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diff --git a/External/swiftmailer/lib/classes/Swift/CharacterReader.php b/External/swiftmailer/lib/classes/Swift/CharacterReader.php
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+++ b/External/swiftmailer/lib/classes/Swift/CharacterReader.php
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+<?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.
+ */
+
+/**
+ * Analyzes characters for a specific character set.
+ * @package Swift
+ * @subpackage Encoder
+ * @author Chris Corbyn
+ * @author Xavier De Cock <xdecock@gmail.com>
+ */
+interface Swift_CharacterReader
+{
+  const MAP_TYPE_INVALID = 0x01;
+  const MAP_TYPE_FIXED_LEN = 0x02;
+  const MAP_TYPE_POSITIONS = 0x03;
+  
+  /**
+   * 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);
+  
+  /**
+   * Returns mapType
+   * @int mapType
+   */
+  public function getMapType();
+  
+  /**
+   * 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 int[] $bytes
+   * @return int
+   */
+  public function validateByteSequence($bytes, $size);
+
+  /**
+   * Returns the number of bytes which should be read to start each character.
+   * For fixed width character sets this should be the number of
+   * octets-per-character. For multibyte character sets this will probably be 1.
+   * @return int
+   */
+  public function getInitialByteSize();
+
+}