/// <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)); }