/*

 * lftp - file transfer program

 *

 * Copyright (c) 1996-2017 by Alexander V. Lukyanov (lav@yars.free.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 3 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, see <http://www.gnu.org/licenses/>.

 */

#include <config.h>

#include "misc.h"

#include "ArgV.h"

ArgV::ArgV(const char *a0, const char *args_c)

{

   ind=0;

   Append(a0);

   char *args=alloca_strdup(args_c);

   for(char *t=strtok(args," "); t; t=strtok(NULL," "))

      Append(t);

}

ArgV::~ArgV()

{

}

void ArgV::seek(int n)

{

   if(n>=Count())

      n=Count();

   ind=n;

}

const char *ArgV::getnext()

{

   const char *s=String(++ind);

   if(!s)

      ind=Count(); // getcurr will return 0

   return s;

}

void ArgV::back()

{

   if(ind>0)

      ind--;

}

xstring& ArgV::CombineTo(xstring& res,int start,int end) const

{

   res.nset("",0);

   if(!end)

      end=Count();

   if(start>=end)

      return res;

   for(;;)

   {

      res.append(getarg(start++));

      if(start>=end)

	 return(res);

      res.append(' ');

   }

}

xstring& ArgV::CombineShellQuotedTo(xstring& res,int start) const

{

   res.nset("",0);

   if(start>=Count())

      return res;

   for(;;)

   {

      for(const char *arg=String(start++); *arg; arg++)

      {

	 if (is_shell_special(*arg))

	    res.append('\\');

	 res.append(*arg);

      }

      if(start>=Count())

	 return(res);

      res.append(' ');

   }

}

int ArgV::getopt_long(const char *opts,const struct option *lopts,int *lind)

{

   optind=ind;

   int r=::getopt_long(Count(),SetNonConst(),opts,lopts,lind);

   ind=optind;

   return r;

}

const char *ArgV::getopt_error_message(int e)

{

   if(optopt>=32 && optopt<127)

   {

      if(e==':')

	 return xstring::format("%s -- %c",_("option requires an argument"),optopt);

      else

	 return xstring::format("%s -- %c",_("invalid option"),optopt);

   }

   if(ind>1)

   {

      if(e==':')

	 return xstring::format(_("option `%s' requires an argument"),getarg(ind-1));

      else

	 return xstring::format(_("unrecognized option `%s'"),getarg(ind-1));

   }

   return _("invalid option");

}