/// <summary>
/// Recalculates the information for all WEM identities.
/// </summary>
private void RecalculateAllIdentities()
{
uint currentOffset = 0;
for (int idx = 0; idx < WEMFilesInternal.Length; idx++)
{
WEMFile file = WEMFilesInternal[idx];
IdentitiesInternal[idx] = new WEMFileIdentity {
WemID = file.ID,
Offset = currentOffset,
Size = (uint)file.Data.Length
};
currentOffset += (uint)file.Data.Length;
// Offset seems to be bound to the closest multiple of 4 byte, (e.g. if the length is 7, offset will be bumped up to 8 and the remaining space assumed to be null.)
currentOffset = RoundToNearestMultOf4(currentOffset);
}
}
/// <summary>
/// Construct a new WEM Marshaller from a list of identities and the condensed byte array of every included WEM file.
/// </summary>
/// <param name="identities">The identity array.</param>
/// <param name="condensedWEMFileArray">The WEM file identity.</param>
public WEMMarshaller(WEMFileIdentity[] identities, byte[] condensedWEMFileArray)
{
IdentitiesInternal = identities;
RawAllWEMFilesInternal = condensedWEMFileArray;
WEMFilesInternal = new WEMFile[identities.Length];
// Convert the byte array to the list.
List <byte> wemFileList = condensedWEMFileArray.ToList();
for (int idx = 0; idx < identities.Length; idx++)
{
WEMFileIdentity identity = identities[idx];
// FastSkip is a custom implementation of Skip optimized exclusively for List types. Compared to stock usage of Skip, FastSkip offers a >500% speed increase.
// See ArrayUtil.FastSkip for credits.
byte[] data = wemFileList.FastSkip((int)identity.Offset).Take((int)identity.Size).ToArray();
WEMFilesInternal[idx] = new WEMFile()
{
ID = identity.WemID,
Data = data
};
}
}
/// <summary>
/// Gets a WEM file by identity, or null if it doesn't exist.
/// </summary>
/// <param name="identity">The file identity.</param>
/// <returns></returns>
public WEMFile GetWemFile(WEMFileIdentity identity)
{
return(GetWemFile(identity.WemID));
}
