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<?php declare(strict_types = 1);
namespace PHPStan\PhpDocParser\Ast\ConstExpr;
use PHPStan\PhpDocParser\Ast\NodeAttributes;
use function addcslashes;
use function assert;
use function dechex;
use function ord;
use function preg_replace_callback;
use function sprintf;
use function str_pad;
use function strlen;
use const STR_PAD_LEFT;
class ConstExprStringNode implements ConstExprNode
{
public const SINGLE_QUOTED = 1;
public const DOUBLE_QUOTED = 2;
use NodeAttributes;
public string $value;
/** @var self::SINGLE_QUOTED|self::DOUBLE_QUOTED */
public $quoteType;
/**
* @param self::SINGLE_QUOTED|self::DOUBLE_QUOTED $quoteType
*/
public function __construct(string $value, int $quoteType)
{
$this->value = $value;
$this->quoteType = $quoteType;
}
public function __toString(): string
{
if ($this->quoteType === self::SINGLE_QUOTED) {
// from https://github.com/nikic/PHP-Parser/blob/0ffddce52d816f72d0efc4d9b02e276d3309ef01/lib/PhpParser/PrettyPrinter/Standard.php#L1007
return sprintf("'%s'", addcslashes($this->value, '\'\\'));
}
// from https://github.com/nikic/PHP-Parser/blob/0ffddce52d816f72d0efc4d9b02e276d3309ef01/lib/PhpParser/PrettyPrinter/Standard.php#L1010-L1040
return sprintf('"%s"', $this->escapeDoubleQuotedString());
}
private function escapeDoubleQuotedString(): string
{
$quote = '"';
$escaped = addcslashes($this->value, "\n\r\t\f\v$" . $quote . '\\');
// Escape control characters and non-UTF-8 characters.
// Regex based on https://stackoverflow.com/a/11709412/385378.
$regex = '/(
[\x00-\x08\x0E-\x1F] # Control characters
| [\xC0-\xC1] # Invalid UTF-8 Bytes
| [\xF5-\xFF] # Invalid UTF-8 Bytes
| \xE0(?=[\x80-\x9F]) # Overlong encoding of prior code point
| \xF0(?=[\x80-\x8F]) # Overlong encoding of prior code point
| [\xC2-\xDF](?![\x80-\xBF]) # Invalid UTF-8 Sequence Start
| [\xE0-\xEF](?![\x80-\xBF]{2}) # Invalid UTF-8 Sequence Start
| [\xF0-\xF4](?![\x80-\xBF]{3}) # Invalid UTF-8 Sequence Start
| (?<=[\x00-\x7F\xF5-\xFF])[\x80-\xBF] # Invalid UTF-8 Sequence Middle
| (?<![\xC2-\xDF]|[\xE0-\xEF]|[\xE0-\xEF][\x80-\xBF]|[\xF0-\xF4]|[\xF0-\xF4][\x80-\xBF]|[\xF0-\xF4][\x80-\xBF]{2})[\x80-\xBF] # Overlong Sequence
| (?<=[\xE0-\xEF])[\x80-\xBF](?![\x80-\xBF]) # Short 3 byte sequence
| (?<=[\xF0-\xF4])[\x80-\xBF](?![\x80-\xBF]{2}) # Short 4 byte sequence
| (?<=[\xF0-\xF4][\x80-\xBF])[\x80-\xBF](?![\x80-\xBF]) # Short 4 byte sequence (2)
)/x';
return preg_replace_callback($regex, static function ($matches) {
assert(strlen($matches[0]) === 1);
$hex = dechex(ord($matches[0]));
return '\\x' . str_pad($hex, 2, '0', STR_PAD_LEFT);
}, $escaped);
}
}
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