static void Test(Compression compression, string originalFile, string report)
{
BinaryReader br = new BinaryReader(File.OpenRead(originalFile));
byte[] file = br.ReadBytes((int)br.BaseStream.Length);
br.Close();
int[] offsetsToTest = compression.Scan(file, 0, file.Length, 4, 0, file.Length);
int i;
List<int> differentOffsets = new List<int>(50);
for (i = 0; i < offsetsToTest.Length; i++)
{
bool success = true;
byte[] data = compression.Compress(compression.Decompress(file, offsetsToTest[i]));
byte[] data2 = new byte[compression.CompressedLength(file, offsetsToTest[i])];
Array.Copy(file, offsetsToTest[i], data2, 0, data2.Length);
success = data.Length <= data2.Length;
/*for (int j = 0; j < data.Length && success; j++)
success = data[j] == data2[j];*/
if (!success)
differentOffsets.Add(offsetsToTest[i]);
}
if (differentOffsets.Count == 0)
{
messagePoster("No differences were found.");
}
else
{
messagePoster("There is a difference.");
StreamWriter sw = new StreamWriter(report, false);
for (int j = 0; j < differentOffsets.Count; j++)
{
sw.WriteLine(Convert.ToString(differentOffsets[j], 16));
}
sw.Close();
}
}
static void Compress(Compression compression, string input, string output, int inputOffset, int length, int outputOffset)
{
if ((compression.supportedModes & CompressionOperation.Compress) == CompressionOperation.None)
{
messagePoster("Compression type doesn't support compressing.");
return;
}
byte[] data;
try
{
BinaryReader br = new BinaryReader(File.OpenRead(input));
br.BaseStream.Position = inputOffset;
if (length == 0 || (br.BaseStream.Length - br.BaseStream.Position) < length)
{
length = (int)(br.BaseStream.Length - br.BaseStream.Position);
}
data = br.ReadBytes(length);
br.Close();
}
catch (IOException)
{
messagePoster("Error while opening the file.");
return;
}
byte[] compData = compression.Compress(data);
try
{
BinaryWriter bw = new BinaryWriter(File.Open(output, FileMode.OpenOrCreate));
bw.BaseStream.Position = outputOffset;
bw.Write(compData);
bw.Close();
}
catch (IOException)
{
messagePoster("Error while opening output file.");
return;
}
messagePoster("Finished");
}