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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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44
src/coins.cpp
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@@ -52,30 +52,30 @@ bool CCoins::Spend(int nPos) {
}
bool CCoinsView::GetCoins(const uint256 &txid, CCoins &coins) { return false; }
bool CCoinsView::GetCoins(const uint256 &txid, CCoins &coins) const { return false; }
bool CCoinsView::SetCoins(const uint256 &txid, const CCoins &coins) { return false; }
bool CCoinsView::HaveCoins(const uint256 &txid) { return false; }
uint256 CCoinsView::GetBestBlock() { return uint256(0); }
bool CCoinsView::HaveCoins(const uint256 &txid) const { return false; }
uint256 CCoinsView::GetBestBlock() const { return uint256(0); }
bool CCoinsView::SetBestBlock(const uint256 &hashBlock) { return false; }
bool CCoinsView::BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlock) { return false; }
bool CCoinsView::GetStats(CCoinsStats &stats) { return false; }
bool CCoinsView::GetStats(CCoinsStats &stats) const { return false; }
CCoinsViewBacked::CCoinsViewBacked(CCoinsView &viewIn) : base(&viewIn) { }
bool CCoinsViewBacked::GetCoins(const uint256 &txid, CCoins &coins) { return base->GetCoins(txid, coins); }
bool CCoinsViewBacked::GetCoins(const uint256 &txid, CCoins &coins) const { return base->GetCoins(txid, coins); }
bool CCoinsViewBacked::SetCoins(const uint256 &txid, const CCoins &coins) { return base->SetCoins(txid, coins); }
bool CCoinsViewBacked::HaveCoins(const uint256 &txid) { return base->HaveCoins(txid); }
uint256 CCoinsViewBacked::GetBestBlock() { return base->GetBestBlock(); }
bool CCoinsViewBacked::HaveCoins(const uint256 &txid) const { return base->HaveCoins(txid); }
uint256 CCoinsViewBacked::GetBestBlock() const { return base->GetBestBlock(); }
bool CCoinsViewBacked::SetBestBlock(const uint256 &hashBlock) { return base->SetBestBlock(hashBlock); }
void CCoinsViewBacked::SetBackend(CCoinsView &viewIn) { base = &viewIn; }
bool CCoinsViewBacked::BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlock) { return base->BatchWrite(mapCoins, hashBlock); }
bool CCoinsViewBacked::GetStats(CCoinsStats &stats) { return base->GetStats(stats); }
bool CCoinsViewBacked::GetStats(CCoinsStats &stats) const { return base->GetStats(stats); }
CCoinsKeyHasher::CCoinsKeyHasher() : salt(GetRandHash()) {}
CCoinsViewCache::CCoinsViewCache(CCoinsView &baseIn, bool fDummy) : CCoinsViewBacked(baseIn), hashBlock(0) { }
bool CCoinsViewCache::GetCoins(const uint256 &txid, CCoins &coins) {
bool CCoinsViewCache::GetCoins(const uint256 &txid, CCoins &coins) const {
if (cacheCoins.count(txid)) {
coins = cacheCoins[txid];
return true;
@@ -99,19 +99,29 @@ CCoinsMap::iterator CCoinsViewCache::FetchCoins(const uint256 &txid) {
return ret;
}
CCoinsMap::const_iterator CCoinsViewCache::FetchCoins(const uint256 &txid) const {
/* Avoid redundant implementation with the const-cast. */
return const_cast<CCoinsViewCache*>(this)->FetchCoins(txid);
}
CCoins &CCoinsViewCache::GetCoins(const uint256 &txid) {
CCoinsMap::iterator it = FetchCoins(txid);
assert(it != cacheCoins.end());
return it->second;
}
const CCoins &CCoinsViewCache::GetCoins(const uint256 &txid) const {
/* Avoid redundant implementation with the const-cast. */
return const_cast<CCoinsViewCache*>(this)->GetCoins(txid);
}
bool CCoinsViewCache::SetCoins(const uint256 &txid, const CCoins &coins) {
cacheCoins[txid] = coins;
return true;
}
bool CCoinsViewCache::HaveCoins(const uint256 &txid) {
CCoinsMap::iterator it = FetchCoins(txid);
bool CCoinsViewCache::HaveCoins(const uint256 &txid) const {
CCoinsMap::const_iterator it = FetchCoins(txid);
// We're using vtx.empty() instead of IsPruned here for performance reasons,
// as we only care about the case where an transaction was replaced entirely
// in a reorganization (which wipes vout entirely, as opposed to spending
@@ -119,7 +129,7 @@ bool CCoinsViewCache::HaveCoins(const uint256 &txid) {
return (it != cacheCoins.end() && !it->second.vout.empty());
}
uint256 CCoinsViewCache::GetBestBlock() {
uint256 CCoinsViewCache::GetBestBlock() const {
if (hashBlock == uint256(0))
hashBlock = base->GetBestBlock();
return hashBlock;
@@ -146,18 +156,18 @@ bool CCoinsViewCache::Flush() {
return fOk;
}
unsigned int CCoinsViewCache::GetCacheSize() {
unsigned int CCoinsViewCache::GetCacheSize() const {
return cacheCoins.size();
}
const CTxOut &CCoinsViewCache::GetOutputFor(const CTxIn& input)
const CTxOut &CCoinsViewCache::GetOutputFor(const CTxIn& input) const
{
const CCoins &coins = GetCoins(input.prevout.hash);
assert(coins.IsAvailable(input.prevout.n));
return coins.vout[input.prevout.n];
}
int64_t CCoinsViewCache::GetValueIn(const CTransaction& tx)
int64_t CCoinsViewCache::GetValueIn(const CTransaction& tx) const
{
if (tx.IsCoinBase())
return 0;
@@ -169,7 +179,7 @@ int64_t CCoinsViewCache::GetValueIn(const CTransaction& tx)
return nResult;
}
bool CCoinsViewCache::HaveInputs(const CTransaction& tx)
bool CCoinsViewCache::HaveInputs(const CTransaction& tx) const
{
if (!tx.IsCoinBase()) {
// first check whether information about the prevout hash is available
@@ -190,7 +200,7 @@ bool CCoinsViewCache::HaveInputs(const CTransaction& tx)
return true;
}
double CCoinsViewCache::GetPriority(const CTransaction &tx, int nHeight)
double CCoinsViewCache::GetPriority(const CTransaction &tx, int nHeight) const
{
if (tx.IsCoinBase())
return 0.0;