X-Git-Url: https://git.saurik.com/bison.git/blobdiff_plain/22c2cbc078dc5243041d10f4e6e1e5ce1aca36cf..32e1e0a4865d64946a5497aff057d7be28c1cc3d:/src/print_graph.c

diff --git a/src/print_graph.c b/src/print_graph.c
index 6cab7234..7d81e2fe 100644
--- a/src/print_graph.c
+++ b/src/print_graph.c
@@ -19,8 +19,9 @@
    Boston, MA 02111-1307, USA.  */
 
 #include "system.h"
-#include "xalloc.h"
+#include "quotearg.h"
 #include "files.h"
+#include "symtab.h"
 #include "gram.h"
 #include "LR0.h"
 #include "lalr.h"
@@ -29,196 +30,184 @@
 #include "getargs.h"
 #include "state.h"
 #include "reader.h"
+#include "closure.h"
 #include "obstack.h"
 #include "print_graph.h"
 #include "vcg.h"
 
 static graph_t graph;
+static FILE *fgraph = NULL;
+
+
+/*----------------------------.
+| Construct the node labels.  |
+`----------------------------*/
 
-/* This part will construct the label of nodes. */
 static void
-print_core (int state)
+print_core (struct obstack *oout, state_t *state)
 {
   int i;
-  int k;
-  int rule;
-  core *statep;
-  short *sp;
-  short *sp1;
-
-  statep = state_table[state];
-  k = statep->nitems;
+  item_number_t *sitems = state->items;
+  int snritems   = state->nitems;
 
-  if (k == 0)
-    return;
-
-  obstack_sgrow(&graph_obstack, "\t\tlabel:\t\"");
+  /* Output all the items of a state, not only its kernel.  */
+  if (trace_flag)
+    {
+      closure (sitems, snritems);
+      sitems = itemset;
+      snritems = nritemset;
+    }
 
-  for (i = 0; i < k; i++)
+  obstack_fgrow1 (oout, "state %2d\n", state->number);
+  for (i = 0; i < snritems; i++)
     {
-      sp1 = sp = ritem + statep->items[i];
+      item_number_t *sp;
+      item_number_t *sp1;
+      int rule;
+
+      sp1 = sp = ritem + sitems[i];
 
-      while (*sp > 0)
+      while (*sp >= 0)
 	sp++;
 
       rule = -(*sp);
 
-      obstack_fgrow1(&graph_obstack, _("%d: "), rule);
-      obstack_fgrow1(&graph_obstack, " %s  ->  ", tags[rlhs[rule]]);
+      if (i)
+	obstack_1grow (oout, '\n');
+      obstack_fgrow1 (oout, " %s -> ",
+		      symbol_tag_get (rules[rule].lhs));
 
-      for (sp = ritem + rrhs[rule]; sp < sp1; sp++)
-	obstack_fgrow1(&graph_obstack, "%s ", tags[*sp]);
+      for (sp = rules[rule].rhs; sp < sp1; sp++)
+	obstack_fgrow1 (oout, "%s ", symbol_tag_get (symbols[*sp]));
 
-      obstack_1grow(&graph_obstack, '.');
+      obstack_1grow (oout, '.');
 
-      while (*sp > 0)
-	obstack_fgrow1(&graph_obstack, " %s", tags[*sp++]);
+      for (/* Nothing */; *sp >= 0; ++sp)
+	obstack_fgrow1 (oout, " %s", symbol_tag_get (symbols[*sp]));
 
-      obstack_sgrow(&graph_obstack, "\\n");
+      /* Experimental feature: display the lookaheads. */
+      if (trace_flag && state->nlookaheads)
+	{
+	  int j, k;
+	  int nlookaheads = 0;
+	  /* Look for lookaheads corresponding to this rule. */
+	  for (j = 0; j < state->nlookaheads; ++j)
+	    for (k = 0; k < ntokens; ++k)
+	      if (bitset_test (state->lookaheads[j], k)
+		  && state->lookaheads_rule[j]->number == rule)
+		nlookaheads++;
+	  if (nlookaheads)
+	    {
+	      obstack_sgrow (oout, "  [");
+	      for (j = 0; j < state->nlookaheads; ++j)
+		for (k = 0; k < ntokens; ++k)
+		  if (bitset_test (state->lookaheads[j], k)
+		      && state->lookaheads_rule[j]->number == rule)
+		    obstack_fgrow2 (oout, "%s%s",
+				    symbol_tag_get (symbols[k]),
+				    --nlookaheads ? ", " : "");
+	      obstack_sgrow (oout, "]");
+	    }
+	}
     }
-  obstack_sgrow(&graph_obstack, "\"\n");
 }
 
+
+/*---------------------------------------------------------------.
+| Output in graph_obstack edges specifications in incidence with |
+| current node.                                                  |
+`---------------------------------------------------------------*/
+
 static void
-print_actions (int state, node_t *node)
+print_actions (state_t *state, const char *node_name)
 {
   int i;
-  int k;
-  int state1;
-  int symbol;
-  shifts *shiftp;
-  errs *errp;
-  reductions *redp;
-  int rule;
-  static char buff[10];
-  edge_t edge;
-
-  shiftp = shift_table[state];
-  redp = reduction_table[state];
-  errp = err_table[state];
 
-  if (!shiftp && !redp)
-    {
-      if (final_state == state)
-	;//fprintf(f, "    $default\taccept\n");
-      else
-	;//fprintf(f, "    NO ACTIONS\n");
-      return;
-    }
+  shifts_t   *shiftp = state->shifts;
+  reductions *redp = state->reductions;
 
-  if (shiftp)
-    {
-      k = shiftp->nshifts;
-
-      for (i = 0; i < k; i++)
-	{
-	  if (!shiftp->shifts[i])
-	    continue;
-	  state1 = shiftp->shifts[i];
-	  symbol = accessing_symbol[state1];
-
-	  if (ISVAR (symbol))
-	    break;
-
-	  {
-	    new_edge (&edge);
-
-	    if (state > state1)
-	      edge.type = back_edge;
-	    open_edge (&edge, &graph_obstack);
-	    edge.sourcename = node->title;
-	    edge.targetname = buff;
-	    sprintf (edge.targetname, "%d", state1);
-	    edge.color = (symbol == 0) ? blue : red;
-	    edge.label = tags[symbol];
-	    output_edge (&edge, &graph_obstack);
-	    close_edge (&graph_obstack);
-	  }
-	}
-    }
-  else
-    {
-      i = 0;
-      k = 0;
-    }
-
-  if (errp)
-    {
-      int j, nerrs;
-
-      nerrs = errp->nerrs;
-
-      for (j = 0; j < nerrs; j++)
-	{
-	  if (!errp->errs[j])
-	    continue;
-	  symbol = errp->errs[j];
-	}
-    }
+  static char buff[10];
+  edge_t edge;
 
-  if (consistent[state] && redp)
-    {
-      rule = redp->rules[0];
-      symbol = rlhs[rule];
-    }
+  if (!shiftp->nshifts && !redp)
+    return;
 
-  if (i < k)
-    {
-      for (; i < k; i++)
-	{
-	  if (!shiftp->shifts[i])
-	    continue;
-	  state1 = shiftp->shifts[i];
-	  symbol = accessing_symbol[state1];
-
-	  new_edge (&edge);
-	  open_edge (&edge, &graph_obstack);
-	  edge.sourcename = node->title;
-	  edge.targetname = buff;
+  for (i = 0; i < shiftp->nshifts; i++)
+    if (!SHIFT_IS_DISABLED (shiftp, i))
+      {
+	state_number_t state1 = shiftp->shifts[i];
+	symbol_number_t symbol = states[state1]->accessing_symbol;
+
+	new_edge (&edge);
+
+	if (state->number > 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;
+	/* Shifts are blue, gotos are green, and error is red. */
+	if (SHIFT_IS_ERROR (shiftp, i))
 	  edge.color = red;
-	  sprintf (edge.targetname, "%d", state1);
-	  edge.label = tags[symbol];
-	  output_edge (&edge, &graph_obstack);
-	  close_edge (&graph_obstack);
-	}
-    }
+	else
+	  edge.color = SHIFT_IS_SHIFT(shiftp, i) ? blue : green;
+	edge.label = symbol_tag_get (symbols[symbol]);
+	output_edge (&edge, fgraph);
+	close_edge (fgraph);
+      }
 }
 
+
+/*-------------------------------------------------------------.
+| Output in FGRAPH the current node specifications and exiting |
+| edges.                                                       |
+`-------------------------------------------------------------*/
+
 static void
-print_state (int state)
+print_state (state_t *state)
 {
   static char name[10];
+  struct obstack node_obstack;
   node_t node;
 
+  /* The labels of the nodes are their the items.  */
+  obstack_init (&node_obstack);
   new_node (&node);
-  open_node (&graph_obstack);
-
-  sprintf(name, "%d", state);
+  sprintf (name, "%d", state->number);
   node.title = name;
-  output_node (&node, &graph_obstack);
+  print_core (&node_obstack, state);
+  obstack_1grow (&node_obstack, '\0');
+  node.label = obstack_finish (&node_obstack);
 
-  print_core (state);   /* node label */
+  open_node (fgraph);
+  output_node (&node, fgraph);
+  close_node (fgraph);
 
-  close_node (&graph_obstack);
+  /* Output the edges.  */
+  print_actions (state, name);
 
-  print_actions (state, &node);	/* edges */
+  obstack_free (&node_obstack, 0);
 }
 
 
 void
 print_graph (void)
 {
-  int i;
+  state_number_t i;
+
+  /* Output file.  */
+  fgraph = xfopen (spec_graph_file, "w");
 
-  if (!graph_flag)
-    return ;
   new_graph (&graph);
 
-  /* graph.smanhattan_edges = yes;
-     graph.manhattan_edges = yes; */
+#if 0
+  graph.smanhattan_edges = yes;
+  graph.manhattan_edges = yes;
+#endif
 
   graph.display_edge_labels = yes;
-  graph.layoutalgorithm = 0;
+  graph.layoutalgorithm = normal;
 
   graph.port_sharing = no;
   graph.finetuning = yes;
@@ -229,13 +218,16 @@ print_graph (void)
   graph.crossing_weight = median;
 
   /* Output graph options. */
-  open_graph (&graph_obstack);
-  output_graph (&graph, &graph_obstack);
+  open_graph (fgraph);
+  output_graph (&graph, fgraph);
 
+  /* Output nodes and edges. */
+  new_closure (nritems);
   for (i = 0; i < nstates; i++)
-      /* Output nodes & edges. */
-      print_state (i);
+    print_state (states[i]);
+  free_closure ();
 
   /* Close graph. */
-  close_graph (&graph, &graph_obstack);
+  close_graph (&graph, fgraph);
+  xfclose (fgraph);
 }