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50 lines
1.6 KiB
C
50 lines
1.6 KiB
C
/* Binary relations.
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Copyright (C) 2002, 2004, 2009, 2010 Free Software Foundation, Inc.
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This file is part of Bison, the GNU Compiler Compiler.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef RELATION_H_
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# define RELATION_H_
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/* Performing operations on graphs coded as list of adjacency.
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If GRAPH is a relation, then GRAPH[Node] is a list of adjacent
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nodes, ended with END_NODE. */
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#define END_NODE ((relation_node) -1)
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typedef size_t relation_node;
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typedef relation_node *relation_nodes;
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typedef relation_nodes *relation;
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/* Report a relation R that has SIZE vertices. */
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void relation_print (relation r, relation_node size, FILE *out);
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/* Compute the transitive closure of the FUNCTION on the relation R
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with SIZE vertices.
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If R (NODE-1, NODE-2) then on exit FUNCTION[NODE - 1] was extended
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(unioned) with FUNCTION[NODE - 2]. */
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void relation_digraph (relation r, relation_node size, bitsetv *function);
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/* Destructively transpose *R_ARG, of size N. */
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void relation_transpose (relation *R_arg, relation_node n);
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#endif /* ! RELATION_H_ */
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