quakeforge/nq/source/keys.c

/*
	keys.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

	$Id$
*/

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef _WIN32
# include <windows.h>
#endif
#ifdef HAVE_STRING_H
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif

#include <stdlib.h>
#include <ctype.h>

#include "client.h"
#include "QF/cmd.h"
#include "QF/console.h"
#include "QF/cvar.h"
#include "QF/keys.h"
#include "screen.h"
#include "QF/sys.h"

/*

key up events are sent even if in console mode

*/

cvar_t     *cl_chatmode;

#define		MAXCMDLINE	256
char        key_lines[32][MAXCMDLINE];
int         key_linepos;
int         key_lastpress;

int         edit_line = 0;
int         history_line = 0;

keydest_t   key_dest;

char       *keybindings[256];
qboolean    consolekeys[256];			// if true, can't be rebound while in 
										// console
qboolean    menubound[256];				// if true, can't be rebound while in 
										// menu
int         keyshift[256];				// key to map to if shift held down
										// in console
int         key_repeats[256];			// if > 1, it is autorepeating
qboolean    keydown[256];

typedef struct {
	char       *name;
	int         keynum;
} keyname_t;

keyname_t   keynames[] = {
	{"TAB", K_TAB},
	{"ENTER", K_ENTER},
	{"ESCAPE", K_ESCAPE},
	{"SPACE", K_SPACE},
	{"BACKSPACE", K_BACKSPACE},

	{"CAPSLOCK", K_CAPSLOCK},
	{"PRINTSCR", K_PRNTSCR},
	{"SCRLCK", K_SCRLCK},
	{"PAUSE", K_PAUSE},

	{"UPARROW", K_UPARROW},
	{"DOWNARROW", K_DOWNARROW},
	{"LEFTARROW", K_LEFTARROW},
	{"RIGHTARROW", K_RIGHTARROW},

	{"ALT", K_ALT},
	{"CTRL", K_CTRL},
	{"SHIFT", K_SHIFT},

	// Keypad stuff..

	// These are duplicated
	{"NUMLOCK", KP_NUMLCK},
	{"KP_NUMLCK", KP_NUMLCK},
	{"KP_NUMLOCK", KP_NUMLCK},
	{"KP_SLASH", KP_DIVIDE},
	{"KP_DIVIDE", KP_DIVIDE},
	{"KP_STAR", KP_MULTIPLY},
	{"KP_MULTIPLY", KP_MULTIPLY},
	{"KP_MINUS", KP_MINUS},

	{"KP_HOME", KP_HOME},
	{"KP_UPARROW", KP_UPARROW},
	{"KP_PGUP", KP_PGUP},
	{"KP_PLUS", KP_PLUS},

	{"KP_LEFTARROW", KP_LEFTARROW},
	{"KP_5", KP_5},
	{"KP_RIGHTARROW", KP_RIGHTARROW},

	{"KP_END", KP_END},
	{"KP_DOWNARROW", KP_DOWNARROW},
	{"KP_PGDN", KP_PGDN},

	{"KP_INS", KP_INS},
	{"KP_DEL", KP_DEL},
	{"KP_ENTER", KP_ENTER},


	{"F1", K_F1},
	{"F2", K_F2},
	{"F3", K_F3},
	{"F4", K_F4},
	{"F5", K_F5},
	{"F6", K_F6},
	{"F7", K_F7},
	{"F8", K_F8},
	{"F9", K_F9},
	{"F10", K_F10},
	{"F11", K_F11},
	{"F12", K_F12},

	{"INS", K_INS},
	{"DEL", K_DEL},
	{"PGDN", K_PGDN},
	{"PGUP", K_PGUP},
	{"HOME", K_HOME},
	{"END", K_END},

	{"MOUSE1", K_MOUSE1},
	{"MOUSE2", K_MOUSE2},
	{"MOUSE3", K_MOUSE3},

	{"JOY1", K_JOY1},
	{"JOY2", K_JOY2},
	{"JOY3", K_JOY3},
	{"JOY4", K_JOY4},

	{"AUX1", K_AUX1},
	{"AUX2", K_AUX2},
	{"AUX3", K_AUX3},
	{"AUX4", K_AUX4},
	{"AUX5", K_AUX5},
	{"AUX6", K_AUX6},
	{"AUX7", K_AUX7},
	{"AUX8", K_AUX8},
	{"AUX9", K_AUX9},
	{"AUX10", K_AUX10},
	{"AUX11", K_AUX11},
	{"AUX12", K_AUX12},
	{"AUX13", K_AUX13},
	{"AUX14", K_AUX14},
	{"AUX15", K_AUX15},
	{"AUX16", K_AUX16},
	{"AUX17", K_AUX17},
	{"AUX18", K_AUX18},
	{"AUX19", K_AUX19},
	{"AUX20", K_AUX20},
	{"AUX21", K_AUX21},
	{"AUX22", K_AUX22},
	{"AUX23", K_AUX23},
	{"AUX24", K_AUX24},
	{"AUX25", K_AUX25},
	{"AUX26", K_AUX26},
	{"AUX27", K_AUX27},
	{"AUX28", K_AUX28},
	{"AUX29", K_AUX29},
	{"AUX30", K_AUX30},
	{"AUX31", K_AUX31},
	{"AUX32", K_AUX32},

	{"MWHEELUP", K_MWHEELUP},
	{"MWHEELDOWN", K_MWHEELDOWN},

	{"SEMICOLON", ';'},					// because a raw semicolon seperates
	// commands

	{NULL, 0}
};

/*
			LINE TYPING INTO THE CONSOLE
*/

qboolean
CheckForCommand (void)
{
	char        command[128];
	char       *cmd, *s;
	int         i;

	s = key_lines[edit_line] + 1;

	for (i = 0; i < 127; i++)
		if (s[i] <= ' ')
			break;
		else
			command[i] = s[i];
	command[i] = 0;

	cmd = Cmd_CompleteCommand (command);
	if (!cmd || strcmp (cmd, command))
		cmd = Cvar_CompleteVariable (command);
	if (!cmd || strcmp (cmd, command))
		return false;					// just a chat message
	return true;
}

void
CompleteCommand (void)
{
	char       *cmd, *s;

	s = key_lines[edit_line] + 1;
	if (*s == '\\' || *s == '/')
		s++;

	cmd = Cmd_CompleteCommand (s);
	if (!cmd)
		cmd = Cvar_CompleteVariable (s);
	if (cmd) {
		key_lines[edit_line][1] = '/';
		strcpy (key_lines[edit_line] + 2, cmd);
		key_linepos = strlen (cmd) + 2;
		key_lines[edit_line][key_linepos] = ' ';
		key_linepos++;
		key_lines[edit_line][key_linepos] = 0;
		return;
	}
}

/*
	Key_Console

	Interactive line editing and console scrollback
*/
void
Key_Console (int key)
{
	int         i;

#ifdef _WIN32
	HANDLE      th;
	char       *clipText, *textCopied;
#endif

	switch (key) {
		case K_ENTER:
			// backslash text are commands
			if (key_lines[edit_line][1] == '/'
				&& key_lines[edit_line][2] == '/')
				goto no_lf;
			else if (key_lines[edit_line][1] == '\\'
					 || key_lines[edit_line][1] == '/')
				Cbuf_AddText (key_lines[edit_line] + 2);	// skip the ]/
			else if (cl_chatmode->int_val != 1 && CheckForCommand ())
				Cbuf_AddText (key_lines[edit_line] + 1);	// valid command
			else if ((cls.state >= ca_connected && cl_chatmode->int_val == 2)
					 || cl_chatmode->int_val == 1) {
				if (cls.state < ca_connected)	// can happen if cl_chatmode
					// is 1
					goto no_lf;			// the text goes to /dev/null :)

				// convert to a chat message
				Cbuf_AddText ("say ");
				Cbuf_AddText (key_lines[edit_line] + 1);
			} else
				Cbuf_AddText (key_lines[edit_line] + 1);	// skip the ]

			Cbuf_AddText ("\n");
		  no_lf:
			Con_Printf ("%s\n", key_lines[edit_line]);
			edit_line = (edit_line + 1) & 31;
			history_line = edit_line;
			key_lines[edit_line][0] = ']';
			key_lines[edit_line][1] = 0;
			key_linepos = 1;
			if (cls.state == ca_disconnected)
				SCR_UpdateScreen ();	// force an update, because the
			// command
			// may take some time
			return;

		case K_TAB:
			// command completion
			CompleteCommand ();
			return;

		case K_BACKSPACE:
			if (key_linepos > 1) {
				strcpy (key_lines[edit_line] + key_linepos - 1,
						key_lines[edit_line] + key_linepos);
				key_linepos--;
			}
			return;

		case K_DEL:
			if (key_linepos < strlen (key_lines[edit_line]))
				strcpy (key_lines[edit_line] + key_linepos,
						key_lines[edit_line] + key_linepos + 1);
			return;

		case K_RIGHTARROW:
			if (key_linepos < strlen (key_lines[edit_line]))
				key_linepos++;
			return;

		case K_LEFTARROW:
			if (key_linepos > 1)
				key_linepos--;
			return;

		case K_UPARROW:
			do {
				history_line = (history_line - 1) & 31;
			} while (history_line != edit_line && !key_lines[history_line][1]);
			if (history_line == edit_line)
				history_line = (edit_line + 1) & 31;
			strcpy (key_lines[edit_line], key_lines[history_line]);
			key_linepos = strlen (key_lines[edit_line]);
			return;

		case K_DOWNARROW:
			if (history_line == edit_line)
				return;
			do {
				history_line = (history_line + 1) & 31;
			} while (history_line != edit_line && !key_lines[history_line][1]);

			if (history_line == edit_line) {
				key_lines[edit_line][0] = ']';
				key_lines[edit_line][1] = 0;
				key_linepos = 1;
			} else {
				strcpy (key_lines[edit_line], key_lines[history_line]);
				key_linepos = strlen (key_lines[edit_line]);
			}
			return;

		case K_MWHEELUP:
		case K_PGUP:
			if (con->display - con->current + con->numlines > 2)
				con->display -= 2;
			return;

		case K_MWHEELDOWN:
		case K_PGDN:
			con->display += 2;
			if (con->display > con->current)
				con->display = con->current;
			return;

		case K_HOME:
			if (keydown[K_CTRL]) {
				if (con->numlines > 10)
					con->display = con->current - con->numlines + 10;
			} else
				key_linepos = 1;
			return;

		case K_END:
			if (keydown[K_CTRL])
				con->display = con->current;
			else
				key_linepos = strlen (key_lines[edit_line]);
			return;
	}
#ifdef _WIN32
	if ((key == 'V' || key == 'v') && GetKeyState (VK_CONTROL) < 0) {
		if (OpenClipboard (NULL)) {
			th = GetClipboardData (CF_TEXT);
			if (th) {
				clipText = GlobalLock (th);
				if (clipText) {
					textCopied = malloc (GlobalSize (th) + 1);
					strcpy (textCopied, clipText);
					/* Substitutes a NULL for every token */
					strtok (textCopied, "\n\r\b");
					i = strlen (textCopied);
					if (i + strlen (key_lines[edit_line]) > MAXCMDLINE - 1)
						i = MAXCMDLINE - 1 - strlen (key_lines[edit_line]);
					if (i > 0) {		// insert the string
						memmove (key_lines[edit_line] + key_linepos + i,
								 key_lines[edit_line] + key_linepos,
								 strlen (key_lines[edit_line]) - key_linepos +
								 1);
						memcpy (key_lines[edit_line] + key_linepos, textCopied,
								i);
						key_linepos += i;
					}
					free (textCopied);
				}
				GlobalUnlock (th);
			}
			CloseClipboard ();
			return;
		}
	}
#endif

	if (key < 32 || key > 127)
		return;							// non printable

	i = strlen (key_lines[edit_line]);
	if (i >= MAXCMDLINE - 1)
		return;

	// This also moves the ending \0
	memmove (key_lines[edit_line] + key_linepos + 1,
			 key_lines[edit_line] + key_linepos, i - key_linepos + 1);
	key_lines[edit_line][key_linepos] = key;
	key_linepos++;
}

//============================================================================

qboolean    chat_team;
char        chat_buffer[MAXCMDLINE];
int         chat_bufferlen = 0;

void
Key_Message (int key)
{

	if (key == K_ENTER) {
		if (chat_team)
			Cbuf_AddText ("say_team \"");
		else
			Cbuf_AddText ("say \"");
		Cbuf_AddText (chat_buffer);
		Cbuf_AddText ("\"\n");

		key_dest = key_game;
		chat_bufferlen = 0;
		chat_buffer[0] = 0;
		return;
	}

	if (key == K_ESCAPE) {
		key_dest = key_game;
		chat_bufferlen = 0;
		chat_buffer[0] = 0;
		return;
	}

	if (key < 32 || key > 127)
		return;							// non printable

	if (key == K_BACKSPACE) {
		if (chat_bufferlen) {
			chat_bufferlen--;
			chat_buffer[chat_bufferlen] = 0;
		}
		return;
	}

	if (chat_bufferlen == sizeof (chat_buffer) - 1)
		return;							// all full

	chat_buffer[chat_bufferlen++] = key;
	chat_buffer[chat_bufferlen] = 0;
}

//============================================================================


/*
	Key_StringToKeynum

	Returns a key number to be used to index keybindings[] by looking at
	the given string.  Single ascii characters return themselves, while
	the K_* names are matched up.
*/
int
Key_StringToKeynum (char *str)
{
	keyname_t  *kn;

	if (!str || !str[0])
		return -1;
	if (!str[1])
		return str[0];

	for (kn = keynames; kn->name; kn++) {
		if (!strcasecmp (str, kn->name))
			return kn->keynum;
	}
	return -1;
}

/*
	Key_KeynumToString

	Returns a string (either a single ascii char, or a K_* name) for the
	given keynum.
	FIXME: handle quote special (general escape sequence?)
*/
char       *
Key_KeynumToString (int keynum)
{
	keyname_t  *kn;
	static char tinystr[2];

	if (keynum == -1)
		return "<KEY NOT FOUND>";
	if (keynum > 32 && keynum < 127) {	// printable ascii
		tinystr[0] = keynum;
		tinystr[1] = 0;
		return tinystr;
	}

	for (kn = keynames; kn->name; kn++)
		if (keynum == kn->keynum)
			return kn->name;

	return "<UNKNOWN KEYNUM>";
}


/*
	Key_SetBinding
*/
void
Key_SetBinding (int keynum, char *binding)
{
	char       *new;
	int         l;

	if (keynum == -1)
		return;

// free old bindings
	if (keybindings[keynum]) {
		free (keybindings[keynum]);
		keybindings[keynum] = NULL;
	}
// allocate memory for new binding
	l = strlen (binding);
	new = malloc (l + 1);
	strcpy (new, binding);
	new[l] = 0;
	keybindings[keynum] = new;
}

/*
	Key_Unbind_f
*/
void
Key_Unbind_f (void)
{
	int         b;

	if (Cmd_Argc () != 2) {
		Con_Printf ("unbind <key> : remove commands from a key\n");
		return;
	}

	b = Key_StringToKeynum (Cmd_Argv (1));
	if (b == -1) {
		Con_Printf ("\"%s\" isn't a valid key\n", Cmd_Argv (1));
		return;
	}

	Key_SetBinding (b, "");
}

void
Key_Unbindall_f (void)
{
	int         i;

	for (i = 0; i < 256; i++)
		if (keybindings[i])
			Key_SetBinding (i, "");
}


/*
	Key_Bind_f
*/
void
Key_Bind_f (void)
{
	int         i, c, b;
	char        cmd[1024];

	c = Cmd_Argc ();

	if (c < 2) {
		Con_Printf ("bind <key> [command] : attach a command to a key\n");
		return;
	}
	b = Key_StringToKeynum (Cmd_Argv (1));
	if (b == -1) {
		Con_Printf ("\"%s\" isn't a valid key\n", Cmd_Argv (1));
		return;
	}

	if (c == 2) {
		if (keybindings[b])
			Con_Printf ("\"%s\" = \"%s\"\n", Cmd_Argv (1), keybindings[b]);
		else
			Con_Printf ("\"%s\" is not bound\n", Cmd_Argv (1));
		return;
	}
// copy the rest of the command line
	cmd[0] = 0;							// start out with a null string
	for (i = 2; i < c; i++) {
		strncat (cmd, Cmd_Argv (i), sizeof (cmd) - strlen (cmd));
		if (i != (c - 1))
			strncat (cmd, " ", sizeof (cmd) - strlen (cmd));
	}

	Key_SetBinding (b, cmd);
}

/*
	Key_WriteBindings

	Writes lines containing "bind key value"
*/
void
Key_WriteBindings (QFile *f)
{
	int         i;

	for (i = 0; i < 256; i++)
		if (keybindings[i])
			Qprintf (f, "bind \"%s\" \"%s\"\n", Key_KeynumToString (i),
					keybindings[i]);
			// 1999-12-26 bound keys not saved in quotes fix by Maddes
}


/*
	Key_Init
*/
void
Key_Init (void)
{
	int         i;

	for (i = 0; i < 32; i++) {
		key_lines[i][0] = ']';
		key_lines[i][1] = 0;
	}
	key_linepos = 1;

//
// init ascii characters in console mode
//
	for (i = 32; i < 128; i++)
		consolekeys[i] = true;
	consolekeys[K_ENTER] = true;
	consolekeys[K_TAB] = true;
	consolekeys[K_LEFTARROW] = true;
	consolekeys[K_RIGHTARROW] = true;
	consolekeys[K_UPARROW] = true;
	consolekeys[K_DOWNARROW] = true;
	consolekeys[K_BACKSPACE] = true;
	consolekeys[K_DEL] = true;
	consolekeys[K_HOME] = true;
	consolekeys[K_END] = true;
	consolekeys[K_PGUP] = true;
	consolekeys[K_PGDN] = true;
	consolekeys[K_SHIFT] = true;
	consolekeys[K_MWHEELUP] = true;
	consolekeys[K_MWHEELDOWN] = true;
	consolekeys['`'] = false;
	consolekeys['~'] = false;

	for (i = 0; i < 256; i++)
		keyshift[i] = i;
	for (i = 'a'; i <= 'z'; i++)
		keyshift[i] = i - 'a' + 'A';
	keyshift['1'] = '!';
	keyshift['2'] = '@';
	keyshift['3'] = '#';
	keyshift['4'] = '$';
	keyshift['5'] = '%';
	keyshift['6'] = '^';
	keyshift['7'] = '&';
	keyshift['8'] = '*';
	keyshift['9'] = '(';
	keyshift['0'] = ')';
	keyshift['-'] = '_';
	keyshift['='] = '+';
	keyshift[','] = '<';
	keyshift['.'] = '>';
	keyshift['/'] = '?';
	keyshift[';'] = ':';
	keyshift['\''] = '"';
	keyshift['['] = '{';
	keyshift[']'] = '}';
	keyshift['`'] = '~';
	keyshift['\\'] = '|';

	menubound[K_ESCAPE] = true;
	for (i = 0; i < 12; i++)
		menubound[K_F1 + i] = true;

//
// register our functions
//
	Cmd_AddCommand ("bind", Key_Bind_f,
					"Assign a command or a set of commands to a key.\n"
					"Note: To bind multiple commands to a key, enclose the commands in quotes and separate with semi-colons. \n"
					"To bind to non-printable keys, use the key name.\n"
					"Key Name List: Escape, F1-F12, pause, backspace, tab, semicolon, enter, shift, ctrl, alt, space, ins,\n"
					"home, pgup, del, end, pgdn, uparrow, downarrow, leftarrow, rightarrow, mouse1-mouse3, aux1-aux9, joy1-joy4,\n"
					"mwheelup, mwheeldown\n"
					"Special: The escape, and ~ (tilde) keys can only be bound from an external configuration file.");

	Cmd_AddCommand ("unbind", Key_Unbind_f,
					"Remove the bind from the the selected key");
	Cmd_AddCommand ("unbindall", Key_Unbindall_f,
					"Remove all binds (USE CAUTIOUSLY!!!)");
}

void
Key_Init_Cvars (void)
{
	cl_chatmode = Cvar_Get ("cl_chatmode", "2", CVAR_NONE, 0,
							"Controls when console text will be treated as a chat message: 0 - never, 1 - always, 2 - smart");
}

/*
	Key_Event

	Called by the system between frames for both key up and key down events
	Should NOT be called during an interrupt!
*/
void
Key_Event (int key, int alt_key, qboolean down)
{
	char       *kb;
	char        cmd[1024];

//  Con_Printf ("%i : %i\n", key, down);    //@@@

	// They don't prove it, fall back to interal MESS.
	if (alt_key == -1) {
		if (keydown[K_SHIFT]) {
			alt_key = keyshift[key];
		}
	}

	keydown[key] = down;

	if (!down)
		key_repeats[key] = 0;

	key_lastpress = key;

// update auto-repeat status
	if (down) {
		key_repeats[key]++;
		if (key_repeats[key] > 1) {
			if ((key != K_BACKSPACE && key != K_DEL
				 && key != K_LEFTARROW && key != K_RIGHTARROW
				 && key != K_PGUP && key != K_PGDN)
				|| (key_dest == key_game && cls.state == ca_active))
				return;					// ignore most autorepeats
		}

		if (key >= 200 && !keybindings[key])
			Con_Printf ("%s is unbound, hit F4 to set.\n",
						Key_KeynumToString (key));
	}
// Exit message mode is disconnected
	if (key_dest == key_message && cls.state != ca_active)
		key_dest = key_console;

//
// handle escape specialy, so the user can never unbind it
//
	if (key == K_ESCAPE) {
		if (!down)
			return;
		switch (key_dest) {
			case key_message:
				Key_Message (key);
				break;
			case key_menu:
//				M_Keydown (key);
				break;
			case key_game:
			case key_console:
//				M_ToggleMenu_f ();
				Con_ToggleConsole_f ();
				break;
			default:
				Sys_Error ("Bad key_dest");
		}
		return;
	}
//
// key up events only generate commands if the game key binding is
// a button command (leading + sign).  These will occur even in console mode,
// to keep the character from continuing an action started before a console
// switch.  Button commands include the kenum as a parameter, so multiple
// downs can be matched with ups
//
	if (!down) {
		kb = keybindings[key];
		if (kb && kb[0] == '+') {
			snprintf (cmd, sizeof (cmd), "-%s %i\n", kb + 1, key);
			Cbuf_AddText (cmd);
		}
		if (islower (key)) {
			kb = keybindings[toupper (key)];
			if (kb && kb[0] == '+') {
				snprintf (cmd, sizeof (cmd), "-%s %i\n", kb + 1, key);
				Cbuf_AddText (cmd);
			}
		}
		return;
	}
//
// during demo playback, most keys bring up the main menu
//
	if (cls.demoplayback && down && consolekeys[key] && key_dest == key_game
		&& key != K_CTRL && key != K_DEL && key != K_HOME && key != K_END
		&& key != K_TAB) {
//		M_ToggleMenu_f ();
		Con_ToggleConsole_f ();
		return;
	}
//
// if not a consolekey, send to the interpreter no matter what mode is
//
	if ((key_dest == key_menu && menubound[key])
		|| (key_dest == key_console && !consolekeys[key])
		|| (key_dest == key_game
			&& (cls.state == ca_active || !consolekeys[key]))) {
		kb = keybindings[key];
		if (kb) {
			if (kb[0] == '+') {			// button commands add keynum as a
				// parm
				snprintf (cmd, sizeof (cmd), "%s %i\n", kb, key);
				Cbuf_AddText (cmd);
			} else {
				Cbuf_AddText (kb);
				Cbuf_AddText ("\n");
			}
		}
		return;
	}


	if (!down)
		return;							// other systems only care about key
	// down events

	if (alt_key > 0)
		key = alt_key;

	switch (key_dest) {
		case key_message:
			Key_Message (key);
			break;
		case key_menu:
//			M_Keydown (key);
			break;

		case key_game:
		case key_console:
			Key_Console (key);
			break;
		default:
			Sys_Error ("Bad key_dest");
	}
}

/*
	Key_ClearStates
*/
void
Key_ClearStates (void)
{
	int         i;

	for (i = 0; i < 256; i++) {
		keydown[i] = false;
		key_repeats[i] = false;
	}
}