public static S3D Load(string file)
{
S3D s3d = null;
//var fileInfo = new FileInfo(file);
//var s3dFile = new byte[fileInfo.Length];
using (var fs = new FileStream(file, FileMode.Open, FileAccess.Read))
{
int size = Marshal.SizeOf(typeof(PFSHeader));
var barray = new byte[size];
fs.Read(barray, 0, size);
PFSHeader header = Functions.ByteArrayToStructure<PFSHeader>(barray);
unsafe
{
if (header.MagicCookie[0] != 'P' && header.MagicCookie[1] != 'F' && header.MagicCookie[2] != 'S' && header.MagicCookie[3] != ' ')
{
throw new ArgumentException();
}
}
int uint32size = Marshal.SizeOf(typeof(UInt32));
//determine the file count
fs.Seek(header.Offset, SeekOrigin.Begin);
barray = new byte[uint32size];
fs.Read(barray, 0, uint32size);
int filecount = BitConverter.ToInt32(barray, 0);
//var files = new ArchiveFile[filecount];
var files = new List<ArchiveFile>();
size = Marshal.SizeOf(typeof(PFSMeta));
ArchiveFile directory = new ArchiveFile();
for (int i = 0; i < filecount; i++)
{
barray = new byte[size];
fs.Read(barray, 0, size);
var block = Functions.ByteArrayToStructure<PFSMeta>(barray);
var f = new ArchiveFile();
f.Meta = block;
if (block.CRC == 0x61580AC9)
{
directory = f;
}
else
{
files.Add(f);
}
}
if (directory.Meta.Offset == 0 || directory.Meta.Size == 0) throw new Exception("Could not find directory in archive");
fs.Seek(directory.Meta.Offset, SeekOrigin.Begin);
size = Marshal.SizeOf(typeof(PFSData));
barray = new byte[size];
var tempBuffer = new ArrayList( (int)directory.Meta.Size);
int inflatedSize = 0;
while( inflatedSize < directory.Meta.Size )
{
fs.Read(barray, 0, size);
var data = Functions.ByteArrayToStructure<PFSData>(barray);
var deflatedBuffer = new byte[data.DeflatedLength];
var inflatedBuffer = new byte[data.InflatedLength];
fs.Read(deflatedBuffer, 0, (int)data.DeflatedLength);
s3d = new S3D();
s3d.Decompress(deflatedBuffer, (int)data.DeflatedLength, inflatedBuffer, (int)data.InflatedLength);
tempBuffer.AddRange(inflatedBuffer);
inflatedSize += (int)data.InflatedLength;
}
if (directory.Meta.Size != tempBuffer.Count)
{
throw new Exception("Directory size mismatch");
}
List<string> fileNames = new List<string>();
using (var ms = new MemoryStream(tempBuffer.Cast<byte>().ToArray()))
{
ms.Seek(8, SeekOrigin.Begin);
var encoding = new ASCIIEncoding();
for (int i = 0; i < filecount - 1; i++)
{
int val = -1;
List<byte> namechars = new List<byte>();
while (val != 0)
{
val = ms.ReadByte();
if (val != 0)
{
namechars.Add((byte)val);
}
else
{
fileNames.Add(encoding.GetString(namechars.ToArray()));
ms.Seek(4, SeekOrigin.Current);
break;
}
}
}
}
s3d._files = files.OrderBy(x => x.Meta.Offset);
for (int i = 0; i < s3d._files.Count(); i++)
{
s3d._files.ElementAt(i).Name = fileNames.ElementAt(i).ToLower();
s3d.DecompressFile(s3d._files.ElementAt(i), fs);
}
}
return s3d;
}
private void DecompressFile(ArchiveFile file, Stream stream)
{
int totalInflated = 0;
int size = Marshal.SizeOf(typeof(PFSData));
int offset = (int)file.Meta.Offset;
List<byte> inflatedBytes = new List<byte>();
stream.Seek(offset, SeekOrigin.Begin);
while (totalInflated < file.Meta.Size)
{
var barray = new byte[size];
stream.Read(barray, 0, size);
var data = Functions.ByteArrayToStructure<PFSData>(barray);
barray = new byte[data.DeflatedLength];
stream.Read(barray, 0, (int)data.DeflatedLength);
var inflated = new byte[data.InflatedLength];
Decompress(barray, (int)data.DeflatedLength, inflated, (int)data.InflatedLength);
inflatedBytes.AddRange(inflated);
totalInflated += (int)data.InflatedLength;
}
file.Bytes = inflatedBytes.ToArray();
}