Luigi Capogrosso
132 lines
3.0 KiB
C
132 lines
3.0 KiB
C
/// MentOS, The Mentoring Operating system project
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/// @file math.h
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/// @brief
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/// @copyright (c) 2019 This file is distributed under the MIT License.
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/// See LICENSE.md for details.
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#pragma once
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/// @brief The absolute value.
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#define abs(a) (((a) < 0) ? -(a) : (a))
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/// @brief The max of the two values.
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#define max(a, b) (((a) > (b)) ? (a) : (b))
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/// @brief The min of the two values.
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#define min(a, b) (((a) < (b)) ? (a) : (b))
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/// @brief The sign the the passed value.
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#define sign(x) ((x < 0) ? -1 : ((x > 0) ? 1 : 0))
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/// @brief Returns a rounded up, away from zero, to the nearest multiple of b.
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#define ceil(NUMBER, BASE) (((NUMBER) + (BASE)-1) & ~((BASE)-1))
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/// @brief e
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#define M_E 2.7182818284590452354
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/// @brief log_2 e
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#define M_LOG2E 1.4426950408889634074
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/// @brief log_10 e
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#define M_LOG10E 0.43429448190325182765
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/// @brief log_e 2
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#define M_LN2 0.69314718055994530942
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/// @brief log_e 10
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#define M_LN10 2.30258509299404568402
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/// @brief pi
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#define M_PI 3.14159265358979323846
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/// @brief pi / 2
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#define M_PI_2 1.57079632679489661923
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/// @brief pi / 4
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#define M_PI_4 0.78539816339744830962
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/// @brief 1 / pi
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#define M_1_PI 0.31830988618379067154
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/// @brief 2 / pi
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#define M_2_PI 0.63661977236758134308
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/// @brief 2 / sqrt(pi)
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#define M_2_SQRTPI 1.12837916709551257390
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/// @brief sqrt(2)
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#define M_SQRT2 1.41421356237309504880
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/// @brief 1 / sqrt(2)
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#define M_SQRT1_2 0.70710678118654752440
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// TODO: doxygen comment.
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/// @brief
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/// @param x
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/// @result
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double round(double x);
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// TODO: doxygen comment.
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/// @brief
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/// @param x
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/// @result
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double floor(double x);
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/// @brief Power function.
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/// @param x First number.
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/// @param y Second number.
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/// @result Power between number x and y.
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double pow(double x, double y);
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// TODO: doxygen comment.
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/// @brief
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/// @param base
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/// @param value
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/// @result
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long find_nearest_pow_greater(double base, double value);
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/// @brief Exponential function.
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/// @param x Value of the exponent.
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double exp(double x);
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// TODO: doxygen comment.
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/// @brief
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/// @param x
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/// @result
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double fabs(double x);
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/// @brief Square root function.
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/// @param x Topic of the square root.
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double sqrt(double x);
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// TODO: doxygen comment.
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/// @brief
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/// @param x
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/// @result
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int isinf(double x);
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// TODO: doxygen comment.
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/// @brief
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/// @param x
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/// @result
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int isnan(double x);
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/// @brief Logarithm function in base 10.
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/// @param x Topic of the logarithm function.
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double log10(double x);
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/// @brief Natural logarithm function.
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/// @param x Topic of the logarithm function.
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double ln(double x);
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/// @brief Logarithm function in base x.
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/// @brief x Base of the logarithm.
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/// @param y Topic of the logarithm function.
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double logx(double x, double y);
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/// @brief Breaks x into an integral and a fractional part.
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/// The integer part is stored in the object pointed by intpart, and the
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/// fractional part is returned by the function. Both parts have the same
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/// sign as x.
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double modf(double x, double *intpart);
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