private void ReadIndex(FileStream file)
{
var arr = new byte[header.directorySize];
int readLen = file.Read(arr, 0, header.directorySize);
if (readLen != header.directorySize)
{
Debug.WriteLine(String.Format(
"ERROR: File reading: Expecting length {0}, got {1}.",
header.directorySize, readLen));
throw new VpkException(VpkException.ExceptionReason.Unknown);
}
try {
for (int i = 0; i < readLen;)
{
// Ahh, ref.Cannot imagine whatif it's in java.
// https://www.c-sharpcorner.com/article/ref-keyword-in-c-sharp/
// https://stackoverflow.com/questions/186891/why-use-the-ref-keyword-when-passing-an-object
var extensionName = CStringUtil.ReadCString(arr, ref i);
if (extensionName.Length == 0)
{
break;
}
var extensionNode = new Dictionary <string, Dictionary <string, VpkContainedFileDescription> >();
Vindex[extensionName] = extensionNode;
i = ReadUnderExtensionName(arr, i, extensionNode);
}
} catch (InvalidOperationException) {
Debug.WriteLine(
"ERROR: File index parsing: Reading null-terminated string out of bound."
);
throw new VpkException(VpkException.ExceptionReason.Unknown);
}
}
private int ReadUnderPath(byte[] buffer, int offset, Dictionary <string, VpkContainedFileDescription> pathNode)
{
int maxLen = buffer.Length;
while (offset < maxLen)
{
var name = CStringUtil.ReadCString(buffer, ref offset);
if (name.Length == 0)
{
break;
}
//name = JoinPath(path, name, extensionName);
var fileNode = new VpkContainedFileDescription(name);
pathNode[name] = fileNode;
offset = ReadFileIndexerOfName(buffer, offset, fileNode);
}
return(offset);
}
private int ReadUnderExtensionName(byte[] buffer, int offset,
Dictionary <string, Dictionary <string, VpkContainedFileDescription> > extensionNode)
{
int maxLen = buffer.Length;
while (offset < maxLen)
{
var path = CStringUtil.ReadCString(buffer, ref offset);
if (path.Length == 0)
{
break;
}
if (path == " ")
{
path = "";
}
var pathNode = new Dictionary <string, VpkContainedFileDescription>();
extensionNode[path] = pathNode;
offset = ReadUnderPath(buffer, offset, pathNode);
}
return(offset);
}