void MultiWayGroup::generate_code(StatementList *x,
IInteger bound_below,
IInteger bound_above) {
Expression *low_check = NULL;
Expression *high_check = NULL;
DataType *bool_type = get_type_builder(_env)->get_boolean_type();
// if there are no more than two entries, build if statements
int lab_count = get_label_count();
if (lab_count <= 2) {
for (int i=0;i < lab_count; i ++) {
MultiWayBranchStatement::case_pair pair = _statement->get_case(i);
low_check = create_binary_expression(_env,
bool_type,
k_is_equal_to,
create_var_use(_decision),
ie(pair.first));
x->append_statement(create_branch_statement(_env,low_check,pair.second));
}
x->append_statement(create_jump_statement(_env,_default_lab));
delete _statement;
_statement = 0;
return;
}
if (bound_below.is_undetermined() || (_low_bound > bound_below + 1)) {
low_check = create_binary_expression(_env,
bool_type,
k_is_less_than,
create_var_use(_decision),
ie(_low_bound));
x->append_statement(create_branch_statement(_env,low_check,_default_lab));
}
if (bound_above.is_undetermined() || (_high_bound < bound_above)) {
high_check = create_binary_expression(_env,
bool_type,
k_is_greater_than,
create_var_use(_decision),
ie(_high_bound));
x->append_statement(create_branch_statement(_env,high_check,_default_lab));
}
// in fill the statement so that missing entries are added so as to
// complete the table
IInteger next_value = _low_bound;
while (next_value < _high_bound) {
if (!_statement->lookup_case(next_value)) {
_statement->insert_case(next_value,_default_lab);
}
next_value ++;
}
x->append_statement(_statement);
}
bool LabelManager::add_label(const std::string& name)
{
// Make sure that a label with the specified name does not already exist.
if(has_label(name)) return false;
// Make sure that we're not trying to exceed the maximum number of labels.
if(get_label_count() == get_max_label_count()) return false;
// Add the new label.
SpaintVoxel::Label label = static_cast<SpaintVoxel::Label>(m_labelAllocator.allocate());
m_labelProperties.insert(std::make_pair(label, std::make_pair(name, colours[label])));
m_labelsByName.insert(std::make_pair(name, label));
return true;
}
