Encode a negative varint.
| public encodeVarint ( integer $value ) : array | ||
| $value | integer | |
| Результат | array | |
/**
* Store an integer encoded as varint.
*
* @param \Protobuf\Stream $stream
* @param integer $value
*/
public function writeVarint(Stream $stream, $value)
{
// Small values do not need to be encoded
if ($value >= 0 && $value < 0x80) {
$this->writeByte($stream, $value);
return;
}
$values = null;
// Build an array of bytes with the encoded values
if ($value > 0) {
$values = [];
while ($value > 0) {
$values[] = 0x80 | $value & 0x7f;
$value = $value >> 7;
}
}
if ($values === null) {
$values = $this->negativeEncoder->encodeVarint($value);
}
// Remove the MSB flag from the last byte
$values[count($values) - 1] &= 0x7f;
// Convert the byte sized ints to actual bytes in a string
$values = array_merge(['C*'], $values);
$bytes = call_user_func_array('pack', $values);
$this->writeBytes($stream, $bytes);
}
