--- /dev/null
+<?php
+/**
+ * A class for reading text files
+ *
+ * @author Roland Haeder <webmaster@shipsimu.org>
+ * @version 0.0.0
+ * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2014 Core Developer Team
+ * @license GNU GPL 3.0 or any newer version
+ * @link http://www.shipsimu.org
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+class FrameworkTextFileInputPointer extends BaseFileIo implements InputPointer {
+ /**
+ * Protected constructor
+ *
+ * @return void
+ */
+ protected function __construct () {
+ // Call parent constructor
+ parent::__construct(__CLASS__);
+ }
+
+ /**
+ * Create a file pointer based on the given file. The file will also
+ * be verified here.
+ *
+ * @param $fileName The file name we shall pass to fopen()
+ * @throws FileIsEmptyException If the provided file name is empty.
+ * @throws FileIoException If fopen() returns not a file resource
+ * @return void
+ */
+ public static final function createFrameworkTextFileInputPointer ($fileName) {
+ // Some pre-sanity checks...
+ if ((is_null($fileName)) || (empty($fileName))) {
+ // No filename given
+ throw new FileIsEmptyException(NULL, self::EXCEPTION_UNEXPECTED_EMPTY_STRING);
+ } elseif (!file_exists($fileName)) {
+ // File does not exist!
+ throw new FileIoException($fileName, self::EXCEPTION_FILE_NOT_FOUND);
+ } elseif (!is_readable($fileName)) {
+ // File does not exist!
+ throw new FileReadProtectedException($fileName, self::EXCEPTION_FILE_CANNOT_BE_READ);
+ }
+
+ // Try to open a handler
+ $filePointer = fopen($fileName, 'r');
+ if ((is_null($filePointer)) || ($filePointer === FALSE)) {
+ // Something bad happend
+ throw new FileIoException($fileName, self::EXCEPTION_FILE_POINTER_INVALID);
+ } // END - if
+
+ // Create new instance
+ $pointerInstance = new FrameworkTextFileInputPointer();
+
+ // Set file pointer and file name
+ $pointerInstance->setPointer($filePointer);
+ $pointerInstance->setFileName($fileName);
+
+ // Return the instance
+ return $pointerInstance;
+ }
+
+ /**
+ * Read data a file pointer
+ *
+ * @return mixed The result of fread()
+ * @throws NullPointerException If the file pointer instance
+ * is not set by setPointer()
+ * @throws InvalidResourceException If there is being set
+ */
+ public function readFromFile () {
+ if (is_null($this->getPointer())) {
+ // Pointer not initialized
+ throw new NullPointerException($this, self::EXCEPTION_IS_NULL_POINTER);
+ } elseif (!is_resource($this->getPointer())) {
+ // Pointer is not a valid resource!
+ throw new InvalidResourceException($this, self::EXCEPTION_INVALID_RESOURCE);
+ }
+
+ // Read data from the file pointer and return it
+ return $this->read(1024);
+ }
+
+ /**
+ * Reads given amount of bytes from file.
+ *
+ * @param $bytes Amount of bytes to read
+ * @return $data Data read from file
+ */
+ public function read ($bytes) {
+ // Try to read given characters
+ $data = fgets($this->getPointer(), $bytes);
+
+ // Was this successfull?
+ assert(is_string($data));
+
+ // Then return it
+ return $data;
+ }
+
+ /**
+ * Analyzes entries in index file. This will count all found (and valid)
+ * entries, mark invalid as damaged and count gaps ("fragmentation"). If
+ * only gaps are found, the file is considered as "virgin" (no entries).
+ *
+ * @return void
+ * @throws UnsupportedOperationException If this method is called
+ */
+ public function analyzeFile () {
+ throw new UnsupportedOperationException(array($this, __FUNCTION__), self::EXCEPTION_UNSPPORTED_OPERATION);
+ }
+
+ /**
+ * Advances to next "block" of bytes
+ *
+ * @return void
+ * @throws UnsupportedOperationException If this method is called
+ */
+ public function next () {
+ throw new UnsupportedOperationException(array($this, __FUNCTION__), self::EXCEPTION_UNSPPORTED_OPERATION);
+ }
+
+ /**
+ * Checks wether the current entry is valid (not at the end of the file).
+ * This method will return TRUE if an emptied (nulled) entry has been found.
+ *
+ * @return $isValid Whether the next entry is valid
+ * @throws UnsupportedOperationException If this method is called
+ */
+ public function valid () {
+ throw new UnsupportedOperationException(array($this, __FUNCTION__), self::EXCEPTION_UNSPPORTED_OPERATION);
+ }
+
+ /**
+ * Gets current seek position ("key").
+ *
+ * @return $key Current key in iteration
+ * @throws UnsupportedOperationException If this method is called
+ */
+ public function key () {
+ throw new UnsupportedOperationException(array($this, __FUNCTION__), self::EXCEPTION_UNSPPORTED_OPERATION);
+ }
+}
+
+// [EOF]
+?>
projects / core.git / blobdiff