void CShaderParams<value_t>::SetMany(const CShaderParams& params)
{
SItems items;
// set_union merges the two sorted lists into a new sorted list;
// if two items are equivalent (i.e. equal names, possibly different values)
// then the one from the first list is kept
std::set_union(
params.m_Items->items.begin(), params.m_Items->items.end(),
m_Items->items.begin(), m_Items->items.end(),
std::inserter(items.items, items.items.begin()),
ItemNameCmp<value_t>());
items.RecalcHash();
m_Items = GetInterned(items);
}
void CShaderParams<value_t>::Set(CStrIntern name, const value_t& value)
{
SItems items = *m_Items;
typename SItems::Item addedItem = std::make_pair(name, value);
// Add the new item in a way that preserves the sortedness and uniqueness of item names
for (typename std::vector<typename SItems::Item>::iterator it = items.items.begin(); ; ++it)
{
if (it == items.items.end() || addedItem.first < it->first)
{
items.items.insert(it, addedItem);
break;
}
else if (addedItem.first == it->first)
{
it->second = addedItem.second;
break;
}
}
items.RecalcHash();
m_Items = GetInterned(items);
}
CShaderParams<value_t>::CShaderParams()
{
SItems items;
items.RecalcHash();
m_Items = GetInterned(items);
}
CShaderParams<value_t> CShaderParams<value_t>::CreateEmpty()
{
SItems items;
items.RecalcHash();
return CShaderParams(GetInterned(items));
}