public static CompressedBlob Compress(Compression method, ElementSizeStrategy elementSize, IList <int> uncompressedBlob)
{
switch (method)
{
case Compression.None:
return(new CompressedBlob(Compression.None, elementSize, elementSize, uncompressedBlob));
case Compression.CTB:
return(new CompressedBlob(Compression.CTB, elementSize, U8SizeStrategy.Instance, Collapse_CTB(uncompressedBlob).ToArray()));
case Compression.Simple:
return(new CompressedBlob(Compression.Simple, elementSize, elementSize, Collapse_Simple(elementSize.MaxValue, uncompressedBlob).ToArray()));
case Compression.Auto:
var tmp = Collapse_Simple(elementSize.MaxValue, uncompressedBlob);
if (tmp.Count < uncompressedBlob.Count)
{
return(new CompressedBlob(Compression.Simple, elementSize, elementSize, tmp));
}
else
{
return(new CompressedBlob(Compression.None, elementSize, elementSize, uncompressedBlob));
}
default:
throw new InvalidOperationException("Unrecognised compression method");
}
}
public static HelperMethod[] GetDecompressionMethods(Compression method, ElementSizeStrategy sizeStrategy, bool fromResource)
{
switch (method)
{
case Compression.Simple:
return(new HelperMethod[]
{
new MethodExpandSimple(sizeStrategy, fromResource),
});
case Compression.CTB:
return(new HelperMethod[]
{
new MethodExpandCTB(sizeStrategy, fromResource),
});
case Compression.None:
if (fromResource)
{
return(new HelperMethod[]
{
new MethodExtract(sizeStrategy),
});
}
else
{
return(Empty);
}
default: return(Empty);
}
}
CompressedBlob(Compression method, ElementSizeStrategy elementSize, ElementSizeStrategy blobSize, IList <int> blob)
{
Method = method;
ElementSize = elementSize;
BlobSize = blobSize;
_blob = new int[blob.Count];
blob.CopyTo(_blob, 0);
}
public MethodExpandSimple(ElementSizeStrategy sizeStrategy, bool fromResource)
{
_fromResource = fromResource;
_sizeStrategy = sizeStrategy;
}
public MethodExtract(ElementSizeStrategy sizeStrategy)
{
_sizeStrategy = sizeStrategy;
}
public static void WriteLargeIntArray(TextWriter writer, int indent, int wrap, IList <int> data, ElementSizeStrategy elementSize)
{
writer.Write("new ");
writer.Write(elementSize.Keyword);
writer.Write('[');
writer.Write(data.Count);
writer.WriteLine(']');
WriteIndent(writer, indent);
writer.Write('{');
var cutOff = 0;
for (var i = 0; i < data.Count; i++)
{
if (cutOff == 0)
{
writer.WriteLine();
WriteIndent(writer, indent + 1);
cutOff = wrap;
}
else
{
writer.Write(' ');
}
writer.Write(data[i]);
writer.Write(',');
cutOff--;
}
writer.WriteLine();
WriteIndent(writer, indent);
writer.Write('}');
}
