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Avoid FPE with Linux 2.6

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--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%40872
This commit is contained in:
Sam Lantinga 2004-03-05 15:09:18 +00:00
parent 7023285617
commit ea8c53b7fe
1 changed files with 13 additions and 7 deletions
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20
src/joystick/linux/SDL_sysjoystick.c
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@ -383,7 +383,7 @@ static SDL_bool JS_ConfigJoystick(SDL_Joystick *joystick, int fd)
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 @@ static SDL_bool EV_ConfigJoystick(SDL_Joystick *joystick, int fd)
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;
}