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openmw/components/esmloader/record.hpp

46 lines
1.2 KiB
C++

#ifndef OPENMW_COMPONENTS_ESMLOADER_RECORD_H
#define OPENMW_COMPONENTS_ESMLOADER_RECORD_H
#include <components/esm3/loadcell.hpp>
#include <components/misc/algorithm.hpp>
#include <algorithm>
#include <utility>
#include <vector>
namespace EsmLoader
{
template <class T>
struct Record
{
bool mDeleted;
T mValue;
template <class... Args>
explicit Record(bool deleted, Args&&... args)
: mDeleted(deleted)
, mValue(std::forward<Args>(args)...)
{
}
};
template <class T>
using Records = std::vector<Record<T>>;
template <class T, class GetKey>
inline std::vector<T> prepareRecords(Records<T>& records, const GetKey& getKey)
{
const auto greaterByKey = [&](const auto& l, const auto& r) { return getKey(r) < getKey(l); };
const auto equalByKey = [&](const auto& l, const auto& r) { return getKey(l) == getKey(r); };
std::stable_sort(records.begin(), records.end(), greaterByKey);
std::vector<T> result;
Misc::forEachUnique(records.rbegin(), records.rend(), equalByKey, [&](const auto& v) {
if (!v.mDeleted)
result.emplace_back(std::move(v.mValue));
});
return result;
}
}
#endif