function TokenizerEscaping::replaceUnicodeSequences

1 call to TokenizerEscaping::replaceUnicodeSequences()

TokenizerEscaping::escapeUnicode in vendor/symfony/css-selector/Parser/Tokenizer/TokenizerEscaping.php

File

vendor/symfony/css-selector/Parser/Tokenizer/TokenizerEscaping.php, line 45

Class

TokenizerEscaping

CSS selector tokenizer escaping applier.

Namespace

Symfony\Component\CssSelector\Parser\Tokenizer

Code

private function replaceUnicodeSequences(string $value) : string {
    return preg_replace_callback($this->patterns
        ->getUnicodeEscapePattern(), function ($match) {
        $c = hexdec($match[1]);
        if (0x80 > ($c %= 0x200000)) {
            return \chr($c);
        }
        if (0x800 > $c) {
            return \chr(0xc0 | $c >> 6) . \chr(0x80 | $c & 0x3f);
        }
        if (0x10000 > $c) {
            return \chr(0xe0 | $c >> 12) . \chr(0x80 | $c >> 6 & 0x3f) . \chr(0x80 | $c & 0x3f);
        }
        return '';
    }, $value);
}