/// <summary>
/// Copies the contents of this span into another. The destination
/// must be at least as big as the source, and may be bigger.
/// </summary>
/// <param name="destination">The span to copy items into.</param>
public bool TryCopyTo(Span <T> destination)
{
// There are some benefits of making local copies. See https://github.com/dotnet/coreclr/issues/5556
var dest = destination;
var src = this;
if (src.Length > dest.Length)
{
return(false);
}
if (default(T) != null && MemoryUtils.IsPrimitiveValueType <T>())
{
UnsafeUtilities.CopyBlock(src.Object, src.Offset, dest.Object, dest.Offset,
src.Length * UnsafeUtilities.SizeOf <T>());
}
else
{
for (int i = 0; i < src.Length; i++)
{
// We don't check bounds here as we are surely within them
T value = UnsafeUtilities.Get <T>(src.Object, src.Offset, (UIntPtr)i);
UnsafeUtilities.Set(dest.Object, dest.Offset, (UIntPtr)i, value);
}
}
return(true);
}
/// <summary>
/// Fetches the element at the specified index.
/// </summary>
/// <exception cref="System.ArgumentOutOfRangeException">
/// Thrown when the specified index is not in range (<0 or >&eq;length).
/// </exception>
public T this[int index]
{
[MethodImpl(MethodImplOptions.AggressiveInlining)]
get
{
Contract.RequiresInRange(index, (uint)Length);
return(UnsafeUtilities.Get <T>(Object, Offset, (UIntPtr)index));
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
set
{
Contract.RequiresInRange(index, (uint)Length);
UnsafeUtilities.Set(Object, Offset, (UIntPtr)index, value);
}
}
/// <summary>
/// Copies the contents of this span into another. The destination
/// must be at least as big as the source, and may be bigger.
/// </summary>
/// <param name="destination">The span to copy items into.</param>
public void CopyTo(Span <T> destination)
{
// There are some benefits of making local copies. See https://github.com/dotnet/coreclr/issues/5556
var dest = destination;
var src = this;
Contract.Requires(src.Length <= dest.Length);
if (default(T) != null && MemoryUtils.IsPrimitiveValueType <T>())
{
// review: (#848) - overflow and alignment
UnsafeUtilities.CopyBlock(src.Object, src.Offset, dest.Object, dest.Offset,
src.Length * Unsafe.SizeOf <T>());
}
else
{
for (int i = 0; i < src.Length; i++)
{
// We don't check bounds here as we are surely within them
T value = UnsafeUtilities.Get <T>(src.Object, src.Offset, (UIntPtr)i);
UnsafeUtilities.Set(dest.Object, dest.Offset, (UIntPtr)i, value);
}
}
}
public static T Read <[Primitive] T>(this ReadOnlySpan <byte> slice)
where T : struct
{
Contract.RequiresInInclusiveRange(UnsafeUtilities.SizeOf <T>(), (uint)slice.Length);
return(UnsafeUtilities.Get <T>(slice.Object, slice.Offset, (UIntPtr)0));
}