function CharacterStream::getUtf8CharPositions

1 call to CharacterStream::getUtf8CharPositions()

CharacterStream::write in vendor/symfony/mime/CharacterStream.php

File

vendor/symfony/mime/CharacterStream.php, line 167

Class

CharacterStream

@author Fabien Potencier <fabien@symfony.com> @author Xavier De Cock <xdecock@gmail.com>

Namespace

Symfony\Component\Mime

Code

private function getUtf8CharPositions(string $string, int $startOffset, string &$ignoredChars) : int {
    $strlen = \strlen($string);
    $charPos = \count($this->map['p']);
    $foundChars = 0;
    $invalid = false;
    for ($i = 0; $i < $strlen; ++$i) {
        $char = $string[$i];
        $size = self::UTF8_LENGTH_MAP[$char];
        if (0 == $size) {
            
            /* char is invalid, we must wait for a resync */
            $invalid = true;
            continue;
        }
        if ($invalid) {
            
            /* We mark the chars as invalid and start a new char */
            $this->map['p'][$charPos + $foundChars] = $startOffset + $i;
            $this->map['i'][$charPos + $foundChars] = true;
            ++$foundChars;
            $invalid = false;
        }
        if ($i + $size > $strlen) {
            $ignoredChars = substr($string, $i);
            break;
        }
        for ($j = 1; $j < $size; ++$j) {
            $char = $string[$i + $j];
            if ($char > "" && $char < "\xc0") {
                // Valid - continue parsing
            }
            else {
                
                /* char is invalid, we must wait for a resync */
                $invalid = true;
                continue 2;
            }
        }
        
        /* Ok we got a complete char here */
        $this->map['p'][$charPos + $foundChars] = $startOffset + $i + $size;
        $i += $j - 1;
        ++$foundChars;
    }
    return $foundChars;
}