/framework/vendor/swift/lib/classes/Swift/CharacterReader/Utf8Reader.php
PHP | 183 lines | 127 code | 9 blank | 47 comment | 10 complexity | fa6b3429d9e99eb269bcc119ef1f9e0d MD5 | raw file
1<?php 2 3/* 4 * This file is part of SwiftMailer. 5 * (c) 2004-2009 Chris Corbyn 6 * 7 * For the full copyright and license information, please view the LICENSE 8 * file that was distributed with this source code. 9 */ 10 11//@require 'Swift/CharacterReader.php'; 12 13/** 14 * Analyzes UTF-8 characters. 15 * @package Swift 16 * @subpackage Encoder 17 * @author Chris Corbyn 18 * @author Xavier De Cock <xdecock@gmail.com> 19 */ 20class Swift_CharacterReader_Utf8Reader 21 implements Swift_CharacterReader 22{ 23 24 /** Pre-computed for optimization */ 25 private static $length_map=array( 26//N=0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F, 27 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, //0x0N 28 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, //0x1N 29 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, //0x2N 30 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, //0x3N 31 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, //0x4N 32 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, //0x5N 33 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, //0x6N 34 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, //0x7N 35 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, //0x8N 36 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, //0x9N 37 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, //0xAN 38 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, //0xBN 39 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, //0xCN 40 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, //0xDN 41 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3, //0xEN 42 4,4,4,4,4,4,4,4,5,5,5,5,6,6,0,0 //0xFN 43 ); 44 private static $s_length_map=array( 45 "\x00"=>1, "\x01"=>1, "\x02"=>1, "\x03"=>1, "\x04"=>1, "\x05"=>1, "\x06"=>1, "\x07"=>1, 46 "\x08"=>1, "\x09"=>1, "\x0a"=>1, "\x0b"=>1, "\x0c"=>1, "\x0d"=>1, "\x0e"=>1, "\x0f"=>1, 47 "\x10"=>1, "\x11"=>1, "\x12"=>1, "\x13"=>1, "\x14"=>1, "\x15"=>1, "\x16"=>1, "\x17"=>1, 48 "\x18"=>1, "\x19"=>1, "\x1a"=>1, "\x1b"=>1, "\x1c"=>1, "\x1d"=>1, "\x1e"=>1, "\x1f"=>1, 49 "\x20"=>1, "\x21"=>1, "\x22"=>1, "\x23"=>1, "\x24"=>1, "\x25"=>1, "\x26"=>1, "\x27"=>1, 50 "\x28"=>1, "\x29"=>1, "\x2a"=>1, "\x2b"=>1, "\x2c"=>1, "\x2d"=>1, "\x2e"=>1, "\x2f"=>1, 51 "\x30"=>1, "\x31"=>1, "\x32"=>1, "\x33"=>1, "\x34"=>1, "\x35"=>1, "\x36"=>1, "\x37"=>1, 52 "\x38"=>1, "\x39"=>1, "\x3a"=>1, "\x3b"=>1, "\x3c"=>1, "\x3d"=>1, "\x3e"=>1, "\x3f"=>1, 53 "\x40"=>1, "\x41"=>1, "\x42"=>1, "\x43"=>1, "\x44"=>1, "\x45"=>1, "\x46"=>1, "\x47"=>1, 54 "\x48"=>1, "\x49"=>1, "\x4a"=>1, "\x4b"=>1, "\x4c"=>1, "\x4d"=>1, "\x4e"=>1, "\x4f"=>1, 55 "\x50"=>1, "\x51"=>1, "\x52"=>1, "\x53"=>1, "\x54"=>1, "\x55"=>1, "\x56"=>1, "\x57"=>1, 56 "\x58"=>1, "\x59"=>1, "\x5a"=>1, "\x5b"=>1, "\x5c"=>1, "\x5d"=>1, "\x5e"=>1, "\x5f"=>1, 57 "\x60"=>1, "\x61"=>1, "\x62"=>1, "\x63"=>1, "\x64"=>1, "\x65"=>1, "\x66"=>1, "\x67"=>1, 58 "\x68"=>1, "\x69"=>1, "\x6a"=>1, "\x6b"=>1, "\x6c"=>1, "\x6d"=>1, "\x6e"=>1, "\x6f"=>1, 59 "\x70"=>1, "\x71"=>1, "\x72"=>1, "\x73"=>1, "\x74"=>1, "\x75"=>1, "\x76"=>1, "\x77"=>1, 60 "\x78"=>1, "\x79"=>1, "\x7a"=>1, "\x7b"=>1, "\x7c"=>1, "\x7d"=>1, "\x7e"=>1, "\x7f"=>1, 61 "\x80"=>0, "\x81"=>0, "\x82"=>0, "\x83"=>0, "\x84"=>0, "\x85"=>0, "\x86"=>0, "\x87"=>0, 62 "\x88"=>0, "\x89"=>0, "\x8a"=>0, "\x8b"=>0, "\x8c"=>0, "\x8d"=>0, "\x8e"=>0, "\x8f"=>0, 63 "\x90"=>0, "\x91"=>0, "\x92"=>0, "\x93"=>0, "\x94"=>0, "\x95"=>0, "\x96"=>0, "\x97"=>0, 64 "\x98"=>0, "\x99"=>0, "\x9a"=>0, "\x9b"=>0, "\x9c"=>0, "\x9d"=>0, "\x9e"=>0, "\x9f"=>0, 65 "\xa0"=>0, "\xa1"=>0, "\xa2"=>0, "\xa3"=>0, "\xa4"=>0, "\xa5"=>0, "\xa6"=>0, "\xa7"=>0, 66 "\xa8"=>0, "\xa9"=>0, "\xaa"=>0, "\xab"=>0, "\xac"=>0, "\xad"=>0, "\xae"=>0, "\xaf"=>0, 67 "\xb0"=>0, "\xb1"=>0, "\xb2"=>0, "\xb3"=>0, "\xb4"=>0, "\xb5"=>0, "\xb6"=>0, "\xb7"=>0, 68 "\xb8"=>0, "\xb9"=>0, "\xba"=>0, "\xbb"=>0, "\xbc"=>0, "\xbd"=>0, "\xbe"=>0, "\xbf"=>0, 69 "\xc0"=>2, "\xc1"=>2, "\xc2"=>2, "\xc3"=>2, "\xc4"=>2, "\xc5"=>2, "\xc6"=>2, "\xc7"=>2, 70 "\xc8"=>2, "\xc9"=>2, "\xca"=>2, "\xcb"=>2, "\xcc"=>2, "\xcd"=>2, "\xce"=>2, "\xcf"=>2, 71 "\xd0"=>2, "\xd1"=>2, "\xd2"=>2, "\xd3"=>2, "\xd4"=>2, "\xd5"=>2, "\xd6"=>2, "\xd7"=>2, 72 "\xd8"=>2, "\xd9"=>2, "\xda"=>2, "\xdb"=>2, "\xdc"=>2, "\xdd"=>2, "\xde"=>2, "\xdf"=>2, 73 "\xe0"=>3, "\xe1"=>3, "\xe2"=>3, "\xe3"=>3, "\xe4"=>3, "\xe5"=>3, "\xe6"=>3, "\xe7"=>3, 74 "\xe8"=>3, "\xe9"=>3, "\xea"=>3, "\xeb"=>3, "\xec"=>3, "\xed"=>3, "\xee"=>3, "\xef"=>3, 75 "\xf0"=>4, "\xf1"=>4, "\xf2"=>4, "\xf3"=>4, "\xf4"=>4, "\xf5"=>4, "\xf6"=>4, "\xf7"=>4, 76 "\xf8"=>5, "\xf9"=>5, "\xfa"=>5, "\xfb"=>5, "\xfc"=>6, "\xfd"=>6, "\xfe"=>0, "\xff"=>0, 77 ); 78 79 /** 80 * Returns the complete charactermap 81 * 82 * @param string $string 83 * @param int $startOffset 84 * @param array $currentMap 85 * @param mixed $ignoredChars 86 */ 87 public function getCharPositions($string, $startOffset, &$currentMap, &$ignoredChars) 88 { 89 if (!isset($currentMap['i']) || !isset($currentMap['p'])) 90 { 91 $currentMap['p'] = $currentMap['i'] = array(); 92 } 93 $strlen=strlen($string); 94 $charPos=count($currentMap['p']); 95 $foundChars=0; 96 $invalid=false; 97 for ($i=0; $i<$strlen; ++$i) 98 { 99 $char=$string[$i]; 100 $size=self::$s_length_map[$char]; 101 if ($size==0) 102 { 103 /* char is invalid, we must wait for a resync */ 104 $invalid=true; 105 continue; 106 } 107 else 108 { 109 if ($invalid==true) 110 { 111 /* We mark the chars as invalid and start a new char */ 112 $currentMap['p'][$charPos+$foundChars]=$startOffset+$i; 113 $currentMap['i'][$charPos+$foundChars]=true; 114 ++$foundChars; 115 $invalid=false; 116 } 117 if (($i+$size) > $strlen){ 118 $ignoredChars=substr($string, $i); 119 break; 120 } 121 for ($j=1; $j<$size; ++$j) 122 { 123 $char=$string[$i+$j]; 124 if ($char>"\x7F" && $char<"\xC0") 125 { 126 // Valid - continue parsing 127 } 128 else 129 { 130 /* char is invalid, we must wait for a resync */ 131 $invalid=true; 132 continue 2; 133 } 134 } 135 /* Ok we got a complete char here */ 136 $lastChar=$currentMap['p'][$charPos+$foundChars]=$startOffset+$i+$size; 137 $i+=$j-1; 138 ++$foundChars; 139 } 140 } 141 return $foundChars; 142 } 143 144 /** 145 * Returns mapType 146 * @int mapType 147 */ 148 public function getMapType() 149 { 150 return self::MAP_TYPE_POSITIONS; 151 } 152 153 /** 154 * Returns an integer which specifies how many more bytes to read. 155 * A positive integer indicates the number of more bytes to fetch before invoking 156 * this method again. 157 * A value of zero means this is already a valid character. 158 * A value of -1 means this cannot possibly be a valid character. 159 * @param string $bytes 160 * @return int 161 */ 162 public function validateByteSequence($bytes, $size) 163 { 164 if ($size<1){ 165 return -1; 166 } 167 $needed = self::$length_map[$bytes[0]] - $size; 168 return ($needed > -1) 169 ? $needed 170 : -1 171 ; 172 } 173 174 /** 175 * Returns the number of bytes which should be read to start each character. 176 * @return int 177 */ 178 public function getInitialByteSize() 179 { 180 return 1; 181 } 182 183}