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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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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12 | #include <mruby/variable.h>
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13 |
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14 | #ifndef MRB_IV_SEGMENT_SIZE
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15 | #define MRB_IV_SEGMENT_SIZE 4
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16 | #endif
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17 |
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18 | typedef struct segment {
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19 | mrb_sym key[MRB_IV_SEGMENT_SIZE];
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20 | mrb_value val[MRB_IV_SEGMENT_SIZE];
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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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31 | /* Creates the instance variable table. */
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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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37 | t = (iv_tbl*)mrb_malloc(mrb, sizeof(iv_tbl));
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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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45 | /* Set the value for the symbol in the instance variable table. */
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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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49 | segment *seg;
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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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55 | if (t == NULL) return;
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56 | seg = t->rootseg;
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57 | while (seg) {
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58 | for (i=0; i<MRB_IV_SEGMENT_SIZE; i++) {
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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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85 | t->size++;
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86 | return;
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87 | }
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88 |
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89 | seg = (segment*)mrb_malloc(mrb, sizeof(segment));
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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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94 | t->size++;
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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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103 | /* Get a value for a symbol from the instance variable table. */
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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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110 | if (t == NULL) return FALSE;
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111 | seg = t->rootseg;
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112 | while (seg) {
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113 | for (i=0; i<MRB_IV_SEGMENT_SIZE; i++) {
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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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129 | /* Deletes the value for the symbol from the instance variable table. */
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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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136 | if (t == NULL) return FALSE;
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137 | seg = t->rootseg;
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138 | while (seg) {
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139 | for (i=0; i<MRB_IV_SEGMENT_SIZE; i++) {
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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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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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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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164 | if (t == NULL) return;
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165 | seg = t->rootseg;
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166 | while (seg) {
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167 | for (i=0; i<MRB_IV_SEGMENT_SIZE; i++) {
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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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172 | return;
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173 | }
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174 | if (key != 0) {
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175 | if ((*func)(mrb, key, seg->val[i], p) != 0) {
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176 | return;
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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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182 | return;
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183 | }
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184 |
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185 | /* Get the size of the instance variable table. */
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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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192 | if (t == NULL) return 0;
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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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201 | size += MRB_IV_SEGMENT_SIZE;
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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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207 | /* Copy the instance variable table. */
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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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220 | for (i=0; i<MRB_IV_SEGMENT_SIZE; i++) {
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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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234 | /* Free memory of the instance variable table. */
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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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259 | iv_foreach(mrb, t, iv_mark_i, 0);
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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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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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346 | {
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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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350 | }
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351 | iv_put(mrb, obj->iv, sym, v);
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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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356 | mrb_obj_iv_set(mrb_state *mrb, struct RObject *obj, mrb_sym sym, mrb_value v)
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357 | {
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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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361 |
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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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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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433 | mrb_iv_name_sym_p(mrb_state *mrb, mrb_sym iv_name)
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434 | {
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435 | const char *s;
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436 | mrb_int len;
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437 |
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438 | s = mrb_sym_name_len(mrb, iv_name, &len);
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439 | if (len < 2) return FALSE;
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440 | if (s[0] != '@') return FALSE;
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441 | if (ISDIGIT(s[1])) return FALSE;
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442 | return mrb_ident_p(s+1, len-1);
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443 | }
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444 |
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445 | MRB_API void
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446 | mrb_iv_name_sym_check(mrb_state *mrb, mrb_sym iv_name)
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447 | {
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448 | if (!mrb_iv_name_sym_p(mrb, iv_name)) {
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449 | mrb_name_error(mrb, iv_name, "'%n' is not allowed as an instance variable name", iv_name);
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450 | }
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451 | }
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452 |
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453 | MRB_API void
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454 | mrb_iv_copy(mrb_state *mrb, mrb_value dest, mrb_value src)
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455 | {
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456 | struct RObject *d = mrb_obj_ptr(dest);
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457 | struct RObject *s = mrb_obj_ptr(src);
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458 |
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459 | if (d->iv) {
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460 | iv_free(mrb, d->iv);
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461 | d->iv = 0;
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462 | }
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463 | if (s->iv) {
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464 | mrb_write_barrier(mrb, (struct RBasic*)d);
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465 | d->iv = iv_copy(mrb, s->iv);
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466 | }
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467 | }
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468 |
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469 | static int
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470 | inspect_i(mrb_state *mrb, mrb_sym sym, mrb_value v, void *p)
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471 | {
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472 | mrb_value str = *(mrb_value*)p;
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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 | }
|
---|
486 | s = mrb_sym_name_len(mrb, sym, &len);
|
---|
487 | mrb_str_cat(mrb, str, s, len);
|
---|
488 | mrb_str_cat_lit(mrb, str, "=");
|
---|
489 | if (mrb_object_p(v)) {
|
---|
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));
|
---|
507 | mrb_value str = mrb_str_new_capa(mrb, 30);
|
---|
508 |
|
---|
509 | mrb_str_cat_lit(mrb, str, "-<");
|
---|
510 | mrb_str_cat_cstr(mrb, str, cn);
|
---|
511 | mrb_str_cat_lit(mrb, str, ":");
|
---|
512 | mrb_str_cat_str(mrb, str, mrb_ptr_to_str(mrb, obj));
|
---|
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 |
|
---|
528 | mrb_check_frozen(mrb, mrb_obj_ptr(obj));
|
---|
529 | if (iv_del(mrb, t, sym, &val)) {
|
---|
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;
|
---|
544 | s = mrb_sym_name_len(mrb, sym, &len);
|
---|
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);
|
---|
574 | if (obj_iv_p(self)) {
|
---|
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;
|
---|
588 | s = mrb_sym_name_len(mrb, sym, &len);
|
---|
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:
|
---|
598 | * mod.class_variables(inherit=true) -> array
|
---|
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;
|
---|
616 | mrb_bool inherit = TRUE;
|
---|
617 |
|
---|
618 | mrb_get_args(mrb, "|b", &inherit);
|
---|
619 | ary = mrb_ary_new(mrb);
|
---|
620 | c = mrb_class_ptr(mod);
|
---|
621 | while (c) {
|
---|
622 | iv_foreach(mrb, c->iv, cv_i, &ary);
|
---|
623 | if (!inherit) break;
|
---|
624 | c = c->super;
|
---|
625 | }
|
---|
626 | return ary;
|
---|
627 | }
|
---|
628 |
|
---|
629 | mrb_value
|
---|
630 | mrb_mod_cv_get(mrb_state *mrb, struct RClass *c, mrb_sym sym)
|
---|
631 | {
|
---|
632 | struct RClass * cls = c;
|
---|
633 | mrb_value v;
|
---|
634 | int given = FALSE;
|
---|
635 |
|
---|
636 | while (c) {
|
---|
637 | if (c->iv && iv_get(mrb, c->iv, sym, &v)) {
|
---|
638 | given = TRUE;
|
---|
639 | }
|
---|
640 | c = c->super;
|
---|
641 | }
|
---|
642 | if (given) return v;
|
---|
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);
|
---|
649 | if (c->tt == MRB_TT_CLASS || c->tt == MRB_TT_MODULE) {
|
---|
650 | given = FALSE;
|
---|
651 | while (c) {
|
---|
652 | if (c->iv && iv_get(mrb, c->iv, sym, &v)) {
|
---|
653 | given = TRUE;
|
---|
654 | }
|
---|
655 | c = c->super;
|
---|
656 | }
|
---|
657 | if (given) return v;
|
---|
658 | }
|
---|
659 | }
|
---|
660 | mrb_name_error(mrb, sym, "uninitialized class variable %n in %C", sym, cls);
|
---|
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) {
|
---|
677 | iv_tbl *t = c->iv;
|
---|
678 |
|
---|
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;
|
---|
684 | }
|
---|
685 | c = c->super;
|
---|
686 | }
|
---|
687 |
|
---|
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 | }
|
---|
703 | }
|
---|
704 | else{
|
---|
705 | c = cls;
|
---|
706 | }
|
---|
707 |
|
---|
708 | mrb_check_frozen(mrb, c);
|
---|
709 | if (!c->iv) {
|
---|
710 | c->iv = iv_new(mrb);
|
---|
711 | }
|
---|
712 |
|
---|
713 | iv_put(mrb, c->iv, sym, v);
|
---|
714 | mrb_write_barrier(mrb, (struct RBasic*)c);
|
---|
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 |
|
---|
723 | mrb_bool
|
---|
724 | mrb_mod_cv_defined(mrb_state *mrb, struct RClass * c, mrb_sym sym)
|
---|
725 | {
|
---|
726 | while (c) {
|
---|
727 | iv_tbl *t = c->iv;
|
---|
728 | if (iv_get(mrb, t, sym, NULL)) return TRUE;
|
---|
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 | {
|
---|
744 | struct RClass *c;
|
---|
745 |
|
---|
746 | struct RProc *p = mrb->c->ci->proc;
|
---|
747 |
|
---|
748 | for (;;) {
|
---|
749 | c = MRB_PROC_TARGET_CLASS(p);
|
---|
750 | if (c->tt != MRB_TT_SCLASS) break;
|
---|
751 | p = p->upper;
|
---|
752 | }
|
---|
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 | {
|
---|
759 | struct RClass *c;
|
---|
760 | struct RProc *p = mrb->c->ci->proc;
|
---|
761 |
|
---|
762 | for (;;) {
|
---|
763 | c = MRB_PROC_TARGET_CLASS(p);
|
---|
764 | if (c->tt != MRB_TT_SCLASS) break;
|
---|
765 | p = p->upper;
|
---|
766 | }
|
---|
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) {
|
---|
795 | if (iv_get(mrb, c->iv, sym, &v))
|
---|
796 | return v;
|
---|
797 | }
|
---|
798 | c = c->super;
|
---|
799 | }
|
---|
800 | if (!retry && base->tt == MRB_TT_MODULE) {
|
---|
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 | {
|
---|
819 | struct RClass *c;
|
---|
820 | struct RClass *c2;
|
---|
821 | mrb_value v;
|
---|
822 | struct RProc *proc;
|
---|
823 |
|
---|
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;
|
---|
831 |
|
---|
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)) {
|
---|
844 | return v;
|
---|
845 | }
|
---|
846 | proc = proc->upper;
|
---|
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);
|
---|
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 | }
|
---|
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 | {
|
---|
864 | struct RClass *c;
|
---|
865 |
|
---|
866 | c = MRB_PROC_TARGET_CLASS(mrb->c->ci->proc);
|
---|
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;
|
---|
897 | s = mrb_sym_name_len(mrb, sym, &len);
|
---|
898 | if (len >= 1 && ISUPPER(s[0])) {
|
---|
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 | }
|
---|
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) {
|
---|
929 | iv_foreach(mrb, c->iv, const_i, &ary);
|
---|
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) {
|
---|
953 | mrb->globals = iv_new(mrb);
|
---|
954 | }
|
---|
955 | t = mrb->globals;
|
---|
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 |
|
---|
991 | iv_foreach(mrb, t, gv_i, &ary);
|
---|
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;
|
---|
1000 | mrb_bool mod_retry = FALSE;
|
---|
1001 |
|
---|
1002 | tmp = klass;
|
---|
1003 | retry:
|
---|
1004 | while (tmp) {
|
---|
1005 | if (iv_get(mrb, tmp->iv, id, NULL)) {
|
---|
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)) {
|
---|
1012 | mod_retry = TRUE;
|
---|
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 |
|
---|
1055 | static mrb_sym
|
---|
1056 | find_class_sym(mrb_state *mrb, struct RClass *outer, struct RClass *c)
|
---|
1057 | {
|
---|
1058 | struct csym_arg arg;
|
---|
1059 |
|
---|
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 | }
|
---|
1067 |
|
---|
1068 | static struct RClass*
|
---|
1069 | outer_class(mrb_state *mrb, struct RClass *c)
|
---|
1070 | {
|
---|
1071 | mrb_value ov;
|
---|
1072 |
|
---|
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;
|
---|
1081 | }
|
---|
1082 | return NULL;
|
---|
1083 | }
|
---|
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 | }
|
---|