72 lines
1.9 KiB
C
72 lines
1.9 KiB
C
/***************************************************************************
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gbx_math.h
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(c) 2000-2017 Benoît Minisini <g4mba5@gmail.com>
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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 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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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,
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MA 02110-1301, USA.
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***************************************************************************/
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#ifndef __GBX_MATH_H
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#define __GBX_MATH_H
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#include "config.h"
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#ifdef OS_BSD
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#undef HAVE_EXP10
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#endif
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#ifndef __GBX_MATH_C
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extern const double MATH_pow10_double[];
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#endif
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void MATH_init(void);
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int lsgn(int x);
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int llsgn(int64_t x);
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//int64_t llabs(int64_t x);
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double frac(double x);
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int fsgn(double x);
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float fixf(float x);
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double fix(double x);
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double frexp10(double x, int *exp);
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#define pow10(_n) (((_n) >= 0 && (_n) <= 9) ? MATH_pow10_double[_n] : (((_n) < 0 && (_n) >= -9) ? (1.0 / MATH_pow10_double[-(_n)]) : exp10(_n)))
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//#define mulpow10(_v, _n) (((_n) >= 0 && (_n) <= 9) ? ((_v) * MATH_pow10_double[_n]) : (((_n) < 0 && (_n) >= -9) ? ((_v) / MATH_pow10[-(_n)]) : ((_v) * exp10(_n))))
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uint64_t pow10_uint64_p(int n);
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void randomize(bool set, uint seed);
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double rnd(void);
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#define deg(_x) ((_x) * 180 / M_PI)
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#define rad(_x) ((_x) * M_PI / 180)
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#ifndef HAVE_EXP10
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double exp10(double x);
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#endif
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#ifndef HAVE_LOG2
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double log2(double x);
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#endif
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#ifndef HAVE_EXP2
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double exp2(double x);
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#endif
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#endif
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