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Diffstat (limited to 'source/blender/blenlib/BLI_listbase_wrapper.hh')
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+/*
+ * 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 2
+ * 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, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#ifndef __BLI_LISTBASE_WRAPPER_HH__
+#define __BLI_LISTBASE_WRAPPER_HH__
+
+/** \file
+ * \ingroup bli
+ *
+ * The purpose of this wrapper is just to make it more comfortable to iterate of ListBase
+ * instances, that are used in many places in Blender.
+ */
+
+#include "BLI_listbase.h"
+#include "DNA_listBase.h"
+
+namespace BLI {
+
+template<typename T> class ListBaseWrapper {
+ private:
+ ListBase *m_listbase;
+
+ public:
+ ListBaseWrapper(ListBase *listbase) : m_listbase(listbase)
+ {
+ BLI_assert(listbase);
+ }
+
+ ListBaseWrapper(ListBase &listbase) : ListBaseWrapper(&listbase)
+ {
+ }
+
+ class Iterator {
+ private:
+ ListBase *m_listbase;
+ T *m_current;
+
+ public:
+ Iterator(ListBase *listbase, T *current) : m_listbase(listbase), m_current(current)
+ {
+ }
+
+ Iterator &operator++()
+ {
+ m_current = m_current->next;
+ return *this;
+ }
+
+ Iterator operator++(int)
+ {
+ Iterator iterator = *this;
+ ++*this;
+ return iterator;
+ }
+
+ bool operator!=(const Iterator &iterator) const
+ {
+ return m_current != iterator.m_current;
+ }
+
+ T *operator*() const
+ {
+ return m_current;
+ }
+ };
+
+ Iterator begin() const
+ {
+ return Iterator(m_listbase, (T *)m_listbase->first);
+ }
+
+ Iterator end() const
+ {
+ return Iterator(m_listbase, nullptr);
+ }
+
+ T get(uint index) const
+ {
+ void *ptr = BLI_findlink(m_listbase, index);
+ BLI_assert(ptr);
+ return (T *)ptr;
+ }
+
+ uint index_of(const T *value) const
+ {
+ uint index = 0;
+ for (T *ptr : *this) {
+ if (ptr == value) {
+ return index;
+ }
+ index++;
+ }
+ BLI_assert(false);
+ return 0;
+ }
+};
+
+} /* namespace BLI */
+
+#endif /* __BLI_LISTBASE_WRAPPER_HH__ */