inc/classes/main/file_directories/class_BaseFileIo.php

   1 <?php
   2 /**
   3  * A general FileIo class
   4  *
   5  * @author              Roland Haeder <webmaster@ship-simu.org>
   6  * @version             0.0.0
   7  * @copyright   Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2012 Core Developer Team
   8  * @license             GNU GPL 3.0 or any newer version
   9  * @link                http://www.ship-simu.org
  10  *
  11  * This program is free software: you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation, either version 3 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23  */
  24 class BaseFileIo extends BaseFrameworkSystem {
  25         /**
  26          * The current file we are working in
  27          */
  28         private $fileName = '';
  29
  30         /**
  31          * The file pointer
  32          */
  33         private $filePointer = NULL;
  34
  35         /**
  36          * Protected constructor
  37          *
  38          * @param       $className      Name of the class
  39          * @return      void
  40          */
  41         protected function __construct ($className) {
  42                 // Call parent constructor
  43                 parent::__construct($className);
  44         }
  45
  46         /**
  47          * Destructor for cleaning purposes, etc
  48          *
  49          * @return      void
  50          */
  51         public final function __destruct() {
  52                 // Is there a resource pointer? Then we have to close the file here!
  53                 if (is_resource($this->getPointer())) {
  54                         // Try to close a file
  55                         $this->closeFile();
  56                 } // END - if
  57
  58                 // Call the parent destructor
  59                 parent::__destruct();
  60         }
  61
  62         /**
  63          * Close a file source and set it's instance to null and the file name
  64          * to empty
  65          *
  66          * @return      void
  67          * @throws      NullPointerException    If the file pointer instance
  68          *                                                                      is not set by setPointer()
  69          * @throws      InvalidResourceException        If there is being set
  70          */
  71         public function closeFile () {
  72                 if (is_null($this->getPointer())) {
  73                         // Pointer not initialized
  74                         throw new NullPointerException($this, self::EXCEPTION_IS_NULL_POINTER);
  75                 } elseif (!is_resource($this->getPointer())) {
  76                         // Pointer is not a valid resource!
  77                         throw new InvalidResourceException($this, self::EXCEPTION_INVALID_RESOURCE);
  78                 }
  79
  80                 // Close the file pointer and reset the instance variable
  81                 @fclose($this->getPointer());
  82                 $this->setPointer(NULL);
  83                 $this->setFileName('');
  84         }
  85
  86         /**
  87          * Setter for the file pointer
  88          *
  89          * @param       $filePointer    File resource
  90          * @return      void
  91          */
  92         public final function setPointer ($filePointer) {
  93                 $this->filePointer = $filePointer;
  94         }
  95
  96         /**
  97          * Getter for the file pointer
  98          *
  99          * @return      $filePointer    The file pointer which shall be a valid
 100          *                                                      file resource
 101          */
 102         public final function getPointer () {
 103                 return $this->filePointer;
 104         }
 105
 106         /**
 107          * Setter for file name
 108          *
 109          * @param       $fileName       The new file name
 110          * @return      void
 111          */
 112         public final function setFileName ($fileName) {
 113                 $fileName = (string) $fileName;
 114                 $this->fileName = $fileName;
 115         }
 116
 117         /**
 118          * Getter for file name
 119          *
 120          * @return      $fileName       The current file name
 121          */
 122         public final function getFileName () {
 123                 return $this->fileName;
 124         }
 125
 126         /**
 127          * "Getter" for seek position
 128          *
 129          * @return      $seekPosition   Current seek position
 130          */
 131         public final function getSeekPosition () {
 132                 return ftell($this->getPointer());
 133         }
 134
 135         /**
 136          * Seek to given offset (default) or other possibilities as fseek() gives.
 137          *
 138          * @param       $offset         Offset to seek to (or used as "base" for other seeks)
 139          * @param       $whence         Added to offset (default: only use offset to seek to)
 140          * @return      $status         Status of file seek: 0 = success, -1 = failed
 141          */
 142         public function seek ($offset, $whence = SEEK_SET) {
 143                 // Seek to position
 144                 $status = fseek($this->getPointer(), $offset, $whence);
 145
 146                 // Return status
 147                 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] status=%s', __METHOD__, __LINE__, $status));
 148                 return $status;
 149         }
 150
 151         /**
 152          * Size of this file
 153          *
 154          * @return      $size   Size (in bytes) of file
 155          */
 156         public function size () {
 157                 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] CALLED!', __METHOD__, __LINE__));
 158
 159                 // Get current seek position
 160                 $seekPosition = $this->getSeekPosition();
 161
 162                 // Seek to end
 163                 $seekStatus = $this->seek(0, SEEK_END);
 164                 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] seekStatus=%s', __METHOD__, __LINE__, $seekStatus));
 165
 166                 // Get position again  (which is the end of the file)
 167                 $size = $this->getSeekPosition();
 168
 169                 // Reset seek position to old
 170                 $this->seek($seekPosition);
 171
 172                 // Return size
 173                 /* NOISY-DEBUG: */ self::createDebugInstance(__CLASS__)->debugOutput(sprintf('[%s:%d:] size=%s - EXIT!', __METHOD__, __LINE__, $size));
 174                 return $size;
 175         }
 176 }
 177
 178 // [EOF]
 179 ?>