X-Git-Url: https://git.mxchange.org/?p=core.git;a=blobdiff_plain;f=inc%2Fclasses%2Finterfaces%2Fiterator%2Fclass_SeekableWritableFileIterator.php;h=d5f7c19252de07bbe8764cda26b200114dab4019;hp=1dde2c27235b52e32bc25e46cbefa1959e56d10d;hb=1295e7ab888e4ac1b7c1b92af58943e5dc72207b;hpb=8557e30c478c289b89a8dc241eb55b838aead662

diff --git a/inc/classes/interfaces/iterator/class_SeekableWritableFileIterator.php b/inc/classes/interfaces/iterator/class_SeekableWritableFileIterator.php
index 1dde2c27..d5f7c192 100644
--- a/inc/classes/interfaces/iterator/class_SeekableWritableFileIterator.php
+++ b/inc/classes/interfaces/iterator/class_SeekableWritableFileIterator.php
@@ -39,13 +39,121 @@ interface SeekableWritableFileIterator extends SeekableIterator {
 	function size ();
 
 	/**
-	 * Writes at given position by seeking to it.
+	 * Reads given amount of bytes from file.
 	 *
-	 * @param	$seekPosition	Seek position in file
+	 * @param	$bytes	Amount of bytes to read
+	 * @return	$data	Data read from file
+	 */
+	function read ($bytes);
+
+	/**
+	 * Analyzes entries in index file. This will count all found (and valid)
+	 * entries, mark invalid as damaged and count gaps ("fragmentation"). If
+	 * only gaps are found, the file is considered as "virgin" (no entries).
+	 *
+	 * @return	void
+	 */
+	function analyzeFile ();
+
+	/**
+	 * Checks whether the file header is initialized
+	 *
+	 * @return	$isInitialized	Whether the file header is initialized
+	 */
+	function isFileHeaderInitialized ();
+
+	/**
+	 * Creates the assigned file
+	 *
+	 * @return	void
+	 */
+	function createFileHeader ();
+
+	/**
+	 * Pre-allocates file (if enabled) with some space for later faster write access.
+	 *
+	 * @param	$type	Type of the file
+	 * @return	void
+	 */
+	function preAllocateFile ($type);
+
+	/**
+	 * Initializes counter for valid entries, arrays for damaged entries and
+	 * an array for gap seek positions. If you call this method on your own,
+	 * please re-analyze the file structure. So you are better to call
+	 * analyzeFile() instead of this method.
+	 *
+	 * @return	void
+	 */
+	function initCountersGapsArray ();
+
+	/**
+	 * Getter for header size
+	 *
+	 * @return	$totalEntries	Size of file header
+	 */
+	function getHeaderSize ();
+
+	/**
+	 * Setter for header size
+	 *
+	 * @param	$headerSize		Size of file header
+	 * @return	void
+	 */
+	function setHeaderSize ($headerSize);
+
+	/**
+	 * Getter for header array
+	 *
+	 * @return	$totalEntries	Size of file header
+	 */
+	function getHeader ();
+
+	/**
+	 * Setter for header
+	 *
+	 * @param	$header		Array for a file header
+	 * @return	void
+	 */
+	function setHeader (array $header);
+
+	/**
+	 * Updates seekPosition attribute from file to avoid to much access on file.
+	 *
+	 * @return	void
+	 */
+	function updateSeekPosition ();
+
+	/**
+	 * Getter for total entries
+	 *
+	 * @return	$totalEntries	Total entries in this file
+	 */
+	function getCounter ();
+
+	/**
+	 * "Getter" for file size
+	 *
+	 * @return	$fileSize	Size of currently loaded file
+	 */
+	function getFileSize ();
+
+	/**
+	 * Writes data at given position
+	 *
+	 * @param	$seekPosition	Seek position
 	 * @param	$data			Data to be written
+	 * @param	$flushHeader	Whether to flush the header (default: flush)
 	 * @return	void
 	 */
-	function writeAtPosition ($seedPosition, $data);
+	function writeData ($seekPosition, $data, $flushHeader = TRUE);
+
+	/**
+	 * Getter for seek position
+	 *
+	 * @return	$seekPosition	Current seek position (stored here in object)
+	 */
+	function getSeekPosition ();
 }
 
 // [EOF]