84 lines
1.2 KiB
C
84 lines
1.2 KiB
C
#include "defs.h"
|
|
|
|
transitive_closure(R, n)
|
|
unsigned *R;
|
|
int n;
|
|
{
|
|
register int rowsize;
|
|
register unsigned mask;
|
|
register unsigned *rowj;
|
|
register unsigned *rp;
|
|
register unsigned *rend;
|
|
register unsigned *ccol;
|
|
register unsigned *relend;
|
|
register unsigned *cword;
|
|
register unsigned *rowi;
|
|
|
|
rowsize = WORDSIZE(n);
|
|
relend = R + n*rowsize;
|
|
|
|
cword = R;
|
|
mask = 1;
|
|
rowi = R;
|
|
while (rowi < relend)
|
|
{
|
|
ccol = cword;
|
|
rowj = R;
|
|
|
|
while (rowj < relend)
|
|
{
|
|
if (*ccol & mask)
|
|
{
|
|
rp = rowi;
|
|
rend = rowj + rowsize;
|
|
while (rowj < rend)
|
|
*rowj++ |= *rp++;
|
|
}
|
|
else
|
|
{
|
|
rowj += rowsize;
|
|
}
|
|
|
|
ccol += rowsize;
|
|
}
|
|
|
|
mask <<= 1;
|
|
if (mask == 0)
|
|
{
|
|
mask = 1;
|
|
cword++;
|
|
}
|
|
|
|
rowi += rowsize;
|
|
}
|
|
}
|
|
|
|
reflexive_transitive_closure(R, n)
|
|
unsigned *R;
|
|
int n;
|
|
{
|
|
register int rowsize;
|
|
register unsigned mask;
|
|
register unsigned *rp;
|
|
register unsigned *relend;
|
|
|
|
transitive_closure(R, n);
|
|
|
|
rowsize = WORDSIZE(n);
|
|
relend = R + n*rowsize;
|
|
|
|
mask = 1;
|
|
rp = R;
|
|
while (rp < relend)
|
|
{
|
|
*rp |= mask;
|
|
mask <<= 1;
|
|
if (mask == 0)
|
|
{
|
|
mask = 1;
|
|
rp++;
|
|
}
|
|
|
|
rp += rowsize;
|
|
}
|
|
}
|