* src/bison.simple: Be sure to set YYSTACK_USE_ALLOCA.

[bison.git] / src / print_graph.c

diff --git a/src/print_graph.c b/src/print_graph.c
index 6cab7234a9c7bff2eb20da328f5647d7e0f7a485..a00434db52c4b092062c2fbd369135cbade59256 100644 (file)
--- a/src/print_graph.c
+++ b/src/print_graph.c
@@ -19,7 +19,6 @@
    Boston, MA 02111-1307, USA.  */
 
 #include "system.h"
    Boston, MA 02111-1307, USA.  */
 
 #include "system.h"

-#include "xalloc.h"

 #include "files.h"
 #include "gram.h"
 #include "LR0.h"
 #include "files.h"
 #include "gram.h"
 #include "LR0.h"


@@ -32,12 +31,24 @@
 #include "obstack.h"
 #include "print_graph.h"
 #include "vcg.h"
 #include "obstack.h"
 #include "print_graph.h"
 #include "vcg.h"

+#include "quotearg.h"

 
 static graph_t graph;
 
 static graph_t graph;

+static FILE *fgraph = NULL;
+
+static size_t node_output_size = 0;
+
+/* Return an unambiguous printable representated, allocated in slot 0,
+   for NAME, suitable for C strings.  */
+static char const *
+quote (char const *name)
+{
+  return quotearg_n_style (0, escape_quoting_style, name);
+}

 
 /* This part will construct the label of nodes. */
 static void
 
 /* This part will construct the label of nodes. */
 static void

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

 {
   int i;
   int k;
 {
   int i;
   int k;


@@ -52,10 +63,11 @@ print_core (int state)
   if (k == 0)
     return;
 
   if (k == 0)
     return;
 

-  obstack_sgrow(&graph_obstack, "\t\tlabel:\t\"");
-

   for (i = 0; i < k; i++)
     {
   for (i = 0; i < k; i++)
     {

+      if (i)
+       obstack_sgrow (node_obstack, "\\n");
+

       sp1 = sp = ritem + statep->items[i];
 
       while (*sp > 0)
       sp1 = sp = ritem + statep->items[i];
 
       while (*sp > 0)


@@ -63,24 +75,23 @@ print_core (int state)
 
       rule = -(*sp);
 
 
       rule = -(*sp);
 

-      obstack_fgrow1(&graph_obstack, _("%d: "), rule);
-      obstack_fgrow1(&graph_obstack, " %s  ->  ", tags[rlhs[rule]]);
+      obstack_fgrow1 (node_obstack, "%d: ", rule);
+      obstack_fgrow1 (node_obstack, " %s  ->  ", quote (tags[rlhs[rule]]));

 
       for (sp = ritem + rrhs[rule]; sp < sp1; sp++)
 
       for (sp = ritem + rrhs[rule]; sp < sp1; sp++)

-       obstack_fgrow1(&graph_obstack, "%s ", tags[*sp]);
+       obstack_fgrow1 (node_obstack, "%s ", quote (tags[*sp]));

 
 

-      obstack_1grow(&graph_obstack, '.');
+      obstack_1grow (node_obstack, '.');

 
       while (*sp > 0)
 
       while (*sp > 0)

-       obstack_fgrow1(&graph_obstack, " %s", tags[*sp++]);
-
-      obstack_sgrow(&graph_obstack, "\\n");
+       obstack_fgrow1 (node_obstack, " %s", quote (tags[*sp++]));

     }
     }

-  obstack_sgrow(&graph_obstack, "\"\n");

 }
 
 }
 

+/* Output in graph_obstack edges specifications in incidence with current 
+   node.  */

 static void
 static void

-print_actions (int state, node_t *node)
+print_actions (int state, const char *node_name, struct obstack *node_obstack)

 {
   int i;
   int k;
 {
   int i;
   int k;


@@ -100,9 +111,9 @@ print_actions (int state, node_t *node)
   if (!shiftp && !redp)
     {
       if (final_state == state)
   if (!shiftp && !redp)
     {
       if (final_state == state)

-       ;//fprintf(f, "    $default\taccept\n");
+       obstack_sgrow (node_obstack, "$default: accept");

       else
       else

-       ;//fprintf(f, "    NO ACTIONS\n");
+       obstack_sgrow (node_obstack, "NO ACTIONS");

       return;
     }
 
       return;
     }
 


@@ -125,14 +136,17 @@ print_actions (int state, node_t *node)
 
            if (state > state1)
              edge.type = back_edge;
 
            if (state > state1)
              edge.type = back_edge;

-           open_edge (&edge, &graph_obstack);
-           edge.sourcename = node->title;
+           open_edge (&edge, fgraph);
+           /* The edge source is the current node.  */
+           edge.sourcename = node_name;
+           sprintf (buff, "%d", state1);

            edge.targetname = buff;
            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);
+           edge.color = (symbol == 0) ? red : blue;
+           /* FIXME: Be aware that quote uses static memory.  The string
+              must be output immediately (which is the case here). */
+           edge.label = tags[symbol] ? quote (tags[symbol]) : NULL;
+           output_edge (&edge, fgraph);
+           close_edge (fgraph);

          }
        }
     }
          }
        }
     }


@@ -153,13 +167,25 @@ print_actions (int state, node_t *node)
          if (!errp->errs[j])
            continue;
          symbol = errp->errs[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_sgrow (node_obstack, "\\n");

     }
 
   if (consistent[state] && redp)
     {
       rule = redp->rules[0];
       symbol = rlhs[rule];
     }
 
   if (consistent[state] && redp)
     {
       rule = redp->rules[0];
       symbol = rlhs[rule];

+      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]);

     }
 
   if (i < k)
     }
 
   if (i < k)


@@ -172,36 +198,57 @@ print_actions (int state, node_t *node)
          symbol = accessing_symbol[state1];
 
          new_edge (&edge);
          symbol = accessing_symbol[state1];
 
          new_edge (&edge);

-         open_edge (&edge, &graph_obstack);
-         edge.sourcename = node->title;
+         open_edge (&edge, fgraph);
+         edge.sourcename = node_name;
+         sprintf (buff, "%d", state1);

          edge.targetname = buff;
          edge.color = red;
          edge.targetname = buff;
          edge.color = red;

-         sprintf (edge.targetname, "%d", state1);
-         edge.label = tags[symbol];
-         output_edge (&edge, &graph_obstack);
-         close_edge (&graph_obstack);
+         edge.label = tags[symbol] ? quote (tags[symbol]) : NULL;
+         output_edge (&edge, fgraph);
+         close_edge (fgraph);

        }
     }
 }
 
        }
     }
 }
 

+/* Output in GRAPH_OBSTACK the current node specifications and edges 
+   which go out from that node.  */

 static void
 print_state (int state)
 {
   static char name[10];
 static void
 print_state (int state)
 {
   static char name[10];

+  struct obstack node_obstack;

   node_t node;
 
   node_t node;
 

-  new_node (&node);
-  open_node (&graph_obstack);
-
-  sprintf(name, "%d", state);
-  node.title = name;
-  output_node (&node, &graph_obstack);
-
-  print_core (state);   /* node label */
-
-  close_node (&graph_obstack);
-
-  print_actions (state, &node);        /* edges */
+  obstack_init (&node_obstack);
+  new_node (&node);    /* Set node attributs default value.  */
+  sprintf (name, "%d", state);
+  node.title = name;   /* Give a name to the node.  */
+  
+  { 
+    /* Here we begin to compute the node label. */  
+    obstack_sgrow (&node_obstack, "\t\tlabel:\t\"");   /* Open Label  */
+    
+    /* Keep the size of NODE_OBSTACK before computing the label. It is 
+       useful to format the label.  */
+    node_output_size = obstack_object_size (&node_obstack);
+    
+    /* Compute the labels of nodes on the fly.  */
+    print_core (state, &node_obstack);
+    /* Compute edges and additionnal parts of node label.  */
+    print_actions (state, node.title, &node_obstack);
+    
+    obstack_sgrow (&node_obstack, "\"\n");             /* Close Label.  */
+  }    
+
+  open_node (fgraph);
+  /* Output a VCG formatted attributs list.  */
+  output_node (&node, fgraph);
+  /* Save the node label.  */
+  fwrite (obstack_base (&node_obstack), 
+         obstack_object_size (&node_obstack), 1, fgraph);
+  close_node (fgraph);
+
+  obstack_free (&node_obstack, 0);

 }
 \f
 
 }
 \f
 


@@ -209,16 +256,22 @@ void
 print_graph (void)
 {
   int i;
 print_graph (void)
 {
   int i;

-
+  

   if (!graph_flag)
   if (!graph_flag)

-    return ;
+    return;
+
+  /* Output file.  */
+  fgraph = xfopen (spec_graph_file, "w");
+

   new_graph (&graph);
 
   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.display_edge_labels = yes;

-  graph.layoutalgorithm = 0;
+  graph.layoutalgorithm = normal;

 
   graph.port_sharing = no;
   graph.finetuning = yes;
 
   graph.port_sharing = no;
   graph.finetuning = yes;


@@ -229,13 +282,14 @@ print_graph (void)
   graph.crossing_weight = median;
 
   /* Output graph options. */
   graph.crossing_weight = median;
 
   /* Output graph options. */

-  open_graph (&graph_obstack);
-  output_graph (&graph, &graph_obstack);
+  open_graph (fgraph);
+  output_graph (&graph, fgraph);

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

-      /* Output nodes & edges. */
-      print_state (i);
+    /* Output nodes & edges. */
+    print_state (i);

 
   /* Close graph. */
 
   /* Close graph. */

-  close_graph (&graph, &graph_obstack);
+  close_graph (&graph, fgraph);
+  xfclose (fgraph);

 }
 }