guicast/bchash.h

   1 #ifndef BCHASH_H
   2 #define BCHASH_H
   3
   4
   5
   6 // Hash table with persistent storage in stringfiles.
   7
   8
   9 #include "bcwindowbase.inc"
  10 #include "stringfile.inc"
  11 #include "units.h"
  12
  13
  14 class BC_Hash
  15 {
  16 public:
  17         BC_Hash();
  18         BC_Hash(char *filename);
  19         virtual ~BC_Hash();
  20
  21         int load();        // load from disk file
  22         int save();        // save to disk file
  23         int load_string(char *string);        // load from string
  24         int save_string(char* &string);       // save to new string
  25         void save_stringfile(StringFile *file);
  26         void load_stringfile(StringFile *file);
  27         int update(char *name, Freq value); // update a value if it exists
  28         int update(char *name, double value); // update a value if it exists
  29         int update(char *name, float value); // update a value if it exists
  30         int update(char *name, int32_t value); // update a value if it exists
  31         int update(char *name, int64_t value); // update a value if it exists
  32         int update(char *name, char *value); // create it if it doesn't
  33
  34         double get(char *name, double default_);   // retrieve a value if it exists
  35         float get(char *name, float default_);   // retrieve a value if it exists
  36         int32_t get(char *name, int32_t default_);   // retrieve a value if it exists
  37         int64_t get(char *name, int64_t default_);   // retrieve a value if it exists
  38         char* get(char *name, char *default_); // return 1 if it doesn't
  39
  40 // Update values with values from another table.
  41 // Adds values that don't exist and updates existing values.
  42         void copy_from(BC_Hash *src);
  43 // Return 1 if the tables are equivalent
  44         int equivalent(BC_Hash *src);
  45
  46         void dump();
  47
  48
  49 private:
  50 // Reallocate table so at least total entries exist
  51         void reallocate_table(int total);
  52
  53         char **names;  // list of string names
  54         char **values;    // list of values
  55         int total;             // number of defaults
  56         int allocated;         // allocated defaults
  57         char filename[BCTEXTLEN];        // filename the defaults are stored in
  58 };
  59
  60 #endif