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/*
** struct.c - Struct class
**
** See Copyright Notice in mruby.h
*/
#include "mruby.h"
#ifdef ENABLE_STRUCT
#include <string.h>
#include "error.h"
#include "mruby/struct.h"
#include "mruby/array.h"
#include <stdarg.h>
//#include "defines.h"
#ifdef ENABLE_REGEXP
#include "encoding.h"
#endif
#include "mruby/string.h"
#include "mruby/class.h"
#include "mruby/variable.h"
//#include "defines.h"
#define mrb_long2int(n) ((int)(n))
static struct RClass *
struct_class(mrb_state *mrb)
{
return mrb_class_get(mrb, "Struct");
}
static inline mrb_value
struct_ivar_get(mrb_state *mrb, mrb_value c, mrb_sym id)
{
struct RClass* kclass;
struct RClass* sclass = struct_class(mrb);
mrb_value ans;
for (;;) {
ans = mrb_iv_get(mrb, c, id);
if (!mrb_nil_p(ans)) return ans;
kclass = RCLASS_SUPER(c);
if (kclass == 0 || kclass == sclass)
return mrb_nil_value();
c = mrb_obj_value(kclass);
}
}
mrb_value
mrb_struct_iv_get(mrb_state *mrb, mrb_value c, const char *name)
{
return struct_ivar_get(mrb, c, mrb_intern(mrb, name));
}
mrb_value
mrb_struct_s_members(mrb_state *mrb, mrb_value klass)
{
mrb_value members = struct_ivar_get(mrb, klass, mrb_intern(mrb, "__members__"));
if (mrb_nil_p(members)) {
mrb_raise(mrb, E_TYPE_ERROR, "uninitialized struct");
}
if (mrb_type(members) != MRB_TT_ARRAY) {
mrb_raise(mrb, E_TYPE_ERROR, "corrupted struct");
}
return members;
}
mrb_value
mrb_struct_members(mrb_state *mrb, mrb_value s)
{
mrb_value members = mrb_struct_s_members(mrb, mrb_obj_value(mrb_obj_class(mrb, s)));
if (mrb_type(s) == MRB_TT_STRUCT) {
if (RSTRUCT_LEN(s) != RARRAY_LEN(members)) {
mrb_raise(mrb, E_TYPE_ERROR, "struct size differs (%ld required %ld given)",
RARRAY_LEN(members), RSTRUCT_LEN(s));
}
}
return members;
}
static mrb_value
mrb_struct_s_members_m(mrb_state *mrb, mrb_value klass)
{
mrb_value members, ary;
mrb_value *p, *pend;
members = mrb_struct_s_members(mrb, klass);
ary = mrb_ary_new_capa(mrb, RARRAY_LEN(members));
p = RARRAY_PTR(members); pend = p + RARRAY_LEN(members);
while (p < pend) {
mrb_ary_push(mrb, ary, *p);
p++;
}
return ary;
}
/* 15.2.18.4.6 */
/*
* call-seq:
* struct.members -> array
*
* Returns an array of strings representing the names of the instance
* variables.
*
* Customer = Struct.new(:name, :address, :zip)
* joe = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345)
* joe.members #=> [:name, :address, :zip]
*/
static mrb_value
mrb_struct_members_m(mrb_state *mrb, mrb_value obj)
{
return mrb_struct_s_members_m(mrb, mrb_obj_value(mrb_obj_class(mrb, obj)));
}
mrb_value
mrb_struct_getmember(mrb_state *mrb, mrb_value obj, mrb_sym id)
{
mrb_value members, slot, *ptr, *ptr_members;
long i, len;
ptr = RSTRUCT_PTR(obj);
members = mrb_struct_members(mrb, obj);
ptr_members = RARRAY_PTR(members);
slot = mrb_symbol_value(id);
len = RARRAY_LEN(members);
for (i=0; i<len; i++) {
if (mrb_obj_equal(mrb, ptr_members[i], slot)) {
return ptr[i];
}
}
mrb_name_error(mrb, id, "%s is not struct member", mrb_sym2name(mrb, id));
return mrb_nil_value(); /* not reached */
}
static mrb_value
mrb_struct_ref(mrb_state *mrb, mrb_value obj)
{
return mrb_struct_getmember(mrb, obj, mrb->ci->mid);
}
static mrb_value mrb_struct_ref0(mrb_state* mrb, mrb_value obj) {return RSTRUCT_PTR(obj)[0];}
static mrb_value mrb_struct_ref1(mrb_state* mrb, mrb_value obj) {return RSTRUCT_PTR(obj)[1];}
static mrb_value mrb_struct_ref2(mrb_state* mrb, mrb_value obj) {return RSTRUCT_PTR(obj)[2];}
static mrb_value mrb_struct_ref3(mrb_state* mrb, mrb_value obj) {return RSTRUCT_PTR(obj)[3];}
static mrb_value mrb_struct_ref4(mrb_state* mrb, mrb_value obj) {return RSTRUCT_PTR(obj)[4];}
static mrb_value mrb_struct_ref5(mrb_state* mrb, mrb_value obj) {return RSTRUCT_PTR(obj)[5];}
static mrb_value mrb_struct_ref6(mrb_state* mrb, mrb_value obj) {return RSTRUCT_PTR(obj)[6];}
static mrb_value mrb_struct_ref7(mrb_state* mrb, mrb_value obj) {return RSTRUCT_PTR(obj)[7];}
static mrb_value mrb_struct_ref8(mrb_state* mrb, mrb_value obj) {return RSTRUCT_PTR(obj)[8];}
static mrb_value mrb_struct_ref9(mrb_state* mrb, mrb_value obj) {return RSTRUCT_PTR(obj)[9];}
#define numberof(array) (int)(sizeof(array) / sizeof((array)[0]))
#define N_REF_FUNC numberof(ref_func)
static mrb_value (*const ref_func[])(mrb_state*, mrb_value) = {
mrb_struct_ref0,
mrb_struct_ref1,
mrb_struct_ref2,
mrb_struct_ref3,
mrb_struct_ref4,
mrb_struct_ref5,
mrb_struct_ref6,
mrb_struct_ref7,
mrb_struct_ref8,
mrb_struct_ref9,
};
static void
mrb_struct_modify(mrb_value s)
{
//if (OBJ_FROZEN(s)) mrb_error_frozen("Struct");
}
mrb_sym
mrb_id_attrset(mrb_state *mrb, mrb_sym id)
{
const char *name;
char *buf;
int len;
mrb_sym mid;
name = mrb_sym2name_len(mrb, id, &len);
buf = (char *)mrb_malloc(mrb, len+2);
memcpy(buf, name, len);
buf[len] = '=';
buf[len+1] = '\0';
mid = mrb_intern2(mrb, buf, len+1);
mrb_free(mrb, buf);
return mid;
}
static mrb_value
mrb_struct_set(mrb_state *mrb, mrb_value obj, mrb_value val)
{
const char *name;
int i, len;
mrb_sym mid;
mrb_value members, slot, *ptr, *ptr_members;
/* get base id */
name = mrb_sym2name_len(mrb, mrb->ci->mid, &len);
mid = mrb_intern2(mrb, name, len-1); /* omit last "=" */
members = mrb_struct_members(mrb, obj);
ptr_members = RARRAY_PTR(members);
len = RARRAY_LEN(members);
mrb_struct_modify(obj);
ptr = RSTRUCT_PTR(obj);
for (i=0; i<len; i++) {
slot = ptr_members[i];
if (SYM2ID(slot) == mid) {
return ptr[i] = val;
}
}
mrb_name_error(mrb, mid, "`%s' is not a struct member",
mrb_sym2name(mrb, mid));
return mrb_nil_value(); /* not reached */
}
static mrb_value
mrb_struct_set_m(mrb_state *mrb, mrb_value obj)
{
mrb_value val;
mrb_get_args(mrb, "o", &val);
return mrb_struct_set(mrb, obj, val);
}
#define is_notop_id(id) (id)//((id)>tLAST_TOKEN)
#define is_local_id(id) (is_notop_id(id))//&&((id)&ID_SCOPE_MASK)==ID_LOCAL)
int
mrb_is_local_id(mrb_sym id)
{
return is_local_id(id);
}
#define is_const_id(id) (is_notop_id(id))//&&((id)&ID_SCOPE_MASK)==ID_CONST)
int
mrb_is_const_id(mrb_sym id)
{
return is_const_id(id);
}
static mrb_value
make_struct(mrb_state *mrb, mrb_value name, mrb_value members, struct RClass * klass)
{
mrb_value nstr, *ptr_members;
mrb_sym id;
long i, len;
struct RClass *c;
//OBJ_FREEZE(members);
if (mrb_nil_p(name)) {
c = mrb_class_new(mrb, klass);
}
else {
/* old style: should we warn? */
name = mrb_str_to_str(mrb, name);
id = mrb_to_id(mrb, name);
if (!mrb_is_const_id(id)) {
mrb_name_error(mrb, id, "identifier %s needs to be constant", mrb_string_value_ptr(mrb, name));
}
if (mrb_const_defined_at(mrb, klass, id)) {
mrb_warn("redefining constant Struct::%s", mrb_string_value_ptr(mrb, name));
//?rb_mod_remove_const(klass, mrb_sym2name(mrb, id));
}
c = mrb_define_class_under(mrb, klass, RSTRING_PTR(name), klass);
}
MRB_SET_INSTANCE_TT(c, MRB_TT_STRUCT);
nstr = mrb_obj_value(c);
mrb_iv_set(mrb, nstr, mrb_intern(mrb, "__members__"), members);
mrb_define_class_method(mrb, c, "new", mrb_instance_new, ARGS_ANY());
mrb_define_class_method(mrb, c, "[]", mrb_instance_new, ARGS_ANY());
mrb_define_class_method(mrb, c, "members", mrb_struct_s_members_m, ARGS_NONE());
//RSTRUCT(nstr)->basic.c->super = c->c;
ptr_members = RARRAY_PTR(members);
len = RARRAY_LEN(members);
for (i=0; i< len; i++) {
mrb_sym id = SYM2ID(ptr_members[i]);
if (mrb_is_local_id(id) || mrb_is_const_id(id)) {
if (i < N_REF_FUNC) {
mrb_define_method_id(mrb, c, id, ref_func[i], ARGS_NONE());
}
else {
mrb_define_method_id(mrb, c, id, mrb_struct_ref, ARGS_NONE());
}
mrb_define_method_id(mrb, c, mrb_id_attrset(mrb, id), mrb_struct_set_m, ARGS_REQ(1));
}
}
return nstr;
}
mrb_value
mrb_struct_define(mrb_state *mrb, const char *name, ...)
{
va_list ar;
mrb_value nm, ary;
char *mem;
if (!name) nm = mrb_nil_value();
else nm = mrb_str_new2(mrb, name);
ary = mrb_ary_new(mrb);
va_start(ar, name);
while ((mem = va_arg(ar, char*)) != 0) {
mrb_sym slot = mrb_intern(mrb, mem);
mrb_ary_push(mrb, ary, mrb_symbol_value(slot));
}
va_end(ar);
return make_struct(mrb, nm, ary, struct_class(mrb));
}
/* 15.2.18.3.1 */
/*
* call-seq:
* Struct.new( [aString] [, aSym]+> ) -> StructClass
* StructClass.new(arg, ...) -> obj
* StructClass[arg, ...] -> obj
*
* Creates a new class, named by <i>aString</i>, containing accessor
* methods for the given symbols. If the name <i>aString</i> is
* omitted, an anonymous structure class will be created. Otherwise,
* the name of this struct will appear as a constant in class
* <code>Struct</code>, so it must be unique for all
* <code>Struct</code>s in the system and should start with a capital
* letter. Assigning a structure class to a constant effectively gives
* the class the name of the constant.
*
* <code>Struct::new</code> returns a new <code>Class</code> object,
* which can then be used to create specific instances of the new
* structure. The number of actual parameters must be
* less than or equal to the number of attributes defined for this
* class; unset parameters default to <code>nil</code>. Passing too many
* parameters will raise an <code>ArgumentError</code>.
*
* The remaining methods listed in this section (class and instance)
* are defined for this generated class.
*
* # Create a structure with a name in Struct
* Struct.new("Customer", :name, :address) #=> Struct::Customer
* Struct::Customer.new("Dave", "123 Main") #=> #<struct Struct::Customer name="Dave", address="123 Main">
*
* # Create a structure named by its constant
* Customer = Struct.new(:name, :address) #=> Customer
* Customer.new("Dave", "123 Main") #=> #<struct Customer name="Dave", address="123 Main">
*/
static mrb_value
mrb_struct_s_def(mrb_state *mrb, mrb_value klass)
{
mrb_value name, rest;
mrb_value *pargv;
int argcnt;
long i;
mrb_value b, st;
mrb_sym id;
mrb_value *argv;
int argc;
name = mrb_nil_value();
rest = mrb_nil_value();
mrb_get_args(mrb, "*&", &argv, &argc, &b);
if (argc == 0) { /* special case to avoid crash */
rest = mrb_ary_new(mrb);
}
else {
if (argc > 0) name = argv[0];
if (argc > 1) rest = argv[1];
if (mrb_type(rest) == MRB_TT_ARRAY) {
if (!mrb_nil_p(name) && SYMBOL_P(name)) {
/* 1stArgument:symbol -> name=nil rest=argv[0]-[n] */
mrb_ary_unshift(mrb, rest, name);
name = mrb_nil_value();
}
}
else {
pargv = &argv[1];
argcnt = argc-1;
if (!mrb_nil_p(name) && SYMBOL_P(name)) {
/* 1stArgument:symbol -> name=nil rest=argv[0]-[n] */
name = mrb_nil_value();
pargv = &argv[0];
argcnt++;
}
rest = mrb_ary_new_from_values(mrb, argcnt, pargv);
}
for (i=0; i<RARRAY_LEN(rest); i++) {
id = mrb_to_id(mrb, RARRAY_PTR(rest)[i]);
RARRAY_PTR(rest)[i] = mrb_symbol_value(id);
}
}
st = make_struct(mrb, name, rest, struct_class(mrb));
if (!mrb_nil_p(b)) {
mrb_funcall(mrb, b, "call", 1, &st);
}
return st;
}
static int
num_members(mrb_state *mrb, struct RClass *klass)
{
mrb_value members;
members = struct_ivar_get(mrb, mrb_obj_value(klass), mrb_intern(mrb, "__members__"));
if (mrb_type(members) != MRB_TT_ARRAY) {
mrb_raise(mrb, E_TYPE_ERROR, "broken members");
}
return RARRAY_LEN(members);
}
/* 15.2.18.4.8 */
/*
*/
static mrb_value
mrb_struct_initialize_withArg(mrb_state *mrb, int argc, mrb_value *argv, mrb_value self)
{
struct RClass *klass = mrb_obj_class(mrb, self);
int n;
struct RStruct *st;
mrb_struct_modify(self);
n = num_members(mrb, klass);
if (n < argc) {
mrb_raise(mrb, E_ARGUMENT_ERROR, "struct size differs");
}
st = RSTRUCT(self);
st->ptr = (mrb_value *)mrb_calloc(mrb, sizeof(mrb_value), n);
st->len = n;
memcpy(st->ptr, argv, sizeof(mrb_value)*argc);
return self;
}
static mrb_value
mrb_struct_initialize_m(mrb_state *mrb, /*int argc, mrb_value *argv,*/ mrb_value self)
{
mrb_value *argv;
int argc;
mrb_get_args(mrb, "*", &argv, &argc);
return mrb_struct_initialize_withArg(mrb, argc, argv, self);
}
mrb_value
mrb_struct_initialize(mrb_state *mrb, mrb_value self, mrb_value values)
{
return mrb_struct_initialize_withArg(mrb, RARRAY_LEN(values), RARRAY_PTR(values), self);
}
static mrb_value
inspect_struct(mrb_state *mrb, mrb_value s, mrb_value dummy, int recur)
{
const char *cn = mrb_class_name(mrb, mrb_obj_class(mrb, s));
mrb_value members, str = mrb_str_new(mrb, "#<struct ", 9);
mrb_value *ptr, *ptr_members;
long i, len;
if (cn) {
mrb_str_append(mrb, str, mrb_str_new_cstr(mrb, cn));
}
if (recur) {
return mrb_str_cat2(mrb, str, ":...>");
}
members = mrb_struct_members(mrb, s);
ptr_members = RARRAY_PTR(members);
ptr = RSTRUCT_PTR(s);
len = RSTRUCT_LEN(s);
for (i=0; i<len; i++) {
mrb_value slot;
mrb_sym id;
if (i > 0) {
mrb_str_cat2(mrb, str, ", ");
}
else if (cn) {
mrb_str_cat2(mrb, str, " ");
}
slot = ptr_members[i];
id = SYM2ID(slot);
if (mrb_is_local_id(id) || mrb_is_const_id(id)) {
const char *name;
int len;
name = mrb_sym2name_len(mrb, id, &len);
mrb_str_append(mrb, str, mrb_str_new(mrb, name, len));
}
else {
mrb_str_append(mrb, str, mrb_inspect(mrb, slot));
}
mrb_str_cat2(mrb, str, "=");
mrb_str_append(mrb, str, mrb_inspect(mrb, ptr[i]));
}
mrb_str_cat2(mrb, str, ">");
return str;
}
/*
* call-seq:
* struct.to_s -> string
* struct.inspect -> string
*
* Describe the contents of this struct in a string.
*/
static mrb_value
mrb_struct_inspect(mrb_state *mrb, mrb_value s)
{
return inspect_struct(mrb, s, s, 0);
}
/* 15.2.18.4.9 */
/* :nodoc: */
mrb_value
mrb_struct_init_copy(mrb_state *mrb, mrb_value copy)
{
mrb_value s;
mrb_get_args(mrb, "o", &s);
if (mrb_obj_equal(mrb, copy, s)) return copy;
if (!mrb_obj_is_instance_of(mrb, s, mrb_obj_class(mrb, copy))) {
mrb_raise(mrb, E_TYPE_ERROR, "wrong argument class");
}
if (RSTRUCT_LEN(copy) != RSTRUCT_LEN(s)) {
mrb_raise(mrb, E_TYPE_ERROR, "struct size mismatch");
}
memcpy(RSTRUCT_PTR(copy), RSTRUCT_PTR(s), sizeof(mrb_value)*RSTRUCT_LEN(copy));
return copy;
}
static mrb_value
mrb_struct_aref_id(mrb_state *mrb, mrb_value s, mrb_sym id)
{
mrb_value *ptr, members, *ptr_members;
long i, len;
ptr = RSTRUCT_PTR(s);
members = mrb_struct_members(mrb, s);
ptr_members = RARRAY_PTR(members);
len = RARRAY_LEN(members);
for (i=0; i<len; i++) {
if (SYM2ID(ptr_members[i]) == id) {
return ptr[i];
}
}
mrb_name_error(mrb, id, "no member '%s' in struct", mrb_sym2name(mrb, id));
return mrb_nil_value(); /* not reached */
}
/* 15.2.18.4.2 */
/*
* call-seq:
* struct[symbol] -> anObject
* struct[fixnum] -> anObject
*
* Attribute Reference---Returns the value of the instance variable
* named by <i>symbol</i>, or indexed (0..length-1) by
* <i>fixnum</i>. Will raise <code>NameError</code> if the named
* variable does not exist, or <code>IndexError</code> if the index is
* out of range.
*
* Customer = Struct.new(:name, :address, :zip)
* joe = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345)
*
* joe["name"] #=> "Joe Smith"
* joe[:name] #=> "Joe Smith"
* joe[0] #=> "Joe Smith"
*/
mrb_value
mrb_struct_aref_n(mrb_state *mrb, mrb_value s, mrb_value idx)
{
long i;
if (mrb_type(idx) == MRB_TT_STRING || mrb_type(idx) == MRB_TT_SYMBOL) {
return mrb_struct_aref_id(mrb, s, mrb_to_id(mrb, idx));
}
i = mrb_fixnum(idx);
if (i < 0) i = RSTRUCT_LEN(s) + i;
if (i < 0)
mrb_raise(mrb, E_INDEX_ERROR, "offset %ld too small for struct(size:%ld)",
i, RSTRUCT_LEN(s));
if (RSTRUCT_LEN(s) <= i)
mrb_raise(mrb, E_INDEX_ERROR, "offset %ld too large for struct(size:%ld)",
i, RSTRUCT_LEN(s));
return RSTRUCT_PTR(s)[i];
}
mrb_value
mrb_struct_aref(mrb_state *mrb, mrb_value s)
{
mrb_value idx;
mrb_get_args(mrb, "o", &idx);
return mrb_struct_aref_n(mrb, s, idx);
}
static mrb_value
mrb_struct_aset_id(mrb_state *mrb, mrb_value s, mrb_sym id, mrb_value val)
{
mrb_value members, *ptr, *ptr_members;
long i, len;
members = mrb_struct_members(mrb, s);
len = RARRAY_LEN(members);
mrb_struct_modify(s);
if (RSTRUCT_LEN(s) != len) {
mrb_raise(mrb, E_TYPE_ERROR, "struct size differs (%ld required %ld given)",
len, RSTRUCT_LEN(s));
}
ptr = RSTRUCT_PTR(s);
ptr_members = RARRAY_PTR(members);
for (i=0; i<len; i++) {
if (SYM2ID(ptr_members[i]) == id) {
ptr[i] = val;
return val;
}
}
mrb_name_error(mrb, id, "no member '%s' in struct", mrb_sym2name(mrb, id));
return val; /* not reach */
}
/* 15.2.18.4.3 */
/*
* call-seq:
* struct[symbol] = obj -> obj
* struct[fixnum] = obj -> obj
*
* Attribute Assignment---Assigns to the instance variable named by
* <i>symbol</i> or <i>fixnum</i> the value <i>obj</i> and
* returns it. Will raise a <code>NameError</code> if the named
* variable does not exist, or an <code>IndexError</code> if the index
* is out of range.
*
* Customer = Struct.new(:name, :address, :zip)
* joe = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345)
*
* joe["name"] = "Luke"
* joe[:zip] = "90210"
*
* joe.name #=> "Luke"
* joe.zip #=> "90210"
*/
mrb_value
mrb_struct_aset(mrb_state *mrb, mrb_value s)
{
long i;
mrb_value idx;
mrb_value val;
mrb_get_args(mrb, "oo", &idx, &val);
if (mrb_type(idx) == MRB_TT_STRING || mrb_type(idx) == MRB_TT_SYMBOL) {
return mrb_struct_aset_id(mrb, s, mrb_to_id(mrb, idx), val);
}
i = mrb_fixnum(idx);
if (i < 0) i = RSTRUCT_LEN(s) + i;
if (i < 0) {
mrb_raise(mrb, E_INDEX_ERROR, "offset %ld too small for struct(size:%ld)",
i, RSTRUCT_LEN(s));
}
if (RSTRUCT_LEN(s) <= i) {
mrb_raise(mrb, E_INDEX_ERROR, "offset %ld too large for struct(size:%ld)",
i, RSTRUCT_LEN(s));
}
mrb_struct_modify(s);
return RSTRUCT_PTR(s)[i] = val;
}
/* 15.2.18.4.1 */
/*
* call-seq:
* struct == other_struct -> true or false
*
* Equality---Returns <code>true</code> if <i>other_struct</i> is
* equal to this one: they must be of the same class as generated by
* <code>Struct::new</code>, and the values of all instance variables
* must be equal (according to <code>Object#==</code>).
*
* Customer = Struct.new(:name, :address, :zip)
* joe = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345)
* joejr = Customer.new("Joe Smith", "123 Maple, Anytown NC", 12345)
* jane = Customer.new("Jane Doe", "456 Elm, Anytown NC", 12345)
* joe == joejr #=> true
* joe == jane #=> false
*/
static mrb_value
mrb_struct_equal(mrb_state *mrb, mrb_value s)
{
mrb_value s2;
mrb_value *ptr, *ptr2;
long i, len;
mrb_get_args(mrb, "o", &s2);
if (mrb_obj_equal(mrb, s, s2)) return mrb_true_value();
if (mrb_type(s2) != MRB_TT_STRUCT) return mrb_false_value();
if (mrb_obj_class(mrb, s) != mrb_obj_class(mrb, s2)) return mrb_false_value();
if (RSTRUCT_LEN(s) != RSTRUCT_LEN(s2)) {
mrb_bug("inconsistent struct"); /* should never happen */
}
ptr = RSTRUCT_PTR(s);
ptr2 = RSTRUCT_PTR(s2);
len = RSTRUCT_LEN(s);
for (i=0; i<len; i++) {
if (!mrb_equal(mrb, ptr[i], ptr2[i])) return mrb_false_value();
}
return mrb_true_value();
}
/* 15.2.18.4.12(x) */
/*
* code-seq:
* struct.eql?(other) -> true or false
*
* Two structures are equal if they are the same object, or if all their
* fields are equal (using <code>eql?</code>).
*/
static mrb_value
mrb_struct_eql(mrb_state *mrb, mrb_value s)
{
mrb_value s2;
mrb_value *ptr, *ptr2;
long i, len;
mrb_get_args(mrb, "o", &s2);
if (mrb_obj_equal(mrb, s, s2)) return mrb_true_value();
if (mrb_type(s2) != MRB_TT_STRUCT) return mrb_false_value();
if (mrb_obj_class(mrb, s) != mrb_obj_class(mrb, s2)) return mrb_false_value();
if (RSTRUCT_LEN(s) != RSTRUCT_LEN(s2)) {
mrb_bug("inconsistent struct"); /* should never happen */
}
ptr = RSTRUCT_PTR(s);
ptr2 = RSTRUCT_PTR(s2);
len = RSTRUCT_LEN(s);
for (i=0; i<len; i++) {
if (!mrb_eql(mrb, ptr[i], ptr2[i])) return mrb_false_value();
}
return mrb_true_value();
}
/*
* A <code>Struct</code> is a convenient way to bundle a number of
* attributes together, using accessor methods, without having to write
* an explicit class.
*
* The <code>Struct</code> class is a generator of specific classes,
* each one of which is defined to hold a set of variables and their
* accessors. In these examples, we'll call the generated class
* ``<i>Customer</i>Class,'' and we'll show an example instance of that
* class as ``<i>Customer</i>Inst.''
*
* In the descriptions that follow, the parameter <i>symbol</i> refers
* to a symbol, which is either a quoted string or a
* <code>Symbol</code> (such as <code>:name</code>).
*/
void
mrb_init_struct(mrb_state *mrb)
{
struct RClass *st;
st = mrb_define_class(mrb, "Struct", mrb->object_class);
mrb_define_class_method(mrb, st, "new", mrb_struct_s_def, ARGS_ANY()); /* 15.2.18.3.1 */
mrb_define_method(mrb, st, "==", mrb_struct_equal, ARGS_REQ(1)); /* 15.2.18.4.1 */
mrb_define_method(mrb, st, "[]", mrb_struct_aref, ARGS_REQ(1)); /* 15.2.18.4.2 */
mrb_define_method(mrb, st, "[]=", mrb_struct_aset, ARGS_REQ(2)); /* 15.2.18.4.3 */
mrb_define_method(mrb, st, "members", mrb_struct_members_m, ARGS_NONE()); /* 15.2.18.4.6 */
mrb_define_method(mrb, st, "initialize", mrb_struct_initialize_m,ARGS_ANY()); /* 15.2.18.4.8 */
mrb_define_method(mrb, st, "initialize_copy", mrb_struct_init_copy, ARGS_REQ(1)); /* 15.2.18.4.9 */
mrb_define_method(mrb, st, "inspect", mrb_struct_inspect, ARGS_NONE()); /* 15.2.18.4.10(x) */
mrb_define_alias(mrb, st, "to_s", "inspect"); /* 15.2.18.4.11(x) */
mrb_define_method(mrb, st, "eql?", mrb_struct_eql, ARGS_REQ(1)); /* 15.2.18.4.12(x) */
}
#endif /* ENABLE_STRUCT */
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