/// <summary>
/// Create a new JVC disk associated with the given stream.
/// </summary>
/// <param name="image">Stream for storing the disk image.</param>
/// <param name="heads">Number of disk heads.</param>
/// <param name="tracks">Number of tracks per head.</param>
/// <param name="sectors">Number of sectors per track.</param>
/// <param name="sectorsize">Sector size in bytes</param>
/// <returns>A disk object</returns>
public static JvcDisk Create(Stream image, int heads, int tracks, int sectors, int sectorsize)
{
if (image == null)
{
throw new ArgumentNullException("image");
}
if (!image.CanRead)
{
throw new NotSupportedException("Disk image stream does not support reading");
}
if (!image.CanSeek)
{
throw new NotSupportedException("Disk image stream does not support seeking");
}
if (!image.CanWrite)
{
throw new NotSupportedException("Disk image stream does not support writing");
}
var disk = new JvcDisk(image, heads, tracks, sectors, sectorsize);
var header = new JvcHeader(heads, tracks, sectors, sectorsize, false);
var headerRaw = header.Encode();
disk.diskHeaderSize = headerRaw.Length;
disk.sectorHeaderSize = 0;
disk.IsWriteable = true;
disk.IsModified = true;
disk.DiskData = new byte[heads * tracks * sectors * sectorsize + disk.diskHeaderSize];
Array.Copy(headerRaw, disk.DiskData, headerRaw.Length);
return(disk);
}
/// <summary>
/// Creates a new virtual disk image file and returns a Disk object associated with it. The file name extension determines the
/// type of Disk object actually returned.
/// </summary>
/// <param name="filename">File name of virtual disk image.</param>
/// <param name="heads">Number of disk heads.</param>
/// <param name="tracks">Number of disk tracks per head.</param>
/// <param name="sectors">Number of disk sectors per track and per head.</param>
/// <param name="sectorsize">The size of each sector measured in bytes.</param>
/// <returns>A Disk object associated with the given file.</returns>
public static IDisk CreateDisk(string filename, int heads, int tracks, int sectors, int sectorsize)
{
filename = filename.ToLowerInvariant();
if (filename.EndsWith(".vdk"))
{
return(VdkDisk.Create(new FileStream(filename, FileMode.Create), heads, tracks, sectors));
}
if (filename.EndsWith(".dsk"))
{
return(JvcDisk.Create(new FileStream(filename, FileMode.Create), heads, tracks, sectors, sectorsize));
}
if (filename.EndsWith(".hfe"))
{
return(HfeDisk.Create(new FileStream(filename, FileMode.Create), heads, tracks, sectors, sectorsize));
}
if (filename.EndsWith(".dmk"))
{
return(DmkDisk.Create(new FileStream(filename, FileMode.Create), heads, tracks, sectors, sectorsize));
}
return(null);
}
/// <summary>
/// Reads a JVC disk image from a given stream.
/// </summary>
/// <param name="image">Stream containing the disk image.</param>
/// <param name="isWriteable">Allow write operations to this disk.</param>
/// <returns>A disk object.</returns>
public static JvcDisk Open(Stream image, bool isWriteable)
{
if (image == null)
{
throw new ArgumentNullException("image");
}
if (!image.CanRead)
{
throw new NotSupportedException("Disk image stream does not support reading");
}
var imageData = IOUtils.ReadStreamFully(image);
var header = JvcHeader.Parse(imageData);
var disk = new JvcDisk(image, header.Heads, header.Tracks, header.Sectors, header.SectorSize);
disk.DiskData = imageData;
disk.diskHeaderSize = header.HeaderSize;
disk.sectorHeaderSize = header.SectorAttribute ? 1 : 0;
disk.IsWriteable = (isWriteable && image.CanSeek && image.CanWrite);
return(disk);
}
/// <summary>
/// Returns a Disk object associated with an existing virtual disk image file. The name (extension) of the file name determines the
/// type of Disk object actually returned.
/// </summary>
/// <param name="filename">File name of virtual disk image.</param>
/// <param name="iswriteable">Returns a writeable Disk object if this is <value>true</value>.</param>
/// <returns>A Disk object associated with the given file.</returns>
public static IDisk OpenDisk(string filename, bool iswriteable)
{
filename = filename.ToLowerInvariant();
var access = iswriteable ? FileAccess.ReadWrite : FileAccess.Read;
if (filename.EndsWith(".vdk"))
{
return(VdkDisk.Open(new FileStream(filename, FileMode.Open, access), iswriteable));
}
if (filename.EndsWith(".dsk"))
{
return(JvcDisk.Open(new FileStream(filename, FileMode.Open, access), iswriteable));
}
if (filename.EndsWith(".hfe"))
{
return(HfeDisk.Open(new FileStream(filename, FileMode.Open, access), iswriteable));
}
if (filename.EndsWith(".dmk"))
{
return(DmkDisk.Open(new FileStream(filename, FileMode.Open, access), iswriteable));
}
return(null);
}
