driver_manager_defs.h

/* File: driver_manager_defs.h

** Author: Saikat Mukherjee

** Contact:   xsb-contact@cs.sunysb.edu

** 

** Copyright (C) The Research Foundation of SUNY, 2002-2006

** 

** XSB is free software; you can redistribute it and/or modify it under the

** terms of the GNU Library General Public License as published by the Free

** Software Foundation; either version 2 of the License, or (at your option)

** any later version.

** 

** XSB is distributed in the hope that it will be useful, but WITHOUT ANY

** WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS

** FOR A PARTICULAR PURPOSE.  See the GNU Library General Public License for

** more details.

** 

** You should have received a copy of the GNU Library General Public License

** along with XSB; if not, write to the Free Software Foundation,

** Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

**

*/



/*

** Data structures, function declarations for the driver_manager

*/



#ifdef WIN_NT

#include <windows.h>

#endif



#ifdef WIN_NT

#define XSB_DLL

#endif





#define MAX_CONNECTIONS 25

#define MAX_HANDLES 25

#define MAX_DRIVERS 25

#define MAX_QUERIES 100



#define CONNECT 0 

#define DISCONNECT 1

#define QUERY 2

#define PREPARE 3

#define EXEC_PREPARE 4

#define CLOSE_STMT 5

#define ERROR_MESG 6



#define INT_TYPE 1

#define FLOAT_TYPE 2

#define STRING_TYPE 3

#define TERM_TYPE 4



#define SUCCESS 0

#define FAILURE -1



#define QUERY_BEGIN 0

#define QUERY_RETRIEVE 1



#define QUERY_SIZE 10000

#define ELEMENT_SIZE 1000



#define TERM_CHAR '\255'



// codes returned by bindReturnList

#define RESULT_EMPTY_BUT_REQUESTED 0

#define RESULT_NONEMPTY_OR_NOT_REQUESTED 1

#define TOO_MANY_RETURN_COLS 2

#define INVALID_RETURN_LIST 3

#define TOO_FEW_RETURN_COLS 4



// **** the database value data structures ****



union xsb_value

{

  int* i_val;

  double* f_val;

  char* str_val;

};



struct xsb_data

{

  int type;

  int length;

  union xsb_value* val;

};



// **** the handle data structures ****



struct xsb_connectionHandle

{

  char* handle; //key

  char* server;

  char* user;

  char* database;

  char* password;

  char* dsn;

  char* driver;

};



struct xsb_queryHandle

{

  struct xsb_connectionHandle* connHandle;

  char* handle;      /* key */

  char* query;

  int state;

  int numParams;     /* number of parameters to prepare statement */

  int numResultCols; /* number of columns in the result */

};



// **** the driver data structures ****





struct driverFunction

{

  int functionType;

  union functionPtrs* functionName;     

};



struct driver

{

  char* driver;

  int numberFunctions;

  struct driverFunction** functions;

};



// **** the function ptrs and function declarations ****



union functionPtrs

{

  int (*connectDriver)(struct xsb_connectionHandle*);

  int (*disconnectDriver)(struct xsb_connectionHandle*);

  struct xsb_data** (*queryDriver)(struct xsb_queryHandle*);

  int (*prepareStmtDriver)(struct xsb_queryHandle*);

  struct xsb_data** (*executeStmtDriver)(struct xsb_data**, struct xsb_queryHandle*);

  int (*closeStmtDriver)(struct xsb_queryHandle*);

  char* (*errorMesgDriver)();

};



DllExport int call_conv registerXSBDriver(char* driver, int num);

DllExport int call_conv registerXSBFunction(char* dr, int type, union functionPtrs* func);

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