private static async ValueTask <Int32> PerformWriteJSONTTokenAsync(
StreamWriterWithResizableBuffer stream,
IEncodingInfo encoding,
JToken jsonValue
)
{
ArgumentValidator.ValidateNotNull(nameof(jsonValue), jsonValue);
Int32 bytesWritten;
var asciiSize = encoding.BytesPerASCIICharacter;
Int32 max;
(Int32 Offset, Int32 Count)range;
switch (jsonValue)
{
case JArray array:
range = stream.ReserveBufferSegment(asciiSize);
encoding.WriteASCIIByte(stream.Buffer, ref range.Offset, (Byte)ARRAY_START);
bytesWritten = range.Count;
max = array.Count;
if (max > 0)
{
for (var i = 0; i < max; ++i)
{
bytesWritten += await PerformWriteJSONTTokenAsync(stream, encoding, array[i]);
if (i < max - 1)
{
range = stream.ReserveBufferSegment(asciiSize);
encoding.WriteASCIIByte(stream.Buffer, ref range.Offset, (Byte)ARRAY_VALUE_DELIM);
bytesWritten += range.Count;
}
}
}
range = stream.ReserveBufferSegment(asciiSize);
encoding.WriteASCIIByte(stream.Buffer, ref range.Offset, (Byte)ARRAY_END);
bytesWritten += await stream.FlushAsync();
break;
case JObject obj:
range = stream.ReserveBufferSegment(asciiSize);
encoding.WriteASCIIByte(stream.Buffer, ref range.Offset, (Byte)OBJ_START);
bytesWritten = range.Count;
max = obj.Count;
if (max > 0)
{
var j = 0;
foreach (var kvp in obj)
{
bytesWritten += WriteJSONString(stream, encoding, kvp.Key);
range = stream.ReserveBufferSegment(asciiSize);
encoding.WriteASCIIByte(stream.Buffer, ref range.Offset, (Byte)OBJ_KEY_VALUE_DELIM);
bytesWritten += range.Count;
await stream.FlushAsync();
bytesWritten += await PerformWriteJSONTTokenAsync(stream, encoding, kvp.Value);
if (++j < max)
{
range = stream.ReserveBufferSegment(asciiSize);
encoding.WriteASCIIByte(stream.Buffer, ref range.Offset, (Byte)OBJ_VALUE_DELIM);
bytesWritten += range.Count;
}
}
}
range = stream.ReserveBufferSegment(asciiSize);
encoding.WriteASCIIByte(stream.Buffer, ref range.Offset, (Byte)OBJ_END);
bytesWritten += await stream.FlushAsync();
break;
case JValue value:
var val = value.Value;
switch (val)
{
case String str:
bytesWritten = WriteJSONString(stream, encoding, str);
break;
case Boolean boolean:
// Write 'true' or 'false'
range = stream.ReserveBufferSegment(boolean ? 4 : 5);
encoding.WriteString(stream.Buffer, ref range.Offset, boolean ? "true" : "false");
bytesWritten = range.Count;
break;
case Int64 i64:
range = stream.ReserveBufferSegment(encoding.GetTextualIntegerRepresentationSize(i64));
encoding.WriteIntegerTextual(stream.Buffer, ref range.Offset, i64);
bytesWritten = range.Count;
break;
case Double dbl:
// Have to allocate string :/
var dblStr = dbl.ToString(System.Globalization.CultureInfo.InvariantCulture);
range = stream.ReserveBufferSegment(encoding.Encoding.GetByteCount(dblStr));
encoding.WriteString(stream.Buffer, ref range.Offset, dblStr);
bytesWritten = range.Count;
break;
case null:
// Write 'null'
range = stream.ReserveBufferSegment(asciiSize * 4);
encoding.WriteString(stream.Buffer, ref range.Offset, "null");
bytesWritten = range.Count;
break;
default:
throw new NotSupportedException($"Unsupported primitive value {val}.");
}
// Remember to flush stream
await stream.FlushAsync();
break;
default:
throw new NotSupportedException($"Unrecognized JToken type: {jsonValue?.GetType()}.");
}
return(bytesWritten);
}
private static Int32 PerformCalculateJTokenTextSize(IEncodingInfo encoding, JToken jsonValue)
{
ArgumentValidator.ValidateNotNull(nameof(jsonValue), jsonValue);
var asciiSize = encoding.BytesPerASCIICharacter;
Int32 retVal;
switch (jsonValue)
{
case JArray array:
// '['followed by items with ',' in between them followed by ']'
retVal = (2 + Math.Max(array.Count - 1, 0)) * asciiSize + array.Aggregate(0, (cur, curToken) => cur + PerformCalculateJTokenTextSize(encoding, curToken));
break;
case JObject obj:
// '{' followed by items with ',' in between them followed by '}'
// Each item has ':' between key and value
retVal = (2 + Math.Max(obj.Count - 1, 0)) * asciiSize + Enumerable.Aggregate <KeyValuePair <String, JToken>, Int32>(obj, 0, (cur, curKvp) => cur + asciiSize + CalculateJSONStringValueSize(curKvp.Key, encoding) + PerformCalculateJTokenTextSize(encoding, curKvp.Value));
break;
case JValue simple:
var val = simple.Value;
switch (val)
{
case String str:
retVal = CalculateJSONStringValueSize(str, encoding);
break;
case Boolean bol:
retVal = (bol ? 4 : 5) * asciiSize;
break;
case Byte b:
case SByte sb:
case Int16 i16:
case UInt16 u16:
case Int32 i32:
case UInt32 u32:
case Int64 i64:
retVal = encoding.GetTextualIntegerRepresentationSize((Int64)Convert.ChangeType(val, typeof(Int64)));
break;
// TODO UInt64
case Single s:
case Double d:
case Decimal dec:
retVal = encoding.Encoding.GetByteCount(((IFormattable)val).ToString(null, System.Globalization.CultureInfo.InvariantCulture.NumberFormat));
break;
case null:
// Word 'null' has 4 ascii characters
retVal = 4 * asciiSize;
break;
default:
throw new NotSupportedException($"Unsupported primitive value {val}.");
}
break;
default:
throw new NotSupportedException($"Unrecognized JToken type: {jsonValue?.GetType()}.");
}
return(retVal);
}
