-/* Output a VCG description on generated parser, for Bison,
+/* Output a graph of the generated parser, for Bison.
- Copyright (C) 2001, 2002 Free Software Foundation, Inc.
+ Copyright (C) 2001-2007, 2009-2015 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 <obstack.h>
-#include <quotearg.h>
-
#include "LR0.h"
#include "closure.h"
#include "complain.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;
/*----------------------------.
| Construct the node labels. |
`----------------------------*/
+/* Print the lhs of a rule in such a manner that there is no vertical
+ repetition, like in *.output files. */
+
static void
print_core (struct obstack *oout, state *s)
{
- int i;
- item_number *sitems = s->items;
- int snritems = s->nitems;
+ item_number const *sitems = s->items;
+ symbol *previous_lhs = NULL;
+ size_t i;
+ size_t snritems = s->nitems;
- /* Output all the items of a state, not only its kernel. */
+ /* Output all the items of a state, not just its kernel. */
if (report_flag & report_itemsets)
{
closure (sitems, snritems);
sitems = itemset;
- snritems = nritemset;
+ snritems = nitemset;
}
- obstack_fgrow1 (oout, "state %2d\n", s->number);
+ obstack_printf (oout, _("State %d"), s->number);
+ obstack_sgrow (oout, "\\n\\l");
for (i = 0; i < snritems; i++)
{
- item_number *sp;
- item_number *sp1;
- rule_number r;
-
- sp1 = sp = ritem + sitems[i];
+ item_number const *sp1 = ritem + sitems[i];
+ item_number const *sp = sp1;
+ rule *r;
- while (*sp >= 0)
- sp++;
+ while (0 <= *sp)
+ sp++;
- r = item_number_as_rule_number (*sp);
+ r = &rules[item_number_as_rule_number (*sp)];
- if (i)
- obstack_1grow (oout, '\n');
- obstack_fgrow1 (oout, " %s -> ",
- rules[r].lhs->tag);
+ obstack_printf (oout, "%3d ", r->number);
+ if (previous_lhs && UNIQSTR_EQ (previous_lhs->tag, r->lhs->tag))
+ obstack_printf (oout, "%*s| ",
+ (int) strlen (previous_lhs->tag), "");
+ else
+ obstack_printf (oout, "%s: ", escape (r->lhs->tag));
+ previous_lhs = r->lhs;
- for (sp = rules[r].rhs; sp < sp1; sp++)
- obstack_fgrow1 (oout, "%s ", symbols[*sp]->tag);
+ for (sp = r->rhs; sp < sp1; sp++)
+ obstack_printf (oout, "%s ", escape (symbols[*sp]->tag));
obstack_1grow (oout, '.');
- for (/* Nothing */; *sp >= 0; ++sp)
- obstack_fgrow1 (oout, " %s", symbols[*sp]->tag);
-
- /* Experimental feature: display the lookaheads. */
- if (report_flag & report_lookaheads)
- {
- /* 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->lookaheads && redno != -1)
- {
- bitset_iterator biter;
- int k;
- int not_first = 0;
- obstack_sgrow (oout, "[");
- BITSET_FOR_EACH (biter, reds->lookaheads[redno], k, 0)
- obstack_fgrow2 (oout, "%s%s",
- not_first++ ? ", " : "",
- symbols[k]->tag);
- obstack_sgrow (oout, "]");
- }
- }
+ if (0 <= *r->rhs)
+ for (/* Nothing */; *sp >= 0; ++sp)
+ obstack_printf (oout, " %s", escape (symbols[*sp]->tag));
+ else
+ obstack_printf (oout, " %%empty");
+
+ /* 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, r);
+
+ /* Print them if there are. */
+ if (reds->lookahead_tokens && redno != -1)
+ {
+ bitset_iterator biter;
+ int k;
+ char const *sep = "";
+ obstack_sgrow (oout, " [");
+ BITSET_FOR_EACH (biter, reds->lookahead_tokens[redno], k, 0)
+ {
+ obstack_sgrow (oout, sep);
+ obstack_sgrow (oout, escape (symbols[k]->tag));
+ sep = ", ";
+ }
+ obstack_1grow (oout, ']');
+ }
+ }
+ obstack_sgrow (oout, "\\l");
}
}
`---------------------------------------------------------------*/
static void
-print_actions (state *s, const char *node_name)
+print_actions (state const *s, FILE *fgraph)
{
+ transitions const *trans = s->transitions;
int i;
- transitions *trans = s->transitions;
- reductions *reds = s->reductions;
-
- static char buff[10];
- edge e;
-
- if (!trans->num && !reds)
+ if (!trans->num && !s->reductions)
return;
for (i = 0; i < trans->num; i++)
if (!TRANSITION_IS_DISABLED (trans, 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);
+ state *s1 = trans->states[i];
+ symbol_number sym = s1->accessing_symbol;
+
+ /* 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)
+ && STRNEQ (symbols[sym]->tag, "error"))
+ abort ();
+ output_edge (s->number, s1->number,
+ TRANSITION_IS_ERROR (trans, i) ? NULL : symbols[sym]->tag,
+ style, fgraph);
}
+ /* Display reductions. */
+ output_red (s, s->reductions, 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_finish0 (&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);
-
-#if 0
- static_graph.smanhattan_edges = yes;
- static_graph.manhattan_edges = yes;
-#endif
-
- static_graph.display_edge_labels = yes;
- static_graph.layoutalgorithm = normal;
-
- static_graph.port_sharing = no;
- static_graph.finetuning = yes;
- static_graph.long_straight_phase = 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