public DnsResourceDataNamingAuthorityPointer(ushort order, ushort preference, DataSegment flags, DataSegment services, DataSegment regularExpression,
DnsDomainName replacement)
{
if (flags == null)
{
throw new ArgumentNullException("flags");
}
if (!IsLegalFlags(flags))
{
throw new ArgumentException(
string.Format(CultureInfo.InvariantCulture, "Flags ({0}) contain a non [a-zA-Z0-9] character.",
Encoding.ASCII.GetString(flags.Buffer, flags.StartOffset, flags.Length)),
"flags");
}
Order = order;
Preference = preference;
Flags = flags.All(flag => flag <'a' || flag> 'z') && flags.IsStrictOrdered()
? flags
: new DataSegment(flags.Select(flag => flag >= 'a' && flag <= 'z' ? (byte)(flag + 'A' - 'a') : flag)
.Distinct().OrderBy(flag => flag).ToArray());
Services = services;
RegularExpression = regularExpression;
Replacement = replacement;
}
private static bool IsLegalFlags(DataSegment flags)
{
return(flags.All(flag => (flag >= '0' && flag <= '9' || flag >= 'A' && flag <= 'Z' || flag >= 'a' && flag <= 'z')));
}