view src/video/caca/SDL_cacaevents.c @ 4355:9b464226e541 SDL-1.2

Fixed bug #855 Ludwig Nussel 2009-10-18 06:31:52 PDT an mprotect call was added to fix bug 528. However that results in a buffer that allows writing and code execution. Ie the no-execute security features of modern operating systems are defeated this way. Two mprotect calls are needed. One to make the buffer executable but not writeable when done and another one to make the buffer writeable again if the content needs to be changed.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 18 Oct 2009 17:31:37 +0000
parents d1c0ac95d023
children
line wrap: on
line source

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga

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

    This library 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
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the Free
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    Sam Lantinga
    slouken@libsdl.org
*/

#ifdef SAVE_RCSID
static char rcsid =
 "@(#) $Id: libsdl-1.2.11-libcaca.patch,v 1.1 2006/09/18 16:06:06 mr_bones_ Exp $";
#endif

#include <stdio.h>

#include <caca.h>
#ifdef CACA_API_VERSION_1
#include <caca0.h>
#endif

#include "SDL.h"
#include "../../events/SDL_sysevents.h"
#include "../../events/SDL_events_c.h"
#include "SDL_cacavideo.h"
#include "SDL_cacaevents_c.h"

void Caca_PumpEvents(_THIS)
{
	int posted = 0;
	int event;
	SDL_keysym keysym;

	if( ! this->screen ) /* Wait till we got the screen initialised */
	  return;

	do {
		posted = 0;

		/* Get libcaca event */
		SDL_mutexP(Caca_mutex);
		event = caca_get_event(CACA_EVENT_ANY);
		SDL_mutexV(Caca_mutex);

		if ( event & (CACA_EVENT_KEY_PRESS | CACA_EVENT_KEY_RELEASE)) {
			int key;
			switch ( event & 0xffffff )
			{
				case CACA_KEY_LEFT: key = SDLK_LEFT; break;
				case CACA_KEY_RIGHT: key = SDLK_RIGHT; break;
				case CACA_KEY_UP: key = SDLK_UP; break;
				case CACA_KEY_DOWN: key = SDLK_DOWN; break;
				default: key = event & 0xff; break;
			}
			/* Key pressed */
/*    		printf("Key pressed: %d (%c)\n", key, key); */
			keysym.scancode = key;
			keysym.sym = key;
			keysym.mod = KMOD_NONE;
			keysym.unicode = 0;
			if ( SDL_TranslateUNICODE ) {
				keysym.unicode = key;
			}
			posted += SDL_PrivateKeyboard((event & CACA_EVENT_KEY_PRESS) ? SDL_PRESSED : SDL_RELEASED, &keysym);
		}
		else if ( event & (CACA_EVENT_MOUSE_PRESS | CACA_EVENT_MOUSE_RELEASE) ) {
			/* FIXME: we currently ignore the button type! */
			int button = event & 0x00ffffff;
			if ( button > 3 ) {
				button = 1;
			}
			posted += SDL_PrivateMouseButton((event & CACA_EVENT_MOUSE_PRESS) ? SDL_PRESSED : SDL_RELEASED, button, 0, 0);
		}
		else if ( event & CACA_EVENT_MOUSE_MOTION ) {
			int new_x = 0, new_y = 0;
			new_x = ((event & 0x00fff000) >> 12) * Caca_w / caca_get_width();
			new_y = ((event & 0x00000fff) >> 0) * Caca_h / caca_get_height();
			posted += SDL_PrivateMouseMotion(0, 0, new_x, new_y);
		}
	} while ( posted );
}

void Caca_InitOSKeymap(_THIS)
{
    return;
}