/* gsl_mode.h

 * 

 * Copyright (C) 1996, 1997, 1998, 1999, 2000, 2004 Gerard Jungman

 * 

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 3 of the License, or (at

 * your option) any later version.

 * 

 * This program 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

 * General Public License for more details.

 * 

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

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

 */

/* Author:  B. Gough and G. Jungman */

#ifndef __GSL_MODE_H__

#define __GSL_MODE_H__

#include <gsl/gsl_inline.h>

#undef __BEGIN_DECLS

#undef __END_DECLS

#ifdef __cplusplus

# define __BEGIN_DECLS extern "C" {

# define __END_DECLS }

#else

# define __BEGIN_DECLS /* empty */

# define __END_DECLS /* empty */

#endif

__BEGIN_DECLS

/* Some functions can take a mode argument. This

 * is a rough method to do things like control

 * the precision of the algorithm. This mainly

 * occurs in special functions, but we figured

 * it was ok to have a general facility.

 *

 * The mode type is 32-bit field. Most of

 * the fields are currently unused. Users

 * '|' various predefined constants to get

 * a desired mode.

 */

typedef unsigned int gsl_mode_t;

/* Here are the predefined constants.

 * Note that the precision constants

 * are special because they are used

 * to index arrays, so do not change

 * them. The precision information is

 * in the low order 3 bits of gsl_mode_t

 * (the third bit is currently unused).

 */

/* Note that "0" is double precision,

 * so that you get that by default if

 * you forget a flag.

 */

#define GSL_PREC_DOUBLE  0

#define GSL_PREC_SINGLE  1

#define GSL_PREC_APPROX  2

#ifdef HAVE_INLINE

INLINE_FUN unsigned int GSL_MODE_PREC(gsl_mode_t mt);

INLINE_FUN unsigned int

GSL_MODE_PREC(gsl_mode_t mt)

{ return  (mt & (unsigned int)7); }

#else  /* HAVE_INLINE */

#define GSL_MODE_PREC(mt) ((mt) & (unsigned int)7)

#endif /* HAVE_INLINE */

/* Here are some predefined generic modes.

 */

#define GSL_MODE_DEFAULT  0

__END_DECLS

#endif /* __GSL_MODE_H__ */