lib_mysqludf_skeleton.c

/*
 * Skeleton libary for MySQL.
 * A set of MySQL user defined functions (UDF) to [DESCRIPTION]
 *
 * Copyright (C) [YYYY YOUR NAME <YOU@EXAMPLE.COM>]
 *
 * This library is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 of the License, or (at
 * your option) any later version.
 *
 * This library 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 Lesser
 * General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; if not, write to the Free Software Foundation, Inc.,
 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#include "mysqludf.h"

/* For Windows, define PACKAGE_STRING in the VS project */
#ifndef __WIN__
#include "config.h"
#endif

/* These must be right or mysqld will not find the symbol! */
#ifdef	__cplusplus
extern "C" {
#endif
	DLLEXP int lib_mysqludf_skeleton_info_init(UDF_INIT *initid, UDF_ARGS *args, char *message);
	DLLEXP void lib_mysqludf_skeleton_info_deinit(UDF_INIT *initid);
	/* For functions that return STRING or DECIMAL */ 
	DLLEXP char *lib_mysqludf_skeleton_info(UDF_INIT *initid, UDF_ARGS *args, char *result, unsigned long *length, char *is_null, char *error);

	/* For functions that return REAL */
	/* DLLEXP double lib_mysqludf_skeleton_info(UDF_INIT *initid, UDF_ARGS *args, char *is_null, char *error); */
	/* For functions that return INTEGER */
	/* DLLEXP longlong lib_mysqludf_skeleton_info(UDF_INIT *initid, UDF_ARGS *args, char *is_null, char *error); */

	/* If you are doing an Aggregate function you'll need these too */
	/* DLLEXP void lib_mysqludf_skeleton_info_clear( UDF_INIT* initid, char* is_null, char* is_error ); */
	/* DLLEXP void lib_mysqludf_skeleton_info_add( UDF_INIT* initid, UDF_ARGS* args, char* is_null, char* is_error ); */

#ifdef	__cplusplus
}
#endif


/*
 * Output the library version.
 * lib_mysqludf_skeleton_info()
 */

int lib_mysqludf_skeleton_info_init(UDF_INIT *initid, UDF_ARGS *args, char *message)
{
	return 0;
}

void lib_mysqludf_skeleton_info_deinit(UDF_INIT *initid)
{
}

/* For functions that return REAL */
/* double lib_mysqludf_skeleton_info(UDF_INIT *initid, UDF_ARGS *args, char *is_null, char *error) */
/* For functions that return INTEGER */
/* longlong lib_mysqludf_skeleton_info(UDF_INIT *initid, UDF_ARGS *args, char *is_null, char *error) */

/* For functions that return STRING or DECIMAL */ 
char* lib_mysqludf_skeleton_info(UDF_INIT *initid, UDF_ARGS *args, char* result, unsigned long* length,	char *is_null, char *error)
{
	strcpy(result, PACKAGE_STRING);
	*length = strlen(PACKAGE_STRING);
	return result;
}