87 lines
2.1 KiB
C++
87 lines
2.1 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "glk/tads/tads2/command_line.h"
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namespace Glk {
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namespace TADS {
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namespace TADS2 {
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/* get a toggle argument */
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int cmdtog(errcxdef *ec, int prv, char *argp, int ofs,
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void (*usagefn)(errcxdef *))
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{
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switch(argp[ofs + 1])
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{
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case '+':
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return(TRUE);
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case '-':
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return(FALSE);
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case '\0':
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return(!prv);
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default:
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/* invalid - display usage if we have a callback for it */
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if (usagefn != nullptr)
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(*usagefn)(ec);
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NOTREACHEDV(int);
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return 0;
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}
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}
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/* get an argument to a switch */
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char *cmdarg(errcxdef *ec, char ***argpp, int *ip, int argc, int ofs,
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void (*usagefn)(errcxdef *))
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{
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char *ret;
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/*
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* check to see if the argument is appended directly to the option;
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* if not, look at the next string
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*/
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ret = (**argpp) + ofs + 1;
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if (*ret == '\0')
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{
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/*
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* it's not part of this string - get the argument from the next
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* string in the vector
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*/
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++(*ip);
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++(*argpp);
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ret = (*ip >= argc ? nullptr : **argpp);
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}
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/*
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* if we didn't find the argument, it's an error - display usage if
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* we have a valid usage callback
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*/
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if ((ret == nullptr || *ret == 0) && usagefn != nullptr)
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(*usagefn)(ec);
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return ret;
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}
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} // End of namespace TADS2
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} // End of namespace TADS
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} // End of namespace Glk
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