/// <summary>Reads the next data item as a single-precision floating point number (major type 7).</summary>
/// <returns>The decoded value.</returns>
/// <exception cref="InvalidOperationException"><para>The next data item does not have the correct major type.</para>
/// <para>-or-</para>
/// <para>The next simple value is not a floating-point number encoding.</para>
/// <para>-or-</para>
/// <para>The encoded value is a double-precision float.</para></exception>
/// <exception cref="CborContentException"><para>The next value has an invalid CBOR encoding.</para>
/// <para>-or-</para>
/// <para>There was an unexpected end of CBOR encoding data.</para>
/// <para>-or-</para>
/// <para>The next value uses a CBOR encoding that is not valid under the current conformance mode.</para></exception>
public float ReadSingle()
{
CborInitialByte header = PeekInitialByte(expectedType: CborMajorType.Simple);
ReadOnlySpan <byte> buffer = GetRemainingBytes();
float result;
switch (header.AdditionalInfo)
{
case CborAdditionalInfo.Additional16BitData:
EnsureReadCapacity(buffer, 1 + sizeof(ushort));
result = HalfHelpers.HalfToFloat(CborHelpers.ReadHalfBigEndian(buffer.Slice(1)));
AdvanceBuffer(1 + sizeof(ushort));
AdvanceDataItemCounters();
return(result);
case CborAdditionalInfo.Additional32BitData:
EnsureReadCapacity(buffer, 1 + sizeof(float));
result = CborHelpers.ReadSingleBigEndian(buffer.Slice(1));
AdvanceBuffer(1 + sizeof(float));
AdvanceDataItemCounters();
return(result);
case CborAdditionalInfo.Additional64BitData:
throw new InvalidOperationException(SR.Cbor_Reader_ReadingAsLowerPrecision);
default:
throw new InvalidOperationException(SR.Cbor_Reader_NotAFloatEncoding);
}
}
internal static bool TryConvertSingleToHalf(float value, out ushort result)
{
result = HalfHelpers.FloatToHalf(value);
return(CborHelpers.SingleToInt32Bits(HalfHelpers.HalfToFloat(result)) == CborHelpers.SingleToInt32Bits(value));
}
