/**
* Parse non-digit length modifiers and set the corresponding flag in
* flags_return.
*
* @return the number of bytes parsed
*/
static int parse_length_modifier(const char *format, size_t len, int *flags_return)
{
int idx = 0;
int length_modifier = 0;
while (idx < len) {
switch (format[idx]) {
case 'l':
BUG_RETURN_VAL(length_modifier & LMOD_SHORT, 0);
if (length_modifier & LMOD_LONG)
length_modifier |= LMOD_LONGLONG;
else
length_modifier |= LMOD_LONG;
break;
case 'h':
BUG_RETURN_VAL(length_modifier & (LMOD_LONG|LMOD_LONGLONG), 0);
length_modifier |= LMOD_SHORT;
/* gcc says 'short int' is promoted to 'int' when
* passed through '...', so ignored during
* processing */
break;
case 'z':
length_modifier |= LMOD_SIZET;
break;
default:
goto out;
}
idx++;
}
out:
*flags_return = length_modifier;
return idx;
}
/**
* Use this function to obtain a DeviceVelocityPtr for a device. Will return NULL if
* the predictable acceleration scheme is not in effect.
*/
DeviceVelocityPtr
GetDevicePredictableAccelData(DeviceIntPtr dev)
{
BUG_RETURN_VAL(!dev, NULL);
if (dev->valuator &&
dev->valuator->accelScheme.AccelSchemeProc ==
acceleratePointerPredictable &&
dev->valuator->accelScheme.accelData != NULL) {
return ((PredictableAccelSchemePtr)
dev->valuator->accelScheme.accelData)->vel;
}
return NULL;
}
