/**
* Tries to find an object hash in the index
* @param resource $index The opened index file
* @param string $sha1 The binary SHA of the object
* @return int The offset in the packfile
*/
public static function findHashInIndex($index, $sha1)
{
list($cur, $after) = Packfile::readFanOut($index, $sha1, 8);
if ($cur == $after) {
return false;
}
fseek($index, 8 + 4 * 255);
$total_obj = Packfile::bin_fuint32($index);
fseek($index, 8 + 4 * 256 + 20 * $cur);
for ($i = $cur; $i < $after; $i++) {
$name = fread($index, 20);
if ($name == $sha1) {
break;
}
}
if ($i == $after) {
return false;
}
fseek($index, 8 + 4 * 256 + 24 * $total_obj + 4 * $i);
$offset = Packfile::bin_fuint32($index);
if ($offset & 0x80000000) {
// PHP cannot handle packfiles > 2GB
throw new \RangeException('64-bit packfile offsets not implemented');
}
return $offset;
}
/**
* Tries to find an object hash in the index
* @param resource $index The opened index file
* @param string $sha1 The binary SHA of the object
* @return int The offset in the packfile
*/
public static function findHashInIndex($index, $sha1)
{
list($cur, $after) = Packfile::readFanOut($index, $sha1, 0);
$n = $after - $cur;
if ($n == 0) {
return false;
}
fseek($index, 4 * 256 + 24 * $cur);
for ($i = 0; $i < $n; $i++) {
$off = Packfile::bin_fuint32($index);
$name = fread($index, 20);
if ($name == $sha1) {
return $off;
}
}
}
