DOCLIENT.H

//-------------------------------------------------------------------- 
// Microsoft OLE DB ISAPI Sample 
// Copyight(c) 1996 Microsoft Corporation.  All Rights Reserved. 
// 
// @doc 
// 
// @module DOCLIENT.H | Headers for DOCLIENT.CPP 
// 
// @rev 1 | 06-11-96 | Created 
// 
 
#include <afxisapi.h> 
//Constants 
#define MAXBUFLEN256//display buffer size 
#define MAXDATALEN25//maximum data length per column 
#define NUMROWS_CHUNK20                    // Number of Rows to Grab at a Time 
#define DEFAULT_CBMAXLENGTH40                    // cbMaxLength for binding 
#define COLUMN_ALIGNVAL8 
#define MAX_ROW_SIZE1000 
#define NUMBER_OF_PROPERTY_SETS1 
 
 
#define ROUND_UP( Size, Amount ) (((DWORD)(Size) +  ((Amount) - 1)) & ~((Amount) - 1)) 
//Data Structures **************************************************************** 
struct COLUMNDATA  
{ 
DWORDdwLength;// length of data (not space allocated) 
DBSTATUSwStatus;// status of column 
SHORT       wReserved;  // padding 
BYTEbData[1];// data here and beyond 
}; 
 
 
//Exposed Functions **************************************************************** 
HRESULT GetAndWrite 
( 
IRowset*pIRowset, 
ULONG   cMaxRowSize, 
    HACCESSOR   hAccessor, 
    DBBINDING*rgBind,     
    ULONGcBind,     
    DBCOLUMNINFO*pColumnInfo,   
    ULONGcCol, 
CHttpServerContext* pCtxt 
); 
 
 
HRESULT ConnectDB  
( 
IDBCreateCommand **ppIDBCreateCommand_out,    //@param | 
LPCSTR pstrDNS,                                //@param | Login Inforamtion  
LPCSTR pstrUserName,                           //@param | Login Inforamtion 
LPCSTR pstrPassword,                           //@param | Login Inforamtion 
CHttpServerContext* pCtxt   //@param|  
); 
  
 
HRESULT SetAndExecute  
( 
WCHAR * wszSQLCommand,                   //@param  IN  | SQL command 
IDBCreateCommand * pIDBCreateCommand,    //@param  IN  |   
IRowset**  ppIRowset_out,                //@param  OUT | Pointer to set of rows  
DBCOLUMNINFO ** ppColumnInfo_out,        //@param  OUT | array of DBCOLUMNINFO structures  
WCHAR ** ppStringBuffer_out, 
ULONG * pcCol,                           //@param  OUT | Number of columns   
DBBINDING ** rgBind,                     //@param      
ULONG * pcBind,                          //@param     
HACCESSOR * phAccessor,                  //@param     
ULONG * pcbMaxRowSize,                   //@param     
CHttpServerContext* pCtxt     //@param  IN | Server Context 
); 
 
 void FreeEnvironment  
( 
IRowset*pIRowset,                //@param IN | Pointer to set of rows  
HACCESSOR   hAccessor, //@param IN | Accessor Handle 
DBCOLUMNINFO*pColumnInfo,  //@param IN | DBCOLUMNINFO array pointer  
WCHAR * pStringBuffer                    //@param IN | String Buffer contining the info about columns 
); 
 
 
 
//Internal functions ************************************************************ 
void PrintErrorInfo  
( 
IUnknown * pBadObject,                  //@param IN | Pointer to the object where error happened 
REFIID IID_BadIntereface,          //@param IN | Interface that caused the error 
CHttpServerContext* pCtxt//@param IN | Output place 
); 
 
HRESULT SetInitializationData  
( 
LPCSTR pstrDNS,//@param IN  | DNS Name 
LPCSTR pstrUserName,//@param IN  | User Name 
LPCSTR pstrPassword,//@param IN  | Passwd 
DBPROPSET rgPropertySet[],//@param OUT | Array of propery sets (only one) 
CHttpServerContext* pCtxt//@param IN  | Web page context 
); 
 
HRESULT SetupBindings 
( 
ULONG cCol, 
DBCOLUMNINFO*pColumnInfo, 
DBBINDING*rgBind_out, 
ULONG*pcBind_out, 
ULONG*pcMaxRowSize_out 
); 
 
 
HRESULT CleanupRowset 
( 
IRowset*pIRowset, 
HACCESSOR hAccessor 
); 
 
 
void DumpRow 
( 
    DBBINDING* rgBind, 
    ULONGcBind, 
    BYTE* pData, 
CHttpServerContext* pCtxt 
);