/// <summary>
/// Read the given resource as byte array
/// </summary>
/// <param name="re">resource entry</param>
/// <returns>array of bytes or <see langword="null"/> if no such resource is found</returns>
public byte[] GetBytes(ResourceEntry re)
{
byte[] result = null;
using (var stream = Open(re))
if (stream != null)
{
if (!(stream is MemoryStream mem))
{
mem = new MemoryStream();
stream.CopyTo(mem);
}
result = mem.ToArray();
}
return(result);
}
/// <summary>
/// Open the given resource entry as a readable stream
/// </summary>
/// <param name="entry">resource entry</param>
/// <returns>readable stream or <see langword="null"/> if no such resource is found</returns>
public Stream Open(ResourceEntry entry)
{
if (entry == null)
{
return(null);
}
var stream = Assembly.GetManifestResourceStream(entry.ResourceName);
if (entry.Encryption != null && int.TryParse(entry.Compression, out var rid))
{
var ct = Assembly.ManifestModule.ResolveType(rid);
var decryptor = (IDecryptor)Activator.CreateInstance(ct);
stream = decryptor.Decrypt(stream);
}
if (entry.Compression != null && int.TryParse(entry.Compression, out rid))
{
var ct = Assembly.ManifestModule.ResolveType(rid);
var decompressor = (IDecompressor)Activator.CreateInstance(ct);
stream = decompressor.Decompress(stream);
}
return(stream);
}
private static ResourceReader TryCreate(string name, Assembly ass)
{
var names = new HashSet <string>(ass.GetManifestResourceNames());
if (!names.Contains(name))
{
return(null);
}
using (var stream = ass.GetManifestResourceStream(name))
if (stream != null)
{
var root = XDocument.Load(stream)?.Root;
if (root?.Name != "index")
{
return(null);
}
var entries = new List <ResourceEntry>();
foreach (var node in root.Elements("entry"))
{
var entry = new ResourceEntry();
foreach (var attr in node.Attributes())
{
entry[attr.Name.LocalName] = attr.Value;
}
if (entry.ResourceName != null && entry.Name != null && names.Contains(name))
{
entries.Add(entry);
}
}
if (entries.Count > 0)
{
return(new ResourceReader(name, ass, entries));
}
}
return(null);
}
