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138 lines
4.6 KiB
C
138 lines
4.6 KiB
C
/* tree.h: BINARY TREE HEADER
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*
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* $Id$
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* Copyright (C) 2014 Ravenbrook Limited. See end of file for license.
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*
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* Simple binary trees, for use as building blocks.
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*/
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#ifndef tree_h
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#define tree_h
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#include "check.h"
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#include "mpmtypes.h"
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typedef struct TreeStruct *Tree;
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typedef struct TreeStruct {
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Tree left, right;
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} TreeStruct;
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typedef void *TreeKey;
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typedef Compare (*TreeCompare)(Tree tree, TreeKey key);
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typedef TreeKey (*TreeKeyMethod)(Tree tree);
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#define TreeEMPTY ((Tree)0)
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extern Bool TreeCheck(Tree tree);
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extern Bool TreeCheckLeaf(Tree tree);
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extern Count TreeDebugCount(Tree tree, TreeCompare compare, TreeKeyMethod key);
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#define TreeInit(tree) \
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BEGIN \
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Tree _tree = (tree); \
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AVER(_tree != NULL); \
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_tree->left = TreeEMPTY; \
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_tree->right = TreeEMPTY; \
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AVER(TreeCheck(_tree)); \
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END
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#define TreeFinish(tree) \
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BEGIN \
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Tree _tree = (tree); \
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AVER(TreeCheckLeaf(_tree)); \
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END
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#define TREE_ELT(type, field, node) \
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PARENT(type ## Struct, field, node)
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#define TreeLeft(tree) RVALUE((tree)->left)
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#define TreeRight(tree) RVALUE((tree)->right)
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#define TreeSetLeft(tree, child) \
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BEGIN \
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(tree)->left = (child); \
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END
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#define TreeSetRight(tree, child) \
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BEGIN \
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(tree)->right = (child); \
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END
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#define TreeClearLeft(tree) \
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BEGIN \
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(tree)->left = TreeEMPTY; \
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END
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#define TreeClearRight(tree) \
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BEGIN \
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(tree)->right = TreeEMPTY; \
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END
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#define TreeHasLeft(tree) (TreeLeft(tree) != TreeEMPTY)
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#define TreeHasRight(tree) (TreeRight(tree) != TreeEMPTY)
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extern Compare TreeFind(Tree *treeReturn, Tree root,
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TreeKey key, TreeCompare compare);
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extern Bool TreeInsert(Tree *treeReturn, Tree root, Tree node,
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TreeKey key, TreeCompare compare);
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typedef Bool TreeVisitor(Tree tree, void *closureP, Size closureS);
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extern Bool TreeTraverse(Tree tree,
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TreeCompare compare,
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TreeKeyMethod key,
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TreeVisitor visit, void *closureP, Size closureS);
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extern Bool TreeTraverseMorris(Tree tree, TreeVisitor visit,
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void *closureP, Size closureS);
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extern void TreeRotateLeft(Tree *nodeIO);
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extern void TreeRotateRight(Tree *nodeIO);
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extern Tree TreeReverseLeftSpine(Tree tree);
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extern Tree TreeReverseRightSpine(Tree tree);
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extern Count TreeToVine(Tree *treeIO);
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extern void TreeBalance(Tree *treeIO);
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#endif /* tree_h */
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/* C. COPYRIGHT AND LICENSE
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*
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* Copyright (C) 2014 Ravenbrook Limited <http://www.ravenbrook.com/>.
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* All rights reserved. This is an open source license. Contact
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* Ravenbrook for commercial licensing options.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Redistributions in any form must be accompanied by information on how
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* to obtain complete source code for this software and any accompanying
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* software that uses this software. The source code must either be
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* included in the distribution or be available for no more than the cost
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* of distribution plus a nominal fee, and must be freely redistributable
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* under reasonable conditions. For an executable file, complete source
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* code means the source code for all modules it contains. It does not
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* include source code for modules or files that typically accompany the
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* major components of the operating system on which the executable file
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* runs.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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* PURPOSE, OR NON-INFRINGEMENT, ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDERS AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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