1 //===----------------------------------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #ifndef _LIBCPP___UTILITY_CMP_H 10 #define _LIBCPP___UTILITY_CMP_H 11 12 #include <__config> 13 #include <__utility/forward.h> 14 #include <__utility/move.h> 15 #include <limits> 16 #include <type_traits> 17 18 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 19 #pragma GCC system_header 20 #endif 21 22 _LIBCPP_PUSH_MACROS 23 #include <__undef_macros> 24 25 _LIBCPP_BEGIN_NAMESPACE_STD 26 27 #if !defined(_LIBCPP_HAS_NO_CONCEPTS) 28 template<class _Tp, class... _Up> 29 struct _IsSameAsAny : _Or<_IsSame<_Tp, _Up>...> {}; 30 31 template<class _Tp> 32 concept __is_safe_integral_cmp = is_integral_v<_Tp> && 33 !_IsSameAsAny<_Tp, bool, char 34 #ifndef _LIBCPP_HAS_NO_CHAR8_T 35 , char8_t 36 #endif 37 #ifndef _LIBCPP_HAS_NO_UNICODE_CHARS 38 , char16_t, char32_t 39 #endif 40 #ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 41 , wchar_t 42 #endif 43 >::value; 44 45 template<__is_safe_integral_cmp _Tp, __is_safe_integral_cmp _Up> 46 _LIBCPP_INLINE_VISIBILITY constexpr 47 bool cmp_equal(_Tp __t, _Up __u) noexcept 48 { 49 if constexpr (is_signed_v<_Tp> == is_signed_v<_Up>) 50 return __t == __u; 51 else if constexpr (is_signed_v<_Tp>) 52 return __t < 0 ? false : make_unsigned_t<_Tp>(__t) == __u; 53 else 54 return __u < 0 ? false : __t == make_unsigned_t<_Up>(__u); 55 } 56 57 template<__is_safe_integral_cmp _Tp, __is_safe_integral_cmp _Up> 58 _LIBCPP_INLINE_VISIBILITY constexpr 59 bool cmp_not_equal(_Tp __t, _Up __u) noexcept 60 { 61 return !_VSTD::cmp_equal(__t, __u); 62 } 63 64 template<__is_safe_integral_cmp _Tp, __is_safe_integral_cmp _Up> 65 _LIBCPP_INLINE_VISIBILITY constexpr 66 bool cmp_less(_Tp __t, _Up __u) noexcept 67 { 68 if constexpr (is_signed_v<_Tp> == is_signed_v<_Up>) 69 return __t < __u; 70 else if constexpr (is_signed_v<_Tp>) 71 return __t < 0 ? true : make_unsigned_t<_Tp>(__t) < __u; 72 else 73 return __u < 0 ? false : __t < make_unsigned_t<_Up>(__u); 74 } 75 76 template<__is_safe_integral_cmp _Tp, __is_safe_integral_cmp _Up> 77 _LIBCPP_INLINE_VISIBILITY constexpr 78 bool cmp_greater(_Tp __t, _Up __u) noexcept 79 { 80 return _VSTD::cmp_less(__u, __t); 81 } 82 83 template<__is_safe_integral_cmp _Tp, __is_safe_integral_cmp _Up> 84 _LIBCPP_INLINE_VISIBILITY constexpr 85 bool cmp_less_equal(_Tp __t, _Up __u) noexcept 86 { 87 return !_VSTD::cmp_greater(__t, __u); 88 } 89 90 template<__is_safe_integral_cmp _Tp, __is_safe_integral_cmp _Up> 91 _LIBCPP_INLINE_VISIBILITY constexpr 92 bool cmp_greater_equal(_Tp __t, _Up __u) noexcept 93 { 94 return !_VSTD::cmp_less(__t, __u); 95 } 96 97 template<__is_safe_integral_cmp _Tp, __is_safe_integral_cmp _Up> 98 _LIBCPP_INLINE_VISIBILITY constexpr 99 bool in_range(_Up __u) noexcept 100 { 101 return _VSTD::cmp_less_equal(__u, numeric_limits<_Tp>::max()) && 102 _VSTD::cmp_greater_equal(__u, numeric_limits<_Tp>::min()); 103 } 104 #endif 105 106 _LIBCPP_END_NAMESPACE_STD 107 108 _LIBCPP_POP_MACROS 109 110 #endif // _LIBCPP___UTILITY_CMP_H 111