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<?php
/*
* This file is part of the symfony package.
* (c) Fabien Potencier <fabien.potencier@symfony-project.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
require_once dirname(__FILE__).'/sfYaml.php';
/**
* sfYamlInline implements a YAML parser/dumper for the YAML inline syntax.
*
* @package symfony
* @subpackage yaml
* @author Fabien Potencier <fabien.potencier@symfony-project.com>
* @version SVN: $Id: sfYamlInline.class.php 16177 2009-03-11 08:32:48Z fabien $
*/
class sfYamlInline
{
const REGEX_QUOTED_STRING = '(?:"([^"\\\\]*(?:\\\\.[^"\\\\]*)*)"|\'([^\']*(?:\'\'[^\']*)*)\')';
/**
* Convert a YAML string to a PHP array.
*
* @param string $value A YAML string
*
* @return array A PHP array representing the YAML string
*/
static public function load($value)
{
$value = trim($value);
if (0 == strlen($value))
{
return '';
}
if (function_exists('mb_internal_encoding') && ((int) ini_get('mbstring.func_overload')) & 2)
{
$mbEncoding = mb_internal_encoding();
mb_internal_encoding('ASCII');
}
switch ($value[0])
{
case '[':
$result = self::parseSequence($value);
break;
case '{':
$result = self::parseMapping($value);
break;
default:
$result = self::parseScalar($value);
}
if (isset($mbEncoding))
{
mb_internal_encoding($mbEncoding);
}
return $result;
}
/**
* Dumps a given PHP variable to a YAML string.
*
* @param mixed $value The PHP variable to convert
*
* @return string The YAML string representing the PHP array
*/
static public function dump($value)
{
if ('1.1' === sfYaml::getSpecVersion())
{
$trueValues = array('true', 'on', '+', 'yes', 'y');
$falseValues = array('false', 'off', '-', 'no', 'n');
}
else
{
$trueValues = array('true');
$falseValues = array('false');
}
switch (true)
{
case is_resource($value):
throw new InvalidArgumentException('Unable to dump PHP resources in a YAML file.');
case is_object($value):
return '!!php/object:'.serialize($value);
case is_array($value):
return self::dumpArray($value);
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):
return is_infinite($value) ? str_ireplace('INF', '.Inf', strval($value)) : (is_string($value) ? "'$value'" : $value);
case false !== strpos($value, "\n") || false !== strpos($value, "\r"):
return sprintf('"%s"', str_replace(array('"', "\n", "\r"), array('\\"', '\n', '\r'), $value));
case preg_match('/[ \s \' " \: \{ \} \[ \] , & \* \# \?] | \A[ - ? | < > = ! % @ ` ]/x', $value):
return sprintf("'%s'", str_replace('\'', '\'\'', $value));
case '' == $value:
return "''";
case preg_match(self::getTimestampRegex(), $value):
return "'$value'";
case in_array(strtolower($value), $trueValues):
return "'$value'";
case in_array(strtolower($value), $falseValues):
return "'$value'";
case in_array(strtolower($value), array('null', '~')):
return "'$value'";
default:
return $value;
}
}
/**
* Dumps a PHP array to a YAML string.
*
* @param array $value The PHP array to dump
*
* @return string The YAML string representing the PHP array
*/
static protected function dumpArray($value)
{
// array
$keys = array_keys($value);
if (
(1 == count($keys) && '0' == $keys[0])
||
(count($keys) > 1 && array_reduce($keys, create_function('$v,$w', 'return (integer) $v + $w;'), 0) == count($keys) * (count($keys) - 1) / 2))
{
$output = array();
foreach ($value as $val)
{
$output[] = self::dump($val);
}
return sprintf('[%s]', implode(', ', $output));
}
// mapping
$output = array();
foreach ($value as $key => $val)
{
$output[] = sprintf('%s: %s', self::dump($key), self::dump($val));
}
return sprintf('{ %s }', implode(', ', $output));
}
/**
* Parses a scalar to a YAML string.
*
* @param scalar $scalar
* @param string $delimiters
* @param array $stringDelimiter
* @param integer $i
* @param boolean $evaluate
*
* @return string A YAML string
*/
static public function parseScalar($scalar, $delimiters = null, $stringDelimiters = array('"', "'"), &$i = 0, $evaluate = true)
{
if (in_array($scalar[$i], $stringDelimiters))
{
// quoted scalar
$output = self::parseQuotedScalar($scalar, $i);
}
else
{
// "normal" string
if (!$delimiters)
{
$output = substr($scalar, $i);
$i += strlen($output);
// remove comments
if (false !== $strpos = strpos($output, ' #'))
{
$output = rtrim(substr($output, 0, $strpos));
}
}
else if (preg_match('/^(.+?)('.implode('|', $delimiters).')/', substr($scalar, $i), $match))
{
$output = $match[1];
$i += strlen($output);
}
else
{
throw new InvalidArgumentException(sprintf('Malformed inline YAML string (%s).', $scalar));
}
$output = $evaluate ? self::evaluateScalar($output) : $output;
}
return $output;
}
/**
* Parses a quoted scalar to YAML.
*
* @param string $scalar
* @param integer $i
*
* @return string A YAML string
*/
static protected function parseQuotedScalar($scalar, &$i)
{
if (!preg_match('/'.self::REGEX_QUOTED_STRING.'/A', substr($scalar, $i), $match))
{
throw new InvalidArgumentException(sprintf('Malformed inline YAML string (%s).', substr($scalar, $i)));
}
$output = substr($match[0], 1, strlen($match[0]) - 2);
if ('"' == $scalar[$i])
{
// evaluate the string
$output = str_replace(array('\\"', '\\n', '\\r'), array('"', "\n", "\r"), $output);
}
else
{
// unescape '
$output = str_replace('\'\'', '\'', $output);
}
$i += strlen($match[0]);
return $output;
}
/**
* Parses a sequence to a YAML string.
*
* @param string $sequence
* @param integer $i
*
* @return string A YAML string
*/
static protected function parseSequence($sequence, &$i = 0)
{
$output = array();
$len = strlen($sequence);
$i += 1;
// [foo, bar, ...]
while ($i < $len)
{
switch ($sequence[$i])
{
case '[':
// nested sequence
$output[] = self::parseSequence($sequence, $i);
break;
case '{':
// nested mapping
$output[] = self::parseMapping($sequence, $i);
break;
case ']':
return $output;
case ',':
case ' ':
break;
default:
$isQuoted = in_array($sequence[$i], array('"', "'"));
$value = self::parseScalar($sequence, array(',', ']'), array('"', "'"), $i);
if (!$isQuoted && false !== strpos($value, ': '))
{
// embedded mapping?
try
{
$value = self::parseMapping('{'.$value.'}');
}
catch (InvalidArgumentException $e)
{
// no, it's not
}
}
$output[] = $value;
--$i;
}
++$i;
}
throw new InvalidArgumentException(sprintf('Malformed inline YAML string %s', $sequence));
}
/**
* Parses a mapping to a YAML string.
*
* @param string $mapping
* @param integer $i
*
* @return string A YAML string
*/
static protected function parseMapping($mapping, &$i = 0)
{
$output = array();
$len = strlen($mapping);
$i += 1;
// {foo: bar, bar:foo, ...}
while ($i < $len)
{
switch ($mapping[$i])
{
case ' ':
case ',':
++$i;
continue 2;
case '}':
return $output;
}
// key
$key = self::parseScalar($mapping, array(':', ' '), array('"', "'"), $i, false);
// value
$done = false;
while ($i < $len)
{
switch ($mapping[$i])
{
case '[':
// nested sequence
$output[$key] = self::parseSequence($mapping, $i);
$done = true;
break;
case '{':
// nested mapping
$output[$key] = self::parseMapping($mapping, $i);
$done = true;
break;
case ':':
case ' ':
break;
default:
$output[$key] = self::parseScalar($mapping, array(',', '}'), array('"', "'"), $i);
$done = true;
--$i;
}
++$i;
if ($done)
{
continue 2;
}
}
}
throw new InvalidArgumentException(sprintf('Malformed inline YAML string %s', $mapping));
}
/**
* Evaluates scalars and replaces magic values.
*
* @param string $scalar
*
* @return string A YAML string
*/
static protected function evaluateScalar($scalar)
{
$scalar = trim($scalar);
if ('1.1' === sfYaml::getSpecVersion())
{
$trueValues = array('true', 'on', '+', 'yes', 'y');
$falseValues = array('false', 'off', '-', 'no', 'n');
}
else
{
$trueValues = array('true');
$falseValues = array('false');
}
switch (true)
{
case 'null' == strtolower($scalar):
case '' == $scalar:
case '~' == $scalar:
return null;
case 0 === strpos($scalar, '!str'):
return (string) substr($scalar, 5);
case 0 === strpos($scalar, '! '):
return intval(self::parseScalar(substr($scalar, 2)));
case 0 === strpos($scalar, '!!php/object:'):
return unserialize(substr($scalar, 13));
case ctype_digit($scalar):
$raw = $scalar;
$cast = intval($scalar);
return '0' == $scalar[0] ? octdec($scalar) : (((string) $raw == (string) $cast) ? $cast : $raw);
case in_array(strtolower($scalar), $trueValues):
return true;
case in_array(strtolower($scalar), $falseValues):
return false;
case is_numeric($scalar):
return '0x' == $scalar[0].$scalar[1] ? hexdec($scalar) : floatval($scalar);
case 0 == strcasecmp($scalar, '.inf'):
case 0 == strcasecmp($scalar, '.NaN'):
return -log(0);
case 0 == strcasecmp($scalar, '-.inf'):
return log(0);
case preg_match('/^(-|\+)?[0-9,]+(\.[0-9]+)?$/', $scalar):
return floatval(str_replace(',', '', $scalar));
case preg_match(self::getTimestampRegex(), $scalar):
return strtotime($scalar);
default:
return (string) $scalar;
}
}
static protected 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;
}
}