// Decodes a generalized (non-SZ/vector) array type represented by the element type followed by
// its rank and optional sizes and lower bounds.
private static TType DecodeArrayType <TType>(ref BlobReader blobReader, ISignatureTypeProvider <TType> provider)
{
TType elementType = DecodeType(ref blobReader, provider);
int rank = blobReader.ReadCompressedInteger();
var sizes = ImmutableArray <int> .Empty;
var lowerBounds = ImmutableArray <int> .Empty;
int sizesCount = blobReader.ReadCompressedInteger();
if (sizesCount > 0)
{
var array = new int[sizesCount];
for (int i = 0; i < sizesCount; i++)
{
array[i] = blobReader.ReadCompressedInteger();
}
sizes = ImmutableArray.Create(array);
}
int lowerBoundsCount = blobReader.ReadCompressedInteger();
if (lowerBoundsCount > 0)
{
var array = new int[lowerBoundsCount];
for (int i = 0; i < lowerBoundsCount; i++)
{
array[i] = blobReader.ReadCompressedSignedInteger();
}
lowerBounds = ImmutableArray.Create(array);
}
var arrayShape = new ArrayShape(rank, sizes, lowerBounds);
return(provider.GetArrayType(elementType, arrayShape));
}
private TType DecodeArrayType(ref BlobReader blobReader)
{
// PERF_TODO: Cache/reuse common case of small number of all-zero lower-bounds.
TType elementType = DecodeType(ref blobReader);
int rank = blobReader.ReadCompressedInteger();
var sizes = ImmutableArray<int>.Empty;
var lowerBounds = ImmutableArray<int>.Empty;
int sizesCount = blobReader.ReadCompressedInteger();
if (sizesCount > 0)
{
var builder = ImmutableArray.CreateBuilder<int>(sizesCount);
for (int i = 0; i < sizesCount; i++)
{
builder.Add(blobReader.ReadCompressedInteger());
}
sizes = builder.MoveToImmutable();
}
int lowerBoundsCount = blobReader.ReadCompressedInteger();
if (lowerBoundsCount > 0)
{
var builder = ImmutableArray.CreateBuilder<int>(lowerBoundsCount);
for (int i = 0; i < lowerBoundsCount; i++)
{
builder.Add(blobReader.ReadCompressedSignedInteger());
}
lowerBounds = builder.MoveToImmutable();
}
var arrayShape = new ArrayShape(rank, sizes, lowerBounds);
return _provider.GetArrayType(elementType, arrayShape);
}
public RoType GetArrayType(RoType elementType, ArrayShape shape) => _typeProvider.GetArrayType(elementType.SkipTypeWrappers(), shape);
