public function get($ip)
{
$ipFloat = (double) sprintf("%u", ip2long($ip));
if ($ipFloat < $this->hashMin || $ipFloat >= $this->hashMax) {
return NULL;
}
$pos = $this->hashFunc($ipFloat);
fseek($this->fp, -12 - $this->hashListCount * 4 + $pos * 4, SEEK_END);
$ptr = binaryPacker::unpackInt(fread($this->fp, 4));
fseek($this->fp, $ptr);
$listCount = binaryPacker::unpackInt(fread($this->fp, 4));
$found = false;
if ($listCount == 0) {
return NULL;
}
$buf = fread($this->fp, $listCount * 12);
for ($i = 0; $i < $listCount; $i++) {
$curSegmentMin = binaryPacker::unpackInt(substr($buf, $i * 12, 4));
if ($ipFloat < $curSegmentMin) {
return NULL;
}
$curSegmentMax = binaryPacker::unpackInt(substr($buf, 4 + $i * 12, 4));
if ($curSegmentMin <= $ipFloat && $ipFloat <= $curSegmentMax) {
$codePtrs = binaryPacker::unpackInt(substr($buf, 8 + $i * 12, 4));
$found = true;
break;
}
}
if (!$found) {
return NULL;
}
fseek($this->fp, $codePtrs);
$varCharSize = binaryPacker::unpackInt(fread($this->fp, 4));
return fread($this->fp, $varCharSize);
}
private function readInt()
{
$buf = $this->dbStream->read(4);
return binaryPacker::unpackInt($buf);
}
private function writeInt($intVal)
{
$this->dbStream->write(binaryPacker::packInt($intVal));
}
public function testPackLargeInt()
{
$buf = binaryPacker::packInt(3000000000);
$this->assertEquals(3000000000, binaryPacker::unpackInt($buf));
}
