public bool Identify(string filename)
{
using (var br = new BinaryReaderX(File.OpenRead(filename)))
{
if (br.BaseStream.Length < 4)
{
return(false);
}
br.BaseStream.Position = 2;
var crc16 = br.ReadUInt16();
if (br.BaseStream.Length < 0x20)
{
return(false);
}
if (br.BaseStream.Length < 0x820)
{
return(false);
}
br.BaseStream.Position = 0x20;
try
{
return(Crc16.Create(br.ReadBytes(0x820)) == crc16);
}
catch (Exception) { }
return(false);
}
}
public void X25Compute_Successful()
{
var crc = Crc16.Create(Crc16Formula.X25);
var hash = BinaryPrimitives.ReadInt16BigEndian(crc.Compute(_check)) & 0xFFFF;
Assert.AreEqual(_x25Result, hash);
}
public void Save(string filename)
{
using (var bw = new BinaryWriterX(File.Create(filename)))
{
List <byte> result = new List <byte>();
var settings = new ImageSettings
{
Width = 32,
Height = 32,
BitPerIndex = BitLength.Bit4
};
var palette = Common.CreatePalette(bmps[0]);
var paletteB = Common.EncodePalette(palette, Format.BGR555);
var tileData = Common.Save(bmps[0], settings, palette);
result.AddRange(tileData);
result.AddRange(paletteB);
result.AddRange(titleInfo);
var crc16 = Crc16.Create(result.ToArray());
header.crc16 = (ushort)crc16;
bw.WriteStruct(header);
bw.WritePadding(0x1c);
bw.Write(result.ToArray());
}
}
public void Save(string filename)
{
if (bmps[0].Width != 32 || bmps[0].Height != 32)
{
throw new System.Exception("Banner needs to be 32x32");
}
using (var bw = new BinaryWriterX(File.Create(filename)))
{
var tileData = Kontract.Image.Common.Save(bmps[0], settings);
var paletteData = format.paletteBytes;
List <byte> result = new List <byte>();
result.AddRange(tileData);
result.AddRange(paletteData);
result.AddRange(titleInfo);
var crc16 = Crc16.Create(result.ToArray());
header.crc16 = (ushort)crc16;
bw.WriteStruct(header);
bw.WritePadding(0x1c);
bw.Write(result.ToArray());
}
}
public XseqStringWriter(Stream stringStream) : base(stringStream)
{
_crc16 = Crc16.Create(Crc16Formula.X25);
}
private void btnCrcFile_Click(object sender, EventArgs e)
{
btnFile_Click(btnCrcFile, new EventArgs());
Application.DoEvents();
int times = 1000;
byte[] bs = File.ReadAllBytes(txtCrcFile.Text);
FileStream fs = File.OpenRead(txtCrcFile.Text);
MemoryStream ms = new MemoryStream(bs);
byte[] res = null;
System.Diagnostics.Stopwatch watch = new System.Diagnostics.Stopwatch();
Crc16 crc16 = Crc16.Create();
watch.Start();
for (int i = 0; i < times; i++)
{
res = crc16.ComputeHash(bs);
}
watch.Stop();
lab16B.Text = res.ToHexString("") + " > " + (watch.ElapsedTicks / times).ToString();
Application.DoEvents();
watch.Restart();
for (int i = 0; i < times; i++)
{
res = crc16.ComputeHash(fs);
}
watch.Stop();
lab16S.Text = res.ToHexString("") + " > " + (watch.ElapsedTicks / times).ToString();
Application.DoEvents();
watch.Restart();
for (int i = 0; i < times; i++)
{
res = crc16.ComputeHash(ms);
}
watch.Stop();
lab16M.Text = res.ToHexString("") + " > " + (watch.ElapsedTicks / times).ToString();
Application.DoEvents();
Crc32 crc32 = Crc32.Create();
watch.Start();
for (int i = 0; i < times; i++)
{
res = crc32.ComputeHash(bs);
}
watch.Stop();
lab32B.Text = res.ToHexString("") + " > " + (watch.ElapsedTicks / times).ToString();
Application.DoEvents();
watch.Restart();
for (int i = 0; i < times; i++)
{
res = crc32.ComputeHash(fs);
}
watch.Stop();
lab32S.Text = res.ToHexString("") + " > " + (watch.ElapsedTicks / times).ToString();
Application.DoEvents();
watch.Restart();
for (int i = 0; i < times; i++)
{
res = crc32.ComputeHash(ms);
}
watch.Stop();
lab32M.Text = res.ToHexString("") + " > " + (watch.ElapsedTicks / times).ToString();
Application.DoEvents();
}
