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177 lines
7.9 KiB
PHP
177 lines
7.9 KiB
PHP
<?php
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/*
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* This file is part of SwiftMailer.
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* (c) 2004-2009 Chris Corbyn
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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/**
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* Analyzes UTF-8 characters.
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*
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* @author Chris Corbyn
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* @author Xavier De Cock <xdecock@gmail.com>
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*/
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class Swift_CharacterReader_Utf8Reader implements Swift_CharacterReader
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{
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/** Pre-computed for optimization */
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private static $length_map = array(
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// N=0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F,
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, // 0x0N
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, // 0x1N
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, // 0x2N
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, // 0x3N
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, // 0x4N
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, // 0x5N
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, // 0x6N
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, // 0x7N
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 0x8N
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 0x9N
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 0xAN
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, // 0xBN
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2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, // 0xCN
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2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, // 0xDN
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3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3, // 0xEN
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4,4,4,4,4,4,4,4,5,5,5,5,6,6,0,0, // 0xFN
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);
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private static $s_length_map = array(
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"\x00" => 1, "\x01" => 1, "\x02" => 1, "\x03" => 1, "\x04" => 1, "\x05" => 1, "\x06" => 1, "\x07" => 1,
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"\x08" => 1, "\x09" => 1, "\x0a" => 1, "\x0b" => 1, "\x0c" => 1, "\x0d" => 1, "\x0e" => 1, "\x0f" => 1,
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"\x10" => 1, "\x11" => 1, "\x12" => 1, "\x13" => 1, "\x14" => 1, "\x15" => 1, "\x16" => 1, "\x17" => 1,
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"\x18" => 1, "\x19" => 1, "\x1a" => 1, "\x1b" => 1, "\x1c" => 1, "\x1d" => 1, "\x1e" => 1, "\x1f" => 1,
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"\x20" => 1, "\x21" => 1, "\x22" => 1, "\x23" => 1, "\x24" => 1, "\x25" => 1, "\x26" => 1, "\x27" => 1,
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"\x28" => 1, "\x29" => 1, "\x2a" => 1, "\x2b" => 1, "\x2c" => 1, "\x2d" => 1, "\x2e" => 1, "\x2f" => 1,
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"\x30" => 1, "\x31" => 1, "\x32" => 1, "\x33" => 1, "\x34" => 1, "\x35" => 1, "\x36" => 1, "\x37" => 1,
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"\x38" => 1, "\x39" => 1, "\x3a" => 1, "\x3b" => 1, "\x3c" => 1, "\x3d" => 1, "\x3e" => 1, "\x3f" => 1,
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"\x40" => 1, "\x41" => 1, "\x42" => 1, "\x43" => 1, "\x44" => 1, "\x45" => 1, "\x46" => 1, "\x47" => 1,
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"\x48" => 1, "\x49" => 1, "\x4a" => 1, "\x4b" => 1, "\x4c" => 1, "\x4d" => 1, "\x4e" => 1, "\x4f" => 1,
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"\x50" => 1, "\x51" => 1, "\x52" => 1, "\x53" => 1, "\x54" => 1, "\x55" => 1, "\x56" => 1, "\x57" => 1,
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"\x58" => 1, "\x59" => 1, "\x5a" => 1, "\x5b" => 1, "\x5c" => 1, "\x5d" => 1, "\x5e" => 1, "\x5f" => 1,
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"\x60" => 1, "\x61" => 1, "\x62" => 1, "\x63" => 1, "\x64" => 1, "\x65" => 1, "\x66" => 1, "\x67" => 1,
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"\x68" => 1, "\x69" => 1, "\x6a" => 1, "\x6b" => 1, "\x6c" => 1, "\x6d" => 1, "\x6e" => 1, "\x6f" => 1,
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"\x70" => 1, "\x71" => 1, "\x72" => 1, "\x73" => 1, "\x74" => 1, "\x75" => 1, "\x76" => 1, "\x77" => 1,
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"\x78" => 1, "\x79" => 1, "\x7a" => 1, "\x7b" => 1, "\x7c" => 1, "\x7d" => 1, "\x7e" => 1, "\x7f" => 1,
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"\x80" => 0, "\x81" => 0, "\x82" => 0, "\x83" => 0, "\x84" => 0, "\x85" => 0, "\x86" => 0, "\x87" => 0,
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"\x88" => 0, "\x89" => 0, "\x8a" => 0, "\x8b" => 0, "\x8c" => 0, "\x8d" => 0, "\x8e" => 0, "\x8f" => 0,
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"\x90" => 0, "\x91" => 0, "\x92" => 0, "\x93" => 0, "\x94" => 0, "\x95" => 0, "\x96" => 0, "\x97" => 0,
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"\x98" => 0, "\x99" => 0, "\x9a" => 0, "\x9b" => 0, "\x9c" => 0, "\x9d" => 0, "\x9e" => 0, "\x9f" => 0,
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"\xa0" => 0, "\xa1" => 0, "\xa2" => 0, "\xa3" => 0, "\xa4" => 0, "\xa5" => 0, "\xa6" => 0, "\xa7" => 0,
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"\xa8" => 0, "\xa9" => 0, "\xaa" => 0, "\xab" => 0, "\xac" => 0, "\xad" => 0, "\xae" => 0, "\xaf" => 0,
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"\xb0" => 0, "\xb1" => 0, "\xb2" => 0, "\xb3" => 0, "\xb4" => 0, "\xb5" => 0, "\xb6" => 0, "\xb7" => 0,
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"\xb8" => 0, "\xb9" => 0, "\xba" => 0, "\xbb" => 0, "\xbc" => 0, "\xbd" => 0, "\xbe" => 0, "\xbf" => 0,
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"\xc0" => 2, "\xc1" => 2, "\xc2" => 2, "\xc3" => 2, "\xc4" => 2, "\xc5" => 2, "\xc6" => 2, "\xc7" => 2,
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"\xc8" => 2, "\xc9" => 2, "\xca" => 2, "\xcb" => 2, "\xcc" => 2, "\xcd" => 2, "\xce" => 2, "\xcf" => 2,
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"\xd0" => 2, "\xd1" => 2, "\xd2" => 2, "\xd3" => 2, "\xd4" => 2, "\xd5" => 2, "\xd6" => 2, "\xd7" => 2,
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"\xd8" => 2, "\xd9" => 2, "\xda" => 2, "\xdb" => 2, "\xdc" => 2, "\xdd" => 2, "\xde" => 2, "\xdf" => 2,
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"\xe0" => 3, "\xe1" => 3, "\xe2" => 3, "\xe3" => 3, "\xe4" => 3, "\xe5" => 3, "\xe6" => 3, "\xe7" => 3,
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"\xe8" => 3, "\xe9" => 3, "\xea" => 3, "\xeb" => 3, "\xec" => 3, "\xed" => 3, "\xee" => 3, "\xef" => 3,
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"\xf0" => 4, "\xf1" => 4, "\xf2" => 4, "\xf3" => 4, "\xf4" => 4, "\xf5" => 4, "\xf6" => 4, "\xf7" => 4,
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"\xf8" => 5, "\xf9" => 5, "\xfa" => 5, "\xfb" => 5, "\xfc" => 6, "\xfd" => 6, "\xfe" => 0, "\xff" => 0,
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);
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/**
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* Returns the complete character map.
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*
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* @param string $string
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* @param int $startOffset
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* @param array $currentMap
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* @param mixed $ignoredChars
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*
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* @return int
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*/
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public function getCharPositions($string, $startOffset, &$currentMap, &$ignoredChars)
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{
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if (!isset($currentMap['i']) || !isset($currentMap['p'])) {
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$currentMap['p'] = $currentMap['i'] = array();
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}
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$strlen = strlen($string);
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$charPos = count($currentMap['p']);
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$foundChars = 0;
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$invalid = false;
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for ($i = 0; $i < $strlen; ++$i) {
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$char = $string[$i];
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$size = self::$s_length_map[$char];
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if ($size == 0) {
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/* char is invalid, we must wait for a resync */
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$invalid = true;
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continue;
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} else {
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if ($invalid == true) {
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/* We mark the chars as invalid and start a new char */
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$currentMap['p'][$charPos + $foundChars] = $startOffset + $i;
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$currentMap['i'][$charPos + $foundChars] = true;
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++$foundChars;
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$invalid = false;
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}
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if (($i + $size) > $strlen) {
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$ignoredChars = substr($string, $i);
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break;
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}
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for ($j = 1; $j < $size; ++$j) {
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$char = $string[$i + $j];
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if ($char > "\x7F" && $char < "\xC0") {
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// Valid - continue parsing
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} else {
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/* char is invalid, we must wait for a resync */
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$invalid = true;
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continue 2;
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}
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}
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/* Ok we got a complete char here */
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$currentMap['p'][$charPos + $foundChars] = $startOffset + $i + $size;
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$i += $j - 1;
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++$foundChars;
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}
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}
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return $foundChars;
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}
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/**
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* Returns mapType.
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*
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* @return int mapType
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*/
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public function getMapType()
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{
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return self::MAP_TYPE_POSITIONS;
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}
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/**
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* Returns an integer which specifies how many more bytes to read.
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*
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* A positive integer indicates the number of more bytes to fetch before invoking
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* this method again.
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* A value of zero means this is already a valid character.
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* A value of -1 means this cannot possibly be a valid character.
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*
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* @param string $bytes
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* @param int $size
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*
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* @return int
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*/
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public function validateByteSequence($bytes, $size)
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{
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if ($size < 1) {
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return -1;
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}
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$needed = self::$length_map[$bytes[0]] - $size;
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return $needed > -1 ? $needed : -1;
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}
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/**
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* Returns the number of bytes which should be read to start each character.
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*
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* @return int
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*/
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public function getInitialByteSize()
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{
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return 1;
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}
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}
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