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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include "glk/tads/tads2/command_line.h"
namespace Glk {
namespace TADS {
namespace TADS2 {
/* get a toggle argument */
int cmdtog(errcxdef *ec, int prv, char *argp, int ofs,
void (*usagefn)(errcxdef *))
{
switch(argp[ofs + 1])
{
case '+':
return(TRUE);
case '-':
return(FALSE);
case '\0':
return(!prv);
default:
/* invalid - display usage if we have a callback for it */
if (usagefn != 0)
(*usagefn)(ec);
NOTREACHEDV(int);
return 0;
}
}
/* get an argument to a switch */
char *cmdarg(errcxdef *ec, char ***argpp, int *ip, int argc, int ofs,
void (*usagefn)(errcxdef *))
{
char *ret;
/*
* check to see if the argument is appended directly to the option;
* if not, look at the next string
*/
ret = (**argpp) + ofs + 1;
if (*ret == '\0')
{
/*
* it's not part of this string - get the argument from the next
* string in the vector
*/
++(*ip);
++(*argpp);
ret = (*ip >= argc ? 0 : **argpp);
}
/*
* if we didn't find the argument, it's an error - display usage if
* we have a valid usage callback
*/
if ((ret == 0 || *ret == 0) && usagefn != 0)
(*usagefn)(ec);
return ret;
}
} // End of namespace TADS2
} // End of namespace TADS
} // End of namespace Glk
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