vendor/swiftmailer/lib/classes/Swift/CharacterReader/GenericFixedWidthReader.php
changeset 0 7f95f8617b0b
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/swiftmailer/lib/classes/Swift/CharacterReader/GenericFixedWidthReader.php	Sat Sep 24 15:40:41 2011 +0200
@@ -0,0 +1,95 @@
+<?php
+
+/*
+ * This file is part of SwiftMailer.
+ * (c) 2004-2009 Chris Corbyn
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+
+/**
+ * Provides fixed-width byte sizes for reading fixed-width character sets.
+ * @package Swift
+ * @subpackage Encoder
+ * @author Chris Corbyn
+ * @author Xavier De Cock <xdecock@gmail.com>
+ */
+class Swift_CharacterReader_GenericFixedWidthReader
+  implements Swift_CharacterReader
+{
+   
+  /**
+   * The number of bytes in a single character.
+   * @var int
+   * @access private
+   */
+  private $_width;
+	
+  /**
+   * Creates a new GenericFixedWidthReader using $width bytes per character.
+   * @param int $width
+   */
+  public function __construct($width)
+  {
+    $this->_width = $width;
+  }
+
+  /**
+   * Returns the complete charactermap
+   *
+   * @param string $string
+   * @param int $startOffset
+   * @param array $currentMap
+   * @param mixed $ignoredChars
+   * @return $int
+   */
+  public function getCharPositions($string, $startOffset, &$currentMap, &$ignoredChars)
+  {
+  	$strlen = strlen($string);
+  	// % and / are CPU intensive, so, maybe find a better way
+  	$ignored = $strlen%$this->_width;
+  	$ignoredChars = substr($string, - $ignored);
+  	$currentMap = $this->_width;
+  	return ($strlen - $ignored)/$this->_width;
+  	
+  }
+  
+  /**
+   * Returns mapType
+   * @int mapType
+   */
+  public function getMapType()
+  {
+  	return self::MAP_TYPE_FIXED_LEN;
+  }
+
+  /**
+   * Returns an integer which specifies how many more bytes to read.
+   * A positive integer indicates the number of more bytes to fetch before invoking
+   * this method again.
+   * A value of zero means this is already a valid character.
+   * A value of -1 means this cannot possibly be a valid character.
+   * @param string $bytes
+   * @return int
+   */
+  public function validateByteSequence($bytes, $size)
+  {
+    $needed = $this->_width - $size;
+    return ($needed > -1)
+      ? $needed
+      : -1
+      ;
+  }
+
+  /**
+   * Returns the number of bytes which should be read to start each character.
+   * @return int
+   */
+  public function getInitialByteSize()
+  {
+    return $this->_width;
+  }
+
+}