hvirtual/guicast/bchash.h

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#ifndef BCHASH_H
#define BCHASH_H



// Hash table with persistent storage in stringfiles.


#include "bcwindowbase.inc"
#include "stringfile.inc"
#include "units.h"


class BC_Hash
{
public:
        BC_Hash();
        BC_Hash(char *filename);
        virtual ~BC_Hash();

        int load();        // load from disk file
        int save();        // save to disk file
        int load_string(char *string);        // load from string
        int save_string(char* &string);       // save to new string
        void save_stringfile(StringFile *file);
        void load_stringfile(StringFile *file);
        int update(char *name, Freq value); // update a value if it exists
        int update(char *name, double value); // update a value if it exists
        int update(char *name, float value); // update a value if it exists
        int update(char *name, int32_t value); // update a value if it exists
        int update(char *name, int64_t value); // update a value if it exists
        int update(char *name, char *value); // create it if it doesn't

        double get(char *name, double default_);   // retrieve a value if it exists
        float get(char *name, float default_);   // retrieve a value if it exists
        int32_t get(char *name, int32_t default_);   // retrieve a value if it exists
        int64_t get(char *name, int64_t default_);   // retrieve a value if it exists
        char* get(char *name, char *default_); // return 1 if it doesn't

// Update values with values from another table.
// Adds values that don't exist and updates existing values.
        void copy_from(BC_Hash *src);
// Return 1 if the tables are equivalent
        int equivalent(BC_Hash *src);

        void dump();


private:
// Reallocate table so at least total entries exist
        void reallocate_table(int total);

        char **names;  // list of string names
        char **values;    // list of values
        int total;             // number of defaults
        int allocated;         // allocated defaults
        char filename[BCTEXTLEN];        // filename the defaults are stored in
};

#endif

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