1 | // |
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2 | // TextEncoding.cpp |
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3 | // |
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4 | // $Id: //poco/1.3/Foundation/src/TextEncoding.cpp#5 $ |
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5 | // |
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6 | // Library: Foundation |
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7 | // Package: Text |
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8 | // Module: TextEncoding |
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9 | // |
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10 | // Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH. |
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11 | // and Contributors. |
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12 | // |
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13 | // Permission is hereby granted, free of charge, to any person or organization |
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14 | // obtaining a copy of the software and accompanying documentation covered by |
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15 | // this license (the "Software") to use, reproduce, display, distribute, |
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16 | // execute, and transmit the Software, and to prepare derivative works of the |
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17 | // Software, and to permit third-parties to whom the Software is furnished to |
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18 | // do so, all subject to the following: |
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19 | // |
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20 | // The copyright notices in the Software and this entire statement, including |
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21 | // the above license grant, this restriction and the following disclaimer, |
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22 | // must be included in all copies of the Software, in whole or in part, and |
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23 | // all derivative works of the Software, unless such copies or derivative |
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24 | // works are solely in the form of machine-executable object code generated by |
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25 | // a source language processor. |
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26 | // |
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27 | // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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28 | // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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29 | // FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT |
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30 | // SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE |
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31 | // FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE, |
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32 | // ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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33 | // DEALINGS IN THE SOFTWARE. |
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34 | // |
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35 | |
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36 | |
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37 | #include "Poco/TextEncoding.h" |
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38 | #include "Poco/Exception.h" |
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39 | #include "Poco/String.h" |
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40 | #include "Poco/ASCIIEncoding.h" |
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41 | #include "Poco/Latin1Encoding.h" |
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42 | #include "Poco/Latin9Encoding.h" |
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43 | #include "Poco/UTF16Encoding.h" |
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44 | #include "Poco/UTF8Encoding.h" |
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45 | #include "Poco/Windows1252Encoding.h" |
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46 | #include "Poco/RWLock.h" |
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47 | #include "Poco/SingletonHolder.h" |
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48 | #include <map> |
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49 | |
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50 | |
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51 | namespace Poco { |
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52 | |
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53 | |
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54 | // |
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55 | // TextEncodingManager |
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56 | // |
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57 | |
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58 | |
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59 | class TextEncodingManager |
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60 | { |
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61 | public: |
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62 | TextEncodingManager() |
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63 | { |
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64 | TextEncoding::Ptr pUtf8Encoding(new UTF8Encoding); |
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65 | add(pUtf8Encoding, TextEncoding::GLOBAL); |
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66 | |
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67 | add(new ASCIIEncoding); |
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68 | add(new Latin1Encoding); |
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69 | add(new Latin9Encoding); |
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70 | add(pUtf8Encoding); |
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71 | add(new UTF16Encoding); |
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72 | add(new Windows1252Encoding); |
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73 | } |
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74 | |
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75 | ~TextEncodingManager() |
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76 | { |
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77 | } |
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78 | |
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79 | void add(TextEncoding::Ptr pEncoding) |
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80 | { |
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81 | add(pEncoding, pEncoding->canonicalName()); |
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82 | } |
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83 | |
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84 | void add(TextEncoding::Ptr pEncoding, const std::string& name) |
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85 | { |
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86 | RWLock::ScopedLock lock(_lock, true); |
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87 | |
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88 | _encodings[name] = pEncoding; |
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89 | } |
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90 | |
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91 | void remove(const std::string& name) |
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92 | { |
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93 | RWLock::ScopedLock lock(_lock, true); |
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94 | |
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95 | _encodings.erase(name); |
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96 | } |
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97 | |
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98 | TextEncoding::Ptr find(const std::string& name) const |
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99 | { |
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100 | RWLock::ScopedLock lock(_lock); |
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101 | |
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102 | EncodingMap::const_iterator it = _encodings.find(name); |
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103 | if (it != _encodings.end()) |
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104 | return it->second; |
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105 | |
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106 | for (it = _encodings.begin(); it != _encodings.end(); ++it) |
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107 | { |
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108 | if (it->second->isA(name)) |
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109 | return it->second; |
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110 | } |
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111 | return TextEncoding::Ptr(); |
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112 | } |
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113 | |
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114 | private: |
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115 | TextEncodingManager(const TextEncodingManager&); |
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116 | TextEncodingManager& operator = (const TextEncodingManager&); |
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117 | |
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118 | struct ILT |
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119 | { |
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120 | bool operator() (const std::string& s1, const std::string& s2) const |
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121 | { |
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122 | return Poco::icompare(s1, s2) < 0; |
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123 | } |
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124 | }; |
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125 | |
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126 | typedef std::map<std::string, TextEncoding::Ptr, ILT> EncodingMap; |
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127 | |
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128 | EncodingMap _encodings; |
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129 | mutable RWLock _lock; |
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130 | }; |
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131 | |
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132 | |
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133 | // |
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134 | // TextEncoding |
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135 | // |
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136 | |
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137 | |
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138 | const std::string TextEncoding::GLOBAL; |
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139 | |
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140 | |
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141 | TextEncoding::~TextEncoding() |
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142 | { |
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143 | } |
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144 | |
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145 | |
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146 | int TextEncoding::convert(const unsigned char* bytes) const |
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147 | { |
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148 | return static_cast<int>(*bytes); |
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149 | } |
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150 | |
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151 | |
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152 | int TextEncoding::convert(int ch, unsigned char* bytes, int length) const |
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153 | { |
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154 | return 0; |
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155 | } |
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156 | |
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157 | |
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158 | int TextEncoding::queryConvert(const unsigned char* bytes, int length) const |
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159 | { |
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160 | return (int) *bytes; |
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161 | } |
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162 | |
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163 | |
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164 | int TextEncoding::sequenceLength(const unsigned char* bytes, int length) const |
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165 | { |
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166 | return 1; |
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167 | } |
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168 | |
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169 | |
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170 | TextEncoding& TextEncoding::byName(const std::string& encodingName) |
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171 | { |
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172 | TextEncoding* pEncoding = manager().find(encodingName); |
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173 | if (pEncoding) |
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174 | return *pEncoding; |
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175 | else |
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176 | throw NotFoundException(encodingName); |
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177 | } |
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178 | |
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179 | |
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180 | TextEncoding::Ptr TextEncoding::find(const std::string& encodingName) |
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181 | { |
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182 | return manager().find(encodingName); |
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183 | } |
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184 | |
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185 | |
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186 | void TextEncoding::add(TextEncoding::Ptr pEncoding) |
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187 | { |
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188 | manager().add(pEncoding, pEncoding->canonicalName()); |
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189 | } |
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190 | |
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191 | |
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192 | void TextEncoding::add(TextEncoding::Ptr pEncoding, const std::string& name) |
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193 | { |
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194 | manager().add(pEncoding, name); |
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195 | } |
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196 | |
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197 | |
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198 | void TextEncoding::remove(const std::string& encodingName) |
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199 | { |
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200 | manager().remove(encodingName); |
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201 | } |
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202 | |
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203 | |
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204 | TextEncoding::Ptr TextEncoding::global(TextEncoding::Ptr encoding) |
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205 | { |
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206 | TextEncoding::Ptr prev = find(GLOBAL); |
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207 | add(encoding, GLOBAL); |
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208 | return prev; |
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209 | } |
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210 | |
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211 | |
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212 | TextEncoding& TextEncoding::global() |
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213 | { |
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214 | return byName(GLOBAL); |
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215 | } |
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216 | |
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217 | |
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218 | TextEncodingManager& TextEncoding::manager() |
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219 | { |
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220 | static SingletonHolder<TextEncodingManager> sh; |
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221 | return *sh.get(); |
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222 | } |
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223 | |
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224 | |
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225 | } // namespace Poco |
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