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-rw-r--r--src/chain.cpp49
-rw-r--r--src/chain.h8
-rw-r--r--src/main.cpp63
3 files changed, 59 insertions, 61 deletions
diff --git a/src/chain.cpp b/src/chain.cpp
index e13c047861..3dbaf5a36a 100644
--- a/src/chain.cpp
+++ b/src/chain.cpp
@@ -57,3 +57,52 @@ const CBlockIndex *CChain::FindFork(const CBlockIndex *pindex) const {
pindex = pindex->pprev;
return pindex;
}
+
+/** Turn the lowest '1' bit in the binary representation of a number into a '0'. */
+int static inline InvertLowestOne(int n) { return n & (n - 1); }
+
+/** Compute what height to jump back to with the CBlockIndex::pskip pointer. */
+int static inline GetSkipHeight(int height) {
+ if (height < 2)
+ return 0;
+
+ // Determine which height to jump back to. Any number strictly lower than height is acceptable,
+ // but the following expression seems to perform well in simulations (max 110 steps to go back
+ // up to 2**18 blocks).
+ return (height & 1) ? InvertLowestOne(InvertLowestOne(height - 1)) + 1 : InvertLowestOne(height);
+}
+
+CBlockIndex* CBlockIndex::GetAncestor(int height)
+{
+ if (height > nHeight || height < 0)
+ return NULL;
+
+ CBlockIndex* pindexWalk = this;
+ int heightWalk = nHeight;
+ while (heightWalk > height) {
+ int heightSkip = GetSkipHeight(heightWalk);
+ int heightSkipPrev = GetSkipHeight(heightWalk - 1);
+ if (heightSkip == height ||
+ (heightSkip > height && !(heightSkipPrev < heightSkip - 2 &&
+ heightSkipPrev >= height))) {
+ // Only follow pskip if pprev->pskip isn't better than pskip->pprev.
+ pindexWalk = pindexWalk->pskip;
+ heightWalk = heightSkip;
+ } else {
+ pindexWalk = pindexWalk->pprev;
+ heightWalk--;
+ }
+ }
+ return pindexWalk;
+}
+
+const CBlockIndex* CBlockIndex::GetAncestor(int height) const
+{
+ return const_cast<CBlockIndex*>(this)->GetAncestor(height);
+}
+
+void CBlockIndex::BuildSkip()
+{
+ if (pprev)
+ pskip = pprev->GetAncestor(GetSkipHeight(nHeight));
+}
diff --git a/src/chain.h b/src/chain.h
index 1c2d89933b..a8a6b4dd64 100644
--- a/src/chain.h
+++ b/src/chain.h
@@ -236,14 +236,6 @@ public:
return pbegin[(pend - pbegin)/2];
}
- /**
- * Returns true if there are nRequired or more blocks of minVersion or above
- * in the last Params().ToCheckBlockUpgradeMajority() blocks, starting at pstart
- * and going backwards.
- */
- static bool IsSuperMajority(int minVersion, const CBlockIndex* pstart,
- unsigned int nRequired);
-
std::string ToString() const
{
return strprintf("CBlockIndex(pprev=%p, nHeight=%d, merkle=%s, hashBlock=%s)",
diff --git a/src/main.cpp b/src/main.cpp
index 50e63e93e4..7533c32614 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -67,6 +67,13 @@ map<uint256, COrphanTx> mapOrphanTransactions;
map<uint256, set<uint256> > mapOrphanTransactionsByPrev;
void EraseOrphansFor(NodeId peer);
+/**
+ * Returns true if there are nRequired or more blocks of minVersion or above
+ * in the last Params().ToCheckBlockUpgradeMajority() blocks, starting at pstart
+ * and going backwards.
+ */
+static bool IsSuperMajority(int minVersion, const CBlockIndex* pstart, unsigned int nRequired);
+
/** Constant stuff for coinbase transactions we create: */
CScript COINBASE_FLAGS;
@@ -2479,8 +2486,7 @@ bool ContextualCheckBlockHeader(const CBlockHeader& block, CValidationState& sta
return state.DoS(100, error("%s : forked chain older than last checkpoint (height %d)", __func__, nHeight));
// Reject block.nVersion=1 blocks when 95% (75% on testnet) of the network has upgraded:
- if (block.nVersion < 2 &&
- CBlockIndex::IsSuperMajority(2, pindexPrev, Params().RejectBlockOutdatedMajority()))
+ if (block.nVersion < 2 && IsSuperMajority(2, pindexPrev, Params().RejectBlockOutdatedMajority()))
{
return state.Invalid(error("%s : rejected nVersion=1 block", __func__),
REJECT_OBSOLETE, "bad-version");
@@ -2501,8 +2507,7 @@ bool ContextualCheckBlock(const CBlock& block, CValidationState& state, CBlockIn
// Enforce block.nVersion=2 rule that the coinbase starts with serialized block height
// if 750 of the last 1,000 blocks are version 2 or greater (51/100 if testnet):
- if (block.nVersion >= 2 &&
- CBlockIndex::IsSuperMajority(2, pindexPrev, Params().EnforceBlockUpgradeMajority()))
+ if (block.nVersion >= 2 && IsSuperMajority(2, pindexPrev, Params().EnforceBlockUpgradeMajority()))
{
CScript expect = CScript() << nHeight;
if (block.vtx[0].vin[0].scriptSig.size() < expect.size() ||
@@ -2600,7 +2605,7 @@ bool AcceptBlock(CBlock& block, CValidationState& state, CBlockIndex** ppindex,
return true;
}
-bool CBlockIndex::IsSuperMajority(int minVersion, const CBlockIndex* pstart, unsigned int nRequired)
+static bool IsSuperMajority(int minVersion, const CBlockIndex* pstart, unsigned int nRequired)
{
unsigned int nToCheck = Params().ToCheckBlockUpgradeMajority();
unsigned int nFound = 0;
@@ -2613,54 +2618,6 @@ bool CBlockIndex::IsSuperMajority(int minVersion, const CBlockIndex* pstart, uns
return (nFound >= nRequired);
}
-/** Turn the lowest '1' bit in the binary representation of a number into a '0'. */
-int static inline InvertLowestOne(int n) { return n & (n - 1); }
-
-/** Compute what height to jump back to with the CBlockIndex::pskip pointer. */
-int static inline GetSkipHeight(int height) {
- if (height < 2)
- return 0;
-
- // Determine which height to jump back to. Any number strictly lower than height is acceptable,
- // but the following expression seems to perform well in simulations (max 110 steps to go back
- // up to 2**18 blocks).
- return (height & 1) ? InvertLowestOne(InvertLowestOne(height - 1)) + 1 : InvertLowestOne(height);
-}
-
-CBlockIndex* CBlockIndex::GetAncestor(int height)
-{
- if (height > nHeight || height < 0)
- return NULL;
-
- CBlockIndex* pindexWalk = this;
- int heightWalk = nHeight;
- while (heightWalk > height) {
- int heightSkip = GetSkipHeight(heightWalk);
- int heightSkipPrev = GetSkipHeight(heightWalk - 1);
- if (heightSkip == height ||
- (heightSkip > height && !(heightSkipPrev < heightSkip - 2 &&
- heightSkipPrev >= height))) {
- // Only follow pskip if pprev->pskip isn't better than pskip->pprev.
- pindexWalk = pindexWalk->pskip;
- heightWalk = heightSkip;
- } else {
- pindexWalk = pindexWalk->pprev;
- heightWalk--;
- }
- }
- return pindexWalk;
-}
-
-const CBlockIndex* CBlockIndex::GetAncestor(int height) const
-{
- return const_cast<CBlockIndex*>(this)->GetAncestor(height);
-}
-
-void CBlockIndex::BuildSkip()
-{
- if (pprev)
- pskip = pprev->GetAncestor(GetSkipHeight(nHeight));
-}
bool ProcessNewBlock(CValidationState &state, CNode* pfrom, CBlock* pblock, CDiskBlockPos *dbp)
{
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-07 14:32:11 +0000