/**
* Reads a block of the physical file that the torrent represents.
*
* @param integer $piece_index Index of the piece containing the block.
* @param integer $block_begin Beginning of the block relative to the piece in byets.
* @param integer $length Length of the block in bytes.
* @return string
*/
public function readBlock($piece_index, $block_begin, $length)
{
if ($piece_index > ceil($this->__get('length') / $this->size_piece) - 1) {
throw new PHPTracker_Error('Invalid piece index: ' . $piece_index);
}
if ($block_begin + $length > $this->size_piece) {
throw new PHPTracker_Error('Invalid block boundary: ' . $block_begin . ', ' . $length);
}
return $this->file->readBlock($piece_index * $this->size_piece + $block_begin, $length);
}
public function testReadBlock()
{
$this->assertEquals(substr(self::TEST_DATA, 2, 2), $this->object->readBlock(2, 2));
}