/// <summary>
/// Read a <see cref="Request.EvaluationResult"/> request
/// </summary>
/// <param name="from">Origin</param>
/// <param name="expression">Expression</param>
/// <param name="result">Evaluation result</param>
/// <returns>Number of bytes read</returns>
public static int ReadEvaluationResult(ReadOnlySpan <byte> from, out string expression, out object result)
{
EvaluationResultHeader header = MemoryMarshal.Read <EvaluationResultHeader>(from);
int bytesRead = Marshal.SizeOf <EvaluationResultHeader>();
// Read expression
ReadOnlySpan <byte> unicodeExpression = from.Slice(bytesRead, header.ExpressionLength);
expression = Encoding.UTF8.GetString(unicodeExpression);
bytesRead += header.ExpressionLength;
// Read value
switch (header.Type)
{
case DataType.Int:
result = header.IntValue;
break;
case DataType.UInt:
result = header.UIntValue;
break;
case DataType.Float:
result = header.FloatValue;
break;
case DataType.IntArray:
int[] intArray = new int[header.IntValue];
for (int i = 0; i < header.IntValue; i++)
{
intArray[i] = MemoryMarshal.Read <int>(from[bytesRead..]);
/// <summary>
/// Read a <see cref="Request.EvaluationResult"/> request
/// </summary>
/// <param name="from">Origin</param>
/// <param name="expression">Expression</param>
/// <param name="result">Evaluation result</param>
/// <returns>Number of bytes read</returns>
public static int ReadEvaluationResult(ReadOnlySpan <byte> from, out string expression, out object result)
{
EvaluationResultHeader header = MemoryMarshal.Cast <byte, EvaluationResultHeader>(from)[0];
int bytesRead = Marshal.SizeOf(header);
// Read expression
ReadOnlySpan <byte> unicodeExpression = from.Slice(bytesRead, header.ExpressionLength);
expression = Encoding.UTF8.GetString(unicodeExpression);
bytesRead += header.ExpressionLength;
// Read value
switch (header.Type)
{
case DataType.Int:
result = header.IntValue;
break;
case DataType.UInt:
result = header.UIntValue;
break;
case DataType.Float:
result = header.FloatValue;
break;
case DataType.IntArray:
int[] intArray = new int[header.IntValue];
for (int i = 0; i < header.IntValue; i++)
{
intArray[i] = MemoryMarshal.Read <int>(from.Slice(bytesRead));
bytesRead += Marshal.SizeOf <int>();
}
result = intArray;
break;
case DataType.UIntArray:
uint[] uintArray = new uint[header.IntValue];
for (int i = 0; i < header.IntValue; i++)
{
uintArray[i] = MemoryMarshal.Read <uint>(from.Slice(bytesRead));
bytesRead += Marshal.SizeOf <uint>();
}
result = uintArray;
break;
case DataType.FloatArray:
float[] floatArray = new float[header.IntValue];
for (int i = 0; i < header.IntValue; i++)
{
floatArray[i] = MemoryMarshal.Read <float>(from.Slice(bytesRead));
bytesRead += Marshal.SizeOf <float>();
}
result = floatArray;
break;
case DataType.String:
result = Encoding.UTF8.GetString(from.Slice(bytesRead, header.IntValue));
bytesRead += header.IntValue;
break;
case DataType.DriverId:
result = new DriverId(header.UIntValue);
break;
case DataType.DriverIdArray:
DriverId[] driverIdArray = new DriverId[header.IntValue];
for (int i = 0; i < header.IntValue; i++)
{
driverIdArray[i] = new DriverId(MemoryMarshal.Read <uint>(from.Slice(bytesRead)));
bytesRead += Marshal.SizeOf <uint>();
}
result = driverIdArray;
break;
case DataType.Bool:
result = Convert.ToBoolean(header.IntValue);
break;
case DataType.BoolArray:
bool[] boolArray = new bool[header.IntValue];
for (int i = 0; i < header.IntValue; i++)
{
boolArray[i] = Convert.ToBoolean(MemoryMarshal.Read <byte>(from.Slice(bytesRead)));
bytesRead += Marshal.SizeOf <byte>();
}
result = boolArray;
break;
case DataType.Expression:
string errorMessage = Encoding.UTF8.GetString(from.Slice(bytesRead, header.IntValue));
result = new CodeParserException(errorMessage);
break;
default:
result = null;
break;
}
return(AddPadding(bytesRead));
}