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0c8e728476
Implement ReadKey and HasKey of BerkeleyROBatch, and Next of BerkeleyROCursor. Also adds the containers for records to BerkeleyRODatabase so that BerkeleyROBatch will be able to access the records.
63 lines
1.6 KiB
C++
63 lines
1.6 KiB
C++
// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#include <wallet/migrate.h>
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namespace wallet {
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void BerkeleyRODatabase::Open()
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{
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}
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std::unique_ptr<DatabaseBatch> BerkeleyRODatabase::MakeBatch(bool flush_on_close)
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{
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return std::make_unique<BerkeleyROBatch>(*this);
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}
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bool BerkeleyRODatabase::Backup(const std::string& dest) const
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{
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return false;
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}
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bool BerkeleyROBatch::ReadKey(DataStream&& key, DataStream& value)
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{
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SerializeData key_data{key.begin(), key.end()};
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const auto it{m_database.m_records.find(key_data)};
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if (it == m_database.m_records.end()) {
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return false;
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}
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auto val = it->second;
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value.clear();
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value.write(Span(val));
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return true;
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}
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bool BerkeleyROBatch::HasKey(DataStream&& key)
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{
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SerializeData key_data{key.begin(), key.end()};
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return m_database.m_records.count(key_data) > 0;
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}
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BerkeleyROCursor::BerkeleyROCursor(const BerkeleyRODatabase& database, Span<const std::byte> prefix)
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: m_database(database)
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{
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std::tie(m_cursor, m_cursor_end) = m_database.m_records.equal_range(BytePrefix{prefix});
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}
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DatabaseCursor::Status BerkeleyROCursor::Next(DataStream& ssKey, DataStream& ssValue)
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{
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if (m_cursor == m_cursor_end) {
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return DatabaseCursor::Status::DONE;
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}
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ssKey.write(Span(m_cursor->first));
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ssValue.write(Span(m_cursor->second));
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m_cursor++;
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return DatabaseCursor::Status::MORE;
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}
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std::unique_ptr<DatabaseCursor> BerkeleyROBatch::GetNewPrefixCursor(Span<const std::byte> prefix)
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{
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return std::make_unique<BerkeleyROCursor>(m_database, prefix);
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}
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} // namespace wallet
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