static mrb_value
mrb_ary_aget(mrb_state *mrb, mrb_value self)
{
struct RArray *a = mrb_ary_ptr(self);
mrb_int i, len;
mrb_value index;
if (mrb_get_args(mrb, "o|i", &index, &len) == 1) {
switch (mrb_type(index)) {
/* a[n..m] */
case MRB_TT_RANGE:
if (mrb_range_beg_len(mrb, index, &i, &len, a->len)) {
return ary_subseq(mrb, a, i, len);
}
else {
return mrb_nil_value();
}
case MRB_TT_FIXNUM:
return mrb_ary_ref(mrb, self, mrb_fixnum(index));
default:
return mrb_ary_ref(mrb, self, aget_index(mrb, index));
}
}
i = aget_index(mrb, index);
if (i < 0) i += a->len;
if (i < 0 || a->len < i) return mrb_nil_value();
if (len < 0) return mrb_nil_value();
if (a->len == i) return mrb_ary_new(mrb);
if (len > a->len - i) len = a->len - i;
return ary_subseq(mrb, a, i, len);
}
static mrb_value
mrb_ary_aset(mrb_state *mrb, mrb_value self)
{
mrb_value v1, v2, v3;
mrb_int i, len;
if (mrb_get_args(mrb, "oo|o", &v1, &v2, &v3) == 2) {
switch (mrb_type(v1)) {
/* a[n..m] = v */
case MRB_TT_RANGE:
if (mrb_range_beg_len(mrb, v1, &i, &len, RARRAY_LEN(self))) {
mrb_ary_splice(mrb, self, i, len, v2);
}
break;
/* a[n] = v */
case MRB_TT_FIXNUM:
mrb_ary_set(mrb, self, mrb_fixnum(v1), v2);
break;
default:
mrb_ary_set(mrb, self, aget_index(mrb, v1), v2);
break;
}
return v2;
}
/* a[n,m] = v */
mrb_ary_splice(mrb, self, aget_index(mrb, v1), aget_index(mrb, v2), v3);
return v3;
}
static mrb_value
mrb_ary_aset(mrb_state *mrb, mrb_value self)
{
mrb_value v1, v2, v3;
mrb_int i, len;
mrb_ary_modify(mrb, mrb_ary_ptr(self));
if (mrb_get_args(mrb, "oo|o", &v1, &v2, &v3) == 2) {
/* a[n..m] = v */
switch (mrb_range_beg_len(mrb, v1, &i, &len, RARRAY_LEN(self), FALSE)) {
case 0: /* not range */
mrb_ary_set(mrb, self, aget_index(mrb, v1), v2);
break;
case 1: /* range */
mrb_ary_splice(mrb, self, i, len, v2);
break;
case 2: /* out of range */
mrb_raisef(mrb, E_RANGE_ERROR, "%S out of range", v1);
break;
}
return v2;
}
/* a[n,m] = v */
mrb_ary_splice(mrb, self, aget_index(mrb, v1), aget_index(mrb, v2), v3);
return v3;
}
