/// <summary>
/// Returns the file data, decompressed if needed
/// </summary>
/// <param name="item">The grf file</param>
/// <param name="decompress">Should the data decompressed?</param>
/// <returns></returns>
public byte[] GetFileData(RoGrfFileItem item, bool decompress)
{
byte[] buf = null;
bool isUpdated = item.IsAdded || item.IsUpdated;
if (isUpdated)
{
// Load data from file
buf = File.ReadAllBytes(item.NewFilepath);
}
else if (item.FileData == null || item.FileData.Length != item.LengthCompressedAlign)
{
// Cache data
CacheFileData(item);
buf = item.FileData;
}
if (isUpdated == false && buf != null && buf.Length > 0)
{
// deocde, if needed
if (item.Cycle >= 0 && Deflate.IsMagicHead(buf) == false)
{
RoGrfHelper.DecryptFileData(buf, item.Cycle == 0, item.Cycle);
}
// Decompress data
if (decompress)
{
buf = Deflate.Decompress(buf);
}
}
return(buf);
}
/// <summary>
/// Reads the uncompressed body of versions between 0x100 and 0x103.
/// No compression of the body but a mess on filenames.
/// </summary>
/// <param name="binReader"></param>
/// <param name="fileCount"></param>
/// <param name="skipFiles"></param>
/// <returns></returns>
private bool ReadFilesVersion1(BinaryReader binReader, int fileCount, bool skipFiles)
{
mFileTableLength = (ulong)(binReader.BaseStream.Length - binReader.BaseStream.Position);
mFiletableUncompressed = binReader.ReadBytes((int)mFileTableLength);
// Read only body?
if (skipFiles == false)
{
for (int i = 0, offset = 0; i < fileCount; i++)
{
var itemTableOffset = (uint)offset;
var entryType = mFiletableUncompressed[offset + 12];
var offset2 = offset + BitConverter.ToInt32(mFiletableUncompressed, offset) + 4;
if (entryType == 0)
{
offset = offset2 + 17;
continue;
}
var nameLen = mFiletableUncompressed[offset] - 6;
// These are client limits
if (nameLen >= GrfMaxFilenameLength)
{
throw new Exception("Filename on index " + i + " is " + nameLen + " bytes long, max length is " + GrfMaxFilenameLength + ".");
}
var nameBuf = new byte[nameLen];
Buffer.BlockCopy(mFiletableUncompressed, offset + 6, nameBuf, 0, nameLen);
var name = RoGrfHelper.DecodeFileName(nameBuf);
// Check and fix the filename
if (name.Contains('\0'))
{
name = name.Substring(0, name.IndexOf('\0'));
}
var compressedLenAligned = (uint)(BitConverter.ToInt32(mFiletableUncompressed, offset2 + 4) - 37579);
var realLen = (uint)BitConverter.ToInt32(mFiletableUncompressed, offset2 + 8);
var pos = (uint)BitConverter.ToInt32(mFiletableUncompressed, offset2 + 13);
var cycle = 0;
var compressedLen = 0;
if (name.Contains("."))
{
var ext = "." + name.Split('.').Last().ToLower();
compressedLen = BitConverter.ToInt32(mFiletableUncompressed, offset2) - BitConverter.ToInt32(mFiletableUncompressed, offset2 + 8) - 715;
if (ext != ".gnd" && ext != ".gat" && ext != ".act" && ext != ".str")
{
cycle = 1;
for (int j = 10; compressedLen >= j; j *= 10)
{
cycle++;
}
}
}
name = Tools.UnifyPath(name);
var item = new RoGrfFileItem {
TableOffset = itemTableOffset,
Index = Files.Count,
Filepath = name,
LengthCompressed = (uint)compressedLen,
LengthCompressedAlign = compressedLenAligned,
LengthUnCompressed = realLen,
Flags = entryType,
// base offset + header length
DataOffset = pos + GrfHeaderLen
};
Files.Add(item.NameHash, item);
mStringlist.Add(item.NameHash);
mFileDataLength += item.LengthCompressedAlign;
offset += (int)GrfFileLen;
#if !DISABLE_GRF_EVENTS
OnItemAdded(item, i, fileCount);
#endif
}
}
return(true);
}
