static int counter_get_data()

in counter-chrdev.c [454:521]

• 66 lines of code
• 20 McCabe index (conditional complexity)

static int counter_get_data(struct counter_device *const counter,
			    const struct counter_comp_node *const comp_node,
			    u64 *const value)
{
	const struct counter_comp *const comp = &comp_node->comp;
	void *const parent = comp_node->parent;
	u8 value_u8 = 0;
	u32 value_u32 = 0;
	int ret;

	if (comp_node->component.type == COUNTER_COMPONENT_NONE)
		return 0;

	switch (comp->type) {
	case COUNTER_COMP_U8:
	case COUNTER_COMP_BOOL:
		switch (comp_node->component.scope) {
		case COUNTER_SCOPE_DEVICE:
			ret = comp->device_u8_read(counter, &value_u8);
			break;
		case COUNTER_SCOPE_SIGNAL:
			ret = comp->signal_u8_read(counter, parent, &value_u8);
			break;
		case COUNTER_SCOPE_COUNT:
			ret = comp->count_u8_read(counter, parent, &value_u8);
			break;
		}
		*value = value_u8;
		return ret;
	case COUNTER_COMP_SIGNAL_LEVEL:
	case COUNTER_COMP_FUNCTION:
	case COUNTER_COMP_ENUM:
	case COUNTER_COMP_COUNT_DIRECTION:
	case COUNTER_COMP_COUNT_MODE:
		switch (comp_node->component.scope) {
		case COUNTER_SCOPE_DEVICE:
			ret = comp->device_u32_read(counter, &value_u32);
			break;
		case COUNTER_SCOPE_SIGNAL:
			ret = comp->signal_u32_read(counter, parent,
						    &value_u32);
			break;
		case COUNTER_SCOPE_COUNT:
			ret = comp->count_u32_read(counter, parent, &value_u32);
			break;
		}
		*value = value_u32;
		return ret;
	case COUNTER_COMP_U64:
		switch (comp_node->component.scope) {
		case COUNTER_SCOPE_DEVICE:
			return comp->device_u64_read(counter, value);
		case COUNTER_SCOPE_SIGNAL:
			return comp->signal_u64_read(counter, parent, value);
		case COUNTER_SCOPE_COUNT:
			return comp->count_u64_read(counter, parent, value);
		default:
			return -EINVAL;
		}
	case COUNTER_COMP_SYNAPSE_ACTION:
		ret = comp->action_read(counter, parent, comp->priv,
					&value_u32);
		*value = value_u32;
		return ret;
	default:
		return -EINVAL;
	}
}