void ColumnFixedString::getPermutation(bool reverse, size_t limit, int /*nan_direction_hint*/, Permutation & res) const
{
size_t s = size();
res.resize(s);
for (size_t i = 0; i < s; ++i)
res[i] = i;
if (limit >= s)
limit = 0;
if (limit)
{
if (reverse)
std::partial_sort(res.begin(), res.begin() + limit, res.end(), less<false>(*this));
else
std::partial_sort(res.begin(), res.begin() + limit, res.end(), less<true>(*this));
}
else
{
if (reverse)
std::sort(res.begin(), res.end(), less<false>(*this));
else
std::sort(res.begin(), res.end(), less<true>(*this));
}
}
void ColumnString::getPermutationWithCollation(const Collator & collator, bool reverse, size_t limit, Permutation & res) const
{
size_t s = offsets.size();
res.resize(s);
for (size_t i = 0; i < s; ++i)
res[i] = i;
if (limit >= s)
limit = 0;
if (limit)
{
if (reverse)
std::partial_sort(res.begin(), res.begin() + limit, res.end(), lessWithCollation<false>(*this, collator));
else
std::partial_sort(res.begin(), res.begin() + limit, res.end(), lessWithCollation<true>(*this, collator));
}
else
{
if (reverse)
std::sort(res.begin(), res.end(), lessWithCollation<false>(*this, collator));
else
std::sort(res.begin(), res.end(), lessWithCollation<true>(*this, collator));
}
}
void ColumnTuple::getPermutation(bool reverse, size_t limit, int nan_direction_hint, Permutation & res) const
{
size_t rows = size();
res.resize(rows);
for (size_t i = 0; i < rows; ++i)
res[i] = i;
if (limit >= rows)
limit = 0;
if (limit)
{
if (reverse)
std::partial_sort(res.begin(), res.begin() + limit, res.end(), Less<false>(columns, nan_direction_hint));
else
std::partial_sort(res.begin(), res.begin() + limit, res.end(), Less<true>(columns, nan_direction_hint));
}
else
{
if (reverse)
std::sort(res.begin(), res.end(), Less<false>(columns, nan_direction_hint));
else
std::sort(res.begin(), res.end(), Less<true>(columns, nan_direction_hint));
}
}
Permutation K81_perm(long a, long b, long c, long d) {
Permutation p;
p.resize(4);
p[0] = a; p[1] = b; p[2] = c; p[3] = d;
return p;
}
