notepad-plus-plus/boostregex/UTF8DocumentIterator.h

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// This file is part of Notepad++ project
// Copyright (C) 2021 Notepad++ authors.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// at your option any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
#ifndef UTF8DOCUMENTITERATOR_H_3452843291318441149
#define UTF8DOCUMENTITERATOR_H_3452843291318441149
#include <stdlib.h>
#include <vector>
#include <memory>
#include "Position.h"
namespace Scintilla::Internal {
class Document;
class UTF8DocumentIterator
{
public:
using iterator_category = std::bidirectional_iterator_tag;
using value_type = wchar_t;
using difference_type = ptrdiff_t;
using pointer = wchar_t*;
using reference = wchar_t&;
UTF8DocumentIterator() {};
UTF8DocumentIterator(Document* doc, Sci::Position pos, Sci::Position end);
UTF8DocumentIterator(const UTF8DocumentIterator& copy);
bool operator == (const UTF8DocumentIterator& other) const
{
return (ended() == other.ended()) && (m_doc == other.m_doc) && (m_pos == other.m_pos);
}
bool operator != (const UTF8DocumentIterator& other) const
{
return !(*this == other);
}
wchar_t operator * () const
{
return m_character[m_characterIndex];
}
UTF8DocumentIterator& operator = (Sci::Position other)
{
m_pos = other;
return *this;
}
UTF8DocumentIterator& operator ++ ();
UTF8DocumentIterator& operator -- ();
Sci::Position pos() const
{
return m_pos;
}
private:
void readCharacter();
bool ended() const
{
return m_pos >= m_end;
}
Sci::Position m_pos = 0;
wchar_t m_character[2];
Sci::Position m_end = 0;
int m_characterIndex = 0;
int m_utf8Length = 0;
int m_utf16Length = 0;
Document* m_doc = nullptr;
static const unsigned char m_firstByteMask[];
};
}
#endif // UTF8DOCUMENTITERATOR_H_3452843291318441149