notepad-plus-plus/boostregex/AnsiDocumentIterator.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 ANSIDOCUMENTITERATOR_H_12481491281240
#define ANSIDOCUMENTITERATOR_H_12481491281240
#include "Position.h"
namespace Scintilla::Internal {
class AnsiDocumentIterator
{
public:
using iterator_category = std::bidirectional_iterator_tag;
using value_type = char;
using difference_type = ptrdiff_t;
using pointer = char*;
using reference = char&;
AnsiDocumentIterator() {};
AnsiDocumentIterator(Document* doc, Sci::Position pos, Sci::Position end) :
m_pos(pos),
m_end(end),
m_doc(doc)
{
// Check for debug builds
PLATFORM_ASSERT(m_pos <= m_end);
// Ensure for release.
if (m_pos > m_end)
{
m_pos = m_end;
}
}
AnsiDocumentIterator(const AnsiDocumentIterator& copy) :
m_pos(copy.m_pos),
m_end(copy.m_end),
m_doc(copy.m_doc)
{
// Check for debug builds
PLATFORM_ASSERT(m_pos <= m_end);
// Ensure for release.
if (m_pos > m_end)
{
m_pos = m_end;
}
}
bool operator == (const AnsiDocumentIterator& other) const
{
return (ended() == other.ended()) && (m_doc == other.m_doc) && (m_pos == other.m_pos);
}
bool operator != (const AnsiDocumentIterator& other) const
{
return !(*this == other);
}
char operator * () const
{
return charAt(m_pos);
}
AnsiDocumentIterator& operator ++ ()
{
PLATFORM_ASSERT(m_pos < m_end);
m_pos++;
return *this;
}
AnsiDocumentIterator& operator -- ()
{
m_pos--;
return *this;
}
Sci::Position pos() const
{
return m_pos;
}
private:
char charAt(Sci::Position position) const
{
return m_doc->CharAt(position);
}
bool ended() const
{
return m_pos == m_end;
}
Sci::Position m_pos = 0;
Sci::Position m_end = 0;
Document* m_doc = nullptr;
};
}
#endif