| 1 | // |
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| 2 | // Lol Engine |
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| 3 | // |
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| 4 | // Copyright: (c) 2010-2011 Sam Hocevar <sam@hocevar.net> |
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| 5 | // This program is free software; you can redistribute it and/or |
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| 6 | // modify it under the terms of the Do What The Fuck You Want To |
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| 7 | // Public License, Version 2, as published by Sam Hocevar. See |
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| 8 | // http://sam.zoy.org/projects/COPYING.WTFPL for more details. |
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| 9 | // |
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| 10 | |
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| 11 | // |
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| 12 | // The Real class |
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| 13 | // -------------- |
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| 14 | // |
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| 15 | |
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| 16 | #if !defined __LOL_REAL_H__ |
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| 17 | #define __LOL_REAL_H__ |
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| 18 | |
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| 19 | #include <stdint.h> |
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| 20 | |
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| 21 | namespace lol |
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| 22 | { |
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| 23 | |
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| 24 | class real |
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| 25 | { |
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| 26 | public: |
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| 27 | inline real() { } |
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| 28 | |
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| 29 | real(float f); |
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| 30 | real(double f); |
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| 31 | real(int i); |
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| 32 | real(unsigned int i); |
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| 33 | |
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| 34 | operator float() const; |
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| 35 | operator double() const; |
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| 36 | operator int() const; |
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| 37 | operator unsigned int() const; |
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| 38 | |
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| 39 | real operator -() const; |
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| 40 | real operator +(real const &x) const; |
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| 41 | real operator -(real const &x) const; |
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| 42 | real operator *(real const &x) const; |
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| 43 | real operator /(real const &x) const; |
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| 44 | real &operator +=(real const &x); |
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| 45 | real &operator -=(real const &x); |
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| 46 | real &operator *=(real const &x); |
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| 47 | real &operator /=(real const &x); |
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| 48 | |
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| 49 | real operator <<(int x) const; |
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| 50 | real operator >>(int x) const; |
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| 51 | real &operator <<=(int x); |
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| 52 | real &operator >>=(int x); |
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| 53 | |
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| 54 | bool operator ==(real const &x) const; |
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| 55 | bool operator !=(real const &x) const; |
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| 56 | bool operator <(real const &x) const; |
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| 57 | bool operator >(real const &x) const; |
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| 58 | bool operator <=(real const &x) const; |
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| 59 | bool operator >=(real const &x) const; |
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| 60 | |
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| 61 | bool operator !() const; |
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| 62 | operator bool() const; |
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| 63 | |
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| 64 | friend real fabs(real const &x); |
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| 65 | |
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| 66 | friend real fres(real const &x); |
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| 67 | friend real sqrt(real const &x); |
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| 68 | friend real log(real const &x); |
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| 69 | friend real exp(real const &x); |
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| 70 | |
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| 71 | friend real sin(real const &x); |
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| 72 | friend real cos(real const &x); |
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| 73 | |
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| 74 | void print(int ndigits = 150) const; |
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| 75 | |
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| 76 | static real const R_E; |
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| 77 | static real const R_LOG2E; |
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| 78 | static real const R_LOG10E; |
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| 79 | static real const R_LN2; |
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| 80 | static real const R_LN10; |
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| 81 | static real const R_PI; |
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| 82 | static real const R_PI_2; |
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| 83 | static real const R_PI_4; |
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| 84 | static real const R_1_PI; |
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| 85 | static real const R_2_PI; |
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| 86 | static real const R_2_SQRTPI; |
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| 87 | static real const R_SQRT2; |
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| 88 | static real const R_SQRT1_2; |
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| 89 | |
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| 90 | private: |
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| 91 | /* XXX: changing this requires tuning real::fres (the number of |
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| 92 | * Newton-Raphson iterations) and real::print (the number of printed |
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| 93 | * digits) */ |
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| 94 | static int const BIGITS = 32; |
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| 95 | |
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| 96 | uint32_t m_size; |
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| 97 | uint32_t m_signexp; |
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| 98 | uint16_t m_mantissa[BIGITS]; |
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| 99 | }; |
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| 100 | |
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| 101 | } /* namespace lol */ |
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| 102 | |
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| 103 | #endif // __LOL_REAL_H__ |
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| 104 | |
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