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Annotation of freem/src/cmd_if.c, revision 1.1

1.1     ! snw         1: /*
        !             2:  *                            *
        !             3:  *                           * *
        !             4:  *                          *   *
        !             5:  *                     ***************
        !             6:  *                      * *       * *
        !             7:  *                       *  MUMPS  *
        !             8:  *                      * *       * *
        !             9:  *                     ***************
        !            10:  *                          *   *
        !            11:  *                           * *
        !            12:  *                            *
        !            13:  *
        !            14:  *   cmd_if.c
        !            15:  *    Implementation of the IF command
        !            16:  *
        !            17:  *  
        !            18:  *   Author: Serena Willis <jpw@coherent-logic.com>
        !            19:  *    Copyright (C) 1998 MUG Deutschland
        !            20:  *    Copyright (C) 2023 Coherent Logic Development LLC
        !            21:  *
        !            22:  *
        !            23:  *   This file is part of FreeM.
        !            24:  *
        !            25:  *   FreeM is free software: you can redistribute it and/or modify
        !            26:  *   it under the terms of the GNU Affero Public License as published by
        !            27:  *   the Free Software Foundation, either version 3 of the License, or
        !            28:  *   (at your option) any later version.
        !            29:  *
        !            30:  *   FreeM is distributed in the hope that it will be useful,
        !            31:  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
        !            32:  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
        !            33:  *   GNU Affero Public License for more details.
        !            34:  *
        !            35:  *   You should have received a copy of the GNU Affero Public License
        !            36:  *   along with FreeM.  If not, see <https://www.gnu.org/licenses/>.
        !            37:  *
        !            38:  **/
        !            39: 
        !            40: #include <string.h>
        !            41: #include <stdlib.h>
        !            42: #include <ctype.h>
        !            43: #include "mpsdef.h"
        !            44: #include "mcommand.h"
        !            45: 
        !            46: MRESULT cmd_if(MACTION *ra)
        !            47: {
        !            48:     if (*codptr == SP || *codptr == EOL) {           /* no argument form of IF */
        !            49:         if (test) {
        !            50:             *ra = RA_NEXTCMND;
        !            51:             return OK;
        !            52:         }
        !            53:         *ra = RA_SKIPLINE;
        !            54:         return OK;
        !            55:     }
        !            56:     
        !            57:     expr (STRING);
        !            58:     
        !            59:     if (*argptr == '1') {
        !            60:         test = TRUE;
        !            61:         *ra = RA_CONTINUE;
        !            62:         return OK;
        !            63:     }
        !            64:     
        !            65:     if (merr ()) return merr ();
        !            66:     
        !            67:     if (*argptr == '0' && argptr[1] == EOL) {
        !            68:         test = FALSE;
        !            69:         *ra = RA_SKIPLINE;
        !            70:         return OK;
        !            71:     }
        !            72:     
        !            73:     if ((test = tvexpr (argptr)) == FALSE) {
        !            74:         *ra = RA_SKIPLINE;
        !            75:         return OK;
        !            76:     }
        !            77: 
        !            78:     *ra = RA_CONTINUE;
        !            79:     return OK;    
        !            80: }