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<?php |
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|
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/* |
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* This file is part of the Symfony package. |
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* |
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* (c) Fabien Potencier <fabien@symfony.com> |
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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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namespace Symfony\Component\String; |
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|
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use Symfony\Component\String\Exception\ExceptionInterface; |
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use Symfony\Component\String\Exception\InvalidArgumentException; |
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use Symfony\Component\String\Exception\RuntimeException; |
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|
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/** |
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* Represents a binary-safe string of bytes. |
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* |
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* @author Nicolas Grekas <p@tchwork.com> |
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* @author Hugo Hamon <hugohamon@neuf.fr> |
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* |
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* @throws ExceptionInterface |
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*/ |
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class ByteString extends AbstractString |
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{ |
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private const ALPHABET_ALPHANUMERIC = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789'; |
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|
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public function __construct(string $string = '') |
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{ |
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$this->string = $string; |
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} |
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|
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/* |
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* The following method was derived from code of the Hack Standard Library (v4.40 - 2020-05-03) |
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* |
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* https://github.com/hhvm/hsl/blob/80a42c02f036f72a42f0415e80d6b847f4bf62d5/src/random/private.php#L16 |
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* |
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* Code subject to the MIT license (https://github.com/hhvm/hsl/blob/master/LICENSE). |
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* |
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* Copyright (c) 2004-2020, Facebook, Inc. (https://www.facebook.com/) |
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*/ |
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|
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public static function fromRandom(int $length = 16, string $alphabet = null): self |
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{ |
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if ($length <= 0) { |
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throw new InvalidArgumentException(sprintf('A strictly positive length is expected, "%d" given.', $length)); |
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} |
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|
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$alphabet = $alphabet ?? self::ALPHABET_ALPHANUMERIC; |
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$alphabetSize = \strlen($alphabet); |
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$bits = (int) ceil(log($alphabetSize, 2.0)); |
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if ($bits <= 0 || $bits > 56) { |
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throw new InvalidArgumentException('The length of the alphabet must in the [2^1, 2^56] range.'); |
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} |
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|
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$ret = ''; |
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while ($length > 0) { |
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$urandomLength = (int) ceil(2 * $length * $bits / 8.0); |
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$data = random_bytes($urandomLength); |
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$unpackedData = 0; |
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$unpackedBits = 0; |
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for ($i = 0; $i < $urandomLength && $length > 0; ++$i) { |
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// Unpack 8 bits |
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$unpackedData = ($unpackedData << 8) | \ord($data[$i]); |
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$unpackedBits += 8; |
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|
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// While we have enough bits to select a character from the alphabet, keep |
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// consuming the random data |
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for (; $unpackedBits >= $bits && $length > 0; $unpackedBits -= $bits) { |
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$index = ($unpackedData & ((1 << $bits) - 1)); |
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$unpackedData >>= $bits; |
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// Unfortunately, the alphabet size is not necessarily a power of two. |
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// Worst case, it is 2^k + 1, which means we need (k+1) bits and we |
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// have around a 50% chance of missing as k gets larger |
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if ($index < $alphabetSize) { |
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$ret .= $alphabet[$index]; |
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--$length; |
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} |
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} |
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} |
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} |
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|
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return new static($ret); |
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} |
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|
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public function bytesAt(int $offset): array |
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{ |
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$str = $this->string[$offset] ?? ''; |
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|
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return '' === $str ? [] : [\ord($str)]; |
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} |
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|
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public function append(string ...$suffix): parent |
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{ |
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$str = clone $this; |
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$str->string .= 1 >= \count($suffix) ? ($suffix[0] ?? '') : implode('', $suffix); |
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|
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return $str; |
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} |
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|
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public function camel(): parent |
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{ |
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$str = clone $this; |
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$str->string = lcfirst(str_replace(' ', '', ucwords(preg_replace('/[^a-zA-Z0-9\x7f-\xff]++/', ' ', $this->string)))); |
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|
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return $str; |
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} |
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|
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public function chunk(int $length = 1): array |
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{ |
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if (1 > $length) { |
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throw new InvalidArgumentException('The chunk length must be greater than zero.'); |
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} |
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|
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if ('' === $this->string) { |
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return []; |
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} |
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|
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$str = clone $this; |
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$chunks = []; |
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|
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foreach (str_split($this->string, $length) as $chunk) { |
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$str->string = $chunk; |
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$chunks[] = clone $str; |
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} |
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|
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return $chunks; |
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} |
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|
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public function endsWith($suffix): bool |
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{ |
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if ($suffix instanceof parent) { |
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$suffix = $suffix->string; |
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} elseif (\is_array($suffix) || $suffix instanceof \Traversable) { |
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return parent::endsWith($suffix); |
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} else { |
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$suffix = (string) $suffix; |
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} |
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|
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return '' !== $suffix && \strlen($this->string) >= \strlen($suffix) && 0 === substr_compare($this->string, $suffix, -\strlen($suffix), null, $this->ignoreCase); |
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} |
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|
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public function equalsTo($string): bool |
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{ |
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if ($string instanceof parent) { |
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$string = $string->string; |
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} elseif (\is_array($string) || $string instanceof \Traversable) { |
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return parent::equalsTo($string); |
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} else { |
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$string = (string) $string; |
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} |
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|
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if ('' !== $string && $this->ignoreCase) { |
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return 0 === strcasecmp($string, $this->string); |
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} |
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|
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return $string === $this->string; |
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} |
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|
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public function folded(): parent |
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{ |
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$str = clone $this; |
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$str->string = strtolower($str->string); |
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|
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return $str; |
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} |
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|
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public function indexOf($needle, int $offset = 0): ?int |
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{ |
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if ($needle instanceof parent) { |
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$needle = $needle->string; |
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} elseif (\is_array($needle) || $needle instanceof \Traversable) { |
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return parent::indexOf($needle, $offset); |
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} else { |
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$needle = (string) $needle; |
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} |
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|
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if ('' === $needle) { |
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return null; |
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} |
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|
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$i = $this->ignoreCase ? stripos($this->string, $needle, $offset) : strpos($this->string, $needle, $offset); |
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|
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return false === $i ? null : $i; |
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} |
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|
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public function indexOfLast($needle, int $offset = 0): ?int |
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{ |
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if ($needle instanceof parent) { |
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$needle = $needle->string; |
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} elseif (\is_array($needle) || $needle instanceof \Traversable) { |
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return parent::indexOfLast($needle, $offset); |
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} else { |
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$needle = (string) $needle; |
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} |
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|
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if ('' === $needle) { |
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return null; |
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} |
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|
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$i = $this->ignoreCase ? strripos($this->string, $needle, $offset) : strrpos($this->string, $needle, $offset); |
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|
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return false === $i ? null : $i; |
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} |
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|
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public function isUtf8(): bool |
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{ |
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return '' === $this->string || preg_match('//u', $this->string); |
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} |
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|
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public function join(array $strings, string $lastGlue = null): parent |
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{ |
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$str = clone $this; |
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|
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$tail = null !== $lastGlue && 1 < \count($strings) ? $lastGlue.array_pop($strings) : ''; |
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$str->string = implode($this->string, $strings).$tail; |
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|
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return $str; |
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} |
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|
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public function length(): int |
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{ |
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return \strlen($this->string); |
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} |
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|
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public function lower(): parent |
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{ |
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$str = clone $this; |
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$str->string = strtolower($str->string); |
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|
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return $str; |
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} |
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|
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public function match(string $regexp, int $flags = 0, int $offset = 0): array |
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{ |
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$match = ((PREG_PATTERN_ORDER | PREG_SET_ORDER) & $flags) ? 'preg_match_all' : 'preg_match'; |
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|
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if ($this->ignoreCase) { |
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$regexp .= 'i'; |
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} |
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|
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set_error_handler(static function ($t, $m) { throw new InvalidArgumentException($m); }); |
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|
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try { |
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if (false === $match($regexp, $this->string, $matches, $flags | PREG_UNMATCHED_AS_NULL, $offset)) { |
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$lastError = preg_last_error(); |
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|
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foreach (get_defined_constants(true)['pcre'] as $k => $v) { |
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if ($lastError === $v && '_ERROR' === substr($k, -6)) { |
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throw new RuntimeException('Matching failed with '.$k.'.'); |
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} |
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} |
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|
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throw new RuntimeException('Matching failed with unknown error code.'); |
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} |
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} finally { |
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restore_error_handler(); |
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} |
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|
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return $matches; |
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} |
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|
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public function padBoth(int $length, string $padStr = ' '): parent |
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{ |
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$str = clone $this; |
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$str->string = str_pad($this->string, $length, $padStr, STR_PAD_BOTH); |
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|
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return $str; |
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} |
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|
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public function padEnd(int $length, string $padStr = ' '): parent |
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{ |
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$str = clone $this; |
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$str->string = str_pad($this->string, $length, $padStr, STR_PAD_RIGHT); |
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|
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return $str; |
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} |
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|
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public function padStart(int $length, string $padStr = ' '): parent |
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{ |
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$str = clone $this; |
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$str->string = str_pad($this->string, $length, $padStr, STR_PAD_LEFT); |
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|
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return $str; |
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} |
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|
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public function prepend(string ...$prefix): parent |
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{ |
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$str = clone $this; |
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$str->string = (1 >= \count($prefix) ? ($prefix[0] ?? '') : implode('', $prefix)).$str->string; |
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|
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return $str; |
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} |
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|
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public function replace(string $from, string $to): parent |
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{ |
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$str = clone $this; |
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|
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if ('' !== $from) { |
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$str->string = $this->ignoreCase ? str_ireplace($from, $to, $this->string) : str_replace($from, $to, $this->string); |
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} |
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|
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return $str; |
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} |
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|
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public function replaceMatches(string $fromRegexp, $to): parent |
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{ |
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if ($this->ignoreCase) { |
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$fromRegexp .= 'i'; |
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} |
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|
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if (\is_array($to)) { |
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if (!\is_callable($to)) { |
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throw new \TypeError(sprintf('Argument 2 passed to "%s::replaceMatches()" must be callable, array given.', static::class)); |
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} |
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|
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$replace = 'preg_replace_callback'; |
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} else { |
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$replace = $to instanceof \Closure ? 'preg_replace_callback' : 'preg_replace'; |
| 322 |
} |
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|
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set_error_handler(static function ($t, $m) { throw new InvalidArgumentException($m); }); |
| 325 |
|
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try { |
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if (null === $string = $replace($fromRegexp, $to, $this->string)) { |
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$lastError = preg_last_error(); |
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|
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foreach (get_defined_constants(true)['pcre'] as $k => $v) { |
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if ($lastError === $v && '_ERROR' === substr($k, -6)) { |
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throw new RuntimeException('Matching failed with '.$k.'.'); |
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} |
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} |
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|
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throw new RuntimeException('Matching failed with unknown error code.'); |
| 337 |
} |
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} finally { |
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restore_error_handler(); |
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} |
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|
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$str = clone $this; |
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$str->string = $string; |
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|
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return $str; |
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} |
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|
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public function reverse(): parent |
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{ |
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$str = clone $this; |
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$str->string = strrev($str->string); |
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|
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return $str; |
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} |
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|
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public function slice(int $start = 0, int $length = null): parent |
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{ |
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$str = clone $this; |
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$str->string = (string) substr($this->string, $start, $length ?? PHP_INT_MAX); |
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|
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return $str; |
| 362 |
} |
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|
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public function snake(): parent |
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{ |
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$str = $this->camel()->title(); |
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$str->string = strtolower(preg_replace(['/([A-Z]+)([A-Z][a-z])/', '/([a-z\d])([A-Z])/'], '\1_\2', $str->string)); |
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|
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return $str; |
| 370 |
} |
| 371 |
|
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public function splice(string $replacement, int $start = 0, int $length = null): parent |
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{ |
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$str = clone $this; |
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$str->string = substr_replace($this->string, $replacement, $start, $length ?? PHP_INT_MAX); |
| 376 |
|
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return $str; |
| 378 |
} |
| 379 |
|
| 380 |
public function split(string $delimiter, int $limit = null, int $flags = null): array |
| 381 |
{ |
| 382 |
if (1 > $limit = $limit ?? PHP_INT_MAX) { |
| 383 |
throw new InvalidArgumentException('Split limit must be a positive integer.'); |
| 384 |
} |
| 385 |
|
| 386 |
if ('' === $delimiter) { |
| 387 |
throw new InvalidArgumentException('Split delimiter is empty.'); |
| 388 |
} |
| 389 |
|
| 390 |
if (null !== $flags) { |
| 391 |
return parent::split($delimiter, $limit, $flags); |
| 392 |
} |
| 393 |
|
| 394 |
$str = clone $this; |
| 395 |
$chunks = $this->ignoreCase |
| 396 |
? preg_split('{'.preg_quote($delimiter).'}iD', $this->string, $limit) |
| 397 |
: explode($delimiter, $this->string, $limit); |
| 398 |
|
| 399 |
foreach ($chunks as &$chunk) { |
| 400 |
$str->string = $chunk; |
| 401 |
$chunk = clone $str; |
| 402 |
} |
| 403 |
|
| 404 |
return $chunks; |
| 405 |
} |
| 406 |
|
| 407 |
public function startsWith($prefix): bool |
| 408 |
{ |
| 409 |
if ($prefix instanceof parent) { |
| 410 |
$prefix = $prefix->string; |
| 411 |
} elseif (!\is_string($prefix)) { |
| 412 |
return parent::startsWith($prefix); |
| 413 |
} |
| 414 |
|
| 415 |
return '' !== $prefix && 0 === ($this->ignoreCase ? strncasecmp($this->string, $prefix, \strlen($prefix)) : strncmp($this->string, $prefix, \strlen($prefix))); |
| 416 |
} |
| 417 |
|
| 418 |
public function title(bool $allWords = false): parent |
| 419 |
{ |
| 420 |
$str = clone $this; |
| 421 |
$str->string = $allWords ? ucwords($str->string) : ucfirst($str->string); |
| 422 |
|
| 423 |
return $str; |
| 424 |
} |
| 425 |
|
| 426 |
public function toUnicodeString(string $fromEncoding = null): UnicodeString |
| 427 |
{ |
| 428 |
return new UnicodeString($this->toCodePointString($fromEncoding)->string); |
| 429 |
} |
| 430 |
|
| 431 |
public function toCodePointString(string $fromEncoding = null): CodePointString |
| 432 |
{ |
| 433 |
$u = new CodePointString(); |
| 434 |
|
| 435 |
if (\in_array($fromEncoding, [null, 'utf8', 'utf-8', 'UTF8', 'UTF-8'], true) && preg_match('//u', $this->string)) { |
| 436 |
$u->string = $this->string; |
| 437 |
|
| 438 |
return $u; |
| 439 |
} |
| 440 |
|
| 441 |
set_error_handler(static function ($t, $m) { throw new InvalidArgumentException($m); }); |
| 442 |
|
| 443 |
try { |
| 444 |
try { |
| 445 |
$validEncoding = false !== mb_detect_encoding($this->string, $fromEncoding ?? 'Windows-1252', true); |
| 446 |
} catch (InvalidArgumentException $e) { |
| 447 |
if (!\function_exists('iconv')) { |
| 448 |
throw $e; |
| 449 |
} |
| 450 |
|
| 451 |
$u->string = iconv($fromEncoding ?? 'Windows-1252', 'UTF-8', $this->string); |
| 452 |
|
| 453 |
return $u; |
| 454 |
} |
| 455 |
} finally { |
| 456 |
restore_error_handler(); |
| 457 |
} |
| 458 |
|
| 459 |
if (!$validEncoding) { |
| 460 |
throw new InvalidArgumentException(sprintf('Invalid "%s" string.', $fromEncoding ?? 'Windows-1252')); |
| 461 |
} |
| 462 |
|
| 463 |
$u->string = mb_convert_encoding($this->string, 'UTF-8', $fromEncoding ?? 'Windows-1252'); |
| 464 |
|
| 465 |
return $u; |
| 466 |
} |
| 467 |
|
| 468 |
public function trim(string $chars = " \t\n\r\0\x0B\x0C"): parent |
| 469 |
{ |
| 470 |
$str = clone $this; |
| 471 |
$str->string = trim($str->string, $chars); |
| 472 |
|
| 473 |
return $str; |
| 474 |
} |
| 475 |
|
| 476 |
public function trimEnd(string $chars = " \t\n\r\0\x0B\x0C"): parent |
| 477 |
{ |
| 478 |
$str = clone $this; |
| 479 |
$str->string = rtrim($str->string, $chars); |
| 480 |
|
| 481 |
return $str; |
| 482 |
} |
| 483 |
|
| 484 |
public function trimStart(string $chars = " \t\n\r\0\x0B\x0C"): parent |
| 485 |
{ |
| 486 |
$str = clone $this; |
| 487 |
$str->string = ltrim($str->string, $chars); |
| 488 |
|
| 489 |
return $str; |
| 490 |
} |
| 491 |
|
| 492 |
public function upper(): parent |
| 493 |
{ |
| 494 |
$str = clone $this; |
| 495 |
$str->string = strtoupper($str->string); |
| 496 |
|
| 497 |
return $str; |
| 498 |
} |
| 499 |
|
| 500 |
public function width(bool $ignoreAnsiDecoration = true): int |
| 501 |
{ |
| 502 |
$string = preg_match('//u', $this->string) ? $this->string : preg_replace('/[\x80-\xFF]/', '?', $this->string); |
| 503 |
|
| 504 |
return (new CodePointString($string))->width($ignoreAnsiDecoration); |
| 505 |
} |
| 506 |
} |
| 507 |
|
