void EnsureCapacity(TContainer& container, typename TContainer::size_type index)
{
// if we need to resize
if(container.size() <= index)
{
// then we shall resize!
container.resize(index + 1);
}
}
friend typename TContainer::template rebind<result_of<TRecord>>::type select(const TContainer& recs, const select_query& q)
{
using TReturnContainer = typename TContainer::template rebind<result_of<TRecord> >::type;
TReturnContainer ret;
ret.reserve(recs.size());
for(const TRecord& cur : recs) {
ret.push_back(select(cur, q));
}
return ret;
}
static QStringList toQStringList(TContainer inContainer)
{
QStringList outContainer;
for (size_t index=0; index < inContainer.size(); ++index)
{
outContainer.append(QString::number(inContainer.at(index)));
}
return outContainer;
};
inline
std::vector<std::shared_ptr<TContainer> >
split(TContainer & container, std::size_t const PARTS)
{
std::vector<std::shared_ptr<TContainer> > split_container;
split_container.resize(PARTS);
std::size_t const container_original_size = container.size();
for (long i = static_cast<long>(PARTS) - 1; i >= 0; --i)
{
std::size_t const part_size = container_original_size / PARTS +
(container_original_size % PARTS > static_cast<std::size_t>(i));
split_container[i] =
std::make_shared<TContainer>(std::make_move_iterator(std::next(container.end(), -part_size)),
std::make_move_iterator(container.end())
);
// Make sure the container is smaller now
if (container.size() > i * (container_original_size / PARTS + 1))
container.resize(i * (container_original_size / PARTS + 1));
}
return split_container;
}
hash_t Pearson_Compare(const TContainer& data)
{
hash_t hash;
hash.fill(0);
for (size_t j = 0; j < HASH_SIZE; ++j)
{
uint8_t subhash = etl::PEARSON_LOOKUP[(data[0] + j) % 256];
for (size_t i = 1; i < data.size(); ++i)
{
subhash = etl::PEARSON_LOOKUP[subhash ^ data[i]];
}
hash[j] = subhash;
}
return hash;
}
jobjectArray ToJavaArray(JNIEnv * env, jclass clazz, TContainer const & src, TToJavaFn && toJavaFn)
{
return ToJavaArray(env, clazz, begin(src), end(src), src.size(), forward<TToJavaFn>(toJavaFn));
}