Mercurial > sdl-ios-xcode
diff src/joystick/linux/SDL_sysjoystick.c @ 871:9cc9e2462d9a
Avoid FPE with Linux 2.6
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Fri, 05 Mar 2004 15:09:18 +0000 |
| parents | b8d311d90021 |
| children | e7be95d758e8 |
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--- a/src/joystick/linux/SDL_sysjoystick.c Thu Mar 04 05:41:57 2004 +0000 +++ b/src/joystick/linux/SDL_sysjoystick.c Fri Mar 05 15:09:18 2004 +0000 @@ -383,7 +383,7 @@ static SDL_bool EV_ConfigJoystick(SDL_Joystick *joystick, int fd) { - int i; + int i, t; unsigned long keybit[40]; unsigned long absbit[40]; unsigned long relbit[40]; @@ -436,12 +436,18 @@ joystick->hwdata->abs_correct[i].used = 0; } else { joystick->hwdata->abs_correct[i].used = 1; - joystick->hwdata->abs_correct[i].coef[0] = - (values[2] + values[1]) / 2 - values[4]; - joystick->hwdata->abs_correct[i].coef[1] = - (values[2] + values[1]) / 2 + values[4]; - joystick->hwdata->abs_correct[i].coef[2] = - (1 << 29) / ((values[2] - values[1]) / 2 - 2 * values[4]); + t = (2 - values[4]); + if ( t != 0 ) { + joystick->hwdata->abs_correct[i].coef[0] = (values[2] + values[1]) / t; + } + t = (2 + values[4]); + if ( t != 0 ) { + joystick->hwdata->abs_correct[i].coef[1] = (values[2] + values[1]) / t; + } + t = ((values[2] - values[1]) / 2 - 2 * values[4]); + if ( t != 0 ) { + joystick->hwdata->abs_correct[i].coef[2] = (1 << 29) / t; + } } ++joystick->naxes; }