#include <grass/dbmi.h>
#include "odbc.h"
#include "globals.h"
#include "proto.h"

int open_connection ()
{
    SQLRETURN   ret;  

    /* Allocate Environment handle and register version */
    ret = SQLAllocHandle(SQL_HANDLE_ENV,SQL_NULL_HANDLE, &ODenvi);
    if (( ret != SQL_SUCCESS) && ( ret != SQL_SUCCESS_WITH_INFO))
    {
	report_error("SQLAllocHandle()");
	return DB_FAILED;
    }  

    ret = SQLSetEnvAttr(ODenvi, SQL_ATTR_ODBC_VERSION, (void*)SQL_OV_ODBC3, 0);
    if ((ret != SQL_SUCCESS) && ( ret != SQL_SUCCESS_WITH_INFO))
    {  
    	report_error("SQLSetEnvAttr()");
	SQLFreeHandle(SQL_HANDLE_ENV, ODenvi); 
	return DB_FAILED;
    }  

    /* Allocate connection handle */
    ret = SQLAllocHandle(SQL_HANDLE_DBC, ODenvi, &ODconn);
    if (( ret != SQL_SUCCESS) && ( ret != SQL_SUCCESS_WITH_INFO))
    {
	report_error("SQLAllocHandle()");
	SQLFreeHandle(SQL_HANDLE_ENV, ODenvi);
	return DB_FAILED;
    }  

    /* Set timeout */
    SQLSetConnectAttr( ODconn, SQL_LOGIN_TIMEOUT, (SQLPOINTER *)5, 0);

    return DB_OK;
}

int close_connection ()
{
    SQLFreeHandle(SQL_HANDLE_DBC, ODconn);
    SQLFreeHandle(SQL_HANDLE_ENV, ODenvi);     
    return DB_OK;
}