/* 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 2 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* Author: B. Gough and G. Jungman */ #ifndef __GSL_MODE_H__ #define __GSL_MODE_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 extern inline unsigned int GSL_MODE_PREC(gsl_mode_t mt); extern inline 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__ */

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