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Annotation of freem/src/cmd_ksubscripts.c, revision 1.3

1.1       snw         1: /*
1.3     ! snw         2:  *   $Id$
1.1       snw         3:  *    Implementation of the KSUBSCRIPTS command
                      4:  *
                      5:  *  
1.2       snw         6:  *   Author: Serena Willis <snw@coherent-logic.com>
1.1       snw         7:  *    Copyright (C) 1998 MUG Deutschland
                      8:  *    Copyright (C) 2023 Coherent Logic Development LLC
                      9:  *
                     10:  *
                     11:  *   This file is part of FreeM.
                     12:  *
                     13:  *   FreeM is free software: you can redistribute it and/or modify
                     14:  *   it under the terms of the GNU Affero Public License as published by
                     15:  *   the Free Software Foundation, either version 3 of the License, or
                     16:  *   (at your option) any later version.
                     17:  *
                     18:  *   FreeM is distributed in the hope that it will be useful,
                     19:  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
                     20:  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     21:  *   GNU Affero Public License for more details.
                     22:  *
                     23:  *   You should have received a copy of the GNU Affero Public License
                     24:  *   along with FreeM.  If not, see <https://www.gnu.org/licenses/>.
                     25:  *
1.3     ! snw        26:  *   $Log$
        !            27:  *
        !            28:  * SPDX-FileCopyrightText:  (C) 2025 Coherent Logic Development LLC
        !            29:  * SPDX-License-Identifier: AGPL-3.0-or-later
1.1       snw        30:  **/
                     31: 
                     32: #include <string.h>
                     33: #include <stdlib.h>
                     34: #include "mpsdef.h"
                     35: #include "mcommand.h"
                     36: #include "consttbl.h"
                     37: 
                     38: MRESULT cmd_ksubscripts(MACTION *ra)
                     39: {
                     40:     register char ch;
                     41:     char vn[255];   
                     42:     char *old_value;
                     43:     
                     44:     if ((rtn_dialect () != D_FREEM) &&
                     45:         (rtn_dialect () != D_MDS)) {
                     46:         return NOSTAND;
                     47:     }
                     48:     
                     49:     if ((old_value = (char *) malloc (STRLEN * sizeof (char))) == NULL) {
                     50:         return MEMOV;
                     51:     }
                     52:     
                     53:     /* argumentless: KSUBSCRIPTS nukleurrr winturr */
                     54:     if (((ch = *codptr) == SP) || ch == EOL) {
                     55:         write_m ("Argumentless KSUBSCRIPTS not yet implemented.\201");
                     56:         
                     57:         free (old_value);
                     58:         
                     59:         *ra = RA_NEXTCMND;
                     60:         return OK;
                     61:     }
                     62:     
                     63:     
                     64:     if (ch != '(') { /* inclusive KSUBSCRIPTS */
                     65:         
                     66:         for (;;) {
                     67:             expr (NAME);                            /* try to interpret an mname */
                     68:             
                     69:             if (merr ()) return merr ();
                     70:             
                     71:             stcpy (vn, varnam);
                     72:             
                     73:             if (vn[0] != '^') {
                     74:                 symtab (get_sym, vn, old_value);
                     75:                 symtab (kill_sym, vn, NULL);
                     76:                 symtab (set_sym, vn, old_value);
                     77:             }
                     78:             else {
                     79:                 if (vn[1] == '$') {
                     80:                     ssvn (get_sym, vn, old_value);
                     81:                     ssvn (kill_sym, vn, NULL);
                     82:                     ssvn (set_sym, vn, old_value);
                     83:                 }
                     84:                 else {
                     85:                     global (get_sym, vn, old_value);
                     86:                     global (kill_sym, vn, NULL);
                     87:                     global (set_sym, vn, old_value);
                     88:                 }
                     89:             }
                     90:             
                     91:             free (old_value);
                     92:             
                     93:             if (merr ()) return merr ();
                     94:             
                     95:             if ((ch = *(codptr + 1)) == EOL) {
                     96:                 codptr++;
                     97:                 break;
                     98:             }
                     99:             else if (ch == ',') {
                    100:                 codptr += 2;
                    101:             }
                    102:             else {
                    103:                 return CMMND;
                    104:             }
                    105:         } 
                    106:         
                    107:     }
                    108:     else { /* exclusive KSUBSCRIPTS */
                    109:         
                    110:         write_m ("Exclusive KSUBSCRIPTS not yet implemented.\201");
                    111:         
                    112:         while ((ch = *(codptr++)) != SP && ch != EOL) ; /* skip to the end of the command */
                    113:         
                    114:     }
                    115:     
                    116:     *ra = RA_NEXTCMND;
                    117:     return OK;
                    118:                 
                    119: }