--- /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;
+use Symfony\Component\Yaml\Exception\DumpException;
+
+/**
+ * Inline implements a YAML parser/dumper for the YAML inline syntax.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ */
+class Inline
+{
+ const REGEX_QUOTED_STRING = '(?:"([^"\\\\]*+(?:\\\\.[^"\\\\]*+)*+)"|\'([^\']*+(?:\'\'[^\']*+)*+)\')';
+
+ private static $exceptionOnInvalidType = false;
+ private static $objectSupport = false;
+ private static $objectForMap = false;
+
+ /**
+ * Converts 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()
+ * @param array $references Mapping of variable names to values
+ *
+ * @return mixed A PHP value
+ *
+ * @throws ParseException
+ */
+ public static function parse($value, $exceptionOnInvalidType = false, $objectSupport = false, $objectForMap = false, $references = array())
+ {
+ self::$exceptionOnInvalidType = $exceptionOnInvalidType;
+ self::$objectSupport = $objectSupport;
+ self::$objectForMap = $objectForMap;
+
+ $value = trim($value);
+
+ if ('' === $value) {
+ return '';
+ }
+
+ if (2 /* MB_OVERLOAD_STRING */ & (int) ini_get('mbstring.func_overload')) {
+ $mbEncoding = mb_internal_encoding();
+ mb_internal_encoding('ASCII');
+ }
+
+ $i = 0;
+ switch ($value[0]) {
+ case '[':
+ $result = self::parseSequence($value, $i, $references);
+ ++$i;
+ break;
+ case '{':
+ $result = self::parseMapping($value, $i, $references);
+ ++$i;
+ break;
+ default:
+ $result = self::parseScalar($value, null, array('"', "'"), $i, true, $references);
+ }
+
+ // some comments are allowed at the end
+ if (preg_replace('/\s+#.*$/A', '', substr($value, $i))) {
+ throw new ParseException(sprintf('Unexpected characters near "%s".', substr($value, $i)));
+ }
+
+ if (isset($mbEncoding)) {
+ mb_internal_encoding($mbEncoding);
+ }
+
+ return $result;
+ }
+
+ /**
+ * Dumps a given PHP variable to a YAML string.
+ *
+ * @param mixed $value The PHP variable to convert
+ * @param bool $exceptionOnInvalidType true if an exception must be thrown on invalid types (a PHP resource or object), false otherwise
+ * @param bool $objectSupport true if object support is enabled, false otherwise
+ *
+ * @return string The YAML string representing the PHP value
+ *
+ * @throws DumpException When trying to dump PHP resource
+ */
+ public static function dump($value, $exceptionOnInvalidType = false, $objectSupport = false)
+ {
+ switch (true) {
+ case is_resource($value):
+ if ($exceptionOnInvalidType) {
+ throw new DumpException(sprintf('Unable to dump PHP resources in a YAML file ("%s").', get_resource_type($value)));
+ }
+
+ return 'null';
+ case is_object($value):
+ if ($objectSupport) {
+ return '!php/object:'.serialize($value);
+ }
+
+ if ($exceptionOnInvalidType) {
+ throw new DumpException('Object support when dumping a YAML file has been disabled.');
+ }
+
+ return 'null';
+ case is_array($value):
+ return self::dumpArray($value, $exceptionOnInvalidType, $objectSupport);
+ case null === $value:
+ return 'null';
+ case true === $value:
+ return 'true';
+ case false === $value:
+ return 'false';
+ case ctype_digit($value):
+ return is_string($value) ? "'$value'" : (int) $value;
+ case is_numeric($value):
+ $locale = setlocale(LC_NUMERIC, 0);
+ if (false !== $locale) {
+ setlocale(LC_NUMERIC, 'C');
+ }
+ if (is_float($value)) {
+ $repr = (string) $value;
+ if (is_infinite($value)) {
+ $repr = str_ireplace('INF', '.Inf', $repr);
+ } elseif (floor($value) == $value && $repr == $value) {
+ // Preserve float data type since storing a whole number will result in integer value.
+ $repr = '!!float '.$repr;
+ }
+ } else {
+ $repr = is_string($value) ? "'$value'" : (string) $value;
+ }
+ if (false !== $locale) {
+ setlocale(LC_NUMERIC, $locale);
+ }
+
+ return $repr;
+ case '' == $value:
+ return "''";
+ case Escaper::requiresDoubleQuoting($value):
+ return Escaper::escapeWithDoubleQuotes($value);
+ case Escaper::requiresSingleQuoting($value):
+ case Parser::preg_match(self::getHexRegex(), $value):
+ case Parser::preg_match(self::getTimestampRegex(), $value):
+ return Escaper::escapeWithSingleQuotes($value);
+ default:
+ return $value;
+ }
+ }
+
+ /**
+ * Check if given array is hash or just normal indexed array.
+ *
+ * @internal
+ *
+ * @param array $value The PHP array to check
+ *
+ * @return bool true if value is hash array, false otherwise
+ */
+ public static function isHash(array $value)
+ {
+ $expectedKey = 0;
+
+ foreach ($value as $key => $val) {
+ if ($key !== $expectedKey++) {
+ return true;
+ }
+ }
+
+ return false;
+ }
+
+ /**
+ * Dumps a PHP array to a YAML string.
+ *
+ * @param array $value The PHP array to dump
+ * @param bool $exceptionOnInvalidType true if an exception must be thrown on invalid types (a PHP resource or object), false otherwise
+ * @param bool $objectSupport true if object support is enabled, false otherwise
+ *
+ * @return string The YAML string representing the PHP array
+ */
+ private static function dumpArray($value, $exceptionOnInvalidType, $objectSupport)
+ {
+ // array
+ if ($value && !self::isHash($value)) {
+ $output = array();
+ foreach ($value as $val) {
+ $output[] = self::dump($val, $exceptionOnInvalidType, $objectSupport);
+ }
+
+ return sprintf('[%s]', implode(', ', $output));
+ }
+
+ // hash
+ $output = array();
+ foreach ($value as $key => $val) {
+ $output[] = sprintf('%s: %s', self::dump($key, $exceptionOnInvalidType, $objectSupport), self::dump($val, $exceptionOnInvalidType, $objectSupport));
+ }
+
+ return sprintf('{ %s }', implode(', ', $output));
+ }
+
+ /**
+ * Parses a YAML scalar.
+ *
+ * @param string $scalar
+ * @param string $delimiters
+ * @param array $stringDelimiters
+ * @param int &$i
+ * @param bool $evaluate
+ * @param array $references
+ *
+ * @return string
+ *
+ * @throws ParseException When malformed inline YAML string is parsed
+ *
+ * @internal
+ */
+ public static function parseScalar($scalar, $delimiters = null, $stringDelimiters = array('"', "'"), &$i = 0, $evaluate = true, $references = array())
+ {
+ if (in_array($scalar[$i], $stringDelimiters)) {
+ // quoted scalar
+ $output = self::parseQuotedScalar($scalar, $i);
+
+ if (null !== $delimiters) {
+ $tmp = ltrim(substr($scalar, $i), ' ');
+ if (!in_array($tmp[0], $delimiters)) {
+ throw new ParseException(sprintf('Unexpected characters (%s).', substr($scalar, $i)));
+ }
+ }
+ } else {
+ // "normal" string
+ if (!$delimiters) {
+ $output = substr($scalar, $i);
+ $i += strlen($output);
+
+ // remove comments
+ if (Parser::preg_match('/[ \t]+#/', $output, $match, PREG_OFFSET_CAPTURE)) {
+ $output = substr($output, 0, $match[0][1]);
+ }
+ } elseif (Parser::preg_match('/^(.+?)('.implode('|', $delimiters).')/', substr($scalar, $i), $match)) {
+ $output = $match[1];
+ $i += strlen($output);
+ } else {
+ throw new ParseException(sprintf('Malformed inline YAML string: %s.', $scalar));
+ }
+
+ // a non-quoted string cannot start with @ or ` (reserved) nor with a scalar indicator (| or >)
+ if ($output && ('@' === $output[0] || '`' === $output[0] || '|' === $output[0] || '>' === $output[0])) {
+ @trigger_error(sprintf('Not quoting the scalar "%s" starting with "%s" is deprecated since Symfony 2.8 and will throw a ParseException in 3.0.', $output, $output[0]), E_USER_DEPRECATED);
+
+ // to be thrown in 3.0
+ // throw new ParseException(sprintf('The reserved indicator "%s" cannot start a plain scalar; you need to quote the scalar.', $output[0]));
+ }
+
+ if ($evaluate) {
+ $output = self::evaluateScalar($output, $references);
+ }
+ }
+
+ return $output;
+ }
+
+ /**
+ * Parses a YAML quoted scalar.
+ *
+ * @param string $scalar
+ * @param int &$i
+ *
+ * @return string
+ *
+ * @throws ParseException When malformed inline YAML string is parsed
+ */
+ private static function parseQuotedScalar($scalar, &$i)
+ {
+ if (!Parser::preg_match('/'.self::REGEX_QUOTED_STRING.'/Au', substr($scalar, $i), $match)) {
+ throw new ParseException(sprintf('Malformed inline YAML string: %s.', substr($scalar, $i)));
+ }
+
+ $output = substr($match[0], 1, strlen($match[0]) - 2);
+
+ $unescaper = new Unescaper();
+ if ('"' == $scalar[$i]) {
+ $output = $unescaper->unescapeDoubleQuotedString($output);
+ } else {
+ $output = $unescaper->unescapeSingleQuotedString($output);
+ }
+
+ $i += strlen($match[0]);
+
+ return $output;
+ }
+
+ /**
+ * Parses a YAML sequence.
+ *
+ * @param string $sequence
+ * @param int &$i
+ * @param array $references
+ *
+ * @return array
+ *
+ * @throws ParseException When malformed inline YAML string is parsed
+ */
+ private static function parseSequence($sequence, &$i = 0, $references = array())
+ {
+ $output = array();
+ $len = strlen($sequence);
+ ++$i;
+
+ // [foo, bar, ...]
+ while ($i < $len) {
+ switch ($sequence[$i]) {
+ case '[':
+ // nested sequence
+ $output[] = self::parseSequence($sequence, $i, $references);
+ break;
+ case '{':
+ // nested mapping
+ $output[] = self::parseMapping($sequence, $i, $references);
+ break;
+ case ']':
+ return $output;
+ case ',':
+ case ' ':
+ break;
+ default:
+ $isQuoted = in_array($sequence[$i], array('"', "'"));
+ $value = self::parseScalar($sequence, array(',', ']'), array('"', "'"), $i, true, $references);
+
+ // the value can be an array if a reference has been resolved to an array var
+ if (!is_array($value) && !$isQuoted && false !== strpos($value, ': ')) {
+ // embedded mapping?
+ try {
+ $pos = 0;
+ $value = self::parseMapping('{'.$value.'}', $pos, $references);
+ } catch (\InvalidArgumentException $e) {
+ // no, it's not
+ }
+ }
+
+ $output[] = $value;
+
+ --$i;
+ }
+
+ ++$i;
+ }
+
+ throw new ParseException(sprintf('Malformed inline YAML string: %s.', $sequence));
+ }
+
+ /**
+ * Parses a YAML mapping.
+ *
+ * @param string $mapping
+ * @param int &$i
+ * @param array $references
+ *
+ * @return array|\stdClass
+ *
+ * @throws ParseException When malformed inline YAML string is parsed
+ */
+ private static function parseMapping($mapping, &$i = 0, $references = array())
+ {
+ $output = array();
+ $len = strlen($mapping);
+ ++$i;
+
+ // {foo: bar, bar:foo, ...}
+ while ($i < $len) {
+ switch ($mapping[$i]) {
+ case ' ':
+ case ',':
+ ++$i;
+ continue 2;
+ case '}':
+ if (self::$objectForMap) {
+ return (object) $output;
+ }
+
+ return $output;
+ }
+
+ // key
+ $key = self::parseScalar($mapping, array(':', ' '), array('"', "'"), $i, false);
+
+ // value
+ $done = false;
+
+ while ($i < $len) {
+ switch ($mapping[$i]) {
+ case '[':
+ // nested sequence
+ $value = self::parseSequence($mapping, $i, $references);
+ // Spec: Keys MUST be unique; first one wins.
+ // Parser cannot abort this mapping earlier, since lines
+ // are processed sequentially.
+ if (!isset($output[$key])) {
+ $output[$key] = $value;
+ }
+ $done = true;
+ break;
+ case '{':
+ // nested mapping
+ $value = self::parseMapping($mapping, $i, $references);
+ // Spec: Keys MUST be unique; first one wins.
+ // Parser cannot abort this mapping earlier, since lines
+ // are processed sequentially.
+ if (!isset($output[$key])) {
+ $output[$key] = $value;
+ }
+ $done = true;
+ break;
+ case ':':
+ case ' ':
+ break;
+ default:
+ $value = self::parseScalar($mapping, array(',', '}'), array('"', "'"), $i, true, $references);
+ // Spec: Keys MUST be unique; first one wins.
+ // Parser cannot abort this mapping earlier, since lines
+ // are processed sequentially.
+ if (!isset($output[$key])) {
+ $output[$key] = $value;
+ }
+ $done = true;
+ --$i;
+ }
+
+ ++$i;
+
+ if ($done) {
+ continue 2;
+ }
+ }
+ }
+
+ throw new ParseException(sprintf('Malformed inline YAML string: %s.', $mapping));
+ }
+
+ /**
+ * Evaluates scalars and replaces magic values.
+ *
+ * @param string $scalar
+ * @param array $references
+ *
+ * @return string A YAML string
+ *
+ * @throws ParseException when object parsing support was disabled and the parser detected a PHP object or when a reference could not be resolved
+ */
+ private static function evaluateScalar($scalar, $references = array())
+ {
+ $scalar = trim($scalar);
+ $scalarLower = strtolower($scalar);
+
+ if (0 === strpos($scalar, '*')) {
+ if (false !== $pos = strpos($scalar, '#')) {
+ $value = substr($scalar, 1, $pos - 2);
+ } else {
+ $value = substr($scalar, 1);
+ }
+
+ // an unquoted *
+ if (false === $value || '' === $value) {
+ throw new ParseException('A reference must contain at least one character.');
+ }
+
+ if (!array_key_exists($value, $references)) {
+ throw new ParseException(sprintf('Reference "%s" does not exist.', $value));
+ }
+
+ return $references[$value];
+ }
+
+ switch (true) {
+ case 'null' === $scalarLower:
+ case '' === $scalar:
+ case '~' === $scalar:
+ return;
+ case 'true' === $scalarLower:
+ return true;
+ case 'false' === $scalarLower:
+ return false;
+ // Optimise for returning strings.
+ case $scalar[0] === '+' || $scalar[0] === '-' || $scalar[0] === '.' || $scalar[0] === '!' || is_numeric($scalar[0]):
+ switch (true) {
+ case 0 === strpos($scalar, '!str'):
+ return (string) substr($scalar, 5);
+ case 0 === strpos($scalar, '! '):
+ return (int) self::parseScalar(substr($scalar, 2));
+ case 0 === strpos($scalar, '!php/object:'):
+ if (self::$objectSupport) {
+ return unserialize(substr($scalar, 12));
+ }
+
+ if (self::$exceptionOnInvalidType) {
+ throw new ParseException('Object support when parsing a YAML file has been disabled.');
+ }
+
+ return;
+ case 0 === strpos($scalar, '!!php/object:'):
+ if (self::$objectSupport) {
+ return unserialize(substr($scalar, 13));
+ }
+
+ if (self::$exceptionOnInvalidType) {
+ throw new ParseException('Object support when parsing a YAML file has been disabled.');
+ }
+
+ return;
+ case 0 === strpos($scalar, '!!float '):
+ return (float) substr($scalar, 8);
+ case ctype_digit($scalar):
+ $raw = $scalar;
+ $cast = (int) $scalar;
+
+ return '0' == $scalar[0] ? octdec($scalar) : (((string) $raw == (string) $cast) ? $cast : $raw);
+ case '-' === $scalar[0] && ctype_digit(substr($scalar, 1)):
+ $raw = $scalar;
+ $cast = (int) $scalar;
+
+ return '0' == $scalar[1] ? octdec($scalar) : (((string) $raw === (string) $cast) ? $cast : $raw);
+ case is_numeric($scalar):
+ case Parser::preg_match(self::getHexRegex(), $scalar):
+ return '0x' === $scalar[0].$scalar[1] ? hexdec($scalar) : (float) $scalar;
+ case '.inf' === $scalarLower:
+ case '.nan' === $scalarLower:
+ return -log(0);
+ case '-.inf' === $scalarLower:
+ return log(0);
+ case Parser::preg_match('/^(-|\+)?[0-9,]+(\.[0-9]+)?$/', $scalar):
+ return (float) str_replace(',', '', $scalar);
+ case Parser::preg_match(self::getTimestampRegex(), $scalar):
+ $timeZone = date_default_timezone_get();
+ date_default_timezone_set('UTC');
+ $time = strtotime($scalar);
+ date_default_timezone_set($timeZone);
+
+ return $time;
+ }
+ default:
+ return (string) $scalar;
+ }
+ }
+
+ /**
+ * Gets a regex that matches a YAML date.
+ *
+ * @return string The regular expression
+ *
+ * @see http://www.yaml.org/spec/1.2/spec.html#id2761573
+ */
+ private static function getTimestampRegex()
+ {
+ return <<<EOF
+ ~^
+ (?P<year>[0-9][0-9][0-9][0-9])
+ -(?P<month>[0-9][0-9]?)
+ -(?P<day>[0-9][0-9]?)
+ (?:(?:[Tt]|[ \t]+)
+ (?P<hour>[0-9][0-9]?)
+ :(?P<minute>[0-9][0-9])
+ :(?P<second>[0-9][0-9])
+ (?:\.(?P<fraction>[0-9]*))?
+ (?:[ \t]*(?P<tz>Z|(?P<tz_sign>[-+])(?P<tz_hour>[0-9][0-9]?)
+ (?::(?P<tz_minute>[0-9][0-9]))?))?)?
+ $~x
+EOF;
+ }
+
+ /**
+ * Gets a regex that matches a YAML number in hexadecimal notation.
+ *
+ * @return string
+ */
+ private static function getHexRegex()
+ {
+ return '~^0x[0-9a-f]++$~i';
+ }
+}
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