public void AsBytes_FromUtf8String()
{
Assert.True(default(ReadOnlySpan <byte>) == ((Utf8String)null).AsBytes());
Utf8String theString = u8("Hello");
Assert.True(MemoryMarshal.CreateReadOnlySpan(ref Unsafe.AsRef(in theString.GetPinnableReference()), 5) == theString.AsBytes());
}
public void AsBytes_FromSpan_Default_netcoreapp()
{
// a span wrapping data should become a span wrapping that same data.
Utf8String theString = u8("Hello");
Assert.True(MemoryMarshal.CreateReadOnlySpan(ref Unsafe.AsRef(in theString.GetPinnableReference()), 5) == (theString.AsMemory().Span).AsBytes());
}
public void AsSpan_FromUtf8String()
{
Assert.True(((Utf8String)null).AsSpan().Bytes == default); // referential equality check
Utf8String theString = u8("Hello");
Assert.True(Unsafe.AreSame(ref Unsafe.AsRef(in theString.GetPinnableReference()), ref Unsafe.AsRef(in theString.AsSpan().GetPinnableReference())));
Assert.Equal(5, theString.AsSpan().Bytes.Length);
}
private static void AssertSameAsEmpty(Utf8String value)
{
#if NETFRAMEWORK
// When OOB, we can't change the actual object returned from a constructor.
// So just assert the underlying "_bytes" is the same.
Assert.Equal(0, value.Length);
Assert.True(Unsafe.AreSame(
ref Unsafe.AsRef(in Utf8String.Empty.GetPinnableReference()),
ref Unsafe.AsRef(in value.GetPinnableReference())));
#else
Assert.Same(Utf8String.Empty, value);
#endif
}
public unsafe void AsBytes_FromSpan_Default()
{
// First, a default span should become a default span.
Assert.True(default(ReadOnlySpan <byte>) == new ReadOnlySpan <Char8>().AsBytes());
// Next, an empty but non-default span should become an empty but non-default span.
Assert.True(new ReadOnlySpan <byte>((void *)0x12345, 0) == new ReadOnlySpan <Char8>((void *)0x12345, 0).AsBytes());
// Finally, a span wrapping data should become a span wrapping that same data.
Utf8String theString = u8("Hello");
Assert.True(MemoryMarshal.CreateReadOnlySpan(ref Unsafe.AsRef(in theString.GetPinnableReference()), 5) == ((ReadOnlySpan <Char8>)theString).AsBytes());
}
public static unsafe void ReadOnlyMemoryOfByte_WithUtf8String_Pin()
{
Utf8String theString = u8("Hello");
ReadOnlyMemory <byte> rom = theString.AsMemoryBytes();
MemoryHandle memHandle = default;
try
{
memHandle = rom.Pin();
Assert.True(memHandle.Pointer == Unsafe.AsPointer(ref Unsafe.AsRef(in theString.GetPinnableReference())));
}
finally
{
memHandle.Dispose();
}
}
private static IEnumerable <Utf8String> SplitIntoWords(Utf8String text)
{
int startIndex = 0;
while (true)
{
var span = MemoryMarshal.CreateReadOnlySpan(ref Unsafe.Add(ref Unsafe.AsRef <byte>(in text.GetPinnableReference()), startIndex), text.Length - startIndex);
int indexOfSpace = span.IndexOf((byte)' ');
if (indexOfSpace < 0)
{
yield return(text.Substring(startIndex).Trim()); // return last of the text
yield break;
}
yield return(text.Substring(startIndex, indexOfSpace).Trim());
startIndex += indexOfSpace + 1; // we know we can skip over a space character
}
}
public void AsMemory_FromUtf8String()
{
Assert.True(default(ReadOnlyMemory <Char8>).Equals(((Utf8String)null).AsMemory()));
Utf8String theString = u8("Hello");
Assert.True(MemoryMarshal.CreateReadOnlySpan(ref Unsafe.As <byte, Char8>(ref Unsafe.AsRef(in theString.GetPinnableReference())), 5) == theString.AsMemory().Span);
}
public void AsBytes_FromUtf8String_netcoreapp()
{
Utf8String theString = u8("Hello");
Assert.True(MemoryMarshal.CreateReadOnlySpan(ref Unsafe.AsRef(in theString.GetPinnableReference()), 5) == theString.AsBytes());
}
public unsafe static void MemoryOfChar8_WithUtf8String_Pin()
{
Utf8String theString = u8("Hello");
ReadOnlyMemory <Char8> rom = theString.AsMemory();
MemoryHandle memHandle = default;
try
{
memHandle = Unsafe.As <ReadOnlyMemory <Char8>, Memory <Char8> >(ref rom).Pin();
Assert.True(memHandle.Pointer == Unsafe.AsPointer(ref Unsafe.AsRef(in theString.GetPinnableReference())));
}
finally
{
memHandle.Dispose();
}
}
