public static byte[] ToBytes(List <string> texts)
{
var writer = new DataWriter();
WriteTexts(writer, texts);
return(writer.ToArray());
}
public static void WriteJH(DataWriter writer, byte[] fileData, ushort encryptKey, bool additionalLobCompression, bool noHeader = false)
{
if (additionalLobCompression)
{
var lobWriter = new DataWriter();
WriteLob(lobWriter, fileData, (uint)FileType.LOB);
fileData = lobWriter.ToArray();
}
var encryptedData = Compression.JH.Crypt(fileData, encryptKey);
if (!noHeader)
{
uint header = (uint)FileType.JH | (uint)((ushort)((uint)FileType.JH >> 16) ^ encryptKey);
writer.Write(header);
}
writer.Write(encryptedData);
}
public static void WriteContainer(DataWriter writer, Dictionary <uint, byte[]> filesData, FileType fileType)
{
switch (fileType)
{
case FileType.AMNC:
case FileType.AMNP:
case FileType.AMBR:
case FileType.AMPC:
{
if (filesData.Count >= 0xffff) // -1 cause JH uses the 1-based index as a word
{
throw new AmbermoonException(ExceptionScope.Data, $"In a container file there can only be {0xffff-1} files at max.");
}
if (filesData.ContainsKey(0))
{
throw new AmbermoonException(ExceptionScope.Data, "The first file must have index 1 and not 0.");
}
var writerWithoutHeader = new DataWriter();
int totalFileNumber = (int)filesData.Keys.Max();
List <int> fileSizes = Enumerable.Repeat(0, totalFileNumber).ToList();
foreach (var file in filesData)
{
var fileData = file.Value;
int prevOffset = writerWithoutHeader.Position;
/*
* AMNC | Multiple file container (data uses [JH](JH.md) encoding). The C stands for "crypted". | 0x414d4e43 ('AMNC')
* AMNP | Multiple file container (data uses [JH](JH.md) encoding and the files are often [LOB](LOB.md) encoded in addition). The P stands for "packed". | 0x414d4e50 ('AMNP')
* AMBR | Multiple file container (no encryption). The R stands for "raw". | 0x414d4252 ('AMNR')
* AMPC | Another multiple file container (only compressed, not JH encrypted) | 0x414d5043 ('AMPC')
*/
if (fileType == FileType.AMNC)
{
WriteJH(writerWithoutHeader, fileData, (ushort)file.Key, false);
}
else if (fileType == FileType.AMBR)
{
writerWithoutHeader.Write(fileData);
}
else if (fileType == FileType.AMPC)
{
WriteLob(writerWithoutHeader, fileData);
}
else // AMNP
{
// this may be lob compressed if size is better
var lobWriter = new DataWriter();
WriteLob(lobWriter, fileData, (uint)FileType.LOB);
var data = lobWriter.Size - 4 < fileData.Length ? lobWriter.ToArray() : fileData;
bool lob = data != fileData;
// this is always JH encoded
var jhWriter = new DataWriter();
byte[] header = lob ? data.Take(8).ToArray() : new byte[4] {
0, 0, 0, 0
};
byte[] encodedData = lob ? data.Skip(8).ToArray() : data;
WriteJH(jhWriter, encodedData, (ushort)file.Key, false, true);
writerWithoutHeader.Write(header);
writerWithoutHeader.Write(encodedData);
}
fileSizes[(int)file.Key - 1] = writerWithoutHeader.Position - prevOffset;
}
writer.Write((uint)fileType);
writer.Write((ushort)totalFileNumber);
fileSizes.ForEach(fileSize => writer.Write((uint)fileSize));
writer.Write(writerWithoutHeader.ToArray());
}
break;
default:
throw new AmbermoonException(ExceptionScope.Data, $"File type '{fileType}' is no container format.");
}
}
