* src/state.h, src/state.c (shift_t, SHIFT_SYMBOL, SHIFT_IS_SHIFT)

[bison.git] / src / print_graph.c

diff --git a/src/print_graph.c b/src/print_graph.c
index 2570ab58d445806cd5b771ae2c02fb358867ec16..8e6cdb3df9cda93e4db79a343c6a943feef02350 100644 (file)
--- a/src/print_graph.c
+++ b/src/print_graph.c
@@ -38,55 +38,81 @@
 static graph_t graph;
 static FILE *fgraph = NULL;
 
-static inline const char *
-escape (const char *s)
-{
-  return quotearg_n_style (1, escape_quoting_style, s);
-}
 
+/*----------------------------.
+| Construct the node labels.  |
+`----------------------------*/
 
-/* This part will construct the label of nodes. */
 static void
-print_core (state_t *state, struct obstack *node_obstack)
+print_core (struct obstack *oout, state_t *state)
 {
   int i;
-  short *sitems = state->items;
-  int snitems   = state->nitems;
+  item_number_t *sitems = state->items;
+  int snritems   = state->nitems;
 
   /* Output all the items of a state, not only its kernel.  */
-  if (trace_flag)
+  if (report_flag & report_itemsets)
     {
-      closure (sitems, snitems);
+      closure (sitems, snritems);
       sitems = itemset;
-      snitems = nitemset;
+      snritems = nritemset;
     }
 
-  obstack_fgrow1 (node_obstack, "state %2d\n", state->number);
-  for (i = 0; i < snitems; i++)
+  obstack_fgrow1 (oout, "state %2d\n", state->number);
+  for (i = 0; i < snritems; i++)
     {
-      short *sp;
-      short *sp1;
-      int rule;
+      item_number_t *sp;
+      item_number_t *sp1;
+      rule_number_t rule;
 
       sp1 = sp = ritem + sitems[i];
 
       while (*sp >= 0)
        sp++;
 
-      rule = -(*sp);
+      rule = rule_number_of_item_number (*sp);
 
       if (i)
-       obstack_1grow (node_obstack, '\n');
-      obstack_fgrow1 (node_obstack, " %s -> ",
-                     escape (rules[rule].lhs->tag));
+       obstack_1grow (oout, '\n');
+      obstack_fgrow1 (oout, " %s -> ",
+                     symbol_tag_get (rules[rule].lhs));
 
       for (sp = rules[rule].rhs; sp < sp1; sp++)
-       obstack_fgrow1 (node_obstack, "%s ", escape (symbols[*sp]->tag));
+       obstack_fgrow1 (oout, "%s ", symbol_tag_get (symbols[*sp]));
 
-      obstack_1grow (node_obstack, '.');
+      obstack_1grow (oout, '.');
 
       for (/* Nothing */; *sp >= 0; ++sp)
-       obstack_fgrow1 (node_obstack, " %s", escape (symbols[*sp]->tag));
+       obstack_fgrow1 (oout, " %s", symbol_tag_get (symbols[*sp]));
+
+      /* Experimental feature: display the lookaheads. */
+      if ((report_flag & report_lookaheads)
+         && state->nlookaheads)
+       {
+         int j, k;
+         int nlookaheads = 0;
+         /* Look for lookaheads corresponding to this rule. */
+         for (j = 0; j < state->nlookaheads; ++j)
+           BITSET_EXECUTE (state->lookaheads[j], 0, k,
+           {
+             if (state->lookaheads_rule[j]->number == rule)
+               nlookaheads++;
+           });
+
+         if (nlookaheads)
+           {
+             obstack_sgrow (oout, "  [");
+             for (j = 0; j < state->nlookaheads; ++j)
+               BITSET_EXECUTE (state->lookaheads[j], 0, k,
+               {
+                 if (state->lookaheads_rule[j]->number == rule)
+                   obstack_fgrow2 (oout, "%s%s",
+                                   symbol_tag_get (symbols[k]),
+                                   --nlookaheads ? ", " : "");
+               });
+             obstack_sgrow (oout, "]");
+           }
+       }
     }
 }
 
@@ -101,20 +127,20 @@ print_actions (state_t *state, const char *node_name)
 {
   int i;
 
-  shifts   *shiftp = state->shifts;
-  reductions *redp = state->reductions;
+  transitions_t     *transitions = state->shifts;
+  reductions_t *redp = state->reductions;
 
   static char buff[10];
   edge_t edge;
 
-  if (!shiftp->nshifts && !redp)
+  if (!transitions->num && !redp)
     return;
 
-  for (i = 0; i < shiftp->nshifts; i++)
-    if (!SHIFT_IS_DISABLED (shiftp, i))
+  for (i = 0; i < transitions->num; i++)
+    if (!TRANSITION_IS_DISABLED (transitions, i))
       {
-       int state1 = shiftp->shifts[i];
-       int symbol = states[state1]->accessing_symbol;
+       state_number_t state1 = transitions->states[i];
+       symbol_number_t symbol = states[state1]->accessing_symbol;
 
        new_edge (&edge);
 
@@ -126,11 +152,11 @@ print_actions (state_t *state, const char *node_name)
        sprintf (buff, "%d", state1);
        edge.targetname = buff;
        /* Shifts are blue, gotos are green, and error is red. */
-       if (SHIFT_IS_ERROR (shiftp, i))
+       if (TRANSITION_IS_ERROR (transitions, i))
          edge.color = red;
        else
-         edge.color = SHIFT_IS_SHIFT(shiftp, i) ? blue : green;
-       edge.label = escape (symbols[symbol]->tag);
+         edge.color = TRANSITION_IS_SHIFT(transitions, i) ? blue : green;
+       edge.label = symbol_tag_get (symbols[symbol]);
        output_edge (&edge, fgraph);
        close_edge (fgraph);
       }
@@ -154,7 +180,7 @@ print_state (state_t *state)
   new_node (&node);
   sprintf (name, "%d", state->number);
   node.title = name;
-  print_core (state, &node_obstack);
+  print_core (&node_obstack, state);
   obstack_1grow (&node_obstack, '\0');
   node.label = obstack_finish (&node_obstack);
 
@@ -172,7 +198,7 @@ print_state (state_t *state)
 void
 print_graph (void)
 {
-  size_t i;
+  state_number_t i;
 
   /* Output file.  */
   fgraph = xfopen (spec_graph_file, "w");