static void SubViewAccess(ArrayView <int> view)
{
// Creates a sub view that represents a view from index 10 to view.Length - 1
var subView = view.GetSubView(10);
Debug.Assert(subView.Length == view.Length - 10);
// Write value to sub view and output value
subView[0] = 42;
Console.WriteLine($"Value of sub view at index 0: {subView[0]} = value of view at index 10: {view[10]}");
// Creates a sub view that represents a view from index 10 with length 20
// (up to index 10 + 20)
var subView2 = view.GetSubView(10, 20);
Debug.Assert(subView2.Length == 20);
Console.WriteLine($"Value of sub view 2 at index 0: {subView2[0]} = value of view at index 10: {view[10]}");
// Creates a sub view that represents a view from index 20 with length 2
var subView3 = subView2.GetSubView(10, 2);
subView3[1] = 23;
// An access of the form subView3[2] will trigger an OutOfBounds assertion
Debug.Assert(subView3.Length == 2);
Console.WriteLine($"Value of sub view 3 at index 1: {subView3[1]} = value of view at index 21: {view[21]}");
}
internal static void ArrayViewVectorizedIOKernel <T, T2>(
Index1 index,
ArrayView <T> source,
ArrayView <T> target)
where T : unmanaged
where T2 : unmanaged
{
// Use compile-time known offsets to test the internal alignment rules
var nonVectorAlignedSource = source.GetSubView(1, 2);
var nonVectorAlignedCastedSource = nonVectorAlignedSource.Cast <T2>();
var nonVectorAlignedTarget = target.GetSubView(1, 2);
var nonVectorAlignedTargetCasted = nonVectorAlignedTarget.Cast <T2>();
// Load from source and write to target
T2 data = nonVectorAlignedCastedSource[index];
nonVectorAlignedTargetCasted[index] = data;
// Perform the same operations with compile-time known offsets
var vectorAlignedSource = source.GetSubView(2, 2);
var vectorAlignedCastedSource = vectorAlignedSource.Cast <T2>();
var vectorAlignedTarget = target.GetSubView(2, 2);
var vectorAlignedTargetCasted = vectorAlignedTarget.Cast <T2>();
// Load from source and write to target
T2 data2 = vectorAlignedCastedSource[index];
vectorAlignedTargetCasted[index] = data2;
}
internal static void ArrayViewGetSubViewImplicitLengthKernel(
Index1 index,
ArrayView <int> length,
ArrayView <int> source,
int subViewOffset)
{
var subView = source.GetSubView(subViewOffset);
length[index] = subView.IntLength;
}
internal static void ArrayViewGetSubViewKernel(
Index1 index,
ArrayView <int> data,
ArrayView <int> length,
ArrayView <int> source,
int subViewOffset,
int subViewLength)
{
var subView = source.GetSubView(subViewOffset, subViewLength);
data[index] = subView[0];
length[index] = subView.IntLength;
}
/// <summary>
/// Returns a sub segment of an existing segment.
/// </summary>
public BinaryStringSegment Subsegment(int index, int length)
{
return(m_isAscii
? new BinaryStringSegment(m_value.GetSubView(index, length), m_isAscii)
: new BinaryStringSegment(m_value.GetSubView(index * 2, length * 2), m_isAscii));
}
public PipDataEntryList GetSubView(int index)
{
return(new PipDataEntryList(m_bytes.GetSubView(index * PipDataEntry.BinarySize)));
}
