/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */ /* * This file is part of the LibreOffice project. * * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ #pragma once #include #include #include #include namespace o3tl { // An approximation of the C++20 integer comparison functions // ( "Safe integral // comparisons"): #if defined __cpp_lib_integer_comparison_functions using std::cmp_equal; using std::cmp_not_equal; using std::cmp_less; using std::cmp_greater; using std::cmp_less_equal; using std::cmp_greater_equal; #else template constexpr bool cmp_equal(T1 value1, T2 value2) noexcept { // coverity[same_on_both_sides: FALSE] if constexpr (std::is_signed_v == std::is_signed_v) { return value1 == value2; } else if constexpr (std::is_signed_v) { return value1 >= 0 && o3tl::make_unsigned(value1) == value2; } else { return value2 >= 0 && value1 == o3tl::make_unsigned(value2); } } template constexpr bool cmp_not_equal(T1 value1, T2 value2) noexcept { return !cmp_equal(value1, value2); } template constexpr bool cmp_less(T1 value1, T2 value2) noexcept { if constexpr (std::is_signed_v == std::is_signed_v) { return value1 < value2; } else if constexpr (std::is_signed_v) { return value1 < 0 || o3tl::make_unsigned(value1) < value2; } else { return value2 >= 0 && value1 < o3tl::make_unsigned(value2); } } template constexpr bool cmp_greater(T1 value1, T2 value2) noexcept { return cmp_less(value2, value1); } template constexpr bool cmp_less_equal(T1 value1, T2 value2) noexcept { return !cmp_greater(value1, value2); } template constexpr bool cmp_greater_equal(T1 value1, T2 value2) noexcept { return !cmp_less(value1, value2); } #endif // A convenient operator syntax around the standard integer comparison functions: template struct IntCmp { explicit constexpr IntCmp(T theValue) : value(theValue) { } T value; }; template constexpr bool operator==(IntCmp value1, IntCmp value2) { return o3tl::cmp_equal(value1.value, value2.value); } template constexpr bool operator!=(IntCmp value1, IntCmp value2) { return o3tl::cmp_not_equal(value1.value, value2.value); } template constexpr bool operator<(IntCmp value1, IntCmp value2) { return o3tl::cmp_less(value1.value, value2.value); } template constexpr bool operator>(IntCmp value1, IntCmp value2) { return o3tl::cmp_greater(value1.value, value2.value); } template constexpr bool operator<=(IntCmp value1, IntCmp value2) { return o3tl::cmp_less_equal(value1.value, value2.value); } template constexpr bool operator>=(IntCmp value1, IntCmp value2) { return o3tl::cmp_greater_equal(value1.value, value2.value); } } /* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */ cp-4.2'>distro/collabora/cp-4.2 LibreOffice 核心代码仓库文档基金会
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