public static File[] Open(Stream Packget)
{
StructReader Reader = new StructReader(Packget, Encoding.UTF8);
dynamic tmp = new FPacHeader();
Reader.ReadStruct(ref tmp);
Header = tmp;
if (Header.Signature != 0x43415046)
{
throw new Exception("Invalid Packget");
}
List <Entry> Entries = new List <Entry>();
for (uint i = 0; i < Header.FilesCount; i++)
{
tmp = new Entry()
{
Dummy = Dummy,
FixPadding = Padding
};
Reader.ReadStruct(ref tmp);
Entries.Add(tmp);
}
List <File> Files = new List <File>();
foreach (Entry Entry in Entries)
{
File FileEntry = new File()
{
FileName = Entry.FileName,
Data = new MemoryStream()
};
uint Offset = Entry.Offset + Header.BaseOffset;
Reader.Seek(Offset, SeekOrigin.Begin);
byte[] Buffer = new byte[1024 * 1040];
int TotalReaded = 0;
int Readed = 0;
do
{
if (TotalReaded + Buffer.Length >= Entry.Length)
{
Buffer = new byte[Entry.Length - TotalReaded];
}
Readed = Reader.Read(Buffer, 0, Buffer.Length);
TotalReaded += Readed;
FileEntry.Data.Write(Buffer, 0, Readed);
} while (Readed > 0 && TotalReaded < Entry.Length);
FileEntry.Data.Position = 0;
Files.Add(FileEntry);
}
Reader.Close();
return(Files.ToArray());
}
public static void Pack(File[] Files, Stream Output)
{
Header = new FPacHeader()
{
Signature = 0x43415046,
Dummy1 = 1,
Dummy2 = 0,
FilesCount = (uint)Files.Length
};
uint Tmp = 0;
foreach (File File in Files)
{
if (Encoding.UTF8.GetByteCount(File.FileName) > Tmp)
{
Tmp = (uint)Encoding.UTF8.GetByteCount(File.FileName);
}
}
while (Tmp % 4 != 0)
{
Tmp++;
}
int EntryLen = (int)Tools.GetStructLength(new Entry(), (int)Tmp);
while (EntryLen % 16 != 0)
{
EntryLen++;
}
uint DataLength = ((uint)EntryLen * Header.FilesCount) + (uint)Tools.GetStructLength(Header);
Header.BaseOffset = DataLength;
foreach (File File in Files)
{
DataLength += (uint)File.Data.Length;
}
Header.PackgetSize = DataLength;
Header.FilesNameLen = Tmp;
StructWriter Writer = new StructWriter(Output, Encoding.UTF8);
dynamic obj = Header;
Writer.WriteStruct(ref obj);
DataLength = Header.BaseOffset;
Tmp = 0;
foreach (File File in Files)
{
dynamic Entry = new Entry()
{
FileName = File.FileName,
Offset = DataLength - Header.BaseOffset,
Dummy = Dummy,
FileIndex = Tmp++,
FixPadding = Padding,
Length = (uint)File.Data.Length
};
DataLength += (uint)File.Data.Length;
Writer.WriteStruct(ref Entry);
}
DataLength = Header.BaseOffset;
foreach (File File in Files)
{
int Readed = 0;
byte[] Buffer = new byte[1024 * 1024];
do
{
Readed = File.Data.Read(Buffer, 0, Buffer.Length);
Writer.Write(Buffer, 0, Readed);
} while (Readed > 0);
File.Data.Close();
}
Writer.Close();
Output?.Close();
}
