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numeric_limits.h
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1587 lines (1235 loc) · 58.7 KB
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///////////////////////////////////////////////////////////////////////////////
// Copyright (c) Electronic Arts Inc. All rights reserved.
///////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
// We support eastl::numeric_limits for the following types. Sized types such
// as int32_t are covered by these basic types, with the exception of int128_t.
//
// bool
// char (distinct from signed and unsigned char)
// unsigned char,
// signed char,
// wchar_t
// char16_t (when char16_t is a distict type)
// char32_t (when char32_t is a distinct type)
// unsigned short,
// signed short
// unsigned int
// signed int
// unsigned long
// signed long
// signed long long
// unsigned long long
// uint128_t (when supported natively by the compiler)
// int128_t (when supported natively by the compiler)
// float
// double
// long double
///////////////////////////////////////////////////////////////////////////////
#ifndef EASTL_NUMERIC_LIMITS_H
#define EASTL_NUMERIC_LIMITS_H
#include <EASTL/internal/config.h>
#include <EASTL/type_traits.h>
#include <limits.h> // C limits.h header
#include <float.h>
#if defined(_CPPLIB_VER) // Dinkumware.
#include <ymath.h>
#endif
#if defined(EA_PRAGMA_ONCE_SUPPORTED)
#pragma once // Some compilers (e.g. VC++) benefit significantly from using this. We've measured 3-4% build speed improvements in apps as a result.
#endif
// Disable Warnings:
// 4310 - cast truncates constant value
// 4296 - expression is always false
EA_DISABLE_VC_WARNING(4310 4296)
///////////////////////////////////////////////////////////////////////////////
// min/max workaround
//
// MSVC++ has #defines for min/max which collide with the min/max algorithm
// declarations. The following may still not completely resolve some kinds of
// problems with MSVC++ #defines, though it deals with most cases in production
// game code.
//
#if EASTL_NOMINMAX
#ifdef min
#undef min
#endif
#ifdef max
#undef max
#endif
#endif
///////////////////////////////////////////////////////////////////////////////
// EASTL_LIMITS macros
// These apply to integral types only.
///////////////////////////////////////////////////////////////////////////////
// true or false.
#define EASTL_LIMITS_IS_SIGNED(T) ((T)(-1) < 0)
// The min possible value of T.
#define EASTL_LIMITS_MIN_S(T) ((T)((T)1 << EASTL_LIMITS_DIGITS_S(T)))
#define EASTL_LIMITS_MIN_U(T) ((T)0)
#define EASTL_LIMITS_MIN(T) ((EASTL_LIMITS_IS_SIGNED(T) ? EASTL_LIMITS_MIN_S(T) : EASTL_LIMITS_MIN_U(T)))
// The max possible value of T.
#define EASTL_LIMITS_MAX_S(T) ((T)(((((T)1 << (EASTL_LIMITS_DIGITS(T) - 1)) - 1) << 1) + 1))
#define EASTL_LIMITS_MAX_U(T) ((T)~(T)0)
#define EASTL_LIMITS_MAX(T) ((EASTL_LIMITS_IS_SIGNED(T) ? EASTL_LIMITS_MAX_S(T) : EASTL_LIMITS_MAX_U(T)))
// The number of bits in the representation of T.
#define EASTL_LIMITS_DIGITS_S(T) ((sizeof(T) * CHAR_BIT) - 1)
#define EASTL_LIMITS_DIGITS_U(T) ((sizeof(T) * CHAR_BIT))
#define EASTL_LIMITS_DIGITS(T) ((EASTL_LIMITS_IS_SIGNED(T) ? EASTL_LIMITS_DIGITS_S(T) : EASTL_LIMITS_DIGITS_U(T)))
// The number of decimal digits that can be represented by T.
#define EASTL_LIMITS_DIGITS10_S(T) ((EASTL_LIMITS_DIGITS_S(T) * 643L) / 2136) // (643 / 2136) ~= log10(2).
#define EASTL_LIMITS_DIGITS10_U(T) ((EASTL_LIMITS_DIGITS_U(T) * 643L) / 2136)
#define EASTL_LIMITS_DIGITS10(T) ((EASTL_LIMITS_IS_SIGNED(T) ? EASTL_LIMITS_DIGITS10_S(T) : EASTL_LIMITS_DIGITS10_U(T)))
namespace eastl
{
// See C++11 18.3.2.5
enum float_round_style
{
round_indeterminate = -1, /// Intermediate.
round_toward_zero = 0, /// To zero.
round_to_nearest = 1, /// To the nearest representable value.
round_toward_infinity = 2, /// To infinity.
round_toward_neg_infinity = 3 /// To negative infinity.
};
// See C++11 18.3.2.6
enum float_denorm_style
{
denorm_indeterminate = -1, /// It cannot be determined whether or not the type allows denormalized values.
denorm_absent = 0, /// The type does not allow denormalized values.
denorm_present = 1 /// The type allows denormalized values.
};
// Default numeric_limits.
// See C++11 18.3.2.3
template<typename T>
class numeric_limits;
// Const/volatile variations of numeric_limits.
template<typename T>
class numeric_limits<const T>
: public numeric_limits<T>
{};
template<typename T>
class numeric_limits<volatile T>
: public numeric_limits<T>
{};
template<typename T>
class numeric_limits<const volatile T>
: public numeric_limits<T>
{};
// numeric_limits<bool>
template<>
class numeric_limits<bool>
{
public:
typedef bool value_type;
static constexpr bool is_specialized = true;
static constexpr int digits = 1; // In practice bool is stores as a byte, or sometimes an int.
static constexpr int digits10 = 0;
static constexpr int max_digits10 = 0;
static constexpr bool is_signed = false; // In practice bool may be implemented as signed char.
static constexpr bool is_integer = true;
static constexpr bool is_exact = true;
static constexpr int radix = 2;
static constexpr int min_exponent = 0;
static constexpr int min_exponent10 = 0;
static constexpr int max_exponent = 0;
static constexpr int max_exponent10 = 0;
static constexpr bool is_bounded = true;
static constexpr bool is_modulo = false;
static constexpr bool traps = true; // Should this be true or false? Given that it's implemented in hardware as an integer type, we use true.
static constexpr bool tinyness_before = false;
static constexpr float_round_style round_style = round_toward_zero;
static constexpr bool has_infinity = false;
static constexpr bool has_quiet_NaN = false;
static constexpr bool has_signaling_NaN = false;
static constexpr float_denorm_style has_denorm = denorm_absent;
static constexpr bool has_denorm_loss = false;
static constexpr bool is_iec559 = false;
static constexpr value_type min()
{ return false; }
static constexpr value_type max()
{ return true; }
static constexpr value_type lowest()
{ return false; }
static constexpr value_type epsilon()
{ return false; }
static constexpr value_type round_error()
{ return false; }
static constexpr value_type infinity()
{ return value_type(); }
static constexpr value_type quiet_NaN()
{ return value_type(); }
static constexpr value_type signaling_NaN()
{ return value_type(); }
static constexpr value_type denorm_min()
{ return value_type(); }
};
// numeric_limits<char>
template<>
class numeric_limits<char>
{
public:
typedef char value_type;
static constexpr bool is_specialized = true;
static constexpr int digits = EASTL_LIMITS_DIGITS(value_type);
static constexpr int digits10 = EASTL_LIMITS_DIGITS10(value_type);
static constexpr int max_digits10 = 0;
static constexpr bool is_signed = EASTL_LIMITS_IS_SIGNED(value_type);
static constexpr bool is_integer = true;
static constexpr bool is_exact = true;
static constexpr int radix = 2;
static constexpr int min_exponent = 0;
static constexpr int min_exponent10 = 0;
static constexpr int max_exponent = 0;
static constexpr int max_exponent10 = 0;
static constexpr bool is_bounded = true;
static constexpr bool is_modulo = true;
static constexpr bool traps = true;
static constexpr bool tinyness_before = false;
static constexpr float_round_style round_style = round_toward_zero;
static constexpr bool has_infinity = false;
static constexpr bool has_quiet_NaN = false;
static constexpr bool has_signaling_NaN = false;
static constexpr float_denorm_style has_denorm = denorm_absent;
static constexpr bool has_denorm_loss = false;
static constexpr bool is_iec559 = false;
static constexpr value_type min()
{ return EASTL_LIMITS_MIN(value_type); }
static constexpr value_type max()
{ return EASTL_LIMITS_MAX(value_type); }
static constexpr value_type lowest()
{ return EASTL_LIMITS_MIN(value_type); }
static constexpr value_type epsilon()
{ return 0; }
static constexpr value_type round_error()
{ return 0; }
static constexpr value_type infinity()
{ return value_type(); } // Question: Should we return 0 here or value_type()?
static constexpr value_type quiet_NaN()
{ return value_type(); }
static constexpr value_type signaling_NaN()
{ return value_type(); }
static constexpr value_type denorm_min()
{ return (value_type)0; }
};
// numeric_limits<unsigned char>
template<>
class numeric_limits<unsigned char>
{
public:
typedef unsigned char value_type;
static constexpr bool is_specialized = true;
static constexpr int digits = EASTL_LIMITS_DIGITS_U(value_type);
static constexpr int digits10 = EASTL_LIMITS_DIGITS10_U(value_type);
static constexpr int max_digits10 = 0;
static constexpr bool is_signed = false;
static constexpr bool is_integer = true;
static constexpr bool is_exact = true;
static constexpr int radix = 2;
static constexpr int min_exponent = 0;
static constexpr int min_exponent10 = 0;
static constexpr int max_exponent = 0;
static constexpr int max_exponent10 = 0;
static constexpr bool is_bounded = true;
static constexpr bool is_modulo = true;
static constexpr bool traps = true;
static constexpr bool tinyness_before = false;
static constexpr float_round_style round_style = round_toward_zero;
static constexpr bool has_infinity = false;
static constexpr bool has_quiet_NaN = false;
static constexpr bool has_signaling_NaN = false;
static constexpr float_denorm_style has_denorm = denorm_absent;
static constexpr bool has_denorm_loss = false;
static constexpr bool is_iec559 = false;
static constexpr value_type min()
{ return 0; }
static constexpr value_type max()
{ return EASTL_LIMITS_MAX_U(value_type); }
static constexpr value_type lowest()
{ return 0; }
static constexpr value_type epsilon()
{ return 0; }
static constexpr value_type round_error()
{ return 0; }
static constexpr value_type infinity()
{ return value_type(); }
static constexpr value_type quiet_NaN()
{ return value_type(); }
static constexpr value_type signaling_NaN()
{ return value_type(); }
static constexpr value_type denorm_min()
{ return (value_type)0; }
};
// numeric_limits<signed char>
template<>
class numeric_limits<signed char>
{
public:
typedef signed char value_type;
static constexpr bool is_specialized = true;
static constexpr int digits = EASTL_LIMITS_DIGITS_S(value_type);
static constexpr int digits10 = EASTL_LIMITS_DIGITS10_S(value_type);
static constexpr int max_digits10 = 0;
static constexpr bool is_signed = true;
static constexpr bool is_integer = true;
static constexpr bool is_exact = true;
static constexpr int radix = 2;
static constexpr int min_exponent = 0;
static constexpr int min_exponent10 = 0;
static constexpr int max_exponent = 0;
static constexpr int max_exponent10 = 0;
static constexpr bool is_bounded = true;
static constexpr bool is_modulo = true;
static constexpr bool traps = true;
static constexpr bool tinyness_before = false;
static constexpr float_round_style round_style = round_toward_zero;
static constexpr bool has_infinity = false;
static constexpr bool has_quiet_NaN = false;
static constexpr bool has_signaling_NaN = false;
static constexpr float_denorm_style has_denorm = denorm_absent;
static constexpr bool has_denorm_loss = false;
static constexpr bool is_iec559 = false;
static constexpr value_type min()
{ return EASTL_LIMITS_MIN_S(value_type); }
static constexpr value_type max()
{ return EASTL_LIMITS_MAX_S(value_type); }
static constexpr value_type lowest()
{ return EASTL_LIMITS_MIN_S(value_type); }
static constexpr value_type epsilon()
{ return 0; }
static constexpr value_type round_error()
{ return 0; }
static constexpr value_type infinity()
{ return value_type(); }
static constexpr value_type quiet_NaN()
{ return value_type(); }
static constexpr value_type signaling_NaN()
{ return value_type(); }
static constexpr value_type denorm_min()
{ return (value_type)0; }
};
// numeric_limits<wchar_t>
// VC++ has the option of making wchar_t simply be unsigned short. If that's enabled then
// the code below could possibly cause compile failures due to redundancy. The best resolution
// may be to use __wchar_t here for VC++ instead of wchar_t, as __wchar_t is always a true
// unique type under VC++. http://social.msdn.microsoft.com/Forums/en-US/vclanguage/thread/9059330a-7cce-4d0d-a8e0-e1dcb63322bd/
template<>
class numeric_limits<wchar_t>
{
public:
typedef wchar_t value_type;
static constexpr bool is_specialized = true;
static constexpr int digits = EASTL_LIMITS_DIGITS(value_type);
static constexpr int digits10 = EASTL_LIMITS_DIGITS10(value_type);
static constexpr int max_digits10 = 0;
static constexpr bool is_signed = EASTL_LIMITS_IS_SIGNED(value_type);
static constexpr bool is_integer = true;
static constexpr bool is_exact = true;
static constexpr int radix = 2;
static constexpr int min_exponent = 0;
static constexpr int min_exponent10 = 0;
static constexpr int max_exponent = 0;
static constexpr int max_exponent10 = 0;
static constexpr bool is_bounded = true;
static constexpr bool is_modulo = true;
static constexpr bool traps = true;
static constexpr bool tinyness_before = false;
static constexpr float_round_style round_style = round_toward_zero;
static constexpr bool has_infinity = false;
static constexpr bool has_quiet_NaN = false;
static constexpr bool has_signaling_NaN = false;
static constexpr float_denorm_style has_denorm = denorm_absent;
static constexpr bool has_denorm_loss = false;
static constexpr bool is_iec559 = false;
static constexpr value_type min()
{ return EASTL_LIMITS_MIN(value_type); }
static constexpr value_type max()
{ return EASTL_LIMITS_MAX(value_type); }
static constexpr value_type lowest()
{ return EASTL_LIMITS_MIN(value_type); }
static constexpr value_type epsilon()
{ return 0; }
static constexpr value_type round_error()
{ return 0; }
static constexpr value_type infinity()
{ return value_type(); }
static constexpr value_type quiet_NaN()
{ return value_type(); }
static constexpr value_type signaling_NaN()
{ return value_type(); }
static constexpr value_type denorm_min()
{ return (value_type)0; }
};
#if defined(EA_CHAR8_UNIQUE) && EA_CHAR8_UNIQUE
template<>
class numeric_limits<char8_t>
{
public:
typedef char8_t value_type;
static constexpr bool is_specialized = true;
static constexpr int digits = EASTL_LIMITS_DIGITS(value_type);
static constexpr int digits10 = EASTL_LIMITS_DIGITS10(value_type);
static constexpr int max_digits10 = 0;
static constexpr bool is_signed = EASTL_LIMITS_IS_SIGNED(value_type);
static constexpr bool is_integer = true;
static constexpr bool is_exact = true;
static constexpr int radix = 2;
static constexpr int min_exponent = 0;
static constexpr int min_exponent10 = 0;
static constexpr int max_exponent = 0;
static constexpr int max_exponent10 = 0;
static constexpr bool is_bounded = true;
static constexpr bool is_modulo = true;
static constexpr bool traps = true;
static constexpr bool tinyness_before = false;
static constexpr float_round_style round_style = round_toward_zero;
static constexpr bool has_infinity = false;
static constexpr bool has_quiet_NaN = false;
static constexpr bool has_signaling_NaN = false;
static constexpr float_denorm_style has_denorm = denorm_absent;
static constexpr bool has_denorm_loss = false;
static constexpr bool is_iec559 = false;
static constexpr value_type min()
{ return EASTL_LIMITS_MIN(value_type); }
static constexpr value_type max()
{ return EASTL_LIMITS_MAX(value_type); }
static constexpr value_type lowest()
{ return EASTL_LIMITS_MIN(value_type); }
static constexpr value_type epsilon()
{ return 0; }
static constexpr value_type round_error()
{ return 0; }
static constexpr value_type infinity()
{ return 0; }
static constexpr value_type quiet_NaN()
{ return 0; }
static constexpr value_type signaling_NaN()
{ return 0; }
static constexpr value_type denorm_min()
{ return (value_type)0; }
};
#endif
#if EA_CHAR16_NATIVE // If char16_t is a true unique type (as called for by the C++11 Standard)...
// numeric_limits<char16_t>
template<>
class numeric_limits<char16_t>
{
public:
typedef char16_t value_type;
static constexpr bool is_specialized = true;
static constexpr int digits = EASTL_LIMITS_DIGITS(value_type);
static constexpr int digits10 = EASTL_LIMITS_DIGITS10(value_type);
static constexpr int max_digits10 = 0;
static constexpr bool is_signed = EASTL_LIMITS_IS_SIGNED(value_type);
static constexpr bool is_integer = true;
static constexpr bool is_exact = true;
static constexpr int radix = 2;
static constexpr int min_exponent = 0;
static constexpr int min_exponent10 = 0;
static constexpr int max_exponent = 0;
static constexpr int max_exponent10 = 0;
static constexpr bool is_bounded = true;
static constexpr bool is_modulo = true;
static constexpr bool traps = true;
static constexpr bool tinyness_before = false;
static constexpr float_round_style round_style = round_toward_zero;
static constexpr bool has_infinity = false;
static constexpr bool has_quiet_NaN = false;
static constexpr bool has_signaling_NaN = false;
static constexpr float_denorm_style has_denorm = denorm_absent;
static constexpr bool has_denorm_loss = false;
static constexpr bool is_iec559 = false;
static constexpr value_type min()
{ return EASTL_LIMITS_MIN(value_type); }
static constexpr value_type max()
{ return EASTL_LIMITS_MAX(value_type); }
static constexpr value_type lowest()
{ return EASTL_LIMITS_MIN(value_type); }
static constexpr value_type epsilon()
{ return 0; }
static constexpr value_type round_error()
{ return 0; }
static constexpr value_type infinity()
{ return value_type(); }
static constexpr value_type quiet_NaN()
{ return value_type(); }
static constexpr value_type signaling_NaN()
{ return value_type(); }
static constexpr value_type denorm_min()
{ return (value_type)0; }
};
#endif
#if EA_CHAR32_NATIVE // If char32_t is a true unique type (as called for by the C++11 Standard)...
// numeric_limits<char32_t>
template<>
class numeric_limits<char32_t>
{
public:
typedef char32_t value_type;
static constexpr bool is_specialized = true;
static constexpr int digits = EASTL_LIMITS_DIGITS(value_type);
static constexpr int digits10 = EASTL_LIMITS_DIGITS10(value_type);
static constexpr int max_digits10 = 0;
static constexpr bool is_signed = EASTL_LIMITS_IS_SIGNED(value_type);
static constexpr bool is_integer = true;
static constexpr bool is_exact = true;
static constexpr int radix = 2;
static constexpr int min_exponent = 0;
static constexpr int min_exponent10 = 0;
static constexpr int max_exponent = 0;
static constexpr int max_exponent10 = 0;
static constexpr bool is_bounded = true;
static constexpr bool is_modulo = true;
static constexpr bool traps = true;
static constexpr bool tinyness_before = false;
static constexpr float_round_style round_style = round_toward_zero;
static constexpr bool has_infinity = false;
static constexpr bool has_quiet_NaN = false;
static constexpr bool has_signaling_NaN = false;
static constexpr float_denorm_style has_denorm = denorm_absent;
static constexpr bool has_denorm_loss = false;
static constexpr bool is_iec559 = false;
static constexpr value_type min()
{ return EASTL_LIMITS_MIN(value_type); }
static constexpr value_type max()
{ return EASTL_LIMITS_MAX(value_type); }
static constexpr value_type lowest()
{ return EASTL_LIMITS_MIN(value_type); }
static constexpr value_type epsilon()
{ return 0; }
static constexpr value_type round_error()
{ return 0; }
static constexpr value_type infinity()
{ return value_type(); }
static constexpr value_type quiet_NaN()
{ return value_type(); }
static constexpr value_type signaling_NaN()
{ return value_type(); }
static constexpr value_type denorm_min()
{ return (value_type)0; }
};
#endif
// numeric_limits<unsigned short>
template<>
class numeric_limits<unsigned short>
{
public:
typedef unsigned short value_type;
static constexpr bool is_specialized = true;
static constexpr int digits = EASTL_LIMITS_DIGITS_U(value_type);
static constexpr int digits10 = EASTL_LIMITS_DIGITS10_U(value_type);
static constexpr int max_digits10 = 0;
static constexpr bool is_signed = false;
static constexpr bool is_integer = true;
static constexpr bool is_exact = true;
static constexpr int radix = 2;
static constexpr int min_exponent = 0;
static constexpr int min_exponent10 = 0;
static constexpr int max_exponent = 0;
static constexpr int max_exponent10 = 0;
static constexpr bool is_bounded = true;
static constexpr bool is_modulo = true;
static constexpr bool traps = true;
static constexpr bool tinyness_before = false;
static constexpr float_round_style round_style = round_toward_zero;
static constexpr bool has_infinity = false;
static constexpr bool has_quiet_NaN = false;
static constexpr bool has_signaling_NaN = false;
static constexpr float_denorm_style has_denorm = denorm_absent;
static constexpr bool has_denorm_loss = false;
static constexpr bool is_iec559 = false;
static constexpr value_type min()
{ return 0; }
static constexpr value_type max()
{ return EASTL_LIMITS_MAX_U(value_type); }
static constexpr value_type lowest()
{ return 0; }
static constexpr value_type epsilon()
{ return 0; }
static constexpr value_type round_error()
{ return 0; }
static constexpr value_type infinity()
{ return value_type(); }
static constexpr value_type quiet_NaN()
{ return value_type(); }
static constexpr value_type signaling_NaN()
{ return value_type(); }
static constexpr value_type denorm_min()
{ return static_cast<value_type>(0); }
};
// numeric_limits<signed short>
template<>
class numeric_limits<signed short>
{
public:
typedef signed short value_type;
static constexpr bool is_specialized = true;
static constexpr int digits = EASTL_LIMITS_DIGITS_S(value_type);
static constexpr int digits10 = EASTL_LIMITS_DIGITS10_S(value_type);
static constexpr int max_digits10 = 0;
static constexpr bool is_signed = true;
static constexpr bool is_integer = true;
static constexpr bool is_exact = true;
static constexpr int radix = 2;
static constexpr int min_exponent = 0;
static constexpr int min_exponent10 = 0;
static constexpr int max_exponent = 0;
static constexpr int max_exponent10 = 0;
static constexpr bool is_bounded = true;
static constexpr bool is_modulo = true;
static constexpr bool traps = true;
static constexpr bool tinyness_before = false;
static constexpr float_round_style round_style = round_toward_zero;
static constexpr bool has_infinity = false;
static constexpr bool has_quiet_NaN = false;
static constexpr bool has_signaling_NaN = false;
static constexpr float_denorm_style has_denorm = denorm_absent;
static constexpr bool has_denorm_loss = false;
static constexpr bool is_iec559 = false;
static constexpr value_type min()
{ return EASTL_LIMITS_MIN_S(value_type); }
static constexpr value_type max()
{ return EASTL_LIMITS_MAX_S(value_type); }
static constexpr value_type lowest()
{ return EASTL_LIMITS_MIN_S(value_type); }
static constexpr value_type epsilon()
{ return 0; }
static constexpr value_type round_error()
{ return 0; }
static constexpr value_type infinity()
{ return value_type(); }
static constexpr value_type quiet_NaN()
{ return value_type(); }
static constexpr value_type signaling_NaN()
{ return value_type(); }
static constexpr value_type denorm_min()
{ return static_cast<value_type>(0); }
};
// numeric_limits<unsigned int>
template<>
class numeric_limits<unsigned int>
{
public:
typedef unsigned int value_type;
static constexpr bool is_specialized = true;
static constexpr int digits = EASTL_LIMITS_DIGITS_U(value_type);
static constexpr int digits10 = EASTL_LIMITS_DIGITS10_U(value_type);
static constexpr int max_digits10 = 0;
static constexpr bool is_signed = false;
static constexpr bool is_integer = true;
static constexpr bool is_exact = true;
static constexpr int radix = 2;
static constexpr int min_exponent = 0;
static constexpr int min_exponent10 = 0;
static constexpr int max_exponent = 0;
static constexpr int max_exponent10 = 0;
static constexpr bool is_bounded = true;
static constexpr bool is_modulo = true;
static constexpr bool traps = true;
static constexpr bool tinyness_before = false;
static constexpr float_round_style round_style = round_toward_zero;
static constexpr bool has_infinity = false;
static constexpr bool has_quiet_NaN = false;
static constexpr bool has_signaling_NaN = false;
static constexpr float_denorm_style has_denorm = denorm_absent;
static constexpr bool has_denorm_loss = false;
static constexpr bool is_iec559 = false;
static constexpr value_type min()
{ return 0; }
static constexpr value_type max()
{ return EASTL_LIMITS_MAX_U(value_type); }
static constexpr value_type lowest()
{ return 0; }
static constexpr value_type epsilon()
{ return 0; }
static constexpr value_type round_error()
{ return 0; }
static constexpr value_type infinity()
{ return value_type(); }
static constexpr value_type quiet_NaN()
{ return value_type(); }
static constexpr value_type signaling_NaN()
{ return value_type(); }
static constexpr value_type denorm_min()
{ return static_cast<value_type>(0); }
};
// numeric_limits<signed int>
template<>
class numeric_limits<signed int>
{
public:
typedef signed int value_type;
static constexpr bool is_specialized = true;
static constexpr int digits = EASTL_LIMITS_DIGITS_S(value_type);
static constexpr int digits10 = EASTL_LIMITS_DIGITS10_S(value_type);
static constexpr int max_digits10 = 0;
static constexpr bool is_signed = true;
static constexpr bool is_integer = true;
static constexpr bool is_exact = true;
static constexpr int radix = 2;
static constexpr int min_exponent = 0;
static constexpr int min_exponent10 = 0;
static constexpr int max_exponent = 0;
static constexpr int max_exponent10 = 0;
static constexpr bool is_bounded = true;
static constexpr bool is_modulo = true;
static constexpr bool traps = true;
static constexpr bool tinyness_before = false;
static constexpr float_round_style round_style = round_toward_zero;
static constexpr bool has_infinity = false;
static constexpr bool has_quiet_NaN = false;
static constexpr bool has_signaling_NaN = false;
static constexpr float_denorm_style has_denorm = denorm_absent;
static constexpr bool has_denorm_loss = false;
static constexpr bool is_iec559 = false;
static constexpr value_type min()
{ return INT_MIN; } // It's hard to get EASTL_LIMITS_MIN_S to work with all compilers here.
static constexpr value_type max()
{ return EASTL_LIMITS_MAX_S(value_type); }
static constexpr value_type lowest()
{ return INT_MIN; }
static constexpr value_type epsilon()
{ return 0; }
static constexpr value_type round_error()
{ return 0; }
static constexpr value_type infinity()
{ return value_type(); }
static constexpr value_type quiet_NaN()
{ return value_type(); }
static constexpr value_type signaling_NaN()
{ return value_type(); }
static constexpr value_type denorm_min()
{ return static_cast<value_type>(0); }
};
// numeric_limits<unsigned long>
template<>
class numeric_limits<unsigned long>
{
public:
typedef unsigned long value_type;
static constexpr bool is_specialized = true;
static constexpr int digits = EASTL_LIMITS_DIGITS_U(value_type);
static constexpr int digits10 = EASTL_LIMITS_DIGITS10_U(value_type);
static constexpr int max_digits10 = 0;
static constexpr bool is_signed = false;
static constexpr bool is_integer = true;
static constexpr bool is_exact = true;
static constexpr int radix = 2;
static constexpr int min_exponent = 0;
static constexpr int min_exponent10 = 0;
static constexpr int max_exponent = 0;
static constexpr int max_exponent10 = 0;
static constexpr bool is_bounded = true;
static constexpr bool is_modulo = true;
static constexpr bool traps = true;
static constexpr bool tinyness_before = false;
static constexpr float_round_style round_style = round_toward_zero;
static constexpr bool has_infinity = false;
static constexpr bool has_quiet_NaN = false;
static constexpr bool has_signaling_NaN = false;
static constexpr float_denorm_style has_denorm = denorm_absent;
static constexpr bool has_denorm_loss = false;
static constexpr bool is_iec559 = false;
static constexpr value_type min()
{ return 0; }
static constexpr value_type max()
{ return EASTL_LIMITS_MAX_U(value_type); }
static constexpr value_type lowest()
{ return 0; }
static constexpr value_type epsilon()
{ return 0; }
static constexpr value_type round_error()
{ return 0; }
static constexpr value_type infinity()
{ return value_type(); }
static constexpr value_type quiet_NaN()
{ return value_type(); }
static constexpr value_type signaling_NaN()
{ return value_type(); }
static constexpr value_type denorm_min()
{ return static_cast<value_type>(0); }
};
// numeric_limits<signed long>
template<>
class numeric_limits<signed long>
{
public:
typedef signed long value_type;
static constexpr bool is_specialized = true;
static constexpr int digits = EASTL_LIMITS_DIGITS_S(value_type);
static constexpr int digits10 = EASTL_LIMITS_DIGITS10_S(value_type);
static constexpr int max_digits10 = 0;
static constexpr bool is_signed = true;
static constexpr bool is_integer = true;
static constexpr bool is_exact = true;
static constexpr int radix = 2;
static constexpr int min_exponent = 0;
static constexpr int min_exponent10 = 0;
static constexpr int max_exponent = 0;
static constexpr int max_exponent10 = 0;
static constexpr bool is_bounded = true;
static constexpr bool is_modulo = true;
static constexpr bool traps = true;
static constexpr bool tinyness_before = false;
static constexpr float_round_style round_style = round_toward_zero;
static constexpr bool has_infinity = false;
static constexpr bool has_quiet_NaN = false;
static constexpr bool has_signaling_NaN = false;
static constexpr float_denorm_style has_denorm = denorm_absent;
static constexpr bool has_denorm_loss = false;
static constexpr bool is_iec559 = false;
static constexpr value_type min()
{ return LONG_MIN; } // It's hard to get EASTL_LIMITS_MIN_S to work with all compilers here.
static constexpr value_type max()
{ return EASTL_LIMITS_MAX_S(value_type); }
static constexpr value_type lowest()
{ return LONG_MIN; }
static constexpr value_type epsilon()
{ return 0; }
static constexpr value_type round_error()
{ return 0; }
static constexpr value_type infinity()
{ return value_type(); }
static constexpr value_type quiet_NaN()
{ return value_type(); }
static constexpr value_type signaling_NaN()
{ return value_type(); }
static constexpr value_type denorm_min()