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diff --git a/gcc/escaped_string.h b/gcc/escaped_string.h
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+/* Shared escaped string class.
+   Copyright (C) 1999-2019 Free Software Foundation, Inc.
+
+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_ESCAPED_STRING_H
+#define GCC_ESCAPED_STRING_H
+
+#include <cstdlib>
+
+/* A class to handle converting a string that might contain
+   control characters, (eg newline, form-feed, etc), into one
+   in which contains escape sequences instead.  */
+
+class escaped_string
+{
+ public:
+  escaped_string () { m_owned = false; m_str = NULL; };
+  ~escaped_string () { if (m_owned) free (m_str); }
+  operator const char *() const { return m_str; }
+  void escape (const char *);
+ private:
+  escaped_string(const escaped_string&) {}
+  escaped_string& operator=(const escaped_string&) { return *this; }
+  char *m_str;
+  bool  m_owned;
+};
+
+#endif /* ! GCC_ESCAPED_STRING_H */