//

// RocksDBCallbackComparator.cpp

// ObjectiveRocks

//

// Created by Iska on 22/11/14.

// Copyright (c) 2014 BrainCookie. All rights reserved.

//

#import "RocksDBCallbackComparator.h"

class RocksDBCallbackComparatorImpl : public rocksdb::Comparator

{

private:

void* instance;

const char* name;

CompareCallback callback;

public:

RocksDBCallbackComparatorImpl(void* instance,

const char* name,

CompareCallback callback): instance(instance), name(name), callback(callback) {}

virtual const char* Name() const

{

return name;

}

virtual int Compare(const rocksdb::Slice& a, const rocksdb::Slice& b) const

{

return callback(instance, a, b);

}

virtual void FindShortestSeparator(std::string* start,

const rocksdb::Slice& limit) const {}

virtual void FindShortSuccessor(std::string* key) const {}

};

const rocksdb::Comparator* RocksDBCallbackComparator(void* instance, const char* name, CompareCallback callback) {

return new RocksDBCallbackComparatorImpl(instance, name, callback);

}