/// <summary>Returns a <see cref="StringComparer"/> that makes case-insensitive comparisons using the specified rule.</summary>
public static IrcStringComparer GetComparer(CaseMappingMode mode)
{
switch (mode)
{
case CaseMappingMode.ASCII: return(IrcStringComparer.ASCII);
case CaseMappingMode.RFC1459: return(IrcStringComparer.RFC1459);
case CaseMappingMode.StrictRFC1459: return(IrcStringComparer.StrictRFC1459);
default: throw new ArgumentException(nameof(mode) + " is not a valid case mapping mode.", nameof(mode));
}
}
internal IrcStringComparer(CaseMappingMode mode)
{
switch (mode)
{
case CaseMappingMode.ASCII:
maxUppercase = 'Z';
maxLowercase = 'z';
break;
case CaseMappingMode.RFC1459:
maxUppercase = '^';
maxLowercase = '~';
break;
case CaseMappingMode.StrictRFC1459:
maxUppercase = ']';
maxLowercase = '}';
break;
default:
throw new ArgumentException(nameof(mode) + " is not a valid case mapping mode.", nameof(mode));
}
}
