63 lines
1.7 KiB
C++
63 lines
1.7 KiB
C++
#include "rocksdb/comparator.h"
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#include "rocksdb/env.h"
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#include <stdexcept>
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using std::string;
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using rocksdb::Comparator;
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using rocksdb::Slice;
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using rocksdb::Logger;
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namespace py_rocks {
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class ComparatorWrapper: public Comparator {
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public:
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typedef int (*compare_func)(
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void*,
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Logger*,
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string&,
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const Slice&,
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const Slice&);
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ComparatorWrapper(
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string name,
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void* compare_context,
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compare_func compare_callback):
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name(name),
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compare_context(compare_context),
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compare_callback(compare_callback)
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{}
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int Compare(const Slice& a, const Slice& b) const {
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string error_msg;
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int val;
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val = this->compare_callback(
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this->compare_context,
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this->info_log.get(),
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error_msg,
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a,
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b);
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if (error_msg.size()) {
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throw std::runtime_error(error_msg.c_str());
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}
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return val;
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}
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const char* Name() const {
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return this->name.c_str();
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}
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void FindShortestSeparator(string* start, const Slice& limit) const {}
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void FindShortSuccessor(string* key) const {}
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void set_info_log(std::shared_ptr<Logger> info_log) {
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this->info_log = info_log;
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}
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private:
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string name;
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void* compare_context;
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compare_func compare_callback;
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std::shared_ptr<Logger> info_log;
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};
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}
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