/src/gdal/muparser/include/muParserTemplateMagic.h

Source
/*

   _____  __ _____________ _______  ______ ___________
  /     \|  |  \____ \__  \\_  __ \/  ___// __ \_  __ \
   |  Y Y  \  |  /  |_> > __ \|  | \/\___ \\  ___/|  | \/
   |__|_|  /____/|   __(____  /__|  /____  >\___  >__|
     \/      |__|       \/           \/     \/
   Copyright (C) 2004 - 2022 Ingo Berg

  Redistribution and use in source and binary forms, with or without modification, are permitted
  provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice, this list of
    conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright notice, this list of
    conditions and the following disclaimer in the documentation and/or other materials provided
    with the distribution.

  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
  IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
  FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
  IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#ifndef MU_PARSER_TEMPLATE_MAGIC_H
#define MU_PARSER_TEMPLATE_MAGIC_H

#include <algorithm>
#include <random>
#include <cmath>
#include "muParserError.h"


namespace mu
{
  //-----------------------------------------------------------------------------------------------
  //
  // Compile time type detection
  //
  //-----------------------------------------------------------------------------------------------

  /** \brief A class singling out integer types at compile time using
         template meta programming.
  */
  template<typename T>
  struct TypeInfo
  {
    static bool IsInteger() { return false; }
  };

  template<>
  struct TypeInfo<char>
  {
    static bool IsInteger() { return true; }
  };

  template<>
  struct TypeInfo<short>
  {
    static bool IsInteger() { return true; }
  };

  template<>
  struct TypeInfo<int>
  {
    static bool IsInteger() { return true; }
  };

  template<>
  struct TypeInfo<long>
  {
    static bool IsInteger() { return true; }
  };

  template<>
  struct TypeInfo<unsigned char>
  {
    static bool IsInteger() { return true; }
  };

  template<>
  struct TypeInfo<unsigned short>
  {
    static bool IsInteger() { return true; }
  };

  template<>
  struct TypeInfo<unsigned int>
  {
    static bool IsInteger() { return true; }
  };

  template<>
  struct TypeInfo<unsigned long>
  {
    static bool IsInteger() { return true; }
  };


  //-----------------------------------------------------------------------------------------------
  //
  // Standard math functions with dummy overload for integer types
  //
  //-----------------------------------------------------------------------------------------------

  /** \brief A template class for providing wrappers for essential math functions.

    This template is spezialized for several types in order to provide a unified interface
    for parser internal math function calls regardless of the data type.
  */
  template<typename T>
  struct MathImpl
  {
    static T Sin(T v) { return sin(v); }
    static T Cos(T v) { return cos(v); }
    static T Tan(T v) { return tan(v); }
    static T ASin(T v) { return asin(v); }
    static T ACos(T v) { return acos(v); }
    static T ATan(T v) { return atan(v); }
    static T ATan2(T v1, T v2) { return atan2(v1, v2); }
    static T Sinh(T v) { return sinh(v); }
    static T Cosh(T v) { return cosh(v); }
    static T Tanh(T v) { return tanh(v); }
    static T ASinh(T v) { return log(v + sqrt(v * v + 1)); }
    static T ACosh(T v) { return log(v + sqrt(v * v - 1)); }
    static T ATanh(T v) { return ((T)0.5 * log((1 + v) / (1 - v))); }
    static T Log(T v) { return log(v); }
    static T Log2(T v) { return log(v) / log((T)2); } // Logarithm base 2
    static T Log10(T v) { return log10(v); }         // Logarithm base 10
    static T Exp(T v) { return exp(v); }
    static T Abs(T v) { return (v >= 0) ? v : -v; }
    static T Sqrt(T v) { return sqrt(v); }
    static T Rint(T v) { return floor(v + (T)0.5); }
    static T Sign(T v) { return (T)((v < 0) ? -1 : (v > 0) ? 1 : 0); }
    static T Pow(T v1, T v2) { return std::pow(v1, v2); }
    static T Rnd()
    {
      static std::random_device rd;  
      static std::mt19937 gen(rd()); 
      static std::uniform_real_distribution<T> dis(0.0, 1.0); // Range [0, 1)

      return dis(gen);
    }

    static T UnaryMinus(T v) { return -v; }
    static T UnaryPlus(T v) { return v; }

    static T Sum(const T *a_afArg, int a_iArgc)
    {
      if (!a_iArgc)
        throw ParserError(_T("too few arguments for function sum."));

      T fRes = 0;
      for (int i = 0; i < a_iArgc; ++i) fRes += a_afArg[i];
      return fRes;
    }

    static T Avg(const T *a_afArg, int a_iArgc)
    {
      if (!a_iArgc)
        throw ParserError(_T("too few arguments for function avg."));

      T fRes = 0;
      for (int i = 0; i < a_iArgc; ++i) fRes += a_afArg[i];
      return fRes / (T)a_iArgc;
    }

    static T Min(const T *a_afArg, int a_iArgc)
    {
      if (!a_iArgc)
        throw ParserError(_T("too few arguments for function min."));

      T fRes = a_afArg[0];
      for (int i = 0; i < a_iArgc; ++i)
        fRes = std::min(fRes, a_afArg[i]);

      return fRes;
    }

    static T Max(const T *a_afArg, int a_iArgc)
    {
      if (!a_iArgc)
        throw ParserError(_T("too few arguments for function max."));

      T fRes = a_afArg[0];
      for (int i = 0; i < a_iArgc; ++i) fRes = std::max(fRes, a_afArg[i]);

      return fRes;
    }


#if defined (__GNUG__)
    // Bei zu genauer definition von pi kann die Berechnung von
    // sin(pi*a) mit a=1 10 x langsamer sein! 
    static constexpr T CONST_PI = (T)3.141592653589;
#else
    static constexpr T CONST_PI = (T)3.141592653589793238462643;
#endif

    static constexpr T CONST_E = (T)2.718281828459045235360287;
  };
}

#endif

Coverage Report

Created: 2025-12-03 08:24

Line	Count	Source
1		/*
2
3		_____ __ _____________ _______ ______ ___________
4		/ \\| \| \____ \__ \\_ __ \/ ___// __ \_ __ \
5		\| Y Y \ \| / \|_> > __ \\| \| \/\___ \\ ___/\| \| \/
6		\|__\|_\| /____/\| __(____ /__\| /____ >\___ >__\|
7		\/ \|__\| \/ \/ \/
8		Copyright (C) 2004 - 2022 Ingo Berg
9
10		Redistribution and use in source and binary forms, with or without modification, are permitted
11		provided that the following conditions are met:
12
13		* Redistributions of source code must retain the above copyright notice, this list of
14		conditions and the following disclaimer.
15		* Redistributions in binary form must reproduce the above copyright notice, this list of
16		conditions and the following disclaimer in the documentation and/or other materials provided
17		with the distribution.
18
19		THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
20		IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
21		FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
22		CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23		DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24		DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
25		IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
26		OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27		*/
28
29		#ifndef MU_PARSER_TEMPLATE_MAGIC_H
30		#define MU_PARSER_TEMPLATE_MAGIC_H
31
32		#include <algorithm>
33		#include <random>
34		#include <cmath>
35		#include "muParserError.h"
36
37
38		namespace mu
39		{
40		//-----------------------------------------------------------------------------------------------
41		//
42		// Compile time type detection
43		//
44		//-----------------------------------------------------------------------------------------------
45
46		/** \brief A class singling out integer types at compile time using
47		template meta programming.
48		*/
49		template<typename T>
50		struct TypeInfo
51		{
52	0	static bool IsInteger() { return false; }
53		};
54
55		template<>
56		struct TypeInfo<char>
57		{
58	0	static bool IsInteger() { return true; }
59		};
60
61		template<>
62		struct TypeInfo<short>
63		{
64	0	static bool IsInteger() { return true; }
65		};
66
67		template<>
68		struct TypeInfo<int>
69		{
70	0	static bool IsInteger() { return true; }
71		};
72
73		template<>
74		struct TypeInfo<long>
75		{
76	0	static bool IsInteger() { return true; }
77		};
78
79		template<>
80		struct TypeInfo<unsigned char>
81		{
82	0	static bool IsInteger() { return true; }
83		};
84
85		template<>
86		struct TypeInfo<unsigned short>
87		{
88	0	static bool IsInteger() { return true; }
89		};
90
91		template<>
92		struct TypeInfo<unsigned int>
93		{
94	0	static bool IsInteger() { return true; }
95		};
96
97		template<>
98		struct TypeInfo<unsigned long>
99		{
100	0	static bool IsInteger() { return true; }
101		};
102
103
104		//-----------------------------------------------------------------------------------------------
105		//
106		// Standard math functions with dummy overload for integer types
107		//
108		//-----------------------------------------------------------------------------------------------
109
110		/** \brief A template class for providing wrappers for essential math functions.
111
112		This template is spezialized for several types in order to provide a unified interface
113		for parser internal math function calls regardless of the data type.
114		*/
115		template<typename T>
116		struct MathImpl
117		{
118	0	static T Sin(T v) { return sin(v); }
119	0	static T Cos(T v) { return cos(v); }
120	0	static T Tan(T v) { return tan(v); }
121	0	static T ASin(T v) { return asin(v); }
122	0	static T ACos(T v) { return acos(v); }
123	0	static T ATan(T v) { return atan(v); }
124	0	static T ATan2(T v1, T v2) { return atan2(v1, v2); }
125	0	static T Sinh(T v) { return sinh(v); }
126	0	static T Cosh(T v) { return cosh(v); }
127	0	static T Tanh(T v) { return tanh(v); }
128	0	static T ASinh(T v) { return log(v + sqrt(v * v + 1)); }
129	0	static T ACosh(T v) { return log(v + sqrt(v * v - 1)); }
130	0	static T ATanh(T v) { return ((T)0.5 * log((1 + v) / (1 - v))); }
131	0	static T Log(T v) { return log(v); }
132	0	static T Log2(T v) { return log(v) / log((T)2); } // Logarithm base 2
133	0	static T Log10(T v) { return log10(v); } // Logarithm base 10
134	0	static T Exp(T v) { return exp(v); }
135	0	static T Abs(T v) { return (v >= 0) ? v : -v; }
136	0	static T Sqrt(T v) { return sqrt(v); }
137	0	static T Rint(T v) { return floor(v + (T)0.5); }
138	0	static T Sign(T v) { return (T)((v < 0) ? -1 : (v > 0) ? 1 : 0); }
139	0	static T Pow(T v1, T v2) { return std::pow(v1, v2); }
140		static T Rnd()
141	0	{
142	0	static std::random_device rd;
143	0	static std::mt19937 gen(rd());
144	0	static std::uniform_real_distribution<T> dis(0.0, 1.0); // Range [0, 1)
145
146	0	return dis(gen);
147	0	}
148
149	0	static T UnaryMinus(T v) { return -v; }
150	0	static T UnaryPlus(T v) { return v; }
151
152		static T Sum(const T *a_afArg, int a_iArgc)
153	0	{
154	0	if (!a_iArgc)
155	0	throw ParserError(_T("too few arguments for function sum."));
156
157	0	T fRes = 0;
158	0	for (int i = 0; i < a_iArgc; ++i) fRes += a_afArg[i];
159	0	return fRes;
160	0	}
161
162		static T Avg(const T *a_afArg, int a_iArgc)
163	0	{
164	0	if (!a_iArgc)
165	0	throw ParserError(_T("too few arguments for function avg."));
166
167	0	T fRes = 0;
168	0	for (int i = 0; i < a_iArgc; ++i) fRes += a_afArg[i];
169	0	return fRes / (T)a_iArgc;
170	0	}
171
172		static T Min(const T *a_afArg, int a_iArgc)
173	0	{
174	0	if (!a_iArgc)
175	0	throw ParserError(_T("too few arguments for function min."));
176
177	0	T fRes = a_afArg[0];
178	0	for (int i = 0; i < a_iArgc; ++i)
179	0	fRes = std::min(fRes, a_afArg[i]);
180
181	0	return fRes;
182	0	}
183
184		static T Max(const T *a_afArg, int a_iArgc)
185	0	{
186	0	if (!a_iArgc)
187	0	throw ParserError(_T("too few arguments for function max."));
188
189	0	T fRes = a_afArg[0];
190	0	for (int i = 0; i < a_iArgc; ++i) fRes = std::max(fRes, a_afArg[i]);
191
192	0	return fRes;
193	0	}
194
195
196		#if defined (__GNUG__)
197		// Bei zu genauer definition von pi kann die Berechnung von
198		// sin(pi*a) mit a=1 10 x langsamer sein!
199		static constexpr T CONST_PI = (T)3.141592653589;
200		#else
201		static constexpr T CONST_PI = (T)3.141592653589793238462643;
202		#endif
203
204		static constexpr T CONST_E = (T)2.718281828459045235360287;
205		};
206		}
207
208		#endif