/**
* Tests the conversion of a hexadecimal string into a signed integer.
*
* @dataProvider hexToSignedIntProvider
* @covers hexToSignedInt
*
* @param string $hex a hexadecimal string
* @param int $res the resulting signed integer
*/
public function testHexToSignedInt($hex, $res)
{
$this->assertSame($res, Math::hexToSignedInt($hex));
}
/**
* Decodes a GID string and outputs the results as array.
*
* @param string $gid the GID to parse
* @return array boolean array with indices <code>type</code>, <code>crc32Name</code>,
* <code>localID</code> and <code>uniqueID</code> for the GID type, CRC32 of name (hexadecimal),
* local ID and unique ID or <code>false</code> if the GID string is malformed
*/
public function decode($gid)
{
if (!preg_match('#^[0-9a-f]{32}$#', $gid)) {
return false;
}
$res = array();
$res['type'] = (int) hexdec($gid[0]);
$res['crc32Name'] = ltrim(substr($gid, 1, 8), '0');
if (empty($res['crc32Name'])) {
$res['crc32Name'] = '0';
}
$res['localID'] = Math::hexToSignedInt(ltrim(substr($gid, 9, 8), '0'));
$res['uniqueID'] = ltrim(substr($gid, 17, 13), '0');
return $res;
}