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<?php |
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/** |
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* \AppserverIo\Doppelgaenger\Utils\Parser |
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* |
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* NOTICE OF LICENSE |
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* |
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* This source file is subject to the Open Software License (OSL 3.0) |
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* that is available through the world-wide-web at this URL: |
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* http://opensource.org/licenses/osl-3.0.php |
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* |
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* PHP version 5 |
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* |
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* @author Bernhard Wick <[email protected]> |
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* @copyright 2015 TechDivision GmbH - <[email protected]> |
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* @license http://opensource.org/licenses/osl-3.0.php Open Software License (OSL 3.0) |
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* @link https://github.com/appserver-io/doppelgaenger |
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* @link http://www.appserver.io/ |
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*/ |
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namespace AppserverIo\Doppelgaenger\Utils; |
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/** |
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* Will provide basic parsing methods for analyzing and code structures |
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* |
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* @author Bernhard Wick <[email protected]> |
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* @copyright 2015 TechDivision GmbH - <[email protected]> |
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* @license http://opensource.org/licenses/osl-3.0.php Open Software License (OSL 3.0) |
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* @link https://github.com/appserver-io/doppelgaenger |
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* @link http://www.appserver.io/ |
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*/ |
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class Parser |
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{ |
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/** |
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* Will get the count of certain brackets within a string. |
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* Will return an integer which is calculated as the number of opening brackets against closing ones. |
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* |
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* @param string $string The string to search in |
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* @param string $bracketType A bracket to be taken as general bracket type e.g. '(' |
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* |
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* @return integer |
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*/ |
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public function getBracketCount($string, $bracketType) |
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{ |
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// prepare opening and closing bracket according to bracket type |
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View Code Duplication |
switch ($bracketType) { |
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case '(': |
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case ')': |
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$openingBracket = '('; |
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$closingBracket = ')'; |
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break; |
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case '{': |
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case '}': |
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$openingBracket = '{'; |
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$closingBracket = '}'; |
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break; |
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case '[': |
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case ']': |
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$openingBracket = '['; |
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$closingBracket = ']'; |
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break; |
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default: |
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throw new \Exception(sprintf('Unrecognized bracket type %s', $bracketType)); |
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} |
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return substr_count($string, $openingBracket) - substr_count($string, $closingBracket); |
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} |
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/** |
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* Will return an integer value representing the length of the first portion of the given string which is completely |
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* enclosed by a certain bracket type. |
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* Will return 0 if nothing is found. |
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* |
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* @param string $string String to investigate |
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* @param string $bracketType A bracket to be taken as general bracket type e.g. '(' |
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* @param integer $offset Offset at which to start looking, will default to 0 |
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* |
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* @return integer |
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*/ |
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public function getBracketSpan($string, $bracketType, $offset = 0) |
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{ |
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// prepare opening and closing bracket according to bracket type |
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View Code Duplication |
switch ($bracketType) { |
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case '(': |
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case ')': |
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$openingBracket = '('; |
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$closingBracket = ')'; |
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break; |
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case '{': |
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case '}': |
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$openingBracket = '{'; |
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$closingBracket = '}'; |
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break; |
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case '[': |
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case ']': |
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$openingBracket = '['; |
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$closingBracket = ']'; |
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break; |
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default: |
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throw new \Exception(sprintf('Unrecognized bracket type %s', $bracketType)); |
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} |
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// split up the string and analyse it character for character |
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$bracketCounter = null; |
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$stringArray = str_split($string); |
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$strlen = strlen($string); |
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$firstBracket = 0; |
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for ($i = $offset; $i < $strlen; $i++) { |
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// count different bracket types by de- and increasing the counter |
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if ($stringArray[$i] === $openingBracket) { |
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if (is_null($bracketCounter)) { |
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$firstBracket = $i; |
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} |
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$bracketCounter = (int) $bracketCounter + 1; |
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} elseif ($stringArray[$i] === $closingBracket) { |
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$bracketCounter = (int) $bracketCounter - 1; |
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} |
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// if we reach 0 again we have a completely enclosed string |
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if ($bracketCounter === 0) { |
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return $i + 1 - $firstBracket; |
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} |
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} |
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return 0; |
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} |
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/** |
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* Will return the length of the string a token array is based on. |
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* |
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* @param array $tokens The token array |
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* |
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* @return integer |
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*/ |
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public function getStringLength($tokens) |
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{ |
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// Iterator over the tokens and get their length |
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$result = 0; |
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$tokenCount = count($tokens); |
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for ($i = 0; $i < $tokenCount; $i++) { |
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if (is_array($tokens[$i])) { |
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$result += strlen($tokens[$i][1]); |
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} else { |
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$result += strlen($tokens[$i]); |
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} |
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} |
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return $result; |
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} |
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} |
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appserver-io /
doppelgaenger
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