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Merge #15670: refactor: combine Chain::findFirstBlockWithTime/findFirstBlockWithTimeAndHeight

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765c0b364d refactor: combine Chain::findFirstBlockWithTime/findFirstBlockWithTimeAndHeight (Antoine Riard)

Pull request description:

  As suggested in #14711, pass height to CChain::FindEarliestAtLeast to
  simplify Chain interface by combining findFirstBlockWithTime and
  findFirstBlockWithTimeAndHeight into one

ACKs for commit 765c0b:
  jnewbery:
    utACK 765c0b364d. Nice work @ariard!
  ryanofsky:
    utACK 765c0b364d. Looks good, thanks for implementing the suggestion!

Tree-SHA512: 63f98252a93da95f08c0b6325ea98f717aa9ae4036d17eaa6edbec68e5ddd65672d66a6af267b80c36311fffa9b415a47308e95ea7718b300b685e23d4e9e6ec
This commit is contained in:
MarcoFalke
2019-04-19 11:59:56 -04:00
parent b6a5583c4f 765c0b364d
commit 56376f3365
7 changed files with 42 additions and 52 deletions
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18
src/interfaces/chain.cpp
View File

@@ -84,29 +84,15 @@ class LockImpl : public Chain::Lock
CBlockIndex* block = ::chainActive[height];
return block && ((block->nStatus & BLOCK_HAVE_DATA) != 0) && block->nTx > 0;
}
Optional<int> findFirstBlockWithTime(int64_t time, uint256* hash) override
Optional<int> findFirstBlockWithTimeAndHeight(int64_t time, int height, uint256* hash) override
{
CBlockIndex* block = ::chainActive.FindEarliestAtLeast(time);
CBlockIndex* block = ::chainActive.FindEarliestAtLeast(time, height);
if (block) {
if (hash) *hash = block->GetBlockHash();
return block->nHeight;
}
return nullopt;
}
Optional<int> findFirstBlockWithTimeAndHeight(int64_t time, int height) override
{
// TODO: Could update CChain::FindEarliestAtLeast() to take a height
// parameter and use it with std::lower_bound() to make this
// implementation more efficient and allow combining
// findFirstBlockWithTime and findFirstBlockWithTimeAndHeight into one
// method.
for (CBlockIndex* block = ::chainActive[height]; block; block = ::chainActive.Next(block)) {
if (block->GetBlockTime() >= time) {
return block->nHeight;
}
}
return nullopt;
}
Optional<int> findPruned(int start_height, Optional<int> stop_height) override
{
if (::fPruneMode) {

17
src/interfaces/chain.h
View File

@@ -104,21 +104,12 @@ public:
//! pruned), and contains transactions.
virtual bool haveBlockOnDisk(int height) = 0;
//! Return height of the first block in the chain with timestamp equal
//! or greater than the given time, or nullopt if there is no block with
//! a high enough timestamp. Also return the block hash as an optional
//! output parameter (to avoid the cost of a second lookup in case this
//! information is needed.)
virtual Optional<int> findFirstBlockWithTime(int64_t time, uint256* hash) = 0;
//! Return height of the first block in the chain with timestamp equal
//! or greater than the given time and height equal or greater than the
//! given height, or nullopt if there is no such block.
//!
//! Calling this with height 0 is equivalent to calling
//! findFirstBlockWithTime, but less efficient because it requires a
//! linear instead of a binary search.
virtual Optional<int> findFirstBlockWithTimeAndHeight(int64_t time, int height) = 0;
//! given height, or nullopt if there is no block with a high enough
//! timestamp and height. Also return the block hash as an optional output parameter
//! (to avoid the cost of a second lookup in case this information is needed.)
virtual Optional<int> findFirstBlockWithTimeAndHeight(int64_t time, int height, uint256* hash) = 0;
//! Return height of last block in the specified range which is pruned, or
//! nullopt if no block in the range is pruned. Range is inclusive.