1 | <?php |
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2 | /* ***** BEGIN LICENSE BLOCK ***** |
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3 | * Version: NPL 1.1/GPL 2.0/LGPL 2.1 |
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4 | * |
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5 | * The contents of this file are subject to the Netscape Public License |
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6 | * Version 1.1 (the "License"); you may not use this file except in |
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7 | * compliance with the License. You may obtain a copy of the License at |
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8 | * http://www.mozilla.org/NPL/ |
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9 | * |
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10 | * Software distributed under the License is distributed on an "AS IS" basis, |
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11 | * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License |
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12 | * for the specific language governing rights and limitations under the |
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13 | * License. |
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14 | * |
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15 | * The Original Code is Mozilla Communicator client code. |
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16 | * |
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17 | * The Initial Developer of the Original Code is |
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18 | * Netscape Communications Corporation. |
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19 | * Portions created by the Initial Developer are Copyright (C) 1998 |
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20 | * the Initial Developer. All Rights Reserved. |
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21 | * |
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22 | * Contributor(s): |
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23 | * Henri Sivonen, hsivonen@iki.fi |
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24 | * |
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25 | * |
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26 | * Alternatively, the contents of this file may be used under the terms of |
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27 | * either the GNU General Public License Version 2 or later (the "GPL"), or |
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28 | * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), |
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29 | * in which case the provisions of the GPL or the LGPL are applicable instead |
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30 | * of those above. If you wish to allow use of your version of this file only |
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31 | * under the terms of either the GPL or the LGPL, and not to allow others to |
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32 | * use your version of this file under the terms of the NPL, indicate your |
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33 | * decision by deleting the provisions above and replace them with the notice |
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34 | * and other provisions required by the GPL or the LGPL. If you do not delete |
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35 | * the provisions above, a recipient may use your version of this file under |
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36 | * the terms of any one of the NPL, the GPL or the LGPL. |
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37 | * |
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38 | * ***** END LICENSE BLOCK ***** */ |
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39 | |
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40 | /* |
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41 | * For the original C++ code, see |
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42 | * http://lxr.mozilla.org/seamonkey/source/intl/uconv/src/nsUTF8ToUnicode.cpp |
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43 | * http://lxr.mozilla.org/seamonkey/source/intl/uconv/src/nsUnicodeToUTF8.cpp |
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44 | * |
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45 | * The latest version of this file can be obtained from |
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46 | * http://iki.fi/hsivonen/php-utf8/ |
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47 | * |
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48 | * Version 1.0, 2003-05-30 |
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49 | */ |
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50 | |
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51 | /** |
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52 | * Takes an UTF-8 string and returns an array of ints representing the |
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53 | * Unicode characters. Astral planes are supported ie. the ints in the |
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54 | * output can be > 0xFFFF. Occurrances of the BOM are ignored. Surrogates |
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55 | * are not allowed. |
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56 | * |
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57 | * Returns false if the input string isn't a valid UTF-8 octet sequence. |
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58 | */ |
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59 | function utf8ToUnicode(&$str) |
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60 | { |
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61 | $mState = 0; // cached expected number of octets after the current octet |
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62 | // until the beginning of the next UTF8 character sequence |
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63 | $mUcs4 = 0; // cached Unicode character |
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64 | $mBytes = 1; // cached expected number of octets in the current sequence |
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65 | |
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66 | $out = array(); |
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67 | |
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68 | $len = strlen($str); |
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69 | for($i = 0; $i < $len; $i++) { |
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70 | $in = ord($str{$i}); |
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71 | if (0 == $mState) { |
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72 | // When mState is zero we expect either a US-ASCII character or a |
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73 | // multi-octet sequence. |
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74 | if (0 == (0x80 & ($in))) { |
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75 | // US-ASCII, pass straight through. |
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76 | $out[] = $in; |
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77 | $mBytes = 1; |
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78 | } else if (0xC0 == (0xE0 & ($in))) { |
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79 | // First octet of 2 octet sequence |
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80 | $mUcs4 = ($in); |
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81 | $mUcs4 = ($mUcs4 & 0x1F) << 6; |
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82 | $mState = 1; |
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83 | $mBytes = 2; |
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84 | } else if (0xE0 == (0xF0 & ($in))) { |
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85 | // First octet of 3 octet sequence |
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86 | $mUcs4 = ($in); |
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87 | $mUcs4 = ($mUcs4 & 0x0F) << 12; |
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88 | $mState = 2; |
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89 | $mBytes = 3; |
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90 | } else if (0xF0 == (0xF8 & ($in))) { |
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91 | // First octet of 4 octet sequence |
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92 | $mUcs4 = ($in); |
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93 | $mUcs4 = ($mUcs4 & 0x07) << 18; |
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94 | $mState = 3; |
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95 | $mBytes = 4; |
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96 | } else if (0xF8 == (0xFC & ($in))) { |
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97 | /* First octet of 5 octet sequence. |
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98 | * |
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99 | * This is illegal because the encoded codepoint must be either |
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100 | * (a) not the shortest form or |
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101 | * (b) outside the Unicode range of 0-0x10FFFF. |
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102 | * Rather than trying to resynchronize, we will carry on until the end |
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103 | * of the sequence and let the later error handling code catch it. |
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104 | */ |
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105 | $mUcs4 = ($in); |
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106 | $mUcs4 = ($mUcs4 & 0x03) << 24; |
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107 | $mState = 4; |
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108 | $mBytes = 5; |
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109 | } else if (0xFC == (0xFE & ($in))) { |
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110 | // First octet of 6 octet sequence, see comments for 5 octet sequence. |
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111 | $mUcs4 = ($in); |
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112 | $mUcs4 = ($mUcs4 & 1) << 30; |
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113 | $mState = 5; |
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114 | $mBytes = 6; |
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115 | } else { |
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116 | /* Current octet is neither in the US-ASCII range nor a legal first |
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117 | * octet of a multi-octet sequence. |
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118 | */ |
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119 | return false; |
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120 | } |
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121 | } else { |
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122 | // When mState is non-zero, we expect a continuation of the multi-octet |
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123 | // sequence |
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124 | if (0x80 == (0xC0 & ($in))) { |
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125 | // Legal continuation. |
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126 | $shift = ($mState - 1) * 6; |
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127 | $tmp = $in; |
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128 | $tmp = ($tmp & 0x0000003F) << $shift; |
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129 | $mUcs4 |= $tmp; |
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130 | |
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131 | if (0 == --$mState) { |
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132 | /* End of the multi-octet sequence. mUcs4 now contains the final |
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133 | * Unicode codepoint to be output |
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134 | * |
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135 | * Check for illegal sequences and codepoints. |
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136 | */ |
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137 | |
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138 | // From Unicode 3.1, non-shortest form is illegal |
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139 | if (((2 == $mBytes) && ($mUcs4 < 0x0080)) || |
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140 | ((3 == $mBytes) && ($mUcs4 < 0x0800)) || |
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141 | ((4 == $mBytes) && ($mUcs4 < 0x10000)) || |
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142 | (4 < $mBytes) || |
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143 | // From Unicode 3.2, surrogate characters are illegal |
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144 | (($mUcs4 & 0xFFFFF800) == 0xD800) || |
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145 | // Codepoints outside the Unicode range are illegal |
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146 | ($mUcs4 > 0x10FFFF)) { |
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147 | return false; |
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148 | } |
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149 | if (0xFEFF != $mUcs4) { |
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150 | // BOM is legal but we don't want to output it |
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151 | $out[] = $mUcs4; |
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152 | } |
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153 | //initialize UTF8 cache |
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154 | $mState = 0; |
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155 | $mUcs4 = 0; |
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156 | $mBytes = 1; |
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157 | } |
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158 | } else { |
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159 | /* ((0xC0 & (*in) != 0x80) && (mState != 0)) |
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160 | * |
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161 | * Incomplete multi-octet sequence. |
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162 | */ |
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163 | return false; |
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164 | } |
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165 | } |
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166 | } |
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167 | return $out; |
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168 | } |
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169 | |
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170 | /** |
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171 | * Takes an array of ints representing the Unicode characters and returns |
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172 | * a UTF-8 string. Astral planes are supported ie. the ints in the |
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173 | * input can be > 0xFFFF. Occurrances of the BOM are ignored. Surrogates |
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174 | * are not allowed. |
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175 | * |
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176 | * Returns false if the input array contains ints that represent |
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177 | * surrogates or are outside the Unicode range. |
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178 | */ |
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179 | function unicodeToUtf8(&$arr) |
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180 | { |
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181 | $dest = ''; |
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182 | foreach ($arr as $src) { |
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183 | if($src < 0) { |
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184 | return false; |
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185 | } else if ( $src <= 0x007f) { |
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186 | $dest .= chr($src); |
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187 | } else if ($src <= 0x07ff) { |
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188 | $dest .= chr(0xc0 | ($src >> 6)); |
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189 | $dest .= chr(0x80 | ($src & 0x003f)); |
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190 | } else if($src == 0xFEFF) { |
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191 | // nop -- zap the BOM |
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192 | } else if ($src >= 0xD800 && $src <= 0xDFFF) { |
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193 | // found a surrogate |
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194 | return false; |
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195 | } else if ($src <= 0xffff) { |
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196 | $dest .= chr(0xe0 | ($src >> 12)); |
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197 | $dest .= chr(0x80 | (($src >> 6) & 0x003f)); |
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198 | $dest .= chr(0x80 | ($src & 0x003f)); |
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199 | } else if ($src <= 0x10ffff) { |
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200 | $dest .= chr(0xf0 | ($src >> 18)); |
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201 | $dest .= chr(0x80 | (($src >> 12) & 0x3f)); |
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202 | $dest .= chr(0x80 | (($src >> 6) & 0x3f)); |
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203 | $dest .= chr(0x80 | ($src & 0x3f)); |
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204 | } else { |
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205 | // out of range |
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206 | return false; |
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207 | } |
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208 | } |
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209 | return $dest; |
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210 | } |
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211 | function check_string($ics){ |
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212 | $ics_file = explode("\n",$ics); |
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213 | foreach($ics_file as $line => $str){ |
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214 | if(false === utf8ToUnicode($str)){ |
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215 | $error[] = $line; |
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216 | } |
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217 | } |
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218 | if(isset($error) && is_array($error)){ |
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219 | foreach($error as $line){ |
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220 | dbg_error_log( "LOG check_string","error on lines % invalid character in string %s" , ($line +1),$ics_file[$line] ); |
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221 | return false; |
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222 | } |
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223 | } else { |
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224 | dbg_error_log( "LOG check_string","the string is UTF8 compliant"); |
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225 | return true; |
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226 | } |
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227 | } |
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228 | ?> |
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