private static List <MimeAppleTranscoder.EntryDescriptor> ReadAppleFileHeaderEntries(Stream applefileStream)
{
int num = MimeAppleTranscoder.ReadUIntFromStream(applefileStream);
if (num != 131072)
{
throw new MimeException(EmailMessageStrings.WrongAppleVersionNumber);
}
applefileStream.Position += 16L;
int num2 = MimeAppleTranscoder.ReadUShortFromStream(applefileStream);
if (num2 > 100)
{
throw new MimeException(EmailMessageStrings.TooManyEntriesInApplefile);
}
List <MimeAppleTranscoder.EntryDescriptor> list = new List <MimeAppleTranscoder.EntryDescriptor>(num2);
for (int i = 0; i < num2; i++)
{
int entryId = MimeAppleTranscoder.ReadUIntFromStream(applefileStream);
int num3 = MimeAppleTranscoder.ReadUIntFromStream(applefileStream);
int num4 = MimeAppleTranscoder.ReadUIntFromStream(applefileStream);
if ((long)num3 < applefileStream.Position || (long)num3 > applefileStream.Length || num4 < 0 || (long)(num4 + num3) > applefileStream.Length)
{
throw new MimeException(EmailMessageStrings.WrongOffsetsInApplefile);
}
MimeAppleTranscoder.EntryDescriptor item = new MimeAppleTranscoder.EntryDescriptor(entryId, num3, num4);
list.Add(item);
}
list.Sort(new Comparison <MimeAppleTranscoder.EntryDescriptor>(MimeAppleTranscoder.EntryDescriptor.CompareByOffset));
return(list);
}