/// <summary>
/// Construct a Getopt instance with given input data that is capable
/// of parsing long options and short options. Contrary to what you
/// might think, the flag <paramref name="longOnly"/> does not
/// determine whether or not we scan for only long arguments. Instead,
/// a value of true here allows long arguments to start with a
/// '<c>-</c>' instead of "<c>--</c>" unless there is a conflict with
/// a short option name.
/// </summary>
/// <param name="progname">
/// The name to display as the program name when printing errors
/// </param>
/// <param name="argv">
/// The string array passed as the command ilne to the program.
/// </param>
/// <param name="optstring">
/// A string containing a description of the valid short args for this
/// program.
/// </param>
/// <param name="longOptions">
/// An array of <see cref="LongOpt"/> objects that describes the valid
/// long args for this program.
/// </param>
/// <param name="longOnly">
/// true if long options that do not conflict with short options can
/// start with a '<c>-</c>' as well as "<c>--</c>".
/// </param>
public Getopt(string progname, string[] argv, string optstring,
LongOpt[] longOptions, bool longOnly)
{
if (optstring.Length == 0)
optstring = " ";
// This function is essentially _getopt_initialize from GNU getopt
this.progname = progname;
this.argv = argv;
this.optstring = optstring;
this.longOptions = longOptions;
this.longOnly = longOnly;
// Check for application setting "Gnu.PosixlyCorrect" to determine
// whether to strictly follow the POSIX standard. This replaces the
// "POSIXLY_CORRECT" environment variable in the C version
try
{
if((bool) new AppSettingsReader().GetValue(
"Gnu.PosixlyCorrect", typeof(bool)))
{
this.posixlyCorrect = true;
this.cultureInfo = new CultureInfo("en-US");
}
else
this.posixlyCorrect = false;
}
catch(Exception)
{
this.posixlyCorrect = false;
}
// Determine how to handle the ordering of options and non-options
if (optstring[0] == '-')
{
this.ordering = Order.ReturnInOrder;
if (optstring.Length > 1)
this.optstring = optstring.Substring(1);
}
else if (optstring[0] == '+')
{
this.ordering = Order.RequireOrder;
if (optstring.Length > 1)
this.optstring = optstring.Substring(1);
}
else if (this.posixlyCorrect)
{
this.ordering = Order.RequireOrder;
}
else
{
this.ordering = Order.Permute; // The normal default case
}
}
/// <summary>
/// Construct a Getopt instance with given input data that is capable
/// of parsing long options as well as short.
/// </summary>
/// <param name="progname">
/// The name to display as the program name when printing errors.
/// </param>
/// <param name="argv">
/// The string array passed as the command ilne to the program.
/// </param>
/// <param name="optstring">
/// A string containing a description of the valid short args for this
/// program.
/// </param>
/// <param name="longOptions">
/// An array of <see cref="LongOpt"/> objects that describes the valid
/// long args for this program.
/// </param>
public Getopt(string progname, string[] argv, string optstring,
LongOpt[] longOptions)
: this(progname, argv, optstring,
longOptions, false)
{
}