/*
* Reads pack header from the given reader.
*/
public static PFHeader ReadHeader(BinaryReader reader)
{
PFHeader header;
string packIdentifier = new string (reader.ReadChars(4));
header = new PFHeader(packIdentifier);
int packType = reader.ReadInt32();
header.PrecedenceByte = (byte)packType;
// header.Type = (PackType)packType;
header.Version = reader.ReadInt32();
int replacedPackFilenameLength = reader.ReadInt32();
reader.BaseStream.Seek(0x10L, SeekOrigin.Begin);
header.FileCount = reader.ReadUInt32();
UInt32 indexSize = reader.ReadUInt32();
header.DataStart = header.Length + indexSize;
if (header.PackIdentifier == "PFH4" || header.PackIdentifier == "PFH5")
{
header.Unknown = reader.ReadUInt32();
}
// go to correct position
reader.BaseStream.Seek(header.Length, SeekOrigin.Begin);
for (int i = 0; i < header.Version; i++)
{
header.ReplacedPackFileNames.Add(IOFunctions.TheadUnsafeReadZeroTerminatedAscii(reader));
}
header.DataStart += replacedPackFilenameLength;
return(header);
}
/*
* Decode pack file at the given path.
*/
public PackFile Open(string packFullPath)
{
PackFile file;
long sizes = 0;
using (var reader = new BinaryReader(new FileStream(packFullPath, FileMode.Open), Encoding.ASCII))
{
PFHeader header = ReadHeader(reader);
file = new PackFile(packFullPath, header);
OnHeaderLoaded(header);
long offset = file.Header.DataStart;
for (int i = 0; i < file.Header.FileCount; i++)
{
uint size = reader.ReadUInt32();
sizes += size;
if (file.Header.HasAdditionalInfo)
{
header.AdditionalInfo = reader.ReadUInt32();
}
if (file.Header.PackIdentifier == "PFH5")
{
reader.ReadByte();
}
string packedFileName = IOFunctions.TheadUnsafeReadZeroTerminatedAscii(reader);
// this is easier because we can use the Path methods
// under both Windows and Unix
packedFileName = packedFileName.Replace('\\', Path.DirectorySeparatorChar);
PackedFile packed = new PackedFile(file.Filepath, packedFileName, offset, size);
file.Add(packed);
packed.IsAdded = false; // Reset the flag as the file is not really added as a new file, it is loaded for the first time
offset += size;
OnPackedFileLoaded(packed);
}
}
OnFinishedLoading(file);
file.IsModified = false;
return(file);
}
/*
* Find next file entry and return true if there is one, otherwise false.
*/
public bool MoveNext()
{
currentFileIndex++;
if (currentFileIndex > header.FileCount)
{
return(false);
}
uint size = reader.ReadUInt32();
//FIXME this is wrong, different PFH versions have different length additionalInfo
//TODO this is mostly duplicated with PackFileCodec. Reducing code duplication would be wise.
if (Header.HasAdditionalInfo)
{
header.AdditionalInfo = reader.ReadUInt32();
}
if (Header.PackIdentifier == "PFH5")
{
reader.ReadByte();
}
try {
string packedFileName = IOFunctions.TheadUnsafeReadZeroTerminatedAscii(reader);
// this is easier because we can use the Path methods
// under both Windows and Unix
packedFileName = packedFileName.Replace('\\', Path.DirectorySeparatorChar);
currentFile = new PackedFile(filepath, packedFileName, offset, size);
offset += size;
return(true);
} catch (Exception ex) {
Console.WriteLine("Failed enumeration of {2}/{3} file in {0}: {1}",
Path.GetFileName(filepath), ex, currentFileIndex, header.FileCount);
Console.WriteLine("Current position in file: {0}; last succesful file: {1}",
reader.BaseStream.Position, Current.FullPath);
}
return(false);
}