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1 /****************************************************************************
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2 **
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3 ** Copyright (C) 1992-2008 Nokia. All rights reserved.
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4 ** Copyright (C) 2002-2005 Roberto Raggi <roberto@kdevelop.org>
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5 **
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6 ** This file is part of Qt Jambi.
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7 **
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8 ** * Commercial Usage
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9 * Licensees holding valid Qt Commercial licenses may use this file in
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10 * accordance with the Qt Commercial License Agreement provided with the
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11 * Software or, alternatively, in accordance with the terms contained in
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12 * a written agreement between you and Nokia.
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13 *
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14 *
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15 * GNU General Public License Usage
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16 * Alternatively, this file may be used under the terms of the GNU
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17 * General Public License versions 2.0 or 3.0 as published by the Free
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18 * Software Foundation and appearing in the file LICENSE.GPL included in
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19 * the packaging of this file. Please review the following information
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20 * to ensure GNU General Public Licensing requirements will be met:
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21 * http://www.fsf.org/licensing/licenses/info/GPLv2.html and
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22 * http://www.gnu.org/copyleft/gpl.html. In addition, as a special
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23 * exception, Nokia gives you certain additional rights. These rights
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24 * are described in the Nokia Qt GPL Exception version 1.2, included in
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25 * the file GPL_EXCEPTION.txt in this package.
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26 *
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27 * Qt for Windows(R) Licensees
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28 * As a special exception, Nokia, as the sole copyright holder for Qt
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29 * Designer, grants users of the Qt/Eclipse Integration plug-in the
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30 * right for the Qt/Eclipse Integration to link to functionality
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31 * provided by Qt Designer and its related libraries.
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32 *
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33 *
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34 * If you are unsure which license is appropriate for your use, please
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35 * contact the sales department at qt-sales@nokia.com.
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36
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37 **
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38 ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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39 ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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40 **
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41 ****************************************************************************/
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42
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43
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44 #ifndef SYMBOL_H
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45 #define SYMBOL_H
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46
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47 #include <QtCore/QString>
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48 #include <cstring>
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49
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50 #include <QtCore/QHash>
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51 #include <QtCore/QPair>
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52
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53 struct NameSymbol
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54 {
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55 const char *data;
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56 std::size_t count;
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57
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58 inline QString as_string() const
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59 {
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60 return QString::fromUtf8(data, (int) count);
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61 }
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62
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63 inline bool operator == (const NameSymbol &other) const
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64 {
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65 return count == other.count
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66 && std::strncmp(data, other.data, count) == 0;
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67 }
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68
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69 protected:
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70 inline NameSymbol() {}
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71 inline NameSymbol(const char *d, std::size_t c)
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72 : data(d), count(c) {}
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73
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74 private:
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75 void operator = (const NameSymbol &);
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76
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77 friend class NameTable;
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78 };
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79
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80 inline uint qHash(const NameSymbol &r)
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81 {
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82 uint hash_value = 0;
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83
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84 for (std::size_t i=0; i<r.count; ++i)
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85 hash_value = (hash_value << 5) - hash_value + r.data[i];
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86
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87 return hash_value;
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88 }
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89
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90 inline uint qHash(const QPair<const char*, std::size_t> &r)
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91 {
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92 uint hash_value = 0;
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93
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94 for (std::size_t i=0; i<r.second; ++i)
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95 hash_value = (hash_value << 5) - hash_value + r.first[i];
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96
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97 return hash_value;
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98 }
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99
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100 class NameTable
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101 {
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102 public:
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103 typedef QPair<const char *, std::size_t> KeyType;
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104 typedef QHash<KeyType, NameSymbol*> ContainerType;
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105
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106 public:
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107 NameTable() {}
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108
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109 ~NameTable()
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110 {
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111 qDeleteAll(_M_storage);
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112 }
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113
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114 inline const NameSymbol *findOrInsert(const char *str, std::size_t len)
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115 {
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116 KeyType key(str, len);
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117
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118 NameSymbol *name = _M_storage.value(key);
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119 if (!name)
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120 {
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121 name = new NameSymbol(str, len);
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122 _M_storage.insert(key, name);
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123 }
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124
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125 return name;
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126 }
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127
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128 inline std::size_t count() const
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129 {
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130 return _M_storage.size();
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131 }
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132
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133 private:
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134 ContainerType _M_storage;
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135
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136 private:
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137 NameTable(const NameTable &other);
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138 void operator = (const NameTable &other);
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139 };
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140
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141 #endif // SYMBOL_H
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142
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143 // kate: space-indent on; indent-width 2; replace-tabs on;
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