/*
* Reads the header, directory, and filenames blocks from the file. Doesn't read actual sub-file data
* Useful for quick initial analysis of a packfile for use with tools, so they can see what's inside
* without loading the bulk of the data.
*/
public void ReadMetadata(string packfilePath)
{
PackfilePath = packfilePath;
string packfileName = Path.GetFileName(packfilePath);
var packfileInfo = new FileInfo(packfilePath);
Filename = packfileName;
Console.WriteLine("Extracting " + packfileName + "...");
if (packfileInfo.Length <= 2048)
{
Console.WriteLine($"Cancelled extraction of {packfileName}. Packfile is empty!");
return;
}
if (Verbose)
{
Console.WriteLine(packfileName + "> Reading header data...");
}
using var stream = new FileStream(packfilePath, FileMode.Open);
var packfile = new BinaryReader(stream);
Header = new PackfileHeader();
Header.ReadFromBinary(packfile);
for (int i = 0; i < Header.NumberOfFiles; i++)
{
var entry = new PackfileEntry();
entry.ReadFromBinary(packfile);
DirectoryEntries.Add(entry);
}
packfile.ReadBytes(2048 - ((int)packfile.BaseStream.Position % 2048)); //Alignment Padding
for (int i = 0; i < Header.NumberOfFiles; i++)
{
var name = new StringBuilder();
do
{
name.Append(packfile.ReadChar());
}while (packfile.PeekChar() != 0);
packfile.ReadByte(); //Move past null byte
if (Path.GetExtension(name.ToString()) == ".asm_pc")
{
ContainsAsmFiles = true;
}
DirectoryEntries[i].FileName = name.ToString();
DirectoryEntries[i].Extension = Path.GetExtension(name.ToString());
}
packfile.ReadBytes(2048 - ((int)packfile.BaseStream.Position % 2048)); //Alignment Padding
DataStartOffset = (uint)packfile.BaseStream.Position;
MetadataWasRead = true;
packfile.Dispose();
//Fix data offsets. Values in packfile not always valid.
FixEntryDataOffsets();
}
public bool TryGetSubfileEntry(string subFileName, out PackfileEntry entry)
{
entry = null;
int index = GetSubfileIndex(subFileName);
if (index < 0)
{
return(false);
}
entry = DirectoryEntries[index];
return(true);
}