1 files changed, 61 insertions, 0 deletions
diff --git a/gprofng/src/QLParser.h b/gprofng/src/QLParser.h
new file mode 100644
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+++ b/gprofng/src/QLParser.h
@@ -0,0 +1,61 @@
+/* Copyright (C) 2021 Free Software Foundation, Inc.
+   Contributed by Oracle.
+
+   This file is part of GNU Binutils.
+
+   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, 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, write to the Free Software
+   Foundation, 51 Franklin Street - Fifth Floor, Boston,
+   MA 02110-1301, USA.  */
+
+#ifndef _QLPARSER_H
+#define _QLPARSER_H
+
+#include <sstream>
+#include <istream>
+#include <iostream>
+#include "Expression.h"
+
+/* This class contains parser inputs (a string, if non-NULL: if NULL, use cin),
+   and outputs (obtained via operator(), which resets the output
+   expression).  The destructor deletes the returned expression to allow
+   exception throws on syntax error to clean up properly.  */
+
+namespace QL
+{
+  struct Result
+  {
+    std::stringstream streamify;
+  public:
+    std::istream in;
+    Expression *out;
+
+    Result () : in (std::cin.rdbuf ()), out (NULL) { }
+    Result (const char *instr) : streamify (std::string (instr)),
+	in (streamify.rdbuf ()), out (NULL) { }
+
+    Expression *operator() ()
+    {
+      Expression *o = out;
+      out = NULL;
+      return o;
+    }
+
+    ~Result ()
+    {
+      delete out;
+    }
+  };
+};
+
+#endif /* _QLPARSER_H */