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// Copyright (C) 2020-2021 Primate Labs Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the names of the copyright holders nor the names of their
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef LITEHTML_TSTRING_VIEW_H__
#define LITEHTML_TSTRING_VIEW_H__
#include <cstddef>
#include <ostream>
namespace litehtml {
// tstring_view is a string reference type that provides a view into a string
// that is owned elsewhere (e.g., by a std::string object).
// tstring_view implements the same interface as std::base_string_view in the
// standard library. When litehtml moves to C++17 consider replacing the
// tstring_view implementation with the standard library implementations
// (e.g., via a using statement).
class tstring_view {
public:
using value_type = char;
using pointer = char*;
using const_pointer = const char*;
using reference = char&;
using const_reference = const char&;
using iterator = const_pointer;
using const_iterator = const_pointer;
using size_type = size_t;
using difference_type = std::ptrdiff_t;
public:
tstring_view() = default;
tstring_view(const tstring_view& other) = default;
tstring_view(const_pointer s, size_type size)
: data_(s)
, size_(size)
{
}
constexpr const_iterator begin() const
{
return data_;
}
constexpr const_iterator cbegin() const
{
return data_;
}
constexpr const_iterator end() const
{
return data_ + size_;
}
constexpr const_iterator cend() const
{
return data_ + size_;
}
constexpr const_reference operator[](size_type offset) const
{
return *(data_ + offset);
}
constexpr const_pointer data() const
{
return data_;
}
size_type size() const
{
return size_;
}
size_type length() const
{
return size_;
}
bool empty() const
{
return (size_ == 0);
}
private:
const_pointer data_ = nullptr;
size_type size_ = 0;
};
std::basic_ostream<tstring_view::value_type>& operator<<(
std::basic_ostream<tstring_view::value_type>&,
tstring_view str);
} // namespace litehtml
#endif // LITEHTML_TSTRING_VIEW_H__
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