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Diffstat (limited to 'source/blender/blenlib/BLI_listbase_wrapper.h')
-rw-r--r-- | source/blender/blenlib/BLI_listbase_wrapper.h | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/source/blender/blenlib/BLI_listbase_wrapper.h b/source/blender/blenlib/BLI_listbase_wrapper.h new file mode 100644 index 00000000000..90755d551b1 --- /dev/null +++ b/source/blender/blenlib/BLI_listbase_wrapper.h @@ -0,0 +1,97 @@ +/* + * 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. + */ + +/** \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. + */ + +#pragma once + +#include "BLI_listbase.h" +#include "DNA_listBase.h" + +namespace BLI { + +template<typename T> class IntrusiveListBaseWrapper { + private: + ListBase *m_listbase; + + public: + IntrusiveListBaseWrapper(ListBase *listbase) : m_listbase(listbase) + { + BLI_assert(listbase); + } + + IntrusiveListBaseWrapper(ListBase &listbase) : IntrusiveListBaseWrapper(&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; + } +}; + +} /* namespace BLI */ |