9f1056ccbf
1) register variables have been killed, except for the ones in the generated skeleton (which should probably also be killed soon). 2) __P(())ified prototypes for all functions. 3) new style __RCSID's, and #include <sys/cdefs.h>'s. 4) all warnings generated with WARNS=1 (i.e. all warnings you get from gcc with -Wall -Wstrict-prototypes -Wmissing-prototypes) have been fixed, although not always in the best possible way. in particular on #4, in a couple of places I got "control reaches end of non-void function" errors, and sadly __dead doesn't seem to really work, so I inserted a couple of exit() calls in strategic places. These should be nuked if someone can get __dead to Do The Right Thing. There were also a couple of places where "while (foo = bar)" things cropped up and I didn't do the best conceivable thing, but I usually did. These fixes should probably go back to the byacc maintainers.
134 lines
3.2 KiB
C
134 lines
3.2 KiB
C
/* $NetBSD: warshall.c,v 1.5 1997/07/25 16:46:40 perry Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 1989 The Regents of the University of California.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Robert Paul Corbett.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#ifndef lint
|
|
#if 0
|
|
static char sccsid[] = "@(#)warshall.c 5.4 (Berkeley) 5/24/93";
|
|
#else
|
|
__RCSID("$NetBSD: warshall.c,v 1.5 1997/07/25 16:46:40 perry Exp $");
|
|
#endif
|
|
#endif /* not lint */
|
|
|
|
#include "defs.h"
|
|
|
|
void transitive_closure __P((unsigned *, int));
|
|
|
|
void
|
|
transitive_closure(R, n)
|
|
unsigned *R;
|
|
int n;
|
|
{
|
|
int rowsize;
|
|
unsigned i;
|
|
unsigned *rowj;
|
|
unsigned *rp;
|
|
unsigned *rend;
|
|
unsigned *ccol;
|
|
unsigned *relend;
|
|
unsigned *cword;
|
|
unsigned *rowi;
|
|
|
|
rowsize = WORDSIZE(n);
|
|
relend = R + n*rowsize;
|
|
|
|
cword = R;
|
|
i = 0;
|
|
rowi = R;
|
|
while (rowi < relend)
|
|
{
|
|
ccol = cword;
|
|
rowj = R;
|
|
|
|
while (rowj < relend)
|
|
{
|
|
if (*ccol & (1 << i))
|
|
{
|
|
rp = rowi;
|
|
rend = rowj + rowsize;
|
|
while (rowj < rend)
|
|
*rowj++ |= *rp++;
|
|
}
|
|
else
|
|
{
|
|
rowj += rowsize;
|
|
}
|
|
|
|
ccol += rowsize;
|
|
}
|
|
|
|
if (++i >= BITS_PER_WORD)
|
|
{
|
|
i = 0;
|
|
cword++;
|
|
}
|
|
|
|
rowi += rowsize;
|
|
}
|
|
}
|
|
|
|
void
|
|
reflexive_transitive_closure(R, n)
|
|
unsigned *R;
|
|
int n;
|
|
{
|
|
int rowsize;
|
|
unsigned i;
|
|
unsigned *rp;
|
|
unsigned *relend;
|
|
|
|
transitive_closure(R, n);
|
|
|
|
rowsize = WORDSIZE(n);
|
|
relend = R + n*rowsize;
|
|
|
|
i = 0;
|
|
rp = R;
|
|
while (rp < relend)
|
|
{
|
|
*rp |= (1 << i);
|
|
if (++i >= BITS_PER_WORD)
|
|
{
|
|
i = 0;
|
|
rp++;
|
|
}
|
|
|
|
rp += rowsize;
|
|
}
|
|
}
|