X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/742e4900c8b05c8c1f56985288141c890f1e9c73..e1b74b92a02af45029e19ebd0d2628da3fd01759:/src/print_graph.c
diff --git a/src/print_graph.c b/src/print_graph.c
index 0ba50b8e..9d7da18a 100644
--- a/src/print_graph.c
+++ b/src/print_graph.c
@@ -1,23 +1,22 @@
-/* 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 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 . */
#include
#include "system.h"
@@ -31,15 +30,12 @@
#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;
/*----------------------------.
@@ -58,10 +54,10 @@ print_core (struct obstack *oout, state *s)
{
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;
@@ -75,10 +71,7 @@ print_core (struct obstack *oout, state *s)
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);
@@ -89,7 +82,8 @@ print_core (struct obstack *oout, state *s)
obstack_fgrow1 (oout, " %s", symbols[*sp]->tag);
/* Experimental feature: display the lookahead tokens. */
- if (report_flag & report_lookahead_tokens)
+ if (report_flag & report_lookahead_tokens
+ && item_number_is_rule_number (*sp1))
{
/* Find the reduction we are handling. */
reductions *reds = s->reductions;
@@ -120,17 +114,13 @@ print_core (struct obstack *oout, state *s)
`---------------------------------------------------------------*/
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++)
@@ -139,23 +129,18 @@ print_actions (state *s, const char *node_name)
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);
}
}
@@ -166,29 +151,19 @@ print_actions (state *s, const char *node_name)
`-------------------------------------------------------------*/
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);
}
@@ -196,32 +171,15 @@ void
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);
}