<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Yaml;
use Symfony\Component\Yaml\Exception\DumpException;
use Symfony\Component\Yaml\Exception\ParseException;
use Symfony\Component\Yaml\Tag\TaggedValue;
/**
* Inline implements a YAML parser/dumper for the YAML inline syntax.
*
* @author Fabien Potencier <fabien@symfony.com>
*
* @internal
*/
class Inline
{
public const REGEX_QUOTED_STRING = '(?:"([^"\\\\]*+(?:\\\\.[^"\\\\]*+)*+)"|\'([^\']*+(?:\'\'[^\']*+)*+)\')';
public static int $parsedLineNumber = -1;
public static ?string $parsedFilename = null;
private static bool $exceptionOnInvalidType = false;
private static bool $objectSupport = false;
private static bool $objectForMap = false;
private static bool $constantSupport = false;
public static function initialize(int $flags, int $parsedLineNumber = null, string $parsedFilename = null)
{
self::$exceptionOnInvalidType = (bool) (Yaml::PARSE_EXCEPTION_ON_INVALID_TYPE & $flags);
self::$objectSupport = (bool) (Yaml::PARSE_OBJECT & $flags);
self::$objectForMap = (bool) (Yaml::PARSE_OBJECT_FOR_MAP & $flags);
self::$constantSupport = (bool) (Yaml::PARSE_CONSTANT & $flags);
self::$parsedFilename = $parsedFilename;
if (null !== $parsedLineNumber) {
self::$parsedLineNumber = $parsedLineNumber;
}
}
/**
* Converts a YAML string to a PHP value.
*
* @param int $flags A bit field of Yaml::PARSE_* constants to customize the YAML parser behavior
* @param array $references Mapping of variable names to values
*
* @throws ParseException
*/
public static function parse(string $value = null, int $flags = 0, array &$references = []): mixed
{
self::initialize($flags);
$value = trim($value);
if ('' === $value) {
return '';
}
$i = 0;
$tag = self::parseTag($value, $i, $flags);
switch ($value[$i]) {
case '[':
$result = self::parseSequence($value, $flags, $i, $references);
++$i;
break;
case '{':
$result = self::parseMapping($value, $flags, $i, $references);
++$i;
break;
default:
$result = self::parseScalar($value, $flags, null, $i, true, $references);
}
// some comments are allowed at the end
if (preg_replace('/\s*#.*$/A', '', substr($value, $i))) {
throw new ParseException(sprintf('Unexpected characters near "%s".', substr($value, $i)), self::$parsedLineNumber + 1, $value, self::$parsedFilename);
}
if (null !== $tag && '' !== $tag) {
return new TaggedValue($tag, $result);
}
return $result;
}
/**
* Dumps a given PHP variable to a YAML string.
*
* @param mixed $value The PHP variable to convert
* @param int $flags A bit field of Yaml::DUMP_* constants to customize the dumped YAML string
*
* @throws DumpException When trying to dump PHP resource
*/
public static function dump(mixed $value, int $flags = 0): string
{
switch (true) {
case \is_resource($value):
if (Yaml::DUMP_EXCEPTION_ON_INVALID_TYPE & $flags) {
throw new DumpException(sprintf('Unable to dump PHP resources in a YAML file ("%s").', get_resource_type($value)));
}
return self::dumpNull($flags);
case $value instanceof \DateTimeInterface:
return $value->format('c');
case $value instanceof \UnitEnum:
return sprintf('!php/const %s::%s', $value::class, $value->name);
case \is_object($value):
if ($value instanceof TaggedValue) {
return '!'.$value->getTag().' '.self::dump($value->getValue(), $flags);
}
if (Yaml::DUMP_OBJECT & $flags) {
return '!php/object '.self::dump(serialize($value));
}
if (Yaml::DUMP_OBJECT_AS_MAP & $flags && ($value instanceof \stdClass || $value instanceof \ArrayObject)) {
return self::dumpHashArray($value, $flags);
}
if (Yaml::DUMP_EXCEPTION_ON_INVALID_TYPE & $flags) {
throw new DumpException('Object support when dumping a YAML file has been disabled.');
}
return self::dumpNull($flags);
case \is_array($value):
return self::dumpArray($value, $flags);
case null === $value:
return self::dumpNull($flags);
case true === $value:
return 'true';
case false === $value:
return 'false';
case \is_int($value):
return $value;
case is_numeric($value) && false === strpbrk($value, "\f\n\r\t\v"):
$locale = setlocale(\LC_NUMERIC, 0);
if (false !== $locale) {
setlocale(\LC_NUMERIC, 'C');
}
if (\is_float($value)) {
$repr = (string) $value;
if (is_infinite($value)) {
$repr = str_ireplace('INF', '.Inf', $repr);
} elseif (floor($value) == $value && $repr == $value) {
// Preserve float data type since storing a whole number will result in integer value.
if (!str_contains($repr, 'E')) {
$repr = $repr.'.0';
}
}
} else {
$repr = \is_string($value) ? "'$value'" : (string) $value;
}
if (false !== $locale) {
setlocale(\LC_NUMERIC, $locale);
}
return $repr;
case '' == $value:
return "''";
case self::isBinaryString($value):
return '!!binary '.base64_encode($value);
case Escaper::requiresDoubleQuoting($value):
return Escaper::escapeWithDoubleQuotes($value);
case Escaper::requiresSingleQuoting($value):
$singleQuoted = Escaper::escapeWithSingleQuotes($value);
if (!str_contains($value, "'")) {
return $singleQuoted;
}
// Attempt double-quoting the string instead to see if it's more efficient.
$doubleQuoted = Escaper::escapeWithDoubleQuotes($value);
return \strlen($doubleQuoted) < \strlen($singleQuoted) ? $doubleQuoted : $singleQuoted;
case Parser::preg_match('{^[0-9]+[_0-9]*$}', $value):
case Parser::preg_match(self::getHexRegex(), $value):
case Parser::preg_match(self::getTimestampRegex(), $value):
return Escaper::escapeWithSingleQuotes($value);
default:
return $value;
}
}
/**
* Check if given array is hash or just normal indexed array.
*/
public static function isHash(array|\ArrayObject|\stdClass $value): bool
{
if ($value instanceof \stdClass || $value instanceof \ArrayObject) {
return true;
}
$expectedKey = 0;
foreach ($value as $key => $val) {
if ($key !== $expectedKey++) {
return true;
}
}
return false;
}
/**
* Dumps a PHP array to a YAML string.
*
* @param array $value The PHP array to dump
* @param int $flags A bit field of Yaml::DUMP_* constants to customize the dumped YAML string
*/
private static function dumpArray(array $value, int $flags): string
{
// array
if (($value || Yaml::DUMP_EMPTY_ARRAY_AS_SEQUENCE & $flags) && !self::isHash($value)) {
$output = [];
foreach ($value as $val) {
$output[] = self::dump($val, $flags);
}
return sprintf('[%s]', implode(', ', $output));
}
return self::dumpHashArray($value, $flags);
}
/**
* Dumps hash array to a YAML string.
*
* @param array|\ArrayObject|\stdClass $value The hash array to dump
* @param int $flags A bit field of Yaml::DUMP_* constants to customize the dumped YAML string
*/
private static function dumpHashArray(array|\ArrayObject|\stdClass $value, int $flags): string
{
$output = [];
foreach ($value as $key => $val) {
$output[] = sprintf('%s: %s', self::dump($key, $flags), self::dump($val, $flags));
}
return sprintf('{ %s }', implode(', ', $output));
}
private static function dumpNull(int $flags): string
{
if (Yaml::DUMP_NULL_AS_TILDE & $flags) {
return '~';
}
return 'null';
}
/**
* Parses a YAML scalar.
*
* @throws ParseException When malformed inline YAML string is parsed
*/
public static function parseScalar(string $scalar, int $flags = 0, array $delimiters = null, int &$i = 0, bool $evaluate = true, array &$references = [], bool &$isQuoted = null): mixed
{
if (\in_array($scalar[$i], ['"', "'"], true)) {
// quoted scalar
$isQuoted = true;
$output = self::parseQuotedScalar($scalar, $i);
if (null !== $delimiters) {
$tmp = ltrim(substr($scalar, $i), " \n");
if ('' === $tmp) {
throw new ParseException(sprintf('Unexpected end of line, expected one of "%s".', implode('', $delimiters)), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
}
if (!\in_array($tmp[0], $delimiters)) {
throw new ParseException(sprintf('Unexpected characters (%s).', substr($scalar, $i)), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
}
}
} else {
// "normal" string
$isQuoted = false;
if (!$delimiters) {
$output = substr($scalar, $i);
$i += \strlen($output);
// remove comments
if (Parser::preg_match('/[ \t]+#/', $output, $match, \PREG_OFFSET_CAPTURE)) {
$output = substr($output, 0, $match[0][1]);
}
} elseif (Parser::preg_match('/^(.*?)('.implode('|', $delimiters).')/', substr($scalar, $i), $match)) {
$output = $match[1];
$i += \strlen($output);
$output = trim($output);
} else {
throw new ParseException(sprintf('Malformed inline YAML string: "%s".', $scalar), self::$parsedLineNumber + 1, null, self::$parsedFilename);
}
// a non-quoted string cannot start with @ or ` (reserved) nor with a scalar indicator (| or >)
if ($output && ('@' === $output[0] || '`' === $output[0] || '|' === $output[0] || '>' === $output[0] || '%' === $output[0])) {
throw new ParseException(sprintf('The reserved indicator "%s" cannot start a plain scalar; you need to quote the scalar.', $output[0]), self::$parsedLineNumber + 1, $output, self::$parsedFilename);
}
if ($evaluate) {
$output = self::evaluateScalar($output, $flags, $references, $isQuoted);
}
}
return $output;
}
/**
* Parses a YAML quoted scalar.
*
* @throws ParseException When malformed inline YAML string is parsed
*/
private static function parseQuotedScalar(string $scalar, int &$i = 0): string
{
if (!Parser::preg_match('/'.self::REGEX_QUOTED_STRING.'/Au', substr($scalar, $i), $match)) {
throw new ParseException(sprintf('Malformed inline YAML string: "%s".', substr($scalar, $i)), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
}
$output = substr($match[0], 1, -1);
$unescaper = new Unescaper();
if ('"' == $scalar[$i]) {
$output = $unescaper->unescapeDoubleQuotedString($output);
} else {
$output = $unescaper->unescapeSingleQuotedString($output);
}
$i += \strlen($match[0]);
return $output;
}
/**
* Parses a YAML sequence.
*
* @throws ParseException When malformed inline YAML string is parsed
*/
private static function parseSequence(string $sequence, int $flags, int &$i = 0, array &$references = []): array
{
$output = [];
$len = \strlen($sequence);
++$i;
// [foo, bar, ...]
while ($i < $len) {
if (']' === $sequence[$i]) {
return $output;
}
if (',' === $sequence[$i] || ' ' === $sequence[$i]) {
++$i;
continue;
}
$tag = self::parseTag($sequence, $i, $flags);
switch ($sequence[$i]) {
case '[':
// nested sequence
$value = self::parseSequence($sequence, $flags, $i, $references);
break;
case '{':
// nested mapping
$value = self::parseMapping($sequence, $flags, $i, $references);
break;
default:
$value = self::parseScalar($sequence, $flags, [',', ']'], $i, null === $tag, $references, $isQuoted);
// the value can be an array if a reference has been resolved to an array var
if (\is_string($value) && !$isQuoted && str_contains($value, ': ')) {
// embedded mapping?
try {
$pos = 0;
$value = self::parseMapping('{'.$value.'}', $flags, $pos, $references);
} catch (\InvalidArgumentException) {
// no, it's not
}
}
if (!$isQuoted && \is_string($value) && '' !== $value && '&' === $value[0] && Parser::preg_match(Parser::REFERENCE_PATTERN, $value, $matches)) {
$references[$matches['ref']] = $matches['value'];
$value = $matches['value'];
}
--$i;
}
if (null !== $tag && '' !== $tag) {
$value = new TaggedValue($tag, $value);
}
$output[] = $value;
++$i;
}
throw new ParseException(sprintf('Malformed inline YAML string: "%s".', $sequence), self::$parsedLineNumber + 1, null, self::$parsedFilename);
}
/**
* Parses a YAML mapping.
*
* @throws ParseException When malformed inline YAML string is parsed
*/
private static function parseMapping(string $mapping, int $flags, int &$i = 0, array &$references = []): array|\stdClass
{
$output = [];
$len = \strlen($mapping);
++$i;
$allowOverwrite = false;
// {foo: bar, bar:foo, ...}
while ($i < $len) {
switch ($mapping[$i]) {
case ' ':
case ',':
case "\n":
++$i;
continue 2;
case '}':
if (self::$objectForMap) {
return (object) $output;
}
return $output;
}
// key
$offsetBeforeKeyParsing = $i;
$isKeyQuoted = \in_array($mapping[$i], ['"', "'"], true);
$key = self::parseScalar($mapping, $flags, [':', ' '], $i, false);
if ($offsetBeforeKeyParsing === $i) {
throw new ParseException('Missing mapping key.', self::$parsedLineNumber + 1, $mapping);
}
if ('!php/const' === $key || '!php/enum' === $key) {
$key .= ' '.self::parseScalar($mapping, $flags, [':'], $i, false);
$key = self::evaluateScalar($key, $flags);
}
if (false === $i = strpos($mapping, ':', $i)) {
break;
}
if (!$isKeyQuoted) {
$evaluatedKey = self::evaluateScalar($key, $flags, $references);
if ('' !== $key && $evaluatedKey !== $key && !\is_string($evaluatedKey) && !\is_int($evaluatedKey)) {
throw new ParseException('Implicit casting of incompatible mapping keys to strings is not supported. Quote your evaluable mapping keys instead.', self::$parsedLineNumber + 1, $mapping);
}
}
if (!$isKeyQuoted && (!isset($mapping[$i + 1]) || !\in_array($mapping[$i + 1], [' ', ',', '[', ']', '{', '}', "\n"], true))) {
throw new ParseException('Colons must be followed by a space or an indication character (i.e. " ", ",", "[", "]", "{", "}").', self::$parsedLineNumber + 1, $mapping);
}
if ('<<' === $key) {
$allowOverwrite = true;
}
while ($i < $len) {
if (':' === $mapping[$i] || ' ' === $mapping[$i] || "\n" === $mapping[$i]) {
++$i;
continue;
}
$tag = self::parseTag($mapping, $i, $flags);
switch ($mapping[$i]) {
case '[':
// nested sequence
$value = self::parseSequence($mapping, $flags, $i, $references);
// Spec: Keys MUST be unique; first one wins.
// Parser cannot abort this mapping earlier, since lines
// are processed sequentially.
// But overwriting is allowed when a merge node is used in current block.
if ('<<' === $key) {
foreach ($value as $parsedValue) {
$output += $parsedValue;
}
} elseif ($allowOverwrite || !isset($output[$key])) {
if (null !== $tag) {
$output[$key] = new TaggedValue($tag, $value);
} else {
$output[$key] = $value;
}
} elseif (isset($output[$key])) {
throw new ParseException(sprintf('Duplicate key "%s" detected.', $key), self::$parsedLineNumber + 1, $mapping);
}
break;
case '{':
// nested mapping
$value = self::parseMapping($mapping, $flags, $i, $references);
// Spec: Keys MUST be unique; first one wins.
// Parser cannot abort this mapping earlier, since lines
// are processed sequentially.
// But overwriting is allowed when a merge node is used in current block.
if ('<<' === $key) {
$output += $value;
} elseif ($allowOverwrite || !isset($output[$key])) {
if (null !== $tag) {
$output[$key] = new TaggedValue($tag, $value);
} else {
$output[$key] = $value;
}
} elseif (isset($output[$key])) {
throw new ParseException(sprintf('Duplicate key "%s" detected.', $key), self::$parsedLineNumber + 1, $mapping);
}
break;
default:
$value = self::parseScalar($mapping, $flags, [',', '}', "\n"], $i, null === $tag, $references, $isValueQuoted);
// Spec: Keys MUST be unique; first one wins.
// Parser cannot abort this mapping earlier, since lines
// are processed sequentially.
// But overwriting is allowed when a merge node is used in current block.
if ('<<' === $key) {
$output += $value;
} elseif ($allowOverwrite || !isset($output[$key])) {
if (!$isValueQuoted && \is_string($value) && '' !== $value && '&' === $value[0] && Parser::preg_match(Parser::REFERENCE_PATTERN, $value, $matches)) {
$references[$matches['ref']] = $matches['value'];
$value = $matches['value'];
}
if (null !== $tag) {
$output[$key] = new TaggedValue($tag, $value);
} else {
$output[$key] = $value;
}
} elseif (isset($output[$key])) {
throw new ParseException(sprintf('Duplicate key "%s" detected.', $key), self::$parsedLineNumber + 1, $mapping);
}
--$i;
}
++$i;
continue 2;
}
}
throw new ParseException(sprintf('Malformed inline YAML string: "%s".', $mapping), self::$parsedLineNumber + 1, null, self::$parsedFilename);
}
/**
* Evaluates scalars and replaces magic values.
*
* @throws ParseException when object parsing support was disabled and the parser detected a PHP object or when a reference could not be resolved
*/
private static function evaluateScalar(string $scalar, int $flags, array &$references = [], bool &$isQuotedString = null): mixed
{
$isQuotedString = false;
$scalar = trim($scalar);
if (str_starts_with($scalar, '*')) {
if (false !== $pos = strpos($scalar, '#')) {
$value = substr($scalar, 1, $pos - 2);
} else {
$value = substr($scalar, 1);
}
// an unquoted *
if (false === $value || '' === $value) {
throw new ParseException('A reference must contain at least one character.', self::$parsedLineNumber + 1, $value, self::$parsedFilename);
}
if (!\array_key_exists($value, $references)) {
throw new ParseException(sprintf('Reference "%s" does not exist.', $value), self::$parsedLineNumber + 1, $value, self::$parsedFilename);
}
return $references[$value];
}
$scalarLower = strtolower($scalar);
switch (true) {
case 'null' === $scalarLower:
case '' === $scalar:
case '~' === $scalar:
return null;
case 'true' === $scalarLower:
return true;
case 'false' === $scalarLower:
return false;
case '!' === $scalar[0]:
switch (true) {
case str_starts_with($scalar, '!!str '):
$s = (string) substr($scalar, 6);
if (\in_array($s[0] ?? '', ['"', "'"], true)) {
$isQuotedString = true;
$s = self::parseQuotedScalar($s);
}
return $s;
case str_starts_with($scalar, '! '):
return substr($scalar, 2);
case str_starts_with($scalar, '!php/object'):
if (self::$objectSupport) {
if (!isset($scalar[12])) {
throw new ParseException('Missing value for tag "!php/object".', self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
}
return unserialize(self::parseScalar(substr($scalar, 12)));
}
if (self::$exceptionOnInvalidType) {
throw new ParseException('Object support when parsing a YAML file has been disabled.', self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
}
return null;
case str_starts_with($scalar, '!php/const'):
if (self::$constantSupport) {
if (!isset($scalar[11])) {
throw new ParseException('Missing value for tag "!php/const".', self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
}
$i = 0;
if (\defined($const = self::parseScalar(substr($scalar, 11), 0, null, $i, false))) {
return \constant($const);
}
throw new ParseException(sprintf('The constant "%s" is not defined.', $const), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
}
if (self::$exceptionOnInvalidType) {
throw new ParseException(sprintf('The string "%s" could not be parsed as a constant. Did you forget to pass the "Yaml::PARSE_CONSTANT" flag to the parser?', $scalar), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
}
return null;
case str_starts_with($scalar, '!php/enum'):
if (self::$constantSupport) {
if (!isset($scalar[11])) {
throw new ParseException('Missing value for tag "!php/enum".', self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
}
$i = 0;
$enum = self::parseScalar(substr($scalar, 10), 0, null, $i, false);
if ($useValue = str_ends_with($enum, '->value')) {
$enum = substr($enum, 0, -7);
}
if (!\defined($enum)) {
throw new ParseException(sprintf('The enum "%s" is not defined.', $enum), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
}
$value = \constant($enum);
if (!$value instanceof \UnitEnum) {
throw new ParseException(sprintf('The string "%s" is not the name of a valid enum.', $enum), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
}
if (!$useValue) {
return $value;
}
if (!$value instanceof \BackedEnum) {
throw new ParseException(sprintf('The enum "%s" defines no value next to its name.', $enum), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
}
return $value->value;
}
if (self::$exceptionOnInvalidType) {
throw new ParseException(sprintf('The string "%s" could not be parsed as an enum. Did you forget to pass the "Yaml::PARSE_CONSTANT" flag to the parser?', $scalar), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
}
return null;
case str_starts_with($scalar, '!!float '):
return (float) substr($scalar, 8);
case str_starts_with($scalar, '!!binary '):
return self::evaluateBinaryScalar(substr($scalar, 9));
}
throw new ParseException(sprintf('The string "%s" could not be parsed as it uses an unsupported built-in tag.', $scalar), self::$parsedLineNumber, $scalar, self::$parsedFilename);
case preg_match('/^(?:\+|-)?0o(?P<value>[0-7_]++)$/', $scalar, $matches):
$value = str_replace('_', '', $matches['value']);
if ('-' === $scalar[0]) {
return -octdec($value);
}
return octdec($value);
case \in_array($scalar[0], ['+', '-', '.'], true) || is_numeric($scalar[0]):
if (Parser::preg_match('{^[+-]?[0-9][0-9_]*$}', $scalar)) {
$scalar = str_replace('_', '', $scalar);
}
switch (true) {
case ctype_digit($scalar):
case '-' === $scalar[0] && ctype_digit(substr($scalar, 1)):
$cast = (int) $scalar;
return ($scalar === (string) $cast) ? $cast : $scalar;
case is_numeric($scalar):
case Parser::preg_match(self::getHexRegex(), $scalar):
$scalar = str_replace('_', '', $scalar);
return '0x' === $scalar[0].$scalar[1] ? hexdec($scalar) : (float) $scalar;
case '.inf' === $scalarLower:
case '.nan' === $scalarLower:
return -log(0);
case '-.inf' === $scalarLower:
return log(0);
case Parser::preg_match('/^(-|\+)?[0-9][0-9_]*(\.[0-9_]+)?$/', $scalar):
return (float) str_replace('_', '', $scalar);
case Parser::preg_match(self::getTimestampRegex(), $scalar):
// When no timezone is provided in the parsed date, YAML spec says we must assume UTC.
$time = new \DateTimeImmutable($scalar, new \DateTimeZone('UTC'));
if (Yaml::PARSE_DATETIME & $flags) {
return $time;
}
try {
if (false !== $scalar = $time->getTimestamp()) {
return $scalar;
}
} catch (\ValueError) {
// no-op
}
return $time->format('U');
}
}
return (string) $scalar;
}
private static function parseTag(string $value, int &$i, int $flags): ?string
{
if ('!' !== $value[$i]) {
return null;
}
$tagLength = strcspn($value, " \t\n[]{},", $i + 1);
$tag = substr($value, $i + 1, $tagLength);
$nextOffset = $i + $tagLength + 1;
$nextOffset += strspn($value, ' ', $nextOffset);
if ('' === $tag && (!isset($value[$nextOffset]) || \in_array($value[$nextOffset], [']', '}', ','], true))) {
throw new ParseException('Using the unquoted scalar value "!" is not supported. You must quote it.', self::$parsedLineNumber + 1, $value, self::$parsedFilename);
}
// Is followed by a scalar and is a built-in tag
if ('' !== $tag && (!isset($value[$nextOffset]) || !\in_array($value[$nextOffset], ['[', '{'], true)) && ('!' === $tag[0] || \in_array($tag, ['str', 'php/const', 'php/enum', 'php/object'], true))) {
// Manage in {@link self::evaluateScalar()}
return null;
}
$i = $nextOffset;
// Built-in tags
if ('' !== $tag && '!' === $tag[0]) {
throw new ParseException(sprintf('The built-in tag "!%s" is not implemented.', $tag), self::$parsedLineNumber + 1, $value, self::$parsedFilename);
}
if ('' !== $tag && !isset($value[$i])) {
throw new ParseException(sprintf('Missing value for tag "%s".', $tag), self::$parsedLineNumber + 1, $value, self::$parsedFilename);
}
if ('' === $tag || Yaml::PARSE_CUSTOM_TAGS & $flags) {
return $tag;
}
throw new ParseException(sprintf('Tags support is not enabled. Enable the "Yaml::PARSE_CUSTOM_TAGS" flag to use "!%s".', $tag), self::$parsedLineNumber + 1, $value, self::$parsedFilename);
}
public static function evaluateBinaryScalar(string $scalar): string
{
$parsedBinaryData = self::parseScalar(preg_replace('/\s/', '', $scalar));
if (0 !== (\strlen($parsedBinaryData) % 4)) {
throw new ParseException(sprintf('The normalized base64 encoded data (data without whitespace characters) length must be a multiple of four (%d bytes given).', \strlen($parsedBinaryData)), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
}
if (!Parser::preg_match('#^[A-Z0-9+/]+={0,2}$#i', $parsedBinaryData)) {
throw new ParseException(sprintf('The base64 encoded data (%s) contains invalid characters.', $parsedBinaryData), self::$parsedLineNumber + 1, $scalar, self::$parsedFilename);
}
return base64_decode($parsedBinaryData, true);
}
private static function isBinaryString(string $value): bool
{
return !preg_match('//u', $value) || preg_match('/[^\x00\x07-\x0d\x1B\x20-\xff]/', $value);
}
/**
* Gets a regex that matches a YAML date.
*
* @see http://www.yaml.org/spec/1.2/spec.html#id2761573
*/
private static function getTimestampRegex(): string
{
return <<<EOF
~^
(?P<year>[0-9][0-9][0-9][0-9])
-(?P<month>[0-9][0-9]?)
-(?P<day>[0-9][0-9]?)
(?:(?:[Tt]|[ \t]+)
(?P<hour>[0-9][0-9]?)
:(?P<minute>[0-9][0-9])
:(?P<second>[0-9][0-9])
(?:\.(?P<fraction>[0-9]*))?
(?:[ \t]*(?P<tz>Z|(?P<tz_sign>[-+])(?P<tz_hour>[0-9][0-9]?)
(?::(?P<tz_minute>[0-9][0-9]))?))?)?
$~x
EOF;
}
/**
* Gets a regex that matches a YAML number in hexadecimal notation.
*/
private static function getHexRegex(): string
{
return '~^0x[0-9a-f_]++$~i';
}
}