forked from bartvdbraak/blender
86 lines
2.6 KiB
C++
86 lines
2.6 KiB
C++
/*
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Copyright (c) 2005 Gino van den Bergen / Erwin Coumans <www.erwincoumans.com>
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Permission is hereby granted, free of charge, to any person or organization
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obtaining a copy of the software and accompanying documentation covered by
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this license (the "Software") to use, reproduce, display, distribute,
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execute, and transmit the Software, and to prepare derivative works of the
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Software, and to permit third-parties to whom the Software is furnished to
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do so, all subject to the following:
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The copyright notices in the Software and this entire statement, including
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the above license grant, this restriction and the following disclaimer,
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must be included in all copies of the Software, in whole or in part, and
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all derivative works of the Software, unless such copies or derivative
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works are solely in the form of machine-executable object code generated by
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a source language processor.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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DEALINGS IN THE SOFTWARE.
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*/
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#ifndef GEN_LIST_H
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#define GEN_LIST_H
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class GEN_Link {
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public:
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GEN_Link() : m_next(0), m_prev(0) {}
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GEN_Link(GEN_Link *next, GEN_Link *prev) : m_next(next), m_prev(prev) {}
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GEN_Link *getNext() const { return m_next; }
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GEN_Link *getPrev() const { return m_prev; }
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bool isHead() const { return m_prev == 0; }
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bool isTail() const { return m_next == 0; }
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void insertBefore(GEN_Link *link) {
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m_next = link;
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m_prev = link->m_prev;
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m_next->m_prev = this;
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m_prev->m_next = this;
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}
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void insertAfter(GEN_Link *link) {
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m_next = link->m_next;
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m_prev = link;
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m_next->m_prev = this;
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m_prev->m_next = this;
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}
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void remove() {
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m_next->m_prev = m_prev;
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m_prev->m_next = m_next;
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}
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private:
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GEN_Link *m_next;
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GEN_Link *m_prev;
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};
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class GEN_List {
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public:
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GEN_List() : m_head(&m_tail, 0), m_tail(0, &m_head) {}
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GEN_Link *getHead() const { return m_head.getNext(); }
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GEN_Link *getTail() const { return m_tail.getPrev(); }
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void addHead(GEN_Link *link) { link->insertAfter(&m_head); }
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void addTail(GEN_Link *link) { link->insertBefore(&m_tail); }
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private:
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GEN_Link m_head;
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GEN_Link m_tail;
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};
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#endif
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