private void DecodeBtn_Click(object sender, EventArgs e)
{
using OpenFileDialog openFile = new OpenFileDialog
{
Filter = "RS files (*.bin)|*.bin"
};
if (openFile.ShowDialog() != DialogResult.OK)
{
return;
}
if (!File.Exists(openFile.FileName))
{
return;
}
using BinaryReader reader = new BinaryReader(File.OpenRead(openFile.FileName));
int n = reader.ReadInt32();
int k = reader.ReadInt32();
string ext = reader.ReadString();
long length = reader.ReadInt64();
byte[] tempFile = reader.ReadBytes((int)(reader.BaseStream.Length - reader.BaseStream.Position));
byte[] origFile = new byte[length];
RSCS rs = new RSCS((byte)n, (byte)k);
int blocks = tempFile.Length / n;
int errors = 0;
for (int j = 0; j < blocks - 1; j++)
{
errors += rs.DecodeBuffer(ref tempFile[j * n]);
Buffer.BlockCopy(tempFile, j * n, origFile, j * k, k);
}
errors += rs.DecodeBuffer(ref tempFile[(blocks - 1) * n]);
Buffer.BlockCopy(tempFile, (blocks - 1) * n, origFile, (blocks - 1) * k, origFile.Length - (blocks - 1) * k);
string info = "Исправлено " + errors.ToString() + " ошибок" + Environment.NewLine;
string restoredName = Path.Combine(Path.GetDirectoryName(openFile.FileName),
Path.GetFileNameWithoutExtension(openFile.FileName) + "-restored" + ext);
using BinaryWriter writer = new BinaryWriter(File.Create(restoredName));
writer.Write(origFile);
writer.Flush();
MessageBox.Show(info + "Файл " + Path.GetFileName(restoredName) + " сохранён");
}
private void EncodeBtn_Click(object sender, EventArgs e)
{
if (testFile == null || testFile.Length < 1024)
{
return;
}
int fileSz = testFile.Length - 256;
int t = 32, k = int.Parse(blockSzCB.SelectedItem.ToString());
int blockCount = 1 + fileSz / k, n = k + t * 2;
byte[] tempFile = new byte[blockCount * n];
RSCS rs = new RSCS((byte)n, (byte)k);
for (int j = 0; j < blockCount; j++)
{
Buffer.BlockCopy(testFile, j * k, tempFile, j * n, k);
rs.EncodeBuffer(ref tempFile[j * n]);
}
using (SaveFileDialog saveFile = new SaveFileDialog())
{
saveFile.FileName = Path.ChangeExtension(testFileName, "bin");
if (saveFile.ShowDialog() != DialogResult.OK)
{
return;
}
using (BinaryWriter writer = new BinaryWriter(File.Create(saveFile.FileName)))
{
writer.Write(n);
writer.Write(k);
writer.Write(Path.GetExtension(testFileName));
writer.Write(testFileLength);
writer.Write(tempFile);
writer.Flush();
}
MessageBox.Show("Файл " + Path.GetFileName(saveFile.FileName) + " сохранён");
}
}
