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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
****************************************************************************/
#pragma once
#include "smallstringiterator.h"
#include <QtGlobal>
#include <cstring>
namespace Utils {
class SmallStringView
{
public:
using const_iterator = Internal::SmallStringIterator<std::random_access_iterator_tag, const char>;
using const_reverse_iterator = std::reverse_iterator<const_iterator>;
using size_type = std::size_t;
template<size_type Size>
constexpr
SmallStringView(const char(&string)[Size]) noexcept
: m_pointer(string),
m_size(Size - 1)
{
static_assert(Size >= 1, "Invalid string literal! Length is zero!");
}
template<typename Type,
typename = std::enable_if_t<std::is_pointer<Type>::value>
>
SmallStringView(Type characterPointer) noexcept
: m_pointer(characterPointer),
m_size(std::strlen(characterPointer))
{
static_assert(!std::is_array<Type>::value, "Input type is array and not char pointer!");
}
constexpr
SmallStringView(const char *const string, const size_type size) noexcept
: m_pointer(string),
m_size(size)
{
}
static
SmallStringView fromUtf8(const char *const characterPointer)
{
return SmallStringView(characterPointer, std::strlen(characterPointer));
}
constexpr
const char *data() const
{
return m_pointer;
}
constexpr
size_type size() const
{
return m_size;
}
const_iterator begin() const noexcept
{
return data();
}
const_iterator end() const noexcept
{
return data() + size();
}
const_reverse_iterator rbegin() const noexcept
{
return const_reverse_iterator(end() - static_cast<std::size_t>(1));
}
const_reverse_iterator rend() const noexcept
{
return const_reverse_iterator(begin() - static_cast<std::size_t>(1));
}
private:
const char *m_pointer;
size_type m_size;
};
inline
bool operator==(const SmallStringView& first, const SmallStringView& second) noexcept
{
if (Q_LIKELY(first.size() != second.size()))
return false;
return !std::memcmp(first.data(), second.data(), first.size());
}
inline
bool operator!=(const SmallStringView& first, const SmallStringView& second) noexcept
{
return !(first == second);
}
} // namespace Utils
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