src/joystick/nds/SDL_sysjoystick.c
author Sam Lantinga <slouken@libsdl.org>
Wed, 16 Feb 2011 17:17:21 -0800
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permissions -rw-r--r--
Fixed bug 1122 (spinlock fails to compile with -march=armv4t)
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997-2011 Sam Lantinga
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    This library is free software; you can redistribute it and/or
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    modify it under the terms of the GNU Lesser General Public
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    License as published by the Free Software Foundation; either
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    version 2.1 of the License, or (at your option) any later version.
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    This library is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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    Lesser General Public License for more details.
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    You should have received a copy of the GNU Lesser General Public
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    License along with this library; if not, write to the Free Software
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    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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    Sam Lantinga
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    slouken@libsdl.org
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*/
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#include "SDL_config.h"
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#ifdef SDL_JOYSTICK_NDS
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/* This is the system specific header for the SDL joystick API */
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#include <nds.h>
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#include <stdio.h>              /* For the definition of NULL */
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#include "SDL_error.h"
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#include "SDL_events.h"
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#include "SDL_joystick.h"
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#include "../SDL_sysjoystick.h"
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#include "../SDL_joystick_c.h"
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#include "../../video/nds/SDL_ndsevents_c.h"
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/* Function to scan the system for joysticks.
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 * This function should set SDL_numjoysticks to the number of available
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 * joysticks.  Joystick 0 should be the system default joystick.
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 * It should return 0, or -1 on an unrecoverable fatal error.
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 */
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int
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SDL_SYS_JoystickInit(void)
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{
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    SDL_numjoysticks = 1;
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    return (1);
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}
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/* Function to get the device-dependent name of a joystick */
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const char *
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SDL_SYS_JoystickName(int index)
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{
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    if (!index)
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        return "NDS builtin joypad";
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    SDL_SetError("No joystick available with that index");
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    return (NULL);
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}
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/* Function to open a joystick for use.
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   The joystick to open is specified by the index field of the joystick.
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   This should fill the nbuttons and naxes fields of the joystick structure.
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   It returns 0, or -1 if there is an error.
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 */
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int
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SDL_SYS_JoystickOpen(SDL_Joystick * joystick)
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{
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    joystick->nbuttons = 8;
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    joystick->nhats = 0;
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    joystick->nballs = 0;
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    joystick->naxes = 2;
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    return 0;
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}
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/* Function to update the state of a joystick - called as a device poll.
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 * This function shouldn't update the joystick structure directly,
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 * but instead should call SDL_PrivateJoystick*() to deliver events
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 * and update joystick device state.
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 */
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    void
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SDL_SYS_JoystickUpdate(SDL_Joystick * joystick)
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{
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    u32 keysd, keysu;
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    int magnitude = 16384;
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        /*scanKeys(); - this is done in PumpEvents, because touch uses it too */ 
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        keysd = keysDown();
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    keysu = keysUp();
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    if ((keysd & KEY_UP)) {
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        SDL_PrivateJoystickAxis(joystick, 1, -magnitude);
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    }
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    if ((keysd & KEY_DOWN)) {
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        SDL_PrivateJoystickAxis(joystick, 1, magnitude);
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    }
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    if ((keysd & KEY_LEFT)) {
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        SDL_PrivateJoystickAxis(joystick, 0, -magnitude);
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    }
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    if ((keysd & KEY_RIGHT)) {
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        SDL_PrivateJoystickAxis(joystick, 0, magnitude);
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    }
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    if ((keysu & (KEY_UP | KEY_DOWN))) {
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        SDL_PrivateJoystickAxis(joystick, 1, 0);
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    }
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    if ((keysu & (KEY_LEFT | KEY_RIGHT))) {
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        SDL_PrivateJoystickAxis(joystick, 0, 0);
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    }
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    if ((keysd & KEY_A)) {
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        SDL_PrivateJoystickButton(joystick, 0, SDL_PRESSED);
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    }
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    if ((keysd & KEY_B)) {
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        SDL_PrivateJoystickButton(joystick, 1, SDL_PRESSED);
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    }
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    if ((keysd & KEY_X)) {
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        SDL_PrivateJoystickButton(joystick, 2, SDL_PRESSED);
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    }
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    if ((keysd & KEY_Y)) {
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        SDL_PrivateJoystickButton(joystick, 3, SDL_PRESSED);
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    }
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    if ((keysd & KEY_L)) {
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        SDL_PrivateJoystickButton(joystick, 4, SDL_PRESSED);
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    }
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    if ((keysd & KEY_R)) {
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        SDL_PrivateJoystickButton(joystick, 5, SDL_PRESSED);
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    }
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    if ((keysd & KEY_SELECT)) {
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        SDL_PrivateJoystickButton(joystick, 6, SDL_PRESSED);
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    }
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    if ((keysd & KEY_START)) {
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        SDL_PrivateJoystickButton(joystick, 7, SDL_PRESSED);
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    }
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    if ((keysu & KEY_A)) {
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        SDL_PrivateJoystickButton(joystick, 0, SDL_RELEASED);
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    }
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    if ((keysu & KEY_B)) {
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        SDL_PrivateJoystickButton(joystick, 1, SDL_RELEASED);
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    }
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    if ((keysu & KEY_X)) {
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        SDL_PrivateJoystickButton(joystick, 2, SDL_RELEASED);
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    }
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    if ((keysu & KEY_Y)) {
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        SDL_PrivateJoystickButton(joystick, 3, SDL_RELEASED);
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    }
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    if ((keysu & KEY_L)) {
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        SDL_PrivateJoystickButton(joystick, 4, SDL_RELEASED);
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    }
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    if ((keysu & KEY_R)) {
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        SDL_PrivateJoystickButton(joystick, 5, SDL_RELEASED);
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    }
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    if ((keysu & KEY_SELECT)) {
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        SDL_PrivateJoystickButton(joystick, 6, SDL_RELEASED);
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    }
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    if ((keysu & KEY_START)) {
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        SDL_PrivateJoystickButton(joystick, 7, SDL_RELEASED);
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    }
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}
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/* Function to close a joystick after use */
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void
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SDL_SYS_JoystickClose(SDL_Joystick * joystick)
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{
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}
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/* Function to perform any system-specific joystick related cleanup */
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void
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SDL_SYS_JoystickQuit(void)
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{
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}
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#endif /* SDL_JOYSTICK_NDS */