public static SystemUseEntry Parse(byte[] data, int offset, Encoding encoding, SuspExtension extension,
out byte length)
{
if (data[offset] == 0)
{
// A zero-byte here is invalid and indicates an incorrectly written SUSP field.
// Return null to indicate to the caller that SUSP parsing is terminated.
length = 0;
return(null);
}
string name = Utilities.BytesToString(data, offset, 2);
length = data[offset + 2];
byte version = data[offset + 3];
switch (name)
{
case "CE":
return(new ContinuationSystemUseEntry(name, length, version, data, offset));
case "PD":
return(new PaddingSystemUseEntry(name, length, version));
case "SP":
return(new SharingProtocolSystemUseEntry(name, length, version, data, offset));
case "ST":
// Termination entry. There's no point in storing or validating this one.
// Return null to indicate to the caller that SUSP parsing is terminated.
return(null);
case "ER":
return(new ExtensionSystemUseEntry(name, length, version, data, offset, encoding));
case "ES":
return(new ExtensionSelectSystemUseEntry(name, length, version, data, offset));
case "AA":
case "AB":
case "AS":
// Placeholder support for Apple and Amiga extension records.
return(new GenericSystemUseEntry(name, length, version, data, offset));
default:
if (extension == null)
{
return(new GenericSystemUseEntry(name, length, version, data, offset));
}
return(extension.Parse(name, length, version, data, offset, encoding));
}
}
public static SystemUseEntry Parse(byte[] data, int offset, Encoding encoding, SuspExtension extension, out int length)
{
string name = Utilities.BytesToString(data, offset, 2);
length = data[offset + 2];
switch (name)
{
case "CE":
return(new ContinuationSystemUseEntry(data, offset));
case "PD":
return(new PaddingSystemUseEntry(data, offset));
case "SP":
return(new SharingProtocolSystemUseEntry(data, offset));
case "ST":
return(new TerminatorSystemUseEntry(data, offset));
case "ER":
return(new ExtensionSystemUseEntry(data, offset, encoding));
case "ES":
return(new ExtensionSelectSystemUseEntry(data, offset));
default:
if (extension == null)
{
return(new GenericSystemUseEntry(data, offset));
}
else
{
return(extension.Parse(name, data, offset, length, encoding));
}
}
}
public static SystemUseEntry Parse(byte[] data, int offset, Encoding encoding, SuspExtension extension, out int length)
{
string name = Utilities.BytesToString(data, offset, 2);
length = data[offset + 2];
switch (name)
{
case "CE":
return new ContinuationSystemUseEntry(data, offset);
case "PD":
return new PaddingSystemUseEntry(data, offset);
case "SP":
return new SharingProtocolSystemUseEntry(data, offset);
case "ST":
return new TerminatorSystemUseEntry(data, offset);
case "ER":
return new ExtensionSystemUseEntry(data, offset, encoding);
case "ES":
return new ExtensionSelectSystemUseEntry(data, offset);
default:
if (extension == null)
{
return new GenericSystemUseEntry(data, offset);
}
else
{
return extension.Parse(name, data, offset, length, encoding);
}
}
}