void encode(ArgumentEncoder* encoder, CFNumberRef number)
{
CFNumberType numberType = CFNumberGetType(number);
Vector<uint8_t> buffer(CFNumberGetByteSize(number));
bool result = CFNumberGetValue(number, numberType, buffer.data());
ASSERT_UNUSED(result, result);
encoder->encodeEnum(numberType);
encoder->encodeVariableLengthByteArray(buffer);
}
kern_return_t IOHIDGetParameter( io_connect_t handle, CFStringRef key,
IOByteCount maxSize, void * bytes, IOByteCount * actualSize )
{
kern_return_t kr;
// io_service_t hidsystem;
CFDataRef data;
CFNumberRef number;
CFNumberType numberType;
CFTypeRef typeRef = NULL;
IOByteCount copySize;
if (!bytes || !maxSize)
return kIOReturnBadArgument;
kr = IOHIDCopyCFTypeParameter(handle, key, &typeRef);
if ( kr != kIOReturnSuccess )
return kr;
if( !typeRef )
return kIOReturnBadArgument;
if (CFGetTypeID(typeRef) == CFDataGetTypeID())
{
data = (CFDataRef)typeRef;
copySize = CFDataGetLength(data);
*actualSize = copySize;
if( maxSize < copySize)
copySize = maxSize;
bcopy( CFDataGetBytePtr(data), bytes, copySize );
}
else if (CFGetTypeID(typeRef) == CFNumberGetTypeID())
{
number = (CFNumberRef)typeRef;
copySize = CFNumberGetByteSize(number);
*actualSize = copySize;
if( maxSize < copySize)
copySize = maxSize;
switch ( copySize )
{
case sizeof(UInt64):
numberType = kCFNumberSInt64Type;
break;
case sizeof(UInt32):
numberType = kCFNumberSInt32Type;
break;
case sizeof(UInt16):
numberType = kCFNumberSInt16Type;
break;
case sizeof(UInt8):
numberType = kCFNumberSInt8Type;
break;
default:
numberType = kCFNumberSInt32Type;
break;
}
CFNumberGetValue( number, numberType, bytes );
}
else
{
kr = kIOReturnBadArgument;
}
CFRelease(typeRef);
return( kr );
}
