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WGI_JoystickUpdate: bounds-check array sizes

This commit is contained in:
Shawn Hoffman 2022-08-30 13:54:58 -07:00 committed by Sam Lantinga
parent cdaafcec0d
commit ca915b1884
1 changed files with 19 additions and 9 deletions
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28
src/joystick/windows/SDL_windows_gaming_input.c
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@ -798,26 +798,36 @@ WGI_JoystickUpdate(SDL_Joystick *joystick)
{
struct joystick_hwdata *hwdata = joystick->hwdata;
HRESULT hr;
UINT32 nbuttons = joystick->nbuttons;
boolean *buttons = SDL_stack_alloc(boolean, nbuttons);
UINT32 nhats = joystick->nhats;
__x_ABI_CWindows_CGaming_CInput_CGameControllerSwitchPosition *hats = SDL_stack_alloc(__x_ABI_CWindows_CGaming_CInput_CGameControllerSwitchPosition, nhats);
UINT32 naxes = joystick->naxes;
DOUBLE *axes = SDL_stack_alloc(DOUBLE, naxes);
UINT32 nbuttons = SDL_min(joystick->nbuttons, SDL_MAX_UINT8);
boolean *buttons = NULL;
UINT32 nhats = SDL_min(joystick->nhats, SDL_MAX_UINT8);
__x_ABI_CWindows_CGaming_CInput_CGameControllerSwitchPosition *hats = NULL;
UINT32 naxes = SDL_min(joystick->naxes, SDL_MAX_UINT8);
DOUBLE *axes = NULL;
UINT64 timestamp;
if (nbuttons > 0) {
buttons = SDL_stack_alloc(boolean, nbuttons);
}
if (nhats > 0) {
hats = SDL_stack_alloc(__x_ABI_CWindows_CGaming_CInput_CGameControllerSwitchPosition, nhats);
}
if (naxes > 0) {
axes = SDL_stack_alloc(DOUBLE, naxes);
}
hr = __x_ABI_CWindows_CGaming_CInput_CIRawGameController_GetCurrentReading(hwdata->controller, nbuttons, buttons, nhats, hats, naxes, axes, &timestamp);
if (SUCCEEDED(hr) && timestamp != hwdata->timestamp) {
UINT32 i;
for (i = 0; i < nbuttons; ++i) {
SDL_PrivateJoystickButton(joystick, i, buttons[i]);
SDL_PrivateJoystickButton(joystick, (Uint8)i, buttons[i]);
}
for (i = 0; i < nhats; ++i) {
SDL_PrivateJoystickHat(joystick, i, ConvertHatValue(hats[i]));
SDL_PrivateJoystickHat(joystick, (Uint8)i, ConvertHatValue(hats[i]));
}
for (i = 0; i < naxes; ++i) {
SDL_PrivateJoystickAxis(joystick, i, (int)(axes[i] * 65535) - 32768);
SDL_PrivateJoystickAxis(joystick, (Uint8)i, (Sint16)((int) (axes[i] * 65535) - 32768));
}
hwdata->timestamp = timestamp;
}