//作者：Wetor
//时间：2019.7.25
public static void Pack(string file)
{
Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
string out_file = Path.Combine(Path.GetDirectoryName(file), Path.GetFileNameWithoutExtension(file));
string in_dir = out_file + "_unpacked" + Path.DirectorySeparatorChar;
out_file += ".out";
Stream header = new StreamReader(file).BaseStream;
PAKHeader pak_header = new PAKHeader();
StructReader Reader = new StructReader(header, Encoding: Encoding.GetEncoding(coding));
Reader.ReadStruct(ref pak_header);
BinaryWriter bw = new BinaryWriter(File.Open(out_file, FileMode.Create));
long save_pos = Reader.BaseStream.Position;
Reader.Seek(0, SeekOrigin.Begin);
bw.Write(Reader.ReadBytes((int)Reader.BaseStream.Length));//复制文件头信息
Reader.Seek(save_pos, SeekOrigin.Begin);
//从保存的文件头中读取文件名等信息
while (Reader.PeekInt() != pak_header.HeaderLength / pak_header.BlockSize)
{
Reader.Seek(0x4, SeekOrigin.Current);
}
bool Named = (pak_header.Flags & (uint)PackgetFlags.NamedFiles) != 0;
string[] Names = new string[pak_header.FileCount];
if (Named)
{
long Off = Reader.BaseStream.Position;
Reader.Seek(-0x4, SeekOrigin.Current);
Reader.Seek(Reader.ReadUInt32(), SeekOrigin.Begin);
for (uint i = 0; i < Names.Length; i++)
{
List <byte> strArr = new List <byte> {
};
byte tmp = Reader.ReadByte();
while (tmp != 0x00)
{
strArr.Add(tmp);
tmp = Reader.ReadByte();
}
Names[i] = Encoding.GetEncoding(coding).GetString(strArr.ToArray());
int ID = 1;
for (int j = 0; j < i; j++)
{
if (Names[j] == Names[i])
{
ID++;
}
}
if (ID > 1)
{
Names[i] += "." + ID.ToString();
}
}
Reader.Seek(Off, SeekOrigin.Begin);
}
else
{
for (uint i = 0; i < Names.Length; i++)
{
Names[i] = i.ToString("X8");
}
}
//写入文件
for (uint i = 0; i < pak_header.FileCount; i++)
{
Entry out_file_info;
out_file_info.Offset = (uint)(bw.BaseStream.Position / pak_header.BlockSize);
out_file_info.Content = File.Open(in_dir + Names[i], FileMode.Open);
out_file_info.Length = (uint)out_file_info.Content.Length;
out_file_info.Content.CopyTo(bw.BaseStream);
save_pos = bw.BaseStream.Position;
bw.Seek((int)Reader.BaseStream.Position, SeekOrigin.Begin);
bw.Write(BitConverter.GetBytes(out_file_info.Offset));
bw.Write(BitConverter.GetBytes(out_file_info.Length));
bw.Seek((int)save_pos, SeekOrigin.Begin);
if (i == pak_header.FileCount - 1)
{
while (bw.BaseStream.Position % pak_header.BlockSize != 0)
{
bw.Write((byte)0x00);
}
}
else if (save_pos % pak_header.BlockSize != 0)
{
bw.Seek((int)(pak_header.BlockSize - (save_pos % pak_header.BlockSize)), SeekOrigin.Current);
}
Reader.Seek(0x08, SeekOrigin.Current);
Console.WriteLine("{0:X} {1} {2}", out_file_info.Offset, Names[i], out_file_info.Length);
//AppendArray(ref Files, File);
}
bw.Close();
Reader.Close();
header.Close();
}
public static Entry[] Unpack(Stream Packget, out uint data_pos)
{
Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
var Files = new Entry[0];
PAKHeader Header = new PAKHeader();
StructReader Reader = new StructReader(Packget, Encoding: Encoding.GetEncoding(coding));
Reader.ReadStruct(ref Header);
Reader.Seek(0x24, SeekOrigin.Begin);
data_pos = Header.HeaderLength;
//Search for the First Offset
while (Reader.PeekInt() != Header.HeaderLength / Header.BlockSize)
{
Reader.Seek(0x4, SeekOrigin.Current);
}
bool Named = (Header.Flags & (uint)PackgetFlags.NamedFiles) != 0;
string[] Names = new string[Header.FileCount];
if (Named)
{
long Off = Reader.BaseStream.Position;
Reader.Seek(-0x4, SeekOrigin.Current);
Reader.Seek(Reader.ReadUInt32(), SeekOrigin.Begin);
for (uint i = 0; i < Names.Length; i++)
{
List <byte> strArr = new List <byte> {
};
byte tmp = Reader.ReadByte();
while (tmp != 0x00)
{
strArr.Add(tmp);
tmp = Reader.ReadByte();
}
Names[i] = Encoding.GetEncoding(coding).GetString(strArr.ToArray());
//Console.WriteLine("{0} {1}", Names[i], i);
//Names[i] = Reader.ReadString(StringStyle.CString);
}
Reader.Seek(Off, SeekOrigin.Begin);
}
else
{
for (uint i = 0; i < Names.Length; i++)
{
Names[i] = i.ToString("X8");
}
}
for (uint i = 0; i < Header.FileCount; i++)
{
var File = new Entry();
Reader.ReadStruct(ref File);
File.Offset *= Header.BlockSize;
File.FileName = Names[Files.LongLength];
File.Content = new VirtStream(Packget, File.Offset, File.Length);
AppendArray(ref Files, File);
}
return(Files);
}
