src/relation.h

   1 /* Binary relations.
   2
   3    Copyright (C) 2002, 2004, 2009-2012 Free Software Foundation, Inc.
   4
   5    This file is part of Bison, the GNU Compiler Compiler.
   6
   7    This program is free software: you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation, either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20
  21 #ifndef RELATION_H_
  22 # define RELATION_H_
  23
  24 /* Performing operations on graphs coded as list of adjacency.
  25
  26    If GRAPH is a relation, then GRAPH[Node] is a list of adjacent
  27    nodes, ended with END_NODE.  */
  28
  29 # define END_NODE ((relation_node) -1)
  30
  31 typedef size_t relation_node;
  32 typedef relation_node *relation_nodes;
  33 typedef relation_nodes *relation;
  34
  35
  36 /* Report a relation R that has SIZE vertices.  */
  37 void relation_print (relation r, relation_node size, FILE *out);
  38
  39 /* Compute the transitive closure of the FUNCTION on the relation R
  40    with SIZE vertices.
  41
  42    If R (NODE-1, NODE-2) then on exit FUNCTION[NODE - 1] was extended
  43    (unioned) with FUNCTION[NODE - 2].  */
  44 void relation_digraph (relation r, relation_node size, bitsetv *function);
  45
  46 /* Destructively transpose *R_ARG, of size N.  */
  47 void relation_transpose (relation *R_arg, relation_node n);
  48
  49 #endif /* ! RELATION_H_ */