[270] | 1 | /*
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| 2 | ** variable.c - mruby variables
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| 3 | **
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| 4 | ** See Copyright Notice in mruby.h
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| 5 | */
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| 6 |
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[331] | 7 | #include <mruby.h>
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| 8 | #include <mruby/array.h>
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| 9 | #include <mruby/class.h>
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| 10 | #include <mruby/proc.h>
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| 11 | #include <mruby/string.h>
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[439] | 12 | #include <mruby/variable.h>
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[270] | 13 |
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[439] | 14 | #ifndef MRB_IV_SEGMENT_SIZE
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| 15 | #define MRB_IV_SEGMENT_SIZE 4
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[270] | 16 | #endif
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| 17 |
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| 18 | typedef struct segment {
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[439] | 19 | mrb_sym key[MRB_IV_SEGMENT_SIZE];
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| 20 | mrb_value val[MRB_IV_SEGMENT_SIZE];
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[270] | 21 | struct segment *next;
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| 22 | } segment;
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| 23 |
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| 24 | /* Instance variable table structure */
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| 25 | typedef struct iv_tbl {
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| 26 | segment *rootseg;
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| 27 | size_t size;
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| 28 | size_t last_len;
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| 29 | } iv_tbl;
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| 30 |
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[439] | 31 | /* Creates the instance variable table. */
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[270] | 32 | static iv_tbl*
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| 33 | iv_new(mrb_state *mrb)
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| 34 | {
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| 35 | iv_tbl *t;
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| 36 |
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[331] | 37 | t = (iv_tbl*)mrb_malloc(mrb, sizeof(iv_tbl));
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[270] | 38 | t->size = 0;
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| 39 | t->rootseg = NULL;
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| 40 | t->last_len = 0;
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| 41 |
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| 42 | return t;
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| 43 | }
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| 44 |
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[439] | 45 | /* Set the value for the symbol in the instance variable table. */
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[270] | 46 | static void
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| 47 | iv_put(mrb_state *mrb, iv_tbl *t, mrb_sym sym, mrb_value val)
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| 48 | {
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[439] | 49 | segment *seg;
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[270] | 50 | segment *prev = NULL;
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| 51 | segment *matched_seg = NULL;
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| 52 | size_t matched_idx = 0;
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| 53 | size_t i;
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| 54 |
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[439] | 55 | if (t == NULL) return;
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| 56 | seg = t->rootseg;
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[270] | 57 | while (seg) {
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[439] | 58 | for (i=0; i<MRB_IV_SEGMENT_SIZE; i++) {
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[270] | 59 | mrb_sym key = seg->key[i];
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| 60 | /* Found room in last segment after last_len */
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| 61 | if (!seg->next && i >= t->last_len) {
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| 62 | seg->key[i] = sym;
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| 63 | seg->val[i] = val;
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| 64 | t->last_len = i+1;
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| 65 | t->size++;
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| 66 | return;
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| 67 | }
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| 68 | if (!matched_seg && key == 0) {
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| 69 | matched_seg = seg;
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| 70 | matched_idx = i;
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| 71 | }
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| 72 | else if (key == sym) {
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| 73 | seg->val[i] = val;
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| 74 | return;
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| 75 | }
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| 76 | }
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| 77 | prev = seg;
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| 78 | seg = seg->next;
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| 79 | }
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| 80 |
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| 81 | /* Not found */
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| 82 | if (matched_seg) {
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| 83 | matched_seg->key[matched_idx] = sym;
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| 84 | matched_seg->val[matched_idx] = val;
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[439] | 85 | t->size++;
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[270] | 86 | return;
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| 87 | }
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| 88 |
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[331] | 89 | seg = (segment*)mrb_malloc(mrb, sizeof(segment));
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[270] | 90 | seg->next = NULL;
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| 91 | seg->key[0] = sym;
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| 92 | seg->val[0] = val;
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| 93 | t->last_len = 1;
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[439] | 94 | t->size++;
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[270] | 95 | if (prev) {
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| 96 | prev->next = seg;
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| 97 | }
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| 98 | else {
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| 99 | t->rootseg = seg;
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| 100 | }
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| 101 | }
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| 102 |
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[439] | 103 | /* Get a value for a symbol from the instance variable table. */
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[270] | 104 | static mrb_bool
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| 105 | iv_get(mrb_state *mrb, iv_tbl *t, mrb_sym sym, mrb_value *vp)
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| 106 | {
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| 107 | segment *seg;
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| 108 | size_t i;
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| 109 |
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[439] | 110 | if (t == NULL) return FALSE;
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[270] | 111 | seg = t->rootseg;
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| 112 | while (seg) {
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[439] | 113 | for (i=0; i<MRB_IV_SEGMENT_SIZE; i++) {
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[270] | 114 | mrb_sym key = seg->key[i];
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| 115 |
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| 116 | if (!seg->next && i >= t->last_len) {
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| 117 | return FALSE;
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| 118 | }
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| 119 | if (key == sym) {
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| 120 | if (vp) *vp = seg->val[i];
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| 121 | return TRUE;
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| 122 | }
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| 123 | }
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| 124 | seg = seg->next;
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| 125 | }
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| 126 | return FALSE;
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| 127 | }
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| 128 |
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[439] | 129 | /* Deletes the value for the symbol from the instance variable table. */
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[270] | 130 | static mrb_bool
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| 131 | iv_del(mrb_state *mrb, iv_tbl *t, mrb_sym sym, mrb_value *vp)
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| 132 | {
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| 133 | segment *seg;
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| 134 | size_t i;
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| 135 |
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[439] | 136 | if (t == NULL) return FALSE;
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[270] | 137 | seg = t->rootseg;
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| 138 | while (seg) {
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[439] | 139 | for (i=0; i<MRB_IV_SEGMENT_SIZE; i++) {
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[270] | 140 | mrb_sym key = seg->key[i];
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| 141 |
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| 142 | if (!seg->next && i >= t->last_len) {
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| 143 | return FALSE;
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| 144 | }
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| 145 | if (key == sym) {
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| 146 | t->size--;
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| 147 | seg->key[i] = 0;
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| 148 | if (vp) *vp = seg->val[i];
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| 149 | return TRUE;
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| 150 | }
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| 151 | }
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| 152 | seg = seg->next;
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| 153 | }
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| 154 | return FALSE;
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| 155 | }
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| 156 |
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[439] | 157 | /* Iterates over the instance variable table. */
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| 158 | static void
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| 159 | iv_foreach(mrb_state *mrb, iv_tbl *t, mrb_iv_foreach_func *func, void *p)
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[270] | 160 | {
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| 161 | segment *seg;
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| 162 | size_t i;
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| 163 |
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[439] | 164 | if (t == NULL) return;
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[270] | 165 | seg = t->rootseg;
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| 166 | while (seg) {
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[439] | 167 | for (i=0; i<MRB_IV_SEGMENT_SIZE; i++) {
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[270] | 168 | mrb_sym key = seg->key[i];
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| 169 |
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| 170 | /* no value in last segment after last_len */
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| 171 | if (!seg->next && i >= t->last_len) {
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[439] | 172 | return;
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[270] | 173 | }
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| 174 | if (key != 0) {
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[439] | 175 | if ((*func)(mrb, key, seg->val[i], p) != 0) {
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| 176 | return;
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[270] | 177 | }
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| 178 | }
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| 179 | }
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| 180 | seg = seg->next;
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| 181 | }
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[439] | 182 | return;
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[270] | 183 | }
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| 184 |
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[439] | 185 | /* Get the size of the instance variable table. */
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[270] | 186 | static size_t
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| 187 | iv_size(mrb_state *mrb, iv_tbl *t)
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| 188 | {
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| 189 | segment *seg;
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| 190 | size_t size = 0;
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| 191 |
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[439] | 192 | if (t == NULL) return 0;
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[270] | 193 | if (t->size > 0) return t->size;
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| 194 | seg = t->rootseg;
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| 195 | while (seg) {
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| 196 | if (seg->next == NULL) {
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| 197 | size += t->last_len;
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| 198 | return size;
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| 199 | }
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| 200 | seg = seg->next;
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[439] | 201 | size += MRB_IV_SEGMENT_SIZE;
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[270] | 202 | }
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| 203 | /* empty iv_tbl */
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| 204 | return 0;
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| 205 | }
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| 206 |
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[439] | 207 | /* Copy the instance variable table. */
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[270] | 208 | static iv_tbl*
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| 209 | iv_copy(mrb_state *mrb, iv_tbl *t)
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| 210 | {
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| 211 | segment *seg;
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| 212 | iv_tbl *t2;
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| 213 |
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| 214 | size_t i;
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| 215 |
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| 216 | seg = t->rootseg;
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| 217 | t2 = iv_new(mrb);
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| 218 |
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| 219 | while (seg != NULL) {
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[439] | 220 | for (i=0; i<MRB_IV_SEGMENT_SIZE; i++) {
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[270] | 221 | mrb_sym key = seg->key[i];
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| 222 | mrb_value val = seg->val[i];
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| 223 |
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| 224 | if ((seg->next == NULL) && (i >= t->last_len)) {
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| 225 | return t2;
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| 226 | }
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| 227 | iv_put(mrb, t2, key, val);
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| 228 | }
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| 229 | seg = seg->next;
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| 230 | }
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| 231 | return t2;
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| 232 | }
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| 233 |
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[439] | 234 | /* Free memory of the instance variable table. */
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[270] | 235 | static void
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| 236 | iv_free(mrb_state *mrb, iv_tbl *t)
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| 237 | {
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| 238 | segment *seg;
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| 239 |
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| 240 | seg = t->rootseg;
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| 241 | while (seg) {
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| 242 | segment *p = seg;
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| 243 | seg = seg->next;
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| 244 | mrb_free(mrb, p);
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| 245 | }
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| 246 | mrb_free(mrb, t);
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| 247 | }
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| 248 |
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| 249 | static int
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| 250 | iv_mark_i(mrb_state *mrb, mrb_sym sym, mrb_value v, void *p)
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| 251 | {
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| 252 | mrb_gc_mark_value(mrb, v);
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| 253 | return 0;
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| 254 | }
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| 255 |
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| 256 | static void
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| 257 | mark_tbl(mrb_state *mrb, iv_tbl *t)
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| 258 | {
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[439] | 259 | iv_foreach(mrb, t, iv_mark_i, 0);
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[270] | 260 | }
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| 261 |
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| 262 | void
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| 263 | mrb_gc_mark_gv(mrb_state *mrb)
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| 264 | {
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| 265 | mark_tbl(mrb, mrb->globals);
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| 266 | }
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| 267 |
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| 268 | void
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| 269 | mrb_gc_free_gv(mrb_state *mrb)
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| 270 | {
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| 271 | if (mrb->globals)
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| 272 | iv_free(mrb, mrb->globals);
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| 273 | }
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| 274 |
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| 275 | void
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| 276 | mrb_gc_mark_iv(mrb_state *mrb, struct RObject *obj)
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| 277 | {
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| 278 | mark_tbl(mrb, obj->iv);
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| 279 | }
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| 280 |
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| 281 | size_t
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| 282 | mrb_gc_mark_iv_size(mrb_state *mrb, struct RObject *obj)
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| 283 | {
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| 284 | return iv_size(mrb, obj->iv);
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| 285 | }
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| 286 |
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| 287 | void
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| 288 | mrb_gc_free_iv(mrb_state *mrb, struct RObject *obj)
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| 289 | {
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| 290 | if (obj->iv) {
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| 291 | iv_free(mrb, obj->iv);
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| 292 | }
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| 293 | }
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| 294 |
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| 295 | mrb_value
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| 296 | mrb_vm_special_get(mrb_state *mrb, mrb_sym i)
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| 297 | {
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| 298 | return mrb_fixnum_value(0);
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| 299 | }
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| 300 |
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| 301 | void
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| 302 | mrb_vm_special_set(mrb_state *mrb, mrb_sym i, mrb_value v)
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| 303 | {
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| 304 | }
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| 305 |
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| 306 | static mrb_bool
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| 307 | obj_iv_p(mrb_value obj)
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| 308 | {
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| 309 | switch (mrb_type(obj)) {
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| 310 | case MRB_TT_OBJECT:
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| 311 | case MRB_TT_CLASS:
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| 312 | case MRB_TT_MODULE:
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| 313 | case MRB_TT_SCLASS:
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| 314 | case MRB_TT_HASH:
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| 315 | case MRB_TT_DATA:
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| 316 | case MRB_TT_EXCEPTION:
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| 317 | return TRUE;
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| 318 | default:
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| 319 | return FALSE;
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| 320 | }
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| 321 | }
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| 322 |
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| 323 | MRB_API mrb_value
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| 324 | mrb_obj_iv_get(mrb_state *mrb, struct RObject *obj, mrb_sym sym)
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| 325 | {
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| 326 | mrb_value v;
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| 327 |
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| 328 | if (obj->iv && iv_get(mrb, obj->iv, sym, &v))
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| 329 | return v;
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| 330 | return mrb_nil_value();
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| 331 | }
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| 332 |
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| 333 | MRB_API mrb_value
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| 334 | mrb_iv_get(mrb_state *mrb, mrb_value obj, mrb_sym sym)
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| 335 | {
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| 336 | if (obj_iv_p(obj)) {
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| 337 | return mrb_obj_iv_get(mrb, mrb_obj_ptr(obj), sym);
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| 338 | }
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| 339 | return mrb_nil_value();
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| 340 | }
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| 341 |
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[439] | 342 | static inline void assign_class_name(mrb_state *mrb, struct RObject *obj, mrb_sym sym, mrb_value v);
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| 343 |
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| 344 | void
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| 345 | mrb_obj_iv_set_force(mrb_state *mrb, struct RObject *obj, mrb_sym sym, mrb_value v)
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[270] | 346 | {
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[439] | 347 | assign_class_name(mrb, obj, sym, v);
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| 348 | if (!obj->iv) {
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| 349 | obj->iv = iv_new(mrb);
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[331] | 350 | }
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[439] | 351 | iv_put(mrb, obj->iv, sym, v);
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[270] | 352 | mrb_write_barrier(mrb, (struct RBasic*)obj);
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| 353 | }
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| 354 |
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| 355 | MRB_API void
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[439] | 356 | mrb_obj_iv_set(mrb_state *mrb, struct RObject *obj, mrb_sym sym, mrb_value v)
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[270] | 357 | {
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[439] | 358 | mrb_check_frozen(mrb, obj);
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| 359 | mrb_obj_iv_set_force(mrb, obj, sym, v);
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| 360 | }
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[270] | 361 |
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[439] | 362 | /* Iterates over the instance variable table. */
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| 363 | MRB_API void
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| 364 | mrb_iv_foreach(mrb_state *mrb, mrb_value obj, mrb_iv_foreach_func *func, void *p)
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| 365 | {
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| 366 | if (!obj_iv_p(obj)) return;
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| 367 | iv_foreach(mrb, mrb_obj_ptr(obj)->iv, func, p);
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| 368 | }
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| 369 |
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| 370 | static inline mrb_bool
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| 371 | namespace_p(enum mrb_vtype tt)
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| 372 | {
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| 373 | return tt == MRB_TT_CLASS || tt == MRB_TT_MODULE ? TRUE : FALSE;
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| 374 | }
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| 375 |
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| 376 | static inline void
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| 377 | assign_class_name(mrb_state *mrb, struct RObject *obj, mrb_sym sym, mrb_value v)
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| 378 | {
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| 379 | if (namespace_p(obj->tt) && namespace_p(mrb_type(v))) {
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| 380 | struct RObject *c = mrb_obj_ptr(v);
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| 381 | if (obj != c && ISUPPER(mrb_sym_name_len(mrb, sym, NULL)[0])) {
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| 382 | mrb_sym id_classname = mrb_intern_lit(mrb, "__classname__");
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| 383 | mrb_value o = mrb_obj_iv_get(mrb, c, id_classname);
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| 384 |
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| 385 | if (mrb_nil_p(o)) {
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| 386 | mrb_sym id_outer = mrb_intern_lit(mrb, "__outer__");
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| 387 | o = mrb_obj_iv_get(mrb, c, id_outer);
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| 388 |
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| 389 | if (mrb_nil_p(o)) {
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| 390 | if ((struct RClass *)obj == mrb->object_class) {
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| 391 | mrb_obj_iv_set_force(mrb, c, id_classname, mrb_symbol_value(sym));
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| 392 | }
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| 393 | else {
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| 394 | mrb_obj_iv_set_force(mrb, c, id_outer, mrb_obj_value(obj));
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| 395 | }
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| 396 | }
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| 397 | }
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| 398 | }
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[270] | 399 | }
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| 400 | }
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| 401 |
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| 402 | MRB_API void
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| 403 | mrb_iv_set(mrb_state *mrb, mrb_value obj, mrb_sym sym, mrb_value v)
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| 404 | {
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| 405 | if (obj_iv_p(obj)) {
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| 406 | mrb_obj_iv_set(mrb, mrb_obj_ptr(obj), sym, v);
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| 407 | }
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| 408 | else {
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| 409 | mrb_raise(mrb, E_ARGUMENT_ERROR, "cannot set instance variable");
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| 410 | }
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| 411 | }
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| 412 |
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| 413 | MRB_API mrb_bool
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| 414 | mrb_obj_iv_defined(mrb_state *mrb, struct RObject *obj, mrb_sym sym)
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| 415 | {
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| 416 | iv_tbl *t;
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| 417 |
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| 418 | t = obj->iv;
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| 419 | if (t) {
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| 420 | return iv_get(mrb, t, sym, NULL);
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| 421 | }
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| 422 | return FALSE;
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| 423 | }
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| 424 |
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| 425 | MRB_API mrb_bool
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| 426 | mrb_iv_defined(mrb_state *mrb, mrb_value obj, mrb_sym sym)
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| 427 | {
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| 428 | if (!obj_iv_p(obj)) return FALSE;
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| 429 | return mrb_obj_iv_defined(mrb, mrb_obj_ptr(obj), sym);
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| 430 | }
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| 431 |
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| 432 | MRB_API mrb_bool
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[439] | 433 | mrb_iv_name_sym_p(mrb_state *mrb, mrb_sym iv_name)
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[270] | 434 | {
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| 435 | const char *s;
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[439] | 436 | mrb_int len;
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[270] | 437 |
|
---|
[439] | 438 | s = mrb_sym_name_len(mrb, iv_name, &len);
|
---|
[270] | 439 | if (len < 2) return FALSE;
|
---|
| 440 | if (s[0] != '@') return FALSE;
|
---|
[439] | 441 | if (ISDIGIT(s[1])) return FALSE;
|
---|
| 442 | return mrb_ident_p(s+1, len-1);
|
---|
[270] | 443 | }
|
---|
| 444 |
|
---|
| 445 | MRB_API void
|
---|
[439] | 446 | mrb_iv_name_sym_check(mrb_state *mrb, mrb_sym iv_name)
|
---|
[270] | 447 | {
|
---|
[439] | 448 | if (!mrb_iv_name_sym_p(mrb, iv_name)) {
|
---|
| 449 | mrb_name_error(mrb, iv_name, "'%n' is not allowed as an instance variable name", iv_name);
|
---|
[270] | 450 | }
|
---|
| 451 | }
|
---|
| 452 |
|
---|
| 453 | MRB_API void
|
---|
| 454 | mrb_iv_copy(mrb_state *mrb, mrb_value dest, mrb_value src)
|
---|
| 455 | {
|
---|
| 456 | struct RObject *d = mrb_obj_ptr(dest);
|
---|
| 457 | struct RObject *s = mrb_obj_ptr(src);
|
---|
| 458 |
|
---|
| 459 | if (d->iv) {
|
---|
| 460 | iv_free(mrb, d->iv);
|
---|
| 461 | d->iv = 0;
|
---|
| 462 | }
|
---|
| 463 | if (s->iv) {
|
---|
| 464 | mrb_write_barrier(mrb, (struct RBasic*)d);
|
---|
| 465 | d->iv = iv_copy(mrb, s->iv);
|
---|
| 466 | }
|
---|
| 467 | }
|
---|
| 468 |
|
---|
| 469 | static int
|
---|
| 470 | inspect_i(mrb_state *mrb, mrb_sym sym, mrb_value v, void *p)
|
---|
| 471 | {
|
---|
| 472 | mrb_value str = *(mrb_value*)p;
|
---|
| 473 | const char *s;
|
---|
| 474 | mrb_int len;
|
---|
| 475 | mrb_value ins;
|
---|
| 476 | char *sp = RSTRING_PTR(str);
|
---|
| 477 |
|
---|
| 478 | /* need not to show internal data */
|
---|
| 479 | if (sp[0] == '-') { /* first element */
|
---|
| 480 | sp[0] = '#';
|
---|
| 481 | mrb_str_cat_lit(mrb, str, " ");
|
---|
| 482 | }
|
---|
| 483 | else {
|
---|
| 484 | mrb_str_cat_lit(mrb, str, ", ");
|
---|
| 485 | }
|
---|
[439] | 486 | s = mrb_sym_name_len(mrb, sym, &len);
|
---|
[270] | 487 | mrb_str_cat(mrb, str, s, len);
|
---|
| 488 | mrb_str_cat_lit(mrb, str, "=");
|
---|
[439] | 489 | if (mrb_object_p(v)) {
|
---|
[270] | 490 | ins = mrb_any_to_s(mrb, v);
|
---|
| 491 | }
|
---|
| 492 | else {
|
---|
| 493 | ins = mrb_inspect(mrb, v);
|
---|
| 494 | }
|
---|
| 495 | mrb_str_cat_str(mrb, str, ins);
|
---|
| 496 | return 0;
|
---|
| 497 | }
|
---|
| 498 |
|
---|
| 499 | mrb_value
|
---|
| 500 | mrb_obj_iv_inspect(mrb_state *mrb, struct RObject *obj)
|
---|
| 501 | {
|
---|
| 502 | iv_tbl *t = obj->iv;
|
---|
| 503 | size_t len = iv_size(mrb, t);
|
---|
| 504 |
|
---|
| 505 | if (len > 0) {
|
---|
| 506 | const char *cn = mrb_obj_classname(mrb, mrb_obj_value(obj));
|
---|
[439] | 507 | mrb_value str = mrb_str_new_capa(mrb, 30);
|
---|
[270] | 508 |
|
---|
| 509 | mrb_str_cat_lit(mrb, str, "-<");
|
---|
| 510 | mrb_str_cat_cstr(mrb, str, cn);
|
---|
| 511 | mrb_str_cat_lit(mrb, str, ":");
|
---|
[439] | 512 | mrb_str_cat_str(mrb, str, mrb_ptr_to_str(mrb, obj));
|
---|
[270] | 513 |
|
---|
| 514 | iv_foreach(mrb, t, inspect_i, &str);
|
---|
| 515 | mrb_str_cat_lit(mrb, str, ">");
|
---|
| 516 | return str;
|
---|
| 517 | }
|
---|
| 518 | return mrb_any_to_s(mrb, mrb_obj_value(obj));
|
---|
| 519 | }
|
---|
| 520 |
|
---|
| 521 | MRB_API mrb_value
|
---|
| 522 | mrb_iv_remove(mrb_state *mrb, mrb_value obj, mrb_sym sym)
|
---|
| 523 | {
|
---|
| 524 | if (obj_iv_p(obj)) {
|
---|
| 525 | iv_tbl *t = mrb_obj_ptr(obj)->iv;
|
---|
| 526 | mrb_value val;
|
---|
| 527 |
|
---|
[439] | 528 | mrb_check_frozen(mrb, mrb_obj_ptr(obj));
|
---|
| 529 | if (iv_del(mrb, t, sym, &val)) {
|
---|
[270] | 530 | return val;
|
---|
| 531 | }
|
---|
| 532 | }
|
---|
| 533 | return mrb_undef_value();
|
---|
| 534 | }
|
---|
| 535 |
|
---|
| 536 | static int
|
---|
| 537 | iv_i(mrb_state *mrb, mrb_sym sym, mrb_value v, void *p)
|
---|
| 538 | {
|
---|
| 539 | mrb_value ary;
|
---|
| 540 | const char* s;
|
---|
| 541 | mrb_int len;
|
---|
| 542 |
|
---|
| 543 | ary = *(mrb_value*)p;
|
---|
[439] | 544 | s = mrb_sym_name_len(mrb, sym, &len);
|
---|
[270] | 545 | if (len > 1 && s[0] == '@' && s[1] != '@') {
|
---|
| 546 | mrb_ary_push(mrb, ary, mrb_symbol_value(sym));
|
---|
| 547 | }
|
---|
| 548 | return 0;
|
---|
| 549 | }
|
---|
| 550 |
|
---|
| 551 | /* 15.3.1.3.23 */
|
---|
| 552 | /*
|
---|
| 553 | * call-seq:
|
---|
| 554 | * obj.instance_variables -> array
|
---|
| 555 | *
|
---|
| 556 | * Returns an array of instance variable names for the receiver. Note
|
---|
| 557 | * that simply defining an accessor does not create the corresponding
|
---|
| 558 | * instance variable.
|
---|
| 559 | *
|
---|
| 560 | * class Fred
|
---|
| 561 | * attr_accessor :a1
|
---|
| 562 | * def initialize
|
---|
| 563 | * @iv = 3
|
---|
| 564 | * end
|
---|
| 565 | * end
|
---|
| 566 | * Fred.new.instance_variables #=> [:@iv]
|
---|
| 567 | */
|
---|
| 568 | mrb_value
|
---|
| 569 | mrb_obj_instance_variables(mrb_state *mrb, mrb_value self)
|
---|
| 570 | {
|
---|
| 571 | mrb_value ary;
|
---|
| 572 |
|
---|
| 573 | ary = mrb_ary_new(mrb);
|
---|
[439] | 574 | if (obj_iv_p(self)) {
|
---|
[270] | 575 | iv_foreach(mrb, mrb_obj_ptr(self)->iv, iv_i, &ary);
|
---|
| 576 | }
|
---|
| 577 | return ary;
|
---|
| 578 | }
|
---|
| 579 |
|
---|
| 580 | static int
|
---|
| 581 | cv_i(mrb_state *mrb, mrb_sym sym, mrb_value v, void *p)
|
---|
| 582 | {
|
---|
| 583 | mrb_value ary;
|
---|
| 584 | const char* s;
|
---|
| 585 | mrb_int len;
|
---|
| 586 |
|
---|
| 587 | ary = *(mrb_value*)p;
|
---|
[439] | 588 | s = mrb_sym_name_len(mrb, sym, &len);
|
---|
[270] | 589 | if (len > 2 && s[0] == '@' && s[1] == '@') {
|
---|
| 590 | mrb_ary_push(mrb, ary, mrb_symbol_value(sym));
|
---|
| 591 | }
|
---|
| 592 | return 0;
|
---|
| 593 | }
|
---|
| 594 |
|
---|
| 595 | /* 15.2.2.4.19 */
|
---|
| 596 | /*
|
---|
| 597 | * call-seq:
|
---|
[439] | 598 | * mod.class_variables(inherit=true) -> array
|
---|
[270] | 599 | *
|
---|
| 600 | * Returns an array of the names of class variables in <i>mod</i>.
|
---|
| 601 | *
|
---|
| 602 | * class One
|
---|
| 603 | * @@var1 = 1
|
---|
| 604 | * end
|
---|
| 605 | * class Two < One
|
---|
| 606 | * @@var2 = 2
|
---|
| 607 | * end
|
---|
| 608 | * One.class_variables #=> [:@@var1]
|
---|
| 609 | * Two.class_variables #=> [:@@var2]
|
---|
| 610 | */
|
---|
| 611 | mrb_value
|
---|
| 612 | mrb_mod_class_variables(mrb_state *mrb, mrb_value mod)
|
---|
| 613 | {
|
---|
| 614 | mrb_value ary;
|
---|
| 615 | struct RClass *c;
|
---|
[439] | 616 | mrb_bool inherit = TRUE;
|
---|
[270] | 617 |
|
---|
[439] | 618 | mrb_get_args(mrb, "|b", &inherit);
|
---|
[270] | 619 | ary = mrb_ary_new(mrb);
|
---|
| 620 | c = mrb_class_ptr(mod);
|
---|
| 621 | while (c) {
|
---|
[439] | 622 | iv_foreach(mrb, c->iv, cv_i, &ary);
|
---|
| 623 | if (!inherit) break;
|
---|
[270] | 624 | c = c->super;
|
---|
| 625 | }
|
---|
| 626 | return ary;
|
---|
| 627 | }
|
---|
| 628 |
|
---|
[439] | 629 | mrb_value
|
---|
[331] | 630 | mrb_mod_cv_get(mrb_state *mrb, struct RClass *c, mrb_sym sym)
|
---|
[270] | 631 | {
|
---|
| 632 | struct RClass * cls = c;
|
---|
| 633 | mrb_value v;
|
---|
[331] | 634 | int given = FALSE;
|
---|
[270] | 635 |
|
---|
| 636 | while (c) {
|
---|
| 637 | if (c->iv && iv_get(mrb, c->iv, sym, &v)) {
|
---|
[331] | 638 | given = TRUE;
|
---|
[270] | 639 | }
|
---|
| 640 | c = c->super;
|
---|
| 641 | }
|
---|
[331] | 642 | if (given) return v;
|
---|
[270] | 643 | if (cls && cls->tt == MRB_TT_SCLASS) {
|
---|
| 644 | mrb_value klass;
|
---|
| 645 |
|
---|
| 646 | klass = mrb_obj_iv_get(mrb, (struct RObject *)cls,
|
---|
| 647 | mrb_intern_lit(mrb, "__attached__"));
|
---|
| 648 | c = mrb_class_ptr(klass);
|
---|
[331] | 649 | if (c->tt == MRB_TT_CLASS || c->tt == MRB_TT_MODULE) {
|
---|
| 650 | given = FALSE;
|
---|
[270] | 651 | while (c) {
|
---|
| 652 | if (c->iv && iv_get(mrb, c->iv, sym, &v)) {
|
---|
[331] | 653 | given = TRUE;
|
---|
[270] | 654 | }
|
---|
| 655 | c = c->super;
|
---|
| 656 | }
|
---|
[331] | 657 | if (given) return v;
|
---|
[270] | 658 | }
|
---|
| 659 | }
|
---|
[439] | 660 | mrb_name_error(mrb, sym, "uninitialized class variable %n in %C", sym, cls);
|
---|
[270] | 661 | /* not reached */
|
---|
| 662 | return mrb_nil_value();
|
---|
| 663 | }
|
---|
| 664 |
|
---|
| 665 | MRB_API mrb_value
|
---|
| 666 | mrb_cv_get(mrb_state *mrb, mrb_value mod, mrb_sym sym)
|
---|
| 667 | {
|
---|
| 668 | return mrb_mod_cv_get(mrb, mrb_class_ptr(mod), sym);
|
---|
| 669 | }
|
---|
| 670 |
|
---|
| 671 | MRB_API void
|
---|
| 672 | mrb_mod_cv_set(mrb_state *mrb, struct RClass *c, mrb_sym sym, mrb_value v)
|
---|
| 673 | {
|
---|
| 674 | struct RClass * cls = c;
|
---|
| 675 |
|
---|
| 676 | while (c) {
|
---|
[439] | 677 | iv_tbl *t = c->iv;
|
---|
[270] | 678 |
|
---|
[439] | 679 | if (iv_get(mrb, t, sym, NULL)) {
|
---|
| 680 | mrb_check_frozen(mrb, c);
|
---|
| 681 | iv_put(mrb, t, sym, v);
|
---|
| 682 | mrb_write_barrier(mrb, (struct RBasic*)c);
|
---|
| 683 | return;
|
---|
[270] | 684 | }
|
---|
| 685 | c = c->super;
|
---|
| 686 | }
|
---|
| 687 |
|
---|
[331] | 688 | if (cls && cls->tt == MRB_TT_SCLASS) {
|
---|
| 689 | mrb_value klass;
|
---|
| 690 |
|
---|
| 691 | klass = mrb_obj_iv_get(mrb, (struct RObject*)cls,
|
---|
| 692 | mrb_intern_lit(mrb, "__attached__"));
|
---|
| 693 | switch (mrb_type(klass)) {
|
---|
| 694 | case MRB_TT_CLASS:
|
---|
| 695 | case MRB_TT_MODULE:
|
---|
| 696 | case MRB_TT_SCLASS:
|
---|
| 697 | c = mrb_class_ptr(klass);
|
---|
| 698 | break;
|
---|
| 699 | default:
|
---|
| 700 | c = cls;
|
---|
| 701 | break;
|
---|
| 702 | }
|
---|
[270] | 703 | }
|
---|
[331] | 704 | else{
|
---|
| 705 | c = cls;
|
---|
| 706 | }
|
---|
[270] | 707 |
|
---|
[439] | 708 | mrb_check_frozen(mrb, c);
|
---|
[331] | 709 | if (!c->iv) {
|
---|
| 710 | c->iv = iv_new(mrb);
|
---|
| 711 | }
|
---|
| 712 |
|
---|
[439] | 713 | iv_put(mrb, c->iv, sym, v);
|
---|
[331] | 714 | mrb_write_barrier(mrb, (struct RBasic*)c);
|
---|
[270] | 715 | }
|
---|
| 716 |
|
---|
| 717 | MRB_API void
|
---|
| 718 | mrb_cv_set(mrb_state *mrb, mrb_value mod, mrb_sym sym, mrb_value v)
|
---|
| 719 | {
|
---|
| 720 | mrb_mod_cv_set(mrb, mrb_class_ptr(mod), sym, v);
|
---|
| 721 | }
|
---|
| 722 |
|
---|
[439] | 723 | mrb_bool
|
---|
[270] | 724 | mrb_mod_cv_defined(mrb_state *mrb, struct RClass * c, mrb_sym sym)
|
---|
| 725 | {
|
---|
| 726 | while (c) {
|
---|
[439] | 727 | iv_tbl *t = c->iv;
|
---|
| 728 | if (iv_get(mrb, t, sym, NULL)) return TRUE;
|
---|
[270] | 729 | c = c->super;
|
---|
| 730 | }
|
---|
| 731 |
|
---|
| 732 | return FALSE;
|
---|
| 733 | }
|
---|
| 734 |
|
---|
| 735 | MRB_API mrb_bool
|
---|
| 736 | mrb_cv_defined(mrb_state *mrb, mrb_value mod, mrb_sym sym)
|
---|
| 737 | {
|
---|
| 738 | return mrb_mod_cv_defined(mrb, mrb_class_ptr(mod), sym);
|
---|
| 739 | }
|
---|
| 740 |
|
---|
| 741 | mrb_value
|
---|
| 742 | mrb_vm_cv_get(mrb_state *mrb, mrb_sym sym)
|
---|
| 743 | {
|
---|
[439] | 744 | struct RClass *c;
|
---|
[270] | 745 |
|
---|
[439] | 746 | struct RProc *p = mrb->c->ci->proc;
|
---|
[270] | 747 |
|
---|
[439] | 748 | for (;;) {
|
---|
| 749 | c = MRB_PROC_TARGET_CLASS(p);
|
---|
| 750 | if (c->tt != MRB_TT_SCLASS) break;
|
---|
| 751 | p = p->upper;
|
---|
| 752 | }
|
---|
[270] | 753 | return mrb_mod_cv_get(mrb, c, sym);
|
---|
| 754 | }
|
---|
| 755 |
|
---|
| 756 | void
|
---|
| 757 | mrb_vm_cv_set(mrb_state *mrb, mrb_sym sym, mrb_value v)
|
---|
| 758 | {
|
---|
[439] | 759 | struct RClass *c;
|
---|
| 760 | struct RProc *p = mrb->c->ci->proc;
|
---|
[270] | 761 |
|
---|
[439] | 762 | for (;;) {
|
---|
| 763 | c = MRB_PROC_TARGET_CLASS(p);
|
---|
| 764 | if (c->tt != MRB_TT_SCLASS) break;
|
---|
| 765 | p = p->upper;
|
---|
| 766 | }
|
---|
[270] | 767 | mrb_mod_cv_set(mrb, c, sym, v);
|
---|
| 768 | }
|
---|
| 769 |
|
---|
| 770 | static void
|
---|
| 771 | mod_const_check(mrb_state *mrb, mrb_value mod)
|
---|
| 772 | {
|
---|
| 773 | switch (mrb_type(mod)) {
|
---|
| 774 | case MRB_TT_CLASS:
|
---|
| 775 | case MRB_TT_MODULE:
|
---|
| 776 | case MRB_TT_SCLASS:
|
---|
| 777 | break;
|
---|
| 778 | default:
|
---|
| 779 | mrb_raise(mrb, E_TYPE_ERROR, "constant look-up for non class/module");
|
---|
| 780 | break;
|
---|
| 781 | }
|
---|
| 782 | }
|
---|
| 783 |
|
---|
| 784 | static mrb_value
|
---|
| 785 | const_get(mrb_state *mrb, struct RClass *base, mrb_sym sym)
|
---|
| 786 | {
|
---|
| 787 | struct RClass *c = base;
|
---|
| 788 | mrb_value v;
|
---|
| 789 | mrb_bool retry = FALSE;
|
---|
| 790 | mrb_value name;
|
---|
| 791 |
|
---|
| 792 | L_RETRY:
|
---|
| 793 | while (c) {
|
---|
| 794 | if (c->iv) {
|
---|
[439] | 795 | if (iv_get(mrb, c->iv, sym, &v))
|
---|
[270] | 796 | return v;
|
---|
| 797 | }
|
---|
| 798 | c = c->super;
|
---|
| 799 | }
|
---|
[439] | 800 | if (!retry && base->tt == MRB_TT_MODULE) {
|
---|
[270] | 801 | c = mrb->object_class;
|
---|
| 802 | retry = TRUE;
|
---|
| 803 | goto L_RETRY;
|
---|
| 804 | }
|
---|
| 805 | name = mrb_symbol_value(sym);
|
---|
| 806 | return mrb_funcall_argv(mrb, mrb_obj_value(base), mrb_intern_lit(mrb, "const_missing"), 1, &name);
|
---|
| 807 | }
|
---|
| 808 |
|
---|
| 809 | MRB_API mrb_value
|
---|
| 810 | mrb_const_get(mrb_state *mrb, mrb_value mod, mrb_sym sym)
|
---|
| 811 | {
|
---|
| 812 | mod_const_check(mrb, mod);
|
---|
| 813 | return const_get(mrb, mrb_class_ptr(mod), sym);
|
---|
| 814 | }
|
---|
| 815 |
|
---|
| 816 | mrb_value
|
---|
| 817 | mrb_vm_const_get(mrb_state *mrb, mrb_sym sym)
|
---|
| 818 | {
|
---|
[439] | 819 | struct RClass *c;
|
---|
| 820 | struct RClass *c2;
|
---|
| 821 | mrb_value v;
|
---|
| 822 | struct RProc *proc;
|
---|
[270] | 823 |
|
---|
[439] | 824 | c = MRB_PROC_TARGET_CLASS(mrb->c->ci->proc);
|
---|
| 825 | if (iv_get(mrb, c->iv, sym, &v)) {
|
---|
| 826 | return v;
|
---|
| 827 | }
|
---|
| 828 | c2 = c;
|
---|
| 829 | while (c2 && c2->tt == MRB_TT_SCLASS) {
|
---|
| 830 | mrb_value klass;
|
---|
[270] | 831 |
|
---|
[439] | 832 | if (!iv_get(mrb, c2->iv, mrb_intern_lit(mrb, "__attached__"), &klass)) {
|
---|
| 833 | c2 = NULL;
|
---|
| 834 | break;
|
---|
| 835 | }
|
---|
| 836 | c2 = mrb_class_ptr(klass);
|
---|
| 837 | }
|
---|
| 838 | if (c2 && (c2->tt == MRB_TT_CLASS || c2->tt == MRB_TT_MODULE)) c = c2;
|
---|
| 839 | mrb_assert(!MRB_PROC_CFUNC_P(mrb->c->ci->proc));
|
---|
| 840 | proc = mrb->c->ci->proc;
|
---|
| 841 | while (proc) {
|
---|
| 842 | c2 = MRB_PROC_TARGET_CLASS(proc);
|
---|
| 843 | if (c2 && iv_get(mrb, c2->iv, sym, &v)) {
|
---|
[270] | 844 | return v;
|
---|
| 845 | }
|
---|
[439] | 846 | proc = proc->upper;
|
---|
[270] | 847 | }
|
---|
| 848 | return const_get(mrb, c, sym);
|
---|
| 849 | }
|
---|
| 850 |
|
---|
| 851 | MRB_API void
|
---|
| 852 | mrb_const_set(mrb_state *mrb, mrb_value mod, mrb_sym sym, mrb_value v)
|
---|
| 853 | {
|
---|
| 854 | mod_const_check(mrb, mod);
|
---|
[439] | 855 | if (mrb_type(v) == MRB_TT_CLASS || mrb_type(v) == MRB_TT_MODULE) {
|
---|
| 856 | mrb_class_name_class(mrb, mrb_class_ptr(mod), mrb_class_ptr(v), sym);
|
---|
| 857 | }
|
---|
[270] | 858 | mrb_iv_set(mrb, mod, sym, v);
|
---|
| 859 | }
|
---|
| 860 |
|
---|
| 861 | void
|
---|
| 862 | mrb_vm_const_set(mrb_state *mrb, mrb_sym sym, mrb_value v)
|
---|
| 863 | {
|
---|
[439] | 864 | struct RClass *c;
|
---|
[270] | 865 |
|
---|
[439] | 866 | c = MRB_PROC_TARGET_CLASS(mrb->c->ci->proc);
|
---|
[270] | 867 | mrb_obj_iv_set(mrb, (struct RObject*)c, sym, v);
|
---|
| 868 | }
|
---|
| 869 |
|
---|
| 870 | MRB_API void
|
---|
| 871 | mrb_const_remove(mrb_state *mrb, mrb_value mod, mrb_sym sym)
|
---|
| 872 | {
|
---|
| 873 | mod_const_check(mrb, mod);
|
---|
| 874 | mrb_iv_remove(mrb, mod, sym);
|
---|
| 875 | }
|
---|
| 876 |
|
---|
| 877 | MRB_API void
|
---|
| 878 | mrb_define_const(mrb_state *mrb, struct RClass *mod, const char *name, mrb_value v)
|
---|
| 879 | {
|
---|
| 880 | mrb_obj_iv_set(mrb, (struct RObject*)mod, mrb_intern_cstr(mrb, name), v);
|
---|
| 881 | }
|
---|
| 882 |
|
---|
| 883 | MRB_API void
|
---|
| 884 | mrb_define_global_const(mrb_state *mrb, const char *name, mrb_value val)
|
---|
| 885 | {
|
---|
| 886 | mrb_define_const(mrb, mrb->object_class, name, val);
|
---|
| 887 | }
|
---|
| 888 |
|
---|
| 889 | static int
|
---|
| 890 | const_i(mrb_state *mrb, mrb_sym sym, mrb_value v, void *p)
|
---|
| 891 | {
|
---|
| 892 | mrb_value ary;
|
---|
| 893 | const char* s;
|
---|
| 894 | mrb_int len;
|
---|
| 895 |
|
---|
| 896 | ary = *(mrb_value*)p;
|
---|
[439] | 897 | s = mrb_sym_name_len(mrb, sym, &len);
|
---|
[270] | 898 | if (len >= 1 && ISUPPER(s[0])) {
|
---|
[439] | 899 | mrb_int i, alen = RARRAY_LEN(ary);
|
---|
| 900 |
|
---|
| 901 | for (i=0; i<alen; i++) {
|
---|
| 902 | if (mrb_symbol(RARRAY_PTR(ary)[i]) == sym)
|
---|
| 903 | break;
|
---|
| 904 | }
|
---|
| 905 | if (i==alen) {
|
---|
| 906 | mrb_ary_push(mrb, ary, mrb_symbol_value(sym));
|
---|
| 907 | }
|
---|
[270] | 908 | }
|
---|
| 909 | return 0;
|
---|
| 910 | }
|
---|
| 911 |
|
---|
| 912 | /* 15.2.2.4.24 */
|
---|
| 913 | /*
|
---|
| 914 | * call-seq:
|
---|
| 915 | * mod.constants -> array
|
---|
| 916 | *
|
---|
| 917 | * Returns an array of all names of contants defined in the receiver.
|
---|
| 918 | */
|
---|
| 919 | mrb_value
|
---|
| 920 | mrb_mod_constants(mrb_state *mrb, mrb_value mod)
|
---|
| 921 | {
|
---|
| 922 | mrb_value ary;
|
---|
| 923 | mrb_bool inherit = TRUE;
|
---|
| 924 | struct RClass *c = mrb_class_ptr(mod);
|
---|
| 925 |
|
---|
| 926 | mrb_get_args(mrb, "|b", &inherit);
|
---|
| 927 | ary = mrb_ary_new(mrb);
|
---|
| 928 | while (c) {
|
---|
[439] | 929 | iv_foreach(mrb, c->iv, const_i, &ary);
|
---|
[270] | 930 | if (!inherit) break;
|
---|
| 931 | c = c->super;
|
---|
| 932 | if (c == mrb->object_class) break;
|
---|
| 933 | }
|
---|
| 934 | return ary;
|
---|
| 935 | }
|
---|
| 936 |
|
---|
| 937 | MRB_API mrb_value
|
---|
| 938 | mrb_gv_get(mrb_state *mrb, mrb_sym sym)
|
---|
| 939 | {
|
---|
| 940 | mrb_value v;
|
---|
| 941 |
|
---|
| 942 | if (iv_get(mrb, mrb->globals, sym, &v))
|
---|
| 943 | return v;
|
---|
| 944 | return mrb_nil_value();
|
---|
| 945 | }
|
---|
| 946 |
|
---|
| 947 | MRB_API void
|
---|
| 948 | mrb_gv_set(mrb_state *mrb, mrb_sym sym, mrb_value v)
|
---|
| 949 | {
|
---|
| 950 | iv_tbl *t;
|
---|
| 951 |
|
---|
| 952 | if (!mrb->globals) {
|
---|
[439] | 953 | mrb->globals = iv_new(mrb);
|
---|
[270] | 954 | }
|
---|
[439] | 955 | t = mrb->globals;
|
---|
[270] | 956 | iv_put(mrb, t, sym, v);
|
---|
| 957 | }
|
---|
| 958 |
|
---|
| 959 | MRB_API void
|
---|
| 960 | mrb_gv_remove(mrb_state *mrb, mrb_sym sym)
|
---|
| 961 | {
|
---|
| 962 | iv_del(mrb, mrb->globals, sym, NULL);
|
---|
| 963 | }
|
---|
| 964 |
|
---|
| 965 | static int
|
---|
| 966 | gv_i(mrb_state *mrb, mrb_sym sym, mrb_value v, void *p)
|
---|
| 967 | {
|
---|
| 968 | mrb_value ary;
|
---|
| 969 |
|
---|
| 970 | ary = *(mrb_value*)p;
|
---|
| 971 | mrb_ary_push(mrb, ary, mrb_symbol_value(sym));
|
---|
| 972 | return 0;
|
---|
| 973 | }
|
---|
| 974 |
|
---|
| 975 | /* 15.3.1.2.4 */
|
---|
| 976 | /* 15.3.1.3.14 */
|
---|
| 977 | /*
|
---|
| 978 | * call-seq:
|
---|
| 979 | * global_variables -> array
|
---|
| 980 | *
|
---|
| 981 | * Returns an array of the names of global variables.
|
---|
| 982 | *
|
---|
| 983 | * global_variables.grep /std/ #=> [:$stdin, :$stdout, :$stderr]
|
---|
| 984 | */
|
---|
| 985 | mrb_value
|
---|
| 986 | mrb_f_global_variables(mrb_state *mrb, mrb_value self)
|
---|
| 987 | {
|
---|
| 988 | iv_tbl *t = mrb->globals;
|
---|
| 989 | mrb_value ary = mrb_ary_new(mrb);
|
---|
| 990 |
|
---|
[439] | 991 | iv_foreach(mrb, t, gv_i, &ary);
|
---|
[270] | 992 | return ary;
|
---|
| 993 | }
|
---|
| 994 |
|
---|
| 995 | static mrb_bool
|
---|
| 996 | mrb_const_defined_0(mrb_state *mrb, mrb_value mod, mrb_sym id, mrb_bool exclude, mrb_bool recurse)
|
---|
| 997 | {
|
---|
| 998 | struct RClass *klass = mrb_class_ptr(mod);
|
---|
| 999 | struct RClass *tmp;
|
---|
[439] | 1000 | mrb_bool mod_retry = FALSE;
|
---|
[270] | 1001 |
|
---|
| 1002 | tmp = klass;
|
---|
| 1003 | retry:
|
---|
| 1004 | while (tmp) {
|
---|
[439] | 1005 | if (iv_get(mrb, tmp->iv, id, NULL)) {
|
---|
[270] | 1006 | return TRUE;
|
---|
| 1007 | }
|
---|
| 1008 | if (!recurse && (klass != mrb->object_class)) break;
|
---|
| 1009 | tmp = tmp->super;
|
---|
| 1010 | }
|
---|
| 1011 | if (!exclude && !mod_retry && (klass->tt == MRB_TT_MODULE)) {
|
---|
[439] | 1012 | mod_retry = TRUE;
|
---|
[270] | 1013 | tmp = mrb->object_class;
|
---|
| 1014 | goto retry;
|
---|
| 1015 | }
|
---|
| 1016 | return FALSE;
|
---|
| 1017 | }
|
---|
| 1018 |
|
---|
| 1019 | MRB_API mrb_bool
|
---|
| 1020 | mrb_const_defined(mrb_state *mrb, mrb_value mod, mrb_sym id)
|
---|
| 1021 | {
|
---|
| 1022 | return mrb_const_defined_0(mrb, mod, id, TRUE, TRUE);
|
---|
| 1023 | }
|
---|
| 1024 |
|
---|
| 1025 | MRB_API mrb_bool
|
---|
| 1026 | mrb_const_defined_at(mrb_state *mrb, mrb_value mod, mrb_sym id)
|
---|
| 1027 | {
|
---|
| 1028 | return mrb_const_defined_0(mrb, mod, id, TRUE, FALSE);
|
---|
| 1029 | }
|
---|
| 1030 |
|
---|
| 1031 | MRB_API mrb_value
|
---|
| 1032 | mrb_attr_get(mrb_state *mrb, mrb_value obj, mrb_sym id)
|
---|
| 1033 | {
|
---|
| 1034 | return mrb_iv_get(mrb, obj, id);
|
---|
| 1035 | }
|
---|
| 1036 |
|
---|
| 1037 | struct csym_arg {
|
---|
| 1038 | struct RClass *c;
|
---|
| 1039 | mrb_sym sym;
|
---|
| 1040 | };
|
---|
| 1041 |
|
---|
| 1042 | static int
|
---|
| 1043 | csym_i(mrb_state *mrb, mrb_sym sym, mrb_value v, void *p)
|
---|
| 1044 | {
|
---|
| 1045 | struct csym_arg *a = (struct csym_arg*)p;
|
---|
| 1046 | struct RClass *c = a->c;
|
---|
| 1047 |
|
---|
| 1048 | if (mrb_type(v) == c->tt && mrb_class_ptr(v) == c) {
|
---|
| 1049 | a->sym = sym;
|
---|
| 1050 | return 1; /* stop iteration */
|
---|
| 1051 | }
|
---|
| 1052 | return 0;
|
---|
| 1053 | }
|
---|
| 1054 |
|
---|
[439] | 1055 | static mrb_sym
|
---|
| 1056 | find_class_sym(mrb_state *mrb, struct RClass *outer, struct RClass *c)
|
---|
[270] | 1057 | {
|
---|
[439] | 1058 | struct csym_arg arg;
|
---|
[270] | 1059 |
|
---|
[439] | 1060 | if (!outer) return 0;
|
---|
| 1061 | if (outer == c) return 0;
|
---|
| 1062 | arg.c = c;
|
---|
| 1063 | arg.sym = 0;
|
---|
| 1064 | iv_foreach(mrb, outer->iv, csym_i, &arg);
|
---|
| 1065 | return arg.sym;
|
---|
| 1066 | }
|
---|
[270] | 1067 |
|
---|
[439] | 1068 | static struct RClass*
|
---|
| 1069 | outer_class(mrb_state *mrb, struct RClass *c)
|
---|
| 1070 | {
|
---|
| 1071 | mrb_value ov;
|
---|
[270] | 1072 |
|
---|
[439] | 1073 | ov = mrb_obj_iv_get(mrb, (struct RObject*)c, mrb_intern_lit(mrb, "__outer__"));
|
---|
| 1074 | if (mrb_nil_p(ov)) return NULL;
|
---|
| 1075 | switch (mrb_type(ov)) {
|
---|
| 1076 | case MRB_TT_CLASS:
|
---|
| 1077 | case MRB_TT_MODULE:
|
---|
| 1078 | return mrb_class_ptr(ov);
|
---|
| 1079 | default:
|
---|
| 1080 | break;
|
---|
[270] | 1081 | }
|
---|
[439] | 1082 | return NULL;
|
---|
[270] | 1083 | }
|
---|
[439] | 1084 |
|
---|
| 1085 | static mrb_bool
|
---|
| 1086 | detect_outer_loop(mrb_state *mrb, struct RClass *c)
|
---|
| 1087 | {
|
---|
| 1088 | struct RClass *t = c; /* tortoise */
|
---|
| 1089 | struct RClass *h = c; /* hare */
|
---|
| 1090 |
|
---|
| 1091 | for (;;) {
|
---|
| 1092 | if (h == NULL) return FALSE;
|
---|
| 1093 | h = outer_class(mrb, h);
|
---|
| 1094 | if (h == NULL) return FALSE;
|
---|
| 1095 | h = outer_class(mrb, h);
|
---|
| 1096 | t = outer_class(mrb, t);
|
---|
| 1097 | if (t == h) return TRUE;
|
---|
| 1098 | }
|
---|
| 1099 | }
|
---|
| 1100 |
|
---|
| 1101 | mrb_value
|
---|
| 1102 | mrb_class_find_path(mrb_state *mrb, struct RClass *c)
|
---|
| 1103 | {
|
---|
| 1104 | struct RClass *outer;
|
---|
| 1105 | mrb_value path;
|
---|
| 1106 | mrb_sym name;
|
---|
| 1107 | const char *str;
|
---|
| 1108 | mrb_int len;
|
---|
| 1109 |
|
---|
| 1110 | if (detect_outer_loop(mrb, c)) return mrb_nil_value();
|
---|
| 1111 | outer = outer_class(mrb, c);
|
---|
| 1112 | if (outer == NULL) return mrb_nil_value();
|
---|
| 1113 | name = find_class_sym(mrb, outer, c);
|
---|
| 1114 | if (name == 0) return mrb_nil_value();
|
---|
| 1115 | str = mrb_class_name(mrb, outer);
|
---|
| 1116 | path = mrb_str_new_capa(mrb, 40);
|
---|
| 1117 | mrb_str_cat_cstr(mrb, path, str);
|
---|
| 1118 | mrb_str_cat_cstr(mrb, path, "::");
|
---|
| 1119 |
|
---|
| 1120 | str = mrb_sym_name_len(mrb, name, &len);
|
---|
| 1121 | mrb_str_cat(mrb, path, str, len);
|
---|
| 1122 | if (RSTRING_PTR(path)[0] != '#') {
|
---|
| 1123 | iv_del(mrb, c->iv, mrb_intern_lit(mrb, "__outer__"), NULL);
|
---|
| 1124 | iv_put(mrb, c->iv, mrb_intern_lit(mrb, "__classname__"), path);
|
---|
| 1125 | mrb_field_write_barrier_value(mrb, (struct RBasic*)c, path);
|
---|
| 1126 | path = mrb_str_dup(mrb, path);
|
---|
| 1127 | }
|
---|
| 1128 | return path;
|
---|
| 1129 | }
|
---|
| 1130 |
|
---|
| 1131 | #define identchar(c) (ISALNUM(c) || (c) == '_' || !ISASCII(c))
|
---|
| 1132 |
|
---|
| 1133 | mrb_bool
|
---|
| 1134 | mrb_ident_p(const char *s, mrb_int len)
|
---|
| 1135 | {
|
---|
| 1136 | mrb_int i;
|
---|
| 1137 |
|
---|
| 1138 | for (i = 0; i < len; i++) {
|
---|
| 1139 | if (!identchar(s[i])) return FALSE;
|
---|
| 1140 | }
|
---|
| 1141 | return TRUE;
|
---|
| 1142 | }
|
---|