public void Decode(string file)
{
var message = MessageExtractor.ExtractMessage(file);
var messageBeforeRLE = ApplyReverseRLETransformation(message);
var decodedMessage = BuildReverseBWTable(messageBeforeRLE);
MessageFileWriter.WriteEncodedMessageToFile("output.txt", decodedMessage);
}
public void Encode(string file)
{
var message = MessageExtractor.ExtractMessage(file);
GetFrequencyTable(message);
while (_frequencyTable.Count > 1)
{
AddNewLeaf();
}
SetCodes();
var encodedMessage = MakeCode(message);
MessageFileWriter.WriteEncodedMessageToFile("HuffmanEncoderOutput.txt", encodedMessage);
}
public void Encode(string file)
{
var message = MessageExtractor.ExtractMessage(file);
var dictionary = new Dictionary <string, int>();
var encodedMessage = String.Empty;
var newEntrylength = 1;
for (int i = 0; i < message.Length; i += newEntrylength)
{
newEntrylength = 1;
var newEntry = message.Substring(i, newEntrylength);
while (dictionary.ContainsKey(newEntry))
{
newEntrylength++;
newEntry = message.Substring(i, newEntrylength);
}
if (newEntrylength == 1)
{
if (!dictionary.ContainsKey(newEntry))
{
dictionary.Add(newEntry, dictionary.Count + 1);
encodedMessage += "0" + newEntry;
}
else
{
newEntrylength++;
encodedMessage += dictionary[newEntry] + message[newEntrylength];
dictionary.Add(message.Substring(i, newEntrylength), dictionary.Count + 1);
}
}
else
{
encodedMessage += dictionary[newEntry.Substring(0, newEntrylength - 1)] +
newEntry.Substring(newEntrylength - 1, 1);
dictionary.Add(newEntry, dictionary.Count + 1);
}
}
//test comment 2
MessageFileWriter.WriteEncodedMessageToFile("output.txt", encodedMessage);
}
public void Encode(string file)
{
var message = MessageExtractor.ExtractMessage(file);
var messageAfterBW = ApplyBWTransformation(message);
var messageAfterRLE = string.Empty;
int increment = 0;
for (int i = 0; i < message.Length; i += increment)
{
var currentCharacter = messageAfterBW.Key.Substring(i, 1);
increment = 0;
var nextCharacterPosition = i + increment + 1;
if (nextCharacterPosition < message.Length)
{
while (messageAfterBW.Key.Substring(nextCharacterPosition, 1) == currentCharacter)
{
increment++;
nextCharacterPosition++;
if (nextCharacterPosition >= message.Length)
{
break;
}
}
}
if (increment == 0)
{
messageAfterRLE += currentCharacter;
increment++;
}
else
{
increment++;
messageAfterRLE += currentCharacter + increment;
}
}
messageAfterRLE += " " + messageAfterBW.Value;
MessageFileWriter.WriteEncodedMessageToFile("output1.txt", messageAfterRLE);
}
public void Decode(string file)
{
var message = MessageExtractor.ExtractMessage(file);
var dictionary = new Dictionary <int, string>();
var decodedMessage = string.Empty;
int symbolPosition = 0;
int numberPosition = 0;
int numberLength = 0;
int newNumber = 0;
while (symbolPosition <= message.Length - 1 && numberPosition <= message.Length - 2)
{
numberLength = 0;
while (numberPosition + numberLength <= message.Length - 2 && char.IsDigit(message[numberPosition + numberLength]))
{
numberLength++;
}
int.TryParse(message.Substring(numberPosition, numberLength), out newNumber);
symbolPosition = numberPosition + numberLength;
if (newNumber == 0)
{
dictionary.Add(dictionary.Count + 1, message[symbolPosition].ToString());
decodedMessage += message[symbolPosition];
}
else
{
dictionary.Add(dictionary.Count + 1, dictionary[newNumber] + message[symbolPosition]);
decodedMessage += dictionary[newNumber] + message[symbolPosition];
}
numberPosition = symbolPosition + 1;
}
MessageFileWriter.WriteEncodedMessageToFile("output.txt", decodedMessage);
}
