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-rw-r--r--src/dbwrapper.h19
1 files changed, 18 insertions, 1 deletions
diff --git a/src/dbwrapper.h b/src/dbwrapper.h
index 2cbb47dbaf..54092f9f59 100644
--- a/src/dbwrapper.h
+++ b/src/dbwrapper.h
@@ -177,7 +177,7 @@ class CDBWrapper
{
friend const std::vector<unsigned char>& dbwrapper_private::GetObfuscateKey(const CDBWrapper &w);
private:
- //! custom environment this database is using (may be NULL in case of default environment)
+ //! custom environment this database is using (may be nullptr in case of default environment)
leveldb::Env* penv;
//! database options used
@@ -321,6 +321,23 @@ public:
pdb->GetApproximateSizes(&range, 1, &size);
return size;
}
+
+ /**
+ * Compact a certain range of keys in the database.
+ */
+ template<typename K>
+ void CompactRange(const K& key_begin, const K& key_end) const
+ {
+ CDataStream ssKey1(SER_DISK, CLIENT_VERSION), ssKey2(SER_DISK, CLIENT_VERSION);
+ ssKey1.reserve(DBWRAPPER_PREALLOC_KEY_SIZE);
+ ssKey2.reserve(DBWRAPPER_PREALLOC_KEY_SIZE);
+ ssKey1 << key_begin;
+ ssKey2 << key_end;
+ leveldb::Slice slKey1(ssKey1.data(), ssKey1.size());
+ leveldb::Slice slKey2(ssKey2.data(), ssKey2.size());
+ pdb->CompactRange(&slKey1, &slKey2);
+ }
+
};
#endif // BITCOIN_DBWRAPPER_H