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bi-link.hpp

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00001 /* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
00002 /*
00003  *  Main authors:
00004  *     Christian Schulte <schulte@gecode.org>
00005  *
00006  *  Copyright:
00007  *     Christian Schulte, 2003
00008  *
00009  *  This file is part of Gecode, the generic constraint
00010  *  development environment:
00011  *     http://www.gecode.org
00012  *
00013  *  Permission is hereby granted, free of charge, to any person obtaining
00014  *  a copy of this software and associated documentation files (the
00015  *  "Software"), to deal in the Software without restriction, including
00016  *  without limitation the rights to use, copy, modify, merge, publish,
00017  *  distribute, sublicense, and/or sell copies of the Software, and to
00018  *  permit persons to whom the Software is furnished to do so, subject to
00019  *  the following conditions:
00020  *
00021  *  The above copyright notice and this permission notice shall be
00022  *  included in all copies or substantial portions of the Software.
00023  *
00024  *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
00025  *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00026  *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
00027  *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
00028  *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
00029  *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
00030  *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00031  *
00032  */
00033 
00034 namespace Gecode { namespace Int { namespace ViewValGraph {
00035 
00036   forceinline
00037   BiLink::BiLink(void) {
00038     _prev = this; _next = this;
00039   }
00040 
00041   forceinline BiLink*
00042   BiLink::prev(void) const {
00043     return _prev;
00044   }
00045   forceinline BiLink*
00046   BiLink::next(void) const {
00047     return _next;
00048   }
00049   forceinline void
00050   BiLink::prev(BiLink* l) {
00051     _prev = l;
00052   }
00053   forceinline void
00054   BiLink::next(BiLink* l) {
00055     _next = l;
00056   }
00057 
00058   forceinline void
00059   BiLink::add(BiLink* l) {
00060     l->_prev = this; l->_next = _next;
00061     _next->_prev = l; _next = l;
00062   }
00063   forceinline void
00064   BiLink::unlink(void) {
00065     BiLink* p = _prev; BiLink* n = _next;
00066     p->_next = n; n->_prev = p;
00067   }
00068 
00069   forceinline void
00070   BiLink::mark(void) {
00071     _next = NULL;
00072   }
00073   forceinline bool
00074   BiLink::marked(void) const {
00075     return _next == NULL;
00076   }
00077   forceinline bool
00078   BiLink::empty(void) const {
00079     return _prev == this;
00080   }
00081 
00082 }}}
00083 
00084 // STATISTICS: int-prop
00085