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author | Wladimir J. van der Laan <laanwj@gmail.com> | 2016-04-15 16:36:39 +0200 |
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committer | Wladimir J. van der Laan <laanwj@gmail.com> | 2016-04-15 16:43:21 +0200 |
commit | 9e47fcec1798e1db9a32ae243605e8245ffdb273 (patch) | |
tree | 233e8ae0b6d19e5e42b791b26bbc43c514f430c7 /src/txdb.h | |
parent | be14ca5e8c0f0e8cd8ef511ccb9c41f245d62fbf (diff) | |
parent | 509cb006d514cece5ab7680094f033c8dc8a2318 (diff) | |
download | bitcoin-9e47fcec1798e1db9a32ae243605e8245ffdb273.tar.xz |
Merge #7756: Add cursor to iterate over utxo set, use this in `gettxoutsetinfo`
509cb00 txdb: Add Cursor() method to CCoinsView to iterate over UTXO set (Wladimir J. van der Laan)
Diffstat (limited to 'src/txdb.h')
-rw-r--r-- | src/txdb.h | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/src/txdb.h b/src/txdb.h index 22e0c5704c..749802f0e5 100644 --- a/src/txdb.h +++ b/src/txdb.h @@ -26,6 +26,8 @@ static const int64_t nMaxDbCache = sizeof(void*) > 4 ? 16384 : 1024; //! min. -dbcache in (MiB) static const int64_t nMinDbCache = 4; +class CCoinsViewDBCursor; + /** CCoinsView backed by the coin database (chainstate/) */ class CCoinsViewDB : public CCoinsView { @@ -38,7 +40,29 @@ public: bool HaveCoins(const uint256 &txid) const; uint256 GetBestBlock() const; bool BatchWrite(CCoinsMap &mapCoins, const uint256 &hashBlock); - bool GetStats(CCoinsStats &stats) const; + CCoinsViewCursor *Cursor() const; +}; + +/** Specialization of CCoinsViewCursor to iterate over a CCoinsViewDB */ +class CCoinsViewDBCursor: public CCoinsViewCursor +{ +public: + ~CCoinsViewDBCursor() {} + + bool GetKey(uint256 &key) const; + bool GetValue(CCoins &coins) const; + unsigned int GetValueSize() const; + + bool Valid() const; + void Next(); + +private: + CCoinsViewDBCursor(CDBIterator* pcursorIn, const uint256 &hashBlockIn): + CCoinsViewCursor(hashBlockIn), pcursor(pcursorIn) {} + boost::scoped_ptr<CDBIterator> pcursor; + std::pair<char, uint256> keyTmp; + + friend class CCoinsViewDB; }; /** Access to the block database (blocks/index/) */ |