internal void Read(Cardfile file, string filePath, out bool compressed)
{
using (FileStream fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read))
using (SeekableBinaryReader reader = new SeekableBinaryReader(fileStream, encoding, true))
{
// magic number
string magicNum = encoding.GetString(reader.ReadBytes(4));
if (magicNum != "CFDN")
{
throw new ArgumentException("Not a valid .CRDX file!");
}
uint version = reader.ReadUInt32();
if (version == 0 || version > 1)
{
throw new ArgumentException("Incompatible .CRDX file version!");
}
uint compression = reader.ReadUInt32();
reader.ReadUInt64(); // file size
if (compression == 0)
{
// uncompressed
ReadData(file, reader);
compressed = false;
}
else if (compression == 1)
{
// compressed GZIP
long oldPos = fileStream.Position;
using (GZipStream compressionStream = new GZipStream(fileStream, CompressionMode.Decompress))
using (MemoryStream tmp = new MemoryStream())
{
tmp.Seek(oldPos, SeekOrigin.Begin);
compressionStream.CopyTo(tmp);
tmp.Flush();
tmp.Seek(oldPos, SeekOrigin.Begin);
using (SeekableBinaryReader memReader = new SeekableBinaryReader(tmp))
{
ReadData(file, memReader);
}
}
compressed = true;
}
else
{
throw new ArgumentException("Incompatible .CRDX file compression!");
}
}
}
private void ReadData(Cardfile file, SeekableBinaryReader reader)
{
uint cardCount = reader.ReadUInt32();
uint cardIndex = reader.ReadUInt32();
reader.Skip(20);
if (cardIndex > cardCount)
{
throw new ArgumentException("Not a valid .CRDX file!");
}
else if (cardIndex == cardCount)
{
file.FrontIndex = -1;
}
for (int i = 0; i < cardCount; ++i)
{
long textOffset = reader.ReadInt64();
long fileOffset = reader.ReadInt64();
reader.Skip(12);
uint indexLength = reader.ReadUInt32();
string index = encoding.GetString(reader.ReadBytes((int)indexLength));
long oldPosition = reader.Position;
Card newCard = new Card(index);
reader.Seek(textOffset, SeekOrigin.Begin);
ulong textLength = reader.ReadUInt64();
byte[] buffer = reader.ReadBytes((int)textLength);
newCard.Contents = encoding.GetString(buffer);
if (fileOffset >= 0)
{
reader.Seek(fileOffset, SeekOrigin.Begin);
uint nameLength = reader.ReadUInt32();
byte[] nameData = reader.ReadBytes((int)nameLength);
uint mimeLength = reader.ReadUInt32();
byte[] mimeData = reader.ReadBytes((int)mimeLength);
ulong attachmentLength = reader.ReadUInt64();
byte[] attachmentData = reader.ReadBytes((int)textLength);
AttachmentFile attachment = new AttachmentFile(encoding.GetString(nameData), encoding.GetString(mimeData), attachmentData);
newCard.Attachment = attachment;
}
file.AddCard(newCard);
reader.Seek(oldPosition, SeekOrigin.Begin);
}
file.FrontIndex = (int)cardIndex;
}