--- /dev/null
+<?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 Drush\Internal\Config\Yaml;
+
+use Drush\Internal\Config\Yaml\Exception\ParseException;
+use Drush\Internal\Config\Yaml\Tag\TaggedValue;
+
+/**
+ * Parser parses YAML strings to convert them to PHP arrays.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Parser
+{
+ const TAG_PATTERN = '(?P<tag>![\w!.\/:-]+)';
+ const BLOCK_SCALAR_HEADER_PATTERN = '(?P<separator>\||>)(?P<modifiers>\+|\-|\d+|\+\d+|\-\d+|\d+\+|\d+\-)?(?P<comments> +#.*)?';
+
+ private $offset = 0;
+ private $totalNumberOfLines;
+ private $lines = array();
+ private $currentLineNb = -1;
+ private $currentLine = '';
+ private $refs = array();
+ private $skippedLineNumbers = array();
+ private $locallySkippedLineNumbers = array();
+
+ public function __construct()
+ {
+ if (func_num_args() > 0) {
+ @trigger_error(sprintf('The constructor arguments $offset, $totalNumberOfLines, $skippedLineNumbers of %s are deprecated and will be removed in 4.0', self::class), E_USER_DEPRECATED);
+
+ $this->offset = func_get_arg(0);
+ if (func_num_args() > 1) {
+ $this->totalNumberOfLines = func_get_arg(1);
+ }
+ if (func_num_args() > 2) {
+ $this->skippedLineNumbers = func_get_arg(2);
+ }
+ }
+ }
+
+ /**
+ * Parses a YAML string to a PHP value.
+ *
+ * @param string $value A YAML string
+ * @param int $flags A bit field of PARSE_* constants to customize the YAML parser behavior
+ *
+ * @return mixed A PHP value
+ *
+ * @throws ParseException If the YAML is not valid
+ */
+ public function parse($value, $flags = 0)
+ {
+ if (is_bool($flags)) {
+ @trigger_error('Passing a boolean flag to toggle exception handling is deprecated since version 3.1 and will be removed in 4.0. Use the Yaml::PARSE_EXCEPTION_ON_INVALID_TYPE flag instead.', E_USER_DEPRECATED);
+
+ if ($flags) {
+ $flags = Yaml::PARSE_EXCEPTION_ON_INVALID_TYPE;
+ } else {
+ $flags = 0;
+ }
+ }
+
+ if (func_num_args() >= 3) {
+ @trigger_error('Passing a boolean flag to toggle object support is deprecated since version 3.1 and will be removed in 4.0. Use the Yaml::PARSE_OBJECT flag instead.', E_USER_DEPRECATED);
+
+ if (func_get_arg(2)) {
+ $flags |= Yaml::PARSE_OBJECT;
+ }
+ }
+
+ if (func_num_args() >= 4) {
+ @trigger_error('Passing a boolean flag to toggle object for map support is deprecated since version 3.1 and will be removed in 4.0. Use the Yaml::PARSE_OBJECT_FOR_MAP flag instead.', E_USER_DEPRECATED);
+
+ if (func_get_arg(3)) {
+ $flags |= Yaml::PARSE_OBJECT_FOR_MAP;
+ }
+ }
+
+ if (false === preg_match('//u', $value)) {
+ throw new ParseException('The YAML value does not appear to be valid UTF-8.');
+ }
+
+ $this->refs = array();
+
+ $mbEncoding = null;
+ $e = null;
+ $data = null;
+
+ if (2 /* MB_OVERLOAD_STRING */ & (int) ini_get('mbstring.func_overload')) {
+ $mbEncoding = mb_internal_encoding();
+ mb_internal_encoding('UTF-8');
+ }
+
+ try {
+ $data = $this->doParse($value, $flags);
+ } catch (\Exception $e) {
+ } catch (\Throwable $e) {
+ }
+
+ if (null !== $mbEncoding) {
+ mb_internal_encoding($mbEncoding);
+ }
+
+ $this->lines = array();
+ $this->currentLine = '';
+ $this->refs = array();
+ $this->skippedLineNumbers = array();
+ $this->locallySkippedLineNumbers = array();
+
+ if (null !== $e) {
+ throw $e;
+ }
+
+ return $data;
+ }
+
+ private function doParse($value, $flags)
+ {
+ $this->currentLineNb = -1;
+ $this->currentLine = '';
+ $value = $this->cleanup($value);
+ $this->lines = explode("\n", $value);
+ $this->locallySkippedLineNumbers = array();
+
+ if (null === $this->totalNumberOfLines) {
+ $this->totalNumberOfLines = count($this->lines);
+ }
+
+ if (!$this->moveToNextLine()) {
+ return null;
+ }
+
+ $data = array();
+ $context = null;
+ $allowOverwrite = false;
+
+ while ($this->isCurrentLineEmpty()) {
+ if (!$this->moveToNextLine()) {
+ return null;
+ }
+ }
+
+ // Resolves the tag and returns if end of the document
+ if (null !== ($tag = $this->getLineTag($this->currentLine, $flags, false)) && !$this->moveToNextLine()) {
+ return new TaggedValue($tag, '');
+ }
+
+ do {
+ if ($this->isCurrentLineEmpty()) {
+ continue;
+ }
+
+ // tab?
+ if ("\t" === $this->currentLine[0]) {
+ throw new ParseException('A YAML file cannot contain tabs as indentation.', $this->getRealCurrentLineNb() + 1, $this->currentLine);
+ }
+
+ $isRef = $mergeNode = false;
+ if (self::preg_match('#^\-((?P<leadspaces>\s+)(?P<value>.+))?$#u', rtrim($this->currentLine), $values)) {
+ if ($context && 'mapping' == $context) {
+ throw new ParseException('You cannot define a sequence item when in a mapping', $this->getRealCurrentLineNb() + 1, $this->currentLine);
+ }
+ $context = 'sequence';
+
+ if (isset($values['value']) && self::preg_match('#^&(?P<ref>[^ ]+) *(?P<value>.*)#u', $values['value'], $matches)) {
+ $isRef = $matches['ref'];
+ $values['value'] = $matches['value'];
+ }
+
+ if (isset($values['value'][1]) && '?' === $values['value'][0] && ' ' === $values['value'][1]) {
+ @trigger_error(sprintf('Starting an unquoted string with a question mark followed by a space is deprecated since version 3.3 and will throw \Symfony\Component\Yaml\Exception\ParseException in 4.0 on line %d.', $this->getRealCurrentLineNb() + 1), E_USER_DEPRECATED);
+ }
+
+ // array
+ if (!isset($values['value']) || '' == trim($values['value'], ' ') || 0 === strpos(ltrim($values['value'], ' '), '#')) {
+ $data[] = $this->parseBlock($this->getRealCurrentLineNb() + 1, $this->getNextEmbedBlock(null, true), $flags);
+ } elseif (null !== $subTag = $this->getLineTag(ltrim($values['value'], ' '), $flags)) {
+ $data[] = new TaggedValue(
+ $subTag,
+ $this->parseBlock($this->getRealCurrentLineNb() + 1, $this->getNextEmbedBlock(null, true), $flags)
+ );
+ } else {
+ if (isset($values['leadspaces'])
+ && self::preg_match('#^(?P<key>'.Inline::REGEX_QUOTED_STRING.'|[^ \'"\{\[].*?) *\:(\s+(?P<value>.+?))?\s*$#u', $this->trimTag($values['value']), $matches)
+ ) {
+ // this is a compact notation element, add to next block and parse
+ $block = $values['value'];
+ if ($this->isNextLineIndented()) {
+ $block .= "\n".$this->getNextEmbedBlock($this->getCurrentLineIndentation() + strlen($values['leadspaces']) + 1);
+ }
+
+ $data[] = $this->parseBlock($this->getRealCurrentLineNb(), $block, $flags);
+ } else {
+ $data[] = $this->parseValue($values['value'], $flags, $context);
+ }
+ }
+ if ($isRef) {
+ $this->refs[$isRef] = end($data);
+ }
+ } elseif (
+ self::preg_match('#^(?P<key>'.Inline::REGEX_QUOTED_STRING.'|(?:!?!php/const:)?(?:![^\s]++\s++)?[^ \'"\[\{!].*?) *\:(\s++(?P<value>.+))?$#u', rtrim($this->currentLine), $values)
+ && (false === strpos($values['key'], ' #') || in_array($values['key'][0], array('"', "'")))
+ ) {
+ if ($context && 'sequence' == $context) {
+ throw new ParseException('You cannot define a mapping item when in a sequence', $this->currentLineNb + 1, $this->currentLine);
+ }
+ $context = 'mapping';
+
+ // force correct settings
+ Inline::parse(null, $flags, $this->refs);
+ try {
+ Inline::$parsedLineNumber = $this->getRealCurrentLineNb();
+ $i = 0;
+ $evaluateKey = !(Yaml::PARSE_KEYS_AS_STRINGS & $flags);
+
+ // constants in key will be evaluated anyway
+ if (isset($values['key'][0]) && '!' === $values['key'][0] && Yaml::PARSE_CONSTANT & $flags) {
+ $evaluateKey = true;
+ }
+
+ $key = Inline::parseScalar($values['key'], 0, null, $i, $evaluateKey);
+ } catch (ParseException $e) {
+ $e->setParsedLine($this->getRealCurrentLineNb() + 1);
+ $e->setSnippet($this->currentLine);
+
+ throw $e;
+ }
+
+ if (!(Yaml::PARSE_KEYS_AS_STRINGS & $flags) && !is_string($key) && !is_int($key)) {
+ $keyType = is_numeric($key) ? 'numeric key' : 'non-string key';
+ @trigger_error(sprintf('Implicit casting of %s to string is deprecated since version 3.3 and will throw \Symfony\Component\Yaml\Exception\ParseException in 4.0. Quote your evaluable mapping keys instead on line %d.', $keyType, $this->getRealCurrentLineNb() + 1), E_USER_DEPRECATED);
+ }
+
+ // Convert float keys to strings, to avoid being converted to integers by PHP
+ if (is_float($key)) {
+ $key = (string) $key;
+ }
+
+ if ('<<' === $key && (!isset($values['value']) || !self::preg_match('#^&(?P<ref>[^ ]+)#u', $values['value'], $refMatches))) {
+ $mergeNode = true;
+ $allowOverwrite = true;
+ if (isset($values['value'][0]) && '*' === $values['value'][0]) {
+ $refName = substr(rtrim($values['value']), 1);
+ if (!array_key_exists($refName, $this->refs)) {
+ throw new ParseException(sprintf('Reference "%s" does not exist.', $refName), $this->getRealCurrentLineNb() + 1, $this->currentLine);
+ }
+
+ $refValue = $this->refs[$refName];
+
+ if (Yaml::PARSE_OBJECT_FOR_MAP & $flags && $refValue instanceof \stdClass) {
+ $refValue = (array) $refValue;
+ }
+
+ if (!is_array($refValue)) {
+ throw new ParseException('YAML merge keys used with a scalar value instead of an array.', $this->getRealCurrentLineNb() + 1, $this->currentLine);
+ }
+
+ $data += $refValue; // array union
+ } else {
+ if (isset($values['value']) && '' !== $values['value']) {
+ $value = $values['value'];
+ } else {
+ $value = $this->getNextEmbedBlock();
+ }
+ $parsed = $this->parseBlock($this->getRealCurrentLineNb() + 1, $value, $flags);
+
+ if (Yaml::PARSE_OBJECT_FOR_MAP & $flags && $parsed instanceof \stdClass) {
+ $parsed = (array) $parsed;
+ }
+
+ if (!is_array($parsed)) {
+ throw new ParseException('YAML merge keys used with a scalar value instead of an array.', $this->getRealCurrentLineNb() + 1, $this->currentLine);
+ }
+
+ if (isset($parsed[0])) {
+ // If the value associated with the merge key is a sequence, then this sequence is expected to contain mapping nodes
+ // and each of these nodes is merged in turn according to its order in the sequence. Keys in mapping nodes earlier
+ // in the sequence override keys specified in later mapping nodes.
+ foreach ($parsed as $parsedItem) {
+ if (Yaml::PARSE_OBJECT_FOR_MAP & $flags && $parsedItem instanceof \stdClass) {
+ $parsedItem = (array) $parsedItem;
+ }
+
+ if (!is_array($parsedItem)) {
+ throw new ParseException('Merge items must be arrays.', $this->getRealCurrentLineNb() + 1, $parsedItem);
+ }
+
+ $data += $parsedItem; // array union
+ }
+ } else {
+ // If the value associated with the key is a single mapping node, each of its key/value pairs is inserted into the
+ // current mapping, unless the key already exists in it.
+ $data += $parsed; // array union
+ }
+ }
+ } elseif ('<<' !== $key && isset($values['value']) && self::preg_match('#^&(?P<ref>[^ ]++) *+(?P<value>.*)#u', $values['value'], $matches)) {
+ $isRef = $matches['ref'];
+ $values['value'] = $matches['value'];
+ }
+
+ $subTag = null;
+ if ($mergeNode) {
+ // Merge keys
+ } elseif (!isset($values['value']) || '' === $values['value'] || 0 === strpos($values['value'], '#') || (null !== $subTag = $this->getLineTag($values['value'], $flags)) || '<<' === $key) {
+ // hash
+ // if next line is less indented or equal, then it means that the current value is null
+ if (!$this->isNextLineIndented() && !$this->isNextLineUnIndentedCollection()) {
+ // Spec: Keys MUST be unique; first one wins.
+ // But overwriting is allowed when a merge node is used in current block.
+ if ($allowOverwrite || !isset($data[$key])) {
+ if (null !== $subTag) {
+ $data[$key] = new TaggedValue($subTag, '');
+ } else {
+ $data[$key] = null;
+ }
+ } else {
+ @trigger_error(sprintf('Duplicate key "%s" detected whilst parsing YAML. Silent handling of duplicate mapping keys in YAML is deprecated since version 3.2 and will throw \Symfony\Component\Yaml\Exception\ParseException in 4.0 on line %d.', $key, $this->getRealCurrentLineNb() + 1), E_USER_DEPRECATED);
+ }
+ } else {
+ // remember the parsed line number here in case we need it to provide some contexts in error messages below
+ $realCurrentLineNbKey = $this->getRealCurrentLineNb();
+ $value = $this->parseBlock($this->getRealCurrentLineNb() + 1, $this->getNextEmbedBlock(), $flags);
+ if ('<<' === $key) {
+ $this->refs[$refMatches['ref']] = $value;
+
+ if (Yaml::PARSE_OBJECT_FOR_MAP & $flags && $value instanceof \stdClass) {
+ $value = (array) $value;
+ }
+
+ $data += $value;
+ } elseif ($allowOverwrite || !isset($data[$key])) {
+ // Spec: Keys MUST be unique; first one wins.
+ // But overwriting is allowed when a merge node is used in current block.
+ if (null !== $subTag) {
+ $data[$key] = new TaggedValue($subTag, $value);
+ } else {
+ $data[$key] = $value;
+ }
+ } else {
+ @trigger_error(sprintf('Duplicate key "%s" detected whilst parsing YAML. Silent handling of duplicate mapping keys in YAML is deprecated since version 3.2 and will throw \Symfony\Component\Yaml\Exception\ParseException in 4.0 on line %d.', $key, $realCurrentLineNbKey + 1), E_USER_DEPRECATED);
+ }
+ }
+ } else {
+ $value = $this->parseValue(rtrim($values['value']), $flags, $context);
+ // Spec: Keys MUST be unique; first one wins.
+ // But overwriting is allowed when a merge node is used in current block.
+ if ($allowOverwrite || !isset($data[$key])) {
+ $data[$key] = $value;
+ } else {
+ @trigger_error(sprintf('Duplicate key "%s" detected whilst parsing YAML. Silent handling of duplicate mapping keys in YAML is deprecated since version 3.2 and will throw \Symfony\Component\Yaml\Exception\ParseException in 4.0 on line %d.', $key, $this->getRealCurrentLineNb() + 1), E_USER_DEPRECATED);
+ }
+ }
+ if ($isRef) {
+ $this->refs[$isRef] = $data[$key];
+ }
+ } else {
+ // multiple documents are not supported
+ if ('---' === $this->currentLine) {
+ throw new ParseException('Multiple documents are not supported.', $this->currentLineNb + 1, $this->currentLine);
+ }
+
+ if (isset($this->currentLine[1]) && '?' === $this->currentLine[0] && ' ' === $this->currentLine[1]) {
+ @trigger_error(sprintf('Starting an unquoted string with a question mark followed by a space is deprecated since version 3.3 and will throw \Symfony\Component\Yaml\Exception\ParseException in 4.0 on line %d.', $this->getRealCurrentLineNb() + 1), E_USER_DEPRECATED);
+ }
+
+ // 1-liner optionally followed by newline(s)
+ if (is_string($value) && $this->lines[0] === trim($value)) {
+ try {
+ Inline::$parsedLineNumber = $this->getRealCurrentLineNb();
+ $value = Inline::parse($this->lines[0], $flags, $this->refs);
+ } catch (ParseException $e) {
+ $e->setParsedLine($this->getRealCurrentLineNb() + 1);
+ $e->setSnippet($this->currentLine);
+
+ throw $e;
+ }
+
+ return $value;
+ }
+
+ // try to parse the value as a multi-line string as a last resort
+ if (0 === $this->currentLineNb) {
+ $parseError = false;
+ $previousLineWasNewline = false;
+ $previousLineWasTerminatedWithBackslash = false;
+ $value = '';
+
+ foreach ($this->lines as $line) {
+ try {
+ if (isset($line[0]) && ('"' === $line[0] || "'" === $line[0])) {
+ $parsedLine = $line;
+ } else {
+ $parsedLine = Inline::parse($line, $flags, $this->refs);
+ }
+
+ if (!is_string($parsedLine)) {
+ $parseError = true;
+ break;
+ }
+
+ if ('' === trim($parsedLine)) {
+ $value .= "\n";
+ } elseif (!$previousLineWasNewline && !$previousLineWasTerminatedWithBackslash) {
+ $value .= ' ';
+ }
+
+ if ('' !== trim($parsedLine) && '\\' === substr($parsedLine, -1)) {
+ $value .= ltrim(substr($parsedLine, 0, -1));
+ } elseif ('' !== trim($parsedLine)) {
+ $value .= trim($parsedLine);
+ }
+
+ if ('' === trim($parsedLine)) {
+ $previousLineWasNewline = true;
+ $previousLineWasTerminatedWithBackslash = false;
+ } elseif ('\\' === substr($parsedLine, -1)) {
+ $previousLineWasNewline = false;
+ $previousLineWasTerminatedWithBackslash = true;
+ } else {
+ $previousLineWasNewline = false;
+ $previousLineWasTerminatedWithBackslash = false;
+ }
+ } catch (ParseException $e) {
+ $parseError = true;
+ break;
+ }
+ }
+
+ if (!$parseError) {
+ return Inline::parse(trim($value));
+ }
+ }
+
+ throw new ParseException('Unable to parse.', $this->getRealCurrentLineNb() + 1, $this->currentLine);
+ }
+ } while ($this->moveToNextLine());
+
+ if (null !== $tag) {
+ $data = new TaggedValue($tag, $data);
+ }
+
+ if (Yaml::PARSE_OBJECT_FOR_MAP & $flags && !is_object($data) && 'mapping' === $context) {
+ $object = new \stdClass();
+
+ foreach ($data as $key => $value) {
+ $object->$key = $value;
+ }
+
+ $data = $object;
+ }
+
+ return empty($data) ? null : $data;
+ }
+
+ private function parseBlock($offset, $yaml, $flags)
+ {
+ $skippedLineNumbers = $this->skippedLineNumbers;
+
+ foreach ($this->locallySkippedLineNumbers as $lineNumber) {
+ if ($lineNumber < $offset) {
+ continue;
+ }
+
+ $skippedLineNumbers[] = $lineNumber;
+ }
+
+ $parser = new self();
+ $parser->offset = $offset;
+ $parser->totalNumberOfLines = $this->totalNumberOfLines;
+ $parser->skippedLineNumbers = $skippedLineNumbers;
+ $parser->refs = &$this->refs;
+
+ return $parser->doParse($yaml, $flags);
+ }
+
+ /**
+ * Returns the current line number (takes the offset into account).
+ *
+ * @return int The current line number
+ */
+ private function getRealCurrentLineNb()
+ {
+ $realCurrentLineNumber = $this->currentLineNb + $this->offset;
+
+ foreach ($this->skippedLineNumbers as $skippedLineNumber) {
+ if ($skippedLineNumber > $realCurrentLineNumber) {
+ break;
+ }
+
+ ++$realCurrentLineNumber;
+ }
+
+ return $realCurrentLineNumber;
+ }
+
+ /**
+ * Returns the current line indentation.
+ *
+ * @return int The current line indentation
+ */
+ private function getCurrentLineIndentation()
+ {
+ return strlen($this->currentLine) - strlen(ltrim($this->currentLine, ' '));
+ }
+
+ /**
+ * Returns the next embed block of YAML.
+ *
+ * @param int $indentation The indent level at which the block is to be read, or null for default
+ * @param bool $inSequence True if the enclosing data structure is a sequence
+ *
+ * @return string A YAML string
+ *
+ * @throws ParseException When indentation problem are detected
+ */
+ private function getNextEmbedBlock($indentation = null, $inSequence = false)
+ {
+ $oldLineIndentation = $this->getCurrentLineIndentation();
+ $blockScalarIndentations = array();
+
+ if ($this->isBlockScalarHeader()) {
+ $blockScalarIndentations[] = $oldLineIndentation;
+ }
+
+ if (!$this->moveToNextLine()) {
+ return;
+ }
+
+ if (null === $indentation) {
+ $newIndent = $this->getCurrentLineIndentation();
+
+ $unindentedEmbedBlock = $this->isStringUnIndentedCollectionItem();
+
+ if (!$this->isCurrentLineEmpty() && 0 === $newIndent && !$unindentedEmbedBlock) {
+ throw new ParseException('Indentation problem.', $this->getRealCurrentLineNb() + 1, $this->currentLine);
+ }
+ } else {
+ $newIndent = $indentation;
+ }
+
+ $data = array();
+ if ($this->getCurrentLineIndentation() >= $newIndent) {
+ $data[] = substr($this->currentLine, $newIndent);
+ } else {
+ $this->moveToPreviousLine();
+
+ return;
+ }
+
+ if ($inSequence && $oldLineIndentation === $newIndent && isset($data[0][0]) && '-' === $data[0][0]) {
+ // the previous line contained a dash but no item content, this line is a sequence item with the same indentation
+ // and therefore no nested list or mapping
+ $this->moveToPreviousLine();
+
+ return;
+ }
+
+ $isItUnindentedCollection = $this->isStringUnIndentedCollectionItem();
+
+ if (empty($blockScalarIndentations) && $this->isBlockScalarHeader()) {
+ $blockScalarIndentations[] = $this->getCurrentLineIndentation();
+ }
+
+ $previousLineIndentation = $this->getCurrentLineIndentation();
+
+ while ($this->moveToNextLine()) {
+ $indent = $this->getCurrentLineIndentation();
+
+ // terminate all block scalars that are more indented than the current line
+ if (!empty($blockScalarIndentations) && $indent < $previousLineIndentation && '' !== trim($this->currentLine)) {
+ foreach ($blockScalarIndentations as $key => $blockScalarIndentation) {
+ if ($blockScalarIndentation >= $indent) {
+ unset($blockScalarIndentations[$key]);
+ }
+ }
+ }
+
+ if (empty($blockScalarIndentations) && !$this->isCurrentLineComment() && $this->isBlockScalarHeader()) {
+ $blockScalarIndentations[] = $indent;
+ }
+
+ $previousLineIndentation = $indent;
+
+ if ($isItUnindentedCollection && !$this->isCurrentLineEmpty() && !$this->isStringUnIndentedCollectionItem() && $newIndent === $indent) {
+ $this->moveToPreviousLine();
+ break;
+ }
+
+ if ($this->isCurrentLineBlank()) {
+ $data[] = substr($this->currentLine, $newIndent);
+ continue;
+ }
+
+ if ($indent >= $newIndent) {
+ $data[] = substr($this->currentLine, $newIndent);
+ } elseif ($this->isCurrentLineComment()) {
+ $data[] = $this->currentLine;
+ } elseif (0 == $indent) {
+ $this->moveToPreviousLine();
+
+ break;
+ } else {
+ throw new ParseException('Indentation problem.', $this->getRealCurrentLineNb() + 1, $this->currentLine);
+ }
+ }
+
+ return implode("\n", $data);
+ }
+
+ /**
+ * Moves the parser to the next line.
+ *
+ * @return bool
+ */
+ private function moveToNextLine()
+ {
+ if ($this->currentLineNb >= count($this->lines) - 1) {
+ return false;
+ }
+
+ $this->currentLine = $this->lines[++$this->currentLineNb];
+
+ return true;
+ }
+
+ /**
+ * Moves the parser to the previous line.
+ *
+ * @return bool
+ */
+ private function moveToPreviousLine()
+ {
+ if ($this->currentLineNb < 1) {
+ return false;
+ }
+
+ $this->currentLine = $this->lines[--$this->currentLineNb];
+
+ return true;
+ }
+
+ /**
+ * Parses a YAML value.
+ *
+ * @param string $value A YAML value
+ * @param int $flags A bit field of PARSE_* constants to customize the YAML parser behavior
+ * @param string $context The parser context (either sequence or mapping)
+ *
+ * @return mixed A PHP value
+ *
+ * @throws ParseException When reference does not exist
+ */
+ private function parseValue($value, $flags, $context)
+ {
+ if (0 === strpos($value, '*')) {
+ if (false !== $pos = strpos($value, '#')) {
+ $value = substr($value, 1, $pos - 2);
+ } else {
+ $value = substr($value, 1);
+ }
+
+ if (!array_key_exists($value, $this->refs)) {
+ throw new ParseException(sprintf('Reference "%s" does not exist.', $value), $this->currentLineNb + 1, $this->currentLine);
+ }
+
+ return $this->refs[$value];
+ }
+
+ if (self::preg_match('/^(?:'.self::TAG_PATTERN.' +)?'.self::BLOCK_SCALAR_HEADER_PATTERN.'$/', $value, $matches)) {
+ $modifiers = isset($matches['modifiers']) ? $matches['modifiers'] : '';
+
+ $data = $this->parseBlockScalar($matches['separator'], preg_replace('#\d+#', '', $modifiers), (int) abs($modifiers));
+
+ if ('' !== $matches['tag']) {
+ if ('!!binary' === $matches['tag']) {
+ return Inline::evaluateBinaryScalar($data);
+ } elseif ('!' !== $matches['tag']) {
+ @trigger_error(sprintf('Using the custom tag "%s" for the value "%s" is deprecated since version 3.3. It will be replaced by an instance of %s in 4.0 on line %d.', $matches['tag'], $data, TaggedValue::class, $this->getRealCurrentLineNb() + 1), E_USER_DEPRECATED);
+ }
+ }
+
+ return $data;
+ }
+
+ try {
+ $quotation = '' !== $value && ('"' === $value[0] || "'" === $value[0]) ? $value[0] : null;
+
+ // do not take following lines into account when the current line is a quoted single line value
+ if (null !== $quotation && self::preg_match('/^'.$quotation.'.*'.$quotation.'(\s*#.*)?$/', $value)) {
+ return Inline::parse($value, $flags, $this->refs);
+ }
+
+ $lines = array();
+
+ while ($this->moveToNextLine()) {
+ // unquoted strings end before the first unindented line
+ if (null === $quotation && 0 === $this->getCurrentLineIndentation()) {
+ $this->moveToPreviousLine();
+
+ break;
+ }
+
+ $lines[] = trim($this->currentLine);
+
+ // quoted string values end with a line that is terminated with the quotation character
+ if ('' !== $this->currentLine && substr($this->currentLine, -1) === $quotation) {
+ break;
+ }
+ }
+
+ for ($i = 0, $linesCount = count($lines), $previousLineBlank = false; $i < $linesCount; ++$i) {
+ if ('' === $lines[$i]) {
+ $value .= "\n";
+ $previousLineBlank = true;
+ } elseif ($previousLineBlank) {
+ $value .= $lines[$i];
+ $previousLineBlank = false;
+ } else {
+ $value .= ' '.$lines[$i];
+ $previousLineBlank = false;
+ }
+ }
+
+ Inline::$parsedLineNumber = $this->getRealCurrentLineNb();
+ $parsedValue = Inline::parse($value, $flags, $this->refs);
+
+ if ('mapping' === $context && is_string($parsedValue) && '"' !== $value[0] && "'" !== $value[0] && '[' !== $value[0] && '{' !== $value[0] && '!' !== $value[0] && false !== strpos($parsedValue, ': ')) {
+ throw new ParseException('A colon cannot be used in an unquoted mapping value.');
+ }
+
+ return $parsedValue;
+ } catch (ParseException $e) {
+ $e->setParsedLine($this->getRealCurrentLineNb() + 1);
+ $e->setSnippet($this->currentLine);
+
+ throw $e;
+ }
+ }
+
+ /**
+ * Parses a block scalar.
+ *
+ * @param string $style The style indicator that was used to begin this block scalar (| or >)
+ * @param string $chomping The chomping indicator that was used to begin this block scalar (+ or -)
+ * @param int $indentation The indentation indicator that was used to begin this block scalar
+ *
+ * @return string The text value
+ */
+ private function parseBlockScalar($style, $chomping = '', $indentation = 0)
+ {
+ $notEOF = $this->moveToNextLine();
+ if (!$notEOF) {
+ return '';
+ }
+
+ $isCurrentLineBlank = $this->isCurrentLineBlank();
+ $blockLines = array();
+
+ // leading blank lines are consumed before determining indentation
+ while ($notEOF && $isCurrentLineBlank) {
+ // newline only if not EOF
+ if ($notEOF = $this->moveToNextLine()) {
+ $blockLines[] = '';
+ $isCurrentLineBlank = $this->isCurrentLineBlank();
+ }
+ }
+
+ // determine indentation if not specified
+ if (0 === $indentation) {
+ if (self::preg_match('/^ +/', $this->currentLine, $matches)) {
+ $indentation = strlen($matches[0]);
+ }
+ }
+
+ if ($indentation > 0) {
+ $pattern = sprintf('/^ {%d}(.*)$/', $indentation);
+
+ while (
+ $notEOF && (
+ $isCurrentLineBlank ||
+ self::preg_match($pattern, $this->currentLine, $matches)
+ )
+ ) {
+ if ($isCurrentLineBlank && strlen($this->currentLine) > $indentation) {
+ $blockLines[] = substr($this->currentLine, $indentation);
+ } elseif ($isCurrentLineBlank) {
+ $blockLines[] = '';
+ } else {
+ $blockLines[] = $matches[1];
+ }
+
+ // newline only if not EOF
+ if ($notEOF = $this->moveToNextLine()) {
+ $isCurrentLineBlank = $this->isCurrentLineBlank();
+ }
+ }
+ } elseif ($notEOF) {
+ $blockLines[] = '';
+ }
+
+ if ($notEOF) {
+ $blockLines[] = '';
+ $this->moveToPreviousLine();
+ } elseif (!$notEOF && !$this->isCurrentLineLastLineInDocument()) {
+ $blockLines[] = '';
+ }
+
+ // folded style
+ if ('>' === $style) {
+ $text = '';
+ $previousLineIndented = false;
+ $previousLineBlank = false;
+
+ for ($i = 0, $blockLinesCount = count($blockLines); $i < $blockLinesCount; ++$i) {
+ if ('' === $blockLines[$i]) {
+ $text .= "\n";
+ $previousLineIndented = false;
+ $previousLineBlank = true;
+ } elseif (' ' === $blockLines[$i][0]) {
+ $text .= "\n".$blockLines[$i];
+ $previousLineIndented = true;
+ $previousLineBlank = false;
+ } elseif ($previousLineIndented) {
+ $text .= "\n".$blockLines[$i];
+ $previousLineIndented = false;
+ $previousLineBlank = false;
+ } elseif ($previousLineBlank || 0 === $i) {
+ $text .= $blockLines[$i];
+ $previousLineIndented = false;
+ $previousLineBlank = false;
+ } else {
+ $text .= ' '.$blockLines[$i];
+ $previousLineIndented = false;
+ $previousLineBlank = false;
+ }
+ }
+ } else {
+ $text = implode("\n", $blockLines);
+ }
+
+ // deal with trailing newlines
+ if ('' === $chomping) {
+ $text = preg_replace('/\n+$/', "\n", $text);
+ } elseif ('-' === $chomping) {
+ $text = preg_replace('/\n+$/', '', $text);
+ }
+
+ return $text;
+ }
+
+ /**
+ * Returns true if the next line is indented.
+ *
+ * @return bool Returns true if the next line is indented, false otherwise
+ */
+ private function isNextLineIndented()
+ {
+ $currentIndentation = $this->getCurrentLineIndentation();
+ $EOF = !$this->moveToNextLine();
+
+ while (!$EOF && $this->isCurrentLineEmpty()) {
+ $EOF = !$this->moveToNextLine();
+ }
+
+ if ($EOF) {
+ return false;
+ }
+
+ $ret = $this->getCurrentLineIndentation() > $currentIndentation;
+
+ $this->moveToPreviousLine();
+
+ return $ret;
+ }
+
+ /**
+ * Returns true if the current line is blank or if it is a comment line.
+ *
+ * @return bool Returns true if the current line is empty or if it is a comment line, false otherwise
+ */
+ private function isCurrentLineEmpty()
+ {
+ return $this->isCurrentLineBlank() || $this->isCurrentLineComment();
+ }
+
+ /**
+ * Returns true if the current line is blank.
+ *
+ * @return bool Returns true if the current line is blank, false otherwise
+ */
+ private function isCurrentLineBlank()
+ {
+ return '' == trim($this->currentLine, ' ');
+ }
+
+ /**
+ * Returns true if the current line is a comment line.
+ *
+ * @return bool Returns true if the current line is a comment line, false otherwise
+ */
+ private function isCurrentLineComment()
+ {
+ //checking explicitly the first char of the trim is faster than loops or strpos
+ $ltrimmedLine = ltrim($this->currentLine, ' ');
+
+ return '' !== $ltrimmedLine && '#' === $ltrimmedLine[0];
+ }
+
+ private function isCurrentLineLastLineInDocument()
+ {
+ return ($this->offset + $this->currentLineNb) >= ($this->totalNumberOfLines - 1);
+ }
+
+ /**
+ * Cleanups a YAML string to be parsed.
+ *
+ * @param string $value The input YAML string
+ *
+ * @return string A cleaned up YAML string
+ */
+ private function cleanup($value)
+ {
+ $value = str_replace(array("\r\n", "\r"), "\n", $value);
+
+ // strip YAML header
+ $count = 0;
+ $value = preg_replace('#^\%YAML[: ][\d\.]+.*\n#u', '', $value, -1, $count);
+ $this->offset += $count;
+
+ // remove leading comments
+ $trimmedValue = preg_replace('#^(\#.*?\n)+#s', '', $value, -1, $count);
+ if (1 === $count) {
+ // items have been removed, update the offset
+ $this->offset += substr_count($value, "\n") - substr_count($trimmedValue, "\n");
+ $value = $trimmedValue;
+ }
+
+ // remove start of the document marker (---)
+ $trimmedValue = preg_replace('#^\-\-\-.*?\n#s', '', $value, -1, $count);
+ if (1 === $count) {
+ // items have been removed, update the offset
+ $this->offset += substr_count($value, "\n") - substr_count($trimmedValue, "\n");
+ $value = $trimmedValue;
+
+ // remove end of the document marker (...)
+ $value = preg_replace('#\.\.\.\s*$#', '', $value);
+ }
+
+ return $value;
+ }
+
+ /**
+ * Returns true if the next line starts unindented collection.
+ *
+ * @return bool Returns true if the next line starts unindented collection, false otherwise
+ */
+ private function isNextLineUnIndentedCollection()
+ {
+ $currentIndentation = $this->getCurrentLineIndentation();
+ $notEOF = $this->moveToNextLine();
+
+ while ($notEOF && $this->isCurrentLineEmpty()) {
+ $notEOF = $this->moveToNextLine();
+ }
+
+ if (false === $notEOF) {
+ return false;
+ }
+
+ $ret = $this->getCurrentLineIndentation() === $currentIndentation && $this->isStringUnIndentedCollectionItem();
+
+ $this->moveToPreviousLine();
+
+ return $ret;
+ }
+
+ /**
+ * Returns true if the string is un-indented collection item.
+ *
+ * @return bool Returns true if the string is un-indented collection item, false otherwise
+ */
+ private function isStringUnIndentedCollectionItem()
+ {
+ return '-' === rtrim($this->currentLine) || 0 === strpos($this->currentLine, '- ');
+ }
+
+ /**
+ * Tests whether or not the current line is the header of a block scalar.
+ *
+ * @return bool
+ */
+ private function isBlockScalarHeader()
+ {
+ return (bool) self::preg_match('~'.self::BLOCK_SCALAR_HEADER_PATTERN.'$~', $this->currentLine);
+ }
+
+ /**
+ * A local wrapper for `preg_match` which will throw a ParseException if there
+ * is an internal error in the PCRE engine.
+ *
+ * This avoids us needing to check for "false" every time PCRE is used
+ * in the YAML engine
+ *
+ * @throws ParseException on a PCRE internal error
+ *
+ * @see preg_last_error()
+ *
+ * @internal
+ */
+ public static function preg_match($pattern, $subject, &$matches = null, $flags = 0, $offset = 0)
+ {
+ if (false === $ret = preg_match($pattern, $subject, $matches, $flags, $offset)) {
+ switch (preg_last_error()) {
+ case PREG_INTERNAL_ERROR:
+ $error = 'Internal PCRE error.';
+ break;
+ case PREG_BACKTRACK_LIMIT_ERROR:
+ $error = 'pcre.backtrack_limit reached.';
+ break;
+ case PREG_RECURSION_LIMIT_ERROR:
+ $error = 'pcre.recursion_limit reached.';
+ break;
+ case PREG_BAD_UTF8_ERROR:
+ $error = 'Malformed UTF-8 data.';
+ break;
+ case PREG_BAD_UTF8_OFFSET_ERROR:
+ $error = 'Offset doesn\'t correspond to the begin of a valid UTF-8 code point.';
+ break;
+ default:
+ $error = 'Error.';
+ }
+
+ throw new ParseException($error);
+ }
+
+ return $ret;
+ }
+
+ /**
+ * Trim the tag on top of the value.
+ *
+ * Prevent values such as `!foo {quz: bar}` to be considered as
+ * a mapping block.
+ */
+ private function trimTag($value)
+ {
+ if ('!' === $value[0]) {
+ return ltrim(substr($value, 1, strcspn($value, " \r\n", 1)), ' ');
+ }
+
+ return $value;
+ }
+
+ private function getLineTag($value, $flags, $nextLineCheck = true)
+ {
+ if ('' === $value || '!' !== $value[0] || 1 !== self::preg_match('/^'.self::TAG_PATTERN.' *( +#.*)?$/', $value, $matches)) {
+ return;
+ }
+
+ if ($nextLineCheck && !$this->isNextLineIndented()) {
+ return;
+ }
+
+ $tag = substr($matches['tag'], 1);
+
+ // Built-in tags
+ if ($tag && '!' === $tag[0]) {
+ throw new ParseException(sprintf('The built-in tag "!%s" is not implemented.', $tag));
+ }
+
+ if (Yaml::PARSE_CUSTOM_TAGS & $flags) {
+ return $tag;
+ }
+
+ throw new ParseException(sprintf('Tags support is not enabled. You must use the flag `Yaml::PARSE_CUSTOM_TAGS` to use "%s".', $matches['tag']));
+ }
+}
projects / yaffs-website / blobdiff