cpptoxml/parser/symbol.h

   1 /****************************************************************************
   2 **
   3 ** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
   4 ** Copyright (C) 2002-2005 Roberto Raggi <roberto@kdevelop.org>
   5 **
   6 ** This file is part of the Qt Script Generator project on Trolltech Labs.
   7 **
   8 ** This file may be used under the terms of the GNU General Public
   9 ** License version 2.0 as published by the Free Software Foundation
  10 ** and appearing in the file LICENSE.GPL included in the packaging of
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  13 ** http://www.trolltech.com/products/qt/opensource.html
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  15 ** If you are unsure which license is appropriate for your use, please
  16 ** review the following information:
  17 ** http://www.trolltech.com/products/qt/licensing.html or contact the
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  19 **
  20 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
  21 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  22 **
  23 ****************************************************************************/
  24
  25
  26 #ifndef SYMBOL_H
  27 #define SYMBOL_H
  28
  29 #include <QtCore/QString>
  30 #include <cstring>
  31
  32 #include <QtCore/QHash>
  33 #include <QtCore/QPair>
  34
  35 struct NameSymbol
  36 {
  37   const char *data;
  38   std::size_t count;
  39
  40   inline QString as_string() const
  41   {
  42     return QString::fromUtf8(data, (int) count);
  43   }
  44
  45   inline bool operator == (const NameSymbol &other) const
  46   {
  47     return count == other.count
  48       && std::strncmp(data, other.data, count) == 0;
  49   }
  50
  51 protected:
  52   inline NameSymbol() {}
  53   inline NameSymbol(const char *d, std::size_t c)
  54     : data(d), count(c) {}
  55
  56 private:
  57   void operator = (const NameSymbol &);
  58
  59   friend class NameTable;
  60 };
  61
  62 inline uint qHash(const NameSymbol &r)
  63 {
  64   uint hash_value = 0;
  65
  66   for (std::size_t i=0; i<r.count; ++i)
  67     hash_value = (hash_value << 5) - hash_value + r.data[i];
  68
  69   return hash_value;
  70 }
  71
  72 inline uint qHash(const QPair<const char*, std::size_t> &r)
  73 {
  74   uint hash_value = 0;
  75
  76   for (std::size_t i=0; i<r.second; ++i)
  77     hash_value = (hash_value << 5) - hash_value + r.first[i];
  78
  79   return hash_value;
  80 }
  81
  82 class NameTable
  83 {
  84 public:
  85   typedef QPair<const char *, std::size_t> KeyType;
  86   typedef QHash<KeyType, NameSymbol*> ContainerType;
  87
  88 public:
  89   NameTable() {}
  90
  91   ~NameTable()
  92   {
  93     qDeleteAll(_M_storage);
  94   }
  95
  96   inline const NameSymbol *findOrInsert(const char *str, std::size_t len)
  97   {
  98     KeyType key(str, len);
  99
 100     NameSymbol *name = _M_storage.value(key);
 101     if (!name)
 102       {
 103         name = new NameSymbol(str, len);
 104         _M_storage.insert(key, name);
 105       }
 106
 107     return name;
 108   }
 109
 110   inline std::size_t count() const
 111   {
 112     return _M_storage.size();
 113   }
 114
 115 private:
 116   ContainerType _M_storage;
 117
 118 private:
 119   NameTable(const NameTable &other);
 120   void operator = (const NameTable &other);
 121 };
 122
 123 #endif // SYMBOL_H
 124
 125 // kate: space-indent on; indent-width 2; replace-tabs on;