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49 lines
1.6 KiB
C
49 lines
1.6 KiB
C
/* Binary relations.
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Copyright (C) 2002 Free Software Foundation, Inc.
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This file is part of Bison, the GNU Compiler Compiler.
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Bison 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 2, or (at your option)
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any later version.
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Bison 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 Bison; see the file COPYING. If not, write to
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the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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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_t, then GRAPH[Node] is a list of adjacent
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nodes, ended with -1. */
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typedef short relation_node_t;
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typedef relation_node_t *relation_nodes_t;
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typedef relation_nodes_t *relation_t;
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/* Report a RELATION that has SIZE vertices. */
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void relation_print (relation_t relatio, size_t size, FILE *out);
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/* Compute the transitive closure of the FUNCTION on the RELATION with
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SIZE vertices.
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If RELATION (NODE-1, NODE-2) then on exit FUNCTION[NODE-1] was
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extended (unioned) with FUNCTION[NODE-2]. */
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void relation_digraph (relation_t relation, size_t size, bitsetv *function);
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/* Destructively transpose *R_ARG, of size N. */
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void relation_transpose (relation_t *R_arg, int n);
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#endif /* ! RELATION_H_ */
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