dbsrv.h

Visual C++实践与提高-刘刀桂, 孟繁晶编著

#ifndef _DBSERVER_INCLUDE
#define _DBSERVER_INCLUDE

typedef long HRESULT;

#define DEF_EXPORT _declspec(dllexport)

class CDB {
  // Interfaces
  public:
	  	// Interface for data access
		HRESULT DEF_EXPORT Read(short nTable, short nRow, LPWSTR lpszData);
		HRESULT DEF_EXPORT Write(short nTable, short nRow, LPCWSTR lpszData);

		// Interface for database management
		HRESULT DEF_EXPORT Create(short &nTable, LPCWSTR lpszName);
		HRESULT DEF_EXPORT Delete(short nTable);

		// Interfase para obtenber informacion sobre la base de datos
		HRESULT DEF_EXPORT GetNumTables(short &nNumTables);
		HRESULT DEF_EXPORT GetTableName(short nTable, LPWSTR lpszName);
		HRESULT DEF_EXPORT GetNumRows(short nTable, short &nRows);

		ULONG DEF_EXPORT Release(); //CPPTOCOM: need to free an object in the DLL, since it was allocated here

  // Implementation
  private:
  	CPtrArray m_arrTables; 	 // Array of pointers to CStringArray (the "database")
		CStringArray m_arrNames; // Array of table names
	public:
		~CDB();
};

class CDBSrvFactory {
	// Interface
	public:
		HRESULT DEF_EXPORT CreateDB(CDB** ppObject);
		ULONG   DEF_EXPORT Release();
};

HRESULT DEF_EXPORT DllGetClassFactoryObject(CDBSrvFactory ** ppObject);

#endif