forked from qt-creator/qt-creator
ae485ac551
Utf8String is allocating memory but for many compares it is not needed. In an inner loop this can be expensive. Change-Id: I6320823ab7e086008447eea255e52859a7faaad7 Reviewed-by: Ivan Donchevskii <ivan.donchevskii@qt.io> Reviewed-by: Nikolai Kosjar <nikolai.kosjar@qt.io>
139 lines
3.6 KiB
C++
139 lines
3.6 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of Qt Creator.
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**
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3 as published by the Free Software
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** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-3.0.html.
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**
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****************************************************************************/
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#pragma once
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#include <clang-c/CXString.h>
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#include <utf8string.h>
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#include <cstring>
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#include <ostream>
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namespace ClangBackEnd {
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class ClangString
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{
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public:
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ClangString(CXString cxString)
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: cxString(cxString)
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{
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}
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~ClangString()
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{
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clang_disposeString(cxString);
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}
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ClangString(const ClangString &) = delete;
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const ClangString &operator=(const ClangString &) = delete;
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ClangString(ClangString &&other)
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: cxString(std::move(other.cxString))
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{
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other.cxString.data = nullptr;
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other.cxString.private_flags = 0;
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}
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ClangString &operator=(ClangString &&other)
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{
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if (this != &other) {
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clang_disposeString(cxString);
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cxString = std::move(other.cxString);
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other.cxString.data = nullptr;
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other.cxString.private_flags = 0;
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}
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return *this;
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}
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const char *cString() const
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{
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return clang_getCString(cxString);
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}
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operator Utf8String() const
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{
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return Utf8String(cString(), -1);
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}
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bool isNull() const
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{
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return cxString.data == nullptr;
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}
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bool hasContent() const
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{
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return !isNull() && std::strlen(cString()) > 0;
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}
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friend bool operator==(const ClangString &first, const ClangString &second)
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{
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return std::strcmp(first.cString(), second.cString()) == 0;
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}
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template<std::size_t Size>
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friend bool operator==(const ClangString &first, const char(&second)[Size])
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{
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return std::strncmp(first.cString(), second, Size) == 0; // Size includes \0
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}
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template<std::size_t Size>
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friend bool operator==(const char(&first)[Size], const ClangString &second)
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{
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return second == first;
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}
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template<typename Type,
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typename = typename std::enable_if<std::is_pointer<Type>::value>::type
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>
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friend bool operator==(const ClangString &first, Type second)
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{
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return std::strcmp(first.cString(), second) == 0;
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}
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template<typename Type,
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typename = typename std::enable_if<std::is_pointer<Type>::value>::type
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>
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friend bool operator==(Type first, const ClangString &second)
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{
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return second == first;
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}
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friend std::ostream &operator<<(std::ostream &out, const ClangString &string)
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{
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out << string.cString();
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return out;
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}
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private:
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CXString cxString;
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};
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} // namespace ClangBackEnd
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