vocabulary_map_writer.h

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#ifndef META_VOCABULARY_MAP_WRITER_H_
#define META_VOCABULARY_MAP_WRITER_H_

#include <cstdint>
#include <fstream>
#include <stdexcept>
#include <string>

namespace meta
{
namespace index
{

class vocabulary_map_writer
{
  public:
    vocabulary_map_writer(const std::string& path, uint16_t block_size = 4096);

    ~vocabulary_map_writer();

    void insert(const std::string& term);

    class vocabulary_map_writer_exception : public std::runtime_error
    {
        using std::runtime_error::runtime_error;
    };

  private:
    void write_padding();

    void flush();

    std::ofstream file_;

    uint64_t file_write_pos_;

    std::ofstream inverse_file_;

    std::string path_;

    uint16_t block_size_;

    uint64_t num_terms_;

    uint16_t remaining_block_space_;

    uint64_t written_nodes_;
};
}
}
#endif