-/* Output a VCG description on generated parser, for Bison,
+/* Output a graph of the generated parser, for Bison.
- Copyright (C) 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+ Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009 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., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+#include <config.h>
#include "system.h"
#include <quotearg.h>
#include "files.h"
#include "getargs.h"
#include "gram.h"
+#include "graphviz.h"
#include "lalr.h"
#include "print_graph.h"
#include "reader.h"
#include "state.h"
#include "symtab.h"
-#include "vcg.h"
-
-static graph static_graph;
-static FILE *fgraph = NULL;
/*----------------------------.
{
closure (sitems, snritems);
sitems = itemset;
- snritems = nritemset;
+ snritems = nitemset;
}
- obstack_fgrow1 (oout, "state %2d\n", s->number);
+ obstack_fgrow1 (oout, "%d", s->number);
for (i = 0; i < snritems; i++)
{
item_number *sp;
r = item_number_as_rule_number (*sp);
- if (i)
- obstack_1grow (oout, '\n');
- obstack_fgrow1 (oout, " %s -> ",
- rules[r].lhs->tag);
+ obstack_fgrow1 (oout, "\n%s -> ", rules[r].lhs->tag);
for (sp = rules[r].rhs; sp < sp1; sp++)
obstack_fgrow1 (oout, "%s ", symbols[*sp]->tag);
for (/* Nothing */; *sp >= 0; ++sp)
obstack_fgrow1 (oout, " %s", symbols[*sp]->tag);
- /* Experimental feature: display the look-ahead tokens. */
- if (report_flag & report_look_ahead_tokens)
+ /* Experimental feature: display the lookahead tokens. */
+ if (report_flag & report_lookahead_tokens
+ && item_number_is_rule_number (*sp1))
{
/* Find the reduction we are handling. */
reductions *reds = s->reductions;
int redno = state_reduction_find (s, &rules[r]);
/* Print them if there are. */
- if (reds->look_ahead_tokens && redno != -1)
+ if (reds->lookahead_tokens && redno != -1)
{
bitset_iterator biter;
int k;
char const *sep = "";
obstack_sgrow (oout, "[");
- BITSET_FOR_EACH (biter, reds->look_ahead_tokens[redno], k, 0)
+ BITSET_FOR_EACH (biter, reds->lookahead_tokens[redno], k, 0)
{
obstack_fgrow2 (oout, "%s%s", sep, symbols[k]->tag);
sep = ", ";
`---------------------------------------------------------------*/
static void
-print_actions (state *s, const char *node_name)
+print_actions (state const *s, FILE *fgraph)
{
int i;
- transitions *trans = s->transitions;
- reductions *reds = s->reductions;
-
- static char buff[10];
- edge e;
+ transitions const *trans = s->transitions;
- if (!trans->num && !reds)
+ if (!trans->num && !s->reductions)
return;
for (i = 0; i < trans->num; i++)
state *s1 = trans->states[i];
symbol_number sym = s1->accessing_symbol;
- new_edge (&e);
-
- if (s->number > s1->number)
- e.type = back_edge;
- open_edge (&e, fgraph);
- /* The edge source is the current node. */
- e.sourcename = node_name;
- sprintf (buff, "%d", s1->number);
- e.targetname = buff;
- /* Shifts are blue, gotos are green, and error is red. */
- if (TRANSITION_IS_ERROR (trans, i))
- e.color = red;
- else
- e.color = TRANSITION_IS_SHIFT (trans, i) ? blue : green;
- e.label = symbols[sym]->tag;
- output_edge (&e, fgraph);
- close_edge (fgraph);
+ /* Shifts are solid, gotos are dashed, and error is dotted. */
+ char const *style =
+ (TRANSITION_IS_ERROR (trans, i) ? "dotted"
+ : TRANSITION_IS_SHIFT (trans, i) ? "solid"
+ : "dashed");
+
+ if (TRANSITION_IS_ERROR (trans, i)
+ && strcmp (symbols[sym]->tag, "error") != 0)
+ abort ();
+ output_edge (s->number, s1->number,
+ TRANSITION_IS_ERROR (trans, i) ? NULL : symbols[sym]->tag,
+ style, fgraph);
}
}
`-------------------------------------------------------------*/
static void
-print_state (state *s)
+print_state (state *s, FILE *fgraph)
{
- static char name[10];
struct obstack node_obstack;
- node n;
- /* The labels of the nodes are their the items. */
+ /* A node's label contains its items. */
obstack_init (&node_obstack);
- new_node (&n);
- sprintf (name, "%d", s->number);
- n.title = name;
print_core (&node_obstack, s);
obstack_1grow (&node_obstack, '\0');
- n.label = obstack_finish (&node_obstack);
-
- open_node (fgraph);
- output_node (&n, fgraph);
- close_node (fgraph);
+ output_node (s->number, obstack_finish (&node_obstack), fgraph);
+ obstack_free (&node_obstack, 0);
/* Output the edges. */
- print_actions (s, name);
-
- obstack_free (&node_obstack, 0);
+ print_actions (s, fgraph);
}
\f
print_graph (void)
{
state_number i;
-
- /* Output file. */
- fgraph = xfopen (spec_graph_file, "w");
-
- new_graph (&static_graph);
-
- static_graph.display_edge_labels = yes;
-
- static_graph.port_sharing = no;
- static_graph.finetuning = yes;
- static_graph.priority_phase = yes;
- static_graph.splines = yes;
-
- static_graph.crossing_weight = median;
-
- /* Output graph options. */
- open_graph (fgraph);
- output_graph (&static_graph, fgraph);
+ FILE *fgraph = xfopen (spec_graph_file, "w");
+ start_graph (fgraph);
/* Output nodes and edges. */
new_closure (nritems);
for (i = 0; i < nstates; i++)
- print_state (states[i]);
+ print_state (states[i], fgraph);
free_closure ();
- /* Close graph. */
- close_graph (&static_graph, fgraph);
+ finish_graph (fgraph);
xfclose (fgraph);
}
projects / bison.git / blobdiff