89 lines
2.3 KiB
C
89 lines
2.3 KiB
C
/* gsl_mode.h
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*
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* Copyright (C) 1996, 1997, 1998, 1999, 2000, 2004 Gerard Jungman
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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/* Author: B. Gough and G. Jungman */
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#ifndef __GSL_MODE_H__
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#define __GSL_MODE_H__
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#include <gsl/gsl_inline.h>
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#undef __BEGIN_DECLS
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#undef __END_DECLS
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#ifdef __cplusplus
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# define __BEGIN_DECLS extern "C" {
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# define __END_DECLS }
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#else
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# define __BEGIN_DECLS /* empty */
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# define __END_DECLS /* empty */
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#endif
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__BEGIN_DECLS
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/* Some functions can take a mode argument. This
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* is a rough method to do things like control
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* the precision of the algorithm. This mainly
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* occurs in special functions, but we figured
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* it was ok to have a general facility.
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*
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* The mode type is 32-bit field. Most of
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* the fields are currently unused. Users
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* '|' various predefined constants to get
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* a desired mode.
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*/
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typedef unsigned int gsl_mode_t;
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/* Here are the predefined constants.
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* Note that the precision constants
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* are special because they are used
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* to index arrays, so do not change
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* them. The precision information is
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* in the low order 3 bits of gsl_mode_t
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* (the third bit is currently unused).
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*/
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/* Note that "0" is double precision,
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* so that you get that by default if
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* you forget a flag.
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*/
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#define GSL_PREC_DOUBLE 0
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#define GSL_PREC_SINGLE 1
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#define GSL_PREC_APPROX 2
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#ifdef HAVE_INLINE
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INLINE_FUN unsigned int GSL_MODE_PREC(gsl_mode_t mt);
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INLINE_FUN unsigned int
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GSL_MODE_PREC(gsl_mode_t mt)
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{ return (mt & (unsigned int)7); }
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#else /* HAVE_INLINE */
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#define GSL_MODE_PREC(mt) ((mt) & (unsigned int)7)
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#endif /* HAVE_INLINE */
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/* Here are some predefined generic modes.
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*/
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#define GSL_MODE_DEFAULT 0
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__END_DECLS
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#endif /* __GSL_MODE_H__ */
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