/* Binary relations.
- Copyright (C) 2002 Free Software Foundation, Inc.
+
+ Copyright (C) 2002, 2004-2005, 2009-2012 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
+ This program 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.
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
- Bison is distributed in the hope that it will be useful,
+ This program 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. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+#include <config.h>
#include "system.h"
#include <bitsetv.h>
#include "relation.h"
void
-relation_print (relation r, size_t size, FILE *out)
+relation_print (relation r, relation_node size, FILE *out)
{
- unsigned i, j;
+ relation_node i;
+ relation_node j;
for (i = 0; i < size; ++i)
{
- fprintf (out, "%3d: ", i);
+ fprintf (out, "%3lu: ", (unsigned long int) i);
if (r[i])
- for (j = 0; r[i][j] != -1; ++j)
- fprintf (out, "%3d ", r[i][j]);
+ for (j = 0; r[i][j] != END_NODE; ++j)
+ fprintf (out, "%3lu ", (unsigned long int) r[i][j]);
fputc ('\n', out);
}
fputc ('\n', out);
static relation R;
static relation_nodes INDEX;
static relation_nodes VERTICES;
-static int top;
-static int infinity;
+static relation_node top;
+static relation_node infinity;
static bitsetv F;
static void
-traverse (int i)
+traverse (relation_node i)
{
- int j;
- int height;
+ relation_node j;
+ relation_node height;
VERTICES[++top] = i;
INDEX[i] = height = top;
if (R[i])
- for (j = 0; R[i][j] >= 0; ++j)
+ for (j = 0; R[i][j] != END_NODE; ++j)
{
- if (INDEX[R[i][j]] == 0)
- traverse (R[i][j]);
+ if (INDEX[R[i][j]] == 0)
+ traverse (R[i][j]);
- if (INDEX[i] > INDEX[R[i][j]])
- INDEX[i] = INDEX[R[i][j]];
+ if (INDEX[i] > INDEX[R[i][j]])
+ INDEX[i] = INDEX[R[i][j]];
- bitset_or (F[i], F[i], F[R[i][j]]);
+ bitset_or (F[i], F[i], F[R[i][j]]);
}
if (INDEX[i] == height)
for (;;)
{
- j = VERTICES[top--];
- INDEX[j] = infinity;
+ j = VERTICES[top--];
+ INDEX[j] = infinity;
- if (i == j)
- break;
+ if (i == j)
+ break;
- bitset_copy (F[j], F[i]);
+ bitset_copy (F[j], F[i]);
}
}
void
-relation_digraph (relation r, size_t size, bitsetv *function)
+relation_digraph (relation r, relation_node size, bitsetv *function)
{
- unsigned i;
+ relation_node i;
infinity = size + 2;
- CALLOC (INDEX, size + 1);
- CALLOC (VERTICES, size + 1);
+ INDEX = xcalloc (size + 1, sizeof *INDEX);
+ VERTICES = xnmalloc (size + 1, sizeof *VERTICES);
top = 0;
R = r;
F = *function;
- for (i = 0; i < size; i++)
- INDEX[i] = 0;
-
for (i = 0; i < size; i++)
if (INDEX[i] == 0 && R[i])
traverse (i);
- XFREE (INDEX);
- XFREE (VERTICES);
+ free (INDEX);
+ free (VERTICES);
*function = F;
}
`-------------------------------------------*/
void
-relation_transpose (relation *R_arg, int n)
+relation_transpose (relation *R_arg, relation_node n)
{
+ relation r = *R_arg;
/* The result. */
- relation new_R = CALLOC (new_R, n);
+ relation new_R = xnmalloc (n, sizeof *new_R);
/* END_R[I] -- next entry of NEW_R[I]. */
- relation end_R = CALLOC (end_R, n);
+ relation end_R = xnmalloc (n, sizeof *end_R);
/* NEDGES[I] -- total size of NEW_R[I]. */
- int *nedges = CALLOC (nedges, n);
- int i, j;
+ size_t *nedges = xcalloc (n, sizeof *nedges);
+ relation_node i;
+ relation_node j;
if (trace_flag & trace_sets)
{
fputs ("relation_transpose: input\n", stderr);
- relation_print (*R_arg, n, stderr);
+ relation_print (r, n, stderr);
}
/* Count. */
for (i = 0; i < n; i++)
- if ((*R_arg)[i])
- for (j = 0; (*R_arg)[i][j] >= 0; ++j)
- ++nedges[(*R_arg)[i][j]];
+ if (r[i])
+ for (j = 0; r[i][j] != END_NODE; ++j)
+ ++nedges[r[i][j]];
/* Allocate. */
for (i = 0; i < n; i++)
- if (nedges[i] > 0)
- {
- relation_node *sp = CALLOC (sp, nedges[i] + 1);
- sp[nedges[i]] = -1;
- new_R[i] = sp;
- end_R[i] = sp;
- }
+ {
+ relation_node *sp = NULL;
+ if (nedges[i] > 0)
+ {
+ sp = xnmalloc (nedges[i] + 1, sizeof *sp);
+ sp[nedges[i]] = END_NODE;
+ }
+ new_R[i] = sp;
+ end_R[i] = sp;
+ }
/* Store. */
for (i = 0; i < n; i++)
- if ((*R_arg)[i])
- for (j = 0; (*R_arg)[i][j] >= 0; ++j)
- {
- *end_R[(*R_arg)[i][j]] = i;
- ++end_R[(*R_arg)[i][j]];
- }
+ if (r[i])
+ for (j = 0; r[i][j] != END_NODE; ++j)
+ *end_R[r[i][j]]++ = i;
free (nedges);
free (end_R);
/* Free the input: it is replaced with the result. */
for (i = 0; i < n; i++)
- XFREE ((*R_arg)[i]);
- free (*R_arg);
+ free (r[i]);
+ free (r);
if (trace_flag & trace_sets)
{
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