private static void InitializeSusp(IsoContext context, DirectoryRecord rootSelfRecord)
{
// Stage 1 - SUSP present?
List <SuspExtension> extensions = new List <SuspExtension>();
if (!SuspRecords.DetectSharingProtocol(rootSelfRecord.SystemUseData, 0))
{
context.SuspExtensions = new List <SuspExtension>();
context.SuspDetected = false;
return;
}
else
{
context.SuspDetected = true;
}
SuspRecords suspRecords = new SuspRecords(context, rootSelfRecord.SystemUseData, 0);
// Stage 2 - Init general SUSP params
SharingProtocolSystemUseEntry spEntry = (SharingProtocolSystemUseEntry)suspRecords.GetEntries(null, "SP")[0];
context.SuspSkipBytes = spEntry.SystemAreaSkip;
// Stage 3 - Init extensions
List <SystemUseEntry> extensionEntries = suspRecords.GetEntries(null, "ER");
if (extensionEntries != null)
{
foreach (ExtensionSystemUseEntry extension in extensionEntries)
{
switch (extension.ExtensionIdentifier)
{
case "RRIP_1991A":
case "IEEE_P1282":
case "IEEE_1282":
extensions.Add(new RockRidgeExtension(extension.ExtensionIdentifier));
context.RockRidgeIdentifier = extension.ExtensionIdentifier;
break;
default:
extensions.Add(new GenericSuspExtension(extension.ExtensionIdentifier));
break;
}
}
}
else if (suspRecords.GetEntries(null, "RR") != null)
{
// Some ISO creators don't add the 'ER' record for RockRidge, but write the (legacy)
// RR record anyway
extensions.Add(new RockRidgeExtension("RRIP_1991A"));
context.RockRidgeIdentifier = "RRIP_1991A";
}
context.SuspExtensions = extensions;
}
