* src/lalr.c (traverse, digraph, matrix_print, transpose): Move

[bison.git] / src / relation.h

diff --git a/src/relation.h b/src/relation.h
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+/* Binary relations.
+   Copyright (C) 2002  Free Software Foundation, Inc.
+
+   This file is part of Bison, the GNU Compiler Compiler.
+
+   Bison is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   Bison is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with Bison; see the file COPYING.  If not, write to
+   the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+
+#ifndef RELATION_H_
+# define RELATION_H_
+
+/* Performing operations on graphs coded as list of adjacency.
+
+   If GRAPH is a relation_t, then GRAPH[Node] is a list of adjacent
+   nodes, ended with -1.  */
+
+typedef short relation_node_t;
+typedef relation_node_t *relation_nodes_t;
+typedef relation_nodes_t *relation_t;
+
+
+/* Report a RELATION that has SIZE vertices.  */
+void relation_print PARAMS ((relation_t relation, size_t size,
+                            FILE *out));
+
+/* Compute the transitive closure of the FUNCTION on the RELATION with
+   SIZE vertices.
+
+   If RELATION (NODE-1, NODE-2) then on exit FUNCTION[NODE-1] was
+   extended (unioned) with FUNCTION[NODE-2].  */
+void relation_digraph PARAMS ((relation_t relation, size_t size,
+                              bitsetv *function));
+
+/* Destructively transpose *R_ARG, of size N.  */
+void relation_transpose PARAMS ((relation_t *R_arg, int n));
+
+#endif /* ! RELATION_H_ */