/// <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>())
{
PtrUtils.CopyBlock(src.Object, src.Offset, dest.Object, dest.Offset,
src.Length * PtrUtils.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 = PtrUtils.Get <T>(src.Object, src.Offset, (UIntPtr)i);
PtrUtils.Set(dest.Object, dest.Offset, (UIntPtr)i, value);
}
}
return(true);
}
/// <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);
}
}
}
/// <summary>
/// Determines whether two spans are equal (byte-wise) by comparing the elements by using memcmp
/// </summary>
/// <param name="first">A span of integers to compare to second.</param>
/// <param name="second">A span of integers T to compare to first.</param>
public static bool SequenceEqual(this Span <int> first, Span <int> second)
{
return(first.Length >= 256
? MemoryUtils.MemCmp(first, second)
: SequenceEqual <int>(first, second));
}
/// <summary>
/// Determines whether two read-only spans are equal (byte-wise) by comparing the elements by using memcmp
/// </summary>
/// <param name="first">A span of shorts to compare to second.</param>
/// <param name="second">A span of shorts T to compare to first.</param>
public static bool SequenceEqual(this ReadOnlySpan <short> first, ReadOnlySpan <short> second)
{
return(first.Length >= 512
? MemoryUtils.MemCmp(first, second)
: SequenceEqual <short>(first, second));
}
/// <summary>
/// Determines whether two spans are equal (byte-wise) by comparing the elements by using memcmp
/// </summary>
/// <param name="first">A span of characters to compare to second.</param>
/// <param name="second">A span of characters T to compare to first.</param>
public static bool SequenceEqual(this Span <char> first, Span <char> second)
{
return(first.Length >= 512
? MemoryUtils.MemCmp(first, second)
: SequenceEqual <char>(first, second));
}
/// <summary>
/// Determines whether two read-only spans are equal (byte-wise) by comparing the elements by using memcmp
/// </summary>
/// <param name="first">A span of bytes to compare to second.</param>
/// <param name="second">A span of bytes T to compare to first.</param>
public static bool SequenceEqual(this ReadOnlySpan <byte> first, ReadOnlySpan <byte> second)
{
return(first.Length >= 320
? MemoryUtils.MemCmp(first, second)
: SequenceEqual <byte>(first, second));
}
/// <summary>
/// Determines whether two read-only spans are equal (byte-wise) by comparing the elements by using memcmp
/// </summary>
/// <param name="first">A span of long integers to compare to second.</param>
/// <param name="second">A span of long integers T to compare to first.</param>
public static bool SequenceEqual(this ReadOnlySpan <long> first, ReadOnlySpan <long> second)
{
return(first.Length >= 256
? MemoryUtils.MemCmp(first, second)
: SequenceEqual <long>(first, second));
}
