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comparison src/joystick/SDL_joystick.c @ 2713:0906692aa6a4

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Final merge of Google Summer of Code 2008 work... Force Feedback for SDL by Edgar Simo, mentored by Ryan C. Gordon
author Sam Lantinga <slouken@libsdl.org>
date Mon, 25 Aug 2008 09:55:03 +0000
parents c121d94672cb
children 99210400e8b9
comparison
equal deleted inserted replaced
2712:c4e697245676 2713:0906692aa6a4
191 } 191 }
192 } 192 }
193 return (opened); 193 return (opened);
194 } 194 }
195 195
196 static int 196
197 ValidJoystick(SDL_Joystick ** joystick) 197 /*
198 * Checks to make sure the joystick is valid.
199 */
200 int
201 SDL_PrivateJoystickValid(SDL_Joystick ** joystick)
198 { 202 {
199 int valid; 203 int valid;
200 204
201 if (*joystick == NULL) { 205 if (*joystick == NULL) {
202 *joystick = default_joystick; 206 *joystick = default_joystick;
214 * Get the device index of an opened joystick. 218 * Get the device index of an opened joystick.
215 */ 219 */
216 int 220 int
217 SDL_JoystickIndex(SDL_Joystick * joystick) 221 SDL_JoystickIndex(SDL_Joystick * joystick)
218 { 222 {
219 if (!ValidJoystick(&joystick)) { 223 if (!SDL_PrivateJoystickValid(&joystick)) {
220 return (-1); 224 return (-1);
221 } 225 }
222 return (joystick->index); 226 return (joystick->index);
223 } 227 }
224 228
226 * Get the number of multi-dimensional axis controls on a joystick 230 * Get the number of multi-dimensional axis controls on a joystick
227 */ 231 */
228 int 232 int
229 SDL_JoystickNumAxes(SDL_Joystick * joystick) 233 SDL_JoystickNumAxes(SDL_Joystick * joystick)
230 { 234 {
231 if (!ValidJoystick(&joystick)) { 235 if (!SDL_PrivateJoystickValid(&joystick)) {
232 return (-1); 236 return (-1);
233 } 237 }
234 return (joystick->naxes); 238 return (joystick->naxes);
235 } 239 }
236 240
238 * Get the number of hats on a joystick 242 * Get the number of hats on a joystick
239 */ 243 */
240 int 244 int
241 SDL_JoystickNumHats(SDL_Joystick * joystick) 245 SDL_JoystickNumHats(SDL_Joystick * joystick)
242 { 246 {
243 if (!ValidJoystick(&joystick)) { 247 if (!SDL_PrivateJoystickValid(&joystick)) {
244 return (-1); 248 return (-1);
245 } 249 }
246 return (joystick->nhats); 250 return (joystick->nhats);
247 } 251 }
248 252
250 * Get the number of trackballs on a joystick 254 * Get the number of trackballs on a joystick
251 */ 255 */
252 int 256 int
253 SDL_JoystickNumBalls(SDL_Joystick * joystick) 257 SDL_JoystickNumBalls(SDL_Joystick * joystick)
254 { 258 {
255 if (!ValidJoystick(&joystick)) { 259 if (!SDL_PrivateJoystickValid(&joystick)) {
256 return (-1); 260 return (-1);
257 } 261 }
258 return (joystick->nballs); 262 return (joystick->nballs);
259 } 263 }
260 264
262 * Get the number of buttons on a joystick 266 * Get the number of buttons on a joystick
263 */ 267 */
264 int 268 int
265 SDL_JoystickNumButtons(SDL_Joystick * joystick) 269 SDL_JoystickNumButtons(SDL_Joystick * joystick)
266 { 270 {
267 if (!ValidJoystick(&joystick)) { 271 if (!SDL_PrivateJoystickValid(&joystick)) {
268 return (-1); 272 return (-1);
269 } 273 }
270 return (joystick->nbuttons); 274 return (joystick->nbuttons);
271 } 275 }
272 276
276 Sint16 280 Sint16
277 SDL_JoystickGetAxis(SDL_Joystick * joystick, int axis) 281 SDL_JoystickGetAxis(SDL_Joystick * joystick, int axis)
278 { 282 {
279 Sint16 state; 283 Sint16 state;
280 284
281 if (!ValidJoystick(&joystick)) { 285 if (!SDL_PrivateJoystickValid(&joystick)) {
282 return (0); 286 return (0);
283 } 287 }
284 if (axis < joystick->naxes) { 288 if (axis < joystick->naxes) {
285 state = joystick->axes[axis]; 289 state = joystick->axes[axis];
286 } else { 290 } else {
296 Uint8 300 Uint8
297 SDL_JoystickGetHat(SDL_Joystick * joystick, int hat) 301 SDL_JoystickGetHat(SDL_Joystick * joystick, int hat)
298 { 302 {
299 Uint8 state; 303 Uint8 state;
300 304
301 if (!ValidJoystick(&joystick)) { 305 if (!SDL_PrivateJoystickValid(&joystick)) {
302 return (0); 306 return (0);
303 } 307 }
304 if (hat < joystick->nhats) { 308 if (hat < joystick->nhats) {
305 state = joystick->hats[hat]; 309 state = joystick->hats[hat];
306 } else { 310 } else {
316 int 320 int
317 SDL_JoystickGetBall(SDL_Joystick * joystick, int ball, int *dx, int *dy) 321 SDL_JoystickGetBall(SDL_Joystick * joystick, int ball, int *dx, int *dy)
318 { 322 {
319 int retval; 323 int retval;
320 324
321 if (!ValidJoystick(&joystick)) { 325 if (!SDL_PrivateJoystickValid(&joystick)) {
322 return (-1); 326 return (-1);
323 } 327 }
324 328
325 retval = 0; 329 retval = 0;
326 if (ball < joystick->nballs) { 330 if (ball < joystick->nballs) {
345 Uint8 349 Uint8
346 SDL_JoystickGetButton(SDL_Joystick * joystick, int button) 350 SDL_JoystickGetButton(SDL_Joystick * joystick, int button)
347 { 351 {
348 Uint8 state; 352 Uint8 state;
349 353
350 if (!ValidJoystick(&joystick)) { 354 if (!SDL_PrivateJoystickValid(&joystick)) {
351 return (0); 355 return (0);
352 } 356 }
353 if (button < joystick->nbuttons) { 357 if (button < joystick->nbuttons) {
354 state = joystick->buttons[button]; 358 state = joystick->buttons[button];
355 } else { 359 } else {
365 void 369 void
366 SDL_JoystickClose(SDL_Joystick * joystick) 370 SDL_JoystickClose(SDL_Joystick * joystick)
367 { 371 {
368 int i; 372 int i;
369 373
370 if (!ValidJoystick(&joystick)) { 374 if (!SDL_PrivateJoystickValid(&joystick)) {
371 return; 375 return;
372 } 376 }
373 377
374 /* First decrement ref count */ 378 /* First decrement ref count */
375 if (--joystick->ref_count > 0) { 379 if (--joystick->ref_count > 0) {