This patch adds a simple wrapper class to make it easier to
write human-readable .dot files.
gcc/ChangeLog:
* analyzer/graphviz.cc: New file.
* analyzer/graphviz.h: New file.
---
gcc/analyzer/graphviz.cc | 81 ++++++++++++++++++++++++++++++++++++++++++++++++
gcc/analyzer/graphviz.h | 50 ++++++++++++++++++++++++++++++
2 files changed, 131 insertions(+)
create mode 100644 gcc/analyzer/graphviz.cc
create mode 100644 gcc/analyzer/graphviz.h
diff --git a/gcc/analyzer/graphviz.cc b/gcc/analyzer/graphviz.cc
new file mode 100644
index 0000000..46e7194
--- /dev/null
+++ b/gcc/analyzer/graphviz.cc
@@ -0,0 +1,81 @@
+/* Helper code for graphviz output.
+ Copyright (C) 2019 Free Software Foundation, Inc.
+ Contributed by David Malcolm <dmalc...@redhat.com>.
+
+This file is part of GCC.
+
+GCC 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, or (at your option)
+any later version.
+
+GCC 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 GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
+
+#include "config.h"
+#include "gcc-plugin.h"
+#include "system.h"
+#include "coretypes.h"
+#include "analyzer/graphviz.h"
+
+/* graphviz_out's ctor, wrapping PP. */
+
+graphviz_out::graphviz_out (pretty_printer *pp)
+: m_pp (pp),
+ m_indent (0)
+{
+}
+
+/* Formatted print of FMT. */
+
+void
+graphviz_out::print (const char *fmt, ...)
+{
+ text_info text;
+ va_list ap;
+
+ va_start (ap, fmt);
+ text.err_no = errno;
+ text.args_ptr = ≈
+ text.format_spec = fmt;
+ pp_format (m_pp, &text);
+ pp_output_formatted_text (m_pp);
+ va_end (ap);
+}
+
+/* Formatted print of FMT. The text is indented by the current
+ indent, and a newline is added. */
+
+void
+graphviz_out::println (const char *fmt, ...)
+{
+ text_info text;
+ va_list ap;
+
+ write_indent ();
+
+ va_start (ap, fmt);
+ text.err_no = errno;
+ text.args_ptr = ≈
+ text.format_spec = fmt;
+ pp_format (m_pp, &text);
+ pp_output_formatted_text (m_pp);
+ va_end (ap);
+
+ pp_newline (m_pp);
+}
+
+/* Print the current indent to the underlying pp. */
+
+void
+graphviz_out::write_indent ()
+{
+ for (int i = 0; i < m_indent * 2; ++i)
+ pp_space (m_pp);
+}
diff --git a/gcc/analyzer/graphviz.h b/gcc/analyzer/graphviz.h
new file mode 100644
index 0000000..d097834
--- /dev/null
+++ b/gcc/analyzer/graphviz.h
@@ -0,0 +1,50 @@
+/* Helper code for graphviz output.
+ Copyright (C) 2019 Free Software Foundation, Inc.
+ Contributed by David Malcolm <dmalc...@redhat.com>.
+
+This file is part of GCC.
+
+GCC 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, or (at your option)
+any later version.
+
+GCC 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 GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
+
+#ifndef GCC_ANALYZER_GRAPHVIZ_H
+#define GCC_ANALYZER_GRAPHVIZ_H
+
+#include "pretty-print.h" /* for ATTRIBUTE_GCC_PPDIAG. */
+
+/* A class for writing .dot output to a pretty_printer with
+ indentation to show nesting. */
+
+class graphviz_out {
+ public:
+ graphviz_out (pretty_printer *pp);
+
+ void print (const char *fmt, ...)
+ ATTRIBUTE_GCC_PPDIAG(2,3);
+ void println (const char *fmt, ...)
+ ATTRIBUTE_GCC_PPDIAG(2,3);
+
+ void indent () { m_indent++; }
+ void outdent () { m_indent--; }
+
+ void write_indent ();
+
+ pretty_printer *get_pp () const { return m_pp; }
+
+ private:
+ pretty_printer *m_pp;
+ int m_indent;
+};
+
+#endif /* GCC_ANALYZER_GRAPHVIZ_H */
--
1.8.5.3
