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 |
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13 | typedef int (iv_foreach_func)(mrb_state*,mrb_sym,mrb_value,void*);
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14 |
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15 | #ifdef MRB_USE_IV_SEGLIST
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16 |
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17 | #ifndef MRB_SEGMENT_SIZE
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18 | #define MRB_SEGMENT_SIZE 4
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19 | #endif
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20 |
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21 | typedef struct segment {
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22 | mrb_sym key[MRB_SEGMENT_SIZE];
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23 | mrb_value val[MRB_SEGMENT_SIZE];
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24 | struct segment *next;
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25 | } segment;
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26 |
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27 | /* Instance variable table structure */
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28 | typedef struct iv_tbl {
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29 | segment *rootseg;
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30 | size_t size;
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31 | size_t last_len;
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32 | } iv_tbl;
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33 |
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34 | /*
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35 | * Creates the instance variable table.
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36 | *
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37 | * Parameters
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38 | * mrb
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39 | * Returns
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40 | * the instance variable table.
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41 | */
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42 | static iv_tbl*
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43 | iv_new(mrb_state *mrb)
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44 | {
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45 | iv_tbl *t;
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46 |
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47 | t = mrb_malloc(mrb, sizeof(iv_tbl));
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48 | t->size = 0;
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49 | t->rootseg = NULL;
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50 | t->last_len = 0;
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51 |
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52 | return t;
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53 | }
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54 |
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55 | /*
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56 | * Set the value for the symbol in the instance variable table.
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57 | *
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58 | * Parameters
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59 | * mrb
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60 | * t the instance variable table to be set in.
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61 | * sym the symbol to be used as the key.
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62 | * val the value to be set.
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63 | */
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64 | static void
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65 | iv_put(mrb_state *mrb, iv_tbl *t, mrb_sym sym, mrb_value val)
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66 | {
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67 | segment *seg = t->rootseg;
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68 | segment *prev = NULL;
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69 | segment *matched_seg = NULL;
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70 | size_t matched_idx = 0;
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71 | size_t i;
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72 |
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73 | while (seg) {
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74 | for (i=0; i<MRB_SEGMENT_SIZE; i++) {
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75 | mrb_sym key = seg->key[i];
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76 | /* Found room in last segment after last_len */
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77 | if (!seg->next && i >= t->last_len) {
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78 | seg->key[i] = sym;
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79 | seg->val[i] = val;
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80 | t->last_len = i+1;
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81 | t->size++;
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82 | return;
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83 | }
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84 | if (!matched_seg && key == 0) {
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85 | matched_seg = seg;
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86 | matched_idx = i;
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87 | }
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88 | else if (key == sym) {
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89 | seg->val[i] = val;
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90 | return;
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91 | }
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92 | }
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93 | prev = seg;
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94 | seg = seg->next;
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95 | }
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96 |
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97 | /* Not found */
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98 | t->size++;
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99 | if (matched_seg) {
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100 | matched_seg->key[matched_idx] = sym;
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101 | matched_seg->val[matched_idx] = val;
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102 | return;
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103 | }
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104 |
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105 | seg = mrb_malloc(mrb, sizeof(segment));
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106 | if (!seg) return;
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107 | seg->next = NULL;
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108 | seg->key[0] = sym;
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109 | seg->val[0] = val;
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110 | t->last_len = 1;
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111 | if (prev) {
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112 | prev->next = seg;
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113 | }
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114 | else {
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115 | t->rootseg = seg;
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116 | }
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117 | }
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118 |
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119 | /*
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120 | * Get a value for a symbol from the instance variable table.
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121 | *
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122 | * Parameters
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123 | * mrb
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124 | * t the variable table to be searched.
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125 | * sym the symbol to be used as the key.
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126 | * vp the value pointer. Receives the value if the specified symbol is
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127 | * contained in the instance variable table.
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128 | * Returns
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129 | * true if the specified symbol is contained in the instance variable table.
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130 | */
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131 | static mrb_bool
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132 | iv_get(mrb_state *mrb, iv_tbl *t, mrb_sym sym, mrb_value *vp)
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133 | {
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134 | segment *seg;
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135 | size_t i;
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136 |
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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_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 | if (vp) *vp = seg->val[i];
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147 | return TRUE;
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148 | }
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149 | }
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150 | seg = seg->next;
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151 | }
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152 | return FALSE;
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153 | }
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154 |
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155 | /*
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156 | * Deletes the value for the symbol from the instance variable table.
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157 | *
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158 | * Parameters
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159 | * t the variable table to be searched.
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160 | * sym the symbol to be used as the key.
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161 | * vp the value pointer. Receive the deleted value if the symbol is
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162 | * contained in the instance variable table.
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163 | * Returns
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164 | * true if the specified symbol is contained in the instance variable table.
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165 | */
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166 | static mrb_bool
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167 | iv_del(mrb_state *mrb, iv_tbl *t, mrb_sym sym, mrb_value *vp)
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168 | {
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169 | segment *seg;
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170 | size_t i;
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171 |
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172 | seg = t->rootseg;
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173 | while (seg) {
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174 | for (i=0; i<MRB_SEGMENT_SIZE; i++) {
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175 | mrb_sym key = seg->key[i];
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176 |
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177 | if (!seg->next && i >= t->last_len) {
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178 | return FALSE;
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179 | }
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180 | if (key == sym) {
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181 | t->size--;
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182 | seg->key[i] = 0;
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183 | if (vp) *vp = seg->val[i];
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184 | return TRUE;
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185 | }
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186 | }
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187 | seg = seg->next;
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188 | }
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189 | return FALSE;
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190 | }
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191 |
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192 | static mrb_bool
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193 | iv_foreach(mrb_state *mrb, iv_tbl *t, iv_foreach_func *func, void *p)
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194 | {
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195 | segment *seg;
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196 | size_t i;
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197 | int n;
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198 |
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199 | seg = t->rootseg;
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200 | while (seg) {
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201 | for (i=0; i<MRB_SEGMENT_SIZE; i++) {
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202 | mrb_sym key = seg->key[i];
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203 |
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204 | /* no value in last segment after last_len */
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205 | if (!seg->next && i >= t->last_len) {
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206 | return FALSE;
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207 | }
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208 | if (key != 0) {
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209 | n =(*func)(mrb, key, seg->val[i], p);
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210 | if (n > 0) return FALSE;
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211 | if (n < 0) {
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212 | t->size--;
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213 | seg->key[i] = 0;
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214 | }
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215 | }
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216 | }
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217 | seg = seg->next;
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218 | }
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219 | return TRUE;
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220 | }
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221 |
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222 | static size_t
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223 | iv_size(mrb_state *mrb, iv_tbl *t)
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224 | {
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225 | segment *seg;
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226 | size_t size = 0;
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227 |
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228 | if (!t) return 0;
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229 | if (t->size > 0) return t->size;
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230 | seg = t->rootseg;
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231 | while (seg) {
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232 | if (seg->next == NULL) {
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233 | size += t->last_len;
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234 | return size;
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235 | }
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236 | seg = seg->next;
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237 | size += MRB_SEGMENT_SIZE;
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238 | }
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239 | /* empty iv_tbl */
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240 | return 0;
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241 | }
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242 |
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243 | static iv_tbl*
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244 | iv_copy(mrb_state *mrb, iv_tbl *t)
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245 | {
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246 | segment *seg;
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247 | iv_tbl *t2;
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248 |
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249 | size_t i;
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250 |
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251 | seg = t->rootseg;
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252 | t2 = iv_new(mrb);
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253 |
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254 | while (seg != NULL) {
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255 | for (i=0; i<MRB_SEGMENT_SIZE; i++) {
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256 | mrb_sym key = seg->key[i];
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257 | mrb_value val = seg->val[i];
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258 |
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259 | if ((seg->next == NULL) && (i >= t->last_len)) {
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260 | return t2;
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261 | }
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262 | iv_put(mrb, t2, key, val);
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263 | }
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264 | seg = seg->next;
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265 | }
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266 | return t2;
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267 | }
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268 |
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269 | static void
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270 | iv_free(mrb_state *mrb, iv_tbl *t)
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271 | {
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272 | segment *seg;
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273 |
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274 | seg = t->rootseg;
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275 | while (seg) {
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276 | segment *p = seg;
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277 | seg = seg->next;
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278 | mrb_free(mrb, p);
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279 | }
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280 | mrb_free(mrb, t);
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281 | }
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282 |
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283 | #else
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284 |
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285 | #include "mruby/khash.h"
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286 |
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287 | #ifndef MRB_IVHASH_INIT_SIZE
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288 | #define MRB_IVHASH_INIT_SIZE 8
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289 | #endif
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290 |
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291 | KHASH_DECLARE(iv, mrb_sym, mrb_value, TRUE)
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292 | KHASH_DEFINE(iv, mrb_sym, mrb_value, TRUE, kh_int_hash_func, kh_int_hash_equal)
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293 |
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294 | typedef struct iv_tbl {
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295 | khash_t(iv) h;
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296 | } iv_tbl;
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297 |
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298 | static iv_tbl*
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299 | iv_new(mrb_state *mrb)
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300 | {
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301 | return (iv_tbl*)kh_init_size(iv, mrb, MRB_IVHASH_INIT_SIZE);
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302 | }
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303 |
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304 | static void
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305 | iv_put(mrb_state *mrb, iv_tbl *t, mrb_sym sym, mrb_value val)
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306 | {
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307 | khash_t(iv) *h = &t->h;
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308 | khiter_t k;
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309 |
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310 | k = kh_put(iv, mrb, h, sym);
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311 | kh_value(h, k) = val;
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312 | }
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313 |
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314 | static mrb_bool
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315 | iv_get(mrb_state *mrb, iv_tbl *t, mrb_sym sym, mrb_value *vp)
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316 | {
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317 | khash_t(iv) *h = &t->h;
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318 | khiter_t k;
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319 |
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320 | k = kh_get(iv, mrb, h, sym);
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321 | if (k != kh_end(h)) {
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322 | if (vp) *vp = kh_value(h, k);
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323 | return TRUE;
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324 | }
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325 | return FALSE;
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326 | }
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327 |
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328 | static mrb_bool
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329 | iv_del(mrb_state *mrb, iv_tbl *t, mrb_sym sym, mrb_value *vp)
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330 | {
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331 | khash_t(iv) *h = &t->h;
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332 | khiter_t k;
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333 |
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334 | if (h) {
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335 | k = kh_get(iv, mrb, h, sym);
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336 | if (k != kh_end(h)) {
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337 | mrb_value val = kh_value(h, k);
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338 | kh_del(iv, mrb, h, k);
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339 | if (vp) *vp = val;
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340 | return TRUE;
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341 | }
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342 | }
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343 | return FALSE;
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344 | }
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345 |
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346 | static mrb_bool
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347 | iv_foreach(mrb_state *mrb, iv_tbl *t, iv_foreach_func *func, void *p)
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348 | {
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349 | khash_t(iv) *h = &t->h;
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350 | khiter_t k;
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351 | int n;
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352 |
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353 | if (h) {
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354 | for (k = kh_begin(h); k != kh_end(h); k++) {
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355 | if (kh_exist(h, k)) {
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356 | n = (*func)(mrb, kh_key(h, k), kh_value(h, k), p);
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357 | if (n > 0) return FALSE;
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358 | if (n < 0) {
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359 | kh_del(iv, mrb, h, k);
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360 | }
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361 | }
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362 | }
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363 | }
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364 | return TRUE;
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365 | }
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366 |
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367 | static size_t
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368 | iv_size(mrb_state *mrb, iv_tbl *t)
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369 | {
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370 | khash_t(iv) *h;
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371 |
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372 | if (t && (h = &t->h)) {
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373 | return kh_size(h);
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374 | }
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375 | return 0;
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376 | }
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377 |
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378 | static iv_tbl*
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379 | iv_copy(mrb_state *mrb, iv_tbl *t)
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380 | {
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381 | return (iv_tbl*)kh_copy(iv, mrb, &t->h);
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382 | }
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383 |
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384 | static void
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385 | iv_free(mrb_state *mrb, iv_tbl *t)
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386 | {
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387 | kh_destroy(iv, mrb, &t->h);
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388 | }
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389 |
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390 | #endif
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391 |
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392 | static int
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393 | iv_mark_i(mrb_state *mrb, mrb_sym sym, mrb_value v, void *p)
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394 | {
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395 | mrb_gc_mark_value(mrb, v);
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396 | return 0;
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397 | }
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398 |
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399 | static void
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400 | mark_tbl(mrb_state *mrb, iv_tbl *t)
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401 | {
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402 | if (t) {
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403 | iv_foreach(mrb, t, iv_mark_i, 0);
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404 | }
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405 | }
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406 |
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407 | void
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408 | mrb_gc_mark_gv(mrb_state *mrb)
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409 | {
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410 | mark_tbl(mrb, mrb->globals);
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411 | }
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412 |
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413 | void
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414 | mrb_gc_free_gv(mrb_state *mrb)
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415 | {
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416 | if (mrb->globals)
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417 | iv_free(mrb, mrb->globals);
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418 | }
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419 |
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420 | void
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421 | mrb_gc_mark_iv(mrb_state *mrb, struct RObject *obj)
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422 | {
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423 | mark_tbl(mrb, obj->iv);
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424 | }
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425 |
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426 | size_t
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427 | mrb_gc_mark_iv_size(mrb_state *mrb, struct RObject *obj)
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428 | {
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429 | return iv_size(mrb, obj->iv);
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430 | }
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431 |
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432 | void
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433 | mrb_gc_free_iv(mrb_state *mrb, struct RObject *obj)
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434 | {
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435 | if (obj->iv) {
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436 | iv_free(mrb, obj->iv);
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437 | }
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438 | }
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439 |
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440 | mrb_value
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441 | mrb_vm_special_get(mrb_state *mrb, mrb_sym i)
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442 | {
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443 | return mrb_fixnum_value(0);
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444 | }
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445 |
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446 | void
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447 | mrb_vm_special_set(mrb_state *mrb, mrb_sym i, mrb_value v)
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448 | {
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449 | }
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450 |
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451 | static mrb_bool
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452 | obj_iv_p(mrb_value obj)
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453 | {
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454 | switch (mrb_type(obj)) {
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455 | case MRB_TT_OBJECT:
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456 | case MRB_TT_CLASS:
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457 | case MRB_TT_MODULE:
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458 | case MRB_TT_SCLASS:
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459 | case MRB_TT_HASH:
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460 | case MRB_TT_DATA:
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461 | case MRB_TT_EXCEPTION:
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462 | return TRUE;
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463 | default:
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464 | return FALSE;
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465 | }
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466 | }
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467 |
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468 | MRB_API mrb_value
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469 | mrb_obj_iv_get(mrb_state *mrb, struct RObject *obj, mrb_sym sym)
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470 | {
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471 | mrb_value v;
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472 |
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473 | if (obj->iv && iv_get(mrb, obj->iv, sym, &v))
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474 | return v;
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475 | return mrb_nil_value();
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476 | }
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477 |
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478 | MRB_API mrb_value
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479 | mrb_iv_get(mrb_state *mrb, mrb_value obj, mrb_sym sym)
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480 | {
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481 | if (obj_iv_p(obj)) {
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482 | return mrb_obj_iv_get(mrb, mrb_obj_ptr(obj), sym);
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483 | }
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484 | return mrb_nil_value();
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485 | }
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486 |
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487 | MRB_API void
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488 | mrb_obj_iv_set(mrb_state *mrb, struct RObject *obj, mrb_sym sym, mrb_value v)
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489 | {
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490 | iv_tbl *t = obj->iv;
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491 |
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492 | if (!t) {
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493 | t = obj->iv = iv_new(mrb);
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494 | }
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495 | mrb_write_barrier(mrb, (struct RBasic*)obj);
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496 | iv_put(mrb, t, sym, v);
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497 | }
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498 |
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---|
499 | MRB_API void
|
---|
500 | mrb_obj_iv_ifnone(mrb_state *mrb, struct RObject *obj, mrb_sym sym, mrb_value v)
|
---|
501 | {
|
---|
502 | iv_tbl *t = obj->iv;
|
---|
503 |
|
---|
504 | if (!t) {
|
---|
505 | t = obj->iv = iv_new(mrb);
|
---|
506 | }
|
---|
507 | else if (iv_get(mrb, t, sym, &v)) {
|
---|
508 | return;
|
---|
509 | }
|
---|
510 | mrb_write_barrier(mrb, (struct RBasic*)obj);
|
---|
511 | iv_put(mrb, t, sym, v);
|
---|
512 | }
|
---|
513 |
|
---|
514 | MRB_API void
|
---|
515 | mrb_iv_set(mrb_state *mrb, mrb_value obj, mrb_sym sym, mrb_value v)
|
---|
516 | {
|
---|
517 | if (obj_iv_p(obj)) {
|
---|
518 | mrb_obj_iv_set(mrb, mrb_obj_ptr(obj), sym, v);
|
---|
519 | }
|
---|
520 | else {
|
---|
521 | mrb_raise(mrb, E_ARGUMENT_ERROR, "cannot set instance variable");
|
---|
522 | }
|
---|
523 | }
|
---|
524 |
|
---|
525 | MRB_API mrb_bool
|
---|
526 | mrb_obj_iv_defined(mrb_state *mrb, struct RObject *obj, mrb_sym sym)
|
---|
527 | {
|
---|
528 | iv_tbl *t;
|
---|
529 |
|
---|
530 | t = obj->iv;
|
---|
531 | if (t) {
|
---|
532 | return iv_get(mrb, t, sym, NULL);
|
---|
533 | }
|
---|
534 | return FALSE;
|
---|
535 | }
|
---|
536 |
|
---|
537 | MRB_API mrb_bool
|
---|
538 | mrb_iv_defined(mrb_state *mrb, mrb_value obj, mrb_sym sym)
|
---|
539 | {
|
---|
540 | if (!obj_iv_p(obj)) return FALSE;
|
---|
541 | return mrb_obj_iv_defined(mrb, mrb_obj_ptr(obj), sym);
|
---|
542 | }
|
---|
543 |
|
---|
544 | #define identchar(c) (ISALNUM(c) || (c) == '_' || !ISASCII(c))
|
---|
545 |
|
---|
546 | MRB_API mrb_bool
|
---|
547 | mrb_iv_p(mrb_state *mrb, mrb_sym iv_name)
|
---|
548 | {
|
---|
549 | const char *s;
|
---|
550 | mrb_int i, len;
|
---|
551 |
|
---|
552 | s = mrb_sym2name_len(mrb, iv_name, &len);
|
---|
553 | if (len < 2) return FALSE;
|
---|
554 | if (s[0] != '@') return FALSE;
|
---|
555 | if (s[1] == '@') return FALSE;
|
---|
556 | for (i=1; i<len; i++) {
|
---|
557 | if (!identchar(s[i])) return FALSE;
|
---|
558 | }
|
---|
559 | return TRUE;
|
---|
560 | }
|
---|
561 |
|
---|
562 | MRB_API void
|
---|
563 | mrb_iv_check(mrb_state *mrb, mrb_sym iv_name)
|
---|
564 | {
|
---|
565 | if (!mrb_iv_p(mrb, iv_name)) {
|
---|
566 | mrb_name_error(mrb, iv_name, "'%S' is not allowed as an instance variable name", mrb_sym2str(mrb, iv_name));
|
---|
567 | }
|
---|
568 | }
|
---|
569 |
|
---|
570 | MRB_API void
|
---|
571 | mrb_iv_copy(mrb_state *mrb, mrb_value dest, mrb_value src)
|
---|
572 | {
|
---|
573 | struct RObject *d = mrb_obj_ptr(dest);
|
---|
574 | struct RObject *s = mrb_obj_ptr(src);
|
---|
575 |
|
---|
576 | if (d->iv) {
|
---|
577 | iv_free(mrb, d->iv);
|
---|
578 | d->iv = 0;
|
---|
579 | }
|
---|
580 | if (s->iv) {
|
---|
581 | mrb_write_barrier(mrb, (struct RBasic*)d);
|
---|
582 | d->iv = iv_copy(mrb, s->iv);
|
---|
583 | }
|
---|
584 | }
|
---|
585 |
|
---|
586 | static int
|
---|
587 | inspect_i(mrb_state *mrb, mrb_sym sym, mrb_value v, void *p)
|
---|
588 | {
|
---|
589 | mrb_value str = *(mrb_value*)p;
|
---|
590 | const char *s;
|
---|
591 | mrb_int len;
|
---|
592 | mrb_value ins;
|
---|
593 | char *sp = RSTRING_PTR(str);
|
---|
594 |
|
---|
595 | /* need not to show internal data */
|
---|
596 | if (sp[0] == '-') { /* first element */
|
---|
597 | sp[0] = '#';
|
---|
598 | mrb_str_cat_lit(mrb, str, " ");
|
---|
599 | }
|
---|
600 | else {
|
---|
601 | mrb_str_cat_lit(mrb, str, ", ");
|
---|
602 | }
|
---|
603 | s = mrb_sym2name_len(mrb, sym, &len);
|
---|
604 | mrb_str_cat(mrb, str, s, len);
|
---|
605 | mrb_str_cat_lit(mrb, str, "=");
|
---|
606 | if (mrb_type(v) == MRB_TT_OBJECT) {
|
---|
607 | ins = mrb_any_to_s(mrb, v);
|
---|
608 | }
|
---|
609 | else {
|
---|
610 | ins = mrb_inspect(mrb, v);
|
---|
611 | }
|
---|
612 | mrb_str_cat_str(mrb, str, ins);
|
---|
613 | return 0;
|
---|
614 | }
|
---|
615 |
|
---|
616 | mrb_value
|
---|
617 | mrb_obj_iv_inspect(mrb_state *mrb, struct RObject *obj)
|
---|
618 | {
|
---|
619 | iv_tbl *t = obj->iv;
|
---|
620 | size_t len = iv_size(mrb, t);
|
---|
621 |
|
---|
622 | if (len > 0) {
|
---|
623 | const char *cn = mrb_obj_classname(mrb, mrb_obj_value(obj));
|
---|
624 | mrb_value str = mrb_str_buf_new(mrb, 30);
|
---|
625 |
|
---|
626 | mrb_str_cat_lit(mrb, str, "-<");
|
---|
627 | mrb_str_cat_cstr(mrb, str, cn);
|
---|
628 | mrb_str_cat_lit(mrb, str, ":");
|
---|
629 | mrb_str_concat(mrb, str, mrb_ptr_to_str(mrb, obj));
|
---|
630 |
|
---|
631 | iv_foreach(mrb, t, inspect_i, &str);
|
---|
632 | mrb_str_cat_lit(mrb, str, ">");
|
---|
633 | return str;
|
---|
634 | }
|
---|
635 | return mrb_any_to_s(mrb, mrb_obj_value(obj));
|
---|
636 | }
|
---|
637 |
|
---|
638 | MRB_API mrb_value
|
---|
639 | mrb_iv_remove(mrb_state *mrb, mrb_value obj, mrb_sym sym)
|
---|
640 | {
|
---|
641 | if (obj_iv_p(obj)) {
|
---|
642 | iv_tbl *t = mrb_obj_ptr(obj)->iv;
|
---|
643 | mrb_value val;
|
---|
644 |
|
---|
645 | if (t && iv_del(mrb, t, sym, &val)) {
|
---|
646 | return val;
|
---|
647 | }
|
---|
648 | }
|
---|
649 | return mrb_undef_value();
|
---|
650 | }
|
---|
651 |
|
---|
652 | mrb_value
|
---|
653 | mrb_vm_iv_get(mrb_state *mrb, mrb_sym sym)
|
---|
654 | {
|
---|
655 | /* get self */
|
---|
656 | return mrb_iv_get(mrb, mrb->c->stack[0], sym);
|
---|
657 | }
|
---|
658 |
|
---|
659 | void
|
---|
660 | mrb_vm_iv_set(mrb_state *mrb, mrb_sym sym, mrb_value v)
|
---|
661 | {
|
---|
662 | /* get self */
|
---|
663 | mrb_iv_set(mrb, mrb->c->stack[0], sym, v);
|
---|
664 | }
|
---|
665 |
|
---|
666 | static int
|
---|
667 | iv_i(mrb_state *mrb, mrb_sym sym, mrb_value v, void *p)
|
---|
668 | {
|
---|
669 | mrb_value ary;
|
---|
670 | const char* s;
|
---|
671 | mrb_int len;
|
---|
672 |
|
---|
673 | ary = *(mrb_value*)p;
|
---|
674 | s = mrb_sym2name_len(mrb, sym, &len);
|
---|
675 | if (len > 1 && s[0] == '@' && s[1] != '@') {
|
---|
676 | mrb_ary_push(mrb, ary, mrb_symbol_value(sym));
|
---|
677 | }
|
---|
678 | return 0;
|
---|
679 | }
|
---|
680 |
|
---|
681 | /* 15.3.1.3.23 */
|
---|
682 | /*
|
---|
683 | * call-seq:
|
---|
684 | * obj.instance_variables -> array
|
---|
685 | *
|
---|
686 | * Returns an array of instance variable names for the receiver. Note
|
---|
687 | * that simply defining an accessor does not create the corresponding
|
---|
688 | * instance variable.
|
---|
689 | *
|
---|
690 | * class Fred
|
---|
691 | * attr_accessor :a1
|
---|
692 | * def initialize
|
---|
693 | * @iv = 3
|
---|
694 | * end
|
---|
695 | * end
|
---|
696 | * Fred.new.instance_variables #=> [:@iv]
|
---|
697 | */
|
---|
698 | mrb_value
|
---|
699 | mrb_obj_instance_variables(mrb_state *mrb, mrb_value self)
|
---|
700 | {
|
---|
701 | mrb_value ary;
|
---|
702 |
|
---|
703 | ary = mrb_ary_new(mrb);
|
---|
704 | if (obj_iv_p(self) && mrb_obj_ptr(self)->iv) {
|
---|
705 | iv_foreach(mrb, mrb_obj_ptr(self)->iv, iv_i, &ary);
|
---|
706 | }
|
---|
707 | return ary;
|
---|
708 | }
|
---|
709 |
|
---|
710 | static int
|
---|
711 | cv_i(mrb_state *mrb, mrb_sym sym, mrb_value v, void *p)
|
---|
712 | {
|
---|
713 | mrb_value ary;
|
---|
714 | const char* s;
|
---|
715 | mrb_int len;
|
---|
716 |
|
---|
717 | ary = *(mrb_value*)p;
|
---|
718 | s = mrb_sym2name_len(mrb, sym, &len);
|
---|
719 | if (len > 2 && s[0] == '@' && s[1] == '@') {
|
---|
720 | mrb_ary_push(mrb, ary, mrb_symbol_value(sym));
|
---|
721 | }
|
---|
722 | return 0;
|
---|
723 | }
|
---|
724 |
|
---|
725 | /* 15.2.2.4.19 */
|
---|
726 | /*
|
---|
727 | * call-seq:
|
---|
728 | * mod.class_variables -> array
|
---|
729 | *
|
---|
730 | * Returns an array of the names of class variables in <i>mod</i>.
|
---|
731 | *
|
---|
732 | * class One
|
---|
733 | * @@var1 = 1
|
---|
734 | * end
|
---|
735 | * class Two < One
|
---|
736 | * @@var2 = 2
|
---|
737 | * end
|
---|
738 | * One.class_variables #=> [:@@var1]
|
---|
739 | * Two.class_variables #=> [:@@var2]
|
---|
740 | */
|
---|
741 | mrb_value
|
---|
742 | mrb_mod_class_variables(mrb_state *mrb, mrb_value mod)
|
---|
743 | {
|
---|
744 | mrb_value ary;
|
---|
745 | struct RClass *c;
|
---|
746 |
|
---|
747 | ary = mrb_ary_new(mrb);
|
---|
748 | c = mrb_class_ptr(mod);
|
---|
749 | while (c) {
|
---|
750 | if (c->iv) {
|
---|
751 | iv_foreach(mrb, c->iv, cv_i, &ary);
|
---|
752 | }
|
---|
753 | c = c->super;
|
---|
754 | }
|
---|
755 | return ary;
|
---|
756 | }
|
---|
757 |
|
---|
758 | MRB_API mrb_value
|
---|
759 | mrb_mod_cv_get(mrb_state *mrb, struct RClass * c, mrb_sym sym)
|
---|
760 | {
|
---|
761 | struct RClass * cls = c;
|
---|
762 | mrb_value v;
|
---|
763 |
|
---|
764 | while (c) {
|
---|
765 | if (c->iv && iv_get(mrb, c->iv, sym, &v)) {
|
---|
766 | return v;
|
---|
767 | }
|
---|
768 | c = c->super;
|
---|
769 | }
|
---|
770 | if (cls && cls->tt == MRB_TT_SCLASS) {
|
---|
771 | mrb_value klass;
|
---|
772 |
|
---|
773 | klass = mrb_obj_iv_get(mrb, (struct RObject *)cls,
|
---|
774 | mrb_intern_lit(mrb, "__attached__"));
|
---|
775 | c = mrb_class_ptr(klass);
|
---|
776 | if (c->tt == MRB_TT_CLASS) {
|
---|
777 | while (c) {
|
---|
778 | if (c->iv && iv_get(mrb, c->iv, sym, &v)) {
|
---|
779 | return v;
|
---|
780 | }
|
---|
781 | c = c->super;
|
---|
782 | }
|
---|
783 | }
|
---|
784 | }
|
---|
785 | mrb_name_error(mrb, sym, "uninitialized class variable %S in %S",
|
---|
786 | mrb_sym2str(mrb, sym), mrb_obj_value(cls));
|
---|
787 | /* not reached */
|
---|
788 | return mrb_nil_value();
|
---|
789 | }
|
---|
790 |
|
---|
791 | MRB_API mrb_value
|
---|
792 | mrb_cv_get(mrb_state *mrb, mrb_value mod, mrb_sym sym)
|
---|
793 | {
|
---|
794 | return mrb_mod_cv_get(mrb, mrb_class_ptr(mod), sym);
|
---|
795 | }
|
---|
796 |
|
---|
797 | MRB_API void
|
---|
798 | mrb_mod_cv_set(mrb_state *mrb, struct RClass *c, mrb_sym sym, mrb_value v)
|
---|
799 | {
|
---|
800 | struct RClass * cls = c;
|
---|
801 |
|
---|
802 | while (c) {
|
---|
803 | if (c->iv) {
|
---|
804 | iv_tbl *t = c->iv;
|
---|
805 |
|
---|
806 | if (iv_get(mrb, t, sym, NULL)) {
|
---|
807 | mrb_write_barrier(mrb, (struct RBasic*)c);
|
---|
808 | iv_put(mrb, t, sym, v);
|
---|
809 | return;
|
---|
810 | }
|
---|
811 | }
|
---|
812 | c = c->super;
|
---|
813 | }
|
---|
814 |
|
---|
815 | if (!cls->iv) {
|
---|
816 | cls->iv = iv_new(mrb);
|
---|
817 | }
|
---|
818 |
|
---|
819 | mrb_write_barrier(mrb, (struct RBasic*)cls);
|
---|
820 | iv_put(mrb, cls->iv, sym, v);
|
---|
821 | }
|
---|
822 |
|
---|
823 | MRB_API void
|
---|
824 | mrb_cv_set(mrb_state *mrb, mrb_value mod, mrb_sym sym, mrb_value v)
|
---|
825 | {
|
---|
826 | mrb_mod_cv_set(mrb, mrb_class_ptr(mod), sym, v);
|
---|
827 | }
|
---|
828 |
|
---|
829 | MRB_API mrb_bool
|
---|
830 | mrb_mod_cv_defined(mrb_state *mrb, struct RClass * c, mrb_sym sym)
|
---|
831 | {
|
---|
832 | while (c) {
|
---|
833 | if (c->iv) {
|
---|
834 | iv_tbl *t = c->iv;
|
---|
835 | if (iv_get(mrb, t, sym, NULL)) return TRUE;
|
---|
836 | }
|
---|
837 | c = c->super;
|
---|
838 | }
|
---|
839 |
|
---|
840 | return FALSE;
|
---|
841 | }
|
---|
842 |
|
---|
843 | MRB_API mrb_bool
|
---|
844 | mrb_cv_defined(mrb_state *mrb, mrb_value mod, mrb_sym sym)
|
---|
845 | {
|
---|
846 | return mrb_mod_cv_defined(mrb, mrb_class_ptr(mod), sym);
|
---|
847 | }
|
---|
848 |
|
---|
849 | mrb_value
|
---|
850 | mrb_vm_cv_get(mrb_state *mrb, mrb_sym sym)
|
---|
851 | {
|
---|
852 | struct RClass *c = mrb->c->ci->proc->target_class;
|
---|
853 |
|
---|
854 | if (!c) c = mrb->c->ci->target_class;
|
---|
855 |
|
---|
856 | return mrb_mod_cv_get(mrb, c, sym);
|
---|
857 | }
|
---|
858 |
|
---|
859 | void
|
---|
860 | mrb_vm_cv_set(mrb_state *mrb, mrb_sym sym, mrb_value v)
|
---|
861 | {
|
---|
862 | struct RClass *c = mrb->c->ci->proc->target_class;
|
---|
863 |
|
---|
864 | if (!c) c = mrb->c->ci->target_class;
|
---|
865 | mrb_mod_cv_set(mrb, c, sym, v);
|
---|
866 | }
|
---|
867 |
|
---|
868 | static void
|
---|
869 | mod_const_check(mrb_state *mrb, mrb_value mod)
|
---|
870 | {
|
---|
871 | switch (mrb_type(mod)) {
|
---|
872 | case MRB_TT_CLASS:
|
---|
873 | case MRB_TT_MODULE:
|
---|
874 | case MRB_TT_SCLASS:
|
---|
875 | break;
|
---|
876 | default:
|
---|
877 | mrb_raise(mrb, E_TYPE_ERROR, "constant look-up for non class/module");
|
---|
878 | break;
|
---|
879 | }
|
---|
880 | }
|
---|
881 |
|
---|
882 | static mrb_value
|
---|
883 | const_get(mrb_state *mrb, struct RClass *base, mrb_sym sym)
|
---|
884 | {
|
---|
885 | struct RClass *c = base;
|
---|
886 | mrb_value v;
|
---|
887 | iv_tbl *t;
|
---|
888 | mrb_bool retry = FALSE;
|
---|
889 | mrb_value name;
|
---|
890 |
|
---|
891 | L_RETRY:
|
---|
892 | while (c) {
|
---|
893 | if (c->iv) {
|
---|
894 | t = c->iv;
|
---|
895 | if (iv_get(mrb, t, sym, &v))
|
---|
896 | return v;
|
---|
897 | }
|
---|
898 | c = c->super;
|
---|
899 | }
|
---|
900 | if (!retry && base && base->tt == MRB_TT_MODULE) {
|
---|
901 | c = mrb->object_class;
|
---|
902 | retry = TRUE;
|
---|
903 | goto L_RETRY;
|
---|
904 | }
|
---|
905 | name = mrb_symbol_value(sym);
|
---|
906 | return mrb_funcall_argv(mrb, mrb_obj_value(base), mrb_intern_lit(mrb, "const_missing"), 1, &name);
|
---|
907 | }
|
---|
908 |
|
---|
909 | MRB_API mrb_value
|
---|
910 | mrb_const_get(mrb_state *mrb, mrb_value mod, mrb_sym sym)
|
---|
911 | {
|
---|
912 | mod_const_check(mrb, mod);
|
---|
913 | return const_get(mrb, mrb_class_ptr(mod), sym);
|
---|
914 | }
|
---|
915 |
|
---|
916 | mrb_value
|
---|
917 | mrb_vm_const_get(mrb_state *mrb, mrb_sym sym)
|
---|
918 | {
|
---|
919 | struct RClass *c = mrb->c->ci->proc->target_class;
|
---|
920 |
|
---|
921 | if (!c) c = mrb->c->ci->target_class;
|
---|
922 | if (c) {
|
---|
923 | struct RClass *c2;
|
---|
924 | mrb_value v;
|
---|
925 |
|
---|
926 | if (c->iv && iv_get(mrb, c->iv, sym, &v)) {
|
---|
927 | return v;
|
---|
928 | }
|
---|
929 | if (c->tt == MRB_TT_SCLASS) {
|
---|
930 | mrb_value klass;
|
---|
931 | klass = mrb_obj_iv_get(mrb, (struct RObject *)c,
|
---|
932 | mrb_intern_lit(mrb, "__attached__"));
|
---|
933 | c2 = mrb_class_ptr(klass);
|
---|
934 | if (c2->tt == MRB_TT_CLASS)
|
---|
935 | c = c2;
|
---|
936 | }
|
---|
937 | c2 = c;
|
---|
938 | for (;;) {
|
---|
939 | c2 = mrb_class_outer_module(mrb, c2);
|
---|
940 | if (!c2) break;
|
---|
941 | if (c2->iv && iv_get(mrb, c2->iv, sym, &v)) {
|
---|
942 | return v;
|
---|
943 | }
|
---|
944 | }
|
---|
945 | }
|
---|
946 | return const_get(mrb, c, sym);
|
---|
947 | }
|
---|
948 |
|
---|
949 | MRB_API void
|
---|
950 | mrb_const_set(mrb_state *mrb, mrb_value mod, mrb_sym sym, mrb_value v)
|
---|
951 | {
|
---|
952 | mod_const_check(mrb, mod);
|
---|
953 | mrb_iv_set(mrb, mod, sym, v);
|
---|
954 | }
|
---|
955 |
|
---|
956 | void
|
---|
957 | mrb_vm_const_set(mrb_state *mrb, mrb_sym sym, mrb_value v)
|
---|
958 | {
|
---|
959 | struct RClass *c = mrb->c->ci->proc->target_class;
|
---|
960 |
|
---|
961 | if (!c) c = mrb->c->ci->target_class;
|
---|
962 | mrb_obj_iv_set(mrb, (struct RObject*)c, sym, v);
|
---|
963 | }
|
---|
964 |
|
---|
965 | MRB_API void
|
---|
966 | mrb_const_remove(mrb_state *mrb, mrb_value mod, mrb_sym sym)
|
---|
967 | {
|
---|
968 | mod_const_check(mrb, mod);
|
---|
969 | mrb_iv_remove(mrb, mod, sym);
|
---|
970 | }
|
---|
971 |
|
---|
972 | MRB_API void
|
---|
973 | mrb_define_const(mrb_state *mrb, struct RClass *mod, const char *name, mrb_value v)
|
---|
974 | {
|
---|
975 | mrb_obj_iv_set(mrb, (struct RObject*)mod, mrb_intern_cstr(mrb, name), v);
|
---|
976 | }
|
---|
977 |
|
---|
978 | MRB_API void
|
---|
979 | mrb_define_global_const(mrb_state *mrb, const char *name, mrb_value val)
|
---|
980 | {
|
---|
981 | mrb_define_const(mrb, mrb->object_class, name, val);
|
---|
982 | }
|
---|
983 |
|
---|
984 | static int
|
---|
985 | const_i(mrb_state *mrb, mrb_sym sym, mrb_value v, void *p)
|
---|
986 | {
|
---|
987 | mrb_value ary;
|
---|
988 | const char* s;
|
---|
989 | mrb_int len;
|
---|
990 |
|
---|
991 | ary = *(mrb_value*)p;
|
---|
992 | s = mrb_sym2name_len(mrb, sym, &len);
|
---|
993 | if (len >= 1 && ISUPPER(s[0])) {
|
---|
994 | mrb_ary_push(mrb, ary, mrb_symbol_value(sym));
|
---|
995 | }
|
---|
996 | return 0;
|
---|
997 | }
|
---|
998 |
|
---|
999 | /* 15.2.2.4.24 */
|
---|
1000 | /*
|
---|
1001 | * call-seq:
|
---|
1002 | * mod.constants -> array
|
---|
1003 | *
|
---|
1004 | * Returns an array of all names of contants defined in the receiver.
|
---|
1005 | */
|
---|
1006 | mrb_value
|
---|
1007 | mrb_mod_constants(mrb_state *mrb, mrb_value mod)
|
---|
1008 | {
|
---|
1009 | mrb_value ary;
|
---|
1010 | mrb_bool inherit = TRUE;
|
---|
1011 | struct RClass *c = mrb_class_ptr(mod);
|
---|
1012 |
|
---|
1013 | mrb_get_args(mrb, "|b", &inherit);
|
---|
1014 | ary = mrb_ary_new(mrb);
|
---|
1015 | while (c) {
|
---|
1016 | if (c->iv) {
|
---|
1017 | iv_foreach(mrb, c->iv, const_i, &ary);
|
---|
1018 | }
|
---|
1019 | if (!inherit) break;
|
---|
1020 | c = c->super;
|
---|
1021 | if (c == mrb->object_class) break;
|
---|
1022 | }
|
---|
1023 | return ary;
|
---|
1024 | }
|
---|
1025 |
|
---|
1026 | MRB_API mrb_value
|
---|
1027 | mrb_gv_get(mrb_state *mrb, mrb_sym sym)
|
---|
1028 | {
|
---|
1029 | mrb_value v;
|
---|
1030 |
|
---|
1031 | if (!mrb->globals) {
|
---|
1032 | return mrb_nil_value();
|
---|
1033 | }
|
---|
1034 | if (iv_get(mrb, mrb->globals, sym, &v))
|
---|
1035 | return v;
|
---|
1036 | return mrb_nil_value();
|
---|
1037 | }
|
---|
1038 |
|
---|
1039 | MRB_API void
|
---|
1040 | mrb_gv_set(mrb_state *mrb, mrb_sym sym, mrb_value v)
|
---|
1041 | {
|
---|
1042 | iv_tbl *t;
|
---|
1043 |
|
---|
1044 | if (!mrb->globals) {
|
---|
1045 | t = mrb->globals = iv_new(mrb);
|
---|
1046 | }
|
---|
1047 | else {
|
---|
1048 | t = mrb->globals;
|
---|
1049 | }
|
---|
1050 | iv_put(mrb, t, sym, v);
|
---|
1051 | }
|
---|
1052 |
|
---|
1053 | MRB_API void
|
---|
1054 | mrb_gv_remove(mrb_state *mrb, mrb_sym sym)
|
---|
1055 | {
|
---|
1056 | if (!mrb->globals) {
|
---|
1057 | return;
|
---|
1058 | }
|
---|
1059 | iv_del(mrb, mrb->globals, sym, NULL);
|
---|
1060 | }
|
---|
1061 |
|
---|
1062 | static int
|
---|
1063 | gv_i(mrb_state *mrb, mrb_sym sym, mrb_value v, void *p)
|
---|
1064 | {
|
---|
1065 | mrb_value ary;
|
---|
1066 |
|
---|
1067 | ary = *(mrb_value*)p;
|
---|
1068 | mrb_ary_push(mrb, ary, mrb_symbol_value(sym));
|
---|
1069 | return 0;
|
---|
1070 | }
|
---|
1071 |
|
---|
1072 | /* 15.3.1.2.4 */
|
---|
1073 | /* 15.3.1.3.14 */
|
---|
1074 | /*
|
---|
1075 | * call-seq:
|
---|
1076 | * global_variables -> array
|
---|
1077 | *
|
---|
1078 | * Returns an array of the names of global variables.
|
---|
1079 | *
|
---|
1080 | * global_variables.grep /std/ #=> [:$stdin, :$stdout, :$stderr]
|
---|
1081 | */
|
---|
1082 | mrb_value
|
---|
1083 | mrb_f_global_variables(mrb_state *mrb, mrb_value self)
|
---|
1084 | {
|
---|
1085 | iv_tbl *t = mrb->globals;
|
---|
1086 | mrb_value ary = mrb_ary_new(mrb);
|
---|
1087 | size_t i;
|
---|
1088 | char buf[3];
|
---|
1089 |
|
---|
1090 | if (t) {
|
---|
1091 | iv_foreach(mrb, t, gv_i, &ary);
|
---|
1092 | }
|
---|
1093 | buf[0] = '$';
|
---|
1094 | buf[2] = 0;
|
---|
1095 | for (i = 1; i <= 9; ++i) {
|
---|
1096 | buf[1] = (char)(i + '0');
|
---|
1097 | mrb_ary_push(mrb, ary, mrb_symbol_value(mrb_intern(mrb, buf, 2)));
|
---|
1098 | }
|
---|
1099 | return ary;
|
---|
1100 | }
|
---|
1101 |
|
---|
1102 | static mrb_bool
|
---|
1103 | mrb_const_defined_0(mrb_state *mrb, mrb_value mod, mrb_sym id, mrb_bool exclude, mrb_bool recurse)
|
---|
1104 | {
|
---|
1105 | struct RClass *klass = mrb_class_ptr(mod);
|
---|
1106 | struct RClass *tmp;
|
---|
1107 | mrb_bool mod_retry = 0;
|
---|
1108 |
|
---|
1109 | tmp = klass;
|
---|
1110 | retry:
|
---|
1111 | while (tmp) {
|
---|
1112 | if (tmp->iv && iv_get(mrb, tmp->iv, id, NULL)) {
|
---|
1113 | return TRUE;
|
---|
1114 | }
|
---|
1115 | if (!recurse && (klass != mrb->object_class)) break;
|
---|
1116 | tmp = tmp->super;
|
---|
1117 | }
|
---|
1118 | if (!exclude && !mod_retry && (klass->tt == MRB_TT_MODULE)) {
|
---|
1119 | mod_retry = 1;
|
---|
1120 | tmp = mrb->object_class;
|
---|
1121 | goto retry;
|
---|
1122 | }
|
---|
1123 | return FALSE;
|
---|
1124 | }
|
---|
1125 |
|
---|
1126 | MRB_API mrb_bool
|
---|
1127 | mrb_const_defined(mrb_state *mrb, mrb_value mod, mrb_sym id)
|
---|
1128 | {
|
---|
1129 | return mrb_const_defined_0(mrb, mod, id, TRUE, TRUE);
|
---|
1130 | }
|
---|
1131 |
|
---|
1132 | MRB_API mrb_bool
|
---|
1133 | mrb_const_defined_at(mrb_state *mrb, mrb_value mod, mrb_sym id)
|
---|
1134 | {
|
---|
1135 | return mrb_const_defined_0(mrb, mod, id, TRUE, FALSE);
|
---|
1136 | }
|
---|
1137 |
|
---|
1138 | MRB_API mrb_value
|
---|
1139 | mrb_attr_get(mrb_state *mrb, mrb_value obj, mrb_sym id)
|
---|
1140 | {
|
---|
1141 | return mrb_iv_get(mrb, obj, id);
|
---|
1142 | }
|
---|
1143 |
|
---|
1144 | struct csym_arg {
|
---|
1145 | struct RClass *c;
|
---|
1146 | mrb_sym sym;
|
---|
1147 | };
|
---|
1148 |
|
---|
1149 | static int
|
---|
1150 | csym_i(mrb_state *mrb, mrb_sym sym, mrb_value v, void *p)
|
---|
1151 | {
|
---|
1152 | struct csym_arg *a = (struct csym_arg*)p;
|
---|
1153 | struct RClass *c = a->c;
|
---|
1154 |
|
---|
1155 | if (mrb_type(v) == c->tt && mrb_class_ptr(v) == c) {
|
---|
1156 | a->sym = sym;
|
---|
1157 | return 1; /* stop iteration */
|
---|
1158 | }
|
---|
1159 | return 0;
|
---|
1160 | }
|
---|
1161 |
|
---|
1162 | mrb_sym
|
---|
1163 | mrb_class_sym(mrb_state *mrb, struct RClass *c, struct RClass *outer)
|
---|
1164 | {
|
---|
1165 | mrb_value name;
|
---|
1166 |
|
---|
1167 | name = mrb_obj_iv_get(mrb, (struct RObject*)c, mrb_intern_lit(mrb, "__classid__"));
|
---|
1168 | if (mrb_nil_p(name)) {
|
---|
1169 |
|
---|
1170 | if (!outer) return 0;
|
---|
1171 | else {
|
---|
1172 | struct csym_arg arg;
|
---|
1173 |
|
---|
1174 | arg.c = c;
|
---|
1175 | arg.sym = 0;
|
---|
1176 | iv_foreach(mrb, outer->iv, csym_i, &arg);
|
---|
1177 | return arg.sym;
|
---|
1178 | }
|
---|
1179 | }
|
---|
1180 | return mrb_symbol(name);
|
---|
1181 | }
|
---|