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<?php /* * This file is part of composer/pcre. * * (c) Composer <https://github.com/composer> * * For the full copyright and license information, please view * the LICENSE file that was distributed with this source code. */ namespace Composer\Pcre; class Preg { /** @internal */ public const ARRAY_MSG = '$subject as an array is not supported. You can use \'foreach\' instead.'; /** @internal */ public const INVALID_TYPE_MSG = '$subject must be a string, %s given.'; /** * @param non-empty-string $pattern * @param array<string|null> $matches Set by method * @param int-mask<PREG_UNMATCHED_AS_NULL> $flags PREG_UNMATCHED_AS_NULL is always set, no other flags are supported * @return 0|1 * * @param-out array<int|string, string|null> $matches */ public static function match(string $pattern, string $subject, ?array &$matches = null, int $flags = 0, int $offset = 0): int { self::checkOffsetCapture($flags, 'matchWithOffsets'); $result = preg_match($pattern, $subject, $matches, $flags | PREG_UNMATCHED_AS_NULL, $offset); if ($result === false) { throw PcreException::fromFunction('preg_match', $pattern); } return $result; } /** * Variant of `match()` which outputs non-null matches (or throws) * * @param non-empty-string $pattern * @param array<string> $matches Set by method * @param int-mask<PREG_UNMATCHED_AS_NULL> $flags PREG_UNMATCHED_AS_NULL is always set, no other flags are supported * @return 0|1 * @throws UnexpectedNullMatchException * * @param-out array<int|string, string> $matches */ public static function matchStrictGroups(string $pattern, string $subject, ?array &$matches = null, int $flags = 0, int $offset = 0): int { $result = self::match($pattern, $subject, $matchesInternal, $flags, $offset); $matches = self::enforceNonNullMatches($pattern, $matchesInternal, 'match'); return $result; } /** * Runs preg_match with PREG_OFFSET_CAPTURE * * @param non-empty-string $pattern * @param array<int|string, array{string|null, int}> $matches Set by method * @param int-mask<PREG_UNMATCHED_AS_NULL|PREG_OFFSET_CAPTURE> $flags PREG_UNMATCHED_AS_NULL and PREG_OFFSET_CAPTURE are always set, no other flags are supported * @return 0|1 * * @param-out array<int|string, array{string|null, int<-1, max>}> $matches */ public static function matchWithOffsets(string $pattern, string $subject, ?array &$matches, int $flags = 0, int $offset = 0): int { $result = preg_match($pattern, $subject, $matches, $flags | PREG_UNMATCHED_AS_NULL | PREG_OFFSET_CAPTURE, $offset); if ($result === false) { throw PcreException::fromFunction('preg_match', $pattern); } return $result; } /** * @param non-empty-string $pattern * @param array<int|string, list<string|null>> $matches Set by method * @param int-mask<PREG_UNMATCHED_AS_NULL> $flags PREG_UNMATCHED_AS_NULL is always set, no other flags are supported * @return 0|positive-int * * @param-out array<int|string, list<string|null>> $matches */ public static function matchAll(string $pattern, string $subject, ?array &$matches = null, int $flags = 0, int $offset = 0): int { self::checkOffsetCapture($flags, 'matchAllWithOffsets'); self::checkSetOrder($flags); $result = preg_match_all($pattern, $subject, $matches, $flags | PREG_UNMATCHED_AS_NULL, $offset); if (!is_int($result)) { // PHP < 8 may return null, 8+ returns int|false throw PcreException::fromFunction('preg_match_all', $pattern); } return $result; } /** * Variant of `match()` which outputs non-null matches (or throws) * * @param non-empty-string $pattern * @param array<int|string, list<string|null>> $matches Set by method * @param int-mask<PREG_UNMATCHED_AS_NULL> $flags PREG_UNMATCHED_AS_NULL is always set, no other flags are supported * @return 0|positive-int * @throws UnexpectedNullMatchException * * @param-out array<int|string, list<string>> $matches */ public static function matchAllStrictGroups(string $pattern, string $subject, ?array &$matches = null, int $flags = 0, int $offset = 0): int { $result = self::matchAll($pattern, $subject, $matchesInternal, $flags, $offset); $matches = self::enforceNonNullMatchAll($pattern, $matchesInternal, 'matchAll'); return $result; } /** * Runs preg_match_all with PREG_OFFSET_CAPTURE * * @param non-empty-string $pattern * @param array<int|string, list<array{string|null, int}>> $matches Set by method * @param int-mask<PREG_UNMATCHED_AS_NULL|PREG_OFFSET_CAPTURE> $flags PREG_UNMATCHED_AS_NULL and PREG_MATCH_OFFSET are always set, no other flags are supported * @return 0|positive-int * * @phpstan-param array<int|string, list<array{string|null, int<-1, max>}>> $matches */ public static function matchAllWithOffsets(string $pattern, string $subject, ?array &$matches, int $flags = 0, int $offset = 0): int { self::checkSetOrder($flags); $result = preg_match_all($pattern, $subject, $matches, $flags | PREG_UNMATCHED_AS_NULL | PREG_OFFSET_CAPTURE, $offset); if (!is_int($result)) { // PHP < 8 may return null, 8+ returns int|false throw PcreException::fromFunction('preg_match_all', $pattern); } return $result; } /** * @param string|string[] $pattern * @param string|string[] $replacement * @param string $subject * @param int $count Set by method * * @param-out int<0, max> $count */ public static function replace($pattern, $replacement, $subject, int $limit = -1, int &$count = null): string { if (!is_scalar($subject)) { if (is_array($subject)) { throw new \InvalidArgumentException(static::ARRAY_MSG); } throw new \TypeError(sprintf(static::INVALID_TYPE_MSG, gettype($subject))); } $result = preg_replace($pattern, $replacement, $subject, $limit, $count); if ($result === null) { throw PcreException::fromFunction('preg_replace', $pattern); } return $result; } /** * @param string|string[] $pattern * @param callable(array<int|string, string|null>): string $replacement * @param string $subject * @param int $count Set by method * @param int-mask<PREG_UNMATCHED_AS_NULL|PREG_OFFSET_CAPTURE> $flags PREG_OFFSET_CAPTURE is supported, PREG_UNMATCHED_AS_NULL is always set * * @param-out int<0, max> $count */ public static function replaceCallback($pattern, callable $replacement, $subject, int $limit = -1, int &$count = null, int $flags = 0): string { if (!is_scalar($subject)) { if (is_array($subject)) { throw new \InvalidArgumentException(static::ARRAY_MSG); } throw new \TypeError(sprintf(static::INVALID_TYPE_MSG, gettype($subject))); } $result = preg_replace_callback($pattern, $replacement, $subject, $limit, $count, $flags | PREG_UNMATCHED_AS_NULL); if ($result === null) { throw PcreException::fromFunction('preg_replace_callback', $pattern); } return $result; } /** * Variant of `replaceCallback()` which outputs non-null matches (or throws) * * @param string $pattern * @param callable(array<int|string, string>): string $replacement * @param string $subject * @param int $count Set by method * @param int-mask<PREG_UNMATCHED_AS_NULL|PREG_OFFSET_CAPTURE> $flags PREG_OFFSET_CAPTURE or PREG_UNMATCHED_AS_NULL, only available on PHP 7.4+ * * @param-out int<0, max> $count */ public static function replaceCallbackStrictGroups(string $pattern, callable $replacement, $subject, int $limit = -1, int &$count = null, int $flags = 0): string { return self::replaceCallback($pattern, function (array $matches) use ($pattern, $replacement) { return $replacement(self::enforceNonNullMatches($pattern, $matches, 'replaceCallback')); }, $subject, $limit, $count, $flags); } /** * @param array<string, callable(array<int|string, string|null>): string> $pattern * @param string $subject * @param int $count Set by method * @param int-mask<PREG_UNMATCHED_AS_NULL|PREG_OFFSET_CAPTURE> $flags PREG_OFFSET_CAPTURE is supported, PREG_UNMATCHED_AS_NULL is always set * * @param-out int<0, max> $count */ public static function replaceCallbackArray(array $pattern, $subject, int $limit = -1, int &$count = null, int $flags = 0): string { if (!is_scalar($subject)) { if (is_array($subject)) { throw new \InvalidArgumentException(static::ARRAY_MSG); } throw new \TypeError(sprintf(static::INVALID_TYPE_MSG, gettype($subject))); } $result = preg_replace_callback_array($pattern, $subject, $limit, $count, $flags | PREG_UNMATCHED_AS_NULL); if ($result === null) { $pattern = array_keys($pattern); throw PcreException::fromFunction('preg_replace_callback_array', $pattern); } return $result; } /** * @param int-mask<PREG_SPLIT_NO_EMPTY|PREG_SPLIT_DELIM_CAPTURE|PREG_SPLIT_OFFSET_CAPTURE> $flags PREG_SPLIT_NO_EMPTY or PREG_SPLIT_DELIM_CAPTURE * @return list<string> */ public static function split(string $pattern, string $subject, int $limit = -1, int $flags = 0): array { if (($flags & PREG_SPLIT_OFFSET_CAPTURE) !== 0) { throw new \InvalidArgumentException('PREG_SPLIT_OFFSET_CAPTURE is not supported as it changes the type of $matches, use splitWithOffsets() instead'); } $result = preg_split($pattern, $subject, $limit, $flags); if ($result === false) { throw PcreException::fromFunction('preg_split', $pattern); } return $result; } /** * @param int-mask<PREG_SPLIT_NO_EMPTY|PREG_SPLIT_DELIM_CAPTURE|PREG_SPLIT_OFFSET_CAPTURE> $flags PREG_SPLIT_NO_EMPTY or PREG_SPLIT_DELIM_CAPTURE, PREG_SPLIT_OFFSET_CAPTURE is always set * @return list<array{string, int}> * @phpstan-return list<array{string, int<0, max>}> */ public static function splitWithOffsets(string $pattern, string $subject, int $limit = -1, int $flags = 0): array { $result = preg_split($pattern, $subject, $limit, $flags | PREG_SPLIT_OFFSET_CAPTURE); if ($result === false) { throw PcreException::fromFunction('preg_split', $pattern); } return $result; } /** * @template T of string|\Stringable * @param string $pattern * @param array<T> $array * @param int-mask<PREG_GREP_INVERT> $flags PREG_GREP_INVERT * @return array<T> */ public static function grep(string $pattern, array $array, int $flags = 0): array { $result = preg_grep($pattern, $array, $flags); if ($result === false) { throw PcreException::fromFunction('preg_grep', $pattern); } return $result; } /** * Variant of match() which returns a bool instead of int * * @param non-empty-string $pattern * @param array<string|null> $matches Set by method * @param int-mask<PREG_UNMATCHED_AS_NULL> $flags PREG_UNMATCHED_AS_NULL is always set, no other flags are supported * * @param-out array<int|string, string|null> $matches */ public static function isMatch(string $pattern, string $subject, ?array &$matches = null, int $flags = 0, int $offset = 0): bool { return (bool) static::match($pattern, $subject, $matches, $flags, $offset); } /** * Variant of `isMatch()` which outputs non-null matches (or throws) * * @param non-empty-string $pattern * @param array<string> $matches Set by method * @param int-mask<PREG_UNMATCHED_AS_NULL> $flags PREG_UNMATCHED_AS_NULL is always set, no other flags are supported * @throws UnexpectedNullMatchException * * @param-out array<int|string, string> $matches */ public static function isMatchStrictGroups(string $pattern, string $subject, ?array &$matches = null, int $flags = 0, int $offset = 0): bool { return (bool) self::matchStrictGroups($pattern, $subject, $matches, $flags, $offset); } /** * Variant of matchAll() which returns a bool instead of int * * @param non-empty-string $pattern * @param array<int|string, list<string|null>> $matches Set by method * @param int-mask<PREG_UNMATCHED_AS_NULL> $flags PREG_UNMATCHED_AS_NULL is always set, no other flags are supported * * @param-out array<int|string, list<string|null>> $matches */ public static function isMatchAll(string $pattern, string $subject, ?array &$matches = null, int $flags = 0, int $offset = 0): bool { return (bool) static::matchAll($pattern, $subject, $matches, $flags, $offset); } /** * Variant of `isMatchAll()` which outputs non-null matches (or throws) * * @param non-empty-string $pattern * @param array<int|string, list<string>> $matches Set by method * @param int-mask<PREG_UNMATCHED_AS_NULL> $flags PREG_UNMATCHED_AS_NULL is always set, no other flags are supported * * @param-out array<int|string, list<string>> $matches */ public static function isMatchAllStrictGroups(string $pattern, string $subject, ?array &$matches = null, int $flags = 0, int $offset = 0): bool { return (bool) self::matchAllStrictGroups($pattern, $subject, $matches, $flags, $offset); } /** * Variant of matchWithOffsets() which returns a bool instead of int * * Runs preg_match with PREG_OFFSET_CAPTURE * * @param non-empty-string $pattern * @param array<int|string, array{string|null, int}> $matches Set by method * @param int-mask<PREG_UNMATCHED_AS_NULL> $flags PREG_UNMATCHED_AS_NULL is always set, no other flags are supported * * @param-out array<int|string, array{string|null, int<-1, max>}> $matches */ public static function isMatchWithOffsets(string $pattern, string $subject, ?array &$matches, int $flags = 0, int $offset = 0): bool { return (bool) static::matchWithOffsets($pattern, $subject, $matches, $flags, $offset); } /** * Variant of matchAllWithOffsets() which returns a bool instead of int * * Runs preg_match_all with PREG_OFFSET_CAPTURE * * @param non-empty-string $pattern * @param array<int|string, list<array{string|null, int}>> $matches Set by method * @param int-mask<PREG_UNMATCHED_AS_NULL> $flags PREG_UNMATCHED_AS_NULL is always set, no other flags are supported * * @param-out array<int|string, list<array{string|null, int<-1, max>}>> $matches */ public static function isMatchAllWithOffsets(string $pattern, string $subject, ?array &$matches, int $flags = 0, int $offset = 0): bool { return (bool) static::matchAllWithOffsets($pattern, $subject, $matches, $flags, $offset); } private static function checkOffsetCapture(int $flags, string $useFunctionName): void { if (($flags & PREG_OFFSET_CAPTURE) !== 0) { throw new \InvalidArgumentException('PREG_OFFSET_CAPTURE is not supported as it changes the type of $matches, use ' . $useFunctionName . '() instead'); } } private static function checkSetOrder(int $flags): void { if (($flags & PREG_SET_ORDER) !== 0) { throw new \InvalidArgumentException('PREG_SET_ORDER is not supported as it changes the type of $matches'); } } /** * @param array<int|string, string|null> $matches * @return array<int|string, string> * @throws UnexpectedNullMatchException */ private static function enforceNonNullMatches(string $pattern, array $matches, string $variantMethod) { foreach ($matches as $group => $match) { if (null === $match) { throw new UnexpectedNullMatchException('Pattern "'.$pattern.'" had an unexpected unmatched group "'.$group.'", make sure the pattern always matches or use '.$variantMethod.'() instead.'); } } /** @var array<string> */ return $matches; } /** * @param array<int|string, list<string|null>> $matches * @return array<int|string, list<string>> * @throws UnexpectedNullMatchException */ private static function enforceNonNullMatchAll(string $pattern, array $matches, string $variantMethod) { foreach ($matches as $group => $groupMatches) { foreach ($groupMatches as $match) { if (null === $match) { throw new UnexpectedNullMatchException('Pattern "'.$pattern.'" had an unexpected unmatched group "'.$group.'", make sure the pattern always matches or use '.$variantMethod.'() instead.'); } } } /** @var array<int|string, list<string>> */ return $matches; } }