public void Ctor_EmptyByDefault()
{
// Act
var byteMap = new AsciiByteMap();
// Assert
for (int i = 0; i < 128; i++)
{
Assert.False(byteMap.TryLookup(new Rune(i), out _));
}
}
// Writes a scalar value as a JavaScript-escaped character (or sequence of characters).
// See ECMA-262, Sec. 7.8.4, and ECMA-404, Sec. 9
// https://www.ecma-international.org/ecma-262/5.1/#sec-7.8.4
// https://www.ecma-international.org/publications/files/ECMA-ST/ECMA-404.pdf
//
// ECMA-262 allows encoding U+000B as "\v", but ECMA-404 does not.
// Both ECMA-262 and ECMA-404 allow encoding U+002F SOLIDUS as "\/"
// (in ECMA-262 this character is a NonEscape character); however, we
// don't encode SOLIDUS by default unless the caller has provided an
// explicit bitmap which does not contain it. In this case we'll assume
// that the caller didn't want a SOLIDUS written to the output at all,
// so it should be written using "\u002F" encoding.
// HTML-specific characters (including apostrophe and quotes) will
// be written out as numeric entities for defense-in-depth.
internal override int EncodeUtf8(Rune value, Span <byte> destination)
{
if (_preescapedMap.TryLookup(value, out byte preescapedForm))
{
if (!SpanUtility.IsValidIndex(destination, 1))
{
goto OutOfSpace;
}
destination[0] = (byte)'\\';
destination[1] = preescapedForm;
return(2);
OutOfSpace:
return(-1);
}
return(TryEncodeScalarAsHex(this, value, destination));