private void WriteVariant(Variant value)
{
switch (value.Kind)
{
case VariantKind.Null:
_writer.Write((byte)EncodingKind.Null);
break;
case VariantKind.Boolean:
_writer.Write((byte)(value.AsBoolean() ? EncodingKind.Boolean_True : EncodingKind.Boolean_False));
break;
case VariantKind.Byte:
_writer.Write((byte)EncodingKind.UInt8);
_writer.Write(value.AsByte());
break;
case VariantKind.SByte:
_writer.Write((byte)EncodingKind.Int8);
_writer.Write(value.AsSByte());
break;
case VariantKind.Int16:
_writer.Write((byte)EncodingKind.Int16);
_writer.Write(value.AsInt16());
break;
case VariantKind.UInt16:
_writer.Write((byte)EncodingKind.UInt16);
_writer.Write(value.AsUInt16());
break;
case VariantKind.Int32:
{
var v = value.AsInt32();
if (v >= 0 && v <= 10)
{
_writer.Write((byte)((int)EncodingKind.Int32_0 + v));
}
else if (v >= 0 && v < byte.MaxValue)
{
_writer.Write((byte)EncodingKind.Int32_1Byte);
_writer.Write((byte)v);
}
else if (v >= 0 && v < ushort.MaxValue)
{
_writer.Write((byte)EncodingKind.Int32_2Bytes);
_writer.Write((ushort)v);
}
else
{
_writer.Write((byte)EncodingKind.Int32);
_writer.Write(v);
}
}
break;
case VariantKind.UInt32:
{
var v = value.AsUInt32();
if (v >= 0 && v <= 10)
{
_writer.Write((byte)((int)EncodingKind.UInt32_0 + v));
}
else if (v >= 0 && v < byte.MaxValue)
{
_writer.Write((byte)EncodingKind.UInt32_1Byte);
_writer.Write((byte)v);
}
else if (v >= 0 && v < ushort.MaxValue)
{
_writer.Write((byte)EncodingKind.UInt32_2Bytes);
_writer.Write((ushort)v);
}
else
{
_writer.Write((byte)EncodingKind.UInt32);
_writer.Write(v);
}
}
break;
case VariantKind.Int64:
_writer.Write((byte)EncodingKind.Int64);
_writer.Write(value.AsInt64());
break;
case VariantKind.UInt64:
_writer.Write((byte)EncodingKind.UInt64);
_writer.Write(value.AsUInt64());
break;
case VariantKind.Decimal:
_writer.Write((byte)EncodingKind.Decimal);
_writer.Write(value.AsDecimal());
break;
case VariantKind.Float4:
_writer.Write((byte)EncodingKind.Float4);
_writer.Write(value.AsSingle());
break;
case VariantKind.Float8:
_writer.Write((byte)EncodingKind.Float8);
_writer.Write(value.AsDouble());
break;
case VariantKind.Char:
_writer.Write((byte)EncodingKind.Char);
_writer.Write((ushort)value.AsChar()); // written as ushort because BinaryWriter fails on chars that are unicode surrogates
break;
case VariantKind.String:
WriteStringValue(value.AsString());
break;
case VariantKind.BoxedEnum:
var e = value.AsBoxedEnum();
WriteBoxedEnum(e, e.GetType());
break;
case VariantKind.DateTime:
_writer.Write((byte)EncodingKind.DateTime);
_writer.Write(value.AsDateTime().ToBinary());
break;
case VariantKind.Type:
WriteType(value.AsType());
break;
case VariantKind.Array:
WriteArray(value.AsArray());
break;
case VariantKind.Object:
WriteObject(value.AsObject());
break;
}
}