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diff --git a/src/PYPinyinArray.h b/src/PYPinyinArray.h
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+/* vim:set et ts=4 sts=4:
+ *
+ * ibus-pinyin - The Chinese PinYin engine for IBus
+ *
+ * Copyright (c) 2008-2010 Peng Huang <shawn.p.huang@gmail.com>
+ *
+ * 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 2, 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, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#ifndef __PY_PINYIN_ARRAY_H_
+#define __PY_PINYIN_ARRAY_H_
+
+#include <vector>
+#include "PYTypes.h"
+
+namespace PY {
+
+struct PinyinSegment {
+    const Pinyin *pinyin;
+    guint begin;
+    guint len;
+
+    PinyinSegment (const Pinyin *pinyin = NULL, guint begin = 0, guint len = 0)
+        : pinyin (pinyin), begin (begin), len (len) { }
+
+    operator const Pinyin * (void) const
+    {
+        return pinyin;
+    }
+
+    const Pinyin * operator-> (void) const
+    {
+        return pinyin;
+    }
+
+    gboolean operator == (const PinyinSegment & p) const
+    {
+        return (pinyin == p.pinyin) && (begin == p.begin) && (len == p.len);
+    }
+
+    gboolean operator == (const Pinyin *p) const
+    {
+        return pinyin == p;
+    }
+};
+
+class PinyinArray: public std::vector<PinyinSegment> {
+public:
+    PinyinArray (guint init_size = 0)
+    {
+        std::vector<PinyinSegment>::reserve (init_size);
+    }
+
+    void append (const Pinyin *pinyin, guint begin, guint len)
+    {
+        push_back (PinyinSegment (pinyin, begin, len));
+    }
+};
+
+};
+
+#endif