mirror of
https://git.savannah.gnu.org/git/bison.git
synced 2026-03-09 20:33:03 +00:00
a13121f759
The label text of nodes is centered "by default" (by the use of '\n' as a line feed). This gives bad readability to the grammar rules shown in state nodes, a left justification is much nicer. This is done by using '\l' as the line feed. In order to allow \l in the DOT file, changes to the quoting system seem necessary. * src/print_graph.c (print_core): Escape tokens here, instead of... * src/graphviz.c (output_node): Here... (escape): Using this, new. Signed-off-by: Akim Demaille <akim@lrde.epita.fr>
86 lines
2.2 KiB
C
86 lines
2.2 KiB
C
/* Output Graphviz specification of a state machine generated by Bison.
|
|
|
|
Copyright (C) 2006-2007, 2009-2012 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 "files.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 *
|
|
quote (char const *name)
|
|
{
|
|
return quotearg_n_style (2, c_quoting_style, name);
|
|
}
|
|
|
|
void
|
|
start_graph (FILE *fout)
|
|
{
|
|
fprintf (fout,
|
|
_("// Generated by %s.\n"
|
|
"// Report bugs to <%s>.\n"
|
|
"// Home page: <%s>.\n"
|
|
"\n"),
|
|
PACKAGE_STRING,
|
|
PACKAGE_BUGREPORT,
|
|
PACKAGE_URL);
|
|
fprintf (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, 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);
|
|
}
|
|
|
|
char const *
|
|
escape (char const *name)
|
|
{
|
|
char *q = quote (name);
|
|
q[strlen (q) - 1] = '\0';
|
|
return q + 1;
|
|
}
|
|
|
|
void
|
|
finish_graph (FILE *fout)
|
|
{
|
|
fputs ("}\n", fout);
|
|
}
|