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1 <?php |
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2 /** |
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3 * Class for working with MO files |
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4 * |
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5 * @version $Id: mo.php 106 2009-04-23 19:48:22Z nbachiyski $ |
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6 * @package pomo |
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7 * @subpackage mo |
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8 */ |
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9 |
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10 require_once dirname(__FILE__) . '/translations.php'; |
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11 require_once dirname(__FILE__) . '/streams.php'; |
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12 |
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13 class MO extends Gettext_Translations { |
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14 |
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15 var $_nplurals = 2; |
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16 |
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17 /** |
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18 * Fills up with the entries from MO file $filename |
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19 * |
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20 * @param string $filename MO file to load |
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21 */ |
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22 function import_from_file($filename) { |
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23 $reader = new POMO_CachedIntFileReader($filename); |
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24 if (isset($reader->error)) { |
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25 return false; |
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26 } |
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27 return $this->import_from_reader($reader); |
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28 } |
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29 |
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30 function export_to_file($filename) { |
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31 $fh = fopen($filename, 'wb'); |
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32 if ( !$fh ) return false; |
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33 $entries = array_filter($this->entries, create_function('$e', 'return !empty($e->translations);')); |
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34 ksort($entries); |
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35 $magic = 0x950412de; |
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36 $revision = 0; |
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37 $total = count($entries) + 1; // all the headers are one entry |
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38 $originals_lenghts_addr = 28; |
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39 $translations_lenghts_addr = $originals_lenghts_addr + 8 * $total; |
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40 $size_of_hash = 0; |
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41 $hash_addr = $translations_lenghts_addr + 8 * $total; |
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42 $current_addr = $hash_addr; |
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43 fwrite($fh, pack('V*', $magic, $revision, $total, $originals_lenghts_addr, |
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44 $translations_lenghts_addr, $size_of_hash, $hash_addr)); |
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45 fseek($fh, $originals_lenghts_addr); |
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46 |
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47 // headers' msgid is an empty string |
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48 fwrite($fh, pack('VV', 0, $current_addr)); |
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49 $current_addr++; |
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50 $originals_table = chr(0); |
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51 |
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52 foreach($entries as $entry) { |
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53 $originals_table .= $this->export_original($entry) . chr(0); |
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54 $length = strlen($this->export_original($entry)); |
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55 fwrite($fh, pack('VV', $length, $current_addr)); |
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56 $current_addr += $length + 1; // account for the NULL byte after |
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57 } |
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58 |
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59 $exported_headers = $this->export_headers(); |
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60 fwrite($fh, pack('VV', strlen($exported_headers), $current_addr)); |
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61 $current_addr += strlen($exported_headers) + 1; |
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62 $translations_table = $exported_headers . chr(0); |
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63 |
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64 foreach($entries as $entry) { |
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65 $translations_table .= $this->export_translations($entry) . chr(0); |
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66 $length = strlen($this->export_translations($entry)); |
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67 fwrite($fh, pack('VV', $length, $current_addr)); |
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68 $current_addr += $length + 1; |
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69 } |
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70 |
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71 fwrite($fh, $originals_table); |
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72 fwrite($fh, $translations_table); |
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73 fclose($fh); |
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74 } |
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75 |
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76 function export_original($entry) { |
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77 //TODO: warnings for control characters |
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78 $exported = $entry->singular; |
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79 if ($entry->is_plural) $exported .= chr(0).$entry->plural; |
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80 if (!is_null($entry->context)) $exported = $entry->context . chr(4) . $exported; |
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81 return $exported; |
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82 } |
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83 |
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84 function export_translations($entry) { |
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85 //TODO: warnings for control characters |
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86 return implode(chr(0), $entry->translations); |
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87 } |
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88 |
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89 function export_headers() { |
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90 $exported = ''; |
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91 foreach($this->headers as $header => $value) { |
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92 $exported.= "$header: $value\n"; |
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93 } |
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94 return $exported; |
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95 } |
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96 |
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97 function get_byteorder($magic) { |
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98 |
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99 // The magic is 0x950412de |
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100 |
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101 // bug in PHP 5.0.2, see https://savannah.nongnu.org/bugs/?func=detailitem&item_id=10565 |
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102 $magic_little = (int) - 1794895138; |
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103 $magic_little_64 = (int) 2500072158; |
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104 // 0xde120495 |
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105 $magic_big = ((int) - 569244523) && 0xFFFFFFFF; |
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106 |
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107 if ($magic_little == $magic || $magic_little_64 == $magic) { |
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108 return 'little'; |
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109 } else if ($magic_big == $magic) { |
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110 return 'big'; |
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111 } else { |
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112 return false; |
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113 } |
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114 } |
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115 |
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116 function import_from_reader($reader) { |
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117 $reader->setEndian('little'); |
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118 $endian = MO::get_byteorder($reader->readint32()); |
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119 if (false === $endian) { |
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120 return false; |
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121 } |
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122 $reader->setEndian($endian); |
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123 |
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124 $revision = $reader->readint32(); |
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125 $total = $reader->readint32(); |
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126 // get addresses of array of lenghts and offsets for original string and translations |
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127 $originals_lenghts_addr = $reader->readint32(); |
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128 $translations_lenghts_addr = $reader->readint32(); |
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129 |
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130 $reader->seekto($originals_lenghts_addr); |
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131 $originals_lenghts = $reader->readint32array($total * 2); // each of |
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132 $reader->seekto($translations_lenghts_addr); |
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133 $translations_lenghts = $reader->readint32array($total * 2); |
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134 |
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135 $length = create_function('$i', 'return $i * 2 + 1;'); |
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136 $offset = create_function('$i', 'return $i * 2 + 2;'); |
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137 |
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138 for ($i = 0; $i < $total; ++$i) { |
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139 $reader->seekto($originals_lenghts[$offset($i)]); |
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140 $original = $reader->read($originals_lenghts[$length($i)]); |
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141 $reader->seekto($translations_lenghts[$offset($i)]); |
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142 $translation = $reader->read($translations_lenghts[$length($i)]); |
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143 if ('' == $original) { |
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144 $this->set_headers($this->make_headers($translation)); |
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145 } else { |
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146 $this->add_entry($this->make_entry($original, $translation)); |
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147 } |
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148 } |
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149 return true; |
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150 } |
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151 |
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152 /** |
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153 * @static |
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154 */ |
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155 function &make_entry($original, $translation) { |
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156 $args = array(); |
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157 // look for context |
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158 $parts = explode(chr(4), $original); |
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159 if (isset($parts[1])) { |
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160 $original = $parts[1]; |
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161 $args['context'] = $parts[0]; |
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162 } |
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163 // look for plural original |
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164 $parts = explode(chr(0), $original); |
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165 $args['singular'] = $parts[0]; |
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166 if (isset($parts[1])) { |
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167 $args['plural'] = $parts[1]; |
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168 } |
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169 // plural translations are also separated by \0 |
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170 $args['translations'] = explode(chr(0), $translation); |
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171 $entry = & new Translation_Entry($args); |
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172 return $entry; |
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173 } |
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174 |
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175 function select_plural_form($count) { |
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176 return $this->gettext_select_plural_form($count); |
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177 } |
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178 |
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179 function get_plural_forms_count() { |
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180 return $this->_nplurals; |
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181 } |
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182 |
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183 |
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184 } |
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185 ?> |