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txdb: Add Cursor() method to CCoinsView to iterate over UTXO set

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Add a method Cursor() to CCoinsView that returns a cursor which can be
used to iterate over the whole UTXO set.

- rpc: Change gettxoutsetinfo to use new Cursor method

- txdb: Remove GetStats method - Now that GetStats is implemented in
  terms of Cursor, remove it.
This commit is contained in:
Wladimir J. van der Laan
2016-03-28 18:18:30 +02:00
parent 1b2460bd58
commit 509cb006d5
6 changed files with 148 additions and 57 deletions
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8
src/coins.cpp
View File

@@ -45,7 +45,7 @@ bool CCoinsView::GetCoins(const uint256 &txid, CCoins &coins) const { return fal
bool CCoinsView::HaveCoins(const uint256 &txid) const { return false; }
uint256 CCoinsView::GetBestBlock() const { return uint256(); }
bool CCoinsView::BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlock) { return false; }
bool CCoinsView::GetStats(CCoinsStats &stats) const { return false; }
CCoinsViewCursor *CCoinsView::Cursor() const { return 0; }
CCoinsViewBacked::CCoinsViewBacked(CCoinsView *viewIn) : base(viewIn) { }
@@ -54,7 +54,7 @@ bool CCoinsViewBacked::HaveCoins(const uint256 &txid) const { return base->HaveC
uint256 CCoinsViewBacked::GetBestBlock() const { return base->GetBestBlock(); }
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) const { return base->GetStats(stats); }
CCoinsViewCursor *CCoinsViewBacked::Cursor() const { return base->Cursor(); }
CCoinsKeyHasher::CCoinsKeyHasher() : salt(GetRandHash()) {}
@@ -300,3 +300,7 @@ CCoinsModifier::~CCoinsModifier()
cache.cachedCoinsUsage += it->second.coins.DynamicMemoryUsage();
}
}
CCoinsViewCursor::~CCoinsViewCursor()
{
}