int seekLowerBound(fstring key, llong* id, valvec<byte>* retKey) override {
assert(key.size() == sizeof(Int));
if (key.size() != sizeof(Int)) {
THROW_STD(invalid_argument,
"key.size must be sizeof(Int)=%d", int(sizeof(Int)));
}
auto owner = static_cast<const SeqNumIndex*>(m_index.get());
Int keyId = unaligned_load<Int>(key.udata());
if (keyId <= owner->m_min) {
m_curr = 0;
return -1;
}
else if (keyId > owner->m_min + owner->m_cnt) {
m_curr = owner->m_cnt;
*id = owner->m_cnt - 1;
Int forwardMax = owner->m_min + owner->m_cnt - 1;
retKey->assign((const byte*)&forwardMax, sizeof(Int));
return 1;
}
else {
keyId -= owner->m_min;
m_curr = keyId;
*id = keyId;
retKey->assign(key.udata(), key.size());
return 0;
}
}
bool SeqNumIndex<Int>::insert(fstring key, llong id, DbContext*) {
assert(key.size() == sizeof(Int));
assert(id >= 0);
if (key.size() != sizeof(Int)) {
THROW_STD(invalid_argument,
"key.size must be sizeof(Int)=%d", int(sizeof(Int)));
}
Int keyId = unaligned_load<Int>(key.udata());
if (keyId != m_min + id) {
THROW_STD(invalid_argument,
"key must be consistent with id in SeqNumIndex");
}
if (llong(m_cnt) < id + 1) {
m_cnt = id + 1;
}
return 1;
}
bool SeqNumIndex<Int>::replace(fstring key, llong id, llong newId, DbContext*) {
assert(key.size() == sizeof(Int));
assert(id >= 0);
assert(id == newId);
if (key.size() != sizeof(Int)) {
THROW_STD(invalid_argument,
"key.size must be sizeof(Int)=%d", int(sizeof(Int)));
}
if (id != newId) {
THROW_STD(invalid_argument,
"replace with different id is not supported by SeqNumIndex");
}
Int keyId = unaligned_load<Int>(key.udata());
if (keyId != m_min + newId) {
THROW_STD(invalid_argument,
"key must be consistent with id in SeqNumIndex");
}
return 1;
}
