/// <summary>
/// Handles file selection option from open file dialog window
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void dlgOpenFile_FileOk(object sender, CancelEventArgs e)
{
if (null == (m_dskInfo = SimpleDisk.CreateInstance(dlgOpenFile.FileName)))
{
lblInfo.Text = "Image is not a valid CoCo disk!";
return;
}
tabMain.Enabled = true;
lblInfo.Text = String.Format(@" Tracks: {0}
Track Length: {1} bytes
Granules: {2}
Free Granules: {3}
Free Space: {4} bytes
Used Space: {5} bytes
Files: {6}",
m_dskInfo.Tracks,
m_dskInfo.TrackLength,
m_dskInfo.Granules.Length,
m_dskInfo.FreeGranules,
m_dskInfo.FreeGranules * 2304,
(68 - m_dskInfo.FreeGranules) * 2304,
m_dskInfo.Files.Count);
lstFiles.Nodes.Clear();
foreach (DirectoryEntry de in m_dskInfo.Directory)
{
TreeNode file = new TreeNode(de.Name);
file.Nodes.Add(String.Format("Type: {0}", de.FileType));
SimpleFile sf = de.GetFile();
switch (de.FileType)
{
case FileTypes.Assembly:
AssemblyFile af = (AssemblyFile)sf;
file.Nodes.Add(String.Format("Length: {0}", af.BlockLength));
file.Nodes.Add(String.Format("Load Addr: {0}", af.LoadAddress));
file.Nodes.Add(String.Format("Exec Addr: {0}", af.ExecAddress));
break;
default:
break;
}
//file.Nodes.Add (String.Format ("Length: {0}", de.Length));
//file.Nodes.Add (String.Format ("Granule: {0}", de.Granule));
lstFiles.Nodes.Add(file);
}
}
/// <summary>
/// Loads the disk image at the specified location and returns either a DMKDisk or RealDisk
/// object.
/// </summary>
/// <param name="path"></param>
/// <returns></returns>
static public SimpleDisk CreateInstance(string path)
{
FileInfo info = null;
SimpleDisk dsk = null;
// quit if the file doesn't exist
if (!File.Exists(path))
{
return(null);
}
// get the file info
info = new FileInfo(path);
// figure out what type of image this is
switch (info.Length)
{
case 224016:
dsk = new DMKVirtualDisk();
break;
case 161280:
case 156672:
dsk = new RawDisk();
break;
default:
break;
}
// unknown type, based on size alone
if (null == dsk)
{
return(null);
}
// initialize the disk object
dsk.Initialize(path);
return(dsk);
}
/// <summary>
/// Creates an instance of DirectoryEntry object using binary data from the sector
/// </summary>
/// <param name="disk"></param>
/// <param name="entry"></param>
/// <returns></returns>
public static DirectoryEntry CreateInstance(SimpleDisk disk, byte [] entry)
{
/*
* entry contains specific information (bytes listed):
* 0 - 7 = file name
* 8 - 10 = file extension
* 11 = file type
* 12 = ascii/binary flag (0 = bin, 255 = asc)
* 13 = first granule number
* 14 - 15 = number of bytes in last granule
* 16 - 31 = reserved
*/
// quit for bad data
if (null == entry || 32 != entry.Length)
{
return(null);
}
// check for unused entry name - if bit 7 is set, then
// entry is not in use.
if ((0x80 & entry [0]) == 0x80)
{
return(null);
}
DirectoryEntry di = new DirectoryEntry(disk);
string name = Encoding.ASCII.GetString(entry, 0, 8);
string ext = Encoding.ASCII.GetString(entry, 8, 3);
// create file handler for specified type
di.Name = String.Format("{0}.{1}", name.Trim(), ext.Trim());
di.FileType = (FileTypes)entry [11];
di.StartGranule = entry [13];
di.LastSectorLength = ((int)entry [14]) * 256 + (int)entry [15];
return(di);
}
/// <summary>
/// Private constructor
/// </summary>
/// <param name="disk"></param>
private DirectoryEntry(SimpleDisk disk)
{
Disk = disk;
}
