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home/lmsyaran/public_html/libraries/vendor/symfony/yaml/Parser.php000064400000100467151156413060021522
0ustar00<?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();
/**
* @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->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, $exceptionOnInvalidType,
$objectSupport, $objectForMap);
} 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, $exceptionOnInvalidType = false,
$objectSupport = false, $objectForMap = false)
{
$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);
}
$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 ('<<' === $key &&
(!isset($values['value']) ||
!self::preg_match('#^&(?P<ref>[^ ]+)#u',
$values['value'], $refMatches))) {
$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 ('<<' !== $key &&
isset($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'], ' '), '#') ||
'<<' === $key) {
// hash
// if next line is less indented or equal, then it
means that the current value is null
if (!$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])) {
$data[$key] = null;
}
} else {
$value =
$this->parseBlock($this->getRealCurrentLineNb() + 1,
$this->getNextEmbedBlock(), $exceptionOnInvalidType, $objectSupport,
$objectForMap);
if ('<<' === $key) {
$this->refs[$refMatches['ref']] =
$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.
$data[$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;
}
return $value;
}
throw new ParseException('Unable to parse.',
$this->getRealCurrentLineNb() + 1, $this->currentLine);
}
}
if ($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 $parser->doParse($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 (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;
}
}
home/lmsyaran/public_html/j3/libraries/vendor/symfony/yaml/Parser.php000064400000100467151161024270022033
0ustar00<?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();
/**
* @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->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, $exceptionOnInvalidType,
$objectSupport, $objectForMap);
} 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, $exceptionOnInvalidType = false,
$objectSupport = false, $objectForMap = false)
{
$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);
}
$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 ('<<' === $key &&
(!isset($values['value']) ||
!self::preg_match('#^&(?P<ref>[^ ]+)#u',
$values['value'], $refMatches))) {
$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 ('<<' !== $key &&
isset($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'], ' '), '#') ||
'<<' === $key) {
// hash
// if next line is less indented or equal, then it
means that the current value is null
if (!$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])) {
$data[$key] = null;
}
} else {
$value =
$this->parseBlock($this->getRealCurrentLineNb() + 1,
$this->getNextEmbedBlock(), $exceptionOnInvalidType, $objectSupport,
$objectForMap);
if ('<<' === $key) {
$this->refs[$refMatches['ref']] =
$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.
$data[$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;
}
return $value;
}
throw new ParseException('Unable to parse.',
$this->getRealCurrentLineNb() + 1, $this->currentLine);
}
}
if ($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 $parser->doParse($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 (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;
}
}