ds_view.h

内存数据库

#ifndef __DS_VIEW_H__
#define __DS_VIEW_H__

#include "ds_table.h"

#define VIEW_NAME_MAXLEN			20


typedef long	(*DSV_FILTERPROC)( LPOSITION pos );
typedef long	(*DSV_COMPAREPROC)( LPOSITION pos );
typedef	void	(*DSV_UPDATEPROC)( OPER_TYPE, LPOSITION pos, INT field );


typedef struct
{
	DWORD				attribute;			

	char				view_name[VIEW_NAME_MAXLEN+1];

	HTABLE				hOwner_table;

	UINT				field_num;	
	UINT				record_num;

	DS_ARRAY			field_info;
	
	DS_LIST				record_list;

	LPOSITION			current_position;

	INT					orderby_field;

	DSV_FILTERPROC		filter_proc;

	DSV_COMPAREPROC		compare_proc;

	DSV_UPDATEPROC		update_proc;
	
}DS_VIEW;

#define HVIEW			DS_VIEW*
#define PPOSITION		LPOSITION*



HVIEW	DSV_CreateView( HTABLE hTable, const char* view_name, UINT field_num );
BOOL	DSV_DestroyView( HVIEW hView );
BOOL	DSV_GetFieldInfo( HVIEW hView, UINT field_index, TB_FIELD* fieldinfo );
BOOL	DSV_AttachField( HVIEW hView, UINT view_field, UINT table_field );
BOOL	DSV_GetFieldInfo( HVIEW hView, UINT field_index, TB_FIELD* fieldinfo );
BOOL	DSV_AddRecord( HVIEW hView );
BOOL	DSV_AddViewRecord( HVIEW hView, LPOSITION table_pos );
BOOL	DSV_DeleteCurRecord( HVIEW hView );
BOOL	DSV_DeleteRecord( HVIEW hView, LPOSITION pos );
BOOL	DSV_DeleteViewRecord( HVIEW hView, LPOSITION pos );
BOOL	DSV_SetFieldValue( HVIEW hView, UINT field_index, TB_VARIANT field_value );
BOOL	DSV_GetFieldValue( HVIEW hView, UINT field_index, TB_VARIANT* field_value );
void	DSV_MoveNext( HVIEW hView );
void	DSV_MovePrev( HVIEW hView );
void	DSV_MoveFirst( HVIEW hView );
void	DSV_MoveLast( HVIEW hView );
int		DSV_GetRecordCount( HVIEW hView );
BOOL	DSV_IsView( HVIEW hView );
void	DSV_RefreshView( HVIEW hView );
BOOL	DSV_SetFilter( HVIEW hView, FILTERPROC filterproc );
void	DSV_Clear( HVIEW hView );
void	DSV_Update( HVIEW hView, OPER_EVENT *oper_event );
BOOL	DSV_IsEOF( HVIEW hView );
BOOL	DSV_IsBOF( HVIEW hView );
void	DSV_SetAbsolutePostion( HVIEW hView, LPOSITION pos );
BOOL	DSV_SetParam( HVIEW hView, DSV_FILTERPROC filterproc, DSV_COMPAREPROC compareproc, DSV_UPDATEPROC updateproc );
INT		DSV_GetFieldCount( HVIEW hView );



#endif