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/* Output Graphviz specification of a state machine generated by Bison.
Copyright (C) 2006-2007, 2009-2010 Free Software Foundation, Inc.
This file is part of Bison, the GNU Compiler Compiler.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* Written by Paul Eggert and Satya Kiran Popuri. */
#include <config.h>
#include "system.h"
#include <quotearg.h>
#include "graphviz.h"
/* 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 *
quote (char const *name)
{
return quotearg_n_style (2, c_quoting_style, name);
}
void
start_graph (FILE *fout)
{
fputs ("digraph Automaton {\n", fout);
}
void
output_node (int id, char const *label, FILE *fout)
{
fprintf (fout, " %d [label=%s]\n", id, quote (label));
}
void
output_edge (int source, int destination, char const *label,
char const *style, FILE *fout)
{
fprintf (fout, " %d -> %d [style=%s", source, destination, style);
if (label)
fprintf (fout, " label=%s", quote (label));
fputs ("]\n", fout);
}
void
finish_graph (FILE *fout)
{
fputs ("}\n", fout);
}
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