X-Git-Url: https://git.mxchange.org/?p=core.git;a=blobdiff_plain;f=inc%2Fclasses%2Fmain%2Fstacker%2Ffile%2Fclass_BaseFileStack.php;h=9219ecc3d132f4458e9e2fe79da64e37642e429b;hp=203655d95b3c3c07a8fb37064eb81ec9d674ba2c;hb=55a804571db8f1fade4c0cd3149ea847a3a7002d;hpb=9d660b840e51d029876127c405de2aae2757b4d3

diff --git a/inc/classes/main/stacker/file/class_BaseFileStack.php b/inc/classes/main/stacker/file/class_BaseFileStack.php
index 203655d9..9219ecc3 100644
--- a/inc/classes/main/stacker/file/class_BaseFileStack.php
+++ b/inc/classes/main/stacker/file/class_BaseFileStack.php
@@ -27,56 +27,6 @@ class BaseFileStack extends BaseStacker {
 	 */
 	const STACK_MAGIC = 'STACKv0.1';
 
-	/**
-	 * Separator for header data
-	 */
-	const SEPARATOR_HEADER_DATA = 0x01;
-
-	/**
-	 * Separator header->entries
-	 */
-	const SEPARATOR_HEADER_ENTRIES = 0x02;
-
-	/**
-	 * Separator hash->name
-	 */
-	const SEPARATOR_HASH_NAME = 0x03;
-
-	/**
-	 * Length of name
-	 */
-	const LENGTH_NAME = 10;
-
-	/**
-	 * Length of count
-	 */
-	const LENGTH_COUNT = 20;
-
-	/**
-	 * Length of position
-	 */
-	const LENGTH_POSITION = 20;
-
-	/**
-	 * Counter for total entries
-	 */
-	private $totalEntries = 0;
-
-	/**
-	 * Current seek position
-	 */
-	private $seekPosition = 0;
-
-	/**
-	 * Size of header
-	 */
-	private $headerSize = 0;
-
-	/**
-	 * File header
-	 */
-	private $header = array();
-
 	/**
 	 * Protected constructor
 	 *
@@ -88,7 +38,7 @@ class BaseFileStack extends BaseStacker {
 		parent::__construct($className);
 
 		// Calculate header size
-		$this->headerSize = (
+		$this->setHeaderSize(
 			strlen(self::STACK_MAGIC) +
 			strlen(self::SEPARATOR_HEADER_DATA) +
 			self::LENGTH_COUNT +
@@ -96,84 +46,29 @@ class BaseFileStack extends BaseStacker {
 			self::LENGTH_POSITION +
 			strlen(self::SEPARATOR_HEADER_ENTRIES)
 		);
-	}
 
-	/**
-	 * Getter for total entries
-	 *
-	 * @return	$totalEntries	Total entries in this stack
-	 */
-	private function getCounter () {
-		// Get it
-		return $this->totalEntries;
-	}
-
-	/**
-	 * Increment counter
-	 *
-	 * @return	void
-	 */
-	private function incrementCounter () {
-		// Get it
-		$this->totalEntries++;
-	}
-
-	/**
-	 * Getter for seek position
-	 *
-	 * @return	$seekPosition	Current seek position (stored here in object)
-	 */
-	private function getSeekPosition () {
-		// Get it
-		return $this->seekPosition;
-	}
-
-	/**
-	 * Setter for seek position
-	 *
-	 * @param	$seekPosition	Current seek position (stored here in object)
-	 * @return	void
-	 */
-	private function setSeekPosition ($seekPosition) {
-		// And set it
-		$this->seekPosition = $seekPosition;
-	}
-
-	/**
-	 * Updates seekPosition attribute from file to avoid to much access on file.
-	 *
-	 * @return	void
-	 */
-	private function updateSeekPosition () {
-		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] CALLED!', __METHOD__, __LINE__));
-
-		// Get key (= seek position)
-		$seekPosition = $this->getIteratorInstance()->key();
-		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] Setting seekPosition=%s', __METHOD__, __LINE__, $seekPosition));
-
-		// And set it here
-		$this->setSeekPosition($seekPosition);
-
-		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] EXIT!', __METHOD__, __LINE__));
+		// Init counters and gaps array
+		$this->initCountersGapsArray();
 	}
 
 	/**
 	 * Reads the file header
 	 *
 	 * @return	void
+	 * @todo	To hard assertions here, better rewrite them to exceptions
 	 */
-	private function readFileHeader () {
+	protected function readFileHeader () {
 		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] CALLED!', __METHOD__, __LINE__));
 
 		// First rewind to beginning as the header sits at the beginning ...
 		$this->getIteratorInstance()->rewind();
 
 		// Then read it (see constructor for calculation)
-		$data = $this->getIteratorInstance()->read($this->headerSize);
-		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] Read %d bytes (%d wanted).', __METHOD__, __LINE__, strlen($data), $this->headerSize));
+		$data = $this->getIteratorInstance()->read($this->getHeaderSize());
+		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] Read %d bytes (%d wanted).', __METHOD__, __LINE__, strlen($data), $this->getHeaderSize()));
 
 		// Have all requested bytes been read?
-		assert(strlen($data) == $this->headerSize);
+		assert(strlen($data) == $this->getHeaderSize());
 		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] Passed assert().', __METHOD__, __LINE__));
 
 		// Last character must be the separator
@@ -190,116 +85,43 @@ class BaseFileStack extends BaseStacker {
 		/*
 		 * Now split it:
 		 *
-		 * 0 => Magic
-		 * 1 => Total entries
-		 * 2 => Current seek position
+		 * 0 => magic
+		 * 1 => total entries
+		 * 2 => current seek position
 		 */
-		$this->header = explode(chr(self::SEPARATOR_HEADER_DATA), $data);
+		$header = explode(chr(self::SEPARATOR_HEADER_DATA), $data);
+
+		// Set header here
+		$this->setHeader($header);
 
 		// Check if the array has only 3 elements
-		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] header(%d)=%s', __METHOD__, __LINE__, count($this->header), print_r($this->header, TRUE)));
-		assert(count($this->header) == 3);
+		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] header(%d)=%s', __METHOD__, __LINE__, count($header), print_r($header, TRUE)));
+		assert(count($header) == 3);
 		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] Passed assert().', __METHOD__, __LINE__));
 
 		// Check magic
-		assert($this->header[0] == self::STACK_MAGIC);
+		assert($header[0] == self::STACK_MAGIC);
 		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] Passed assert().', __METHOD__, __LINE__));
 
 		// Check length of count and seek position
-		assert(strlen($this->header[1]) == self::LENGTH_COUNT);
+		assert(strlen($header[1]) == self::LENGTH_COUNT);
 		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] Passed assert().', __METHOD__, __LINE__));
-		assert(strlen($this->header[2]) == self::LENGTH_POSITION);
+		assert(strlen($header[2]) == self::LENGTH_POSITION);
 		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] Passed assert().', __METHOD__, __LINE__));
 
 		// Decode count and seek position
-		$this->header[1] = hex2bin($this->header[1]);
-		$this->header[2] = hex2bin($this->header[2]);
+		$header[1] = hex2bin($header[1]);
+		$header[2] = hex2bin($header[2]);
 
 		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] EXIT!', __METHOD__, __LINE__));
 	}
 
-	/**
-	 * Checks whether the file header is initialized
-	 *
-	 * @return	$isInitialized	Whether the file header is initialized
-	 */
-	private function isFileHeaderInitialized () {
-		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] CALLED!', __METHOD__, __LINE__));
-		// Default is not initialized
-		$isInitialized = FALSE;
-
-		// Is the file initialized?
-		if ($this->isFileInitialized()) {
-			// Some bytes has been written, so rewind to start of it.
-			$rewindStatus = $this->getIteratorInstance()->rewind();
-			//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] rewindStatus=%s', __METHOD__, __LINE__, $rewindStatus));
-
-			// Is the rewind() call successfull?
-			if ($rewindStatus != 1) {
-				// Something bad happened
-				self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] Could not rewind().', __METHOD__, __LINE__));
-			} // END - if
-
-			// Read file header
-			$this->readFileHeader();
-
-			// The above method does already check the header
-			$isInitialized = TRUE;
-		} // END - if
-
-		// Return result
-		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] isInitialized=%d - EXIT!', __METHOD__, __LINE__, intval($isInitialized)));
-		return $isInitialized;
-	}
-
-	/**
-	 * Checks whether the file-based stack has been initialized
-	 *
-	 * @return	$isInitialized		Whether the file's size is zero
-	 */
-	private function isFileInitialized () {
-		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] CALLED!', __METHOD__, __LINE__));
-
-		// Get it from iterator which holds the pointer instance. If FALSE is returned
-		$fileSize = $this->getIteratorInstance()->size();
-		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] fileSize=%s', __METHOD__, __LINE__, $fileSize));
-
-		/*
-		 * The returned file size should not be FALSE or NULL as this means
-		 * that the pointer class does not work correctly.
-		 */
-		assert(is_int($fileSize));
-
-		// Is more than 0 returned?
-		$isInitialized = ($fileSize > 0);
-
-		// Return result
-		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] isInitialized=%d - EXIT!', __METHOD__, __LINE__, intval($isInitialized)));
-		return $isInitialized;
-	}
-
-	/**
-	 * Creates the file-stack's header
-	 *
-	 * @return	void
-	 */
-	private function createFileHeader () {
-		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] CALLED!', __METHOD__, __LINE__));
-		// The file's header should not be initialized here
-		assert(!$this->isFileHeaderInitialized());
-
-		// Simple flush file header which will create it.
-		$this->flushFileHeader();
-
-		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] EXIT!!', __METHOD__, __LINE__));
-	}
-
 	/**
 	 * Flushes the file header
 	 *
 	 * @return	void
 	 */
-	private function flushFileHeader () {
+	protected function flushFileHeader () {
 		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] CALLED!', __METHOD__, __LINE__));
 
 		// Put all informations together
@@ -324,63 +146,7 @@ class BaseFileStack extends BaseStacker {
 		);
 
 		// Write it to disk (header is always at seek position 0)
-		$this->writeData(0, $header);
-
-		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] EXIT!', __METHOD__, __LINE__));
-	}
-
-	/**
-	 * Writes data at given position
-	 *
-	 * @param	$seekPosition	Seek position
-	 * @param	$data			Data to be written
-	 * @return	void
-	 */
-	private function writeData ($seekPosition, $data) {
-		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] seekPosition=%s,data()=%s - CALLED!', __METHOD__, __LINE__, $seekPosition, strlen($data)));
-
-		// Write data at given position
-		$this->getIteratorInstance()->writeAtPosition($seekPosition, $data);
-
-		// Update seek position
-		$this->updateSeekPosition();
-
-		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] EXIT!', __METHOD__, __LINE__));
-	}
-
-	/**
-	 * Pre-allocates file (if enabled) with some space for later faster write access.
-	 *
-	 * @return	void
-	 */
-	private function preAllocateFile () {
-		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] CALLED!', __METHOD__, __LINE__));
-
-		// Is it enabled?
-		if ($this->getConfigInstance()->getConfigEntry('file_stack_pre_allocate_enabled') != 'Y') {
-			// Not enabled
-			self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] Not pre-allocating stack file.', __METHOD__, __LINE__));
-
-			// Don't continue here.
-			return;
-		} // END - if
-
-		// Message to user
-		self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] Pre-allocating stack file ...', __METHOD__, __LINE__));
-
-		/*
-		 * Calculate minimum length for one entry:
-		 * minimum length = hash length + separator + name + minimum entry size = ?? + 1 + 10 + 1 = ??
-		 */
-		$minLengthEntry = self::getHashLength() + strlen(self::SEPARATOR_HASH_NAME) + self::LENGTH_NAME + 1;
-		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] minLengthEntry=%s', __METHOD__, __LINE__, $minLengthEntry));
-
-		// Calulcate seek position
-		$seekPosition = $minLengthEntry * $this->getConfigInstance()->getConfigEntry('file_stack_pre_allocate_count');
-		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] seekPosition=%s', __METHOD__, __LINE__, $seekPosition));
-
-		// Now simply write a NUL there. This will pre-allocate the file.
-		$this->writeData($seekPosition, chr(0));
+		$this->writeData(0, $header, FALSE);
 
 		//* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] EXIT!', __METHOD__, __LINE__));
 	}
@@ -389,14 +155,16 @@ class BaseFileStack extends BaseStacker {
 	 * Initializes this file-based stack.
 	 *
 	 * @param	$fileName	File name of this stack
+	 * @param	$type		Type of this stack (e.g. url_source for URL sources)
 	 * @return	void
+	 * @todo	Currently the stack file is not cached, please implement a memory-handling class and if enough RAM is found, cache the whole stack file.
 	 */
-	protected function initFileStack ($fileName) {
-		// Get a file i/o pointer instance
-		$pointerInstance = ObjectFactory::createObjectByConfiguredName('file_raw_input_output_class', array($fileName));
+	protected function initFileStack ($fileName, $type) {
+		// Get a stack file instance
+		$fileInstance = ObjectFactory::createObjectByConfiguredName('stack_file_class', array($fileName, $this));
 
 		// Get iterator instance
-		$iteratorInstance = ObjectFactory::createObjectByConfiguredName('file_io_iterator_class', array($pointerInstance));
+		$iteratorInstance = ObjectFactory::createObjectByConfiguredName('file_io_iterator_class', array($fileInstance));
 
 		// Is the instance implementing the right interface?
 		assert($iteratorInstance instanceof SeekableWritableFileIterator);
@@ -410,11 +178,23 @@ class BaseFileStack extends BaseStacker {
 			$this->createFileHeader();
 
 			// And pre-allocate a bit
-			$this->preAllocateFile();
+			$this->preAllocateFile('file_stack');
 		} // END - if
 
 		// Load the file header
 		$this->readFileHeader();
+
+		// Count all entries in file
+		$this->getIteratorInstance()->analyzeFile();
+
+		/*
+		 * Get stack index instance. This can be used for faster
+		 * "defragmentation" and startup.
+		 */
+		$indexInstance = FileStackIndexFactory::createFileStackIndexInstance($fileName, $type);
+
+		// And set it here
+		$this->setIndexInstance($indexInstance);
 	}
 
 	/**
@@ -423,12 +203,14 @@ class BaseFileStack extends BaseStacker {
 	 * @param	$stackerName	Name of the stack
 	 * @param	$value			Value to add to this stacker
 	 * @return	void
+	 * @throws	FullStackerException	If the stack is full
 	 */
 	protected function addValue ($stackerName, $value) {
-		} elseif ($this->isStackFull($stackerName)) {
+		// Do some tests
+		if ($this->isStackFull($stackerName)) {
 			// Stacker is full
 			throw new FullStackerException(array($this, $stackerName, $value), self::EXCEPTION_STACKER_IS_FULL);
-		}
+		} // END - if
 
 		// Now add the value to the stack
 		$this->partialStub('stackerName=' . $stackerName . ',value[]=' . gettype($value));
@@ -439,13 +221,14 @@ class BaseFileStack extends BaseStacker {
 	 *
 	 * @param	$stackerName	Name of the stack
 	 * @return	$value			Value of last added value
+	 * @throws	EmptyStackerException	If the stack is empty
 	 */
 	protected function getLastValue ($stackerName) {
 		// Is the stack not yet initialized or full?
-		} elseif ($this->isStackEmpty($stackerName)) {
+		if ($this->isStackEmpty($stackerName)) {
 			// Throw an exception
 			throw new EmptyStackerException(array($this, $stackerName), self::EXCEPTION_STACKER_IS_EMPTY);
-		}
+		} // END - if
 
 		// Now get the last value
 		$this->partialStub('stackerName=' . $stackerName);
@@ -460,13 +243,14 @@ class BaseFileStack extends BaseStacker {
 	 *
 	 * @param	$stackerName	Name of the stack
 	 * @return	$value			Value of last added value
+	 * @throws	EmptyStackerException	If the stack is empty
 	 */
 	protected function getFirstValue ($stackerName) {
 		// Is the stack not yet initialized or full?
-		} elseif ($this->isStackEmpty($stackerName)) {
+		if ($this->isStackEmpty($stackerName)) {
 			// Throw an exception
 			throw new EmptyStackerException(array($this, $stackerName), self::EXCEPTION_STACKER_IS_EMPTY);
-		}
+		} // END - if
 
 		// Now get the first value
 		$this->partialStub('stackerName=' . $stackerName);
@@ -481,13 +265,14 @@ class BaseFileStack extends BaseStacker {
 	 *
 	 * @param	$stackerName	Name of the stack
 	 * @return	$value			Value "poped" from array
+	 * @throws	EmptyStackerException	If the stack is empty
 	 */
 	protected function popLast ($stackerName) {
 		// Is the stack not yet initialized or full?
-		} elseif ($this->isStackEmpty($stackerName)) {
+		if ($this->isStackEmpty($stackerName)) {
 			// Throw an exception
 			throw new EmptyStackerException(array($this, $stackerName), self::EXCEPTION_STACKER_IS_EMPTY);
-		}
+		} // END - if
 
 		// Now, remove the last entry, we don't care about the return value here, see elseif() block above
 		$this->partialStub('stackerName=' . $stackerName);
@@ -499,21 +284,50 @@ class BaseFileStack extends BaseStacker {
 	 *
 	 * @param	$stackerName	Name of the stack
 	 * @return	$value			Value "shifted" from array
-	 * @throws	NoStackerException	If the named stacker was not found
 	 * @throws	EmptyStackerException	If the named stacker is empty
 	 */
 	protected function popFirst ($stackerName) {
 		// Is the stack not yet initialized or full?
-		} elseif ($this->isStackEmpty($stackerName)) {
+		if ($this->isStackEmpty($stackerName)) {
 			// Throw an exception
 			throw new EmptyStackerException(array($this, $stackerName), self::EXCEPTION_STACKER_IS_EMPTY);
-		}
+		} // END - if
 
 		// Now, remove the last entry, we don't care about the return value here, see elseif() block above
 		$this->partialStub('stackerName=' . $stackerName);
 		return NULL;
 	}
 
+	/**
+	 * Checks whether the given stack is full
+	 *
+	 * @param	$stackerName	Name of the stack
+	 * @return	$isFull			Whether the stack is full
+	 */
+	protected function isStackFull ($stackerName) {
+		// File-based stacks will only run full if the disk space is low.
+		// @TODO Please implement this, returning FALSE
+		$isFull = FALSE;
+
+		// Return result
+		return $isFull;
+	}
+
+	/**
+	 * Checks whether the given stack is empty
+	 *
+	 * @param	$stackerName		Name of the stack
+	 * @return	$isEmpty			Whether the stack is empty
+	 * @throws	NoStackerException	If given stack is missing
+	 */
+	public function isStackEmpty ($stackerName) {
+		// So, is the stack empty?
+		$isEmpty = (($this->getStackCount($stackerName)) == 0);
+
+		// Return result
+		return $isEmpty;
+	}
+
 	/**
 	 * Initializes given stacker
 	 *
@@ -523,7 +337,7 @@ class BaseFileStack extends BaseStacker {
 	 * @throws	UnsupportedOperationException	This method is not (and maybe never will be) supported
 	 */
 	public function initStack ($stackerName, $forceReInit = FALSE) {
-		throw new UnsupportedOperationException(array($this, __FUNCTION__, $executorInstance), self::EXCEPTION_UNSPPORTED_OPERATION);
+		throw new UnsupportedOperationException(array($this, __FUNCTION__, $this->getIteratorInstance()->getPointerInstance()), self::EXCEPTION_UNSPPORTED_OPERATION);
 	}
 
 	/**
@@ -533,7 +347,7 @@ class BaseFileStack extends BaseStacker {
 	 * @throws	UnsupportedOperationException	This method is not (and maybe never will be) supported
 	 */
 	public function initStacks (array $stacks, $forceReInit = FALSE) {
-		throw new UnsupportedOperationException(array($this, __FUNCTION__, $executorInstance), self::EXCEPTION_UNSPPORTED_OPERATION);
+		throw new UnsupportedOperationException(array($this, __FUNCTION__, $this->getIteratorInstance()->getPointerInstance()), self::EXCEPTION_UNSPPORTED_OPERATION);
 	}
 
 	/**
@@ -544,7 +358,7 @@ class BaseFileStack extends BaseStacker {
 	 * @throws	UnsupportedOperationException	This method is not (and maybe never will be) supported
 	 */
 	public function isStackInitialized ($stackerName) {
-		throw new UnsupportedOperationException(array($this, __FUNCTION__, $executorInstance), self::EXCEPTION_UNSPPORTED_OPERATION);
+		throw new UnsupportedOperationException(array($this, __FUNCTION__, $this->getIteratorInstance()->getPointerInstance()), self::EXCEPTION_UNSPPORTED_OPERATION);
 	}
 
 	/**
@@ -554,23 +368,21 @@ class BaseFileStack extends BaseStacker {
 	 * @return	$count			Size of stack (array count)
 	 */
 	public function getStackCount ($stackerName) {
-		// Now, count the array of entries
-		$this->partialStub('stackerName=' . $stackerName);
-		$count = 0;
-
-		// Return result
-		return $count;
+		// Now, simply return the found count value, this must be up-to-date then!
+		return $this->getCounter();
 	}
 
 	/**
-	 * Checks whether the given stack is empty
+	 * Calculates minimum length for one entry/block
 	 *
-	 * @param	$stackerName		Name of the stack
-	 * @return	$isEmpty			Whether the stack is empty
-	 * @throws	UnsupportedOperationException	This method is not (and maybe never will be) supported
+	 * @return	$length		Minimum length for one entry/block
 	 */
-	public final function isStackEmpty ($stackerName) {
-		throw new UnsupportedOperationException(array($this, __FUNCTION__, $executorInstance), self::EXCEPTION_UNSPPORTED_OPERATION);
+	public function caluclateMinimumBlockLength () {
+		// Calulcate it
+		$length = self::getHashLength() + strlen(chr(self::SEPARATOR_HASH_NAME)) + self::LENGTH_NAME + 1 + strlen(self::getBlockSeparator());
+
+		// Return it
+		return $length;
 	}
 }