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1 <?php |
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2 |
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3 /* |
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4 * This file is part of SwiftMailer. |
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5 * (c) 2004-2009 Chris Corbyn |
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6 * |
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7 * For the full copyright and license information, please view the LICENSE |
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8 * file that was distributed with this source code. |
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9 */ |
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10 |
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11 |
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12 /** |
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13 * Analyzes UTF-8 characters. |
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14 * @package Swift |
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15 * @subpackage Encoder |
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16 * @author Chris Corbyn |
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17 * @author Xavier De Cock <xdecock@gmail.com> |
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18 */ |
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19 class Swift_CharacterReader_Utf8Reader |
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20 implements Swift_CharacterReader |
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21 { |
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22 |
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23 /** Pre-computed for optimization */ |
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24 private static $length_map=array( |
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25 //N=0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F, |
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26 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, //0x0N |
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27 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, //0x1N |
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28 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, //0x2N |
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29 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, //0x3N |
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30 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, //0x4N |
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31 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, //0x5N |
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32 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, //0x6N |
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33 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, //0x7N |
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34 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, //0x8N |
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35 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, //0x9N |
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36 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, //0xAN |
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37 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, //0xBN |
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38 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, //0xCN |
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39 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, //0xDN |
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40 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3, //0xEN |
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41 4,4,4,4,4,4,4,4,5,5,5,5,6,6,0,0 //0xFN |
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42 ); |
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43 private static $s_length_map=array( |
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44 "\x00"=>1, "\x01"=>1, "\x02"=>1, "\x03"=>1, "\x04"=>1, "\x05"=>1, "\x06"=>1, "\x07"=>1, |
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45 "\x08"=>1, "\x09"=>1, "\x0a"=>1, "\x0b"=>1, "\x0c"=>1, "\x0d"=>1, "\x0e"=>1, "\x0f"=>1, |
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46 "\x10"=>1, "\x11"=>1, "\x12"=>1, "\x13"=>1, "\x14"=>1, "\x15"=>1, "\x16"=>1, "\x17"=>1, |
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47 "\x18"=>1, "\x19"=>1, "\x1a"=>1, "\x1b"=>1, "\x1c"=>1, "\x1d"=>1, "\x1e"=>1, "\x1f"=>1, |
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48 "\x20"=>1, "\x21"=>1, "\x22"=>1, "\x23"=>1, "\x24"=>1, "\x25"=>1, "\x26"=>1, "\x27"=>1, |
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49 "\x28"=>1, "\x29"=>1, "\x2a"=>1, "\x2b"=>1, "\x2c"=>1, "\x2d"=>1, "\x2e"=>1, "\x2f"=>1, |
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50 "\x30"=>1, "\x31"=>1, "\x32"=>1, "\x33"=>1, "\x34"=>1, "\x35"=>1, "\x36"=>1, "\x37"=>1, |
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51 "\x38"=>1, "\x39"=>1, "\x3a"=>1, "\x3b"=>1, "\x3c"=>1, "\x3d"=>1, "\x3e"=>1, "\x3f"=>1, |
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52 "\x40"=>1, "\x41"=>1, "\x42"=>1, "\x43"=>1, "\x44"=>1, "\x45"=>1, "\x46"=>1, "\x47"=>1, |
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53 "\x48"=>1, "\x49"=>1, "\x4a"=>1, "\x4b"=>1, "\x4c"=>1, "\x4d"=>1, "\x4e"=>1, "\x4f"=>1, |
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54 "\x50"=>1, "\x51"=>1, "\x52"=>1, "\x53"=>1, "\x54"=>1, "\x55"=>1, "\x56"=>1, "\x57"=>1, |
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55 "\x58"=>1, "\x59"=>1, "\x5a"=>1, "\x5b"=>1, "\x5c"=>1, "\x5d"=>1, "\x5e"=>1, "\x5f"=>1, |
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56 "\x60"=>1, "\x61"=>1, "\x62"=>1, "\x63"=>1, "\x64"=>1, "\x65"=>1, "\x66"=>1, "\x67"=>1, |
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57 "\x68"=>1, "\x69"=>1, "\x6a"=>1, "\x6b"=>1, "\x6c"=>1, "\x6d"=>1, "\x6e"=>1, "\x6f"=>1, |
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58 "\x70"=>1, "\x71"=>1, "\x72"=>1, "\x73"=>1, "\x74"=>1, "\x75"=>1, "\x76"=>1, "\x77"=>1, |
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59 "\x78"=>1, "\x79"=>1, "\x7a"=>1, "\x7b"=>1, "\x7c"=>1, "\x7d"=>1, "\x7e"=>1, "\x7f"=>1, |
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60 "\x80"=>0, "\x81"=>0, "\x82"=>0, "\x83"=>0, "\x84"=>0, "\x85"=>0, "\x86"=>0, "\x87"=>0, |
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61 "\x88"=>0, "\x89"=>0, "\x8a"=>0, "\x8b"=>0, "\x8c"=>0, "\x8d"=>0, "\x8e"=>0, "\x8f"=>0, |
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62 "\x90"=>0, "\x91"=>0, "\x92"=>0, "\x93"=>0, "\x94"=>0, "\x95"=>0, "\x96"=>0, "\x97"=>0, |
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63 "\x98"=>0, "\x99"=>0, "\x9a"=>0, "\x9b"=>0, "\x9c"=>0, "\x9d"=>0, "\x9e"=>0, "\x9f"=>0, |
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64 "\xa0"=>0, "\xa1"=>0, "\xa2"=>0, "\xa3"=>0, "\xa4"=>0, "\xa5"=>0, "\xa6"=>0, "\xa7"=>0, |
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65 "\xa8"=>0, "\xa9"=>0, "\xaa"=>0, "\xab"=>0, "\xac"=>0, "\xad"=>0, "\xae"=>0, "\xaf"=>0, |
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66 "\xb0"=>0, "\xb1"=>0, "\xb2"=>0, "\xb3"=>0, "\xb4"=>0, "\xb5"=>0, "\xb6"=>0, "\xb7"=>0, |
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67 "\xb8"=>0, "\xb9"=>0, "\xba"=>0, "\xbb"=>0, "\xbc"=>0, "\xbd"=>0, "\xbe"=>0, "\xbf"=>0, |
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68 "\xc0"=>2, "\xc1"=>2, "\xc2"=>2, "\xc3"=>2, "\xc4"=>2, "\xc5"=>2, "\xc6"=>2, "\xc7"=>2, |
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69 "\xc8"=>2, "\xc9"=>2, "\xca"=>2, "\xcb"=>2, "\xcc"=>2, "\xcd"=>2, "\xce"=>2, "\xcf"=>2, |
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70 "\xd0"=>2, "\xd1"=>2, "\xd2"=>2, "\xd3"=>2, "\xd4"=>2, "\xd5"=>2, "\xd6"=>2, "\xd7"=>2, |
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71 "\xd8"=>2, "\xd9"=>2, "\xda"=>2, "\xdb"=>2, "\xdc"=>2, "\xdd"=>2, "\xde"=>2, "\xdf"=>2, |
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72 "\xe0"=>3, "\xe1"=>3, "\xe2"=>3, "\xe3"=>3, "\xe4"=>3, "\xe5"=>3, "\xe6"=>3, "\xe7"=>3, |
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73 "\xe8"=>3, "\xe9"=>3, "\xea"=>3, "\xeb"=>3, "\xec"=>3, "\xed"=>3, "\xee"=>3, "\xef"=>3, |
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74 "\xf0"=>4, "\xf1"=>4, "\xf2"=>4, "\xf3"=>4, "\xf4"=>4, "\xf5"=>4, "\xf6"=>4, "\xf7"=>4, |
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75 "\xf8"=>5, "\xf9"=>5, "\xfa"=>5, "\xfb"=>5, "\xfc"=>6, "\xfd"=>6, "\xfe"=>0, "\xff"=>0, |
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76 ); |
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77 |
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78 /** |
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79 * Returns the complete charactermap |
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80 * |
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81 * @param string $string |
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82 * @param int $startOffset |
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83 * @param array $currentMap |
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84 * @param mixed $ignoredChars |
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85 */ |
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86 public function getCharPositions($string, $startOffset, &$currentMap, &$ignoredChars) |
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87 { |
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88 if (!isset($currentMap['i']) || !isset($currentMap['p'])) |
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89 { |
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90 $currentMap['p'] = $currentMap['i'] = array(); |
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91 } |
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92 $strlen=strlen($string); |
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93 $charPos=count($currentMap['p']); |
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94 $foundChars=0; |
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95 $invalid=false; |
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96 for ($i=0; $i<$strlen; ++$i) |
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97 { |
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98 $char=$string[$i]; |
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99 $size=self::$s_length_map[$char]; |
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100 if ($size==0) |
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101 { |
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102 /* char is invalid, we must wait for a resync */ |
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103 $invalid=true; |
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104 continue; |
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105 } |
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106 else |
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107 { |
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108 if ($invalid==true) |
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109 { |
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110 /* We mark the chars as invalid and start a new char */ |
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111 $currentMap['p'][$charPos+$foundChars]=$startOffset+$i; |
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112 $currentMap['i'][$charPos+$foundChars]=true; |
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113 ++$foundChars; |
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114 $invalid=false; |
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115 } |
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116 if (($i+$size) > $strlen){ |
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117 $ignoredChars=substr($string, $i); |
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118 break; |
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119 } |
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120 for ($j=1; $j<$size; ++$j) |
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121 { |
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122 $char=$string[$i+$j]; |
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123 if ($char>"\x7F" && $char<"\xC0") |
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124 { |
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125 // Valid - continue parsing |
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126 } |
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127 else |
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128 { |
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129 /* char is invalid, we must wait for a resync */ |
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130 $invalid=true; |
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131 continue 2; |
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132 } |
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133 } |
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134 /* Ok we got a complete char here */ |
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135 $lastChar=$currentMap['p'][$charPos+$foundChars]=$startOffset+$i+$size; |
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136 $i+=$j-1; |
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137 ++$foundChars; |
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138 } |
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139 } |
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140 return $foundChars; |
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141 } |
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142 |
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143 /** |
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144 * Returns mapType |
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145 * @int mapType |
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146 */ |
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147 public function getMapType() |
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148 { |
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149 return self::MAP_TYPE_POSITIONS; |
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150 } |
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151 |
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152 /** |
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153 * Returns an integer which specifies how many more bytes to read. |
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154 * A positive integer indicates the number of more bytes to fetch before invoking |
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155 * this method again. |
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156 * A value of zero means this is already a valid character. |
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157 * A value of -1 means this cannot possibly be a valid character. |
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158 * @param string $bytes |
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159 * @return int |
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160 */ |
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161 public function validateByteSequence($bytes, $size) |
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162 { |
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163 if ($size<1){ |
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164 return -1; |
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165 } |
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166 $needed = self::$length_map[$bytes[0]] - $size; |
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167 return ($needed > -1) |
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168 ? $needed |
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169 : -1 |
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170 ; |
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171 } |
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172 |
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173 /** |
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174 * Returns the number of bytes which should be read to start each character. |
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175 * @return int |
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176 */ |
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177 public function getInitialByteSize() |
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178 { |
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179 return 1; |
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180 } |
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181 |
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182 } |