Return to iftab.c CVS log

Up to [Coherent Logic Development] / freem / src

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

1.1     ! snw         1: /*
        !             2:  *                            *
        !             3:  *                           * *
        !             4:  *                          *   *
        !             5:  *                     ***************
        !             6:  *                      * *       * *
        !             7:  *                       *  MUMPS  *
        !             8:  *                      * *       * *
        !             9:  *                     ***************
        !            10:  *                          *   *
        !            11:  *                           * *
        !            12:  *                            *
        !            13:  *
        !            14:  *   iftab.c
        !            15:  *    implementation of the freem transactions-in-flight symbol table
        !            16:  *
        !            17:  *  
        !            18:  *   Author: Serena Willis <jpw@coherent-logic.com>
        !            19:  *    Copyright (C) 1998 MUG Deutschland
        !            20:  *    Copyright (C) 2020 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 <stdlib.h>
        !            41: #include "iftab.h"
        !            42: #include "mpsdef.h"
        !            43: #include "transact.h"
        !            44: 
        !            45: iftab *iftab_head;
        !            46: 
        !            47: iftab *iftab_insert(short action, char *key, char *data, int tlevel)
        !            48: {
        !            49:     iftab *t;
        !            50: 
        !            51:     for (t = iftab_head; t != NULL; t = t->next) {
        !            52:         
        !            53:         if (stcmp (t->key, key) == 0) {
        !            54: 
        !            55:             /* the key already exists. this is now an update. */
        !            56:             free (t->data);
        !            57:            
        !            58:             t->data = malloc (stlen (data) + 1);
        !            59:            NULLPTRCHK(t->data,"iftab_insert");
        !            60:            
        !            61:             stcpy (t->data, data);
        !            62:             t->killed = FALSE;
        !            63: 
        !            64:             return t;
        !            65:         }
        !            66: 
        !            67:     }
        !            68: 
        !            69:     /* key did not exist. this is now a true insert. */
        !            70: 
        !            71:     t = (iftab *) malloc (sizeof (iftab));
        !            72:     NULLPTRCHK(t,"iftab_insert");
        !            73:     
        !            74:     t->key = malloc (stlen (key) + 1);
        !            75:     NULLPTRCHK(t->key,"iftab_insert");
        !            76:     
        !            77:     t->data = malloc (stlen (data) + 1);
        !            78:     NULLPTRCHK(t->data,"iftab_insert");
        !            79: 
        !            80:     stcpy (t->key, key);
        !            81:     stcpy (t->data, data);
        !            82: 
        !            83:     t->killed = FALSE;
        !            84:     t->tlevel = tlevel;
        !            85:     t->action = action;
        !            86: 
        !            87:     t->next = iftab_head;
        !            88:     iftab_head = t;
        !            89: 
        !            90:     return t;
        !            91: }
        !            92: 
        !            93: iftab *iftab_retrieve(char *key, char *data)
        !            94: {
        !            95:     iftab *t;
        !            96: 
        !            97:     for (t = iftab_head; t != NULL; t = t->next) {
        !            98:         if (stcmp (t->key, key) == 0) {
        !            99:            
        !           100:             data = (char *) malloc (stlen (t->data) + 1);
        !           101:            NULLPTRCHK(data,"iftab_retrieve");
        !           102:            
        !           103:             stcpy (data, t->data);
        !           104: 
        !           105:             return t;
        !           106:         }
        !           107:     }
        !           108: 
        !           109:     return (iftab *) NULL;
        !           110: }
        !           111: 
        !           112: void iftab_delete(char *key)
        !           113: {
        !           114:     iftab *t = iftab_head;
        !           115:     iftab *p = NULL;
        !           116: 
        !           117: 
        !           118:     if ((t != (iftab *) NULL) && (stcmp (t->key, key) == 0)) {
        !           119:         iftab_head = t->next;
        !           120: 
        !           121:         free (t->key);
        !           122:         free (t->data);
        !           123:         free (t);
        !           124:         return;
        !           125:     }
        !           126: 
        !           127:     while ((t != NULL) && (stcmp (t->key, key) != 0)) {
        !           128:         p = t;
        !           129:         t = t->next;
        !           130:     }
        !           131: 
        !           132:     if (t == NULL) return;
        !           133: 
        !           134:     p->next = t->next;
        !           135:     free (t->key);
        !           136:     free (t->data);
        !           137:     free (t);
        !           138: 
        !           139:     return;
        !           140: }
        !           141: 
        !           142: iftab *iftab_kill(char *key)
        !           143: {
        !           144:     iftab *t;
        !           145: 
        !           146:     for(t = iftab_head; t != NULL; t = t->next) {
        !           147:         if (stcmp (t->key, key) == 0) {
        !           148:             t->killed = TRUE;
        !           149: 
        !           150:             return t;
        !           151:         }
        !           152:     }
        !           153: 
        !           154:     t = iftab_insert (kill_sym, key, "\201", tp_level);
        !           155:     t->killed = TRUE;
        !           156: 
        !           157:     return t;
        !           158: }
        !           159: 
        !           160: void iftab_pop_tlevel(int tlevel)
        !           161: {
        !           162:     iftab *t;
        !           163: 
        !           164:     for (t = iftab_head; t != NULL; t = t->next) {
        !           165:         if (t->tlevel == tlevel) iftab_delete (t->key);
        !           166:     }
        !           167: }