graphs: style: prefix state number with "state"

[bison.git] / src / graphviz.c

diff --git a/src/graphviz.c b/src/graphviz.c
index 1de93283c7ab754e5acb688a5b2d27093f76e02b..6498884ada5dfe56779ca1f506f570fc9923b53a 100644 (file)
--- a/src/graphviz.c
+++ b/src/graphviz.c
@@ -1,6 +1,6 @@
 /* Output Graphviz specification of a state machine generated by Bison.
 
-   Copyright (C) 2006-2007, 2009-2011 Free Software Foundation, Inc.
+   Copyright (C) 2006-2007, 2009-2012 Free Software Foundation, Inc.
 
    This file is part of Bison, the GNU Compiler Compiler.
 
@@ -30,7 +30,7 @@
 /* Return an unambiguous printable representation for NAME, suitable
    for C strings.  Use slot 2 since the user may use slots 0 and 1.  */
 
-static char const *
+static char *
 quote (char const *name)
 {
   return quotearg_n_style (2, c_quoting_style, name);
@@ -51,17 +51,18 @@ start_graph (FILE *fout)
            "digraph %s\n"
            "{\n",
            quote (grammar_file));
+  fprintf (fout, "node [shape=box]\n");
 }
 
 void
 output_node (int id, char const *label, FILE *fout)
 {
-  fprintf (fout, "  %d [label=%s]\n", id, quote (label));
+  fprintf (fout, "  %d [label=\"%s\"]\n", id, label);
 }
 
 void
 output_edge (int source, int destination, char const *label,
-            char const *style, FILE *fout)
+             char const *style, FILE *fout)
 {
   fprintf (fout, "  %d -> %d [style=%s", source, destination, style);
   if (label)
@@ -69,6 +70,14 @@ output_edge (int source, int destination, char const *label,
   fputs ("]\n", fout);
 }
 
+char const *
+escape (char const *name)
+{
+  char *q = quote (name);
+  q[strlen (q) - 1] = '\0';
+  return q + 1;
+}
+
 void
 finish_graph (FILE *fout)
 {