MyFirstUDRKit/src/MyFirstUDRKit.cpp

/*
 *  The contents of this file are subject to the Initial
 *  Developer's Public License Version 1.0 (the "License");
 *  you may not use this file except in compliance with the
 *  License. You may obtain a copy of the License at
 *  http://www.ibphoenix.com/main.nfs?a=ibphoenix&page=ibp_idpl.
 *
 *  Software distributed under the License is distributed AS IS,
 *  WITHOUT WARRANTY OF ANY KIND, either express or implied.
 *  See the License for the specific language governing rights
 *  and limitations under the License.
 *
 *  The Original Code was created by Adriano dos Santos Fernandes
 *  for the Firebird Open Source RDBMS project.
 *
 *  Copyright (c) 2008 Adriano dos Santos Fernandes <adrianosf@gmail.com>
 *  and all contributors signed below.
 *
 *  All Rights Reserved.
 *  Contributor(s): ______________________________________.
 *
 *	Paul Reeves, 2023
 *
 */


#define FB_UDR_STATUS_TYPE ::Firebird::ThrowStatusWrapper


#include <ibase.h>
#include <firebird/UdrCppEngine.h>

#include <cassert>
#include <stdio.h>
#include <stdlib.h>

#ifdef HAVE_MATH_H
#include <math.h>
#endif

#ifdef HAVE_STRING_H
#include <string.h>
#endif

#ifdef TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# ifdef HAVE_SYS_TIME_H
#  include <sys/time.h>
# else
#  include <time.h>
# endif
#endif

#ifdef HAVE_SYS_TIMEB_H
# include <sys/timeb.h>
#endif

#ifdef HAVE_LOCALE_H
#include <locale.h>
#endif

#include <limits>

using namespace Firebird;

/*** DDL
create function flagged (
    n1 integer,
    n2 integer
) returns integer
    external name 'my_first_udr_kit!MFK_flagged'
    engine udr;
***/
FB_UDR_BEGIN_FUNCTION(MFK_flagged)
	FB_UDR_MESSAGE(InMessage,
		(FB_INTEGER, flags)
		(FB_INTEGER, flag)
	);

	FB_UDR_MESSAGE(OutMessage,
		(FB_INTEGER, result)
	);

	FB_UDR_EXECUTE_FUNCTION
	{
// Original code
//  if ( flags == NULL ) {
//    return 0;
//  }
		if ( in->flagsNull ) {
			out->resultNull = FB_TRUE;
			out->result = 0;
		}
		else
		{
			out->resultNull = FB_FALSE;
// Original code
//		ISC_UINT64 i = ( 1ULL << *flag );
//		return ( *flags & i ) ? 1 : 0;
			ISC_UINT64 i = ( 1ULL << in->flag );
			out->result = ( in->flags & i ) ? 1 : 0;
		}
	}
FB_UDR_END_FUNCTION