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First phase of REUSE compliance and header reformat

/*
 *
 *   $Id: cmd_const.c,v 1.3 2025/03/09 19:14:24 snw Exp $
 *    Implementation of the CONST command
 *
 *  
 *   Author: Serena Willis <snw@coherent-logic.com>
 *    Copyright (C) 1998 MUG Deutschland
 *    Copyright (C) 2023 Coherent Logic Development LLC
 *
 *
 *   This file is part of FreeM.
 *
 *   FreeM is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU Affero Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   FreeM 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 Affero Public License for more details.
 *
 *   You should have received a copy of the GNU Affero Public License
 *   along with FreeM.  If not, see <https://www.gnu.org/licenses/>.
 *
 *   $Log: cmd_const.c,v $
 *   Revision 1.3  2025/03/09 19:14:24  snw
 *   First phase of REUSE compliance and header reformat
 *
 *
 * SPDX-FileCopyrightText:  (C) 2025 Coherent Logic Development LLC
 * SPDX-License-Identifier: AGPL-3.0-or-later
 **/

#include <string.h>
#include <stdlib.h>
#include "mpsdef.h"
#include "mcommand.h"
#include "consttbl.h"

MRESULT cmd_const(MACTION *ra)
{
    char an[255];
    char vn[255];
    register char ch;
    
    if (rtn_dialect () != D_FREEM) {
        return NOSTAND;
    }
    
    /* argumentless is not supported */
    if (((ch = *codptr) == SP) || ch == EOL) {
        return ARGLIST;
    }
    
    for (;;) {
        
        /* grab an mname */
        expr (NAME);
        if (merr ()) return merr();
        
        stcpy (vn, varnam);
        
        /* CONSTs cannot be globals or SSVNs */
        if (vn[0] == '^') {
            return GLOBER;
        }
        
        /* move to next position */
        codptr++;	       
        
        /* must initialize CONSTs */
        if (*codptr != '=') {		    
            return ASSIGNER;
        }
        
        /* move past = sign */
        codptr++;
        
        /* grab initialization value */
        expr (STRING);		
        if (merr ()) return merr();
        
        /* at this point, the constant name is in vn
           and the initializer in argptr */
        if (const_is_defined (vn)) {
            return CREDEF;
        }
        
        stcpy (an, argptr);
        symtab (set_sym, vn, an);
        const_define (vn, an);		
	
        /* TODO: call into const-init code */
        
        if ((ch = *(codptr + 1)) == EOL || ch == SP) {
            codptr++;
            break;
        }
        else if (*codptr == ',') {
            codptr++;
        }
        else {
            return CMMND;
        }
        
    }

    *ra = RA_CONTINUE;
    return OK;
}