protected static function toBitArray($string)
{
$result = new BitArray();
for ($i = 0; $i < strlen($string); $i++) {
if ($string[$i] == 'X') {
$result->append(1);
} elseif ($string[$i] == '.') {
$result->append(0);
}
}
return $result;
}
public function testAppend()
{
$array = new BitArray(2);
$array->append(0x7, 3);
$this->assertEquals(5, $array->getLength());
$this->assertEquals(array(0, 0, 1, 1, 1), $array->asArray());
}
public function appendTo(BitArray $bitArray, array $text)
{
for ($i = 0; $i < $this->shiftByteCount; $i++) {
if ($i == 0 || $i == 31 && $this->shiftByteCount <= 62) {
$bitArray->append(31, 5);
if ($this->shiftByteCount > 62) {
$bitArray->append($this->shiftByteCount - 31, 16);
} elseif ($i == 0) {
$bitArray->append(min($this->shiftByteCount, 31), 5);
} else {
$bitArray->append($this->shiftByteCount - 31, 5);
}
}
$bitArray->append(ord($text[$this->shiftStart + $i]), 8);
}
return $bitArray;
}
public function encode($data)
{
$result = new BitArray();
while (strlen($data) >= 32) {
$chunkLength = min(strlen($data), 2048 + 32 - 1);
$result->append(self::CODE_UPPER_BS, 5);
$result->append(0, 5);
$result->append($chunkLength - 32, 11);
$result->appendBytes(substr($data, 0, $chunkLength));
$data = substr($data, $chunkLength);
}
if (strlen($data) > 0) {
$result->append(self::CODE_UPPER_BS, 5);
$result->append(strlen($data), 5);
$result->appendBytes($data);
}
return $result;
}
public static function generateCheckWords(BitArray $stuffedBits, $totalSymbolBits, $wordSize)
{
$messageSizeInWords = intval(($stuffedBits->getLength() + $wordSize - 1) / $wordSize);
for ($i = $messageSizeInWords * $wordSize - $stuffedBits->getLength(); $i > 0; $i--) {
$stuffedBits->append(1);
}
$totalSizeInFullWords = intval($totalSymbolBits / $wordSize);
$messageWords = self::bitsToWords($stuffedBits, $wordSize, $totalSizeInFullWords);
$rs = new ReedSolomonEncoder(self::getGF($wordSize));
$messageWords = $rs->encodePadded($messageWords, $totalSizeInFullWords - $messageSizeInWords);
$startPad = $totalSymbolBits % $wordSize;
$messageBits = new BitArray();
$messageBits->append(0, $startPad);
foreach ($messageWords as $messageWord) {
$messageBits->append($messageWord, $wordSize);
}
return $messageBits;
}
public function appendTo(BitArray $bitArray, array $text)
{
$bitArray->append($this->value, $this->bitCount);
return $bitArray;
}
