Janosch
66 lines
1.7 KiB
C
66 lines
1.7 KiB
C
/*
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* This file is part of the libopeninv project.
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*
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* Copyright (C) 2011 Johannes Huebner <dev@johanneshuebner.com>
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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
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* (at 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,
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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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*
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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, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef MY_FP_H_INCLUDED
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#define MY_FP_H_INCLUDED
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#include <stdint.h>
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#define FRAC_DIGITS 5
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#ifndef CST_DIGITS
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#define CST_DIGITS FRAC_DIGITS
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#endif
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#define FRAC_FAC (1 << CST_DIGITS)
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#define CST_CONVERT(a) ((a) << (CST_DIGITS - FRAC_DIGITS))
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#define CST_ICONVERT(a) ((a) >> (CST_DIGITS - FRAC_DIGITS))
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#define UTOA_FRACDEC 100
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#define FP_DECIMALS 2
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#define FP_TOFLOAT(a) (((float)a) / FRAC_FAC)
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#define FP_FROMINT(a) ((s32fp)((a) << CST_DIGITS))
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#define FP_TOINT(a) ((s32fp)((a) >> CST_DIGITS))
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#define FP_FROMFLT(a) ((s32fp)((a) * FRAC_FAC))
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#define FP_MUL(a, b) (((a) * (b)) >> CST_DIGITS)
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#define FP_DIV(a, b) (((a) << CST_DIGITS) / (b))
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typedef uint32_t u32fp;
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typedef int32_t s32fp;
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typedef int16_t s16fp;
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typedef uint16_t u16fp;
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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char* fp_itoa(char * buf, s32fp a);
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s32fp fp_atoi(const char *str, int fracDigits);
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u32fp fp_sqrt(u32fp rad);
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s32fp fp_ln(unsigned int x);
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#ifdef __cplusplus
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}
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#endif
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#endif
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