[270] | 1 | /*
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| 2 | ** hash.c - Hash class
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| 3 | **
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| 4 | ** See Copyright Notice in mruby.h
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| 5 | */
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| 6 |
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[331] | 7 | #include <mruby.h>
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| 8 | #include <mruby/array.h>
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| 9 | #include <mruby/class.h>
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| 10 | #include <mruby/hash.h>
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| 11 | #include <mruby/khash.h>
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| 12 | #include <mruby/string.h>
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| 13 | #include <mruby/variable.h>
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[270] | 14 |
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| 15 | /* a function to get hash value of a float number */
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| 16 | mrb_int mrb_float_id(mrb_float f);
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| 17 |
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| 18 | static inline khint_t
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| 19 | mrb_hash_ht_hash_func(mrb_state *mrb, mrb_value key)
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| 20 | {
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| 21 | enum mrb_vtype t = mrb_type(key);
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| 22 | mrb_value hv;
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| 23 | const char *p;
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| 24 | mrb_int i, len;
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| 25 | khint_t h;
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| 26 |
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| 27 | switch (t) {
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| 28 | case MRB_TT_STRING:
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| 29 | p = RSTRING_PTR(key);
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| 30 | len = RSTRING_LEN(key);
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| 31 | h = 0;
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| 32 | for (i=0; i<len; i++) {
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| 33 | h = (h << 5) - h + *p++;
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| 34 | }
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| 35 | return h;
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| 36 |
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| 37 | case MRB_TT_SYMBOL:
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| 38 | h = (khint_t)mrb_symbol(key);
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| 39 | return kh_int_hash_func(mrb, h);
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| 40 |
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| 41 | case MRB_TT_FIXNUM:
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| 42 | h = (khint_t)mrb_float_id((mrb_float)mrb_fixnum(key));
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| 43 | return kh_int_hash_func(mrb, h);
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| 44 |
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| 45 | case MRB_TT_FLOAT:
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| 46 | h = (khint_t)mrb_float_id(mrb_float(key));
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| 47 | return kh_int_hash_func(mrb, h);
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| 48 |
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| 49 | default:
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| 50 | hv = mrb_funcall(mrb, key, "hash", 0);
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| 51 | h = (khint_t)t ^ mrb_fixnum(hv);
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| 52 | return kh_int_hash_func(mrb, h);
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| 53 | }
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| 54 | }
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| 55 |
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| 56 | static inline khint_t
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| 57 | mrb_hash_ht_hash_equal(mrb_state *mrb, mrb_value a, mrb_value b)
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| 58 | {
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| 59 | enum mrb_vtype t = mrb_type(a);
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| 60 |
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| 61 | switch (t) {
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| 62 | case MRB_TT_STRING:
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| 63 | return mrb_str_equal(mrb, a, b);
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| 64 |
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| 65 | case MRB_TT_SYMBOL:
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| 66 | if (mrb_type(b) != MRB_TT_SYMBOL) return FALSE;
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| 67 | return mrb_symbol(a) == mrb_symbol(b);
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| 68 |
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| 69 | case MRB_TT_FIXNUM:
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| 70 | switch (mrb_type(b)) {
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| 71 | case MRB_TT_FIXNUM:
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| 72 | return mrb_fixnum(a) == mrb_fixnum(b);
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| 73 | case MRB_TT_FLOAT:
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| 74 | return (mrb_float)mrb_fixnum(a) == mrb_float(b);
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| 75 | default:
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| 76 | return FALSE;
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| 77 | }
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| 78 |
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| 79 | case MRB_TT_FLOAT:
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| 80 | switch (mrb_type(b)) {
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| 81 | case MRB_TT_FIXNUM:
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| 82 | return mrb_float(a) == (mrb_float)mrb_fixnum(b);
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| 83 | case MRB_TT_FLOAT:
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| 84 | return mrb_float(a) == mrb_float(b);
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| 85 | default:
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| 86 | return FALSE;
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| 87 | }
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| 88 |
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| 89 | default:
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| 90 | return mrb_eql(mrb, a, b);
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| 91 | }
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| 92 | }
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| 93 |
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| 94 | KHASH_DEFINE (ht, mrb_value, mrb_hash_value, TRUE, mrb_hash_ht_hash_func, mrb_hash_ht_hash_equal)
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| 95 |
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| 96 | static void mrb_hash_modify(mrb_state *mrb, mrb_value hash);
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| 97 |
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| 98 | static inline mrb_value
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| 99 | mrb_hash_ht_key(mrb_state *mrb, mrb_value key)
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| 100 | {
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[331] | 101 | if (mrb_string_p(key) && !MRB_FROZEN_P(mrb_str_ptr(key))) {
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[270] | 102 | key = mrb_str_dup(mrb, key);
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[331] | 103 | MRB_SET_FROZEN_FLAG(mrb_str_ptr(key));
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[270] | 104 | }
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| 105 | return key;
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| 106 | }
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| 107 |
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| 108 | #define KEY(key) mrb_hash_ht_key(mrb, key)
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| 109 |
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| 110 | void
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| 111 | mrb_gc_mark_hash(mrb_state *mrb, struct RHash *hash)
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| 112 | {
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| 113 | khiter_t k;
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| 114 | khash_t(ht) *h = hash->ht;
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| 115 |
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| 116 | if (!h) return;
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| 117 | for (k = kh_begin(h); k != kh_end(h); k++) {
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| 118 | if (kh_exist(h, k)) {
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| 119 | mrb_value key = kh_key(h, k);
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| 120 | mrb_value val = kh_value(h, k).v;
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| 121 |
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| 122 | mrb_gc_mark_value(mrb, key);
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| 123 | mrb_gc_mark_value(mrb, val);
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| 124 | }
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| 125 | }
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| 126 | }
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| 127 |
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| 128 | size_t
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| 129 | mrb_gc_mark_hash_size(mrb_state *mrb, struct RHash *hash)
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| 130 | {
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| 131 | if (!hash->ht) return 0;
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| 132 | return kh_size(hash->ht)*2;
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| 133 | }
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| 134 |
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| 135 | void
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| 136 | mrb_gc_free_hash(mrb_state *mrb, struct RHash *hash)
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| 137 | {
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| 138 | if (hash->ht) kh_destroy(ht, mrb, hash->ht);
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| 139 | }
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| 140 |
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| 141 |
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| 142 | MRB_API mrb_value
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[331] | 143 | mrb_hash_new_capa(mrb_state *mrb, mrb_int capa)
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[270] | 144 | {
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| 145 | struct RHash *h;
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| 146 |
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| 147 | h = (struct RHash*)mrb_obj_alloc(mrb, MRB_TT_HASH, mrb->hash_class);
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| 148 | h->ht = kh_init(ht, mrb);
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| 149 | if (capa > 0) {
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| 150 | kh_resize(ht, mrb, h->ht, capa);
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| 151 | }
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| 152 | h->iv = 0;
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| 153 | return mrb_obj_value(h);
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| 154 | }
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| 155 |
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| 156 | MRB_API mrb_value
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| 157 | mrb_hash_new(mrb_state *mrb)
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| 158 | {
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| 159 | return mrb_hash_new_capa(mrb, 0);
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| 160 | }
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| 161 |
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[331] | 162 | static mrb_value mrb_hash_default(mrb_state *mrb, mrb_value hash);
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| 163 | static mrb_value hash_default(mrb_state *mrb, mrb_value hash, mrb_value key);
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| 164 |
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[270] | 165 | MRB_API mrb_value
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| 166 | mrb_hash_get(mrb_state *mrb, mrb_value hash, mrb_value key)
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| 167 | {
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| 168 | khash_t(ht) *h = RHASH_TBL(hash);
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| 169 | khiter_t k;
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[331] | 170 | mrb_sym mid;
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[270] | 171 |
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| 172 | if (h) {
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| 173 | k = kh_get(ht, mrb, h, key);
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| 174 | if (k != kh_end(h))
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| 175 | return kh_value(h, k).v;
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| 176 | }
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| 177 |
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[331] | 178 | mid = mrb_intern_lit(mrb, "default");
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| 179 | if (mrb_func_basic_p(mrb, hash, mid, mrb_hash_default)) {
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| 180 | return hash_default(mrb, hash, key);
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[270] | 181 | }
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[331] | 182 | /* xxx mrb_funcall_tailcall(mrb, hash, "default", 1, key); */
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| 183 | return mrb_funcall_argv(mrb, hash, mid, 1, &key);
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[270] | 184 | }
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| 185 |
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| 186 | MRB_API mrb_value
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| 187 | mrb_hash_fetch(mrb_state *mrb, mrb_value hash, mrb_value key, mrb_value def)
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| 188 | {
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| 189 | khash_t(ht) *h = RHASH_TBL(hash);
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| 190 | khiter_t k;
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| 191 |
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| 192 | if (h) {
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| 193 | k = kh_get(ht, mrb, h, key);
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| 194 | if (k != kh_end(h))
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| 195 | return kh_value(h, k).v;
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| 196 | }
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| 197 |
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| 198 | /* not found */
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| 199 | return def;
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| 200 | }
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| 201 |
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| 202 | MRB_API void
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| 203 | mrb_hash_set(mrb_state *mrb, mrb_value hash, mrb_value key, mrb_value val)
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| 204 | {
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| 205 | khash_t(ht) *h;
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| 206 | khiter_t k;
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| 207 | int r;
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| 208 |
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| 209 | mrb_hash_modify(mrb, hash);
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| 210 | h = RHASH_TBL(hash);
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| 211 |
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| 212 | if (!h) h = RHASH_TBL(hash) = kh_init(ht, mrb);
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| 213 | k = kh_put2(ht, mrb, h, key, &r);
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| 214 | kh_value(h, k).v = val;
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| 215 |
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| 216 | if (r != 0) {
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| 217 | /* expand */
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| 218 | int ai = mrb_gc_arena_save(mrb);
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| 219 | key = kh_key(h, k) = KEY(key);
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| 220 | mrb_gc_arena_restore(mrb, ai);
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| 221 | kh_value(h, k).n = kh_size(h)-1;
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| 222 | }
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| 223 |
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| 224 | mrb_field_write_barrier_value(mrb, (struct RBasic*)RHASH(hash), key);
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| 225 | mrb_field_write_barrier_value(mrb, (struct RBasic*)RHASH(hash), val);
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| 226 | return;
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| 227 | }
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| 228 |
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| 229 | static mrb_value
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| 230 | mrb_hash_dup(mrb_state *mrb, mrb_value hash)
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| 231 | {
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| 232 | struct RHash* ret;
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| 233 | khash_t(ht) *h, *ret_h;
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| 234 | khiter_t k, ret_k;
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[331] | 235 | mrb_value ifnone, vret;
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[270] | 236 |
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| 237 | h = RHASH_TBL(hash);
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| 238 | ret = (struct RHash*)mrb_obj_alloc(mrb, MRB_TT_HASH, mrb->hash_class);
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| 239 | ret->ht = kh_init(ht, mrb);
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| 240 |
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[331] | 241 | if (h && kh_size(h) > 0) {
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[270] | 242 | ret_h = ret->ht;
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| 243 |
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| 244 | for (k = kh_begin(h); k != kh_end(h); k++) {
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| 245 | if (kh_exist(h, k)) {
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| 246 | int ai = mrb_gc_arena_save(mrb);
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| 247 | ret_k = kh_put(ht, mrb, ret_h, KEY(kh_key(h, k)));
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| 248 | mrb_gc_arena_restore(mrb, ai);
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[331] | 249 | kh_val(ret_h, ret_k).v = kh_val(h, k).v;
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| 250 | kh_val(ret_h, ret_k).n = kh_size(ret_h)-1;
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[270] | 251 | }
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| 252 | }
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| 253 | }
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| 254 |
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[331] | 255 | if (MRB_RHASH_DEFAULT_P(hash)) {
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| 256 | ret->flags |= MRB_HASH_DEFAULT;
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| 257 | }
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| 258 | if (MRB_RHASH_PROCDEFAULT_P(hash)) {
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| 259 | ret->flags |= MRB_HASH_PROC_DEFAULT;
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| 260 | }
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| 261 | vret = mrb_obj_value(ret);
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| 262 | ifnone = RHASH_IFNONE(hash);
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| 263 | if (!mrb_nil_p(ifnone)) {
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| 264 | mrb_iv_set(mrb, vret, mrb_intern_lit(mrb, "ifnone"), ifnone);
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| 265 | }
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| 266 | return vret;
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[270] | 267 | }
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| 268 |
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| 269 | MRB_API mrb_value
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| 270 | mrb_check_hash_type(mrb_state *mrb, mrb_value hash)
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| 271 | {
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| 272 | return mrb_check_convert_type(mrb, hash, MRB_TT_HASH, "Hash", "to_hash");
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| 273 | }
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| 274 |
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| 275 | MRB_API khash_t(ht)*
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| 276 | mrb_hash_tbl(mrb_state *mrb, mrb_value hash)
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| 277 | {
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| 278 | khash_t(ht) *h = RHASH_TBL(hash);
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| 279 |
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| 280 | if (!h) {
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| 281 | return RHASH_TBL(hash) = kh_init(ht, mrb);
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| 282 | }
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| 283 | return h;
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| 284 | }
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| 285 |
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| 286 | static void
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| 287 | mrb_hash_modify(mrb_state *mrb, mrb_value hash)
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| 288 | {
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[331] | 289 | if (MRB_FROZEN_P(mrb_hash_ptr(hash))) {
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| 290 | mrb_raise(mrb, E_RUNTIME_ERROR, "can't modify frozen hash");
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| 291 | }
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[270] | 292 | mrb_hash_tbl(mrb, hash);
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| 293 | }
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| 294 |
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| 295 | /* 15.2.13.4.16 */
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| 296 | /*
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| 297 | * call-seq:
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| 298 | * Hash.new -> new_hash
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| 299 | * Hash.new(obj) -> new_hash
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| 300 | * Hash.new {|hash, key| block } -> new_hash
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| 301 | *
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| 302 | * Returns a new, empty hash. If this hash is subsequently accessed by
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| 303 | * a key that doesn't correspond to a hash entry, the value returned
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| 304 | * depends on the style of <code>new</code> used to create the hash. In
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| 305 | * the first form, the access returns <code>nil</code>. If
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| 306 | * <i>obj</i> is specified, this single object will be used for
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| 307 | * all <em>default values</em>. If a block is specified, it will be
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| 308 | * called with the hash object and the key, and should return the
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| 309 | * default value. It is the block's responsibility to store the value
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| 310 | * in the hash if required.
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| 311 | *
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| 312 | * h = Hash.new("Go Fish")
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| 313 | * h["a"] = 100
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| 314 | * h["b"] = 200
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| 315 | * h["a"] #=> 100
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| 316 | * h["c"] #=> "Go Fish"
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| 317 | * # The following alters the single default object
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| 318 | * h["c"].upcase! #=> "GO FISH"
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| 319 | * h["d"] #=> "GO FISH"
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| 320 | * h.keys #=> ["a", "b"]
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| 321 | *
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| 322 | * # While this creates a new default object each time
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| 323 | * h = Hash.new { |hash, key| hash[key] = "Go Fish: #{key}" }
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| 324 | * h["c"] #=> "Go Fish: c"
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| 325 | * h["c"].upcase! #=> "GO FISH: C"
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| 326 | * h["d"] #=> "Go Fish: d"
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| 327 | * h.keys #=> ["c", "d"]
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| 328 | *
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| 329 | */
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| 330 |
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| 331 | static mrb_value
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| 332 | mrb_hash_init(mrb_state *mrb, mrb_value hash)
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| 333 | {
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| 334 | mrb_value block, ifnone;
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| 335 | mrb_bool ifnone_p;
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| 336 |
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| 337 | ifnone = mrb_nil_value();
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| 338 | mrb_get_args(mrb, "&|o?", &block, &ifnone, &ifnone_p);
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| 339 | mrb_hash_modify(mrb, hash);
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| 340 | if (!mrb_nil_p(block)) {
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| 341 | if (ifnone_p) {
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| 342 | mrb_raise(mrb, E_ARGUMENT_ERROR, "wrong number of arguments");
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| 343 | }
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| 344 | RHASH(hash)->flags |= MRB_HASH_PROC_DEFAULT;
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| 345 | ifnone = block;
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| 346 | }
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[331] | 347 | if (!mrb_nil_p(ifnone)) {
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| 348 | RHASH(hash)->flags |= MRB_HASH_DEFAULT;
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| 349 | mrb_iv_set(mrb, hash, mrb_intern_lit(mrb, "ifnone"), ifnone);
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| 350 | }
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[270] | 351 | return hash;
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| 352 | }
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| 353 |
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| 354 | /* 15.2.13.4.2 */
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| 355 | /*
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| 356 | * call-seq:
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| 357 | * hsh[key] -> value
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| 358 | *
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| 359 | * Element Reference---Retrieves the <i>value</i> object corresponding
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| 360 | * to the <i>key</i> object. If not found, returns the default value (see
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| 361 | * <code>Hash::new</code> for details).
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| 362 | *
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| 363 | * h = { "a" => 100, "b" => 200 }
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| 364 | * h["a"] #=> 100
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| 365 | * h["c"] #=> nil
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| 366 | *
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| 367 | */
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| 368 | static mrb_value
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| 369 | mrb_hash_aget(mrb_state *mrb, mrb_value self)
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| 370 | {
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| 371 | mrb_value key;
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| 372 |
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| 373 | mrb_get_args(mrb, "o", &key);
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| 374 | return mrb_hash_get(mrb, self, key);
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| 375 | }
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| 376 |
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[331] | 377 | static mrb_value
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| 378 | hash_default(mrb_state *mrb, mrb_value hash, mrb_value key)
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| 379 | {
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| 380 | if (MRB_RHASH_DEFAULT_P(hash)) {
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| 381 | if (MRB_RHASH_PROCDEFAULT_P(hash)) {
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| 382 | return mrb_funcall(mrb, RHASH_PROCDEFAULT(hash), "call", 2, hash, key);
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| 383 | }
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| 384 | else {
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| 385 | return RHASH_IFNONE(hash);
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| 386 | }
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| 387 | }
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| 388 | return mrb_nil_value();
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| 389 | }
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| 390 |
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[270] | 391 | /* 15.2.13.4.5 */
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| 392 | /*
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| 393 | * call-seq:
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| 394 | * hsh.default(key=nil) -> obj
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| 395 | *
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| 396 | * Returns the default value, the value that would be returned by
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| 397 | * <i>hsh</i>[<i>key</i>] if <i>key</i> did not exist in <i>hsh</i>.
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| 398 | * See also <code>Hash::new</code> and <code>Hash#default=</code>.
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| 399 | *
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| 400 | * h = Hash.new #=> {}
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| 401 | * h.default #=> nil
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| 402 | * h.default(2) #=> nil
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| 403 | *
|
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| 404 | * h = Hash.new("cat") #=> {}
|
---|
| 405 | * h.default #=> "cat"
|
---|
| 406 | * h.default(2) #=> "cat"
|
---|
| 407 | *
|
---|
| 408 | * h = Hash.new {|h,k| h[k] = k.to_i*10} #=> {}
|
---|
| 409 | * h.default #=> nil
|
---|
| 410 | * h.default(2) #=> 20
|
---|
| 411 | */
|
---|
| 412 |
|
---|
| 413 | static mrb_value
|
---|
| 414 | mrb_hash_default(mrb_state *mrb, mrb_value hash)
|
---|
| 415 | {
|
---|
| 416 | mrb_value key;
|
---|
| 417 | mrb_bool given;
|
---|
| 418 |
|
---|
| 419 | mrb_get_args(mrb, "|o?", &key, &given);
|
---|
[331] | 420 | if (MRB_RHASH_DEFAULT_P(hash)) {
|
---|
| 421 | if (MRB_RHASH_PROCDEFAULT_P(hash)) {
|
---|
| 422 | if (!given) return mrb_nil_value();
|
---|
| 423 | return mrb_funcall(mrb, RHASH_PROCDEFAULT(hash), "call", 2, hash, key);
|
---|
| 424 | }
|
---|
| 425 | else {
|
---|
| 426 | return RHASH_IFNONE(hash);
|
---|
| 427 | }
|
---|
[270] | 428 | }
|
---|
[331] | 429 | return mrb_nil_value();
|
---|
[270] | 430 | }
|
---|
| 431 |
|
---|
| 432 | /* 15.2.13.4.6 */
|
---|
| 433 | /*
|
---|
| 434 | * call-seq:
|
---|
| 435 | * hsh.default = obj -> obj
|
---|
| 436 | *
|
---|
| 437 | * Sets the default value, the value returned for a key that does not
|
---|
| 438 | * exist in the hash. It is not possible to set the default to a
|
---|
| 439 | * <code>Proc</code> that will be executed on each key lookup.
|
---|
| 440 | *
|
---|
| 441 | * h = { "a" => 100, "b" => 200 }
|
---|
| 442 | * h.default = "Go fish"
|
---|
| 443 | * h["a"] #=> 100
|
---|
| 444 | * h["z"] #=> "Go fish"
|
---|
| 445 | * # This doesn't do what you might hope...
|
---|
| 446 | * h.default = proc do |hash, key|
|
---|
| 447 | * hash[key] = key + key
|
---|
| 448 | * end
|
---|
| 449 | * h[2] #=> #<Proc:0x401b3948@-:6>
|
---|
| 450 | * h["cat"] #=> #<Proc:0x401b3948@-:6>
|
---|
| 451 | */
|
---|
| 452 |
|
---|
| 453 | static mrb_value
|
---|
| 454 | mrb_hash_set_default(mrb_state *mrb, mrb_value hash)
|
---|
| 455 | {
|
---|
| 456 | mrb_value ifnone;
|
---|
| 457 |
|
---|
| 458 | mrb_get_args(mrb, "o", &ifnone);
|
---|
| 459 | mrb_hash_modify(mrb, hash);
|
---|
| 460 | mrb_iv_set(mrb, hash, mrb_intern_lit(mrb, "ifnone"), ifnone);
|
---|
[331] | 461 | RHASH(hash)->flags &= ~MRB_HASH_PROC_DEFAULT;
|
---|
| 462 | if (!mrb_nil_p(ifnone)) {
|
---|
| 463 | RHASH(hash)->flags |= MRB_HASH_DEFAULT;
|
---|
| 464 | }
|
---|
| 465 | else {
|
---|
| 466 | RHASH(hash)->flags &= ~MRB_HASH_DEFAULT;
|
---|
| 467 | }
|
---|
[270] | 468 | return ifnone;
|
---|
| 469 | }
|
---|
| 470 |
|
---|
| 471 | /* 15.2.13.4.7 */
|
---|
| 472 | /*
|
---|
| 473 | * call-seq:
|
---|
| 474 | * hsh.default_proc -> anObject
|
---|
| 475 | *
|
---|
| 476 | * If <code>Hash::new</code> was invoked with a block, return that
|
---|
| 477 | * block, otherwise return <code>nil</code>.
|
---|
| 478 | *
|
---|
| 479 | * h = Hash.new {|h,k| h[k] = k*k } #=> {}
|
---|
| 480 | * p = h.default_proc #=> #<Proc:0x401b3d08@-:1>
|
---|
| 481 | * a = [] #=> []
|
---|
| 482 | * p.call(a, 2)
|
---|
| 483 | * a #=> [nil, nil, 4]
|
---|
| 484 | */
|
---|
| 485 |
|
---|
| 486 |
|
---|
| 487 | static mrb_value
|
---|
| 488 | mrb_hash_default_proc(mrb_state *mrb, mrb_value hash)
|
---|
| 489 | {
|
---|
| 490 | if (MRB_RHASH_PROCDEFAULT_P(hash)) {
|
---|
| 491 | return RHASH_PROCDEFAULT(hash);
|
---|
| 492 | }
|
---|
| 493 | return mrb_nil_value();
|
---|
| 494 | }
|
---|
| 495 |
|
---|
| 496 | /*
|
---|
| 497 | * call-seq:
|
---|
| 498 | * hsh.default_proc = proc_obj -> proc_obj
|
---|
| 499 | *
|
---|
| 500 | * Sets the default proc to be executed on each key lookup.
|
---|
| 501 | *
|
---|
| 502 | * h.default_proc = proc do |hash, key|
|
---|
| 503 | * hash[key] = key + key
|
---|
| 504 | * end
|
---|
| 505 | * h[2] #=> 4
|
---|
| 506 | * h["cat"] #=> "catcat"
|
---|
| 507 | */
|
---|
| 508 |
|
---|
| 509 | static mrb_value
|
---|
| 510 | mrb_hash_set_default_proc(mrb_state *mrb, mrb_value hash)
|
---|
| 511 | {
|
---|
| 512 | mrb_value ifnone;
|
---|
| 513 |
|
---|
| 514 | mrb_get_args(mrb, "o", &ifnone);
|
---|
| 515 | mrb_hash_modify(mrb, hash);
|
---|
| 516 | mrb_iv_set(mrb, hash, mrb_intern_lit(mrb, "ifnone"), ifnone);
|
---|
[331] | 517 | if (!mrb_nil_p(ifnone)) {
|
---|
| 518 | RHASH(hash)->flags |= MRB_HASH_PROC_DEFAULT;
|
---|
| 519 | RHASH(hash)->flags |= MRB_HASH_DEFAULT;
|
---|
| 520 | }
|
---|
| 521 | else {
|
---|
| 522 | RHASH(hash)->flags &= ~MRB_HASH_DEFAULT;
|
---|
| 523 | RHASH(hash)->flags &= ~MRB_HASH_PROC_DEFAULT;
|
---|
| 524 | }
|
---|
[270] | 525 |
|
---|
| 526 | return ifnone;
|
---|
| 527 | }
|
---|
| 528 |
|
---|
| 529 | MRB_API mrb_value
|
---|
| 530 | mrb_hash_delete_key(mrb_state *mrb, mrb_value hash, mrb_value key)
|
---|
| 531 | {
|
---|
| 532 | khash_t(ht) *h = RHASH_TBL(hash);
|
---|
| 533 | khiter_t k;
|
---|
| 534 | mrb_value delVal;
|
---|
| 535 | mrb_int n;
|
---|
| 536 |
|
---|
| 537 | if (h) {
|
---|
| 538 | k = kh_get(ht, mrb, h, key);
|
---|
| 539 | if (k != kh_end(h)) {
|
---|
| 540 | delVal = kh_value(h, k).v;
|
---|
| 541 | n = kh_value(h, k).n;
|
---|
| 542 | kh_del(ht, mrb, h, k);
|
---|
| 543 | for (k = kh_begin(h); k != kh_end(h); k++) {
|
---|
| 544 | if (!kh_exist(h, k)) continue;
|
---|
| 545 | if (kh_value(h, k).n > n) kh_value(h, k).n--;
|
---|
| 546 | }
|
---|
| 547 | return delVal;
|
---|
| 548 | }
|
---|
| 549 | }
|
---|
| 550 |
|
---|
| 551 | /* not found */
|
---|
| 552 | return mrb_nil_value();
|
---|
| 553 | }
|
---|
| 554 |
|
---|
| 555 | /* 15.2.13.4.8 */
|
---|
| 556 | /*
|
---|
| 557 | * call-seq:
|
---|
| 558 | * hsh.delete(key) -> value
|
---|
| 559 | * hsh.delete(key) {| key | block } -> value
|
---|
| 560 | *
|
---|
| 561 | * Deletes and returns a key-value pair from <i>hsh</i> whose key is
|
---|
| 562 | * equal to <i>key</i>. If the key is not found, returns the
|
---|
| 563 | * <em>default value</em>. If the optional code block is given and the
|
---|
| 564 | * key is not found, pass in the key and return the result of
|
---|
| 565 | * <i>block</i>.
|
---|
| 566 | *
|
---|
| 567 | * h = { "a" => 100, "b" => 200 }
|
---|
| 568 | * h.delete("a") #=> 100
|
---|
| 569 | * h.delete("z") #=> nil
|
---|
| 570 | * h.delete("z") { |el| "#{el} not found" } #=> "z not found"
|
---|
| 571 | *
|
---|
| 572 | */
|
---|
| 573 | static mrb_value
|
---|
| 574 | mrb_hash_delete(mrb_state *mrb, mrb_value self)
|
---|
| 575 | {
|
---|
| 576 | mrb_value key;
|
---|
| 577 |
|
---|
| 578 | mrb_get_args(mrb, "o", &key);
|
---|
[331] | 579 | mrb_hash_modify(mrb, self);
|
---|
[270] | 580 | return mrb_hash_delete_key(mrb, self, key);
|
---|
| 581 | }
|
---|
| 582 |
|
---|
| 583 | /* 15.2.13.4.24 */
|
---|
| 584 | /*
|
---|
| 585 | * call-seq:
|
---|
| 586 | * hsh.shift -> anArray or obj
|
---|
| 587 | *
|
---|
| 588 | * Removes a key-value pair from <i>hsh</i> and returns it as the
|
---|
| 589 | * two-item array <code>[</code> <i>key, value</i> <code>]</code>, or
|
---|
| 590 | * the hash's default value if the hash is empty.
|
---|
| 591 | *
|
---|
| 592 | * h = { 1 => "a", 2 => "b", 3 => "c" }
|
---|
| 593 | * h.shift #=> [1, "a"]
|
---|
| 594 | * h #=> {2=>"b", 3=>"c"}
|
---|
| 595 | */
|
---|
| 596 |
|
---|
| 597 | static mrb_value
|
---|
| 598 | mrb_hash_shift(mrb_state *mrb, mrb_value hash)
|
---|
| 599 | {
|
---|
| 600 | khash_t(ht) *h = RHASH_TBL(hash);
|
---|
| 601 | khiter_t k;
|
---|
| 602 | mrb_value delKey, delVal;
|
---|
| 603 |
|
---|
| 604 | mrb_hash_modify(mrb, hash);
|
---|
| 605 | if (h && kh_size(h) > 0) {
|
---|
| 606 | for (k = kh_begin(h); k != kh_end(h); k++) {
|
---|
| 607 | if (!kh_exist(h, k)) continue;
|
---|
| 608 |
|
---|
| 609 | delKey = kh_key(h, k);
|
---|
| 610 | mrb_gc_protect(mrb, delKey);
|
---|
| 611 | delVal = mrb_hash_delete_key(mrb, hash, delKey);
|
---|
| 612 | mrb_gc_protect(mrb, delVal);
|
---|
| 613 |
|
---|
| 614 | return mrb_assoc_new(mrb, delKey, delVal);
|
---|
| 615 | }
|
---|
| 616 | }
|
---|
| 617 |
|
---|
[331] | 618 | if (MRB_RHASH_DEFAULT_P(hash)) {
|
---|
| 619 | if (MRB_RHASH_PROCDEFAULT_P(hash)) {
|
---|
| 620 | return mrb_funcall(mrb, RHASH_PROCDEFAULT(hash), "call", 2, hash, mrb_nil_value());
|
---|
| 621 | }
|
---|
| 622 | else {
|
---|
| 623 | return RHASH_IFNONE(hash);
|
---|
| 624 | }
|
---|
[270] | 625 | }
|
---|
[331] | 626 | return mrb_nil_value();
|
---|
[270] | 627 | }
|
---|
| 628 |
|
---|
| 629 | /* 15.2.13.4.4 */
|
---|
| 630 | /*
|
---|
| 631 | * call-seq:
|
---|
| 632 | * hsh.clear -> hsh
|
---|
| 633 | *
|
---|
| 634 | * Removes all key-value pairs from `hsh`.
|
---|
| 635 | *
|
---|
| 636 | * h = { "a" => 100, "b" => 200 } #=> {"a"=>100, "b"=>200}
|
---|
| 637 | * h.clear #=> {}
|
---|
| 638 | *
|
---|
| 639 | */
|
---|
| 640 |
|
---|
| 641 | MRB_API mrb_value
|
---|
| 642 | mrb_hash_clear(mrb_state *mrb, mrb_value hash)
|
---|
| 643 | {
|
---|
| 644 | khash_t(ht) *h = RHASH_TBL(hash);
|
---|
| 645 |
|
---|
[331] | 646 | mrb_hash_modify(mrb, hash);
|
---|
[270] | 647 | if (h) kh_clear(ht, mrb, h);
|
---|
| 648 | return hash;
|
---|
| 649 | }
|
---|
| 650 |
|
---|
| 651 | /* 15.2.13.4.3 */
|
---|
| 652 | /* 15.2.13.4.26 */
|
---|
| 653 | /*
|
---|
| 654 | * call-seq:
|
---|
| 655 | * hsh[key] = value -> value
|
---|
| 656 | * hsh.store(key, value) -> value
|
---|
| 657 | *
|
---|
| 658 | * Element Assignment---Associates the value given by
|
---|
| 659 | * <i>value</i> with the key given by <i>key</i>.
|
---|
| 660 | * <i>key</i> should not have its value changed while it is in
|
---|
| 661 | * use as a key (a <code>String</code> passed as a key will be
|
---|
| 662 | * duplicated and frozen).
|
---|
| 663 | *
|
---|
| 664 | * h = { "a" => 100, "b" => 200 }
|
---|
| 665 | * h["a"] = 9
|
---|
| 666 | * h["c"] = 4
|
---|
| 667 | * h #=> {"a"=>9, "b"=>200, "c"=>4}
|
---|
| 668 | *
|
---|
| 669 | */
|
---|
| 670 | static mrb_value
|
---|
| 671 | mrb_hash_aset(mrb_state *mrb, mrb_value self)
|
---|
| 672 | {
|
---|
| 673 | mrb_value key, val;
|
---|
| 674 |
|
---|
| 675 | mrb_get_args(mrb, "oo", &key, &val);
|
---|
| 676 | mrb_hash_set(mrb, self, key, val);
|
---|
| 677 | return val;
|
---|
| 678 | }
|
---|
| 679 |
|
---|
| 680 | /* 15.2.13.4.20 */
|
---|
| 681 | /* 15.2.13.4.25 */
|
---|
| 682 | /*
|
---|
| 683 | * call-seq:
|
---|
| 684 | * hsh.length -> fixnum
|
---|
| 685 | * hsh.size -> fixnum
|
---|
| 686 | *
|
---|
| 687 | * Returns the number of key-value pairs in the hash.
|
---|
| 688 | *
|
---|
| 689 | * h = { "d" => 100, "a" => 200, "v" => 300, "e" => 400 }
|
---|
| 690 | * h.length #=> 4
|
---|
| 691 | * h.delete("a") #=> 200
|
---|
| 692 | * h.length #=> 3
|
---|
| 693 | */
|
---|
| 694 | static mrb_value
|
---|
| 695 | mrb_hash_size_m(mrb_state *mrb, mrb_value self)
|
---|
| 696 | {
|
---|
| 697 | khash_t(ht) *h = RHASH_TBL(self);
|
---|
| 698 |
|
---|
| 699 | if (!h) return mrb_fixnum_value(0);
|
---|
| 700 | return mrb_fixnum_value(kh_size(h));
|
---|
| 701 | }
|
---|
| 702 |
|
---|
| 703 | /* 15.2.13.4.12 */
|
---|
| 704 | /*
|
---|
| 705 | * call-seq:
|
---|
| 706 | * hsh.empty? -> true or false
|
---|
| 707 | *
|
---|
| 708 | * Returns <code>true</code> if <i>hsh</i> contains no key-value pairs.
|
---|
| 709 | *
|
---|
| 710 | * {}.empty? #=> true
|
---|
| 711 | *
|
---|
| 712 | */
|
---|
| 713 | MRB_API mrb_value
|
---|
| 714 | mrb_hash_empty_p(mrb_state *mrb, mrb_value self)
|
---|
| 715 | {
|
---|
| 716 | khash_t(ht) *h = RHASH_TBL(self);
|
---|
| 717 |
|
---|
| 718 | if (h) return mrb_bool_value(kh_size(h) == 0);
|
---|
| 719 | return mrb_true_value();
|
---|
| 720 | }
|
---|
| 721 |
|
---|
| 722 | /* 15.2.13.4.29 (x)*/
|
---|
| 723 | /*
|
---|
| 724 | * call-seq:
|
---|
| 725 | * hsh.to_hash => hsh
|
---|
| 726 | *
|
---|
| 727 | * Returns +self+.
|
---|
| 728 | */
|
---|
| 729 |
|
---|
| 730 | static mrb_value
|
---|
| 731 | mrb_hash_to_hash(mrb_state *mrb, mrb_value hash)
|
---|
| 732 | {
|
---|
| 733 | return hash;
|
---|
| 734 | }
|
---|
| 735 |
|
---|
| 736 | /* 15.2.13.4.19 */
|
---|
| 737 | /*
|
---|
| 738 | * call-seq:
|
---|
| 739 | * hsh.keys -> array
|
---|
| 740 | *
|
---|
| 741 | * Returns a new array populated with the keys from this hash. See also
|
---|
| 742 | * <code>Hash#values</code>.
|
---|
| 743 | *
|
---|
| 744 | * h = { "a" => 100, "b" => 200, "c" => 300, "d" => 400 }
|
---|
| 745 | * h.keys #=> ["a", "b", "c", "d"]
|
---|
| 746 | *
|
---|
| 747 | */
|
---|
| 748 |
|
---|
| 749 | MRB_API mrb_value
|
---|
| 750 | mrb_hash_keys(mrb_state *mrb, mrb_value hash)
|
---|
| 751 | {
|
---|
| 752 | khash_t(ht) *h = RHASH_TBL(hash);
|
---|
| 753 | khiter_t k;
|
---|
[331] | 754 | mrb_int end;
|
---|
[270] | 755 | mrb_value ary;
|
---|
| 756 | mrb_value *p;
|
---|
| 757 |
|
---|
| 758 | if (!h || kh_size(h) == 0) return mrb_ary_new(mrb);
|
---|
| 759 | ary = mrb_ary_new_capa(mrb, kh_size(h));
|
---|
[331] | 760 | end = kh_size(h)-1;
|
---|
| 761 | mrb_ary_set(mrb, ary, end, mrb_nil_value());
|
---|
[270] | 762 | p = mrb_ary_ptr(ary)->ptr;
|
---|
| 763 | for (k = kh_begin(h); k != kh_end(h); k++) {
|
---|
| 764 | if (kh_exist(h, k)) {
|
---|
| 765 | mrb_value kv = kh_key(h, k);
|
---|
| 766 | mrb_hash_value hv = kh_value(h, k);
|
---|
| 767 |
|
---|
[331] | 768 | if (hv.n <= end) {
|
---|
| 769 | p[hv.n] = kv;
|
---|
| 770 | }
|
---|
| 771 | else {
|
---|
| 772 | p[end] = kv;
|
---|
| 773 | }
|
---|
[270] | 774 | }
|
---|
| 775 | }
|
---|
| 776 | return ary;
|
---|
| 777 | }
|
---|
| 778 |
|
---|
| 779 | /* 15.2.13.4.28 */
|
---|
| 780 | /*
|
---|
| 781 | * call-seq:
|
---|
| 782 | * hsh.values -> array
|
---|
| 783 | *
|
---|
| 784 | * Returns a new array populated with the values from <i>hsh</i>. See
|
---|
| 785 | * also <code>Hash#keys</code>.
|
---|
| 786 | *
|
---|
| 787 | * h = { "a" => 100, "b" => 200, "c" => 300 }
|
---|
| 788 | * h.values #=> [100, 200, 300]
|
---|
| 789 | *
|
---|
| 790 | */
|
---|
| 791 |
|
---|
[331] | 792 | MRB_API mrb_value
|
---|
[270] | 793 | mrb_hash_values(mrb_state *mrb, mrb_value hash)
|
---|
| 794 | {
|
---|
| 795 | khash_t(ht) *h = RHASH_TBL(hash);
|
---|
| 796 | khiter_t k;
|
---|
| 797 | mrb_value ary;
|
---|
| 798 |
|
---|
| 799 | if (!h) return mrb_ary_new(mrb);
|
---|
| 800 | ary = mrb_ary_new_capa(mrb, kh_size(h));
|
---|
| 801 | for (k = kh_begin(h); k != kh_end(h); k++) {
|
---|
| 802 | if (kh_exist(h, k)) {
|
---|
| 803 | mrb_hash_value hv = kh_value(h, k);
|
---|
| 804 |
|
---|
| 805 | mrb_ary_set(mrb, ary, hv.n, hv.v);
|
---|
| 806 | }
|
---|
| 807 | }
|
---|
| 808 | return ary;
|
---|
| 809 | }
|
---|
| 810 |
|
---|
| 811 | /* 15.2.13.4.13 */
|
---|
| 812 | /* 15.2.13.4.15 */
|
---|
| 813 | /* 15.2.13.4.18 */
|
---|
| 814 | /* 15.2.13.4.21 */
|
---|
| 815 | /*
|
---|
| 816 | * call-seq:
|
---|
| 817 | * hsh.has_key?(key) -> true or false
|
---|
| 818 | * hsh.include?(key) -> true or false
|
---|
| 819 | * hsh.key?(key) -> true or false
|
---|
| 820 | * hsh.member?(key) -> true or false
|
---|
| 821 | *
|
---|
| 822 | * Returns <code>true</code> if the given key is present in <i>hsh</i>.
|
---|
| 823 | *
|
---|
| 824 | * h = { "a" => 100, "b" => 200 }
|
---|
| 825 | * h.has_key?("a") #=> true
|
---|
| 826 | * h.has_key?("z") #=> false
|
---|
| 827 | *
|
---|
| 828 | */
|
---|
| 829 |
|
---|
| 830 | static mrb_value
|
---|
| 831 | mrb_hash_has_key(mrb_state *mrb, mrb_value hash)
|
---|
| 832 | {
|
---|
| 833 | mrb_value key;
|
---|
| 834 | khash_t(ht) *h;
|
---|
| 835 | khiter_t k;
|
---|
| 836 |
|
---|
| 837 | mrb_get_args(mrb, "o", &key);
|
---|
| 838 |
|
---|
| 839 | h = RHASH_TBL(hash);
|
---|
| 840 | if (h) {
|
---|
| 841 | k = kh_get(ht, mrb, h, key);
|
---|
| 842 | return mrb_bool_value(k != kh_end(h));
|
---|
| 843 | }
|
---|
| 844 | return mrb_false_value();
|
---|
| 845 | }
|
---|
| 846 |
|
---|
| 847 | /* 15.2.13.4.14 */
|
---|
| 848 | /* 15.2.13.4.27 */
|
---|
| 849 | /*
|
---|
| 850 | * call-seq:
|
---|
| 851 | * hsh.has_value?(value) -> true or false
|
---|
| 852 | * hsh.value?(value) -> true or false
|
---|
| 853 | *
|
---|
| 854 | * Returns <code>true</code> if the given value is present for some key
|
---|
| 855 | * in <i>hsh</i>.
|
---|
| 856 | *
|
---|
| 857 | * h = { "a" => 100, "b" => 200 }
|
---|
| 858 | * h.has_value?(100) #=> true
|
---|
| 859 | * h.has_value?(999) #=> false
|
---|
| 860 | */
|
---|
| 861 |
|
---|
| 862 | static mrb_value
|
---|
| 863 | mrb_hash_has_value(mrb_state *mrb, mrb_value hash)
|
---|
| 864 | {
|
---|
| 865 | mrb_value val;
|
---|
| 866 | khash_t(ht) *h;
|
---|
| 867 | khiter_t k;
|
---|
| 868 |
|
---|
| 869 | mrb_get_args(mrb, "o", &val);
|
---|
| 870 | h = RHASH_TBL(hash);
|
---|
| 871 |
|
---|
| 872 | if (h) {
|
---|
| 873 | for (k = kh_begin(h); k != kh_end(h); k++) {
|
---|
| 874 | if (!kh_exist(h, k)) continue;
|
---|
| 875 |
|
---|
| 876 | if (mrb_equal(mrb, kh_value(h, k).v, val)) {
|
---|
| 877 | return mrb_true_value();
|
---|
| 878 | }
|
---|
| 879 | }
|
---|
| 880 | }
|
---|
| 881 | return mrb_false_value();
|
---|
| 882 | }
|
---|
| 883 |
|
---|
| 884 | void
|
---|
| 885 | mrb_init_hash(mrb_state *mrb)
|
---|
| 886 | {
|
---|
| 887 | struct RClass *h;
|
---|
| 888 |
|
---|
| 889 | mrb->hash_class = h = mrb_define_class(mrb, "Hash", mrb->object_class); /* 15.2.13 */
|
---|
| 890 | MRB_SET_INSTANCE_TT(h, MRB_TT_HASH);
|
---|
| 891 |
|
---|
| 892 | mrb_define_method(mrb, h, "[]", mrb_hash_aget, MRB_ARGS_REQ(1)); /* 15.2.13.4.2 */
|
---|
| 893 | mrb_define_method(mrb, h, "[]=", mrb_hash_aset, MRB_ARGS_REQ(2)); /* 15.2.13.4.3 */
|
---|
| 894 | mrb_define_method(mrb, h, "clear", mrb_hash_clear, MRB_ARGS_NONE()); /* 15.2.13.4.4 */
|
---|
| 895 | mrb_define_method(mrb, h, "default", mrb_hash_default, MRB_ARGS_ANY()); /* 15.2.13.4.5 */
|
---|
| 896 | mrb_define_method(mrb, h, "default=", mrb_hash_set_default, MRB_ARGS_REQ(1)); /* 15.2.13.4.6 */
|
---|
| 897 | mrb_define_method(mrb, h, "default_proc", mrb_hash_default_proc,MRB_ARGS_NONE()); /* 15.2.13.4.7 */
|
---|
| 898 | mrb_define_method(mrb, h, "default_proc=", mrb_hash_set_default_proc,MRB_ARGS_REQ(1)); /* 15.2.13.4.7 */
|
---|
| 899 | mrb_define_method(mrb, h, "__delete", mrb_hash_delete, MRB_ARGS_REQ(1)); /* core of 15.2.13.4.8 */
|
---|
| 900 | mrb_define_method(mrb, h, "empty?", mrb_hash_empty_p, MRB_ARGS_NONE()); /* 15.2.13.4.12 */
|
---|
| 901 | mrb_define_method(mrb, h, "has_key?", mrb_hash_has_key, MRB_ARGS_REQ(1)); /* 15.2.13.4.13 */
|
---|
| 902 | mrb_define_method(mrb, h, "has_value?", mrb_hash_has_value, MRB_ARGS_REQ(1)); /* 15.2.13.4.14 */
|
---|
| 903 | mrb_define_method(mrb, h, "include?", mrb_hash_has_key, MRB_ARGS_REQ(1)); /* 15.2.13.4.15 */
|
---|
| 904 | mrb_define_method(mrb, h, "initialize", mrb_hash_init, MRB_ARGS_OPT(1)); /* 15.2.13.4.16 */
|
---|
| 905 | mrb_define_method(mrb, h, "key?", mrb_hash_has_key, MRB_ARGS_REQ(1)); /* 15.2.13.4.18 */
|
---|
| 906 | mrb_define_method(mrb, h, "keys", mrb_hash_keys, MRB_ARGS_NONE()); /* 15.2.13.4.19 */
|
---|
| 907 | mrb_define_method(mrb, h, "length", mrb_hash_size_m, MRB_ARGS_NONE()); /* 15.2.13.4.20 */
|
---|
| 908 | mrb_define_method(mrb, h, "member?", mrb_hash_has_key, MRB_ARGS_REQ(1)); /* 15.2.13.4.21 */
|
---|
| 909 | mrb_define_method(mrb, h, "shift", mrb_hash_shift, MRB_ARGS_NONE()); /* 15.2.13.4.24 */
|
---|
| 910 | mrb_define_method(mrb, h, "dup", mrb_hash_dup, MRB_ARGS_NONE());
|
---|
| 911 | mrb_define_method(mrb, h, "size", mrb_hash_size_m, MRB_ARGS_NONE()); /* 15.2.13.4.25 */
|
---|
| 912 | mrb_define_method(mrb, h, "store", mrb_hash_aset, MRB_ARGS_REQ(2)); /* 15.2.13.4.26 */
|
---|
| 913 | mrb_define_method(mrb, h, "value?", mrb_hash_has_value, MRB_ARGS_REQ(1)); /* 15.2.13.4.27 */
|
---|
| 914 | mrb_define_method(mrb, h, "values", mrb_hash_values, MRB_ARGS_NONE()); /* 15.2.13.4.28 */
|
---|
| 915 |
|
---|
| 916 | mrb_define_method(mrb, h, "to_hash", mrb_hash_to_hash, MRB_ARGS_NONE()); /* 15.2.13.4.29 (x)*/
|
---|
| 917 | }
|
---|