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Make appropriate getter-routines "const" in CCoinsView.

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Mark the "Get"/"Have" routines in CCoinsView and subclasses as "const".
This commit is contained in:
Daniel Kraft
2014-07-19 16:42:48 +02:00
parent ffb4c210bc
commit a3dc587a62
6 changed files with 66 additions and 48 deletions
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13
src/txdb.cpp
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@@ -27,7 +27,7 @@ void static BatchWriteHashBestChain(CLevelDBBatch &batch, const uint256 &hash) {
CCoinsViewDB::CCoinsViewDB(size_t nCacheSize, bool fMemory, bool fWipe) : db(GetDataDir() / "chainstate", nCacheSize, fMemory, fWipe) {
}
bool CCoinsViewDB::GetCoins(const uint256 &txid, CCoins &coins) {
bool CCoinsViewDB::GetCoins(const uint256 &txid, CCoins &coins) const {
return db.Read(make_pair('c', txid), coins);
}
@@ -37,11 +37,11 @@ bool CCoinsViewDB::SetCoins(const uint256 &txid, const CCoins &coins) {
return db.WriteBatch(batch);
}
bool CCoinsViewDB::HaveCoins(const uint256 &txid) {
bool CCoinsViewDB::HaveCoins(const uint256 &txid) const {
return db.Exists(make_pair('c', txid));
}
uint256 CCoinsViewDB::GetBestBlock() {
uint256 CCoinsViewDB::GetBestBlock() const {
uint256 hashBestChain;
if (!db.Read('B', hashBestChain))
return uint256(0);
@@ -105,8 +105,11 @@ bool CBlockTreeDB::ReadLastBlockFile(int &nFile) {
return Read('l', nFile);
}
bool CCoinsViewDB::GetStats(CCoinsStats &stats) {
boost::scoped_ptr<leveldb::Iterator> pcursor(db.NewIterator());
bool CCoinsViewDB::GetStats(CCoinsStats &stats) const {
/* It seems that there are no "const iterators" for LevelDB. Since we
only need read operations on it, use a const-cast to get around
that restriction. */
leveldb::Iterator *pcursor = const_cast<CLevelDBWrapper*>(&db)->NewIterator();
pcursor->SeekToFirst();
CHashWriter ss(SER_GETHASH, PROTOCOL_VERSION);