//-------------------- // /// <summary> /// Gets the list of <see cref="T:InTheHand.Net.Bluetooth.LanguageBaseItem"/> /// items in the service record. /// </summary> /// - /// <param name="elementSequence"> /// A <see cref="T:InTheHand.Net.Bluetooth.ServiceElement"/> holding the /// data from the /// <see cref="F:InTheHand.Net.Bluetooth.AttributeIds.UniversalAttributeId.LanguageBaseAttributeIdList"/> /// attribute. /// </param> /// - /// <returns> /// An array of <see cref="T:InTheHand.Net.Bluetooth.LanguageBaseItem"/>. /// An array length zero is returned if the service record contains no such attribute. /// </returns> /// - /// <exception cref="T:System.ArgumentException"> /// <paramref name="elementSequence"/> is not of type /// <see cref="F:InTheHand.Net.Bluetooth.ElementType.ElementSequence"/>. /// </exception> /// <exception cref="T:System.Net.ProtocolViolationException"> /// The element sequence contains incorrectly formatted or invalid content, /// for example it contains the wrong element data types, or doesn't contain /// the elements in groups of three as required. /// </exception> public static LanguageBaseItem[] ParseListFromElementSequence(ServiceElement elementSequence) { if (elementSequence.ElementType != ElementType.ElementSequence) { throw new ArgumentException(ErrorMsgLangBaseListParseNotSequence); } #if V1 IList elementList = elementSequence.GetValueAsElementList(); #else IList <ServiceElement> elementList = elementSequence.GetValueAsElementList(); #endif int numElements = elementList.Count; const int ElementsPerItem = 3; if (numElements == 0 || (numElements % ElementsPerItem) != 0) { throw new System.Net.ProtocolViolationException(ErrorMsgLangBaseListParseNotInThrees); } int numItems = numElements / ElementsPerItem; LanguageBaseItem[] items = new LanguageBaseItem[numItems]; for (int i = 0; i < numItems; ++i) { // Casts are for the non-Generic version. ServiceElement e1Lang = elementList[i * ElementsPerItem]; ServiceElement e2EncId = elementList[i * ElementsPerItem + 1]; ServiceElement e3BaseId = elementList[i * ElementsPerItem + 2]; if (e1Lang.ElementType != ElementType.UInt16 || e2EncId.ElementType != ElementType.UInt16 || e3BaseId.ElementType != ElementType.UInt16) { throw new System.Net.ProtocolViolationException(ErrorMsgLangBaseListParseNotU16); } if ((ushort)e3BaseId.Value == 0) { throw new System.Net.ProtocolViolationException(ErrorMsgLangBaseListParseBaseInvalid); } LanguageBaseItem item = new LanguageBaseItem( (ushort)e1Lang.Value, (ushort)e2EncId.Value, (ushort)e3BaseId.Value); items[i] = item; } return(items); }
/// <summary> /// Create the element in the buffer starting at offset, and return its totalLength. /// </summary> /// <param name="element">The element to create. /// </param> /// <param name="buf">The byte array to write the encoded element to. /// </param> /// <param name="offset">The place to start writing in <paramref name="buf"/>. /// </param> /// /// <returns>The total length of the encoded element written to the buffer /// </returns> protected virtual int CreateElement(ServiceElement element, byte[] buf, int offset) { int totalLength; // if (element.ElementTypeDescriptor == ElementTypeDescriptor.ElementSequence || element.ElementTypeDescriptor == ElementTypeDescriptor.ElementAlternative) { int curLen; curLen = MakeVariableLengthHeader(buf, offset, element.ElementTypeDescriptor, out HeaderWriteState headerState); offset += curLen; foreach (ServiceElement childElement in element.GetValueAsElementList()) { curLen = CreateElement(childElement, buf, offset); offset += curLen; }//for CompleteHeaderWrite(headerState, buf, offset, out totalLength); //---------------- } else if (element.ElementTypeDescriptor == ElementTypeDescriptor.UnsignedInteger || element.ElementTypeDescriptor == ElementTypeDescriptor.TwosComplementInteger) { switch (element.ElementType) { case ElementType.UInt8: WriteByte(element, (byte)element.Value, buf, ref offset, out totalLength); break; case ElementType.Int8: WriteSByte(element, (sbyte)element.Value, buf, ref offset, out totalLength); break; case ElementType.UInt16: WriteUInt16(element, (ushort)element.Value, buf, ref offset, out totalLength); break; case ElementType.Int16: WriteInt16(element, (short)element.Value, buf, ref offset, out totalLength); break; case ElementType.UInt32: WriteUInt32(element, (uint)element.Value, buf, ref offset, out totalLength); break; case ElementType.Int32: WriteInt32(element, (int)element.Value, buf, ref offset, out totalLength); break; case ElementType.UInt64: WriteUInt64(element, (ulong)element.Value, buf, ref offset, out totalLength); break; case ElementType.Int64: WriteInt64(element, (long)element.Value, buf, ref offset, out totalLength); break; default: System.Diagnostics.Debug.Fail(string.Format(System.Globalization.CultureInfo.InvariantCulture, "Unexpected integral type '{0}'.", element.ElementType)); totalLength = 0; break; }//switch //---------------- } else if (element.ElementTypeDescriptor == ElementTypeDescriptor.Uuid) { if (element.ElementType == ElementType.Uuid16) { WriteUInt16(element, (ushort)element.Value, buf, ref offset, out totalLength); } else if (element.ElementType == ElementType.Uuid32) { WriteUInt32(element, (uint)element.Value, buf, ref offset, out totalLength); } else { //TODO If the 'Guid' holds a 'Bluetooth-based' UUID, then should we write the short form? byte[] bytes; System.Diagnostics.Debug.Assert(element.ElementType == ElementType.Uuid128); Guid hostGuid = (Guid)element.Value; Guid netGuid = Sockets.BluetoothListener.HostToNetworkOrder(hostGuid); bytes = netGuid.ToByteArray(); WriteFixedLength(element, bytes, buf, ref offset, out totalLength); } //---------------- } else if (element.ElementTypeDescriptor == ElementTypeDescriptor.Url) { Uri uri = element.GetValueAsUri(); string uriString = uri.ToString(); byte[] valueBytes = System.Text.Encoding.ASCII.GetBytes(uriString); WriteVariableLength(element, valueBytes, buf, ref offset, out totalLength); //---------------- } else if (element.ElementTypeDescriptor == ElementTypeDescriptor.TextString) { byte[] valueBytes; if (element.Value is string valueString) { valueBytes = System.Text.Encoding.UTF8.GetBytes(valueString); } else { System.Diagnostics.Debug.Assert(element.Value is byte[]); valueBytes = (byte[])element.Value; } WriteVariableLength(element, valueBytes, buf, ref offset, out totalLength); //---------------- } else if (element.ElementTypeDescriptor == ElementTypeDescriptor.Nil) { WriteFixedLength(element, new byte[0], buf, ref offset, out totalLength); //---------------- } else if (element.ElementTypeDescriptor == ElementTypeDescriptor.Boolean) { bool value = (bool)element.Value; byte[] valueBytes = new byte[1]; valueBytes[0] = value ? (byte)1 : (byte)0; WriteFixedLength(element, valueBytes, buf, ref offset, out totalLength); //---------------- } else { totalLength = 0; } // if (totalLength == 0) { throw new NotSupportedException(string.Format(System.Globalization.CultureInfo.InvariantCulture, "Creation of element type '{0}' not implemented.", element.ElementType)); } return(totalLength); }