| 0,0 → 1,98 |
|---|
| <?php |
| |
| class DirectoryHashCalculator { |
| /* |
| |
| Directory Hash V3 by Daniel Marschall |
| |
| <directoryhash> ::= SHA1(<directorycontext>) |
| <directorycontext> ::= "" | <entry> |
| <entries> ::= <entry> ["|" <entry>] |
| IMPORTANT: (MD5) SORTED ASCENDING! |
| <entry> ::= <file_md5_hash> <filenames> |
| <filenames> ::= "*" <relative_directory> <filename> [<filenames>] |
| IMPORTANT: (RelativeDir+Filename) SORTED ASCENDING! |
| <file_md5_hash> ::= MD5(FILECONTENT(<relative_directory> <filename>)) |
| <filename> ::= given. |
| IMPORTANT: All directories (this automatically |
| excludes "", "." and "..") and non-existing resp. |
| non-readable files are not included. |
| addFile() will return false. |
| <relative_directory> ::= given. |
| Note: Usually, the directory is in relative diction. |
| IMPORTANT: "./" is always stripped from beginning! |
| IMPORTANT: "\" is made to "/"! |
| |
| Example: |
| "" --> Empty directory |
| <hash1>*<file1_with_hash1>*<file2_with_hash1>|<hash2>*<file1_with_hash2> |
| |
| */ |
| |
| private $hashes; |
| |
| function __construct() { |
| $this->clear(); |
| } |
| |
| private static function makeFilenameConsistently(&$filename) { |
| // Rule 1: Cut off "./" from beginning |
| if (substr($filename, 0, 2) == './') { |
| $filename = substr($filename, 2, strlen($filename)-2); |
| } |
| |
| // Rule 2: Use "/" instead of "\" |
| $filename = str_replace('\\', '/', $filename); |
| } |
| |
| /* |
| @return |
| MD5-Hash of the file or FALSE is calculation/adding |
| was not successful. |
| */ |
| public function addFile($file) { |
| if (!file_exists($file)) return false; |
| // if (!is_readable($file)) return false; |
| // if (basename($file) == '') return false; |
| // if (basename($file) == '.') return false; |
| // if (basename($file) == '..') return false; |
| self::makeFilenameConsistently($file); |
| $file_md5 = md5_file($file); |
| if ($file_md5 === false) return false; // Error... |
| $this->hashes[$file_md5][] = $file; |
| return $file_md5; |
| } |
| |
| public function clear() { |
| $this->hashes = array(); |
| } |
| |
| private function getDirectoryContext() { |
| if (count($this->hashes) == 0) return ''; |
| $directory_context = ''; |
| // Sort md5 hashes ascending (so that the result is equal at every machine) |
| ksort($this->hashes); |
| foreach ($this->hashes as $hash => $filenames) { |
| // Sort filenames ascending (so that the result is equal at every machine) |
| sort($filenames); |
| $directory_context .= $hash; |
| foreach ($filenames as $filename) { |
| $directory_context .= '*'.$filename; |
| } |
| $directory_context .= '|'; |
| } |
| $directory_context = substr($directory_context, 0, strlen($directory_context)-1); |
| return $directory_context; |
| } |
| |
| public function calculateDirectoryHash() { |
| $directory_context = $this->getDirectoryContext(); |
| return sha1($directory_context); |
| } |
| |
| function getVersionDescription() { |
| return 'Marschall V3'; |
| } |
| } |
| |
| ?> |