2 * Copyright (c) 1989 The Regents of the University of California.
5 * This code is derived from software contributed to Berkeley by
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * $FreeBSD: src/usr.bin/yacc/warshall.c,v 1.6 1999/08/28 01:08:04 peter Exp $
40 static char const sccsid[] = "@(#)warshall.c 5.4 (Berkeley) 5/24/93";
45 static void transitive_closure __P((unsigned *, int));
48 transitive_closure(R, n)
54 register unsigned *rowj;
55 register unsigned *rp;
56 register unsigned *rend;
57 register unsigned *ccol;
58 register unsigned *relend;
59 register unsigned *cword;
60 register unsigned *rowi;
62 rowsize = WORDSIZE(n);
63 relend = R + n*rowsize;
78 rend = rowj + rowsize;
90 if (++i >= BITS_PER_WORD)
101 reflexive_transitive_closure(R, n)
105 register int rowsize;
107 register unsigned *rp;
108 register unsigned *relend;
110 transitive_closure(R, n);
112 rowsize = WORDSIZE(n);
113 relend = R + n*rowsize;
120 if (++i >= BITS_PER_WORD)