| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | Copyright 2024 Joel Svensson svenssonjoel@yahoo.se | ||
| 3 | |||
| 4 | This program is free software: you can redistribute it and/or modify | ||
| 5 | it under the terms of the GNU General Public License as published by | ||
| 6 | the Free Software Foundation, either version 3 of the License, or | ||
| 7 | (at your option) any later version. | ||
| 8 | |||
| 9 | This program is distributed in the hope that it will be useful, | ||
| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| 12 | GNU General Public License for more details. | ||
| 13 | |||
| 14 | You should have received a copy of the GNU General Public License | ||
| 15 | along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| 16 | */ | ||
| 17 | |||
| 18 | #include "extensions/set_extensions.h" | ||
| 19 | |||
| 20 | #include "extensions.h" | ||
| 21 | #include "fundamental.h" | ||
| 22 | |||
| 23 | #define ABORT_ON_MERROR(X) if ((X) == ENC_SYM_MERROR) return ENC_SYM_MERROR; | ||
| 24 | |||
| 25 | static lbm_value ext_member(lbm_value *args, lbm_uint argn); | ||
| 26 | static lbm_value ext_set_insert(lbm_value *args, lbm_uint argn); | ||
| 27 | static lbm_value ext_set_union(lbm_value *args, lbm_uint argn); | ||
| 28 | |||
| 29 | ✗ | bool lbm_set_extensions_init(void) { | |
| 30 | ✗ | bool res = true; | |
| 31 | ✗ | res = res && lbm_add_extension("member", ext_member); | |
| 32 | ✗ | res = res && lbm_add_extension("set-insert", ext_set_insert); | |
| 33 | ✗ | res = res && lbm_add_extension("set-union", ext_set_union); | |
| 34 | ✗ | return res; | |
| 35 | } | ||
| 36 | |||
| 37 | ✗ | static lbm_value ext_member(lbm_value *args, lbm_uint argn) { | |
| 38 | ✗ | lbm_value res = ENC_SYM_TERROR; | |
| 39 | ✗ | if (argn == 2 && lbm_is_list(args[0])) { | |
| 40 | ✗ | res = ENC_SYM_NIL; | |
| 41 | ✗ | lbm_value curr = args[0]; | |
| 42 | |||
| 43 | ✗ | while (lbm_is_cons(curr)) { | |
| 44 | ✗ | if (struct_eq(lbm_car(curr), args[1])) { | |
| 45 | ✗ | res = args[0]; | |
| 46 | ✗ | break; | |
| 47 | } | ||
| 48 | ✗ | curr = lbm_cdr(curr); | |
| 49 | } | ||
| 50 | } | ||
| 51 | ✗ | return res; | |
| 52 | } | ||
| 53 | |||
| 54 | ✗ | static lbm_value set_insert(lbm_value set, lbm_value val) { | |
| 55 | |||
| 56 | ✗ | lbm_value end = ENC_SYM_NIL; | |
| 57 | ✗ | lbm_value start = ENC_SYM_NIL; | |
| 58 | |||
| 59 | ✗ | lbm_value curr = set; | |
| 60 | ✗ | while (lbm_is_cons(curr)) { | |
| 61 | ✗ | lbm_value h = lbm_car(curr); | |
| 62 | ✗ | if (struct_eq(lbm_car(curr), val)) { | |
| 63 | ✗ | return set; | |
| 64 | } | ||
| 65 | ✗ | lbm_value cell = lbm_cons(h, ENC_SYM_NIL); | |
| 66 | ✗ | ABORT_ON_MERROR(cell); | |
| 67 | ✗ | if (end == ENC_SYM_NIL) { | |
| 68 | ✗ | end = cell; | |
| 69 | ✗ | start = cell; | |
| 70 | } else { | ||
| 71 | ✗ | lbm_set_cdr(end, cell); | |
| 72 | ✗ | end = cell; | |
| 73 | } | ||
| 74 | ✗ | curr = lbm_cdr(curr); | |
| 75 | } | ||
| 76 | ✗ | lbm_value v = lbm_cons(val, ENC_SYM_NIL); | |
| 77 | ✗ | ABORT_ON_MERROR(v); | |
| 78 | ✗ | if (end == ENC_SYM_NIL) { | |
| 79 | ✗ | start = v; | |
| 80 | } else { | ||
| 81 | ✗ | lbm_set_cdr(end, v); | |
| 82 | } | ||
| 83 | ✗ | return start; | |
| 84 | } | ||
| 85 | |||
| 86 | /* extends a copy of the input set with the new element. */ | ||
| 87 | ✗ | static lbm_value ext_set_insert(lbm_value *args, lbm_uint argn) { | |
| 88 | ✗ | lbm_value res = ENC_SYM_TERROR; | |
| 89 | ✗ | if (argn == 2 && lbm_is_list(args[0])) { | |
| 90 | ✗ | res = set_insert(args[0], args[1]); | |
| 91 | } | ||
| 92 | ✗ | return res; | |
| 93 | } | ||
| 94 | |||
| 95 | |||
| 96 | ✗ | static lbm_value ext_set_union(lbm_value *args, lbm_uint argn) { | |
| 97 | ✗ | lbm_value res = ENC_SYM_TERROR; | |
| 98 | ✗ | if (argn == 2 && lbm_is_list(args[0]) && lbm_is_list(args[1])) { | |
| 99 | ✗ | lbm_value curr = args[0]; | |
| 100 | ✗ | lbm_value set = args[1]; | |
| 101 | |||
| 102 | ✗ | while (lbm_is_cons(curr)) { | |
| 103 | ✗ | set = set_insert(set, lbm_car(curr)); | |
| 104 | ✗ | ABORT_ON_MERROR(set); | |
| 105 | ✗ | curr = lbm_cdr(curr); | |
| 106 | } | ||
| 107 | ✗ | return set; | |
| 108 | } | ||
| 109 | ✗ | return res; | |
| 110 | } | ||
| 111 |