function CharacterStream::read

1 call to CharacterStream::read()

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

File

vendor/symfony/mime/CharacterStream.php, line 102

Class

CharacterStream

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

Namespace

Symfony\Component\Mime

Code

public function read(int $length) : ?string {
    if ($this->currentPos >= $this->charCount) {
        return null;
    }
    $length = $this->currentPos + $length > $this->charCount ? $this->charCount - $this->currentPos : $length;
    if ($this->fixedWidth > 0) {
        $len = $length * $this->fixedWidth;
        $ret = substr($this->data, $this->currentPos * $this->fixedWidth, $len);
        $this->currentPos += $length;
    }
    else {
        $end = $this->currentPos + $length;
        $end = min($end, $this->charCount);
        $ret = '';
        $start = 0;
        if ($this->currentPos > 0) {
            $start = $this->map['p'][$this->currentPos - 1];
        }
        $to = $start;
        for (; $this->currentPos < $end; ++$this->currentPos) {
            if (isset($this->map['i'][$this->currentPos])) {
                $ret .= substr($this->data, $start, $to - $start) . '?';
                $start = $this->map['p'][$this->currentPos];
            }
            else {
                $to = $this->map['p'][$this->currentPos];
            }
        }
        $ret .= substr($this->data, $start, $to - $start);
    }
    return $ret;
}