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BizHawk
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Added support for TI83 group files, and added checks to ensure the file follows the proper format.

This commit is contained in:
thebrick448 2013-09-17 04:11:13 +00:00
parent 88a9b95b15
commit a40bda3263
3 changed files with 109 additions and 41 deletions
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122
BizHawk.Emulation/Consoles/Calculator/TI83.cs
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@ -630,9 +630,12 @@ namespace BizHawk.Emulation.Consoles.Calculator
public Link LinkPort;
public class Link
{
byte[] FileData;
readonly TI83 Parent;
private FileStream CurrentFile;
private int FileBytesLeft;
private byte[] VariableData;
private Action NextStep;
private Queue<byte> CurrentData = new Queue<byte>();
private ushort BytesToSend;
@ -786,43 +789,94 @@ namespace BizHawk.Emulation.Consoles.Calculator
}
}
public void SendFileToCalc(FileStream FS)
public void SendFileToCalc(FileStream FS, bool Verify)
{
if (Verify)
VerifyFile(FS);
FS.Seek(55, SeekOrigin.Begin);
CurrentFile = FS;
SendNextFile();
}
private void VerifyFile(FileStream FS)
{
FS.Seek(53, SeekOrigin.Begin);
//Verify the file format.
byte[] Expected = new byte[] { 0x2a, 0x2a, 0x54, 0x49, 0x38, 0x33, 0x2a, 0x2a, 0x1a, 0x0a, 0x00 };
byte[] Actual = new byte[11];
FS.Seek(0, SeekOrigin.Begin);
FS.Read(Actual, 0, 11);
//Check the header.
for (int n = 0; n < 11; n++)
if (Expected[n] != Actual[n])
{
FS.Close();
throw new IOException("Invalid Header.");
}
//Seek to the end of the comment.
FS.Seek(53, SeekOrigin.Begin);
int Size = FS.ReadByte() + FS.ReadByte() * 256;
if (FS.Length != Size + 57)
throw new FormatException("Invalid calculator file.");
if (FS.Length != Size + 57)
{
FS.Close();
throw new IOException("Invalid file length.");
}
byte[] Header = new byte[13];
FS.Read(Header, 0, 13);
//Verify the checksum.
ushort Checksum = 0;
for (int n = 0; n < Size; n++)
Checksum += (ushort)FS.ReadByte();
FileData = new byte[Size - 13];
FS.Read(FileData, 0, Size - 13);
ushort ActualChecksum = (ushort)(FS.ReadByte() + FS.ReadByte() * 256);
//Request to send the file.
CurrentData.Clear();
CurrentData.Enqueue(0x03);
CurrentData.Enqueue(0xC9);
foreach (byte B in Header)
CurrentData.Enqueue(B);
//Calculate the checksum for the command.
ushort Checksum = 0;
for (int n = 2; n < Header.Length; n++)
Checksum += Header[n];
CurrentData.Enqueue((byte)(Checksum % 256));
CurrentData.Enqueue((byte)(Checksum / 256));
//Finalize the command.
CurrentStatus = Status.PrepareReceive;
NextStep = ReceiveReqAck;
Parent.LinkActive = true;
if (Checksum != ActualChecksum)
{
FS.Close();
throw new IOException("Invalid Checksum.");
}
}
private void SendNextFile()
{
byte[] Header = new byte[13];
if (!CurrentFile.CanRead || CurrentFile.Read(Header, 0, 13) != 13)
{
//End of file.
CurrentFile.Close();
return;
}
int Size = Header[2] + Header[3] * 256;
VariableData = new byte[Size + 2];
CurrentFile.Read(VariableData, 0, Size + 2);
//Request to send the file.
CurrentData.Clear();
CurrentData.Enqueue(0x03);
CurrentData.Enqueue(0xC9);
foreach (byte B in Header)
CurrentData.Enqueue(B);
//Calculate the checksum for the command.
ushort Checksum = 0;
for (int n = 2; n < Header.Length; n++)
Checksum += Header[n];
CurrentData.Enqueue((byte)(Checksum % 256));
CurrentData.Enqueue((byte)(Checksum / 256));
//Finalize the command.
CurrentStatus = Status.PrepareReceive;
NextStep = ReceiveReqAck;
Parent.LinkActive = true;
}
private void ReceiveReqAck()
{
Parent.LinkActive = false;
@ -858,13 +912,13 @@ namespace BizHawk.Emulation.Consoles.Calculator
CurrentData.Enqueue(0x15);
//Add variable data.
foreach (byte B in FileData)
foreach (byte B in VariableData)
CurrentData.Enqueue(B);
//Calculate the checksum.
ushort Checksum = 0;
for (int n = 2; n < FileData.Length; n++)
Checksum += FileData[n];
for (int n = 2; n < VariableData.Length; n++)
Checksum += VariableData[n];
CurrentData.Enqueue((byte)(Checksum % 256));
CurrentData.Enqueue((byte)(Checksum / 256));
@ -903,6 +957,7 @@ namespace BizHawk.Emulation.Consoles.Calculator
private void OutOfMemory()
{
CurrentFile.Close();
Parent.LinkActive = false;
CurrentData.Clear();
@ -932,6 +987,7 @@ namespace BizHawk.Emulation.Consoles.Calculator
CurrentData.Clear();
Parent.LinkActive = false;
NextStep = null;
SendNextFile();
}
}
}

20
BizHawk.MultiClient/MainForm.MenuItems.cs
View File

@ -2599,5 +2599,25 @@ namespace BizHawk.MultiClient
{
new RewindConfig().ShowDialog();
}
private void loadTIFileToolStripMenuItem_Click(object sender, EventArgs e)
{
OpenFileDialog OFD = new OpenFileDialog();
if (OFD.ShowDialog() == System.Windows.Forms.DialogResult.OK)
{
try
{
(Global.Emulator as TI83).LinkPort.SendFileToCalc(File.OpenRead(OFD.FileName), true);
}
catch (IOException ex)
{
string Message = string.Format("Invalid file format. Reason: {0} \nForce transfer? This may cause the calculator to crash.", ex.Message);
if (MessageBox.Show(Message, "Upload Failed", MessageBoxButtons.YesNoCancel, MessageBoxIcon.Question) == System.Windows.Forms.DialogResult.Yes)
(Global.Emulator as TI83).LinkPort.SendFileToCalc(File.OpenRead(OFD.FileName), false);
}
}
}
}
}

8
BizHawk.MultiClient/MainForm.cs
View File

@ -4201,14 +4201,6 @@ namespace BizHawk.MultiClient
}
}
private void loadTIFileToolStripMenuItem_Click(object sender, EventArgs e)
{
OpenFileDialog OFD = new OpenFileDialog();
if (OFD.ShowDialog() == System.Windows.Forms.DialogResult.OK)
(Global.Emulator as TI83).LinkPort.SendFileToCalc(File.OpenRead(OFD.FileName));
}
private void newRamSearchToolStripMenuItem_Click(object sender, EventArgs e)
{
new NewRamSearch().Show();