void MockReadonlyStore::build(const Schema& schema, SortableStrVec& data) {
size_t fixlen = schema.getFixedRowLen();
if (0 == fixlen) {
if (data.str_size() >= UINT32_MAX) {
THROW_STD(length_error,
"keys.str_size=%lld is too large", llong(data.str_size()));
}
// reuse memory of keys.m_index
auto offsets = (uint32_t*)data.m_index.data();
size_t rows = data.m_index.size();
for (size_t i = 0; i < rows; ++i) {
uint32_t offset = uint32_t(data.m_index[i].offset);
offsets[i] = offset;
}
offsets[rows] = data.str_size();
BOOST_STATIC_ASSERT(sizeof(SortableStrVec::SEntry) == 4*3);
m_rows.offsets.risk_set_data(offsets);
m_rows.offsets.risk_set_size(rows + 1);
m_rows.offsets.risk_set_capacity(3 * rows);
m_rows.offsets.shrink_to_fit();
data.m_index.risk_release_ownership();
#if !defined(NDEBUG)
assert(data.m_strpool.size() == m_rows.offsets.back());
for (size_t i = 0; i < rows; ++i) {
assert(m_rows.offsets[i] < m_rows.offsets[i+1]);
}
#endif
}
m_rows.strpool.swap((valvec<char>&)data.m_strpool);
m_fixedLen = fixlen;
}
static void patchStrVec(SortableStrVec& strVec, size_t fixlen) {
const size_t rows = strVec.str_size() / fixlen;
assert(strVec.str_size() % rows == 0);
strVec.m_index.resize_no_init(rows);
for (size_t i = 0; i < rows; ++i) {
strVec.m_index[i].seq_id = i;
strVec.m_index[i].length = fixlen;
strVec.m_index[i].offset = fixlen * i;
}
}
void
MockReadonlyIndex::build(SortableStrVec& keys) {
const Schema* schema = m_schema;
const byte* base = keys.m_strpool.data();
size_t fixlen = schema->getFixedRowLen();
if (fixlen) {
assert(keys.m_index.size() == 0);
assert(keys.str_size() % fixlen == 0);
m_ids.resize_no_init(keys.str_size() / fixlen);
for (size_t i = 0; i < m_ids.size(); ++i) m_ids[i] = i;
std::sort(m_ids.begin(), m_ids.end(), [=](size_t x, size_t y) {
fstring xs(base + fixlen * x, fixlen);
fstring ys(base + fixlen * y, fixlen);
int r = schema->compareData(xs, ys);
if (r) return r < 0;
else return x < y;
});
}
else {
if (keys.str_size() >= UINT32_MAX) {
THROW_STD(length_error,
"keys.str_size=%lld is too large", llong(keys.str_size()));
}
// reuse memory of keys.m_index
auto offsets = (uint32_t*)keys.m_index.data();
size_t rows = keys.m_index.size();
m_ids.resize_no_init(rows);
for (size_t i = 0; i < rows; ++i) m_ids[i] = i;
for (size_t i = 0; i < rows; ++i) {
uint32_t offset = uint32_t(keys.m_index[i].offset);
offsets[i] = offset;
}
offsets[rows] = keys.str_size();
std::sort(m_ids.begin(), m_ids.end(), [=](size_t x, size_t y) {
size_t xoff0 = offsets[x], xoff1 = offsets[x+1];
size_t yoff0 = offsets[y], yoff1 = offsets[y+1];
fstring xs(base + xoff0, xoff1 - xoff0);
fstring ys(base + yoff0, yoff1 - yoff0);
int r = schema->compareData(xs, ys);
if (r) return r < 0;
else return x < y;
});
BOOST_STATIC_ASSERT(sizeof(SortableStrVec::SEntry) == 4*3);
m_keys.offsets.risk_set_data(offsets);
m_keys.offsets.risk_set_size(rows + 1);
m_keys.offsets.risk_set_capacity(3 * rows);
m_keys.offsets.shrink_to_fit();
keys.m_index.risk_release_ownership();
}
m_keys.strpool.swap((valvec<char>&)keys.m_strpool);
m_fixedLen = fixlen;
}