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<?php |
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/* |
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* This file is part of SwiftMailer. |
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* (c) 2004-2009 Chris Corbyn |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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/** |
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* A CharacterStream implementation which stores characters in an internal array. |
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* |
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* @author Chris Corbyn |
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*/ |
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class Swift_CharacterStream_ArrayCharacterStream implements Swift_CharacterStream |
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{ |
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/** |
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* A map of byte values and their respective characters |
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* |
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* @var array |
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*/ |
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private static $_charMap; |
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/** |
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* A map of characters and their derivative byte values |
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* |
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* @var array |
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*/ |
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private static $_byteMap; |
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/** |
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* The char reader (lazy-loaded) for the current charset |
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* |
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* @var Swift_CharacterReader |
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*/ |
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private $_charReader; |
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/** |
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* A factory for creating CharacterReader instance |
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* |
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* @var Swift_CharacterReaderFactory |
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*/ |
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private $_charReaderFactory; |
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/** |
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* The character set this stream is using |
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* |
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* @var string |
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*/ |
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private $_charset; |
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/** |
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* Array of characters |
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* |
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* @var array |
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*/ |
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private $_array = array(); |
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/** |
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* Size of the array of character |
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* |
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* @var int |
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*/ |
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private $_array_size = 0; |
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/** |
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* The current character offset in the stream |
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* |
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* @var int |
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*/ |
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private $_offset = 0; |
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/** |
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* Create a new CharacterStream with the given $chars, if set. |
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* |
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* @param Swift_CharacterReaderFactory $factory for loading validators |
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* @param string $charset used in the stream |
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*/ |
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public function __construct(Swift_CharacterReaderFactory $factory, $charset) |
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{ |
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self::_initializeMaps(); |
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$this->setCharacterReaderFactory($factory); |
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$this->setCharacterSet($charset); |
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} |
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/** |
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* Set the character set used in this CharacterStream. |
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* |
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* @param string $charset |
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*/ |
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public function setCharacterSet($charset) |
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{ |
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$this->_charset = $charset; |
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$this->_charReader = null; |
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} |
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/** |
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* Set the CharacterReaderFactory for multi charset support. |
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* |
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* @param Swift_CharacterReaderFactory $factory |
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*/ |
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public function setCharacterReaderFactory(Swift_CharacterReaderFactory $factory) |
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{ |
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$this->_charReaderFactory = $factory; |
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} |
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/** |
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* Overwrite this character stream using the byte sequence in the byte stream. |
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* |
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* @param Swift_OutputByteStream $os output stream to read from |
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*/ |
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public function importByteStream(Swift_OutputByteStream $os) |
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{ |
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if (!isset($this->_charReader)) { |
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$this->_charReader = $this->_charReaderFactory->getReaderFor($this->_charset); |
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} |
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$startLength = $this->_charReader->getInitialByteSize(); |
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while (false !== $bytes = $os->read($startLength)) { |
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$c = array(); |
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$len = strlen($bytes); |
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for ($i = 0; $i < $len; ++$i) { |
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$c[] = self::$_byteMap[$bytes[$i]]; |
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} |
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$size = count($c); |
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$need = $this->_charReader->validateByteSequence($c, $size); |
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if ($need > 0) { |
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$bytes = $os->read($need); |
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if (false !== $bytes) { |
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$len = strlen($bytes); |
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for ($i = 0; $i < $len; ++$i) { |
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$c[] = self::$_byteMap[$bytes[$i]]; |
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} |
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} |
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} |
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$this->_array[] = $c; |
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++$this->_array_size; |
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} |
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} |
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/** |
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* Import a string a bytes into this CharacterStream, overwriting any existing |
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* data in the stream. |
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* |
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* @param string $string |
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*/ |
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public function importString($string) |
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{ |
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$this->flushContents(); |
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$this->write($string); |
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} |
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/** |
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* Read $length characters from the stream and move the internal pointer |
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* $length further into the stream. |
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* |
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* @param int $length |
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* |
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* @return false|string false on error |
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*/ |
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public function read($length) |
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{ |
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if ($this->_offset === $this->_array_size) { |
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return false; |
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} |
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// Don't use array slice |
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$arrays = array(); |
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$end = $length + $this->_offset; |
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for ($i = $this->_offset; $i < $end; ++$i) { |
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if (!isset($this->_array[$i])) { |
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break; |
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} |
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$arrays[] = $this->_array[$i]; |
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} |
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$this->_offset += $i - $this->_offset; // Limit function calls |
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$chars = false; |
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foreach ($arrays as $array) { |
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$chars .= implode('', array_map('chr', $array)); |
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} |
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return $chars; |
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} |
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/** |
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* Read $length characters from the stream and return a 1-dimensional array |
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* containing there octet values. |
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* |
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* @param int $length |
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* |
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* @return integer[] |
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*/ |
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public function readBytes($length) |
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{ |
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if ($this->_offset === $this->_array_size) { |
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return false; |
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} |
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$arrays = array(); |
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$end = $length + $this->_offset; |
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for ($i = $this->_offset; $i < $end; ++$i) { |
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if (!isset($this->_array[$i])) { |
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break; |
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} |
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$arrays[] = $this->_array[$i]; |
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} |
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$this->_offset += ($i - $this->_offset); // Limit function calls |
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return call_user_func_array('array_merge', $arrays); |
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} |
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/** |
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* Write $chars to the end of the stream. |
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* |
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* @param string $chars |
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*/ |
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public function write($chars) |
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{ |
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if (!isset($this->_charReader)) { |
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$this->_charReader = $this->_charReaderFactory->getReaderFor($this->_charset); |
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} |
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$startLength = $this->_charReader->getInitialByteSize(); |
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$fp = fopen('php://memory', 'w+b'); |
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fwrite($fp, $chars); |
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unset($chars); |
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fseek($fp, 0, SEEK_SET); |
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$buffer = array(0); |
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$buf_pos = 1; |
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$buf_len = 1; |
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$has_data = true; |
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do { |
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$bytes = array(); |
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// Buffer Filing |
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if ($buf_len - $buf_pos < $startLength) { |
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$buf = array_splice($buffer, $buf_pos); |
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$new = $this->_reloadBuffer($fp, 100); |
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if ($new) { |
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$buffer = array_merge($buf, $new); |
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$buf_len = count($buffer); |
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$buf_pos = 0; |
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} else { |
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$has_data = false; |
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} |
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} |
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if ($buf_len - $buf_pos > 0) { |
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$size = 0; |
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for ($i = 0; $i < $startLength && isset($buffer[$buf_pos]); ++$i) { |
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++$size; |
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$bytes[] = $buffer[$buf_pos++]; |
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} |
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$need = $this->_charReader->validateByteSequence( |
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$bytes, $size |
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); |
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if ($need > 0) { |
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if ($buf_len - $buf_pos < $need) { |
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$new = $this->_reloadBuffer($fp, $need); |
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if ($new) { |
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$buffer = array_merge($buffer, $new); |
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$buf_len = count($buffer); |
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} |
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} |
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for ($i = 0; $i < $need && isset($buffer[$buf_pos]); ++$i) { |
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$bytes[] = $buffer[$buf_pos++]; |
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} |
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} |
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$this->_array[] = $bytes; |
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++$this->_array_size; |
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} |
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} while ($has_data); |
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fclose($fp); |
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} |
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/** |
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* Move the internal pointer to $charOffset in the stream. |
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* |
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* @param int $charOffset |
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*/ |
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public function setPointer($charOffset) |
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{ |
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if ($charOffset > $this->_array_size) { |
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$charOffset = $this->_array_size; |
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} elseif ($charOffset < 0) { |
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$charOffset = 0; |
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} |
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$this->_offset = $charOffset; |
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} |
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/** |
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* Empty the stream and reset the internal pointer. |
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*/ |
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public function flushContents() |
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{ |
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$this->_offset = 0; |
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$this->_array = array(); |
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$this->_array_size = 0; |
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} |
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/** |
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* @param resource $fp |
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* @param int $len |
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* |
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* @return array|false false on error |
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*/ |
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private function _reloadBuffer($fp, $len) |
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{ |
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if (!feof($fp)) { |
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$bytes = fread($fp, $len); |
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if ($bytes !== false) { |
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$buf = array(); |
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$len = strlen($bytes); |
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for ($i = 0; $i < $len; ++$i) { |
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$buf[] = self::$_byteMap[$bytes[$i]]; |
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} |
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return $buf; |
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} |
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} |
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return false; |
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} |
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private static function _initializeMaps() |
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{ |
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if (!isset(self::$_charMap)) { |
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self::$_charMap = array(); |
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for ($byte = 0; $byte < 256; ++$byte) { |
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self::$_charMap[$byte] = chr($byte); |
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} |
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self::$_byteMap = array_flip(self::$_charMap); |
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} |
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} |
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} |
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You can fix this by adding a namespace to your class:
When choosing a vendor namespace, try to pick something that is not too generic to avoid conflicts with other libraries.