public void ReadRDAFile()
{
read = new BinaryReader(new FileStream(FileName, FileMode.Open));
byte[] firstTwoBytes = read.ReadBytes(2); read.BaseStream.Position = 0;
if (firstTwoBytes[0] == 'R' && firstTwoBytes[1] == '\0')
{
fileHeader = ReadFileHeader(read, FileHeader.Version.Version_2_0);
}
else if (firstTwoBytes[0] == 'R' && firstTwoBytes[1] == 'e')
{
fileHeader = ReadFileHeader(read, FileHeader.Version.Version_2_2);
}
else
{
throw new Exception("Invalid or unsupported RDA file!");
}
rdaReadBlocks = 0;
skippedDataSections.Clear();
ulong beginningOfDataSection = (ulong)read.BaseStream.Position;
ulong currentBlockOffset = fileHeader.firstBlockOffset;
while (currentBlockOffset < (ulong)read.BaseStream.Length)
{
ulong nextBlockOffset = ReadBlock(currentBlockOffset, beginningOfDataSection);
beginningOfDataSection = currentBlockOffset + BlockInfo.GetSize(fileHeader.version);
currentBlockOffset = nextBlockOffset;
}
// When writing we need to make sure that the section that is latest in the file is the last one in this list.
skippedDataSections.Sort((a, b) => a.offset.CompareTo(b.offset));
rdaFolder = RDAFolder.GenerateFrom(rdaFileEntries, fileHeader.version);
UpdateOutput("Done. " + rdaFileEntries.Count + " files. " + rdaReadBlocks + " blocks read, " + NumSkippedBlocks + " encrypted blocks skipped (" + NumSkippedFiles + " files).");
}
public void Write(string Filename, FileHeader.Version version, bool compress, RDAReader originalReader, BackgroundWorker wrk)
{
FileStream fileStream = new FileStream(Filename, FileMode.Create);
BinaryWriter writer = new BinaryWriter(fileStream);
// we'll write the header at the end, when we know the offset to the first block
writer.BaseStream.Position = FileHeader.GetSize(version);
// blocks are organized by file type. there is one RDAFolder per block
List <RDAFolder> blockFolders = RDABlockCreator.GenerateOf(Folder);
int numBlocks = (int)originalReader.NumSkippedBlocks + blockFolders.Count;
BlockInfo[] blockInfos = new BlockInfo[numBlocks];
ulong[] blockInfoOffsets = new ulong[numBlocks];
int writeBlockIndex = 0;
// Write blocks skipped when reading. They have to appear at exactly the place where they came
// from, because the file data offsets are encrypted and can therefore not be changed.
for (int skippedBlockIndex = 0; skippedBlockIndex < originalReader.NumSkippedBlocks; ++skippedBlockIndex)
{
RDASkippedDataSection skippedBlock = originalReader.SkippedDataSections[skippedBlockIndex];
if (wrk != null)
{
UI_LastMessage = "Writing Block " + (writeBlockIndex + 1) + "/" + numBlocks + " => ??? files (encrypted)";
wrk.ReportProgress((int)((double)writeBlockIndex / numBlocks * 100.0));
}
// Skip ahead to the correct position.
// This will create "holes" in the file if the skipped sections are not contiguous or
// don't start at the beginning of the file, but we'll have to live with it to some extent
// anyway (we won't fit our "own" data in perfectly). And I'm just too afraid to get the
// bin-packing wrong.
writer.BaseStream.WriteBytes((skippedBlock.offset - (ulong)writer.BaseStream.Position), 0);
// write the data
originalReader.CopySkippedDataSextion(skippedBlock.offset, skippedBlock.size, writer.BaseStream);
// generate the new block info
BlockInfo blockInfo = skippedBlock.blockInfo.Clone();
blockInfos[writeBlockIndex] = blockInfo;
blockInfoOffsets[writeBlockIndex] = (ulong)writer.BaseStream.Position;
if (writeBlockIndex > 0)
{
blockInfos[writeBlockIndex - 1].nextBlock = blockInfoOffsets[writeBlockIndex];
}
// we'll write the block info at the end, once we know the next block offset
writer.BaseStream.Position += BlockInfo.GetSize(version);
++writeBlockIndex;
}
// write regular blocks
for (int blockFolderIndex = 0; blockFolderIndex < blockFolders.Count; ++blockFolderIndex)
{
RDAFolder blockFolder = blockFolders[blockFolderIndex];
bool compressBlock = compress && blockFolder.RDABlockCreator_FileType_IsCompressable.GetValueOrDefault(false);
if (wrk != null)
{
UI_LastMessage = "Writing Block " + (writeBlockIndex + 1) + "/" + numBlocks + " => " + blockFolder.Files.Count + " files";
wrk.ReportProgress((int)((double)writeBlockIndex / numBlocks * 100.0));
}
Dictionary <RDAFile, ulong> dirEntryOffsets = new Dictionary <RDAFile, ulong>();
Dictionary <RDAFile, ulong> dirEntryCompressedSizes = new Dictionary <RDAFile, ulong>();
foreach (RDAFile file in blockFolder.Files)
{
byte[] dataToWrite = file.GetData();
if (compressBlock)
{
dataToWrite = ZLib.ZLib.Compress(dataToWrite);
}
dirEntryOffsets.Add(file, (ulong)writer.BaseStream.Position);
dirEntryCompressedSizes.Add(file, (ulong)dataToWrite.Length);
writer.Write(dataToWrite);
}
int dirEntrySize = (int)DirEntry.GetSize(version);
int decompressedDirEntriesSize = blockFolder.Files.Count * dirEntrySize;
byte[] decompressedDirEntries = new byte[decompressedDirEntriesSize];
for (int dirEntryIndex = 0; dirEntryIndex < blockFolder.Files.Count; ++dirEntryIndex)
{
RDAFile file = blockFolder.Files[dirEntryIndex];
DirEntry dirEntry = new DirEntry()
{
compressed = dirEntryCompressedSizes[file],
filesize = file.UncompressedSize,
filename = file.FileName,
timestamp = file.TimeStamp.ToTimeStamp(),
unknown = 0,
offset = dirEntryOffsets[file],
};
byte[] dirEntryBytes = CreateDirEntryBytes(dirEntry, version);
Buffer.BlockCopy(dirEntryBytes, 0, decompressedDirEntries, dirEntryIndex * dirEntrySize, dirEntrySize);
}
byte[] compressedDirEntries = compressBlock ? ZLib.ZLib.Compress(decompressedDirEntries) : decompressedDirEntries;
writer.Write(compressedDirEntries);
BlockInfo blockInfo = new BlockInfo()
{
flags = compressBlock ? 1u : 0u,
fileCount = (uint)blockFolder.Files.Count,
directorySize = (ulong)compressedDirEntries.Length,
decompressedSize = (ulong)decompressedDirEntriesSize,
nextBlock = 0, // will set this at the end of the next block
};
blockInfos[writeBlockIndex] = blockInfo;
blockInfoOffsets[writeBlockIndex] = (ulong)writer.BaseStream.Position;
if (writeBlockIndex > 0)
{
blockInfos[writeBlockIndex - 1].nextBlock = blockInfoOffsets[writeBlockIndex];
}
// we'll write the block info at the end, once we know the next block offset
writer.BaseStream.Position += BlockInfo.GetSize(version);
++writeBlockIndex;
}
// the last block gets nextBlockOffset after end of file
blockInfos[blockInfos.Length - 1].nextBlock = blockInfoOffsets[blockInfos.Length - 1] + BlockInfo.GetSize(version);
// now write all block infos
for (int index = 0; index < blockInfos.Length; ++index)
{
WriteBlockInfo(writer, blockInfoOffsets[index], blockInfos[index], version);
}
// now write the header
FileHeader fileHeader = FileHeader.Create(version);
fileHeader.firstBlockOffset = blockInfoOffsets[0];
WriteHeader(writer, 0, fileHeader, version);
fileStream.Close();
}