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diff --git a/vendor/swiftmailer/swiftmailer/lib/classes/Swift/CharacterReader.php b/vendor/swiftmailer/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.
+ *
+ * @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 character map.
+ *
+ * @param string $string
+ * @param int $startOffset
+ * @param array $currentMap
+ * @param mixed $ignoredChars
+ *
+ * @return int
+ */
+ public function getCharPositions($string, $startOffset, &$currentMap, &$ignoredChars);
+
+ /**
+ * Returns the mapType, see constants.
+ *
+ * @return int
+ */
+ 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
+ * @param int $size
+ *
+ * @return int
+ */
+ public function validateByteSequence($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();
+}