private void LoadHeader(byte[] header)
{
if (header.Length < 4)
{
throw new InvalidDataException("NAR header is invalid.");
}
int version = BitConverter.ToInt32(header, 0);
if (version != 1)
{
throw new InvalidDataException("NAR header version is invalid.");
}
if (header.Length < 16)
{
throw new InvalidDataException("NAR header is invalid.");
}
BitConverter.ToInt32(header, 4);
BitConverter.ToInt32(header, 8);
BitConverter.ToInt32(header, 12);
int directoryCount = BitConverter.ToInt32(header, 16);
if (directoryCount < 0)
{
throw new InvalidDataException("Directory entry count is too large.");
}
int entryOffset = 20;
for (int i = 0; i < directoryCount; i++)
{
NexonArchiveFileEntry fileEntry = new NexonArchiveFileEntry(this);
entryOffset += fileEntry.Load(header, entryOffset);
this.fileEntries.Add(fileEntry);
}
}
internal int Load(byte[] header, int offset)
{
int result;
try
{
int pathSize = (int)BitConverter.ToUInt16(header, offset);
this.path = Encoding.ASCII.GetString(header, offset + 2, pathSize);
this.storedType = (NexonArchiveFileEntryType)BitConverter.ToInt32(header, offset + 2 + pathSize);
this.offset = (long)((ulong)BitConverter.ToUInt32(header, offset + 2 + pathSize + 4));
this.storedSize = (long)BitConverter.ToInt32(header, offset + 2 + pathSize + 8);
this.extractedSize = (long)BitConverter.ToInt32(header, offset + 2 + pathSize + 12);
this.lastModifiedTime = NexonArchiveFileEntry.FromEpoch(BitConverter.ToInt32(header, offset + 2 + pathSize + 16));
this.checksum = BitConverter.ToUInt32(header, offset + 2 + pathSize + 20);
result = 2 + pathSize + 24;
}
catch (ArgumentOutOfRangeException ex)
{
throw new InvalidDataException("NAR file entry is invalid.", ex);
}
return(result);
}