[270] | 1 | /*
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| 2 | ** struct.c - Struct 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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| 7 | #include <string.h>
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[331] | 8 | #include <mruby.h>
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| 9 | #include <mruby/array.h>
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| 10 | #include <mruby/string.h>
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| 11 | #include <mruby/class.h>
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| 12 | #include <mruby/variable.h>
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| 13 | #include <mruby/hash.h>
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| 14 | #include <mruby/range.h>
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[439] | 15 | #include <mruby/proc.h>
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[270] | 16 |
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[439] | 17 | #define RSTRUCT_LEN(st) RARRAY_LEN(st)
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| 18 | #define RSTRUCT_PTR(st) RARRAY_PTR(st)
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[270] | 19 |
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| 20 | static struct RClass *
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| 21 | struct_class(mrb_state *mrb)
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| 22 | {
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| 23 | return mrb_class_get(mrb, "Struct");
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| 24 | }
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| 25 |
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| 26 | static inline mrb_value
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[439] | 27 | struct_ivar_get(mrb_state *mrb, mrb_value cls, mrb_sym id)
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[270] | 28 | {
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[439] | 29 | struct RClass* c = mrb_class_ptr(cls);
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[270] | 30 | struct RClass* sclass = struct_class(mrb);
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| 31 | mrb_value ans;
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| 32 |
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| 33 | for (;;) {
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[439] | 34 | ans = mrb_iv_get(mrb, mrb_obj_value(c), id);
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[270] | 35 | if (!mrb_nil_p(ans)) return ans;
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[439] | 36 | c = c->super;
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| 37 | if (c == sclass || c == 0)
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[270] | 38 | return mrb_nil_value();
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| 39 | }
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| 40 | }
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| 41 |
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| 42 | static mrb_value
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| 43 | struct_s_members(mrb_state *mrb, struct RClass *klass)
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| 44 | {
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| 45 | mrb_value members = struct_ivar_get(mrb, mrb_obj_value(klass), mrb_intern_lit(mrb, "__members__"));
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| 46 |
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| 47 | if (mrb_nil_p(members)) {
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| 48 | mrb_raise(mrb, E_TYPE_ERROR, "uninitialized struct");
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| 49 | }
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| 50 | if (!mrb_array_p(members)) {
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| 51 | mrb_raise(mrb, E_TYPE_ERROR, "corrupted struct");
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| 52 | }
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| 53 | return members;
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| 54 | }
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| 55 |
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| 56 | static mrb_value
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| 57 | struct_members(mrb_state *mrb, mrb_value s)
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| 58 | {
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| 59 | mrb_value members = struct_s_members(mrb, mrb_obj_class(mrb, s));
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| 60 | if (!mrb_array_p(s)) {
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| 61 | mrb_raise(mrb, E_TYPE_ERROR, "corrupted struct");
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| 62 | }
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| 63 | if (RSTRUCT_LEN(s) != RARRAY_LEN(members)) {
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[331] | 64 | if (RSTRUCT_LEN(s) == 0) { /* probably uninitialized */
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| 65 | mrb_ary_resize(mrb, s, RARRAY_LEN(members));
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| 66 | }
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| 67 | else {
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| 68 | mrb_raisef(mrb, E_TYPE_ERROR,
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[439] | 69 | "struct size differs (%i required %i given)",
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| 70 | RARRAY_LEN(members), RSTRUCT_LEN(s));
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[331] | 71 | }
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[270] | 72 | }
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| 73 | return members;
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| 74 | }
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| 75 |
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| 76 | static mrb_value
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| 77 | mrb_struct_s_members_m(mrb_state *mrb, mrb_value klass)
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| 78 | {
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| 79 | mrb_value members, ary;
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| 80 |
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| 81 | members = struct_s_members(mrb, mrb_class_ptr(klass));
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| 82 | ary = mrb_ary_new_capa(mrb, RARRAY_LEN(members));
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| 83 | mrb_ary_replace(mrb, ary, members);
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| 84 | return ary;
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| 85 | }
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| 86 |
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[331] | 87 | static void
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| 88 | mrb_struct_modify(mrb_state *mrb, mrb_value strct)
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| 89 | {
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[439] | 90 | mrb_check_frozen(mrb, mrb_basic_ptr(strct));
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[331] | 91 | mrb_write_barrier(mrb, mrb_basic_ptr(strct));
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| 92 | }
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| 93 |
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[270] | 94 | /* 15.2.18.4.6 */
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| 95 | /*
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| 96 | * call-seq:
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| 97 | * struct.members -> array
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| 98 | *
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| 99 | * Returns an array of strings representing the names of the instance
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| 100 | * variables.
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| 101 | *
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| 102 | * Customer = Struct.new(:name, :address, :zip)
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| 103 | * joe = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345)
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| 104 | * joe.members #=> [:name, :address, :zip]
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| 105 | */
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| 106 |
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| 107 | static mrb_value
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| 108 | mrb_struct_members(mrb_state *mrb, mrb_value obj)
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| 109 | {
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| 110 | return mrb_struct_s_members_m(mrb, mrb_obj_value(mrb_obj_class(mrb, obj)));
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| 111 | }
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| 112 |
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| 113 | static mrb_value
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| 114 | mrb_struct_ref(mrb_state *mrb, mrb_value obj)
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| 115 | {
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[439] | 116 | mrb_int i = mrb_fixnum(mrb_proc_cfunc_env_get(mrb, 0));
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| 117 | mrb_value *ptr = RSTRUCT_PTR(obj);
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| 118 |
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| 119 | if (!ptr) return mrb_nil_value();
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| 120 | return ptr[i];
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[270] | 121 | }
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| 122 |
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| 123 | static mrb_sym
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| 124 | mrb_id_attrset(mrb_state *mrb, mrb_sym id)
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| 125 | {
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[439] | 126 | #define ONSTACK_ALLOC_MAX 32
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| 127 | #define ONSTACK_STRLEN_MAX (ONSTACK_ALLOC_MAX - 1) /* '=' character */
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| 128 |
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[270] | 129 | const char *name;
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| 130 | char *buf;
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| 131 | mrb_int len;
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| 132 | mrb_sym mid;
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[439] | 133 | char onstack[ONSTACK_ALLOC_MAX];
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[270] | 134 |
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[439] | 135 | name = mrb_sym_name_len(mrb, id, &len);
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| 136 | if (len > ONSTACK_STRLEN_MAX) {
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| 137 | buf = (char *)mrb_malloc(mrb, (size_t)len+1);
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| 138 | }
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| 139 | else {
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| 140 | buf = onstack;
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| 141 | }
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[270] | 142 | memcpy(buf, name, (size_t)len);
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| 143 | buf[len] = '=';
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| 144 |
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| 145 | mid = mrb_intern(mrb, buf, len+1);
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[439] | 146 | if (buf != onstack) {
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| 147 | mrb_free(mrb, buf);
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| 148 | }
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[270] | 149 | return mid;
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| 150 | }
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| 151 |
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| 152 | static mrb_value
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[331] | 153 | mrb_struct_set_m(mrb_state *mrb, mrb_value obj)
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[270] | 154 | {
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[439] | 155 | mrb_int i = mrb_fixnum(mrb_proc_cfunc_env_get(mrb, 0));
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| 156 | mrb_value *ptr;
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[331] | 157 | mrb_value val;
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| 158 |
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| 159 | mrb_get_args(mrb, "o", &val);
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[439] | 160 | mrb_struct_modify(mrb, obj);
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| 161 | ptr = RSTRUCT_PTR(obj);
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| 162 | if (ptr == NULL || i >= RSTRUCT_LEN(obj)) {
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| 163 | mrb_ary_set(mrb, obj, i, val);
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| 164 | }
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| 165 | else {
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| 166 | ptr[i] = val;
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| 167 | }
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| 168 | return val;
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[270] | 169 | }
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| 170 |
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| 171 | static void
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| 172 | make_struct_define_accessors(mrb_state *mrb, mrb_value members, struct RClass *c)
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| 173 | {
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| 174 | const mrb_value *ptr_members = RARRAY_PTR(members);
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| 175 | mrb_int i;
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| 176 | mrb_int len = RARRAY_LEN(members);
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| 177 | int ai = mrb_gc_arena_save(mrb);
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| 178 |
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| 179 | for (i=0; i<len; i++) {
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| 180 | mrb_sym id = mrb_symbol(ptr_members[i]);
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[439] | 181 | mrb_method_t m;
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| 182 | mrb_value at = mrb_fixnum_value(i);
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| 183 | struct RProc *aref = mrb_proc_new_cfunc_with_env(mrb, mrb_struct_ref, 1, &at);
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| 184 | struct RProc *aset = mrb_proc_new_cfunc_with_env(mrb, mrb_struct_set_m, 1, &at);
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| 185 | MRB_METHOD_FROM_PROC(m, aref);
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| 186 | mrb_define_method_raw(mrb, c, id, m);
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| 187 | MRB_METHOD_FROM_PROC(m, aset);
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| 188 | mrb_define_method_raw(mrb, c, mrb_id_attrset(mrb, id), m);
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| 189 | mrb_gc_arena_restore(mrb, ai);
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[270] | 190 | }
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| 191 | }
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| 192 |
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| 193 | static mrb_value
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[439] | 194 | make_struct(mrb_state *mrb, mrb_value name, mrb_value members, struct RClass *klass)
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[270] | 195 | {
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| 196 | mrb_value nstr;
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| 197 | mrb_sym id;
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| 198 | struct RClass *c;
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| 199 |
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| 200 | if (mrb_nil_p(name)) {
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| 201 | c = mrb_class_new(mrb, klass);
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| 202 | }
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| 203 | else {
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| 204 | /* old style: should we warn? */
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[439] | 205 | mrb_to_str(mrb, name);
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[270] | 206 | id = mrb_obj_to_sym(mrb, name);
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[439] | 207 | if (!mrb_const_name_p(mrb, RSTRING_PTR(name), RSTRING_LEN(name))) {
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| 208 | mrb_name_error(mrb, id, "identifier %v needs to be constant", name);
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[270] | 209 | }
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| 210 | if (mrb_const_defined_at(mrb, mrb_obj_value(klass), id)) {
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[439] | 211 | mrb_warn(mrb, "redefining constant Struct::%v", name);
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[331] | 212 | mrb_const_remove(mrb, mrb_obj_value(klass), id);
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[270] | 213 | }
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| 214 | c = mrb_define_class_under(mrb, klass, RSTRING_PTR(name), klass);
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| 215 | }
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| 216 | MRB_SET_INSTANCE_TT(c, MRB_TT_ARRAY);
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| 217 | nstr = mrb_obj_value(c);
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| 218 | mrb_iv_set(mrb, nstr, mrb_intern_lit(mrb, "__members__"), members);
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| 219 |
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| 220 | mrb_define_class_method(mrb, c, "new", mrb_instance_new, MRB_ARGS_ANY());
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| 221 | mrb_define_class_method(mrb, c, "[]", mrb_instance_new, MRB_ARGS_ANY());
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| 222 | mrb_define_class_method(mrb, c, "members", mrb_struct_s_members_m, MRB_ARGS_NONE());
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| 223 | /* RSTRUCT(nstr)->basic.c->super = c->c; */
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| 224 | make_struct_define_accessors(mrb, members, c);
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| 225 | return nstr;
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| 226 | }
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| 227 |
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| 228 | /* 15.2.18.3.1 */
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| 229 | /*
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| 230 | * call-seq:
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| 231 | * Struct.new( [aString] [, aSym]+> ) -> StructClass
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| 232 | * StructClass.new(arg, ...) -> obj
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| 233 | * StructClass[arg, ...] -> obj
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| 234 | *
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| 235 | * Creates a new class, named by <i>aString</i>, containing accessor
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| 236 | * methods for the given symbols. If the name <i>aString</i> is
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| 237 | * omitted, an anonymous structure class will be created. Otherwise,
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| 238 | * the name of this struct will appear as a constant in class
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| 239 | * <code>Struct</code>, so it must be unique for all
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| 240 | * <code>Struct</code>s in the system and should start with a capital
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| 241 | * letter. Assigning a structure class to a constant effectively gives
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| 242 | * the class the name of the constant.
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| 243 | *
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| 244 | * <code>Struct::new</code> returns a new <code>Class</code> object,
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| 245 | * which can then be used to create specific instances of the new
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| 246 | * structure. The number of actual parameters must be
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| 247 | * less than or equal to the number of attributes defined for this
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| 248 | * class; unset parameters default to <code>nil</code>. Passing too many
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| 249 | * parameters will raise an <code>ArgumentError</code>.
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| 250 | *
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| 251 | * The remaining methods listed in this section (class and instance)
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| 252 | * are defined for this generated class.
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| 253 | *
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| 254 | * # Create a structure with a name in Struct
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| 255 | * Struct.new("Customer", :name, :address) #=> Struct::Customer
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| 256 | * Struct::Customer.new("Dave", "123 Main") #=> #<struct Struct::Customer name="Dave", address="123 Main">
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| 257 | *
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| 258 | * # Create a structure named by its constant
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| 259 | * Customer = Struct.new(:name, :address) #=> Customer
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| 260 | * Customer.new("Dave", "123 Main") #=> #<struct Customer name="Dave", address="123 Main">
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| 261 | */
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| 262 | static mrb_value
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| 263 | mrb_struct_s_def(mrb_state *mrb, mrb_value klass)
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| 264 | {
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| 265 | mrb_value name, rest;
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| 266 | mrb_value *pargv;
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| 267 | mrb_int argcnt;
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| 268 | mrb_int i;
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| 269 | mrb_value b, st;
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| 270 | mrb_sym id;
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| 271 | mrb_value *argv;
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| 272 | mrb_int argc;
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| 273 |
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| 274 | name = mrb_nil_value();
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| 275 | mrb_get_args(mrb, "*&", &argv, &argc, &b);
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| 276 | if (argc == 0) { /* special case to avoid crash */
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[439] | 277 | mrb_argnum_error(mrb, argc, 1, -1);
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[270] | 278 | }
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| 279 | else {
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[439] | 280 | pargv = argv;
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| 281 | argcnt = argc;
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| 282 | if (argc > 0) {
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| 283 | name = argv[0];
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| 284 | if (mrb_symbol_p(name)) {
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| 285 | /* 1stArgument:symbol -> name=nil rest=argv[0..n] */
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| 286 | name = mrb_nil_value();
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| 287 | }
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| 288 | else {
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| 289 | pargv++;
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| 290 | argcnt--;
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| 291 | }
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[270] | 292 | }
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[331] | 293 | rest = mrb_ary_new_from_values(mrb, argcnt, pargv);
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[439] | 294 | for (i=0; i<argcnt; i++) {
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[270] | 295 | id = mrb_obj_to_sym(mrb, RARRAY_PTR(rest)[i]);
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| 296 | mrb_ary_set(mrb, rest, i, mrb_symbol_value(id));
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| 297 | }
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[439] | 298 | st = make_struct(mrb, name, rest, mrb_class_ptr(klass));
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| 299 | if (!mrb_nil_p(b)) {
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| 300 | mrb_yield_with_class(mrb, b, 1, &st, st, mrb_class_ptr(st));
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| 301 | }
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| 302 |
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| 303 | return st;
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[270] | 304 | }
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[439] | 305 | /* not reached */
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| 306 | return mrb_nil_value();
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[270] | 307 | }
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| 308 |
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| 309 | static mrb_int
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| 310 | num_members(mrb_state *mrb, struct RClass *klass)
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| 311 | {
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| 312 | mrb_value members;
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| 313 |
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| 314 | members = struct_ivar_get(mrb, mrb_obj_value(klass), mrb_intern_lit(mrb, "__members__"));
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| 315 | if (!mrb_array_p(members)) {
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| 316 | mrb_raise(mrb, E_TYPE_ERROR, "broken members");
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| 317 | }
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| 318 | return RARRAY_LEN(members);
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| 319 | }
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| 320 |
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| 321 | /* 15.2.18.4.8 */
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| 322 | /*
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| 323 | */
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| 324 | static mrb_value
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| 325 | mrb_struct_initialize_withArg(mrb_state *mrb, mrb_int argc, mrb_value *argv, mrb_value self)
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| 326 | {
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| 327 | struct RClass *klass = mrb_obj_class(mrb, self);
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| 328 | mrb_int i, n;
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| 329 |
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| 330 | n = num_members(mrb, klass);
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| 331 | if (n < argc) {
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| 332 | mrb_raise(mrb, E_ARGUMENT_ERROR, "struct size differs");
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| 333 | }
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| 334 |
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| 335 | for (i = 0; i < argc; i++) {
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| 336 | mrb_ary_set(mrb, self, i, argv[i]);
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| 337 | }
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| 338 | for (i = argc; i < n; i++) {
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| 339 | mrb_ary_set(mrb, self, i, mrb_nil_value());
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| 340 | }
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| 341 | return self;
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| 342 | }
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| 343 |
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| 344 | static mrb_value
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| 345 | mrb_struct_initialize(mrb_state *mrb, mrb_value self)
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| 346 | {
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| 347 | mrb_value *argv;
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| 348 | mrb_int argc;
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| 349 |
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[439] | 350 | mrb_get_args(mrb, "*!", &argv, &argc);
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[270] | 351 | return mrb_struct_initialize_withArg(mrb, argc, argv, self);
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| 352 | }
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| 353 |
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| 354 | /* 15.2.18.4.9 */
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| 355 | /* :nodoc: */
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| 356 | static mrb_value
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| 357 | mrb_struct_init_copy(mrb_state *mrb, mrb_value copy)
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| 358 | {
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| 359 | mrb_value s;
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| 360 |
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| 361 | mrb_get_args(mrb, "o", &s);
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| 362 |
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| 363 | if (mrb_obj_equal(mrb, copy, s)) return copy;
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| 364 | if (!mrb_obj_is_instance_of(mrb, s, mrb_obj_class(mrb, copy))) {
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| 365 | mrb_raise(mrb, E_TYPE_ERROR, "wrong argument class");
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| 366 | }
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| 367 | if (!mrb_array_p(s)) {
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| 368 | mrb_raise(mrb, E_TYPE_ERROR, "corrupted struct");
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| 369 | }
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[331] | 370 | mrb_ary_replace(mrb, copy, s);
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[270] | 371 | return copy;
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| 372 | }
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| 373 |
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| 374 | static mrb_value
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[331] | 375 | struct_aref_sym(mrb_state *mrb, mrb_value obj, mrb_sym id)
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[270] | 376 | {
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[331] | 377 | mrb_value members, *ptr;
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[270] | 378 | const mrb_value *ptr_members;
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| 379 | mrb_int i, len;
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| 380 |
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[331] | 381 | members = struct_members(mrb, obj);
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[270] | 382 | ptr_members = RARRAY_PTR(members);
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| 383 | len = RARRAY_LEN(members);
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[331] | 384 | ptr = RSTRUCT_PTR(obj);
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[270] | 385 | for (i=0; i<len; i++) {
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[331] | 386 | mrb_value slot = ptr_members[i];
|
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| 387 | if (mrb_symbol_p(slot) && mrb_symbol(slot) == id) {
|
---|
[270] | 388 | return ptr[i];
|
---|
| 389 | }
|
---|
| 390 | }
|
---|
[439] | 391 | mrb_name_error(mrb, id, "no member '%n' in struct", id);
|
---|
[270] | 392 | return mrb_nil_value(); /* not reached */
|
---|
| 393 | }
|
---|
| 394 |
|
---|
| 395 | static mrb_value
|
---|
| 396 | struct_aref_int(mrb_state *mrb, mrb_value s, mrb_int i)
|
---|
| 397 | {
|
---|
[439] | 398 | mrb_int idx = i < 0 ? RSTRUCT_LEN(s) + i : i;
|
---|
| 399 |
|
---|
| 400 | if (idx < 0)
|
---|
[270] | 401 | mrb_raisef(mrb, E_INDEX_ERROR,
|
---|
[439] | 402 | "offset %i too small for struct(size:%i)", i, RSTRUCT_LEN(s));
|
---|
| 403 | if (RSTRUCT_LEN(s) <= idx)
|
---|
| 404 | mrb_raisef(mrb, E_INDEX_ERROR,
|
---|
| 405 | "offset %i too large for struct(size:%i)", i, RSTRUCT_LEN(s));
|
---|
| 406 | return RSTRUCT_PTR(s)[idx];
|
---|
[270] | 407 | }
|
---|
| 408 |
|
---|
| 409 | /* 15.2.18.4.2 */
|
---|
| 410 | /*
|
---|
| 411 | * call-seq:
|
---|
| 412 | * struct[symbol] -> anObject
|
---|
| 413 | * struct[fixnum] -> anObject
|
---|
| 414 | *
|
---|
| 415 | * Attribute Reference---Returns the value of the instance variable
|
---|
| 416 | * named by <i>symbol</i>, or indexed (0..length-1) by
|
---|
| 417 | * <i>fixnum</i>. Will raise <code>NameError</code> if the named
|
---|
| 418 | * variable does not exist, or <code>IndexError</code> if the index is
|
---|
| 419 | * out of range.
|
---|
| 420 | *
|
---|
| 421 | * Customer = Struct.new(:name, :address, :zip)
|
---|
| 422 | * joe = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345)
|
---|
| 423 | *
|
---|
| 424 | * joe["name"] #=> "Joe Smith"
|
---|
| 425 | * joe[:name] #=> "Joe Smith"
|
---|
| 426 | * joe[0] #=> "Joe Smith"
|
---|
| 427 | */
|
---|
| 428 | static mrb_value
|
---|
| 429 | mrb_struct_aref(mrb_state *mrb, mrb_value s)
|
---|
| 430 | {
|
---|
| 431 | mrb_value idx;
|
---|
| 432 |
|
---|
| 433 | mrb_get_args(mrb, "o", &idx);
|
---|
| 434 | if (mrb_string_p(idx)) {
|
---|
| 435 | mrb_value sym = mrb_check_intern_str(mrb, idx);
|
---|
| 436 |
|
---|
| 437 | if (mrb_nil_p(sym)) {
|
---|
[439] | 438 | mrb_name_error(mrb, mrb_intern_str(mrb, idx), "no member '%v' in struct", idx);
|
---|
[270] | 439 | }
|
---|
| 440 | idx = sym;
|
---|
| 441 | }
|
---|
| 442 | if (mrb_symbol_p(idx)) {
|
---|
| 443 | return struct_aref_sym(mrb, s, mrb_symbol(idx));
|
---|
| 444 | }
|
---|
| 445 | return struct_aref_int(mrb, s, mrb_int(mrb, idx));
|
---|
| 446 | }
|
---|
| 447 |
|
---|
| 448 | static mrb_value
|
---|
| 449 | mrb_struct_aset_sym(mrb_state *mrb, mrb_value s, mrb_sym id, mrb_value val)
|
---|
| 450 | {
|
---|
| 451 | mrb_value members, *ptr;
|
---|
| 452 | const mrb_value *ptr_members;
|
---|
| 453 | mrb_int i, len;
|
---|
| 454 |
|
---|
| 455 | members = struct_members(mrb, s);
|
---|
| 456 | len = RARRAY_LEN(members);
|
---|
| 457 | ptr = RSTRUCT_PTR(s);
|
---|
| 458 | ptr_members = RARRAY_PTR(members);
|
---|
| 459 | for (i=0; i<len; i++) {
|
---|
| 460 | if (mrb_symbol(ptr_members[i]) == id) {
|
---|
[331] | 461 | mrb_struct_modify(mrb, s);
|
---|
[270] | 462 | ptr[i] = val;
|
---|
| 463 | return val;
|
---|
| 464 | }
|
---|
| 465 | }
|
---|
[439] | 466 | mrb_name_error(mrb, id, "no member '%n' in struct", id);
|
---|
[270] | 467 | return val; /* not reach */
|
---|
| 468 | }
|
---|
| 469 |
|
---|
| 470 | /* 15.2.18.4.3 */
|
---|
| 471 | /*
|
---|
| 472 | * call-seq:
|
---|
| 473 | * struct[symbol] = obj -> obj
|
---|
| 474 | * struct[fixnum] = obj -> obj
|
---|
| 475 | *
|
---|
| 476 | * Attribute Assignment---Assigns to the instance variable named by
|
---|
| 477 | * <i>symbol</i> or <i>fixnum</i> the value <i>obj</i> and
|
---|
| 478 | * returns it. Will raise a <code>NameError</code> if the named
|
---|
| 479 | * variable does not exist, or an <code>IndexError</code> if the index
|
---|
| 480 | * is out of range.
|
---|
| 481 | *
|
---|
| 482 | * Customer = Struct.new(:name, :address, :zip)
|
---|
| 483 | * joe = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345)
|
---|
| 484 | *
|
---|
| 485 | * joe["name"] = "Luke"
|
---|
| 486 | * joe[:zip] = "90210"
|
---|
| 487 | *
|
---|
| 488 | * joe.name #=> "Luke"
|
---|
| 489 | * joe.zip #=> "90210"
|
---|
| 490 | */
|
---|
| 491 |
|
---|
| 492 | static mrb_value
|
---|
| 493 | mrb_struct_aset(mrb_state *mrb, mrb_value s)
|
---|
| 494 | {
|
---|
| 495 | mrb_int i;
|
---|
| 496 | mrb_value idx;
|
---|
| 497 | mrb_value val;
|
---|
| 498 |
|
---|
| 499 | mrb_get_args(mrb, "oo", &idx, &val);
|
---|
| 500 |
|
---|
| 501 | if (mrb_string_p(idx)) {
|
---|
| 502 | mrb_value sym = mrb_check_intern_str(mrb, idx);
|
---|
| 503 |
|
---|
| 504 | if (mrb_nil_p(sym)) {
|
---|
[439] | 505 | mrb_name_error(mrb, mrb_intern_str(mrb, idx), "no member '%v' in struct", idx);
|
---|
[270] | 506 | }
|
---|
| 507 | idx = sym;
|
---|
| 508 | }
|
---|
| 509 | if (mrb_symbol_p(idx)) {
|
---|
| 510 | return mrb_struct_aset_sym(mrb, s, mrb_symbol(idx), val);
|
---|
| 511 | }
|
---|
| 512 |
|
---|
| 513 | i = mrb_int(mrb, idx);
|
---|
| 514 | if (i < 0) i = RSTRUCT_LEN(s) + i;
|
---|
| 515 | if (i < 0) {
|
---|
| 516 | mrb_raisef(mrb, E_INDEX_ERROR,
|
---|
[439] | 517 | "offset %i too small for struct(size:%i)", i, RSTRUCT_LEN(s));
|
---|
[270] | 518 | }
|
---|
| 519 | if (RSTRUCT_LEN(s) <= i) {
|
---|
| 520 | mrb_raisef(mrb, E_INDEX_ERROR,
|
---|
[439] | 521 | "offset %i too large for struct(size:%i)", i, RSTRUCT_LEN(s));
|
---|
[270] | 522 | }
|
---|
[331] | 523 | mrb_struct_modify(mrb, s);
|
---|
[270] | 524 | return RSTRUCT_PTR(s)[i] = val;
|
---|
| 525 | }
|
---|
| 526 |
|
---|
| 527 | /* 15.2.18.4.1 */
|
---|
| 528 | /*
|
---|
| 529 | * call-seq:
|
---|
| 530 | * struct == other_struct -> true or false
|
---|
| 531 | *
|
---|
| 532 | * Equality---Returns <code>true</code> if <i>other_struct</i> is
|
---|
| 533 | * equal to this one: they must be of the same class as generated by
|
---|
| 534 | * <code>Struct::new</code>, and the values of all instance variables
|
---|
| 535 | * must be equal (according to <code>Object#==</code>).
|
---|
| 536 | *
|
---|
| 537 | * Customer = Struct.new(:name, :address, :zip)
|
---|
| 538 | * joe = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345)
|
---|
| 539 | * joejr = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345)
|
---|
| 540 | * jane = Customer.new("Jane Doe", "456 Elm, Anytown NC", 12345)
|
---|
| 541 | * joe == joejr #=> true
|
---|
| 542 | * joe == jane #=> false
|
---|
| 543 | */
|
---|
| 544 |
|
---|
| 545 | static mrb_value
|
---|
| 546 | mrb_struct_equal(mrb_state *mrb, mrb_value s)
|
---|
| 547 | {
|
---|
| 548 | mrb_value s2;
|
---|
| 549 | mrb_value *ptr, *ptr2;
|
---|
| 550 | mrb_int i, len;
|
---|
| 551 |
|
---|
| 552 | mrb_get_args(mrb, "o", &s2);
|
---|
| 553 | if (mrb_obj_equal(mrb, s, s2)) {
|
---|
| 554 | return mrb_true_value();
|
---|
| 555 | }
|
---|
| 556 | if (mrb_obj_class(mrb, s) != mrb_obj_class(mrb, s2)) {
|
---|
| 557 | return mrb_false_value();
|
---|
| 558 | }
|
---|
| 559 | if (RSTRUCT_LEN(s) != RSTRUCT_LEN(s2)) {
|
---|
| 560 | mrb_bug(mrb, "inconsistent struct"); /* should never happen */
|
---|
| 561 | }
|
---|
| 562 | ptr = RSTRUCT_PTR(s);
|
---|
| 563 | ptr2 = RSTRUCT_PTR(s2);
|
---|
| 564 | len = RSTRUCT_LEN(s);
|
---|
| 565 | for (i=0; i<len; i++) {
|
---|
| 566 | if (!mrb_equal(mrb, ptr[i], ptr2[i])) {
|
---|
| 567 | return mrb_false_value();
|
---|
| 568 | }
|
---|
| 569 | }
|
---|
| 570 |
|
---|
| 571 | return mrb_true_value();
|
---|
| 572 | }
|
---|
| 573 |
|
---|
| 574 | /* 15.2.18.4.12(x) */
|
---|
| 575 | /*
|
---|
| 576 | * code-seq:
|
---|
| 577 | * struct.eql?(other) -> true or false
|
---|
| 578 | *
|
---|
| 579 | * Two structures are equal if they are the same object, or if all their
|
---|
| 580 | * fields are equal (using <code>eql?</code>).
|
---|
| 581 | */
|
---|
| 582 | static mrb_value
|
---|
| 583 | mrb_struct_eql(mrb_state *mrb, mrb_value s)
|
---|
| 584 | {
|
---|
| 585 | mrb_value s2;
|
---|
| 586 | mrb_value *ptr, *ptr2;
|
---|
| 587 | mrb_int i, len;
|
---|
| 588 |
|
---|
| 589 | mrb_get_args(mrb, "o", &s2);
|
---|
| 590 | if (mrb_obj_equal(mrb, s, s2)) {
|
---|
| 591 | return mrb_true_value();
|
---|
| 592 | }
|
---|
| 593 | if (mrb_obj_class(mrb, s) != mrb_obj_class(mrb, s2)) {
|
---|
| 594 | return mrb_false_value();
|
---|
| 595 | }
|
---|
| 596 | if (RSTRUCT_LEN(s) != RSTRUCT_LEN(s2)) {
|
---|
| 597 | mrb_bug(mrb, "inconsistent struct"); /* should never happen */
|
---|
| 598 | }
|
---|
| 599 | ptr = RSTRUCT_PTR(s);
|
---|
| 600 | ptr2 = RSTRUCT_PTR(s2);
|
---|
| 601 | len = RSTRUCT_LEN(s);
|
---|
| 602 | for (i=0; i<len; i++) {
|
---|
| 603 | if (!mrb_eql(mrb, ptr[i], ptr2[i])) {
|
---|
| 604 | return mrb_false_value();
|
---|
| 605 | }
|
---|
| 606 | }
|
---|
| 607 |
|
---|
| 608 | return mrb_true_value();
|
---|
| 609 | }
|
---|
| 610 |
|
---|
| 611 | /*
|
---|
| 612 | * call-seq:
|
---|
| 613 | * struct.length -> Fixnum
|
---|
| 614 | * struct.size -> Fixnum
|
---|
| 615 | *
|
---|
| 616 | * Returns number of struct members.
|
---|
| 617 | */
|
---|
| 618 | static mrb_value
|
---|
| 619 | mrb_struct_len(mrb_state *mrb, mrb_value self)
|
---|
| 620 | {
|
---|
| 621 | return mrb_fixnum_value(RSTRUCT_LEN(self));
|
---|
| 622 | }
|
---|
| 623 |
|
---|
| 624 | /*
|
---|
| 625 | * call-seq:
|
---|
| 626 | * struct.to_a -> array
|
---|
| 627 | * struct.values -> array
|
---|
| 628 | *
|
---|
| 629 | * Create an array from struct values.
|
---|
| 630 | */
|
---|
| 631 | static mrb_value
|
---|
| 632 | mrb_struct_to_a(mrb_state *mrb, mrb_value self)
|
---|
| 633 | {
|
---|
| 634 | return mrb_ary_new_from_values(mrb, RSTRUCT_LEN(self), RSTRUCT_PTR(self));
|
---|
| 635 | }
|
---|
| 636 |
|
---|
| 637 | /*
|
---|
| 638 | * call-seq:
|
---|
| 639 | * struct.to_h -> hash
|
---|
| 640 | *
|
---|
| 641 | * Create a hash from member names and struct values.
|
---|
| 642 | */
|
---|
| 643 | static mrb_value
|
---|
| 644 | mrb_struct_to_h(mrb_state *mrb, mrb_value self)
|
---|
| 645 | {
|
---|
| 646 | mrb_value members, ret;
|
---|
| 647 | mrb_int i;
|
---|
| 648 |
|
---|
[331] | 649 | members = struct_members(mrb, self);
|
---|
[270] | 650 | ret = mrb_hash_new_capa(mrb, RARRAY_LEN(members));
|
---|
| 651 |
|
---|
| 652 | for (i = 0; i < RARRAY_LEN(members); ++i) {
|
---|
| 653 | mrb_hash_set(mrb, ret, RARRAY_PTR(members)[i], RSTRUCT_PTR(self)[i]);
|
---|
| 654 | }
|
---|
| 655 |
|
---|
| 656 | return ret;
|
---|
| 657 | }
|
---|
| 658 |
|
---|
| 659 | static mrb_value
|
---|
| 660 | mrb_struct_values_at(mrb_state *mrb, mrb_value self)
|
---|
| 661 | {
|
---|
| 662 | mrb_int argc;
|
---|
| 663 | mrb_value *argv;
|
---|
| 664 |
|
---|
| 665 | mrb_get_args(mrb, "*", &argv, &argc);
|
---|
| 666 |
|
---|
| 667 | return mrb_get_values_at(mrb, self, RSTRUCT_LEN(self), argc, argv, struct_aref_int);
|
---|
| 668 | }
|
---|
| 669 |
|
---|
| 670 | /*
|
---|
| 671 | * A <code>Struct</code> is a convenient way to bundle a number of
|
---|
| 672 | * attributes together, using accessor methods, without having to write
|
---|
| 673 | * an explicit class.
|
---|
| 674 | *
|
---|
| 675 | * The <code>Struct</code> class is a generator of specific classes,
|
---|
| 676 | * each one of which is defined to hold a set of variables and their
|
---|
| 677 | * accessors. In these examples, we'll call the generated class
|
---|
| 678 | * "<i>Customer</i>Class," and we'll show an example instance of that
|
---|
| 679 | * class as "<i>Customer</i>Inst."
|
---|
| 680 | *
|
---|
| 681 | * In the descriptions that follow, the parameter <i>symbol</i> refers
|
---|
| 682 | * to a symbol, which is either a quoted string or a
|
---|
| 683 | * <code>Symbol</code> (such as <code>:name</code>).
|
---|
| 684 | */
|
---|
| 685 | void
|
---|
| 686 | mrb_mruby_struct_gem_init(mrb_state* mrb)
|
---|
| 687 | {
|
---|
| 688 | struct RClass *st;
|
---|
| 689 | st = mrb_define_class(mrb, "Struct", mrb->object_class);
|
---|
[331] | 690 | MRB_SET_INSTANCE_TT(st, MRB_TT_ARRAY);
|
---|
[270] | 691 |
|
---|
| 692 | mrb_define_class_method(mrb, st, "new", mrb_struct_s_def, MRB_ARGS_ANY()); /* 15.2.18.3.1 */
|
---|
| 693 |
|
---|
| 694 | mrb_define_method(mrb, st, "==", mrb_struct_equal, MRB_ARGS_REQ(1)); /* 15.2.18.4.1 */
|
---|
| 695 | mrb_define_method(mrb, st, "[]", mrb_struct_aref, MRB_ARGS_REQ(1)); /* 15.2.18.4.2 */
|
---|
| 696 | mrb_define_method(mrb, st, "[]=", mrb_struct_aset, MRB_ARGS_REQ(2)); /* 15.2.18.4.3 */
|
---|
| 697 | mrb_define_method(mrb, st, "members", mrb_struct_members, MRB_ARGS_NONE()); /* 15.2.18.4.6 */
|
---|
| 698 | mrb_define_method(mrb, st, "initialize", mrb_struct_initialize, MRB_ARGS_ANY()); /* 15.2.18.4.8 */
|
---|
| 699 | mrb_define_method(mrb, st, "initialize_copy", mrb_struct_init_copy, MRB_ARGS_REQ(1)); /* 15.2.18.4.9 */
|
---|
| 700 | mrb_define_method(mrb, st, "eql?", mrb_struct_eql, MRB_ARGS_REQ(1)); /* 15.2.18.4.12(x) */
|
---|
| 701 |
|
---|
| 702 | mrb_define_method(mrb, st, "size", mrb_struct_len, MRB_ARGS_NONE());
|
---|
| 703 | mrb_define_method(mrb, st, "length", mrb_struct_len, MRB_ARGS_NONE());
|
---|
| 704 | mrb_define_method(mrb, st, "to_a", mrb_struct_to_a, MRB_ARGS_NONE());
|
---|
| 705 | mrb_define_method(mrb, st, "values", mrb_struct_to_a, MRB_ARGS_NONE());
|
---|
| 706 | mrb_define_method(mrb, st, "to_h", mrb_struct_to_h, MRB_ARGS_NONE());
|
---|
[331] | 707 | mrb_define_method(mrb, st, "values_at", mrb_struct_values_at, MRB_ARGS_ANY());
|
---|
[270] | 708 | }
|
---|
| 709 |
|
---|
| 710 | void
|
---|
| 711 | mrb_mruby_struct_gem_final(mrb_state* mrb)
|
---|
| 712 | {
|
---|
| 713 | }
|
---|