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getoptstr.c

/**************************************************************************************************
      $Header: /pub/cvsroot/yencode/lib/getoptstr.c,v 1.2 2002/03/10 16:22:19 bboy Exp $

      Copyright (C) 2002  Don Moore <bboy@bboy.net>

      This program is free software; you can redistribute it and/or modify
      it under the terms of the GNU General Public License as published by
      the Free Software Foundation; either version 2 of the License, or
      (at Your option) any later version.

      This program is distributed in the hope that it will be useful,
      but WITHOUT ANY WARRANTY; without even the implied warranty of
      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      GNU General Public License for more details.

      You should have received a copy of the GNU General Public License
      along with this program; if not, write to the Free Software
      Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
**************************************************************************************************/

#include "misc.h"


/*+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
      GETOPTSTR
      Given a list of long opts, constructs the opt string automatically, since I always forget to
      update it.
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
char *
getoptstr(struct option const longopts[])
{
      char *optstr, *c;
      register int n, opts;

      // Count number of options
      for (opts = 0; longopts[opts].name; opts++)
            ;

      // Allocate optstr
      optstr = (char *)xmalloc(((opts * 3) + 1) * sizeof(char));
      memset(optstr, 0, (opts * 3) + 1);

      // Build optstr
      for (c = optstr, n = 0; n < opts; n++)
      {
            if (longopts[n].val)
            {
                  *c++ = longopts[n].val;
                  if (longopts[n].has_arg == required_argument)
                        *c++ = ':';
                  else if (longopts[n].has_arg == optional_argument)
                  {
                        *c++ = ':';
                        *c++ = ':';
                  }
            }
      }
      return (optstr);
}
/*--- getoptstr() -------------------------------------------------------------------------------*/

/* vi:set ts=3: */

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