public function testRopeOperations()
{
$rope = new PhutilRope();
$rope->append('aaa');
$rope->append('bbb');
$this->assertEqual(6, $rope->getByteLength());
$this->assertEqual('aaabbb', $rope->getAsString());
$rope->removeBytesFromHead(2);
$this->assertEqual(4, $rope->getByteLength());
$this->assertEqual('abbb', $rope->getAsString());
$rope->removeBytesFromHead(4);
$this->assertEqual(0, $rope->getByteLength());
$this->assertEqual('', $rope->getAsString());
}
public function testMoreRopeOperations()
{
$rope = new PhutilRope();
$rope->append('aaa');
$rope->append('bbb');
$rope->append('ccc');
$rope->append('rrrrddddddddd');
$rope->removeBytesFromHead(4);
$string = $rope->getAsString();
$this->assertEqual('bbcccrrrrddddddddd', $string);
$this->assertEqual(strlen($string), $rope->getByteLength());
$rope = new PhutilRope();
$rope->append('aaa');
$rope->append('bbb');
$rope->removeBytesFromHead(6);
$string = $rope->getAsString();
$this->assertEqual('', $string);
$this->assertEqual(0, $rope->getByteLength());
$rope = new PhutilRope();
$rope->append('a');
$rope->append('b');
$rope->append('c');
$rope->removeBytesFromHead(1024);
$string = $rope->getAsString();
$this->assertEqual('', $string);
$this->assertEqual(0, $rope->getByteLength());
}
private function processLog($mode)
{
$chunks = $this->newChunkIterator();
// NOTE: Because we're going to insert new chunks, we need to stop the
// iterator once it hits the final chunk which currently exists. Otherwise,
// it may start consuming chunks we just wrote and run forever.
$last = $this->loadLastChunkInfo();
if ($last) {
$chunks->setRange(null, $last['id']);
}
$byte_limit = self::CHUNK_BYTE_LIMIT;
$rope = new PhutilRope();
$this->openTransaction();
foreach ($chunks as $chunk) {
$rope->append($chunk->getChunkDisplayText());
$chunk->delete();
while ($rope->getByteLength() > $byte_limit) {
$this->writeEncodedChunk($rope, $byte_limit, $mode);
}
}
while ($rope->getByteLength()) {
$this->writeEncodedChunk($rope, $byte_limit, $mode);
}
$this->saveTransaction();
}
