Add Encoding Span-based APIs #22854
Description
Separated out of https://github.com/dotnet/corefx/issues/21281 for tracking purposes.
- Implement in System.Private.CoreLib in coreclr ("shared" with corert)
- Expose from System.Text.Encoding contract in corefx
- Add tests to System.Text.Encoding tests in corefx
namespace System.Text
{
public class Encoding
{
public virtual int GetByteCount(ReadOnlySpan<char> chars);
public virtual int GetBytes(ReadOnlySpan<char> chars, Span<byte> bytes);
public virtual int GetCharCount(ReadOnlySpan<byte> bytes);
public virtual int GetChars(ReadOnlySpan<byte> bytes, Span<char> chars);
public string GetString(ReadOnlySpan<byte> bytes);
public virtual ReadOnlySpan<byte> Preamble { get; }
…
}
}