private void RtbSource_TextChanged(object sender, EventArgs e)
{
SetDefaultEncodingTextInfo();
if (RtbSource.TextLength == 0)
{
return;
}
try
{
var encoded = ArithmeticCoding.Encode(RtbSource.Text);
_lastSavedEncoded = encoded.ToString();
LblSourceEntropy.Text += ArithmeticInfo.GetEntropy(encoded.OccurrenceFrequencies);
LblEncodedEntropy.Text += ArithmeticInfo.GetEntropy(encoded);
LblCompressRatio.Text += ArithmeticInfo.GetCompressionRatio(encoded);
LblRedundantRatio.Text += ArithmeticInfo.GetRedundantRatio(encoded);
LblAlphabetSize.Text += encoded.OccurrenceFrequencies.Count;
LblTextLength.Text += RtbSource.TextLength;
LblEncoded.Text += _lastSavedEncoded;
if (_lastSavedEncoded.Length > MaxCodeLength)
{
BtnShowFullEncoded.Visible = true;
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
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);
}
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);
}
}