[270] | 1 | /*
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| 2 | ** state.c - mrb_state open/close functions
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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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| 7 | #include <stdlib.h>
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| 8 | #include <string.h>
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[331] | 9 | #include <mruby.h>
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| 10 | #include <mruby/irep.h>
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| 11 | #include <mruby/variable.h>
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| 12 | #include <mruby/debug.h>
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| 13 | #include <mruby/string.h>
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[270] | 14 |
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| 15 | void mrb_init_core(mrb_state*);
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| 16 | void mrb_init_mrbgems(mrb_state*);
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| 17 |
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| 18 | void mrb_gc_init(mrb_state*, mrb_gc *gc);
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| 19 | void mrb_gc_destroy(mrb_state*, mrb_gc *gc);
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| 20 |
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| 21 | static mrb_value
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| 22 | inspect_main(mrb_state *mrb, mrb_value mod)
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| 23 | {
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| 24 | return mrb_str_new_lit(mrb, "main");
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| 25 | }
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| 26 |
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| 27 | MRB_API mrb_state*
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| 28 | mrb_open_core(mrb_allocf f, void *ud)
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| 29 | {
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| 30 | static const mrb_state mrb_state_zero = { 0 };
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| 31 | static const struct mrb_context mrb_context_zero = { 0 };
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| 32 | mrb_state *mrb;
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| 33 |
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| 34 | mrb = (mrb_state *)(f)(NULL, NULL, sizeof(mrb_state), ud);
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| 35 | if (mrb == NULL) return NULL;
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| 36 |
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| 37 | *mrb = mrb_state_zero;
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| 38 | mrb->allocf_ud = ud;
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| 39 | mrb->allocf = f;
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| 40 | mrb->atexit_stack_len = 0;
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| 41 |
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| 42 | mrb_gc_init(mrb, &mrb->gc);
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| 43 | mrb->c = (struct mrb_context*)mrb_malloc(mrb, sizeof(struct mrb_context));
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| 44 | *mrb->c = mrb_context_zero;
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| 45 | mrb->root_c = mrb->c;
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| 46 |
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| 47 | mrb_init_core(mrb);
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| 48 |
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| 49 | return mrb;
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| 50 | }
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| 51 |
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| 52 | void*
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| 53 | mrb_default_allocf(mrb_state *mrb, void *p, size_t size, void *ud)
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| 54 | {
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| 55 | if (size == 0) {
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| 56 | free(p);
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| 57 | return NULL;
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| 58 | }
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| 59 | else {
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| 60 | return realloc(p, size);
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| 61 | }
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| 62 | }
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| 63 |
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| 64 | struct alloca_header {
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| 65 | struct alloca_header *next;
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| 66 | char buf[];
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| 67 | };
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| 68 |
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| 69 | MRB_API void*
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| 70 | mrb_alloca(mrb_state *mrb, size_t size)
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| 71 | {
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| 72 | struct alloca_header *p;
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| 73 |
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| 74 | p = (struct alloca_header*) mrb_malloc(mrb, sizeof(struct alloca_header)+size);
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| 75 | p->next = mrb->mems;
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| 76 | mrb->mems = p;
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| 77 | return (void*)p->buf;
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| 78 | }
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| 79 |
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| 80 | static void
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| 81 | mrb_alloca_free(mrb_state *mrb)
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| 82 | {
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| 83 | struct alloca_header *p;
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| 84 | struct alloca_header *tmp;
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| 85 |
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| 86 | if (mrb == NULL) return;
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| 87 | p = mrb->mems;
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| 88 |
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| 89 | while (p) {
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| 90 | tmp = p;
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| 91 | p = p->next;
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| 92 | mrb_free(mrb, tmp);
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| 93 | }
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| 94 | }
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| 95 |
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| 96 | MRB_API mrb_state*
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| 97 | mrb_open(void)
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| 98 | {
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[279] | 99 | mrb_state *mrb = mrb_open_allocf(mrb_default_allocf, NULL, FALSE);
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[270] | 100 |
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| 101 | return mrb;
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| 102 | }
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| 103 |
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| 104 | MRB_API mrb_state*
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[279] | 105 | mrb_open_allocf(mrb_allocf f, void *ud, mrb_bool disable_gems)
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[270] | 106 | {
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| 107 | mrb_state *mrb = mrb_open_core(f, ud);
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| 108 |
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| 109 | if (mrb == NULL) {
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| 110 | return NULL;
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| 111 | }
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| 112 |
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[279] | 113 | if (!disable_gems) {
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| 114 | mrb_init_mrbgems(mrb);
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| 115 | mrb_gc_arena_restore(mrb, 0);
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| 116 | }
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[270] | 117 | return mrb;
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| 118 | }
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| 119 |
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| 120 | void mrb_free_symtbl(mrb_state *mrb);
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| 121 |
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| 122 | void
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| 123 | mrb_irep_incref(mrb_state *mrb, mrb_irep *irep)
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| 124 | {
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| 125 | irep->refcnt++;
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| 126 | }
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| 127 |
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| 128 | void
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| 129 | mrb_irep_decref(mrb_state *mrb, mrb_irep *irep)
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| 130 | {
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| 131 | irep->refcnt--;
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| 132 | if (irep->refcnt == 0) {
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| 133 | mrb_irep_free(mrb, irep);
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| 134 | }
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| 135 | }
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| 136 |
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| 137 | void
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| 138 | mrb_irep_free(mrb_state *mrb, mrb_irep *irep)
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| 139 | {
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| 140 | size_t i;
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| 141 |
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| 142 | if (!(irep->flags & MRB_ISEQ_NO_FREE))
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| 143 | mrb_free(mrb, irep->iseq);
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[331] | 144 | if (irep->pool) for (i=0; i<irep->plen; i++) {
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[270] | 145 | if (mrb_type(irep->pool[i]) == MRB_TT_STRING) {
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| 146 | mrb_gc_free_str(mrb, RSTRING(irep->pool[i]));
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| 147 | mrb_free(mrb, mrb_obj_ptr(irep->pool[i]));
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| 148 | }
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| 149 | #ifdef MRB_WORD_BOXING
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| 150 | else if (mrb_type(irep->pool[i]) == MRB_TT_FLOAT) {
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| 151 | mrb_free(mrb, mrb_obj_ptr(irep->pool[i]));
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| 152 | }
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| 153 | #endif
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| 154 | }
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| 155 | mrb_free(mrb, irep->pool);
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| 156 | mrb_free(mrb, irep->syms);
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| 157 | for (i=0; i<irep->rlen; i++) {
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| 158 | mrb_irep_decref(mrb, irep->reps[i]);
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| 159 | }
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| 160 | mrb_free(mrb, irep->reps);
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| 161 | mrb_free(mrb, irep->lv);
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[331] | 162 | if (irep->own_filename) {
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| 163 | mrb_free(mrb, (void *)irep->filename);
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| 164 | }
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[270] | 165 | mrb_free(mrb, irep->lines);
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| 166 | mrb_debug_info_free(mrb, irep->debug_info);
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| 167 | mrb_free(mrb, irep);
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| 168 | }
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| 169 |
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| 170 | mrb_value
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| 171 | mrb_str_pool(mrb_state *mrb, mrb_value str)
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| 172 | {
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| 173 | struct RString *s = mrb_str_ptr(str);
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| 174 | struct RString *ns;
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| 175 | char *ptr;
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| 176 | mrb_int len;
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| 177 |
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| 178 | ns = (struct RString *)mrb_malloc(mrb, sizeof(struct RString));
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| 179 | ns->tt = MRB_TT_STRING;
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| 180 | ns->c = mrb->string_class;
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| 181 |
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| 182 | if (RSTR_NOFREE_P(s)) {
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| 183 | ns->flags = MRB_STR_NOFREE;
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| 184 | ns->as.heap.ptr = s->as.heap.ptr;
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| 185 | ns->as.heap.len = s->as.heap.len;
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| 186 | ns->as.heap.aux.capa = 0;
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| 187 | }
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| 188 | else {
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| 189 | ns->flags = 0;
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| 190 | if (RSTR_EMBED_P(s)) {
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| 191 | ptr = s->as.ary;
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| 192 | len = RSTR_EMBED_LEN(s);
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| 193 | }
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| 194 | else {
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| 195 | ptr = s->as.heap.ptr;
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| 196 | len = s->as.heap.len;
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| 197 | }
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| 198 |
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| 199 | if (len < RSTRING_EMBED_LEN_MAX) {
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| 200 | RSTR_SET_EMBED_FLAG(ns);
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| 201 | RSTR_SET_EMBED_LEN(ns, len);
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| 202 | if (ptr) {
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| 203 | memcpy(ns->as.ary, ptr, len);
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| 204 | }
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| 205 | ns->as.ary[len] = '\0';
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| 206 | }
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| 207 | else {
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| 208 | ns->as.heap.ptr = (char *)mrb_malloc(mrb, (size_t)len+1);
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| 209 | ns->as.heap.len = len;
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| 210 | ns->as.heap.aux.capa = len;
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| 211 | if (ptr) {
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| 212 | memcpy(ns->as.heap.ptr, ptr, len);
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| 213 | }
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| 214 | ns->as.heap.ptr[len] = '\0';
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| 215 | }
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| 216 | }
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| 217 | return mrb_obj_value(ns);
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| 218 | }
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| 219 |
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[331] | 220 | void mrb_free_backtrace(mrb_state *mrb);
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| 221 |
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[270] | 222 | MRB_API void
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| 223 | mrb_free_context(mrb_state *mrb, struct mrb_context *c)
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| 224 | {
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| 225 | if (!c) return;
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| 226 | mrb_free(mrb, c->stbase);
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| 227 | mrb_free(mrb, c->cibase);
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| 228 | mrb_free(mrb, c->rescue);
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| 229 | mrb_free(mrb, c->ensure);
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| 230 | mrb_free(mrb, c);
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| 231 | }
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| 232 |
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| 233 | MRB_API void
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| 234 | mrb_close(mrb_state *mrb)
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| 235 | {
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| 236 | if (!mrb) return;
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| 237 | if (mrb->atexit_stack_len > 0) {
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| 238 | mrb_int i;
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| 239 | for (i = mrb->atexit_stack_len; i > 0; --i) {
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| 240 | mrb->atexit_stack[i - 1](mrb);
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| 241 | }
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| 242 | #ifndef MRB_FIXED_STATE_ATEXIT_STACK
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| 243 | mrb_free(mrb, mrb->atexit_stack);
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| 244 | #endif
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| 245 | }
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| 246 |
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| 247 | /* free */
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| 248 | mrb_gc_free_gv(mrb);
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| 249 | mrb_free_context(mrb, mrb->root_c);
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| 250 | mrb_free_symtbl(mrb);
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| 251 | mrb_alloca_free(mrb);
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| 252 | mrb_gc_destroy(mrb, &mrb->gc);
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| 253 | mrb_free(mrb, mrb);
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| 254 | }
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| 255 |
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| 256 | MRB_API mrb_irep*
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| 257 | mrb_add_irep(mrb_state *mrb)
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| 258 | {
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| 259 | static const mrb_irep mrb_irep_zero = { 0 };
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| 260 | mrb_irep *irep;
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| 261 |
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| 262 | irep = (mrb_irep *)mrb_malloc(mrb, sizeof(mrb_irep));
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| 263 | *irep = mrb_irep_zero;
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| 264 | irep->refcnt = 1;
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[331] | 265 | irep->own_filename = FALSE;
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[270] | 266 |
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| 267 | return irep;
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| 268 | }
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| 269 |
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| 270 | MRB_API mrb_value
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| 271 | mrb_top_self(mrb_state *mrb)
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| 272 | {
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| 273 | if (!mrb->top_self) {
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| 274 | mrb->top_self = (struct RObject*)mrb_obj_alloc(mrb, MRB_TT_OBJECT, mrb->object_class);
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| 275 | mrb_define_singleton_method(mrb, mrb->top_self, "inspect", inspect_main, MRB_ARGS_NONE());
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| 276 | mrb_define_singleton_method(mrb, mrb->top_self, "to_s", inspect_main, MRB_ARGS_NONE());
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| 277 | }
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| 278 | return mrb_obj_value(mrb->top_self);
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| 279 | }
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| 280 |
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| 281 | MRB_API void
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| 282 | mrb_state_atexit(mrb_state *mrb, mrb_atexit_func f)
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| 283 | {
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| 284 | #ifdef MRB_FIXED_STATE_ATEXIT_STACK
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| 285 | if (mrb->atexit_stack_len + 1 > MRB_FIXED_STATE_ATEXIT_STACK_SIZE) {
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| 286 | mrb_raise(mrb, E_RUNTIME_ERROR, "exceeded fixed state atexit stack limit");
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| 287 | }
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| 288 | #else
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| 289 | size_t stack_size;
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| 290 |
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| 291 | stack_size = sizeof(mrb_atexit_func) * (mrb->atexit_stack_len + 1);
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| 292 | if (mrb->atexit_stack_len == 0) {
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| 293 | mrb->atexit_stack = (mrb_atexit_func*)mrb_malloc(mrb, stack_size);
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[331] | 294 | }
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| 295 | else {
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[270] | 296 | mrb->atexit_stack = (mrb_atexit_func*)mrb_realloc(mrb, mrb->atexit_stack, stack_size);
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| 297 | }
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| 298 | #endif
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| 299 |
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| 300 | mrb->atexit_stack[mrb->atexit_stack_len++] = f;
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| 301 | }
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