81 lines
2.4 KiB
C++
81 lines
2.4 KiB
C++
/* -*- mode: C++; c-basic-offset: 2; indent-tabs-mode: nil -*- */
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/*
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* Main authors:
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* Guido Tack <tack@gecode.org>
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*
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* Copyright:
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* Guido Tack, 2006
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*
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* This file is part of Gecode, the generic constraint
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* development environment:
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* http://www.gecode.org
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#include <gecode/support.hh>
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#include <gecode/gist/node.hh>
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#include <gecode/gist/visualnode.hh>
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#include <cassert>
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namespace Gecode { namespace Gist {
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void
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Node::setNumberOfChildren(unsigned int n, NodeAllocator& na) {
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assert(getTag() == UNDET);
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switch (n) {
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case 0:
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setTag(LEAF);
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break;
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case 1:
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childrenOrFirstChild =
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reinterpret_cast<void*>(
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static_cast<ptrdiff_t>(na.allocate(getIndex(na)) << 2));
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noOfChildren = 1;
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setTag(TWO_CHILDREN);
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break;
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case 2:
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{
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int idx = getIndex(na);
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childrenOrFirstChild =
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reinterpret_cast<void*>(
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static_cast<ptrdiff_t>(na.allocate(idx) << 2));
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noOfChildren = -na.allocate(idx);
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setTag(TWO_CHILDREN);
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}
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break;
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default:
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{
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int idx = getIndex(na);
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noOfChildren = n;
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int* children = heap.alloc<int>(n);
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childrenOrFirstChild = static_cast<void*>(children);
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setTag(MORE_CHILDREN);
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for (unsigned int i=n; i--;)
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children[i] = na.allocate(idx);
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}
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}
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}
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}}
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// STATISTICS: gist-any
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