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1 | <?php |
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2 | |
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3 | /** |
4 | * i18n.php |
5 | * |
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6 | * Copyright (c) 1999-2003 The SquirrelMail Project Team |
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7 | * Licensed under the GNU GPL. For full terms see the file COPYING. |
8 | * |
9 | * This file contains variuos functions that are needed to do |
10 | * internationalization of SquirrelMail. |
11 | * |
12 | * Internally the output character set is used. Other characters are |
13 | * encoded using Unicode entities according to HTML 4.0. |
14 | * |
15 | * $Id$ |
16 | */ |
17 | |
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18 | require_once(SM_PATH . 'functions/global.php'); |
19 | |
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20 | /* Decodes a string to the internal encoding from the given charset */ |
21 | function charset_decode ($charset, $string) { |
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22 | global $languages, $squirrelmail_language, $default_charset; |
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23 | |
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24 | if (isset($languages[$squirrelmail_language]['XTRA_CODE']) && |
25 | function_exists($languages[$squirrelmail_language]['XTRA_CODE'])) { |
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26 | $string = $languages[$squirrelmail_language]['XTRA_CODE']('decode', $string); |
27 | } |
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28 | |
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29 | $charset = strtolower($charset); |
30 | |
31 | set_my_charset(); |
32 | |
33 | // Variables that allow to use functions without function_exist() calls |
34 | $use_php_recode=false; |
35 | $use_php_iconv=false; |
36 | |
37 | // Don't do conversion if charset is the same. |
38 | if ( $charset == strtolower($default_charset) ) |
39 | return htmlspecialchars($string); |
40 | |
41 | // catch iso-8859-8-i thing |
42 | if ( $charset == "iso-8859-8-i" ) |
43 | $charset = "iso-8859-8"; |
44 | |
45 | /* |
46 | * Recode converts html special characters automatically if you use |
47 | * 'charset..html' decoding. There is no documented way to put -d option |
48 | * into php recode function call. |
49 | */ |
50 | if ( $use_php_recode ) { |
51 | if ( $default_charset == "utf-8" ) { |
52 | // other charsets can be converted to utf-8 without loss. |
53 | // and output string is smaller |
54 | $string = recode_string($charset . "..utf-8",$string); |
55 | return htmlspecialchars($string); |
56 | } else { |
57 | $string = recode_string($charset . "..html",$string); |
58 | // recode does not convert single quote, htmlspecialchars does. |
59 | $string = str_replace("'", ''', $string); |
60 | return $string; |
61 | } |
62 | } |
63 | |
64 | // iconv functions does not have html target and can be used only with utf-8 |
65 | if ( $use_php_iconv && $default_charset=='utf-8') { |
66 | $string = iconv($charset,$default_charset,$string); |
67 | return htmlspecialchars($string); |
68 | } |
69 | |
70 | // If we don't use recode and iconv, we'll do it old way. |
71 | |
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72 | /* All HTML special characters are 7 bit and can be replaced first */ |
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73 | |
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74 | $string = htmlspecialchars ($string); |
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75 | |
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76 | /* controls cpu and memory intensive decoding cycles */ |
77 | $agresive_decoding = false; |
78 | |
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79 | if (ereg('iso-8859-([[:digit:]]+)', $charset, $res)) { |
80 | if ($res[1] == '1') { |
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81 | include_once(SM_PATH . 'functions/decode/iso8859-1.php'); |
82 | $ret = charset_decode_iso8859_1 ($string); |
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83 | } else if ($res[1] == '2') { |
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84 | include_once(SM_PATH . 'functions/decode/iso8859-2.php'); |
85 | $ret = charset_decode_iso8859_2 ($string); |
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86 | } else if ($res[1] == '3') { |
87 | include_once(SM_PATH . 'functions/decode/iso8859-3.php'); |
88 | $ret = charset_decode_iso8859_3 ($string); |
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89 | } else if ($res[1] == '4') { |
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90 | include_once(SM_PATH . 'functions/decode/iso8859-4.php'); |
91 | $ret = charset_decode_iso8859_4 ($string); |
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92 | } else if ($res[1] == '5') { |
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93 | include_once(SM_PATH . 'functions/decode/iso8859-5.php'); |
94 | $ret = charset_decode_iso8859_5 ($string); |
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95 | } else if ($res[1] == '6') { |
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96 | include_once(SM_PATH . 'functions/decode/iso8859-6.php'); |
97 | $ret = charset_decode_iso8859_6 ($string); |
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98 | } else if ($res[1] == '7') { |
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99 | include_once(SM_PATH . 'functions/decode/iso8859-7.php'); |
100 | $ret = charset_decode_iso8859_7 ($string); |
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101 | } else if ($res[1] == '8') { |
102 | include_once(SM_PATH . 'functions/decode/iso8859-8.php'); |
103 | $ret = charset_decode_iso8859_8 ($string); |
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104 | } else if ($res[1] == '9') { |
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105 | include_once(SM_PATH . 'functions/decode/iso8859-9.php'); |
106 | $ret = charset_decode_iso8859_9 ($string); |
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107 | } else if ($res[1] == '10') { |
108 | include_once(SM_PATH . 'functions/decode/iso8859-10.php'); |
109 | $ret = charset_decode_iso8859_10 ($string); |
110 | } else if ($res[1] == '11') { |
111 | include_once(SM_PATH . 'functions/decode/iso8859-11.php'); |
112 | $ret = charset_decode_iso8859_11 ($string); |
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113 | } else if ($res[1] == '13') { |
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114 | include_once(SM_PATH . 'functions/decode/iso8859-13.php'); |
115 | $ret = charset_decode_iso8859_13 ($string); |
116 | } else if ($res[1] == '14') { |
117 | include_once(SM_PATH . 'functions/decode/iso8859-14.php'); |
118 | $ret = charset_decode_iso8859_14 ($string); |
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119 | } else if ($res[1] == '15') { |
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120 | include_once(SM_PATH . 'functions/decode/iso8859-15.php'); |
121 | $ret = charset_decode_iso8859_15 ($string); |
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122 | } else if ($res[1] == '16') { |
123 | include_once(SM_PATH . 'functions/decode/iso8859-16.php'); |
124 | $ret = charset_decode_iso8859_16 ($string); |
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125 | } else { |
126 | $ret = charset_decode_iso_8859_default ($string); |
127 | } |
128 | } else if ($charset == 'ns_4551-1') { |
129 | $ret = charset_decode_ns_4551_1 ($string); |
130 | } else if ($charset == 'koi8-r') { |
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131 | include_once(SM_PATH . 'functions/decode/koi8-r.php'); |
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132 | $ret = charset_decode_koi8r ($string); |
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133 | } else if ($charset == 'koi8-u') { |
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134 | include_once(SM_PATH . 'functions/decode/koi8-u.php'); |
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135 | $ret = charset_decode_koi8u ($string); |
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136 | } else if ($charset == 'windows-1250') { |
137 | include_once(SM_PATH . 'functions/decode/cp1250.php'); |
138 | $ret = charset_decode_cp1250 ($string); |
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139 | } else if ($charset == 'windows-1251') { |
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140 | include_once(SM_PATH . 'functions/decode/cp1251.php'); |
141 | $ret = charset_decode_cp1251 ($string); |
142 | } else if ($charset == 'windows-1252') { |
143 | include_once(SM_PATH . 'functions/decode/cp1252.php'); |
144 | $ret = charset_decode_cp1252 ($string); |
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145 | } else if ($charset == 'windows-1253') { |
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146 | include_once(SM_PATH . 'functions/decode/cp1253.php'); |
147 | $ret = charset_decode_cp1253 ($string); |
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148 | } else if ($charset == 'windows-1254') { |
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149 | include_once(SM_PATH . 'functions/decode/cp1254.php'); |
150 | $ret = charset_decode_cp1254 ($string); |
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151 | } else if ($charset == 'windows-1255') { |
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152 | include_once(SM_PATH . 'functions/decode/cp1255.php'); |
153 | $ret = charset_decode_cp1255 ($string); |
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154 | } else if ($charset == 'windows-1256') { |
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155 | include_once(SM_PATH . 'functions/decode/cp1256.php'); |
156 | $ret = charset_decode_cp1256 ($string); |
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157 | } else if ($charset == 'windows-1257') { |
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158 | include_once(SM_PATH . 'functions/decode/cp1257.php'); |
159 | $ret = charset_decode_cp1257 ($string); |
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160 | } else if ($charset == 'windows-1258') { |
161 | include_once(SM_PATH . 'functions/decode/cp1258.php'); |
162 | $ret = charset_decode_cp1258 ($string); |
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163 | } else if ($charset == 'tis-620') { |
164 | include_once(SM_PATH . 'functions/decode/tis620.php'); |
165 | $ret = charset_decode_tis620 ($string); |
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166 | } else if ($charset == 'big5' and $agresive_decoding ) { |
167 | include_once(SM_PATH . 'functions/decode/big5.php'); |
168 | $ret = charset_decode_big5 ($string); |
169 | } else if ($charset == 'gb2312' and $agresive_decoding ) { |
170 | include_once(SM_PATH . 'functions/decode/gb2312.php'); |
171 | $ret = charset_decode_gb2312 ($string); |
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172 | } else if ($charset == 'utf-8') { |
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173 | include_once(SM_PATH . 'functions/decode/utf-8.php'); |
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174 | $ret = charset_decode_utf8 ($string); |
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175 | } else { |
176 | $ret = $string; |
177 | } |
178 | return( $ret ); |
179 | } |
180 | |
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181 | |
182 | /* Remove all 8 bit characters from all other ISO-8859 character sets */ |
183 | function charset_decode_iso_8859_default ($string) { |
184 | return (strtr($string, "\240\241\242\243\244\245\246\247". |
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185 | "\250\251\252\253\254\255\256\257". |
186 | "\260\261\262\263\264\265\266\267". |
187 | "\270\271\272\273\274\275\276\277". |
188 | "\300\301\302\303\304\305\306\307". |
189 | "\310\311\312\313\314\315\316\317". |
190 | "\320\321\322\323\324\325\326\327". |
191 | "\330\331\332\333\334\335\336\337". |
192 | "\340\341\342\343\344\345\346\347". |
193 | "\350\351\352\353\354\355\356\357". |
194 | "\360\361\362\363\364\365\366\367". |
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195 | "\370\371\372\373\374\375\376\377", |
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196 | "????????????????????????????????????????". |
197 | "????????????????????????????????????????". |
198 | "????????????????????????????????????????". |
199 | "????????")); |
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200 | |
201 | } |
202 | |
203 | /* |
204 | * This is the same as ISO-646-NO and is used by some |
205 | * Microsoft programs when sending Norwegian characters |
206 | */ |
207 | function charset_decode_ns_4551_1 ($string) { |
208 | /* |
209 | * These characters are: |
210 | * Latin capital letter AE |
211 | * Latin capital letter O with stroke |
212 | * Latin capital letter A with ring above |
213 | * and the same as small letters |
214 | */ |
215 |