public void TestCoding32AlphabetAnd96TextLength()
{
var source = "АбвгдеёйжзийклмнопрстуфхчшщьъэюяАбвгдеёйжзийклмнопрстуфхчшщьъэюяАбвгдеёйжзийклмнопрстуфхчшщьъэюя";
var encoded = ArithmeticCoding.Encode(source);
var decoded = ArithmeticCoding.Decode(encoded);
Assert.AreEqual(source, decoded);
}
public void TestCoding20AlphabetAbd20TextLength()
{
var source = "абвгдеёжзийклмнопрст";
var encoded = ArithmeticCoding.Encode(source);
var decoded = ArithmeticCoding.Decode(encoded);
Assert.AreEqual(source, decoded);
}
public void TestCoding1AlphabetAnd20TextLength()
{
var source = "cccccccccccccccccccc";
var encoded = ArithmeticCoding.Encode(source);
var decoded = ArithmeticCoding.Decode(encoded);
Assert.AreEqual(source, decoded);
}
public void TestCoding64AlphabetAnd128TextLength()
{
var source = "абвгдеёжзийклмнопрстуфхчшщъьэюяABCDEFGHIJKLMNOPQRSTUVWXYZ123456" +
"абвгдеёжзийклмнопрстуфхчшщъьэюяABCDEFGHIJKLMNOPQRSTUVWXYZ123456";
var encoded = ArithmeticCoding.Encode(source);
var decoded = ArithmeticCoding.Decode(encoded);
Assert.AreEqual(source, decoded);
}
public void TestEncodeWriteAndReadDecode()
{
const string source = "abcdefghklmopqastuvwxyz";
const string fileName = "test1.acode";
var fullPath = Path.Combine(GetTestFolder(), fileName);
var encoded = ArithmeticCoding.Encode(source);
ArithmeticFile.Write(fullPath, encoded);
var read = ArithmeticFile.Read(fullPath);
var decoded = ArithmeticCoding.Decode(read);
Assert.AreEqual(source, decoded);
}
private void Decode(object sender, RoutedEventArgs e)
{
Interval interval = new Interval(0, 1);
decimal message = decimal.Parse(messageToDecodeTextBox.Text);
string outMessage = "";
TextBox[] probablities = new TextBox[itemsNumber];
char[] letters = new char[itemsNumber];
for (int i = 0; i < itemsNumber; i++)
{
probablities[i] = alphabet[i, 1];
}
decimal[] probs = parseProbabilities(probablities);
probs = ArithmeticCoding.MakeProportions(probs);
for (int i = 0; i < probablities.Length; i++)
{
Interval[] intervals = ArithmeticCoding.MakeSubintervals(interval, probs);
for (int j = 0; j < intervals.Length; j++)
{
if ((message > intervals[j].l) && (message < intervals[j].r))
{
outMessage += alphabet[j, 0].Text.ToString();
if (((intervals[j].l + intervals[j].r) / 2) == message)
{
i = intervals.Length;
}
else
{
interval = new Interval(intervals[j].l, intervals[j].r);
}
}
if (((intervals[j].l + intervals[j].r) / 2) == message)
{
j = intervals.Length;
}
}
}
resultDecodingTextBlock.Text = outMessage;
resultDeCodingGrid.Visibility = Visibility.Visible;
resultDeCodingGrid.Opacity = 0;
resultDeCodingGrid.OpacityTransition = new ScalarTransition()
{
Duration = new TimeSpan(0, 0, 0, 0, 500)
};
resultDeCodingGrid.Opacity = 1;
}
public void TestCoding256AlphabetAnd1024TextLength()
{
var sb = new StringBuilder(1024);
for (int i = 0; i < 256; i++)
{
sb.Append((char)i);
}
var s = sb.ToString();
sb.Append(s);
sb.Append(s);
sb.Append(s);
var source = sb.ToString();
var encoded = ArithmeticCoding.Encode(source);
var decoded = ArithmeticCoding.Decode(encoded);
Assert.AreEqual(source, decoded);
}
private void BtnSaveCode_Click(object sender, EventArgs e)
{
if (RtbSource.TextLength == 0)
{
return;
}
if (_sdfEncoded.ShowDialog() != DialogResult.OK)
{
return;
}
try
{
var encoded = ArithmeticCoding.Encode(RtbSource.Text);
ArithmeticFile.Write(_sdfEncoded.FileName, encoded);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
private static void Decompress(string inputFile, string outputFile)
{
ArithmeticCoding.Decompress(inputFile, outputFile);
}
private async void Calculate(object sender, RoutedEventArgs e)
{
try
{
char[] message = messageTextBox.Text.ToCharArray();
Interval interval = new Interval();
TextBox[] probablities = new TextBox[itemsNumber];
char[] letters = new char[itemsNumber];
for (int i = 0; i < itemsNumber; i++)
{
probablities[i] = alphabet[i, 1];
var characters = alphabet[i, 0].Text.ToCharArray();
letters[i] = characters[0];
}
bool isMessageInAlphabet = false;
for (int i = 0; i < message.Length; i++)
{
isMessageInAlphabet = checkLetterInAlphabet(message[i], letters);
if (!isMessageInAlphabet)
{
break;
}
}
if (!isMessageInAlphabet)
{
ContentDialog dialog = new ContentDialog {
Title = "Error", Content = "Wiadomość niepoprawna", CloseButtonText = "ok"
};
ContentDialogResult result = await dialog.ShowAsync();
return;
}
try
{
subIntervalsGrid.Children.Clear();
checkProbability(probablities);
decimal[] probs = parseProbabilities(probablities);
probs = ArithmeticCoding.MakeProportions(probs);
for (int p = 0; p < message.GetLength(0); p++)
{
Interval[] intervals = ArithmeticCoding.MakeSubintervals(interval, probs);
addSubinterval(intervals, message[p], letters);
interval = ArithmeticCoding.SetCurrentInterval(intervals, letters, message[p]);
}
resultCodingGrid.Visibility = Visibility.Visible;
resultCodingGrid.Opacity = 0;
resultCodingGrid.OpacityTransition = new ScalarTransition()
{
Duration = new TimeSpan(0, 0, 0, 0, 500)
};
resultCodingGrid.Opacity = 1;
resultCodingTextBlock.Text = "Wynik: " + ((interval.l + interval.r) / 2).ToString();
subIntervalsGrid.Visibility = Visibility.Visible;
subIntervalsGrid.Opacity = 0;
subIntervalsGrid.OpacityTransition = new ScalarTransition()
{
Duration = new TimeSpan(0, 0, 0, 0, 500)
};
subIntervalsGrid.Opacity = 1;
}
catch (Exception ex)
{
ContentDialog dialog = new ContentDialog {
Title = "Error", Content = ex.Message, CloseButtonText = "ok"
};
ContentDialogResult result = await dialog.ShowAsync();
}
}
catch (Exception ex)
{
ContentDialog dialog = new ContentDialog {
Title = "Error", Content = ex.Message, CloseButtonText = "ok"
};
ContentDialogResult result = await dialog.ShowAsync();
}
}
