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/*
* Inkscape::Util::GSListIterator - STL iterator for GSList
* Inkscape::Util::GSListConstIterator - STL iterator for GSList
* Inkscape::Util::GListIterator - STL iterator for GList
* Inkscape::Util::GListConstIterator - STL iterator for GList
*
* Authors:
* MenTaLguY <mental@rydia.net>
*
* Copyright (C) 2005 MenTaLguY
*
* Released under GNU GPL, read the file 'COPYING' for more information
*/
#ifndef SEEN_INKSCAPE_GLIB_LIST_ITERATORS_H
#define SEEN_INKSCAPE_GLIB_LIST_ITERATORS_H
#include <cstddef>
#include <iterator>
#include "glib/gslist.h"
#include "glib/glist.h"
namespace Inkscape {
namespace Util {
template <typename T> class GSListConstIterator;
template <typename T> class GSListIterator;
template <typename T> class GListConstIterator;
template <typename T> class GListIterator;
template <typename T>
class GSListConstIterator<T *> {
public:
typedef std::forward_iterator_tag iterator_category;
typedef T * const value_type;
typedef std::ptrdiff_t difference_type;
typedef value_type *pointer;
typedef value_type &reference;
GSListConstIterator(GSList const *list) : _list(list) {}
// default copy
// default assign
GSList const *list() const { return _list; }
reference operator*() const {
return *reinterpret_cast<pointer>(&_list->data);
}
bool operator==(GSListConstIterator const &other) {
return other._list == _list;
}
bool operator!=(GSListConstIterator const &other) {
return other._list != _list;
}
GSListConstIterator &operator++() {
_list = _list->next;
return *this;
}
GSListConstIterator operator++(int) {
GSListConstIterator saved=*this;
_list = _list->next;
return saved;
}
private:
GSList const *_list;
};
template <typename T>
class GSListIterator<T *> {
public:
typedef std::forward_iterator_tag iterator_category;
typedef T *value_type;
typedef std::ptrdiff_t difference_type;
typedef value_type *pointer;
typedef value_type &reference;
typedef value_type const &const_reference;
GSListIterator(GSList *list) : _list(list) {}
// default copy
// default assign
operator GSListConstIterator<T *>() const { return _list; }
GSList const *list() const { return _list; }
GSList *list() { return _list; }
const_reference operator*() const {
return *reinterpret_cast<pointer>(&_list->data);
}
reference operator*() {
return *reinterpret_cast<pointer>(&_list->data);
}
bool operator==(GSListIterator const &other) {
return other._list == _list;
}
bool operator!=(GSListIterator const &other) {
return other._list != _list;
}
GSListIterator &operator++() {
_list = _list->next;
return *this;
}
GSListIterator operator++(int) {
GSListIterator saved=*this;
_list = _list->next;
return saved;
}
private:
GSList *_list;
};
template <typename T>
class GListConstIterator<T *> {
public:
typedef std::bidirectional_iterator_tag iterator_category;
typedef T * const value_type;
typedef std::ptrdiff_t difference_type;
typedef value_type *pointer;
typedef value_type &reference;
GListConstIterator(GList const *list) : _list(list) {}
// default copy
// default assign
GList const *list() const { return _list; }
reference operator*() const {
return *reinterpret_cast<pointer>(&_list->data);
}
bool operator==(GListConstIterator const &other) {
return other._list == _list;
}
bool operator!=(GListConstIterator const &other) {
return other._list != _list;
}
GListConstIterator &operator++() {
_list = _list->next;
return *this;
}
GListConstIterator operator++(int) {
GListConstIterator saved=*this;
_list = _list->next;
return saved;
}
GListConstIterator &operator--() {
_list = _list->prev;
return *this;
}
GListConstIterator operator--(int) {
GListConstIterator saved=*this;
_list = _list->prev;
return saved;
}
private:
GList const *_list;
};
template <typename T>
class GListIterator<T *> {
public:
typedef std::bidirectional_iterator_tag iterator_category;
typedef T *value_type;
typedef std::ptrdiff_t difference_type;
typedef value_type *pointer;
typedef value_type &reference;
typedef value_type const &const_reference;
GListIterator(GList *list) : _list(list) {}
// default copy
// default assign
operator GSListConstIterator<T *>() const {
return reinterpret_cast<GSList *>(_list);
}
operator GSListIterator<T *>() const {
return reinterpret_cast<GSList *>(_list);
}
operator GListConstIterator<T *>() const { return _list; }
GList const *list() const { return _list; }
GList *list() { return _list; }
const_reference operator*() const {
return *reinterpret_cast<pointer>(&_list->data);
}
reference operator*() { return *reinterpret_cast<pointer>(&_list->data); }
bool operator==(GListIterator const &other) {
return other._list == _list;
}
bool operator!=(GListIterator const &other) {
return other._list != _list;
}
GListIterator &operator++() {
_list = _list->next;
return *this;
}
GListIterator operator++(int) {
GListIterator saved=*this;
_list = _list->next;
return saved;
}
GListIterator &operator--() {
_list = _list->prev;
return *this;
}
GListIterator operator--(int) {
GListIterator saved=*this;
_list = _list->prev;
return saved;
}
private:
GList *_list;
};
}
}
#endif
/*
Local Variables:
mode:c++
c-file-style:"stroustrup"
c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
indent-tabs-mode:nil
fill-column:99
End:
*/
// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :
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