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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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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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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99 | mrb_state *mrb = mrb_open_allocf(mrb_default_allocf, NULL, FALSE);
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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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105 | mrb_open_allocf(mrb_allocf f, void *ud, mrb_bool disable_gems)
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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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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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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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144 | if (irep->pool) for (i=0; i<irep->plen; i++) {
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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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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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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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220 | void mrb_free_backtrace(mrb_state *mrb);
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221 |
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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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265 | irep->own_filename = FALSE;
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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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294 | }
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295 | else {
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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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