--- /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 Symfony\Component\Yaml;
+
+use Symfony\Component\Yaml\Exception\ParseException;
+
+/**
+ * Parser parses YAML strings to convert them to PHP arrays.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Parser
+{
+ const BLOCK_SCALAR_HEADER_PATTERN = '(?P<separator>\||>)(?P<modifiers>\+|\-|\d+|\+\d+|\-\d+|\d+\+|\d+\-)?(?P<comments> +#.*)?';
+ // BC - wrongly named
+ const FOLDED_SCALAR_PATTERN = self::BLOCK_SCALAR_HEADER_PATTERN;
+
+ private $offset = 0;
+ private $totalNumberOfLines;
+ private $lines = array();
+ private $currentLineNb = -1;
+ private $currentLine = '';
+ private $refs = array();
+ private $skippedLineNumbers = array();
+ private $locallySkippedLineNumbers = array();
+
+ /**
+ * Constructor.
+ *
+ * @param int $offset The offset of YAML document (used for line numbers in error messages)
+ * @param int|null $totalNumberOfLines The overall number of lines being parsed
+ * @param int[] $skippedLineNumbers Number of comment lines that have been skipped by the parser
+ */
+ public function __construct($offset = 0, $totalNumberOfLines = null, array $skippedLineNumbers = array())
+ {
+ $this->offset = $offset;
+ $this->totalNumberOfLines = $totalNumberOfLines;
+ $this->skippedLineNumbers = $skippedLineNumbers;
+ }
+
+ /**
+ * Parses a YAML string to a PHP value.
+ *
+ * @param string $value A YAML string
+ * @param bool $exceptionOnInvalidType true if an exception must be thrown on invalid types (a PHP resource or object), false otherwise
+ * @param bool $objectSupport true if object support is enabled, false otherwise
+ * @param bool $objectForMap true if maps should return a stdClass instead of array()
+ *
+ * @return mixed A PHP value
+ *
+ * @throws ParseException If the YAML is not valid
+ */
+ public function parse($value, $exceptionOnInvalidType = false, $objectSupport = false, $objectForMap = false)
+ {
+ if (false === preg_match('//u', $value)) {
+ throw new ParseException('The YAML value does not appear to be valid UTF-8.');
+ }
+ $this->currentLineNb = -1;
+ $this->currentLine = '';
+ $value = $this->cleanup($value);
+ $this->lines = explode("\n", $value);
+
+ if (null === $this->totalNumberOfLines) {
+ $this->totalNumberOfLines = count($this->lines);
+ }
+
+ if (2 /* MB_OVERLOAD_STRING */ & (int) ini_get('mbstring.func_overload')) {
+ $mbEncoding = mb_internal_encoding();
+ mb_internal_encoding('UTF-8');
+ }
+
+ $data = array();
+ $context = null;
+ $allowOverwrite = false;
+ while ($this->moveToNextLine()) {
+ 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'] = $matches['value'];
+ }
+
+ // array
+ if (!isset($values['value']) || '' == trim($values['value'], ' ') || 0 === strpos(ltrim($values['value'], ' '), '#')) {
+ $data[] = $this->parseBlock($this->getRealCurrentLineNb() + 1, $this->getNextEmbedBlock(null, true), $exceptionOnInvalidType, $objectSupport, $objectForMap);
+ } else {
+ if (isset($values['leadspaces'])
+ && self::preg_match('#^(?P<key>'.Inline::REGEX_QUOTED_STRING.'|[^ \'"\{\[].*?) *\:(\s+(?P<value>.+))?$#u', rtrim($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, $exceptionOnInvalidType, $objectSupport, $objectForMap);
+ } else {
+ $data[] = $this->parseValue($values['value'], $exceptionOnInvalidType, $objectSupport, $objectForMap, $context);
+ }
+ }
+ if ($isRef) {
+ $this->refs[$isRef] = end($data);
+ }
+ } elseif (
+ self::preg_match('#^(?P<key>'.Inline::REGEX_QUOTED_STRING.'|[^ \'"\[\{].*?) *\:(\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, $exceptionOnInvalidType, $objectSupport, $objectForMap, $this->refs);
+ try {
+ $key = Inline::parseScalar($values['key']);
+ } catch (ParseException $e) {
+ $e->setParsedLine($this->getRealCurrentLineNb() + 1);
+ $e->setSnippet($this->currentLine);
+
+ throw $e;
+ }
+
+ // Convert float keys to strings, to avoid being converted to integers by PHP
+ if (is_float($key)) {
+ $key = (string) $key;
+ }
+
+ if ('<<' === $key) {
+ $mergeNode = true;
+ $allowOverwrite = true;
+ if (isset($values['value']) && 0 === strpos($values['value'], '*')) {
+ $refName = substr($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 (!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, $exceptionOnInvalidType, $objectSupport, $objectForMap);
+
+ if (!is_array($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 $parsedItem) {
+ if (!is_array($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 += $parsed; // array union
+ }
+ }
+ } elseif (isset($values['value']) && self::preg_match('#^&(?P<ref>[^ ]+) *(?P<value>.*)#u', $values['value'], $matches)) {
+ $isRef = $matches['ref'];
+ $values['value'] = $matches['value'];
+ }
+
+ if ($mergeNode) {
+ // Merge keys
+ } elseif (!isset($values['value']) || '' == trim($values['value'], ' ') || 0 === strpos(ltrim($values['value'], ' '), '#')) {
+ // hash
+ // if next line is less indented or equal, then it means that the current value is null
+ if (!$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])) {
+ $data[$key] = null;
+ }
+ } else {
+ $value = $this->parseBlock($this->getRealCurrentLineNb() + 1, $this->getNextEmbedBlock(), $exceptionOnInvalidType, $objectSupport, $objectForMap);
+ // Spec: Keys MUST be unique; first one wins.
+ // But overwriting is allowed when a merge node is used in current block.
+ if ($allowOverwrite || !isset($data[$key])) {
+ $data[$key] = $value;
+ }
+ }
+ } else {
+ $value = $this->parseValue($values['value'], $exceptionOnInvalidType, $objectSupport, $objectForMap, $context);
+ // Spec: Keys MUST be unique; first one wins.
+ // But overwriting is allowed when a merge node is used in current block.
+ if ($allowOverwrite || !isset($data[$key])) {
+ $data[$key] = $value;
+ }
+ }
+ if ($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, $this->currentLine);
+ }
+
+ // 1-liner optionally followed by newline(s)
+ if (is_string($value) && $this->lines[0] === trim($value)) {
+ try {
+ $value = Inline::parse($this->lines[0], $exceptionOnInvalidType, $objectSupport, $objectForMap, $this->refs);
+ } catch (ParseException $e) {
+ $e->setParsedLine($this->getRealCurrentLineNb() + 1);
+ $e->setSnippet($this->currentLine);
+
+ throw $e;
+ }
+
+ if (isset($mbEncoding)) {
+ mb_internal_encoding($mbEncoding);
+ }
+
+ return $value;
+ }
+
+ throw new ParseException('Unable to parse.', $this->getRealCurrentLineNb() + 1, $this->currentLine);
+ }
+ }
+
+ if (isset($mbEncoding)) {
+ mb_internal_encoding($mbEncoding);
+ }
+
+ if ($objectForMap && !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, $exceptionOnInvalidType, $objectSupport, $objectForMap)
+ {
+ $skippedLineNumbers = $this->skippedLineNumbers;
+
+ foreach ($this->locallySkippedLineNumbers as $lineNumber) {
+ if ($lineNumber < $offset) {
+ continue;
+ }
+
+ $skippedLineNumbers[] = $lineNumber;
+ }
+
+ $parser = new self($offset, $this->totalNumberOfLines, $skippedLineNumbers);
+ $parser->refs = &$this->refs;
+
+ return $parser->parse($yaml, $exceptionOnInvalidType, $objectSupport, $objectForMap);
+ }
+
+ /**
+ * 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[] = $this->getCurrentLineIndentation();
+ }
+
+ if (!$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 >= $this->getCurrentLineIndentation()) {
+ unset($blockScalarIndentations[$key]);
+ }
+ }
+ }
+
+ if (empty($blockScalarIndentations) && !$this->isCurrentLineComment() && $this->isBlockScalarHeader()) {
+ $blockScalarIndentations[] = $this->getCurrentLineIndentation();
+ }
+
+ $previousLineIndentation = $indent;
+
+ if ($isItUnindentedCollection && !$this->isCurrentLineEmpty() && !$this->isStringUnIndentedCollectionItem() && $newIndent === $indent) {
+ $this->moveToPreviousLine();
+ break;
+ }
+
+ if ($this->isCurrentLineBlank()) {
+ $data[] = substr($this->currentLine, $newIndent);
+ continue;
+ }
+
+ // we ignore "comment" lines only when we are not inside a scalar block
+ if (empty($blockScalarIndentations) && $this->isCurrentLineComment()) {
+ // remember ignored comment lines (they are used later in nested
+ // parser calls to determine real line numbers)
+ //
+ // CAUTION: beware to not populate the global property here as it
+ // will otherwise influence the getRealCurrentLineNb() call here
+ // for consecutive comment lines and subsequent embedded blocks
+ $this->locallySkippedLineNumbers[] = $this->getRealCurrentLineNb();
+
+ continue;
+ }
+
+ if ($indent >= $newIndent) {
+ $data[] = substr($this->currentLine, $newIndent);
+ } 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 bool $exceptionOnInvalidType True if an exception must be thrown on invalid types false otherwise
+ * @param bool $objectSupport True if object support is enabled, false otherwise
+ * @param bool $objectForMap true if maps should return a stdClass instead of array()
+ * @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, $exceptionOnInvalidType, $objectSupport, $objectForMap, $context)
+ {
+ if (0 === strpos($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::BLOCK_SCALAR_HEADER_PATTERN.'$/', $value, $matches)) {
+ $modifiers = isset($matches['modifiers']) ? $matches['modifiers'] : '';
+
+ return $this->parseBlockScalar($matches['separator'], preg_replace('#\d+#', '', $modifiers), (int) abs($modifiers));
+ }
+
+ try {
+ $parsedValue = Inline::parse($value, $exceptionOnInvalidType, $objectSupport, $objectForMap, $this->refs);
+
+ if ('mapping' === $context && '"' !== $value[0] && "'" !== $value[0] && '[' !== $value[0] && '{' !== $value[0] && '!' !== $value[0] && false !== strpos($parsedValue, ': ')) {
+ @trigger_error(sprintf('Using a colon in the unquoted mapping value "%s" in line %d is deprecated since Symfony 2.8 and will throw a ParseException in 3.0.', $value, $this->getRealCurrentLineNb() + 1), E_USER_DEPRECATED);
+
+ // to be thrown in 3.0
+ // 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, $count);
+ if ($count == 1) {
+ // 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, $count);
+ if ($count == 1) {
+ // 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;
+ }
+}
projects / yaffs-website / blobdiff