Adding upstream version 1.2.2.upstream/1.2.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 122 insertions, 0 deletions

diff --git a/src/util/forward-pointer-iterator.h b/src/util/forward-pointer-iterator.h
new file mode 100644
index 0000000..9fe3bb8
--- /dev/null
+++ b/src/util/forward-pointer-iterator.h
@@ -0,0 +1,122 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Inkscape::Util::ForwardPointerIterator - wraps a simple pointer
+ *                                          with various strategies
+ *                                          to determine sequence
+ *
+ * Authors:
+ *   MenTaLguY <mental@rydia.net>
+ *
+ * Copyright (C) 2004 MenTaLguY
+ *
+ * Released under GNU GPL v2+, read the file 'COPYING' for more information.
+ */
+
+#ifndef SEEN_INKSCAPE_UTIL_FORWARD_POINTER_ITERATOR_H
+#define SEEN_INKSCAPE_UTIL_FORWARD_POINTER_ITERATOR_H
+
+#include <iterator>
+#include <cstddef>
+#include "util/reference.h"
+
+namespace Inkscape {
+
+namespace Util {
+
+template <typename BaseType, typename Strategy>
+class ForwardPointerIterator;
+
+template <typename BaseType, typename Strategy>
+class ForwardPointerIterator<BaseType const, Strategy> {
+public:
+    typedef std::forward_iterator_tag iterator_category;
+    typedef typename Traits::Reference<BaseType const>::LValue value_type;
+    typedef std::ptrdiff_t difference_type;
+    typedef typename Traits::Reference<BaseType const>::LValue reference;
+    typedef typename Traits::Reference<BaseType const>::RValue const_reference;
+    typedef typename Traits::Reference<BaseType const>::Pointer pointer;
+
+    typedef ForwardPointerIterator<BaseType const, Strategy> Self;
+
+    ForwardPointerIterator() = default;
+    ForwardPointerIterator(pointer p) : _p(p) {}
+
+    operator pointer() const { return _p; }
+    reference operator*() const { return *_p; }
+    pointer operator->() const { return _p; }
+
+    bool operator==(Self const &other) const {
+        return _p == other._p;
+    }
+    bool operator!=(Self const &other) const {
+        return _p != other._p;
+    }
+
+    Self &operator++() {
+        _p = Strategy::next(_p);
+        return *this;
+    }
+    Self operator++(int) {
+        Self old(*this);
+        operator++();
+        return old;
+    }
+
+    operator bool() const { return _p != nullptr; }
+
+private:
+    pointer _p;
+};
+
+template <typename BaseType, typename Strategy>
+class ForwardPointerIterator
+: public ForwardPointerIterator<BaseType const, Strategy>
+{
+public:
+    typedef typename Traits::Reference<BaseType>::LValue value_type;
+    typedef typename Traits::Reference<BaseType>::LValue reference;
+    typedef typename Traits::Reference<BaseType>::RValue const_reference;
+    typedef typename Traits::Reference<BaseType>::Pointer pointer;
+
+    typedef ForwardPointerIterator<BaseType const, Strategy> Ancestor;
+    typedef ForwardPointerIterator<BaseType, Strategy> Self;
+
+    ForwardPointerIterator() : Ancestor() {}
+    ForwardPointerIterator(pointer p) : Ancestor(p) {}
+
+    operator pointer() const {
+        return const_cast<pointer>(Ancestor::operator->());
+    }
+    reference operator*() const {
+        return const_cast<reference>(Ancestor::operator*());
+    }
+    pointer operator->() const {
+        return const_cast<pointer>(Ancestor::operator->());
+    }
+
+    Self &operator++() {
+        Ancestor::operator++();
+        return *this;
+    }
+    Self operator++(int) {
+        Self old(*this);
+        operator++();
+        return old;
+    }
+};
+
+}
+
+}
+
+#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:fileencoding=utf-8:textwidth=99 :