integral_limits.h

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/******************************************************************************
The MIT License(MIT)
 
Embedded Template Library.
https://github.com/ETLCPP/etl
https://www.etlcpp.com
 
Copyright(c) 2014 John Wellbelove
 
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#ifndef ETL_INTEGRAL_LIMITS_INCLUDED
#define ETL_INTEGRAL_LIMITS_INCLUDED
 
#include "platform.h"
#include "type_traits.h"
 
#include <limits.h>
#include <stddef.h>
 
#include "private/minmax_push.h"
 
//*****************************************************************************
//*****************************************************************************
 
#ifndef LLONG_MAX
  #define LLONG_MAX 9223372036854775807LL
#endif
 
#ifndef LLONG_MIN
  #define LLONG_MIN (-LLONG_MAX - 1LL)
#endif
 
#ifndef ULLONG_MAX
  #define ULLONG_MAX 18446744073709551615ULL
#endif
 
namespace etl
{
  namespace private_integral_limits
  {
    //*****************************************************************************
    //*****************************************************************************
 
    //*********************************
    // signed char
    template <typename T = void>
    struct statics_signed_char
    {
      typedef signed char value_type;
 
      static ETL_CONSTANT signed char min       = SCHAR_MIN;
      static ETL_CONSTANT signed char max       = SCHAR_MAX;
      static ETL_CONSTANT int         bits      = CHAR_BIT;
      static ETL_CONSTANT bool        is_signed = etl::is_signed<signed char>::value;
    };
 
    template <typename T>
    ETL_CONSTANT signed char statics_signed_char<T>::min;
 
    template <typename T>
    ETL_CONSTANT signed char statics_signed_char<T>::max;
 
    template <typename T>
    ETL_CONSTANT int statics_signed_char<T>::bits;
 
    template <typename T>
    ETL_CONSTANT bool statics_signed_char<T>::is_signed;
 
    //***********************************
    // unsigned char
    template <typename T = void>
    struct statics_unsigned_char
    {
      typedef unsigned char value_type;
 
      static ETL_CONSTANT unsigned char min       = 0;
      static ETL_CONSTANT unsigned char max       = UCHAR_MAX;
      static ETL_CONSTANT int           bits      = CHAR_BIT;
      static ETL_CONSTANT bool          is_signed = etl::is_signed<unsigned char>::value;
    };
 
    template <typename T>
    ETL_CONSTANT unsigned char statics_unsigned_char<T>::min;
 
    template <typename T>
    ETL_CONSTANT unsigned char statics_unsigned_char<T>::max;
 
    template <typename T>
    ETL_CONSTANT int statics_unsigned_char<T>::bits;
 
    template <typename T>
    ETL_CONSTANT bool statics_unsigned_char<T>::is_signed;
 
    //***********************************
    // char
    template <typename T = void>
    struct statics_char
    {
      typedef char value_type;
 
      static ETL_CONSTANT char min       = (etl::is_signed<char>::value) ? SCHAR_MIN : 0;
      static ETL_CONSTANT char max       = (etl::is_signed<char>::value) ? SCHAR_MAX : static_cast<char>(UCHAR_MAX);
      static ETL_CONSTANT int  bits      = CHAR_BIT;
      static ETL_CONSTANT bool is_signed = etl::is_signed<char>::value;
    };
 
    template <typename T>
    ETL_CONSTANT char statics_char<T>::min;
 
    template <typename T>
    ETL_CONSTANT char statics_char<T>::max;
 
    template <typename T>
    ETL_CONSTANT int statics_char<T>::bits;
 
    template <typename T>
    ETL_CONSTANT bool statics_char<T>::is_signed;
 
    //***********************************
    // wchar_t
    template <typename T = void>
    struct statics_wchar_t
    {
      typedef wchar_t value_type;
 
      static ETL_CONSTANT wchar_t min       = WCHAR_MIN;
      static ETL_CONSTANT wchar_t max       = WCHAR_MAX;
      static ETL_CONSTANT int     bits      = CHAR_BIT * sizeof(wchar_t);
      static ETL_CONSTANT bool    is_signed = etl::is_signed<wchar_t>::value;
    };
 
    template <typename T>
    ETL_CONSTANT wchar_t statics_wchar_t<T>::min;
 
    template <typename T>
    ETL_CONSTANT wchar_t statics_wchar_t<T>::max;
 
    template <typename T>
    ETL_CONSTANT int statics_wchar_t<T>::bits;
 
    template <typename T>
    ETL_CONSTANT bool statics_wchar_t<T>::is_signed;
 
    //***********************************
    // short
#if defined(ETL_COMPILER_MICROSOFT)
  #pragma warning(push)
  #pragma warning(disable : 4309)
#endif
 
    template <typename T = void>
    struct statics_short
    {
      typedef short value_type;
 
      static ETL_CONSTANT short min       = SHRT_MIN;
      static ETL_CONSTANT short max       = SHRT_MAX;
      static ETL_CONSTANT int   bits      = CHAR_BIT * (sizeof(short) / sizeof(char));
      static ETL_CONSTANT bool  is_signed = etl::is_signed<short>::value;
    };
 
    template <typename T>
    ETL_CONSTANT short statics_short<T>::min;
 
    template <typename T>
    ETL_CONSTANT short statics_short<T>::max;
 
    template <typename T>
    ETL_CONSTANT int statics_short<T>::bits;
 
    template <typename T>
    ETL_CONSTANT bool statics_short<T>::is_signed;
 
#if defined(ETL_COMPILER_MICROSOFT)
  #pragma warning(pop)
#endif
 
    //***********************************
    // unsigned short
    template <typename T = void>
    struct statics_unsigned_short
    {
      typedef unsigned short value_type;
 
      static ETL_CONSTANT unsigned short min       = 0;
      static ETL_CONSTANT unsigned short max       = USHRT_MAX;
      static ETL_CONSTANT int            bits      = CHAR_BIT * (sizeof(unsigned short) / sizeof(char));
      static ETL_CONSTANT bool           is_signed = etl::is_signed<unsigned short>::value;
    };
 
    template <typename T>
    ETL_CONSTANT unsigned short statics_unsigned_short<T>::min;
 
    template <typename T>
    ETL_CONSTANT unsigned short statics_unsigned_short<T>::max;
 
    template <typename T>
    ETL_CONSTANT int statics_unsigned_short<T>::bits;
 
    template <typename T>
    ETL_CONSTANT bool statics_unsigned_short<T>::is_signed;
 
    //***********************************
    // int
    template <typename T = void>
    struct statics_int
    {
      typedef int value_type;
 
      static ETL_CONSTANT int  min       = INT_MIN;
      static ETL_CONSTANT int  max       = INT_MAX;
      static ETL_CONSTANT int  bits      = CHAR_BIT * (sizeof(int) / sizeof(char));
      static ETL_CONSTANT bool is_signed = etl::is_signed<int>::value;
    };
 
    template <typename T>
    ETL_CONSTANT int statics_int<T>::min;
 
    template <typename T>
    ETL_CONSTANT int statics_int<T>::max;
 
    template <typename T>
    ETL_CONSTANT int statics_int<T>::bits;
 
    template <typename T>
    ETL_CONSTANT bool statics_int<T>::is_signed;
 
    //***********************************
    // unsigned int
    template <typename T = void>
    struct statics_unsigned_int
    {
      typedef unsigned int value_type;
 
      static ETL_CONSTANT unsigned int min       = 0;
      static ETL_CONSTANT unsigned int max       = UINT_MAX;
      static ETL_CONSTANT int          bits      = CHAR_BIT * (sizeof(unsigned int) / sizeof(char));
      static ETL_CONSTANT bool         is_signed = etl::is_signed<unsigned int>::value;
    };
 
    template <typename T>
    ETL_CONSTANT unsigned int statics_unsigned_int<T>::min;
 
    template <typename T>
    ETL_CONSTANT unsigned int statics_unsigned_int<T>::max;
 
    template <typename T>
    ETL_CONSTANT int statics_unsigned_int<T>::bits;
 
    template <typename T>
    ETL_CONSTANT bool statics_unsigned_int<T>::is_signed;
 
    //***********************************
    // long
    template <typename T = void>
    struct statics_long
    {
      typedef long value_type;
 
      static ETL_CONSTANT long min       = LONG_MIN;
      static ETL_CONSTANT long max       = LONG_MAX;
      static ETL_CONSTANT int  bits      = CHAR_BIT * (sizeof(long) / sizeof(char));
      static ETL_CONSTANT bool is_signed = etl::is_signed<long>::value;
    };
 
    template <typename T>
    ETL_CONSTANT long statics_long<T>::min;
 
    template <typename T>
    ETL_CONSTANT long statics_long<T>::max;
 
    template <typename T>
    ETL_CONSTANT int statics_long<T>::bits;
 
    template <typename T>
    ETL_CONSTANT bool statics_long<T>::is_signed;
 
    //***********************************
    // unsigned long
    template <typename T = void>
    struct statics_unsigned_long
    {
      typedef unsigned long value_type;
 
      static ETL_CONSTANT unsigned long min       = 0;
      static ETL_CONSTANT unsigned long max       = ULONG_MAX;
      static ETL_CONSTANT int           bits      = CHAR_BIT * (sizeof(unsigned long) / sizeof(char));
      static ETL_CONSTANT bool          is_signed = etl::is_signed<unsigned long>::value;
    };
 
    template <typename T>
    ETL_CONSTANT unsigned long statics_unsigned_long<T>::min;
 
    template <typename T>
    ETL_CONSTANT unsigned long statics_unsigned_long<T>::max;
 
    template <typename T>
    ETL_CONSTANT int statics_unsigned_long<T>::bits;
 
    template <typename T>
    ETL_CONSTANT bool statics_unsigned_long<T>::is_signed;
 
    //***********************************
    // long long
    template <typename T = void>
    struct statics_long_long
    {
      typedef long long value_type;
 
      static ETL_CONSTANT long long min       = LLONG_MIN;
      static ETL_CONSTANT long long max       = LLONG_MAX;
      static ETL_CONSTANT int       bits      = CHAR_BIT * (sizeof(long long) / sizeof(char));
      static ETL_CONSTANT bool      is_signed = etl::is_signed<long long>::value;
    };
 
    template <typename T>
    ETL_CONSTANT long long statics_long_long<T>::min;
 
    template <typename T>
    ETL_CONSTANT long long statics_long_long<T>::max;
 
    template <typename T>
    ETL_CONSTANT int statics_long_long<T>::bits;
 
    template <typename T>
    ETL_CONSTANT bool statics_long_long<T>::is_signed;
 
    //***********************************
    // unsigned long long
    template <typename T = void>
    struct statics_unsigned_long_long
    {
      typedef unsigned long value_type;
 
      static ETL_CONSTANT unsigned long long min       = 0;
      static ETL_CONSTANT unsigned long long max       = ULLONG_MAX;
      static ETL_CONSTANT int                bits      = CHAR_BIT * (sizeof(unsigned long long) / sizeof(char));
      static ETL_CONSTANT bool               is_signed = etl::is_signed<unsigned long long>::value;
    };
 
    template <typename T>
    ETL_CONSTANT unsigned long long statics_unsigned_long_long<T>::min;
 
    template <typename T>
    ETL_CONSTANT unsigned long long statics_unsigned_long_long<T>::max;
 
    template <typename T>
    ETL_CONSTANT int statics_unsigned_long_long<T>::bits;
 
    template <typename T>
    ETL_CONSTANT bool statics_unsigned_long_long<T>::is_signed;
 
#if ETL_HAS_NATIVE_CHAR8_T
    //***********************************
    // char8_t
    template <typename T = void>
    struct statics_char8_t
    {
      typedef char8_t value_type;
 
      static ETL_CONSTANT char8_t min       = static_cast<char8_t>((etl::is_signed<char8_t>::value) ? SCHAR_MIN : 0);
      static ETL_CONSTANT char8_t max       = (etl::is_signed<char8_t>::value) ? static_cast<char8_t>(SCHAR_MAX) : static_cast<char8_t>(UCHAR_MAX);
      static ETL_CONSTANT int     bits      = CHAR_BIT;
      static ETL_CONSTANT bool    is_signed = etl::is_signed<char8_t>::value;
    };
 
    template <typename T>
    ETL_CONSTANT char8_t statics_char8_t<T>::min;
 
    template <typename T>
    ETL_CONSTANT char8_t statics_char8_t<T>::max;
 
    template <typename T>
    ETL_CONSTANT int statics_char8_t<T>::bits;
 
    template <typename T>
    ETL_CONSTANT bool statics_char8_t<T>::is_signed;
#endif
 
#if ETL_HAS_NATIVE_CHAR16_T
    //***********************************
    // char16_t
    template <typename T = void>
    struct statics_char16_t
    {
      typedef char16_t value_type;
 
      static ETL_CONSTANT char16_t min       = 0;
      static ETL_CONSTANT char16_t max       = 0xFFFFU;
      static ETL_CONSTANT int      bits      = 16;
      static ETL_CONSTANT bool     is_signed = false;
    };
 
    template <typename T>
    ETL_CONSTANT char16_t statics_char16_t<T>::min;
 
    template <typename T>
    ETL_CONSTANT char16_t statics_char16_t<T>::max;
 
    template <typename T>
    ETL_CONSTANT int statics_char16_t<T>::bits;
 
    template <typename T>
    ETL_CONSTANT bool statics_char16_t<T>::is_signed;
#endif
 
#if ETL_HAS_NATIVE_CHAR32_T
    //***********************************
    // char32_t
    template <typename T = void>
    struct statics_char32_t
    {
      typedef char32_t value_type;
 
      static ETL_CONSTANT char32_t min       = 0;
      static ETL_CONSTANT char32_t max       = 0xFFFFFFFFU;
      static ETL_CONSTANT int      bits      = 32;
      static ETL_CONSTANT bool     is_signed = false;
    };
 
    template <typename T>
    ETL_CONSTANT char32_t statics_char32_t<T>::min;
 
    template <typename T>
    ETL_CONSTANT char32_t statics_char32_t<T>::max;
 
    template <typename T>
    ETL_CONSTANT int statics_char32_t<T>::bits;
 
    template <typename T>
    ETL_CONSTANT bool statics_char32_t<T>::is_signed;
#endif
 
#if ETL_USING_20BIT_TYPES
    template <typename T = void>
    struct statics___int20
    {
      typedef __int20 value_type;
 
      static ETL_CONSTANT __int20 min       = 0x80000;
      static ETL_CONSTANT __int20 max       = 0x7FFFF;
      static ETL_CONSTANT int     bits      = 20;
      static ETL_CONSTANT bool    is_signed = true;
    };
 
    template <typename T>
    ETL_CONSTANT __int20 statics___int20<T>::min;
 
    template <typename T>
    ETL_CONSTANT __int20 statics___int20<T>::max;
 
    template <typename T>
    ETL_CONSTANT int statics___int20<T>::bits;
 
    template <typename T>
    ETL_CONSTANT bool statics___int20<T>::is_signed;
 
    template <typename T = void>
    struct statics_unsigned___int20
    {
      typedef unsigned __int20 value_type;
 
      static ETL_CONSTANT unsigned __int20 min       = 0;
      static ETL_CONSTANT unsigned __int20 max       = 0xFFFFF;
      static ETL_CONSTANT int              bits      = 20;
      static ETL_CONSTANT bool             is_signed = false;
    };
 
    template <typename T>
    ETL_CONSTANT unsigned __int20 statics_unsigned___int20<T>::min;
 
    template <typename T>
    ETL_CONSTANT unsigned __int20 statics_unsigned___int20<T>::max;
 
    template <typename T>
    ETL_CONSTANT int statics_unsigned___int20<T>::bits;
 
    template <typename T>
    ETL_CONSTANT bool statics_unsigned___int20<T>::is_signed;
#endif
  } // namespace private_integral_limits
 
  //***************************************************************************
  //***************************************************************************
  template <typename T>
  struct integral_limits;
 
  //***************************************************************************
  //***************************************************************************
  template <>
  struct integral_limits<signed char> : public private_integral_limits::statics_signed_char<>
  {
  };
 
  //***************************************************************************
  //***************************************************************************
  template <>
  struct integral_limits<unsigned char> : public private_integral_limits::statics_unsigned_char<>
  {
  };
 
  //***************************************************************************
  //***************************************************************************
 
  template <>
  struct integral_limits<char> : public private_integral_limits::statics_char<>
  {
    typedef char value_type;
  };
 
  //***************************************************************************
  //***************************************************************************
  template <>
  struct integral_limits<short> : public private_integral_limits::statics_short<>
  {
  };
 
  //***************************************************************************
  //***************************************************************************
  template <>
  struct integral_limits<unsigned short> : public private_integral_limits::statics_unsigned_short<>
  {
  };
 
  //***************************************************************************
  //***************************************************************************
  template <>
  struct integral_limits<int> : public private_integral_limits::statics_int<>
  {
  };
 
  //***************************************************************************
  //***************************************************************************
  template <>
  struct integral_limits<unsigned int> : public private_integral_limits::statics_unsigned_int<>
  {
  };
 
  //***************************************************************************
  //***************************************************************************
  template <>
  struct integral_limits<long> : public private_integral_limits::statics_long<>
  {
  };
 
  //***************************************************************************
  //***************************************************************************
  template <>
  struct integral_limits<unsigned long> : public private_integral_limits::statics_unsigned_long<>
  {
  };
 
  //***************************************************************************
  //***************************************************************************
  template <>
  struct integral_limits<long long> : public private_integral_limits::statics_long_long<>
  {
  };
 
  //***************************************************************************
  //***************************************************************************
  template <>
  struct integral_limits<unsigned long long> : public private_integral_limits::statics_unsigned_long_long<>
  {
  };
 
#if ETL_USING_20BIT_TYPES
  //***************************************************************************
  //***************************************************************************
  template <>
  struct integral_limits<__int20> : public private_integral_limits::statics___int20<>
  {
  };
 
  template <>
  struct integral_limits<unsigned __int20> : public private_integral_limits::statics_unsigned___int20<>
  {
  };
#endif
} // namespace etl
 
#include "private/minmax_pop.h"
 
#endif