// Writes a scalar value as a percent-encoded sequence of UTF8 bytes, per RFC 3987.
protected override void WriteEncodedScalar(ref Writer writer, uint value)
{
uint asUtf8 = (uint)UnicodeHelpers.GetUtf8RepresentationForScalarValue(value);
do
{
char highNibble, lowNibble;
HexUtil.WriteHexEncodedByte((byte)asUtf8, out highNibble, out lowNibble);
writer.Write('%');
writer.Write(highNibble);
writer.Write(lowNibble);
} while ((asUtf8 >>= 8) != 0);
}
public void GetUtf8RepresentationForScalarValue()
{
for (int i = 0; i <= 0x10FFFF; i++)
{
if (i <= 0xFFFF && Char.IsSurrogate((char)i))
{
continue; // no surrogates
}
// Arrange
byte[] expectedUtf8Bytes = _utf8EncodingThrowOnInvalidBytes.GetBytes(Char.ConvertFromUtf32(i));
// Act
List <byte> actualUtf8Bytes = new List <byte>(4);
uint asUtf8 = (uint)UnicodeHelpers.GetUtf8RepresentationForScalarValue((uint)i);
do
{
actualUtf8Bytes.Add((byte)asUtf8);
} while ((asUtf8 >>= 8) != 0);
// Assert
Assert.Equal(expectedUtf8Bytes, actualUtf8Bytes);
}
}