1 | // |
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2 | // TextConverter.cpp |
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3 | // |
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4 | // $Id: //poco/1.3/Foundation/src/TextConverter.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: TextConverter |
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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/TextConverter.h> |
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38 | #include <Poco/TextIterator.h> |
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39 | #include <Poco/TextEncoding.h> |
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40 | |
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41 | |
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42 | namespace { |
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43 | int nullTransform(int ch) |
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44 | { |
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45 | return ch; |
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46 | } |
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47 | } |
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48 | |
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49 | |
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50 | namespace Poco { |
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51 | |
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52 | |
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53 | TextConverter::TextConverter(const TextEncoding& inEncoding, const TextEncoding& outEncoding, int defaultChar): |
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54 | _inEncoding(inEncoding), |
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55 | _outEncoding(outEncoding), |
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56 | _defaultChar(defaultChar) |
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57 | { |
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58 | } |
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59 | |
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60 | |
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61 | TextConverter::~TextConverter() |
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62 | { |
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63 | } |
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64 | |
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65 | |
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66 | int TextConverter::convert(const std::string& source, std::string& destination, Transform trans) |
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67 | { |
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68 | int errors = 0; |
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69 | TextIterator it(source, _inEncoding); |
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70 | TextIterator end(source); |
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71 | unsigned char buffer[TextEncoding::MAX_SEQUENCE_LENGTH]; |
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72 | |
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73 | while (it != end) |
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74 | { |
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75 | int c = *it; |
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76 | if (c == -1) { ++errors; c = _defaultChar; } |
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77 | c = trans(c); |
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78 | int n = _outEncoding.convert(c, buffer, sizeof(buffer)); |
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79 | if (n == 0) n = _outEncoding.convert(_defaultChar, buffer, sizeof(buffer)); |
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80 | poco_assert (n <= sizeof(buffer)); |
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81 | destination.append((const char*) buffer, n); |
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82 | ++it; |
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83 | } |
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84 | return errors; |
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85 | } |
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86 | |
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87 | |
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88 | int TextConverter::convert(const void* source, int length, std::string& destination, Transform trans) |
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89 | { |
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90 | poco_check_ptr (source); |
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91 | |
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92 | int errors = 0; |
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93 | const unsigned char* it = (const unsigned char*) source; |
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94 | const unsigned char* end = (const unsigned char*) source + length; |
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95 | unsigned char buffer[TextEncoding::MAX_SEQUENCE_LENGTH]; |
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96 | |
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97 | while (it < end) |
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98 | { |
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99 | int n = _inEncoding.queryConvert(it, 1); |
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100 | int uc; |
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101 | int read = 1; |
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102 | |
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103 | while (-1 > n && (end - it) >= -n) |
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104 | { |
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105 | read = -n; |
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106 | n = _inEncoding.queryConvert(it, read); |
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107 | } |
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108 | |
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109 | if (-1 > n) |
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110 | { |
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111 | it = end; |
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112 | } |
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113 | else |
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114 | { |
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115 | it += read; |
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116 | } |
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117 | |
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118 | if (-1 >= n) |
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119 | { |
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120 | uc = _defaultChar; |
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121 | ++errors; |
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122 | } |
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123 | else |
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124 | { |
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125 | uc = n; |
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126 | } |
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127 | |
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128 | uc = trans(uc); |
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129 | n = _outEncoding.convert(uc, buffer, sizeof(buffer)); |
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130 | if (n == 0) n = _outEncoding.convert(_defaultChar, buffer, sizeof(buffer)); |
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131 | poco_assert (n <= sizeof(buffer)); |
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132 | destination.append((const char*) buffer, n); |
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133 | } |
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134 | return errors; |
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135 | } |
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136 | |
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137 | |
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138 | int TextConverter::convert(const std::string& source, std::string& destination) |
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139 | { |
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140 | return convert(source, destination, nullTransform); |
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141 | } |
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142 | |
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143 | |
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144 | int TextConverter::convert(const void* source, int length, std::string& destination) |
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145 | { |
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146 | return convert(source, length, destination, nullTransform); |
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147 | } |
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148 | |
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149 | |
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150 | } // namespace Poco |
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