Use ASCII for Sebastien Fricker's name.

[bison.git] / src / print_graph.c

diff --git a/src/print_graph.c b/src/print_graph.c
index 5a3ba52db72c514606546a5ebd8ec3bc5977a1d4..aba6902831e155eae002a17143ba3cfedbd6035d 100644 (file)
--- a/src/print_graph.c
+++ b/src/print_graph.c
@@ -1,5 +1,7 @@
-/* Output a VCG description on generated parser, for Bison,
-   Copyright 2001 Free Software Foundation, Inc.
+/* Output a graph of the generated parser, for Bison.
+
+   Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006 Free Software
+   Foundation, Inc.

 
    This file is part of Bison, the GNU Compiler Compiler.
 
 
    This file is part of Bison, the GNU Compiler Compiler.
 


@@ -15,62 +17,94 @@
 
    You should have received a copy of the GNU General Public License
    along with Bison; see the file COPYING.  If not, write to
 
    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.  */
+   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+   Boston, MA 02110-1301, USA.  */

 
 

+#include <config.h>

 #include "system.h"
 #include "system.h"

-#include "files.h"
-#include "gram.h"
+
+#include <quotearg.h>
+

 #include "LR0.h"
 #include "LR0.h"

-#include "lalr.h"
-#include "conflicts.h"
+#include "closure.h"

 #include "complain.h"
 #include "complain.h"

+#include "conflicts.h"
+#include "files.h"

 #include "getargs.h"
 #include "getargs.h"

-#include "state.h"
-#include "reader.h"
-#include "obstack.h"
+#include "gram.h"
+#include "graphviz.h"
+#include "lalr.h"

 #include "print_graph.h"
 #include "print_graph.h"

-#include "vcg.h"
+#include "reader.h"
+#include "state.h"
+#include "symtab.h"
+

 
 

-static graph_t graph;
-static FILE *fgraph = NULL;
+/*----------------------------.
+| Construct the node labels.  |
+`----------------------------*/

 
 

-/* This part will construct the label of nodes. */

 static void
 static void

-print_core (int state, struct obstack *node_obstack)
+print_core (struct obstack *oout, state *s)

 {
 {

-  int i;
-  core *statep = state_table[state].state;
+  size_t i;
+  item_number *sitems = s->items;
+  size_t snritems = s->nitems;

 
 

-  if (!statep->nitems)
-    return;
+  /* Output all the items of a state, not only its kernel.  */
+  if (report_flag & report_itemsets)
+    {
+      closure (sitems, snritems);
+      sitems = itemset;
+      snritems = nritemset;
+    }

 
 

-  for (i = 0; i < statep->nitems; i++)
+  obstack_fgrow1 (oout, "%d", s->number);
+  for (i = 0; i < snritems; i++)

     {
     {

-      short *sp;
-      short *sp1;
-      int rule;
+      item_number *sp;
+      item_number *sp1;
+      rule_number r;

 
 

-      sp1 = sp = ritem + statep->items[i];
+      sp1 = sp = ritem + sitems[i];

 
 

-      while (*sp > 0)
+      while (*sp >= 0)

        sp++;
 
        sp++;
 

-      rule = -(*sp);
+      r = item_number_as_rule_number (*sp);
+
+      obstack_fgrow1 (oout, "\n%s -> ", rules[r].lhs->tag);

 
 

-      if (i)
-       obstack_1grow (node_obstack, '\n');
-      obstack_fgrow1 (node_obstack, "%d: ", rule);
-      obstack_fgrow1 (node_obstack, " %s  ->  ",
-                     tags[rule_table[rule].lhs]);
+      for (sp = rules[r].rhs; sp < sp1; sp++)
+       obstack_fgrow1 (oout, "%s ", symbols[*sp]->tag);

 
 

-      for (sp = ritem + rule_table[rule].rhs; sp < sp1; sp++)
-       obstack_fgrow1 (node_obstack, "%s ", tags[*sp]);
+      obstack_1grow (oout, '.');

 
 

-      obstack_1grow (node_obstack, '.');
+      for (/* Nothing */; *sp >= 0; ++sp)
+       obstack_fgrow1 (oout, " %s", symbols[*sp]->tag);

 
 

-      for (/* Nothing */; *sp > 0; ++sp)
-       obstack_fgrow1 (node_obstack, " %s", tags[*sp]);
+      /* Experimental feature: display the lookahead tokens. */
+      if (report_flag & report_lookahead_tokens)
+       {
+         /* 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->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_fgrow2 (oout, "%s%s", sep, symbols[k]->tag);
+                 sep = ", ";
+               }
+             obstack_sgrow (oout, "]");
+           }
+       }

     }
 }
 
     }
 }
 


@@ -81,105 +115,34 @@ print_core (int state, struct obstack *node_obstack)
 `---------------------------------------------------------------*/
 
 static void
 `---------------------------------------------------------------*/
 
 static void

-print_actions (int state, const char *node_name)
+print_actions (state const *s, FILE *fgraph)

 {
   int i;
 
 {
   int i;
 

-  shifts   *shiftp = state_table[state].shift_table;
-  reductions *redp = state_table[state].reduction_table;
-#if 0
-  errs       *errp = err_table[state];
-#endif
-
-  static char buff[10];
-  edge_t edge;
+  transitions const *trans = s->transitions;

 
 

-  if (!shiftp->nshifts && !redp)
-    {
-#if 0
-      if (final_state == state)
-       obstack_sgrow (node_obstack, "$default: accept");
-      else
-       obstack_sgrow (node_obstack, "NO ACTIONS");
-#endif
-      return;
-    }
+  if (!trans->num && !s->reductions)
+    return;

 
 

-  for (i = 0; i < shiftp->nshifts; i++)
-    if (!SHIFT_IS_DISABLED (shiftp, i))
+  for (i = 0; i < trans->num; i++)
+    if (!TRANSITION_IS_DISABLED (trans, i))

       {
       {

-       int state1 = shiftp->shifts[i];
-       int symbol = state_table[state1].accessing_symbol;
-
-       new_edge (&edge);
-
-       if (state > state1)
-         edge.type = back_edge;
-       open_edge (&edge, fgraph);
-       /* The edge source is the current node.  */
-       edge.sourcename = node_name;
-       sprintf (buff, "%d", state1);
-       edge.targetname = buff;
-       edge.color = (symbol == 0) ? red : blue;
-       edge.label = tags[symbol];
-       output_edge (&edge, 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)
+           && strcmp (symbols[sym]->tag, "error") != 0)
+         abort ();
+       output_edge (s->number, s1->number,
+                    TRANSITION_IS_ERROR (trans, i) ? NULL : symbols[sym]->tag,
+                    style, fgraph);

       }
       }

-
-#if 0
-  if (errp)
-    {
-      int j, nerrs;
-
-      nerrs = errp->nerrs;
-
-      for (j = 0; j < nerrs; j++)
-       {
-         if (!errp->errs[j])
-           continue;
-         symbol = errp->errs[j];
-         /* If something has been added in the NODE_OBSTACK after
-            the declaration of the label, then we need a `\n'.
-         if (obstack_object_size (node_obstack) > node_output_size)
-           obstack_sgrow (node_obstack, "\n");
-           */
-         obstack_fgrow1 (node_obstack, _("%-4s\terror (nonassociative)"),
-                         tags[symbol]);
-       }
-      if (j > 0)
-       obstack_1grow (node_obstack, '\n');
-    }
-
-  if (state_table[state].consistent && redp)
-    {
-      rule = redp->rules[0];
-      symbol = rule_table[rule].lhs;
-      /*
-      if (obstack_object_size (node_obstack) > node_output_size)
-       obstack_sgrow (node_obstack, "\n");
-       */
-      obstack_fgrow2 (node_obstack, _("$default\treduce using rule %d (%s)"),
-                     rule, tags[symbol]);
-    }
-#endif
-
-  if (i < shiftp->nshifts)
-    for (; i < shiftp->nshifts; i++)
-      if (!SHIFT_IS_DISABLED (shiftp, i))
-       {
-         int state1 = shiftp->shifts[i];
-         int symbol = state_table[state1].accessing_symbol;
-
-         new_edge (&edge);
-         open_edge (&edge, fgraph);
-         edge.sourcename = node_name;
-         sprintf (buff, "%d", state1);
-         edge.targetname = buff;
-         edge.color = red;
-         edge.label = tags[symbol];
-         output_edge (&edge, fgraph);
-         close_edge (fgraph);
-       }

 }
 
 
 }
 
 


@@ -189,70 +152,35 @@ print_actions (int state, const char *node_name)
 `-------------------------------------------------------------*/
 
 static void
 `-------------------------------------------------------------*/
 
 static void

-print_state (int state)
+print_state (state *s, FILE *fgraph)

 {
 {

-  static char name[10];

   struct obstack node_obstack;
   struct obstack node_obstack;

-  node_t node;

 
 

-  /* The labels of the nodes are their the items.  */
+  /* A node's label contains its items.  */

   obstack_init (&node_obstack);
   obstack_init (&node_obstack);

-  new_node (&node);
-  sprintf (name, "%d", state);
-  node.title = name;
-  print_core (state, &node_obstack);
+  print_core (&node_obstack, s);

   obstack_1grow (&node_obstack, '\0');
   obstack_1grow (&node_obstack, '\0');

-  node.label = obstack_finish (&node_obstack);
-
-  open_node (fgraph);
-  output_node (&node, fgraph);
-  close_node (fgraph);
+  output_node (s->number, obstack_finish (&node_obstack), fgraph);
+  obstack_free (&node_obstack, 0);

 
   /* Output the edges.  */
 
   /* Output the edges.  */

-  print_actions (state, name);
-
-  obstack_free (&node_obstack, 0);
+  print_actions (s, fgraph);

 }
 \f
 
 void
 print_graph (void)
 {
 }
 \f
 
 void
 print_graph (void)
 {

-  int i;
-
-  if (!graph_flag)
-    return;
-
-  /* Output file.  */
-  fgraph = xfopen (spec_graph_file, "w");
-
-  new_graph (&graph);
-
-#if 0
-  graph.smanhattan_edges = yes;
-  graph.manhattan_edges = yes;
-#endif
-
-  graph.display_edge_labels = yes;
-  graph.layoutalgorithm = normal;
-
-  graph.port_sharing = no;
-  graph.finetuning = yes;
-  graph.straight_phase = yes;
-  graph.priority_phase = yes;
-  graph.splines = yes;
-
-  graph.crossing_weight = median;
-
-  /* Output graph options. */
-  open_graph (fgraph);
-  output_graph (&graph, fgraph);
+  state_number i;
+  FILE *fgraph = xfopen (spec_graph_file, "w");
+  start_graph (fgraph);

 
   /* Output nodes and edges. */
 
   /* Output nodes and edges. */

+  new_closure (nritems);

   for (i = 0; i < nstates; i++)
   for (i = 0; i < nstates; i++)

-    print_state (i);
+    print_state (states[i], fgraph);
+  free_closure ();

 
 

-  /* Close graph. */
-  close_graph (&graph, fgraph);
+  finish_graph (fgraph);

   xfclose (fgraph);
 }
   xfclose (fgraph);
 }