*/
const SEPARATOR_GAP_LENGTH = 0x03;
+ /**
+ * Minimum block length
+ */
+ private static $minimumBlockLength = 0;
+
/**
* Protected constructor
*
* Reads the file header
*
* @return void
- * @throws UnexpectedValueException If header length is invalid
+ * @throws UnexpectedValueException If header length or count of elements is invalid
*/
public function readFileHeader () {
// First rewind to beginning as the header sits at the beginning ...
$data = $this->getIteratorInstance()->read($this->getIteratorInstance()->getHeaderSize());
// Have all requested bytes been read?
- /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('Read %d bytes (%d wanted).', strlen($data), $this->getIteratorInstance()->getHeaderSize()));
+ /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('BASE-INDEX: Read %d bytes (%d wanted).', strlen($data), $this->getIteratorInstance()->getHeaderSize()));
if (strlen($data) != $this->getIteratorInstance()->getHeaderSize()) {
// Invalid header length
throw new UnexpectedValueException(sprintf('data(%d)=%s is not expected length %d',
*/
$header = explode(chr(BaseBinaryFile::SEPARATOR_HEADER_DATA), $data);
- // Set it here
- $this->getIteratorInstance()->setHeader($header);
-
// Check if the array has only 3 elements
- /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('header(%d)=%s', count($header), print_r($header, true)));
- assert(count($header) == 2);
-
- // Check magic
- assert($header[0] == self::INDEX_MAGIC);
-
- // Check length of count
- assert(strlen($header[1]) == BaseBinaryFile::LENGTH_COUNT);
+ /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('BASE-INDEX: header()=%d', count($header)));
+ //* PRINTR-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('BASE-INDEX: header(%d)=%s', count($header), print_r($header, true)));
+ if (count($header) != 2) {
+ // Bad header
+ throw new UnexpectedValueException(sprintf('header()=%d is not expected value 2', count($header)));
+ } elseif ($header[0] !== self::INDEX_MAGIC) {
+ // Magic must be in first element
+ throw new UnexpectedValueException(sprintf('header[0]=%s is not the expected magic (%s)', $header[0], self::INDEX_MAGIC));
+ } elseif (strlen($header[1]) != BaseBinaryFile::LENGTH_COUNT) {
+ // Length of total entries not matching
+ throw new UnexpectedValueException(sprintf('header[1](%d)=%s does not have expected length %d', strlen($header[1]), $header[1], BaseBinaryFile::LENGTH_COUNT));
+ }
// Decode count
$header[1] = hex2bin($header[1]);
+ // Set it here
+ $this->getIteratorInstance()->setHeader($header);
+
// Trace message
/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-INDEX: EXIT!');
}
*/
protected function initIndex (SplFileInfo $fileInfoInstance) {
// Get a file i/o pointer instance for index file
- /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('fileInfoInstance=%s - CALLED!', $fileInfoInstance));
+ /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('BASE-INDEX: fileInfoInstance[%s]=%s - CALLED!', get_class($fileInfoInstance), $fileInfoInstance));
$fileInstance = ObjectFactory::createObjectByConfiguredName('index_file_class', array($fileInfoInstance, $this));
// Get iterator instance
* @return $length Minimum length for one entry/block
*/
public function calculateMinimumBlockLength () {
- // Calulcate it
+ // Is it "cached"?
/* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput('BASE-INDEX: CALLED!');
- $length = BaseBinaryFile::LENGTH_TYPE + strlen(chr(BaseBinaryFile::SEPARATOR_TYPE_POSITION)) + BaseBinaryFile::LENGTH_POSITION + strlen(chr(BaseBinaryFile::SEPARATOR_ENTRIES));
+ if (self::$minimumBlockLength == 0) {
+ // Calulcate it
+ self::$minimumBlockLength = (
+ // Type
+ BaseBinaryFile::LENGTH_TYPE + strlen(chr(BaseBinaryFile::SEPARATOR_TYPE_POSITION)) +
+ // Position
+ BaseBinaryFile::LENGTH_POSITION + strlen(chr(BaseBinaryFile::SEPARATOR_ENTRIES))
+ );
+ }
// Return it
- /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('BASE-INDEX: length=%d - EXIT!', $length));
- return $length;
+ /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__, __LINE__)->debugOutput(sprintf('BASE-INDEX: self::minimumBlockLength=%d - EXIT!', self::$minimumBlockLength));
+ return self::$minimumBlockLength;
}
/**