if (toupper(cv_mouse2opt.string[i]) == 'D')
		{
			if (cv_mouse2opt.string[i+1] == '-')
				dtr = 0;
			else
				dtr = 1;
		}
		if (toupper(cv_mouse2opt.string[i]) == 'R')
		{
			if (cv_mouse2opt.string[i+1] == '-')
				rts = 0;
			else
				rts = 1;
		}
		if (dtr != -1 || rts != -1)
		{
			INT32 c;
			if (!ioctl(fdmouse2, TIOCMGET, &c))
			{
				if (!dtr)
					c &= ~TIOCM_DTR;
				else if (dtr > 0)
					c |= TIOCM_DTR;
			}
			if (!rts)
				c &= ~TIOCM_RTS;
			else if (rts > 0)
				c |= TIOCM_RTS;
			ioctl(fdmouse2, TIOCMSET, &c);
		}
	}
	mouse2_started = 1;
	I_AddExitFunc(I_ShutdownMouse2);
#elif defined (_WIN32)
	DCB dcb;

	if (mouse2filehandle != INVALID_HANDLE_VALUE)
		I_ShutdownMouse2();

	if (cv_usemouse2.value == 0)
		return;

	if (mouse2filehandle == INVALID_HANDLE_VALUE)
	{
		// COM file handle
		mouse2filehandle = CreateFileA(cv_mouse2port.string, GENERIC_READ | GENERIC_WRITE,
									   0,                     // exclusive access
									   NULL,                  // no security attrs
									   OPEN_EXISTING,
									   FILE_ATTRIBUTE_NORMAL,
									   NULL);
		if (mouse2filehandle == INVALID_HANDLE_VALUE)
		{
			INT32 e = GetLastError();
			if (e == 5)
				CONS_Alert(CONS_ERROR, M_GetText("Can't open %s: Access denied\n"), cv_mouse2port.string);
			else
				CONS_Alert(CONS_ERROR, M_GetText("Can't open %s: error %d\n"), cv_mouse2port.string, e);
			return;
		}
	}

	// getevent when somthing happens
	//SetCommMask(mouse2filehandle, EV_RXCHAR);

	// buffers
	SetupComm(mouse2filehandle, MOUSECOMBUFFERSIZE, MOUSECOMBUFFERSIZE);

	// purge buffers
	PurgeComm(mouse2filehandle, PURGE_TXABORT | PURGE_RXABORT
			  | PURGE_TXCLEAR | PURGE_RXCLEAR);

	// setup port to 1200 7N1
	dcb.DCBlength = sizeof (DCB);

	GetCommState(mouse2filehandle, &dcb);

	dcb.BaudRate = CBR_1200;
	dcb.ByteSize = 7;
	dcb.Parity = NOPARITY;
	dcb.StopBits = ONESTOPBIT;

	dcb.fDtrControl = DTR_CONTROL_ENABLE;
	dcb.fRtsControl = RTS_CONTROL_ENABLE;

	dcb.fBinary = TRUE;
	dcb.fParity = TRUE;

	SetCommState(mouse2filehandle, &dcb);
	I_AddExitFunc(I_ShutdownMouse2);
#endif
}

//
// I_Tactile
//
void I_Tactile(FFType pFFType, const JoyFF_t *FFEffect)
{
	// UNUSED.
	(void)pFFType;
	(void)FFEffect;
}

void I_Tactile2(FFType pFFType, const JoyFF_t *FFEffect)
{
	// UNUSED.
	(void)pFFType;
	(void)FFEffect;
}

/**	\brief empty ticcmd for player 1
*/
static ticcmd_t emptycmd;

ticcmd_t *I_BaseTiccmd(void)
{
	return &emptycmd;
}

/**	\brief empty ticcmd for player 2
*/
static ticcmd_t emptycmd2;

ticcmd_t *I_BaseTiccmd2(void)
{
	return &emptycmd2;
}

//
// I_GetTime
// returns time in 1/TICRATE second tics
//

static Uint64 timer_frequency;

precise_t I_GetPreciseTime(void)
{
	return SDL_GetPerformanceCounter();
}

UINT64 I_GetPrecisePrecision(void)
{
	return SDL_GetPerformanceFrequency();
}

static UINT32 frame_rate;

static double frame_frequency;
static UINT64 frame_epoch;
static double elapsed_frames;

static void I_InitFrameTime(const UINT64 now, const UINT32 cap)
{
	frame_rate = cap;
	frame_epoch = now;

	//elapsed_frames = 0.0;

	if (frame_rate == 0)
	{
		// Shouldn't be used, but just in case...?
		frame_frequency = 1.0;
		return;
	}

	frame_frequency = timer_frequency / (double)frame_rate;
}

double I_GetFrameTime(void)
{
	const UINT64 now = SDL_GetPerformanceCounter();
	const UINT32 cap = R_GetFramerateCap();

	if (cap != frame_rate)
	{
		// Maybe do this in a OnChange function for cv_fpscap?
		I_InitFrameTime(now, cap);
	}

	if (frame_rate == 0)
	{
		// Always advance a frame.
		elapsed_frames += 1.0;
	}
	else
	{
		elapsed_frames += (now - frame_epoch) / frame_frequency;
	}

	frame_epoch = now; // moving epoch
	return elapsed_frames;
}

//
// I_StartupTimer
//
void I_StartupTimer(void)
{
	timer_frequency = SDL_GetPerformanceFrequency();

	I_InitFrameTime(0, R_GetFramerateCap());
	elapsed_frames  = 0.0;
}

void I_Sleep(UINT32 ms)
{
	SDL_Delay(ms);
}

#ifdef NEWSIGNALHANDLER
static void newsignalhandler_Warn(const char *pr)
{
	char text[128];

	snprintf(text, sizeof text,
			"Error while setting up signal reporting: %s: %s",
			pr,
			strerror(errno)
	);

	I_OutputMsg("%s\n", text);

	if (!M_CheckParm("-dedicated"))
		SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR,
			"Startup error",
			text, NULL);

	I_ShutdownConsole();
	exit(-1);
}

static void I_Fork(void)
{
	int child;
	int status;
	int signum;
	int c;

	child = fork();

	switch (child)
	{
		case -1:
			newsignalhandler_Warn("fork()");
			break;
		case 0:
			I_RegisterChildSignals();
			break;
		default:
			if (logstream)
				fclose(logstream);/* the child has this */

			c = wait(&status);

#ifdef LOGMESSAGES
			/* By the way, exit closes files. */
			logstream = fopen(logfilename, "at");
#else
			logstream = 0;
#endif

			if (c == -1)
			{
				kill(child, SIGKILL);
				newsignalhandler_Warn("wait()");
			}
			else
			{
				if (WIFSIGNALED (status))
				{
					signum = WTERMSIG (status);
#ifdef WCOREDUMP
					I_ReportSignal(signum, WCOREDUMP (status));
#else
					I_ReportSignal(signum, 0);
#endif
					status = 128 + signum;
				}
				else if (WIFEXITED (status))
				{
					status = WEXITSTATUS (status);
				}

				I_ShutdownConsole();
				exit(status);
			}
	}
}
#endif/*NEWSIGNALHANDLER*/

INT32 I_StartupSystem(void)
{
	SDL_version SDLcompiled;
	SDL_version SDLlinked;
	SDL_VERSION(&SDLcompiled)
	SDL_GetVersion(&SDLlinked);
#ifdef HAVE_THREADS
	I_start_threads();
	I_AddExitFunc(I_stop_threads);
#endif
	I_StartupConsole();
#ifdef NEWSIGNALHANDLER
	// This is useful when debugging. It lets GDB attach to
	// the correct process easily.
	if (!M_CheckParm("-nofork"))
		I_Fork();
#endif
	I_RegisterSignals();
	I_OutputMsg("Compiled for SDL version: %d.%d.%d\n",
	 SDLcompiled.major, SDLcompiled.minor, SDLcompiled.patch);
	I_OutputMsg("Linked with SDL version: %d.%d.%d\n",
	 SDLlinked.major, SDLlinked.minor, SDLlinked.patch);
	if (SDL_Init(0) < 0)
		I_Error("SRB2: SDL System Error: %s", SDL_GetError()); //Alam: Oh no....
#ifndef NOMUMBLE
	I_SetupMumble();
#endif
	return 0;
}

//
// I_Quit
//
void I_Quit(void)
{
	static SDL_bool quiting = SDL_FALSE;

	/* prevent recursive I_Quit() */
	if (quiting) goto death;
	SDLforceUngrabMouse();
	quiting = SDL_FALSE;
	M_SaveConfig(NULL); //save game config, cvars..
#ifndef NONET
	D_SaveBan(); // save the ban list
#endif
	G_SaveGameData(clientGamedata); // Tails 12-08-2002
	//added:16-02-98: when recording a demo, should exit using 'q' key,
	//        but sometimes we forget and use 'F10'.. so save here too.

	if (demorecording)
		G_CheckDemoStatus();
	if (metalrecording)
		G_StopMetalRecording(false);

	D_QuitNetGame();
	CL_AbortDownloadResume();
	M_FreePlayerSetupColors();
	I_ShutdownMusic();
	I_ShutdownSound();
	// use this for 1.28 19990220 by Kin
	I_ShutdownGraphics();
	I_ShutdownInput();
	I_ShutdownSystem();
	SDL_Quit();
	/* if option -noendtxt is set, don't print the text */
	if (!M_CheckParm("-noendtxt") && W_CheckNumForName("ENDOOM") != LUMPERROR)
	{
		printf("\r");
		ShowEndTxt();
	}
	if (myargmalloc)
		free(myargv); // Deallocate allocated memory
death:
	W_Shutdown();
	exit(0);
}

void I_WaitVBL(INT32 count)
{
	count = 1;
	SDL_Delay(count);
}

void I_BeginRead(void)
{
}

void I_EndRead(void)
{
}

//
// I_Error
//
/**	\brief phuck recursive errors
*/
static INT32 errorcount = 0;

/**	\brief recursive error detecting
*/
static boolean shutdowning = false;

void I_Error(const char *error, ...)
{
	va_list argptr;
	char buffer[8192];

	// recursive error detecting
	if (shutdowning)
	{
		errorcount++;
		if (errorcount == 1)
			SDLforceUngrabMouse();
		// try to shutdown each subsystem separately
		if (errorcount == 2)
			I_ShutdownMusic();
		if (errorcount == 3)
			I_ShutdownSound();
		if (errorcount == 4)
			I_ShutdownGraphics();
		if (errorcount == 5)
			I_ShutdownInput();
		if (errorcount == 6)
			I_ShutdownSystem();
		if (errorcount == 7)
			SDL_Quit();
		if (errorcount == 8)
		{
			M_SaveConfig(NULL);
			G_SaveGameData(clientGamedata);
		}
		if (errorcount > 20)
		{
			va_start(argptr, error);
			vsprintf(buffer, error, argptr);
			va_end(argptr);
			// Implement message box with SDL_ShowSimpleMessageBox,
			// which should fail gracefully if it can't put a message box up
			// on the target system
			if (!M_CheckParm("-dedicated"))
				SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR,
					"SRB2 "VERSIONSTRING" Recursive Error",
					buffer, NULL);

			W_Shutdown();
			exit(-1); // recursive errors detected
		}
	}

	shutdowning = true;

	// Display error message in the console before we start shutting it down
	va_start(argptr, error);
	vsprintf(buffer, error, argptr);
	va_end(argptr);
	I_OutputMsg("\nI_Error(): %s\n", buffer);
	// ---

	M_SaveConfig(NULL); // save game config, cvars..
#ifndef NONET
	D_SaveBan(); // save the ban list
#endif
	G_SaveGameData(clientGamedata); // Tails 12-08-2002

	// Shutdown. Here might be other errors.
	if (demorecording)
		G_CheckDemoStatus();
	if (metalrecording)
		G_StopMetalRecording(false);

	D_QuitNetGame();
	CL_AbortDownloadResume();
	M_FreePlayerSetupColors();
	I_ShutdownMusic();
	I_ShutdownSound();
	// use this for 1.28 19990220 by Kin
	I_ShutdownGraphics();
	I_ShutdownInput();
	I_ShutdownSystem();
	SDL_Quit();

	// Implement message box with SDL_ShowSimpleMessageBox,
	// which should fail gracefully if it can't put a message box up
	// on the target system
	if (!M_CheckParm("-dedicated"))
		SDL_ShowSimpleMessageBox(SDL_MESSAGEBOX_ERROR,
			"SRB2 "VERSIONSTRING" Error",
			buffer, NULL);
	// Note that SDL_ShowSimpleMessageBox does *not* require SDL to be
	// initialized at the time, so calling it after SDL_Quit() is
	// perfectly okay! In addition, we do this on purpose so the
	// fullscreen window is closed before displaying the error message
	// in case the fullscreen window blocks it for some absurd reason.

	W_Shutdown();

#if defined (PARANOIA) && defined (__CYGWIN__)
	*(INT32 *)2 = 4; //Alam: Debug!
#endif

	exit(-1);
}

/**	\brief quit function table
*/
static quitfuncptr quit_funcs[MAX_QUIT_FUNCS]; /* initialized to all bits 0 */

//
//  Adds a function to the list that need to be called by I_SystemShutdown().
//
void I_AddExitFunc(void (*func)())
{
	INT32 c;

	for (c = 0; c < MAX_QUIT_FUNCS; c++)
	{
		if (!quit_funcs[c])
		{
			quit_funcs[c] = func;
			break;
		}
	}
}


//
//  Removes a function from the list that need to be called by
//   I_SystemShutdown().
//
void I_RemoveExitFunc(void (*func)())
{
	INT32 c;

	for (c = 0; c < MAX_QUIT_FUNCS; c++)
	{
		if (quit_funcs[c] == func)
		{
			while (c < MAX_QUIT_FUNCS-1)
			{
				quit_funcs[c] = quit_funcs[c+1];
				c++;
			}
			quit_funcs[MAX_QUIT_FUNCS-1] = NULL;
			break;
		}
	}
}

#if !(defined (__unix__) || defined(__APPLE__) || defined (UNIXCOMMON))
static void Shittycopyerror(const char *name)
{
	I_OutputMsg(
			"Error copying log file: %s: %s\n",
			name,
			strerror(errno)
	);
}

static void Shittylogcopy(void)
{
	char buf[8192];
	FILE *fp;
	size_t r;
	if (fseek(logstream, 0, SEEK_SET) == -1)
	{
		Shittycopyerror("fseek");
	}
	else if (( fp = fopen(logfilename, "wt") ))
	{
		while (( r = fread(buf, 1, sizeof buf, logstream) ))
		{
			if (fwrite(buf, 1, r, fp) < r)
			{
				Shittycopyerror("fwrite");
				break;
			}
		}
		if (ferror(logstream))
		{
			Shittycopyerror("fread");
		}
		fclose(fp);
	}
	else
	{
		Shittycopyerror(logfilename);
	}
}
#endif/*!(defined (__unix__) || defined(__APPLE__) || defined (UNIXCOMMON))*/

//
//  Closes down everything. This includes restoring the initial
//  palette and video mode, and removing whatever mouse, keyboard, and
//  timer routines have been installed.
//
//  NOTE: Shutdown user funcs are effectively called in reverse order.
//
void I_ShutdownSystem(void)
{
	INT32 c;

#ifdef NEWSIGNALHANDLER
	if (M_CheckParm("-nofork"))
#endif
		I_ShutdownConsole();

	for (c = MAX_QUIT_FUNCS-1; c >= 0; c--)
		if (quit_funcs[c])
			(*quit_funcs[c])();
#ifdef LOGMESSAGES
	if (logstream)
	{
		I_OutputMsg("I_ShutdownSystem(): end of logstream.\n");
#if !(defined (__unix__) || defined(__APPLE__) || defined (UNIXCOMMON))
		Shittylogcopy();
#endif
		fclose(logstream);
		logstream = NULL;
	}
#endif

}

void I_GetDiskFreeSpace(INT64 *freespace)
{
#if defined (__unix__) || defined(__APPLE__) || defined (UNIXCOMMON)
#if defined (SOLARIS) || defined (__HAIKU__)
	*freespace = INT32_MAX;
	return;
#else // Both Linux and BSD have this, apparently.
	struct statfs stfs;
	if (statfs(srb2home, &stfs) == -1)
	{
		*freespace = INT32_MAX;
		return;
	}
	*freespace = stfs.f_bavail * stfs.f_bsize;
#endif
#elif defined (_WIN32)
	static p_GetDiskFreeSpaceExA pfnGetDiskFreeSpaceEx = NULL;
	static boolean testwin95 = false;
	ULARGE_INTEGER usedbytes, lfreespace;

	if (!testwin95)
	{
		pfnGetDiskFreeSpaceEx = (p_GetDiskFreeSpaceExA)(LPVOID)GetProcAddress(GetModuleHandleA("kernel32.dll"), "GetDiskFreeSpaceExA");
		testwin95 = true;
	}
	if (pfnGetDiskFreeSpaceEx)
	{
		if (pfnGetDiskFreeSpaceEx(srb2home, &lfreespace, &usedbytes, NULL))
			*freespace = lfreespace.QuadPart;
		else
			*freespace = INT32_MAX;
	}
	else
	{
		DWORD SectorsPerCluster, BytesPerSector, NumberOfFreeClusters, TotalNumberOfClusters;
		GetDiskFreeSpace(NULL, &SectorsPerCluster, &BytesPerSector,
						 &NumberOfFreeClusters, &TotalNumberOfClusters);
		*freespace = BytesPerSector*SectorsPerCluster*NumberOfFreeClusters;
	}
#else // Dummy for platform independent; 1GB should be enough
	*freespace = 1024*1024*1024;
#endif
}

char *I_GetUserName(void)
{
	static char username[MAXPLAYERNAME+1];
	char *p;
#ifdef _WIN32
	DWORD i = MAXPLAYERNAME;

	if (!GetUserNameA(username, &i))
#endif
	{
		p = I_GetEnv("USER");
		if (!p)
		{
			p = I_GetEnv("user");
			if (!p)
			{
				p = I_GetEnv("USERNAME");
				if (!p)
				{
					p = I_GetEnv("username");
					if (!p)
					{
						return NULL;
					}
				}
			}
		}
		strncpy(username, p, MAXPLAYERNAME);
	}


	if (strcmp(username, "") != 0)
		return username;
	return NULL; // dummy for platform independent version
}

INT32 I_mkdir(const char *dirname, INT32 unixright)
{
//[segabor]
#if defined (__unix__) || defined(__APPLE__) || defined (UNIXCOMMON) || defined (__CYGWIN__)
	return mkdir(dirname, unixright);
#elif defined (_WIN32)
	UNREFERENCED_PARAMETER(unixright); /// \todo should implement ntright under nt...
	return CreateDirectoryA(dirname, NULL);
#else
	(void)dirname;
	(void)unixright;
	return false;
#endif
}

char *I_GetEnv(const char *name)
{
#ifdef NEED_SDL_GETENV
	return SDL_getenv(name);
#else
	return getenv(name);
#endif
}

INT32 I_PutEnv(char *variable)
{
#ifdef NEED_SDL_GETENV
	return SDL_putenv(variable);
#else
	return putenv(variable);
#endif
}

size_t I_GetRandomBytes(char *destination, size_t count)
{
#if defined (__unix__) || defined (UNIXCOMMON) || defined(__APPLE__)
	FILE *rndsource;
	size_t actual_bytes;

	if (!(rndsource = fopen("/dev/urandom", "r")))
		if (!(rndsource = fopen("/dev/random", "r")))
			actual_bytes = 0;

	if (rndsource)
	{
		actual_bytes = fread(destination, 1, count, rndsource);
		fclose(rndsource);
	}

	if (actual_bytes == 0)
		I_OutputMsg("I_GetRandomBytes(): couldn't get any random bytes");

	return actual_bytes;
#elif defined (_WIN32)
	if (RtlGenRandom(destination, count))
		return count;

	I_OutputMsg("I_GetRandomBytes(): couldn't get any random bytes");
	return 0;
#else
	#warning SDL I_GetRandomBytes is not implemented on this platform.
	return 0;
#endif
}

INT32 I_ClipboardCopy(const char *data, size_t size)
{
	char storage[256];
	if (size > 255)
		size = 255;
	memcpy(storage, data, size);
	storage[size] = 0;

	if (SDL_SetClipboardText(storage))
		return 0;
	return -1;
}

const char *I_ClipboardPaste(void)
{
	static char clipboard_modified[256];
	char *clipboard_contents, *i = clipboard_modified;

	if (!SDL_HasClipboardText())
		return NULL;

	clipboard_contents = SDL_GetClipboardText();
	strlcpy(clipboard_modified, clipboard_contents, 256);
	SDL_free(clipboard_contents);

	while (*i)
	{
		if (*i == '\n' || *i == '\r')
		{ // End on newline
			*i = 0;
			break;
		}
		else if (*i == '\t')
			*i = ' '; // Tabs become spaces
		else if (*i < 32 || (unsigned)*i > 127)
			*i = '?'; // Nonprintable chars become question marks
		++i;
	}
	return (const char *)&clipboard_modified;
}

/**	\brief	The isWadPathOk function

	\param	path	string path to check

	\return if true, wad file found


*/
static boolean isWadPathOk(const char *path)
{
	char *wad3path = malloc(256);

	if (!wad3path)
		return false;

	sprintf(wad3path, pandf, path, WADKEYWORD1);

	if (FIL_ReadFileOK(wad3path))
	{
		free(wad3path);
		return true;
	}

	free(wad3path);
	return false;
}

static void pathonly(char *s)
{
	size_t j;

	for (j = strlen(s); j != (size_t)-1; j--)
		if ((s[j] == '\\') || (s[j] == ':') || (s[j] == '/'))
		{
			if (s[j] == ':') s[j+1] = 0;
			else s[j] = 0;
			return;
		}
}

/**	\brief	search for srb2.pk3 in the given path

	\param	searchDir	starting path

	\return	WAD path if not NULL


*/
static const char *searchWad(const char *searchDir)
{
	static char tempsw[256] = "";
	filestatus_t fstemp;

	strcpy(tempsw, WADKEYWORD1);
	fstemp = filesearch(tempsw,searchDir,NULL,true,20);
	if (fstemp == FS_FOUND)
	{
		pathonly(tempsw);
		return tempsw;
	}

	return NULL;
}

#define CHECKWADPATH(ret) \
do { \
	I_OutputMsg(",%s", returnWadPath); \
	if (isWadPathOk(returnWadPath)) \
		return ret; \
} while (0)

#define SEARCHWAD(str) \
do { \
	WadPath = searchWad(str); \
	if (WadPath) \
		return WadPath; \
} while (0)

/**	\brief go through all possible paths and look for srb2.pk3

  \return path to srb2.pk3 if any
*/
static const char *locateWad(void)
{
	const char *envstr;
	const char *WadPath;
	int i;

	I_OutputMsg("SRB2WADDIR");
	// does SRB2WADDIR exist?
	if (((envstr = I_GetEnv("SRB2WADDIR")) != NULL) && isWadPathOk(envstr))
		return envstr;

#ifndef NOCWD
	// examine current dir
	strcpy(returnWadPath, ".");
	CHECKWADPATH(NULL);
#endif

#ifdef __APPLE__
	OSX_GetResourcesPath(returnWadPath);
	CHECKWADPATH(returnWadPath);
#endif

	// examine default dirs
	for (i = 0; wadDefaultPaths[i]; i++)
	{
		strcpy(returnWadPath, wadDefaultPaths[i]);
		CHECKWADPATH(returnWadPath);
	}

#ifndef NOHOME
	// find in $HOME
	I_OutputMsg(",HOME");
	if ((envstr = I_GetEnv("HOME")) != NULL)
		SEARCHWAD(envstr);
#endif

	// search paths
	for (i = 0; wadSearchPaths[i]; i++)
	{
		I_OutputMsg(", in:%s", wadSearchPaths[i]);
		SEARCHWAD(wadSearchPaths[i]);
	}

	// if nothing was found
	return NULL;
}

const char *I_LocateWad(void)
{
	const char *waddir;

	I_OutputMsg("Looking for WADs in: ");
	waddir = locateWad();
	I_OutputMsg("\n");

	if (waddir)
	{
		// change to the directory where we found srb2.pk3
#if defined (_WIN32)
		SetCurrentDirectoryA(waddir);
#else
		if (chdir(waddir) == -1)
			I_OutputMsg("Couldn't change working directory\n");
#endif
	}
	return waddir;
}

#ifdef __linux__
#define MEMINFO_FILE "/proc/meminfo"
#define MEMTOTAL "MemTotal:"
#define MEMAVAILABLE "MemAvailable:"
#define MEMFREE "MemFree:"
#define CACHED "Cached:"
#define BUFFERS "Buffers:"
#define SHMEM "Shmem:"

/* Parse the contents of /proc/meminfo (in buf), return value of "name"
 * (example: MemTotal) */
static long get_entry(const char* name, const char* buf)
{
	long val;
	char* hit = strstr(buf, name);
	if (hit == NULL) {
		return -1;
	}

	errno = 0;
	val = strtol(hit + strlen(name), NULL, 10);
	if (errno != 0) {
		CONS_Alert(CONS_ERROR, M_GetText("get_entry: strtol() failed: %s\n"), strerror(errno));
		return -1;
	}
	return val;
}
#endif

size_t I_GetFreeMem(size_t *total)
{
#ifdef FREEBSD
	struct vmmeter sum;
	kvm_t *kd;
	struct nlist namelist[] =
	{
#define X_SUM   0
		{"_cnt"},
		{NULL}
	};
	if ((kd = kvm_open(NULL, NULL, NULL, O_RDONLY, "kvm_open")) == NULL)
	{
		if (total)
			*total = 0L;
		return 0;
	}
	if (kvm_nlist(kd, namelist) != 0)
	{
		kvm_close (kd);
		if (total)
			*total = 0L;
		return 0;
	}
	if (kvm_read(kd, namelist[X_SUM].n_value, &sum,
		sizeof (sum)) != sizeof (sum))
	{
		kvm_close(kd);
		if (total)
			*total = 0L;
		return 0;
	}
	kvm_close(kd);

	if (total)
		*total = sum.v_page_count * sum.v_page_size;
	return sum.v_free_count * sum.v_page_size;
#elif defined (SOLARIS)
	/* Just guess */
	if (total)
		*total = 32 << 20;
	return 32 << 20;
#elif defined (_WIN32)
	MEMORYSTATUS info;

	info.dwLength = sizeof (MEMORYSTATUS);
	GlobalMemoryStatus( &info );
	if (total)
		*total = (size_t)info.dwTotalPhys;
	return (size_t)info.dwAvailPhys;
#elif defined (__linux__)
	/* Linux */
	char buf[1024];
	char *memTag;
	size_t freeKBytes;
	size_t totalKBytes;
	INT32 n;
	INT32 meminfo_fd = -1;
	long Cached;
	long MemFree;
	long Buffers;
	long Shmem;
	long MemAvailable = -1;

	meminfo_fd = open(MEMINFO_FILE, O_RDONLY);
	n = read(meminfo_fd, buf, 1023);
	close(meminfo_fd);

	if (n < 0)
	{
		// Error
		if (total)
			*total = 0L;
		return 0;
	}

	buf[n] = '\0';
	if ((memTag = strstr(buf, MEMTOTAL)) == NULL)
	{
		// Error
		if (total)
			*total = 0L;
		return 0;
	}

	memTag += sizeof (MEMTOTAL);
	totalKBytes = (size_t)atoi(memTag);

	if ((memTag = strstr(buf, MEMAVAILABLE)) == NULL)
	{
		Cached = get_entry(CACHED, buf);
		MemFree = get_entry(MEMFREE, buf);
		Buffers = get_entry(BUFFERS, buf);
		Shmem = get_entry(SHMEM, buf);
		MemAvailable = Cached + MemFree + Buffers - Shmem;

		if (MemAvailable == -1)
		{
			// Error
			if (total)
				*total = 0L;
			return 0;
		}
		freeKBytes = MemAvailable;
	}
	else
	{
		memTag += sizeof (MEMAVAILABLE);
		freeKBytes = atoi(memTag);
	}

	if (total)
		*total = totalKBytes << 10;
	return freeKBytes << 10;
#else
	// Guess 48 MB.
	if (total)
		*total = 48<<20;
	return 48<<20;
#endif
}

const CPUInfoFlags *I_CPUInfo(void)
{
#if defined (_WIN32)
	static CPUInfoFlags WIN_CPUInfo;
	SYSTEM_INFO SI;
	p_IsProcessorFeaturePresent pfnCPUID = (p_IsProcessorFeaturePresent)(LPVOID)GetProcAddress(GetModuleHandleA("kernel32.dll"), "IsProcessorFeaturePresent");

	ZeroMemory(&WIN_CPUInfo,sizeof (WIN_CPUInfo));
	if (pfnCPUID)
	{
		WIN_CPUInfo.FPPE       = pfnCPUID( 0); //PF_FLOATING_POINT_PRECISION_ERRATA
		WIN_CPUInfo.FPE        = pfnCPUID( 1); //PF_FLOATING_POINT_EMULATED
		WIN_CPUInfo.cmpxchg    = pfnCPUID( 2); //PF_COMPARE_EXCHANGE_DOUBLE
		WIN_CPUInfo.MMX        = pfnCPUID( 3); //PF_MMX_INSTRUCTIONS_AVAILABLE
		WIN_CPUInfo.PPCMM64    = pfnCPUID( 4); //PF_PPC_MOVEMEM_64BIT_OK
		WIN_CPUInfo.ALPHAbyte  = pfnCPUID( 5); //PF_ALPHA_BYTE_INSTRUCTIONS
		WIN_CPUInfo.SSE        = pfnCPUID( 6); //PF_XMMI_INSTRUCTIONS_AVAILABLE
		WIN_CPUInfo.AMD3DNow   = pfnCPUID( 7); //PF_3DNOW_INSTRUCTIONS_AVAILABLE
		WIN_CPUInfo.RDTSC      = pfnCPUID( 8); //PF_RDTSC_INSTRUCTION_AVAILABLE
		WIN_CPUInfo.PAE        = pfnCPUID( 9); //PF_PAE_ENABLED
		WIN_CPUInfo.SSE2       = pfnCPUID(10); //PF_XMMI64_INSTRUCTIONS_AVAILABLE
		//WIN_CPUInfo.blank    = pfnCPUID(11); //PF_SSE_DAZ_MODE_AVAILABLE
		WIN_CPUInfo.DEP        = pfnCPUID(12); //PF_NX_ENABLED
		WIN_CPUInfo.SSE3       = pfnCPUID(13); //PF_SSE3_INSTRUCTIONS_AVAILABLE
		WIN_CPUInfo.cmpxchg16b = pfnCPUID(14); //PF_COMPARE_EXCHANGE128
		WIN_CPUInfo.cmp8xchg16 = pfnCPUID(15); //PF_COMPARE64_EXCHANGE128
		WIN_CPUInfo.PFC        = pfnCPUID(16); //PF_CHANNELS_ENABLED
	}
#ifdef HAVE_SDLCPUINFO
	else
	{
		WIN_CPUInfo.RDTSC       = SDL_HasRDTSC();
		WIN_CPUInfo.MMX         = SDL_HasMMX();
		WIN_CPUInfo.AMD3DNow    = SDL_Has3DNow();
		WIN_CPUInfo.SSE         = SDL_HasSSE();
		WIN_CPUInfo.SSE2        = SDL_HasSSE2();
		WIN_CPUInfo.AltiVec     = SDL_HasAltiVec();
	}
	WIN_CPUInfo.MMXExt      = SDL_FALSE; //SDL_HasMMXExt(); No longer in SDL2
	WIN_CPUInfo.AMD3DNowExt = SDL_FALSE; //SDL_Has3DNowExt(); No longer in SDL2
#endif
	GetSystemInfo(&SI);
	WIN_CPUInfo.CPUs = SI.dwNumberOfProcessors;
	WIN_CPUInfo.IA64 = (SI.dwProcessorType == 2200); // PROCESSOR_INTEL_IA64
	WIN_CPUInfo.AMD64 = (SI.dwProcessorType == 8664); // PROCESSOR_AMD_X8664
	return &WIN_CPUInfo;
#elif defined (HAVE_SDLCPUINFO)
	static CPUInfoFlags SDL_CPUInfo;
	memset(&SDL_CPUInfo,0,sizeof (CPUInfoFlags));
	SDL_CPUInfo.RDTSC       = SDL_HasRDTSC();
	SDL_CPUInfo.MMX         = SDL_HasMMX();
	SDL_CPUInfo.MMXExt      = SDL_FALSE; //SDL_HasMMXExt(); No longer in SDL2
	SDL_CPUInfo.AMD3DNow    = SDL_Has3DNow();
	SDL_CPUInfo.AMD3DNowExt = SDL_FALSE; //SDL_Has3DNowExt(); No longer in SDL2
	SDL_CPUInfo.SSE         = SDL_HasSSE();
	SDL_CPUInfo.SSE2        = SDL_HasSSE2();
	SDL_CPUInfo.AltiVec     = SDL_HasAltiVec();
	return &SDL_CPUInfo;
#else
	return NULL; /// \todo CPUID asm
#endif
}

// note CPUAFFINITY code used to reside here
void I_RegisterSysCommands(void) {}
#endif