79 lines
2.0 KiB
C++
79 lines
2.0 KiB
C++
/*
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* Copyright 2003-2021 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifndef MPD_ICU_COMPARE_HXX
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#define MPD_ICU_COMPARE_HXX
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#include "util/Compiler.h"
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#include "util/AllocatedString.hxx"
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#include <string_view>
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#ifdef _WIN32
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#include <wchar.h>
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#endif
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/**
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* This class can compare one string ("needle") with lots of other
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* strings ("haystacks") efficiently, ignoring case. With some
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* configurations, it can prepare a case-folded version of the needle.
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*/
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class IcuCompare {
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#ifdef _WIN32
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/* Windows API functions work with wchar_t strings, so let's
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cache the MultiByteToWideChar() result for performance */
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BasicAllocatedString<wchar_t> needle;
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#else
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AllocatedString needle;
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#endif
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public:
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IcuCompare():needle(nullptr) {}
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explicit IcuCompare(std::string_view needle) noexcept;
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IcuCompare(const IcuCompare &src) noexcept
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:needle(src
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? src.needle.Clone()
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: nullptr) {}
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IcuCompare &operator=(const IcuCompare &src) noexcept {
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needle = src
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? src.needle.Clone()
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: nullptr;
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return *this;
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}
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IcuCompare(IcuCompare &&) = default;
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IcuCompare &operator=(IcuCompare &&) = default;
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gcc_pure
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operator bool() const noexcept {
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return !needle.IsNull();
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}
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gcc_pure
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bool operator==(const char *haystack) const noexcept;
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gcc_pure
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bool IsIn(const char *haystack) const noexcept;
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};
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#endif
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