Logger.h

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#ifndef LOGGER_H_
#define LOGGER_H_

#define LOGGER_MAX_FILE_NAME_SIZE 256

#include <stdint.h>
#include <stdio.h>
#include <vector>


namespace genie
{
    namespace query {struct Query;}
    namespace table {struct inv_table;}
    namespace table {struct inv_compr_table;}

namespace utility
{


class Logger
{
public:

    static const int NONE = 0;
    static const int ALERT = 1;
    static const int INFO = 2;
    static const int VERBOSE = 3;
    static const int DEBUG = 4;
    static const char * const LEVEL_NAMES[];



    virtual ~Logger();

    static void exit(void);

    static int log(int level, const char *fmt, ...);

    static void logQueries(int level, std::vector<genie::query::Query> &queries, size_t max_print_len = 128);

    static void logResults(int level, std::vector<genie::query::Query> &queries, std::vector<int> &result,
        std::vector<int> &result_count, size_t max_print_len = 128);

    static void logTable(int level, genie::table::inv_table *table, size_t max_print_len = 32);

    static void logInvLists(int level, const std::vector<std::vector<uint32_t> > &rawInvertedLists,
        size_t max_print_len = 128);

    static void set_level(int level);

    static int get_level();

    static void set_logfile_name(const char *name);

    static const char * get_logfile_name();

private:

    static Logger * logger;

    int log_level;

    char logfile_name[LOGGER_MAX_FILE_NAME_SIZE];

    FILE * logfile;

    Logger(int level);

    static Logger* _logger(void);
};

} // namespace utility
} // namesapce genie

#endif