mirror of
https://github.com/SerenityOS/serenity
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ae3ffdd521
This patch adds the `USING_AK_GLOBALLY` macro which is enabled by default, but can be overridden by build flags. This is a step towards integrating Jakt and AK types.
135 lines
4.0 KiB
C++
135 lines
4.0 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Types.h>
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namespace AK {
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template<typename T>
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struct NumericLimits {
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};
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template<>
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struct NumericLimits<bool> {
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static constexpr bool min() { return false; }
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static constexpr bool max() { return true; }
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static constexpr bool is_signed() { return false; }
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};
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template<>
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struct NumericLimits<signed char> {
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static constexpr signed char min() { return -__SCHAR_MAX__ - 1; }
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static constexpr signed char max() { return __SCHAR_MAX__; }
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static constexpr bool is_signed() { return true; }
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};
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template<>
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struct NumericLimits<char> {
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static constexpr char min() { return -__SCHAR_MAX__ - 1; }
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static constexpr char max() { return __SCHAR_MAX__; }
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static constexpr bool is_signed() { return true; }
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};
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template<>
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struct NumericLimits<short> {
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static constexpr short min() { return -__SHRT_MAX__ - 1; }
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static constexpr short max() { return __SHRT_MAX__; }
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static constexpr bool is_signed() { return true; }
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};
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template<>
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struct NumericLimits<int> {
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static constexpr int min() { return -__INT_MAX__ - 1; }
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static constexpr int max() { return __INT_MAX__; }
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static constexpr bool is_signed() { return true; }
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};
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template<>
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struct NumericLimits<long> {
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static constexpr long min() { return -__LONG_MAX__ - 1; }
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static constexpr long max() { return __LONG_MAX__; }
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static constexpr bool is_signed() { return true; }
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};
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template<>
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struct NumericLimits<long long> {
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static constexpr long long min() { return -__LONG_LONG_MAX__ - 1; }
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static constexpr long long max() { return __LONG_LONG_MAX__; }
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static constexpr bool is_signed() { return true; }
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};
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template<>
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struct NumericLimits<unsigned char> {
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static constexpr unsigned char min() { return 0; }
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static constexpr unsigned char max() { return __SCHAR_MAX__ * 2u + 1; }
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static constexpr bool is_signed() { return false; }
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};
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template<>
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struct NumericLimits<unsigned short> {
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static constexpr unsigned short min() { return 0; }
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static constexpr unsigned short max() { return __SHRT_MAX__ * 2u + 1; }
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static constexpr bool is_signed() { return false; }
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};
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template<>
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struct NumericLimits<unsigned> {
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static constexpr unsigned min() { return 0; }
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static constexpr unsigned max() { return __INT_MAX__ * 2u + 1; }
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static constexpr bool is_signed() { return false; }
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};
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template<>
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struct NumericLimits<unsigned long> {
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static constexpr unsigned long min() { return 0; }
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static constexpr unsigned long max() { return __LONG_MAX__ * 2ul + 1; }
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static constexpr bool is_signed() { return false; }
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};
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template<>
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struct NumericLimits<unsigned long long> {
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static constexpr unsigned long long min() { return 0; }
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static constexpr unsigned long long max() { return __LONG_LONG_MAX__ * 2ull + 1; }
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static constexpr bool is_signed() { return false; }
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};
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#ifndef KERNEL
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template<>
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struct NumericLimits<float> {
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static constexpr float lowest() { return -__FLT_MAX__; }
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static constexpr float min() { return __FLT_MIN__; }
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static constexpr float max() { return __FLT_MAX__; }
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static constexpr float epsilon() { return __FLT_EPSILON__; }
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static constexpr bool is_signed() { return true; }
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};
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template<>
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struct NumericLimits<double> {
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static constexpr double lowest() { return -__DBL_MAX__; }
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static constexpr double min() { return __DBL_MIN__; }
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static constexpr double max() { return __DBL_MAX__; }
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static constexpr double epsilon() { return __DBL_EPSILON__; }
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static constexpr bool is_signed() { return true; }
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};
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template<>
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struct NumericLimits<long double> {
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static constexpr long double lowest() { return -__LDBL_MAX__; }
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static constexpr long double min() { return __LDBL_MIN__; }
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static constexpr long double max() { return __LDBL_MAX__; }
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static constexpr long double epsilon() { return __LDBL_EPSILON__; }
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static constexpr bool is_signed() { return true; }
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};
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#endif
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}
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#if USING_AK_GLOBALLY
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using AK::NumericLimits;
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#endif
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