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diff --git a/storage/mroonga/lib/mrn_parameters_parser.hpp b/storage/mroonga/lib/mrn_parameters_parser.hpp
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+++ b/storage/mroonga/lib/mrn_parameters_parser.hpp
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+/* -*- c-basic-offset: 2 -*- */
+/*
+  Copyright(C) 2011-2013 Kentoku SHIBA
+  Copyright(C) 2011-2013 Kouhei Sutou <kou@clear-code.com>
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library 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
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1335  USA
+*/
+
+#ifndef MRN_PARAMETERS_PARSER_HPP_
+#define MRN_PARAMETERS_PARSER_HPP_
+
+#include <mrn_mysql.h>
+#include <my_list.h>
+
+namespace mrn {
+  class ParametersParser {
+  public:
+    ParametersParser(const char *input, unsigned int input_length);
+    ~ParametersParser();
+    void parse();
+    const char *operator[](const char *key);
+
+  private:
+    const char *input_;
+    unsigned int input_length_;
+
+    LIST *parameters_;
+
+    bool is_white_space(char character) {
+      switch (character) {
+      case ' ':
+      case '\r':
+      case '\n':
+      case '\t':
+        return true;
+        break;
+      default:
+        return false;
+        break;
+      }
+    };
+    const char *parse_value(const char *current, const char *end,
+                            const char *key, unsigned int key_length);
+  };
+}
+
+#endif /* MRN_PARAMETERS_PARSER_HPP_ */