private PFSDirectory parseDirectory(long dinode, PFSDirectory parent, string name)
{
if (dinodes == null)
{
throw new Exception("dinodes not set");
}
var ret = new PFSDirectory(parent, name);
foreach (long x in dinodes[dinode].db)
{
if (x <= 0)
{
continue;
}
_stream.Position = header.blocksz * x;
while (_stream.Position < header.blocksz * (x + 1))
{
var position = _stream.Position;
var dirent = readDirent();
if (dirent.type == TYPE_FILE)
{
ret.AddFile(parseFile(dirent.ino, ret, dirent.name));
}
else if (dirent.type == TYPE_DIR)
{
ret.AddDir(parseDirectory(dirent.ino, ret, dirent.name));
}
else if (dirent.type == 0)
{
break;
}
_stream.Position = position + dirent.entsize;
}
}
return(ret);
}
private PFSFile parseFile(long dinode, PFSDirectory parent, string name)
{
return(new PFSFile(name, parent, _stream, dinodes[dinode].direct_blocks[0] * (long)header.blocksz, dinodes[dinode].size, dinode));
}
private PFSDirectory parseDirectory(long dinode, PFSDirectory parent, string name)
{
if (dinodes == null)
{
throw new Exception("dinodes not set");
}
var ret = new PFSDirectory(parent, name);
// TODO: In the future, if it turns out (in)direct blocks are used,
// extract this to a method and use it for both files and dirs.
IList <int> dataBlocks;
if (dinodes[dinode].direct_blocks[1] == -1)
{
// PFS uses -1 to indicate that consecutive blocks are used.
dataBlocks = new int[dinodes[dinode].blocks];
for (var i = 0; i < dataBlocks.Count; i++)
{
dataBlocks[i] = i + dinodes[dinode].direct_blocks[0];
}
}
else
{
dataBlocks = dinodes[dinode].direct_blocks;
//TODO: Indirect blocks. I haven't seen these yet, maybe they would be
// used if PFS is used for saves or something?
}
foreach (var x in dataBlocks)
{
if (x == 0)
{
break;
}
_stream.Position = header.blocksz * x;
while (_stream.Position < header.blocksz * (x + 1))
{
var position = _stream.Position;
var dirent = readDirent();
if (dirent.type == TYPE_FILE)
{
ret.AddFile(parseFile(dirent.ino, ret, dirent.name));
}
else if (dirent.type == TYPE_DIR)
{
ret.AddDir(parseDirectory(dirent.ino, ret, dirent.name));
}
else if (dirent.type == 0)
{
break;
}
_stream.Position = position + dirent.entsize;
}
}
return(ret);
}
