114 lines
3 KiB
C
114 lines
3 KiB
C
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#ifndef MU_PARSER_TEMPLATE_MAGIC_H
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#define MU_PARSER_TEMPLATE_MAGIC_H
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#include <cmath>
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#include "muParserError.h"
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namespace mu
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{
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//-----------------------------------------------------------------------------------------------
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//
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// Compile time type detection
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//
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//-----------------------------------------------------------------------------------------------
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/** \brief A class singling out integer types at compile time using
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template meta programming.
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*/
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template<typename T>
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struct TypeInfo
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{
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static bool IsInteger() { return false; }
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};
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template<>
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struct TypeInfo<char>
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{
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static bool IsInteger() { return true; }
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};
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template<>
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struct TypeInfo<short>
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{
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static bool IsInteger() { return true; }
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};
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template<>
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struct TypeInfo<int>
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{
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static bool IsInteger() { return true; }
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};
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template<>
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struct TypeInfo<long>
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{
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static bool IsInteger() { return true; }
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};
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template<>
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struct TypeInfo<unsigned char>
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{
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static bool IsInteger() { return true; }
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};
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template<>
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struct TypeInfo<unsigned short>
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{
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static bool IsInteger() { return true; }
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};
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template<>
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struct TypeInfo<unsigned int>
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{
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static bool IsInteger() { return true; }
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};
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template<>
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struct TypeInfo<unsigned long>
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{
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static bool IsInteger() { return true; }
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};
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//-----------------------------------------------------------------------------------------------
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//
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// Standard math functions with dummy overload for integer types
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//
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//-----------------------------------------------------------------------------------------------
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/** \brief A template class for providing wrappers for essential math functions.
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This template is spezialized for several types in order to provide a unified interface
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for parser internal math function calls regardless of the data type.
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*/
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template<typename T>
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struct MathImpl
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{
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static T Sin(T v) { return sin(v); }
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static T Cos(T v) { return cos(v); }
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static T Tan(T v) { return tan(v); }
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static T ASin(T v) { return asin(v); }
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static T ACos(T v) { return acos(v); }
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static T ATan(T v) { return atan(v); }
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static T ATan2(T v1, T v2) { return atan2(v1, v2); }
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static T Sinh(T v) { return sinh(v); }
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static T Cosh(T v) { return cosh(v); }
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static T Tanh(T v) { return tanh(v); }
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static T ASinh(T v) { return log(v + sqrt(v * v + 1)); }
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static T ACosh(T v) { return log(v + sqrt(v * v - 1)); }
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static T ATanh(T v) { return ((T)0.5 * log((1 + v) / (1 - v))); }
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static T Log(T v) { return log(v); }
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static T Log2(T v) { return log(v)/log((T)2); } // Logarithm base 2
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static T Log10(T v) { return log10(v); } // Logarithm base 10
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static T Exp(T v) { return exp(v); }
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static T Abs(T v) { return (v>=0) ? v : -v; }
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static T Sqrt(T v) { return sqrt(v); }
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static T Rint(T v) { return floor(v + (T)0.5); }
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static T Sign(T v) { return (T)((v<0) ? -1 : (v>0) ? 1 : 0); }
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static T Pow(T v1, T v2) { return std::pow(v1, v2); }
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};
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}
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#endif
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