/// <summary>
/// Try Get Encoded System String Type Marker
/// </summary>
/// <param name="utf8Span">The value.</param>
/// <param name="multiByteTypeMarker">The multi byte type marker if found.</param>
/// <returns>Whether or not the Encoded System String Type Marker was found.</returns>
private static bool TryGetEncodedSystemStringTypeMarker(
Utf8Span utf8Span,
out MultiByteTypeMarker multiByteTypeMarker)
{
if (JsonBinaryEncoding.TryGetSystemStringId(utf8Span, out int systemStringId))
{
multiByteTypeMarker = new MultiByteTypeMarker(
length: 1,
one: (byte)(TypeMarker.SystemString1ByteLengthMin + systemStringId));
return(true);
}
multiByteTypeMarker = default;
return(false);
}
/// <summary>
/// Try Get Encoded User String Type Marker
/// </summary>
/// <param name="utf8Span">The value.</param>
/// <param name="jsonStringDictionary">The optional json string dictionary.</param>
/// <param name="multiByteTypeMarker">The multi byte type marker if found.</param>
/// <returns>Whether or not the Encoded User String Type Marker was found.</returns>
private static bool TryGetEncodedUserStringTypeMarker(
Utf8Span utf8Span,
JsonStringDictionary jsonStringDictionary,
out MultiByteTypeMarker multiByteTypeMarker)
{
if (jsonStringDictionary == null)
{
multiByteTypeMarker = default;
return(false);
}
const int MinStringLength = 2;
const int MaxStringLength = 128;
if ((utf8Span.Length < MinStringLength) || (utf8Span.Length > MaxStringLength))
{
multiByteTypeMarker = default;
return(false);
}
const byte OneByteCount = TypeMarker.UserString1ByteLengthMax - TypeMarker.UserString1ByteLengthMin;
if (!jsonStringDictionary.TryAddString(utf8Span, out int index))
{
multiByteTypeMarker = default;
return(false);
}
// Convert the index to a multibyte type marker
if (index < OneByteCount)
{
multiByteTypeMarker = new MultiByteTypeMarker(
length: 1,
one: (byte)(TypeMarker.UserString1ByteLengthMin + index));
}
else
{
int twoByteOffset = index - OneByteCount;
multiByteTypeMarker = new MultiByteTypeMarker(
length: 2,
one: (byte)((twoByteOffset / 0xFF) + TypeMarker.UserString2ByteLengthMin),
two: (byte)(twoByteOffset % 0xFF));
}
return(true);
}
/// <summary>
/// Try Get Encoded String Type Marker
/// </summary>
/// <param name="utf8Span">the value</param>
/// <param name="jsonStringDictionary">The JSON string dictionary.</param>
/// <param name="multiByteTypeMarker">The encoded string type marker if found.</param>
/// <returns>Whether or not the type marker was found.</returns>
public static bool TryGetEncodedStringTypeMarker(
Utf8Span utf8Span,
JsonStringDictionary jsonStringDictionary,
out MultiByteTypeMarker multiByteTypeMarker)
{
if (JsonBinaryEncoding.TryGetEncodedSystemStringTypeMarker(utf8Span, out multiByteTypeMarker))
{
return(true);
}
if (JsonBinaryEncoding.TryGetEncodedUserStringTypeMarker(utf8Span, jsonStringDictionary, out multiByteTypeMarker))
{
return(true);
}
multiByteTypeMarker = default;
return(false);
}
