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Add LES::dirIsEmpty function to check if a directory is empty

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This commit is contained in:
David Schwartz
2014-01-03 15:07:17 -08:00
committed by Vinnie Falco
parent d474d68566
commit 00c87ca2dd
3 changed files with 19 additions and 2 deletions
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16
src/ripple_app/ledger/LedgerEntrySet.cpp
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@@ -633,6 +633,22 @@ TER LedgerEntrySet::dirCount (uint256 const& uRootIndex, uint32& uCount)
return tesSUCCESS;
}
bool LedgerEntrySet::dirIsEmpty (uint256 const& uRootIndex)
{
uint64 uNodeDir = 0;
SLE::pointer sleNode = entryCache (ltDIR_NODE, Ledger::getDirNodeIndex (uRootIndex, uNodeDir));
if (!sleNode)
return true;
if (!sleNode->getFieldV256 (sfIndexes).peekValue ().empty ())
return false;
// If there's another page, it must be non-empty
return sleNode->getFieldU64 (sfIndexNext) == 0;
}
// <-- uNodeDir: For deletion, present to make dirDelete efficient.
// --> uRootIndex: The index of the base of the directory. Nodes are based off of this.
// --> uLedgerIndex: Value to add to directory.