--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/symfony/src/Symfony/Component/Yaml/Parser.php Sat Sep 24 15:40:41 2011 +0200
@@ -0,0 +1,556 @@
+<?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
+{
+ private $offset = 0;
+ private $lines = array();
+ private $currentLineNb = -1;
+ private $currentLine = '';
+ private $refs = array();
+
+ /**
+ * Constructor
+ *
+ * @param integer $offset The offset of YAML document (used for line numbers in error messages)
+ */
+ public function __construct($offset = 0)
+ {
+ $this->offset = $offset;
+ }
+
+ /**
+ * Parses a YAML string to a PHP value.
+ *
+ * @param string $value A YAML string
+ *
+ * @return mixed A PHP value
+ *
+ * @throws ParseException If the YAML is not valid
+ */
+ public function parse($value)
+ {
+ $this->currentLineNb = -1;
+ $this->currentLine = '';
+ $this->lines = explode("\n", $this->cleanup($value));
+
+ if (function_exists('mb_detect_encoding') && false === mb_detect_encoding($value, 'UTF-8', true)) {
+ throw new ParseException('The YAML value does not appear to be valid UTF-8.');
+ }
+
+ if (function_exists('mb_internal_encoding') && ((int) ini_get('mbstring.func_overload')) & 2) {
+ $mbEncoding = mb_internal_encoding();
+ mb_internal_encoding('UTF-8');
+ }
+
+ $data = array();
+ while ($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 = $isInPlace = $isProcessed = false;
+ if (preg_match('#^\-((?P<leadspaces>\s+)(?P<value>.+?))?\s*$#u', $this->currentLine, $values)) {
+ if (isset($values['value']) && 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'], ' '), '#')) {
+ $c = $this->getRealCurrentLineNb() + 1;
+ $parser = new Parser($c);
+ $parser->refs =& $this->refs;
+ $data[] = $parser->parse($this->getNextEmbedBlock());
+ } else {
+ if (isset($values['leadspaces'])
+ && ' ' == $values['leadspaces']
+ && preg_match('#^(?P<key>'.Inline::REGEX_QUOTED_STRING.'|[^ \'"\{\[].*?) *\:(\s+(?P<value>.+?))?\s*$#u', $values['value'], $matches)
+ ) {
+ // this is a compact notation element, add to next block and parse
+ $c = $this->getRealCurrentLineNb();
+ $parser = new Parser($c);
+ $parser->refs =& $this->refs;
+
+ $block = $values['value'];
+ if (!$this->isNextLineIndented()) {
+ $block .= "\n".$this->getNextEmbedBlock($this->getCurrentLineIndentation() + 2);
+ }
+
+ $data[] = $parser->parse($block);
+ } else {
+ $data[] = $this->parseValue($values['value']);
+ }
+ }
+ } else if (preg_match('#^(?P<key>'.Inline::REGEX_QUOTED_STRING.'|[^ \'"\[\{].*?) *\:(\s+(?P<value>.+?))?\s*$#u', $this->currentLine, $values)) {
+ try {
+ $key = Inline::parseScalar($values['key']);
+ } catch (ParseException $e) {
+ $e->setParsedLine($this->getRealCurrentLineNb() + 1);
+ $e->setSnippet($this->currentLine);
+
+ throw $e;
+ }
+
+ if ('<<' === $key) {
+ if (isset($values['value']) && '*' === substr($values['value'], 0, 1)) {
+ $isInPlace = substr($values['value'], 1);
+ if (!array_key_exists($isInPlace, $this->refs)) {
+ throw new ParseException(sprintf('Reference "%s" does not exist.', $isInPlace), $this->getRealCurrentLineNb() + 1, $this->currentLine);
+ }
+ } else {
+ if (isset($values['value']) && $values['value'] !== '') {
+ $value = $values['value'];
+ } else {
+ $value = $this->getNextEmbedBlock();
+ }
+ $c = $this->getRealCurrentLineNb() + 1;
+ $parser = new Parser($c);
+ $parser->refs =& $this->refs;
+ $parsed = $parser->parse($value);
+
+ $merged = array();
+ if (!is_array($parsed)) {
+ throw new ParseException('YAML merge keys used with a scalar value instead of an array.', $this->getRealCurrentLineNb() + 1, $this->currentLine);
+ } else if (isset($parsed[0])) {
+ // Numeric array, merge individual elements
+ foreach (array_reverse($parsed) as $parsedItem) {
+ if (!is_array($parsedItem)) {
+ throw new ParseException('Merge items must be arrays.', $this->getRealCurrentLineNb() + 1, $parsedItem);
+ }
+ $merged = array_merge($parsedItem, $merged);
+ }
+ } else {
+ // Associative array, merge
+ $merged = array_merge($merged, $parsed);
+ }
+
+ $isProcessed = $merged;
+ }
+ } else if (isset($values['value']) && preg_match('#^&(?P<ref>[^ ]+) *(?P<value>.*)#u', $values['value'], $matches)) {
+ $isRef = $matches['ref'];
+ $values['value'] = $matches['value'];
+ }
+
+ if ($isProcessed) {
+ // Merge keys
+ $data = $isProcessed;
+ // hash
+ } else if (!isset($values['value']) || '' == trim($values['value'], ' ') || 0 === strpos(ltrim($values['value'], ' '), '#')) {
+ // if next line is less indented or equal, then it means that the current value is null
+ if ($this->isNextLineIndented()) {
+ $data[$key] = null;
+ } else {
+ $c = $this->getRealCurrentLineNb() + 1;
+ $parser = new Parser($c);
+ $parser->refs =& $this->refs;
+ $data[$key] = $parser->parse($this->getNextEmbedBlock());
+ }
+ } else {
+ if ($isInPlace) {
+ $data = $this->refs[$isInPlace];
+ } else {
+ $data[$key] = $this->parseValue($values['value']);
+ }
+ }
+ } else {
+ // 1-liner followed by newline
+ if (2 == count($this->lines) && empty($this->lines[1])) {
+ try {
+ $value = Inline::parse($this->lines[0]);
+ } catch (ParseException $e) {
+ $e->setParsedLine($this->getRealCurrentLineNb() + 1);
+ $e->setSnippet($this->currentLine);
+
+ throw $e;
+ }
+
+ if (is_array($value)) {
+ $first = reset($value);
+ if (is_string($first) && '*' === substr($first, 0, 1)) {
+ $data = array();
+ foreach ($value as $alias) {
+ $data[] = $this->refs[substr($alias, 1)];
+ }
+ $value = $data;
+ }
+ }
+
+ if (isset($mbEncoding)) {
+ mb_internal_encoding($mbEncoding);
+ }
+
+ return $value;
+ }
+
+ 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:
+ $error = 'Unable to parse.';
+ }
+
+ throw new ParseException($error, $this->getRealCurrentLineNb() + 1, $this->currentLine);
+ }
+
+ if ($isRef) {
+ $this->refs[$isRef] = end($data);
+ }
+ }
+
+ if (isset($mbEncoding)) {
+ mb_internal_encoding($mbEncoding);
+ }
+
+ return empty($data) ? null : $data;
+ }
+
+ /**
+ * Returns the current line number (takes the offset into account).
+ *
+ * @return integer The current line number
+ */
+ private function getRealCurrentLineNb()
+ {
+ return $this->currentLineNb + $this->offset;
+ }
+
+ /**
+ * Returns the current line indentation.
+ *
+ * @return integer The current line indentation
+ */
+ private function getCurrentLineIndentation()
+ {
+ return strlen($this->currentLine) - strlen(ltrim($this->currentLine, ' '));
+ }
+
+ /**
+ * Returns the next embed block of YAML.
+ *
+ * @param integer $indentation The indent level at which the block is to be read, or null for default
+ *
+ * @return string A YAML string
+ *
+ * @throws ParseException When indentation problem are detected
+ */
+ private function getNextEmbedBlock($indentation = null)
+ {
+ $this->moveToNextLine();
+
+ if (null === $indentation) {
+ $newIndent = $this->getCurrentLineIndentation();
+
+ if (!$this->isCurrentLineEmpty() && 0 == $newIndent) {
+ throw new ParseException('Indentation problem.', $this->getRealCurrentLineNb() + 1, $this->currentLine);
+ }
+ } else {
+ $newIndent = $indentation;
+ }
+
+ $data = array(substr($this->currentLine, $newIndent));
+
+ while ($this->moveToNextLine()) {
+ if ($this->isCurrentLineEmpty()) {
+ if ($this->isCurrentLineBlank()) {
+ $data[] = substr($this->currentLine, $newIndent);
+ }
+
+ continue;
+ }
+
+ $indent = $this->getCurrentLineIndentation();
+
+ if (preg_match('#^(?P<text> *)$#', $this->currentLine, $match)) {
+ // empty line
+ $data[] = $match['text'];
+ } else if ($indent >= $newIndent) {
+ $data[] = substr($this->currentLine, $newIndent);
+ } else if (0 == $indent) {
+ $this->moveToPreviousLine();
+
+ break;
+ } else {
+ throw new ParseException('Indentation problem.', $this->getRealCurrentLineNb() + 1, $this->currentLine);
+ }
+ }
+
+ return implode("\n", $data);
+ }
+
+ /**
+ * Moves the parser to the next line.
+ *
+ * @return Boolean
+ */
+ private function moveToNextLine()
+ {
+ if ($this->currentLineNb >= count($this->lines) - 1) {
+ return false;
+ }
+
+ $this->currentLine = $this->lines[++$this->currentLineNb];
+
+ return true;
+ }
+
+ /**
+ * Moves the parser to the previous line.
+ */
+ private function moveToPreviousLine()
+ {
+ $this->currentLine = $this->lines[--$this->currentLineNb];
+ }
+
+ /**
+ * Parses a YAML value.
+ *
+ * @param string $value A YAML value
+ *
+ * @return mixed A PHP value
+ *
+ * @throws ParseException When reference does not exist
+ */
+ private function parseValue($value)
+ {
+ if ('*' === substr($value, 0, 1)) {
+ 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->currentLine);
+ }
+
+ return $this->refs[$value];
+ }
+
+ if (preg_match('/^(?P<separator>\||>)(?P<modifiers>\+|\-|\d+|\+\d+|\-\d+|\d+\+|\d+\-)?(?P<comments> +#.*)?$/', $value, $matches)) {
+ $modifiers = isset($matches['modifiers']) ? $matches['modifiers'] : '';
+
+ return $this->parseFoldedScalar($matches['separator'], preg_replace('#\d+#', '', $modifiers), intval(abs($modifiers)));
+ }
+
+ try {
+ return Inline::parse($value);
+ } catch (ParseException $e) {
+ $e->setParsedLine($this->getRealCurrentLineNb() + 1);
+ $e->setSnippet($this->currentLine);
+
+ throw $e;
+ }
+ }
+
+ /**
+ * Parses a folded scalar.
+ *
+ * @param string $separator The separator that was used to begin this folded scalar (| or >)
+ * @param string $indicator The indicator that was used to begin this folded scalar (+ or -)
+ * @param integer $indentation The indentation that was used to begin this folded scalar
+ *
+ * @return string The text value
+ */
+ private function parseFoldedScalar($separator, $indicator = '', $indentation = 0)
+ {
+ $separator = '|' == $separator ? "\n" : ' ';
+ $text = '';
+
+ $notEOF = $this->moveToNextLine();
+
+ while ($notEOF && $this->isCurrentLineBlank()) {
+ $text .= "\n";
+
+ $notEOF = $this->moveToNextLine();
+ }
+
+ if (!$notEOF) {
+ return '';
+ }
+
+ if (!preg_match('#^(?P<indent>'.($indentation ? str_repeat(' ', $indentation) : ' +').')(?P<text>.*)$#u', $this->currentLine, $matches)) {
+ $this->moveToPreviousLine();
+
+ return '';
+ }
+
+ $textIndent = $matches['indent'];
+ $previousIndent = 0;
+
+ $text .= $matches['text'].$separator;
+ while ($this->currentLineNb + 1 < count($this->lines)) {
+ $this->moveToNextLine();
+
+ if (preg_match('#^(?P<indent> {'.strlen($textIndent).',})(?P<text>.+)$#u', $this->currentLine, $matches)) {
+ if (' ' == $separator && $previousIndent != $matches['indent']) {
+ $text = substr($text, 0, -1)."\n";
+ }
+ $previousIndent = $matches['indent'];
+
+ $text .= str_repeat(' ', $diff = strlen($matches['indent']) - strlen($textIndent)).$matches['text'].($diff ? "\n" : $separator);
+ } else if (preg_match('#^(?P<text> *)$#', $this->currentLine, $matches)) {
+ $text .= preg_replace('#^ {1,'.strlen($textIndent).'}#', '', $matches['text'])."\n";
+ } else {
+ $this->moveToPreviousLine();
+
+ break;
+ }
+ }
+
+ if (' ' == $separator) {
+ // replace last separator by a newline
+ $text = preg_replace('/ (\n*)$/', "\n$1", $text);
+ }
+
+ switch ($indicator) {
+ case '':
+ $text = preg_replace('#\n+$#s', "\n", $text);
+ break;
+ case '+':
+ break;
+ case '-':
+ $text = preg_replace('#\n+$#s', '', $text);
+ break;
+ }
+
+ return $text;
+ }
+
+ /**
+ * Returns true if the next line is indented.
+ *
+ * @return Boolean Returns true if the next line is indented, false otherwise
+ */
+ private function isNextLineIndented()
+ {
+ $currentIndentation = $this->getCurrentLineIndentation();
+ $notEOF = $this->moveToNextLine();
+
+ while ($notEOF && $this->isCurrentLineEmpty()) {
+ $notEOF = $this->moveToNextLine();
+ }
+
+ if (false === $notEOF) {
+ return false;
+ }
+
+ $ret = false;
+ if ($this->getCurrentLineIndentation() <= $currentIndentation) {
+ $ret = true;
+ }
+
+ $this->moveToPreviousLine();
+
+ return $ret;
+ }
+
+ /**
+ * Returns true if the current line is blank or if it is a comment line.
+ *
+ * @return Boolean Returns true if the current line is empty or if it is a comment line, false otherwise
+ */
+ private function isCurrentLineEmpty()
+ {
+ return $this->isCurrentLineBlank() || $this->isCurrentLineComment();
+ }
+
+ /**
+ * Returns true if the current line is blank.
+ *
+ * @return Boolean Returns true if the current line is blank, false otherwise
+ */
+ private function isCurrentLineBlank()
+ {
+ return '' == trim($this->currentLine, ' ');
+ }
+
+ /**
+ * Returns true if the current line is a comment line.
+ *
+ * @return Boolean 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[0] === '#';
+ }
+
+ /**
+ * 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", $value);
+
+ if (!preg_match("#\n$#", $value)) {
+ $value .= "\n";
+ }
+
+ // strip YAML header
+ $count = 0;
+ $value = preg_replace('#^\%YAML[: ][\d\.]+.*\n#su', '', $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 (...)
+ $value = preg_replace('#\.\.\.\s*$#s', '', $value);
+ }
+
+ return $value;
+ }
+}