/// <summary>
/// Gets the state machine for a user-defined phone number.
/// </summary>
/// <param name="userState">Object representing the user-defined state machine.</param>
/// <param name="weight"></param>
/// <returns>The state machine.</returns>
public static StateMachine GetPhoneNumber_UserDefined(UserState userState, int weight)
{
StateMachine phoneNumber = new StateMachine { Name = userState.MachineType, _weight = weight };
State prevState = null;
// Have a minimum of 2 bytes.
for (int n = 0; n < userState.Bytes.Count - 1; n++)
{
string nm = String.Format("UserPhoneNumberByte{0}", n);
State state = new State { Name = nm, ParentStateMachine = phoneNumber };
phoneNumber.AddState(state);
if (n == 0)
{
phoneNumber.StartingStates.Add(state);
}
else
{
AddTransition(prevState, state, 1d);
}
prevState = state;
UserDefinedByteProbabilities(state, userState.Bytes[n]);
}
UserDefinedState endState = new UserDefinedState(userState) { Name = "EndUserPhoneNumberByte", ParentStateMachine = phoneNumber };
phoneNumber.AddState(endState);
UserDefinedByteProbabilities(endState, userState.Bytes[userState.Bytes.Count - 1]);
AddTransition(prevState, endState, 1d);
phoneNumber.EndingStates.Add(endState);
return phoneNumber;
}
/// <summary>
/// Gets the state machine for a user-defined text field.
/// </summary>
/// <param name="userState">Object representing the user-defined state machine.</param>
/// <param name="weight"></param>
/// <returns>The state machine.</returns>
public static StateMachine GetText_UserDefined(UserState userState, int weight)
{
StateMachine textState = new StateMachine { Name = userState.MachineType, _weight = weight };
State prevState = null;
// Have a minimum of 2 bytes.
for (int n = 0; n < userState.Bytes.Count - 1; n++)
{
State state = new State { Name = String.Format("UserTextByte{0}", n), ParentStateMachine = textState };
textState.AddState(state);
if (n == 0)
{
textState.StartingStates.Add(state);
}
else
{
AddTransition(prevState, state, 1d);
}
prevState = state;
UserDefinedByteProbabilities(state, userState.Bytes[n]);
}
UserDefinedState endState = new UserDefinedState(userState) { Name = "EndUserTextByte", ParentStateMachine = textState };
textState.AddState(endState);
UserDefinedByteProbabilities(endState, userState.Bytes[userState.Bytes.Count - 1]);
AddTransition(prevState, endState, 1d);
textState.EndingStates.Add(endState);
return textState;
}
/// <summary>
///
/// </summary>
/// <param name="path"></param>
/// <param name="index"></param>
/// <returns>The first index after the end of the field</returns>
private ViterbiField ExtractField(List <State> path, int index)
{
int startIndex = index;
MachineList machineName = path[index].ParentStateMachine.Name;
string fieldHex = "0x";
string fieldAscii = "";
List <byte> fieldBytes = new List <byte>();
while (index < path.Count && machineName == path[index].ParentStateMachine.Name)
{
fieldBytes.Add(_observations[index]);
//If this is an anchor run, no need to print fields
if (!_isAnchor)
{
string observation = Convert.ToString(_observations[index], 16).PadLeft(2, '0');
fieldHex += observation;
fieldAscii += (char)_observations[index];
#if PRINT_ALL
Console.WriteLine("{0}\t:\t{1}\t{2}", path[index], observation, (char)_observations[index]);
#endif
}
index++;
//Allows us to distinguish between adjacent fields of the same type
if (path[index - 1].IsSplitState)
{
break;
}
}
string fieldString;
if (!_isAnchor && ((machineName == MachineList.PhoneNumber_User) ||
(machineName == MachineList.TimeStamp_User) ||
(machineName == MachineList.TimeStamp_User)))
{
// If we're printing a user-defined field then we need to use the user-defined
// methods.
try {
UserDefinedState udState = path[index - 1] as UserDefinedState;
fieldString = Printer.GetUserField(machineName, fieldBytes.ToArray(), udState.UserStateObj);
} catch {
fieldString = "???";
}
}
else
{
fieldString = _isAnchor ? "" : Printer.GetField(machineName, fieldBytes.ToArray());
}
var field = new ViterbiField
{
OffsetPath = startIndex,
OffsetFile = _fileOffset + startIndex,
HexString = fieldHex,
AsciiString = fieldAscii,
FieldString = fieldString,
MachineName = machineName,
Raw = fieldBytes.ToArray()
};
_textList.Add(fieldString);
_fieldList.Add(field);
#if PRINT_FIELD
Console.WriteLine(field);
#endif
return(field);
}
