symtab.h

FastDb是高效的内存数据库系统

//-< SYMTAB.H >----------------------------------------------------*--------*
// FastDB                    Version 1.0         (c) 1999  GARRET    *     ?  *
// (Main Memory Database Management System)                          *   /\|  *
//                                                                   *  /  \  *
//                          Created:     20-Nov-98    K.A. Knizhnik  * / [] \ *
//                          Last update: 10-Dec-98    K.A. Knizhnik  * GARRET *
//-------------------------------------------------------------------*--------*
// Symbol table interface
//-------------------------------------------------------------------*--------*

#ifndef __SYMTAB_H__
#define __SYMTAB_H__

#ifndef CLONE_IDENTIFIERS
#define FASTDB_CLONE_ANY_IDENTIFIER false
#else
#define FASTDB_CLONE_ANY_IDENTIFIER true
#endif

class  FASTDB_DLL_ENTRY dbSymbolTable
{

  struct HashTableItem
  {
    HashTableItem* next;
    char*          str;
    unsigned       hash;
    int            tag;
    byte           allocated;

    ~HashTableItem()
    {
      if (allocated)
      {
        delete[] str;
      }
    }
  };

  static HashTableItem* hashTable[];

public:
  ~dbSymbolTable();
  static dbSymbolTable instance;

  static int add
    (char* &str, int tag,  bool allocate = true);
};

#endif