Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
Fetching contributors…

Cannot retrieve contributors at this time

1663 lines (1471 sloc) 42.324 kb
/**********************************************************************
class.c -
$Author$
created at: Tue Aug 10 15:05:44 JST 1993
Copyright (C) 1993-2007 Yukihiro Matsumoto
**********************************************************************/
/*!
* \defgroup class Classes and their hierarchy.
* \par Terminology
* - class: same as in Ruby.
* - singleton class: class for a particular object
* - eigenclass: = singleton class
* - metaclass: class of a class. metaclass is a kind of singleton class.
* - metametaclass: class of a metaclass.
* - meta^(n)-class: class of a meta^(n-1)-class.
* - attached object: A singleton class knows its unique instance.
* The instance is called the attached object for the singleton class.
* \{
*/
#include "ruby/ruby.h"
#include "ruby/st.h"
#include "method.h"
#include "constant.h"
#include "vm_core.h"
#include "internal.h"
#include <ctype.h>
extern st_table *rb_class_tbl;
static ID id_attached;
/**
* Allocates a struct RClass for a new class.
*
* \param flags initial value for basic.flags of the returned class.
* \param klass the class of the returned class.
* \return an uninitialized Class object.
* \pre \p klass must refer \c Class class or an ancestor of Class.
* \pre \code (flags | T_CLASS) != 0 \endcode
* \post the returned class can safely be \c #initialize 'd.
*
* \note this function is not Class#allocate.
*/
static VALUE
class_alloc(VALUE flags, VALUE klass)
{
NEWOBJ(obj, struct RClass);
OBJSETUP(obj, klass, flags);
obj->ptr = ALLOC(rb_classext_t);
RCLASS_IV_TBL(obj) = 0;
RCLASS_CONST_TBL(obj) = 0;
RCLASS_M_TBL(obj) = 0;
RCLASS_SUPER(obj) = 0;
RCLASS_IV_INDEX_TBL(obj) = 0;
return (VALUE)obj;
}
/*!
* A utility function that wraps class_alloc.
*
* allocates a class and initializes safely.
* \param super a class from which the new class derives.
* \return a class object.
* \pre \a super must be a class.
* \post the metaclass of the new class is Class.
*/
VALUE
rb_class_boot(VALUE super)
{
VALUE klass = class_alloc(T_CLASS, rb_cClass);
RCLASS_SUPER(klass) = super;
RCLASS_M_TBL(klass) = st_init_numtable();
OBJ_INFECT(klass, super);
return (VALUE)klass;
}
/*!
* Ensures a class can be derived from super.
*
* \param super a reference to an object.
* \exception TypeError if \a super is not a Class or \a super is a singleton class.
*/
void
rb_check_inheritable(VALUE super)
{
if (!RB_TYPE_P(super, T_CLASS)) {
rb_raise(rb_eTypeError, "superclass must be a Class (%s given)",
rb_obj_classname(super));
}
if (RBASIC(super)->flags & FL_SINGLETON) {
rb_raise(rb_eTypeError, "can't make subclass of singleton class");
}
if (super == rb_cClass) {
rb_raise(rb_eTypeError, "can't make subclass of Class");
}
}
/*!
* Creates a new class.
* \param super a class from which the new class derives.
* \exception TypeError \a super is not inheritable.
* \exception TypeError \a super is the Class class.
*/
VALUE
rb_class_new(VALUE super)
{
Check_Type(super, T_CLASS);
rb_check_inheritable(super);
return rb_class_boot(super);
}
static void
rb_mod_clone_method(VALUE klass, ID mid, const rb_method_entry_t *me)
{
VALUE newiseqval;
if (me->def && me->def->type == VM_METHOD_TYPE_ISEQ) {
rb_iseq_t *iseq;
newiseqval = rb_iseq_clone(me->def->body.iseq->self, klass);
GetISeqPtr(newiseqval, iseq);
rb_add_method(klass, mid, VM_METHOD_TYPE_ISEQ, iseq, me->flag);
RB_GC_GUARD(newiseqval);
}
else {
rb_method_entry_set(klass, mid, me, me->flag);
}
}
static int
clone_method_i(st_data_t key, st_data_t value, st_data_t data)
{
rb_mod_clone_method((VALUE)data, (ID)key, (const rb_method_entry_t *)value);
return ST_CONTINUE;
}
static int
clone_const(ID key, const rb_const_entry_t *ce, st_table *tbl)
{
rb_const_entry_t *nce = ALLOC(rb_const_entry_t);
*nce = *ce;
st_insert(tbl, key, (st_data_t)nce);
return ST_CONTINUE;
}
static int
clone_const_i(st_data_t key, st_data_t value, st_data_t data)
{
return clone_const((ID)key, (const rb_const_entry_t *)value, (st_table *)data);
}
/* :nodoc: */
VALUE
rb_mod_init_copy(VALUE clone, VALUE orig)
{
rb_obj_init_copy(clone, orig);
if (!FL_TEST(CLASS_OF(clone), FL_SINGLETON)) {
RBASIC(clone)->klass = rb_singleton_class_clone(orig);
rb_singleton_class_attached(RBASIC(clone)->klass, (VALUE)clone);
}
RCLASS_SUPER(clone) = RCLASS_SUPER(orig);
if (RCLASS_IV_TBL(orig)) {
st_data_t id;
if (RCLASS_IV_TBL(clone)) {
st_free_table(RCLASS_IV_TBL(clone));
}
RCLASS_IV_TBL(clone) = st_copy(RCLASS_IV_TBL(orig));
CONST_ID(id, "__classpath__");
st_delete(RCLASS_IV_TBL(clone), &id, 0);
CONST_ID(id, "__classid__");
st_delete(RCLASS_IV_TBL(clone), &id, 0);
}
if (RCLASS_CONST_TBL(orig)) {
if (RCLASS_CONST_TBL(clone)) {
rb_free_const_table(RCLASS_CONST_TBL(clone));
}
RCLASS_CONST_TBL(clone) = st_init_numtable();
st_foreach(RCLASS_CONST_TBL(orig), clone_const_i, (st_data_t)RCLASS_CONST_TBL(clone));
}
if (RCLASS_M_TBL(orig)) {
if (RCLASS_M_TBL(clone)) {
rb_free_m_table(RCLASS_M_TBL(clone));
}
RCLASS_M_TBL(clone) = st_init_numtable();
st_foreach(RCLASS_M_TBL(orig), clone_method_i, (st_data_t)clone);
}
return clone;
}
/* :nodoc: */
VALUE
rb_class_init_copy(VALUE clone, VALUE orig)
{
if (orig == rb_cBasicObject) {
rb_raise(rb_eTypeError, "can't copy the root class");
}
if (RCLASS_SUPER(clone) != 0 || clone == rb_cBasicObject) {
rb_raise(rb_eTypeError, "already initialized class");
}
if (FL_TEST(orig, FL_SINGLETON)) {
rb_raise(rb_eTypeError, "can't copy singleton class");
}
return rb_mod_init_copy(clone, orig);
}
VALUE
rb_singleton_class_clone(VALUE obj)
{
VALUE klass = RBASIC(obj)->klass;
if (!FL_TEST(klass, FL_SINGLETON))
return klass;
else {
/* copy singleton(unnamed) class */
VALUE clone = class_alloc(RBASIC(klass)->flags, 0);
if (BUILTIN_TYPE(obj) == T_CLASS) {
RBASIC(clone)->klass = clone;
}
else {
RBASIC(clone)->klass = rb_singleton_class_clone(klass);
}
RCLASS_SUPER(clone) = RCLASS_SUPER(klass);
if (RCLASS_IV_TBL(klass)) {
RCLASS_IV_TBL(clone) = st_copy(RCLASS_IV_TBL(klass));
}
if (RCLASS_CONST_TBL(klass)) {
RCLASS_CONST_TBL(clone) = st_init_numtable();
st_foreach(RCLASS_CONST_TBL(klass), clone_const_i, (st_data_t)RCLASS_CONST_TBL(clone));
}
RCLASS_M_TBL(clone) = st_init_numtable();
st_foreach(RCLASS_M_TBL(klass), clone_method_i, (st_data_t)clone);
rb_singleton_class_attached(RBASIC(clone)->klass, clone);
FL_SET(clone, FL_SINGLETON);
return clone;
}
}
/*!
* Attach a object to a singleton class.
* @pre \a klass is the singleton class of \a obj.
*/
void
rb_singleton_class_attached(VALUE klass, VALUE obj)
{
if (FL_TEST(klass, FL_SINGLETON)) {
if (!RCLASS_IV_TBL(klass)) {
RCLASS_IV_TBL(klass) = st_init_numtable();
}
st_insert(RCLASS_IV_TBL(klass), id_attached, obj);
}
}
#define METACLASS_OF(k) RBASIC(k)->klass
/*!
* whether k is a meta^(n)-class of Class class
* @retval 1 if \a k is a meta^(n)-class of Class class (n >= 0)
* @retval 0 otherwise
*/
#define META_CLASS_OF_CLASS_CLASS_P(k) (METACLASS_OF(k) == (k))
/*!
* ensures \a klass belongs to its own eigenclass.
* @return the eigenclass of \a klass
* @post \a klass belongs to the returned eigenclass.
* i.e. the attached object of the eigenclass is \a klass.
* @note this macro creates a new eigenclass if necessary.
*/
#define ENSURE_EIGENCLASS(klass) \
(rb_ivar_get(METACLASS_OF(klass), id_attached) == (klass) ? METACLASS_OF(klass) : make_metaclass(klass))
/*!
* Creates a metaclass of \a klass
* \param klass a class
* \return created metaclass for the class
* \pre \a klass is a Class object
* \pre \a klass has no singleton class.
* \post the class of \a klass is the returned class.
* \post the returned class is meta^(n+1)-class when \a klass is a meta^(n)-klass for n >= 0
*/
static inline VALUE
make_metaclass(VALUE klass)
{
VALUE super;
VALUE metaclass = rb_class_boot(Qundef);
FL_SET(metaclass, FL_SINGLETON);
rb_singleton_class_attached(metaclass, klass);
if (META_CLASS_OF_CLASS_CLASS_P(klass)) {
METACLASS_OF(klass) = METACLASS_OF(metaclass) = metaclass;
}
else {
VALUE tmp = METACLASS_OF(klass); /* for a meta^(n)-class klass, tmp is meta^(n)-class of Class class */
METACLASS_OF(klass) = metaclass;
METACLASS_OF(metaclass) = ENSURE_EIGENCLASS(tmp);
}
super = RCLASS_SUPER(klass);
while (RB_TYPE_P(super, T_ICLASS)) super = RCLASS_SUPER(super);
RCLASS_SUPER(metaclass) = super ? ENSURE_EIGENCLASS(super) : rb_cClass;
OBJ_INFECT(metaclass, RCLASS_SUPER(metaclass));
return metaclass;
}
/*!
* Creates a singleton class for \a obj.
* \pre \a obj must not a immediate nor a special const.
* \pre \a obj must not a Class object.
* \pre \a obj has no singleton class.
*/
static inline VALUE
make_singleton_class(VALUE obj)
{
VALUE orig_class = RBASIC(obj)->klass;
VALUE klass = rb_class_boot(orig_class);
FL_SET(klass, FL_SINGLETON);
RBASIC(obj)->klass = klass;
rb_singleton_class_attached(klass, obj);
METACLASS_OF(klass) = METACLASS_OF(rb_class_real(orig_class));
return klass;
}
static VALUE
boot_defclass(const char *name, VALUE super)
{
extern st_table *rb_class_tbl;
VALUE obj = rb_class_boot(super);
ID id = rb_intern(name);
rb_name_class(obj, id);
st_add_direct(rb_class_tbl, id, obj);
rb_const_set((rb_cObject ? rb_cObject : obj), id, obj);
return obj;
}
void
Init_class_hierarchy(void)
{
id_attached = rb_intern("__attached__");
rb_cBasicObject = boot_defclass("BasicObject", 0);
rb_cObject = boot_defclass("Object", rb_cBasicObject);
rb_cModule = boot_defclass("Module", rb_cObject);
rb_cClass = boot_defclass("Class", rb_cModule);
rb_const_set(rb_cObject, rb_intern("BasicObject"), rb_cBasicObject);
RBASIC(rb_cClass)->klass
= RBASIC(rb_cModule)->klass
= RBASIC(rb_cObject)->klass
= RBASIC(rb_cBasicObject)->klass
= rb_cClass;
}
/*!
* \internal
* Creates a new *singleton class* for an object.
*
* \pre \a obj has no singleton class.
* \note DO NOT USE the function in an extension libraries. Use \ref rb_singleton_class.
* \param obj An object.
* \param unused ignored.
* \return The singleton class of the object.
*/
VALUE
rb_make_metaclass(VALUE obj, VALUE unused)
{
if (BUILTIN_TYPE(obj) == T_CLASS) {
return make_metaclass(obj);
}
else {
return make_singleton_class(obj);
}
}
/*!
* Defines a new class.
* \param id ignored
* \param super A class from which the new class will derive. NULL means \c Object class.
* \return the created class
* \throw TypeError if super is not a \c Class object.
*
* \note the returned class will not be associated with \a id.
* You must explicitly set a class name if necessary.
*/
VALUE
rb_define_class_id(ID id, VALUE super)
{
VALUE klass;
if (!super) super = rb_cObject;
klass = rb_class_new(super);
rb_make_metaclass(klass, RBASIC(super)->klass);
return klass;
}
/*!
* Calls Class#inherited.
* \param super A class which will be called #inherited.
* NULL means Object class.
* \param klass A Class object which derived from \a super
* \return the value \c Class#inherited's returns
* \pre Each of \a super and \a klass must be a \c Class object.
*/
VALUE
rb_class_inherited(VALUE super, VALUE klass)
{
ID inherited;
if (!super) super = rb_cObject;
CONST_ID(inherited, "inherited");
return rb_funcall(super, inherited, 1, klass);
}
/*!
* Defines a top-level class.
* \param name name of the class
* \param super a class from which the new class will derive.
* NULL means \c Object class.
* \return the created class
* \throw TypeError if the constant name \a name is already taken but
* the constant is not a \c Class.
* \throw NameError if the class is already defined but the class can not
* be reopened because its superclass is not \a super.
* \post top-level constant named \a name refers the returned class.
*
* \note if a class named \a name is already defined and its superclass is
* \a super, the function just returns the defined class.
*/
VALUE
rb_define_class(const char *name, VALUE super)
{
VALUE klass;
ID id;
id = rb_intern(name);
if (rb_const_defined(rb_cObject, id)) {
klass = rb_const_get(rb_cObject, id);
if (!RB_TYPE_P(klass, T_CLASS)) {
rb_raise(rb_eTypeError, "%s is not a class", name);
}
if (rb_class_real(RCLASS_SUPER(klass)) != super) {
rb_raise(rb_eTypeError, "superclass mismatch for class %s", name);
}
return klass;
}
if (!super) {
rb_warn("no super class for `%s', Object assumed", name);
}
klass = rb_define_class_id(id, super);
st_add_direct(rb_class_tbl, id, klass);
rb_name_class(klass, id);
rb_const_set(rb_cObject, id, klass);
rb_class_inherited(super, klass);
return klass;
}
/*!
* Defines a class under the namespace of \a outer.
* \param outer a class which contains the new class.
* \param name name of the new class
* \param super a class from which the new class will derive.
* NULL means \c Object class.
* \return the created class
* \throw TypeError if the constant name \a name is already taken but
* the constant is not a \c Class.
* \throw NameError if the class is already defined but the class can not
* be reopened because its superclass is not \a super.
* \post top-level constant named \a name refers the returned class.
*
* \note if a class named \a name is already defined and its superclass is
* \a super, the function just returns the defined class.
*/
VALUE
rb_define_class_under(VALUE outer, const char *name, VALUE super)
{
return rb_define_class_id_under(outer, rb_intern(name), super);
}
/*!
* Defines a class under the namespace of \a outer.
* \param outer a class which contains the new class.
* \param id name of the new class
* \param super a class from which the new class will derive.
* NULL means \c Object class.
* \return the created class
* \throw TypeError if the constant name \a name is already taken but
* the constant is not a \c Class.
* \throw NameError if the class is already defined but the class can not
* be reopened because its superclass is not \a super.
* \post top-level constant named \a name refers the returned class.
*
* \note if a class named \a name is already defined and its superclass is
* \a super, the function just returns the defined class.
*/
VALUE
rb_define_class_id_under(VALUE outer, ID id, VALUE super)
{
VALUE klass;
if (rb_const_defined_at(outer, id)) {
klass = rb_const_get_at(outer, id);
if (!RB_TYPE_P(klass, T_CLASS)) {
rb_raise(rb_eTypeError, "%s is not a class", rb_id2name(id));
}
if (rb_class_real(RCLASS_SUPER(klass)) != super) {
rb_name_error(id, "%s is already defined", rb_id2name(id));
}
return klass;
}
if (!super) {
rb_warn("no super class for `%s::%s', Object assumed",
rb_class2name(outer), rb_id2name(id));
}
klass = rb_define_class_id(id, super);
rb_set_class_path_string(klass, outer, rb_id2str(id));
rb_const_set(outer, id, klass);
rb_class_inherited(super, klass);
rb_gc_register_mark_object(klass);
return klass;
}
VALUE
rb_module_new(void)
{
VALUE mdl = class_alloc(T_MODULE, rb_cModule);
RCLASS_M_TBL(mdl) = st_init_numtable();
return (VALUE)mdl;
}
VALUE
rb_define_module_id(ID id)
{
VALUE mdl;
mdl = rb_module_new();
rb_name_class(mdl, id);
return mdl;
}
VALUE
rb_define_module(const char *name)
{
VALUE module;
ID id;
id = rb_intern(name);
if (rb_const_defined(rb_cObject, id)) {
module = rb_const_get(rb_cObject, id);
if (RB_TYPE_P(module, T_MODULE))
return module;
rb_raise(rb_eTypeError, "%s is not a module", rb_obj_classname(module));
}
module = rb_define_module_id(id);
st_add_direct(rb_class_tbl, id, module);
rb_const_set(rb_cObject, id, module);
return module;
}
VALUE
rb_define_module_under(VALUE outer, const char *name)
{
return rb_define_module_id_under(outer, rb_intern(name));
}
VALUE
rb_define_module_id_under(VALUE outer, ID id)
{
VALUE module;
if (rb_const_defined_at(outer, id)) {
module = rb_const_get_at(outer, id);
if (RB_TYPE_P(module, T_MODULE))
return module;
rb_raise(rb_eTypeError, "%s::%s is not a module",
rb_class2name(outer), rb_obj_classname(module));
}
module = rb_define_module_id(id);
rb_const_set(outer, id, module);
rb_set_class_path_string(module, outer, rb_id2str(id));
rb_gc_register_mark_object(module);
return module;
}
static VALUE
include_class_new(VALUE module, VALUE super)
{
VALUE klass = class_alloc(T_ICLASS, rb_cClass);
if (BUILTIN_TYPE(module) == T_ICLASS) {
module = RBASIC(module)->klass;
}
if (!RCLASS_IV_TBL(module)) {
RCLASS_IV_TBL(module) = st_init_numtable();
}
if (!RCLASS_CONST_TBL(module)) {
RCLASS_CONST_TBL(module) = st_init_numtable();
}
RCLASS_IV_TBL(klass) = RCLASS_IV_TBL(module);
RCLASS_CONST_TBL(klass) = RCLASS_CONST_TBL(module);
RCLASS_M_TBL(klass) = RCLASS_M_TBL(module);
RCLASS_SUPER(klass) = super;
if (RB_TYPE_P(module, T_ICLASS)) {
RBASIC(klass)->klass = RBASIC(module)->klass;
}
else {
RBASIC(klass)->klass = module;
}
OBJ_INFECT(klass, module);
OBJ_INFECT(klass, super);
return (VALUE)klass;
}
void
rb_include_module(VALUE klass, VALUE module)
{
VALUE p, c;
int changed = 0;
rb_frozen_class_p(klass);
if (!OBJ_UNTRUSTED(klass)) {
rb_secure(4);
}
if (!RB_TYPE_P(module, T_MODULE)) {
Check_Type(module, T_MODULE);
}
OBJ_INFECT(klass, module);
c = klass;
while (module) {
int superclass_seen = FALSE;
if (RCLASS_M_TBL(klass) == RCLASS_M_TBL(module))
rb_raise(rb_eArgError, "cyclic include detected");
/* ignore if the module included already in superclasses */
for (p = RCLASS_SUPER(klass); p; p = RCLASS_SUPER(p)) {
switch (BUILTIN_TYPE(p)) {
case T_ICLASS:
if (RCLASS_M_TBL(p) == RCLASS_M_TBL(module)) {
if (!superclass_seen) {
c = p; /* move insertion point */
}
goto skip;
}
break;
case T_CLASS:
superclass_seen = TRUE;
break;
}
}
c = RCLASS_SUPER(c) = include_class_new(module, RCLASS_SUPER(c));
if (RMODULE_M_TBL(module) && RMODULE_M_TBL(module)->num_entries)
changed = 1;
skip:
module = RCLASS_SUPER(module);
}
if (changed) rb_clear_cache();
}
struct mixing_arg {
st_table *mtbl;
ID id;
st_table *aliasing;
VALUE klass;
};
static int
check_mix_const_i(st_data_t key, st_data_t value, st_data_t arg)
{
struct mixing_arg *argp = (struct mixing_arg *)arg;
ID id = (ID)key;
st_table *aliasing = argp->aliasing;
st_data_t alias;
if (!rb_is_const_id(id)) return ST_CONTINUE;
if (aliasing && st_lookup(aliasing, ID2SYM(id), &alias)) {
id = rb_to_id(alias);
}
if (st_lookup(argp->mtbl, id, NULL)) {
argp->id = id;
return ST_STOP;
}
return ST_CONTINUE;
}
static int
do_mix_const_i(st_data_t key, st_data_t value, st_data_t arg)
{
struct mixing_arg *argp = (struct mixing_arg *)arg;
ID id = (ID)key;
st_table *aliasing = argp->aliasing;
st_data_t old, alias;
if (!rb_is_const_id(id)) return ST_CONTINUE;
if (aliasing && st_lookup(aliasing, ID2SYM(id), &alias)) {
id = rb_to_id(alias);
}
if (st_lookup(argp->mtbl, id, &old)) {
argp->id = id;
return ST_STOP;
}
st_insert(argp->mtbl, id, value);
return ST_CONTINUE;
}
static int
check_mix_method_i(st_data_t key, st_data_t value, st_data_t arg)
{
struct mixing_arg *argp = (struct mixing_arg *)arg;
ID id = (ID)key;
st_table *aliasing = argp->aliasing;
st_data_t alias;
if (aliasing && st_lookup(aliasing, ID2SYM(id), &alias)) {
if (NIL_P(alias)) return ST_CONTINUE;
id = rb_to_id(alias);
}
if (st_lookup(argp->mtbl, id, NULL)) {
argp->id = id;
return ST_STOP;
}
return ST_CONTINUE;
}
static int
do_mix_method_i(st_data_t key, st_data_t value, st_data_t arg)
{
struct mixing_arg *argp = (struct mixing_arg *)arg;
ID id = (ID)key;
st_table *aliasing = argp->aliasing;
st_data_t old, alias;
if (aliasing && st_lookup(aliasing, ID2SYM(id), &alias)) {
if (NIL_P(alias)) return ST_CONTINUE;
id = rb_to_id(alias);
}
if (st_lookup(argp->mtbl, id, &old)) {
argp->id = id;
return ST_STOP;
}
rb_mod_clone_method(argp->klass, id, (rb_method_entry_t *)value);
return ST_CONTINUE;
}
void
rb_mix_module(VALUE klass, VALUE module, st_table *constants, st_table *methods)
{
st_table *mtbl_from;
struct mixing_arg methodarg, constarg;
rb_frozen_class_p(klass);
if (!OBJ_UNTRUSTED(klass)) {
rb_secure(4);
}
if (!RB_TYPE_P(module, T_MODULE)) {
Check_Type(module, T_MODULE);
}
OBJ_INFECT(klass, module);
mtbl_from = RMODULE_M_TBL(module);
methodarg.mtbl = RMODULE_M_TBL(klass);
methodarg.id = 0;
methodarg.aliasing = methods;
methodarg.klass = klass;
constarg.mtbl = RMODULE_IV_TBL(klass);
constarg.id = 0;
constarg.aliasing = constants;
st_foreach(mtbl_from, check_mix_method_i, (st_data_t)&methodarg);
if (methodarg.id) {
rb_raise(rb_eArgError, "method would conflict - %s", rb_id2name(methodarg.id));
}
st_foreach(mtbl_from, check_mix_const_i, (st_data_t)&constarg);
if (constarg.id) {
rb_raise(rb_eArgError, "constant would conflict - %s", rb_id2name(constarg.id));
}
st_foreach(mtbl_from, do_mix_method_i, (st_data_t)&methodarg);
if (methodarg.id) {
rb_raise(rb_eArgError, "method would conflict - %s", rb_id2name(methodarg.id));
}
st_foreach(mtbl_from, do_mix_const_i, (st_data_t)&constarg);
if (constarg.id) {
rb_raise(rb_eArgError, "constant would conflict - %s", rb_id2name(constarg.id));
}
rb_vm_inc_const_missing_count();
}
/*
* call-seq:
* mod.included_modules -> array
*
* Returns the list of modules included in <i>mod</i>.
*
* module Mixin
* end
*
* module Outer
* include Mixin
* end
*
* Mixin.included_modules #=> []
* Outer.included_modules #=> [Mixin]
*/
VALUE
rb_mod_included_modules(VALUE mod)
{
VALUE ary = rb_ary_new();
VALUE p;
for (p = RCLASS_SUPER(mod); p; p = RCLASS_SUPER(p)) {
if (BUILTIN_TYPE(p) == T_ICLASS) {
rb_ary_push(ary, RBASIC(p)->klass);
}
}
return ary;
}
/*
* call-seq:
* mod.include?(module) -> true or false
*
* Returns <code>true</code> if <i>module</i> is included in
* <i>mod</i> or one of <i>mod</i>'s ancestors.
*
* module A
* end
* class B
* include A
* end
* class C < B
* end
* B.include?(A) #=> true
* C.include?(A) #=> true
* A.include?(A) #=> false
*/
VALUE
rb_mod_include_p(VALUE mod, VALUE mod2)
{
VALUE p;
Check_Type(mod2, T_MODULE);
for (p = RCLASS_SUPER(mod); p; p = RCLASS_SUPER(p)) {
if (BUILTIN_TYPE(p) == T_ICLASS) {
if (RBASIC(p)->klass == mod2) return Qtrue;
}
}
return Qfalse;
}
/*
* call-seq:
* mod.ancestors -> array
*
* Returns a list of modules included in <i>mod</i> (including
* <i>mod</i> itself).
*
* module Mod
* include Math
* include Comparable
* end
*
* Mod.ancestors #=> [Mod, Comparable, Math]
* Math.ancestors #=> [Math]
*/
VALUE
rb_mod_ancestors(VALUE mod)
{
VALUE p, ary = rb_ary_new();
for (p = mod; p; p = RCLASS_SUPER(p)) {
if (FL_TEST(p, FL_SINGLETON))
continue;
if (BUILTIN_TYPE(p) == T_ICLASS) {
rb_ary_push(ary, RBASIC(p)->klass);
}
else {
rb_ary_push(ary, p);
}
}
return ary;
}
#define VISI(x) ((x)&NOEX_MASK)
#define VISI_CHECK(x,f) (VISI(x) == (f))
static int
ins_methods_push(ID name, long type, VALUE ary, long visi)
{
if (type == -1) return ST_CONTINUE;
switch (visi) {
case NOEX_PRIVATE:
case NOEX_PROTECTED:
case NOEX_PUBLIC:
visi = (type == visi);
break;
default:
visi = (type != NOEX_PRIVATE);
break;
}
if (visi) {
rb_ary_push(ary, ID2SYM(name));
}
return ST_CONTINUE;
}
static int
ins_methods_i(st_data_t name, st_data_t type, st_data_t ary)
{
return ins_methods_push((ID)name, (long)type, (VALUE)ary, -1); /* everything but private */
}
static int
ins_methods_prot_i(st_data_t name, st_data_t type, st_data_t ary)
{
return ins_methods_push((ID)name, (long)type, (VALUE)ary, NOEX_PROTECTED);
}
static int
ins_methods_priv_i(st_data_t name, st_data_t type, st_data_t ary)
{
return ins_methods_push((ID)name, (long)type, (VALUE)ary, NOEX_PRIVATE);
}
static int
ins_methods_pub_i(st_data_t name, st_data_t type, st_data_t ary)
{
return ins_methods_push((ID)name, (long)type, (VALUE)ary, NOEX_PUBLIC);
}
static int
method_entry_i(st_data_t key, st_data_t value, st_data_t data)
{
const rb_method_entry_t *me = (const rb_method_entry_t *)value;
st_table *list = (st_table *)data;
long type;
if ((ID)key == ID_ALLOCATOR) {
return ST_CONTINUE;
}
if (!st_lookup(list, key, 0)) {
if (UNDEFINED_METHOD_ENTRY_P(me)) {
type = -1; /* none */
}
else {
type = VISI(me->flag);
}
st_add_direct(list, key, type);
}
return ST_CONTINUE;
}
static VALUE
class_instance_method_list(int argc, VALUE *argv, VALUE mod, int obj, int (*func) (st_data_t, st_data_t, st_data_t))
{
VALUE ary;
int recur;
st_table *list;
if (argc == 0) {
recur = TRUE;
}
else {
VALUE r;
rb_scan_args(argc, argv, "01", &r);
recur = RTEST(r);
}
list = st_init_numtable();
for (; mod; mod = RCLASS_SUPER(mod)) {
st_foreach(RCLASS_M_TBL(mod), method_entry_i, (st_data_t)list);
if (BUILTIN_TYPE(mod) == T_ICLASS) continue;
if (obj && FL_TEST(mod, FL_SINGLETON)) continue;
if (!recur) break;
}
ary = rb_ary_new();
st_foreach(list, func, ary);
st_free_table(list);
return ary;
}
/*
* call-seq:
* mod.instance_methods(include_super=true) -> array
*
* Returns an array containing the names of the public and protected instance
* methods in the receiver. For a module, these are the public and protected methods;
* for a class, they are the instance (not singleton) methods. With no
* argument, or with an argument that is <code>false</code>, the
* instance methods in <i>mod</i> are returned, otherwise the methods
* in <i>mod</i> and <i>mod</i>'s superclasses are returned.
*
* module A
* def method1() end
* end
* class B
* def method2() end
* end
* class C < B
* def method3() end
* end
*
* A.instance_methods #=> [:method1]
* B.instance_methods(false) #=> [:method2]
* C.instance_methods(false) #=> [:method3]
* C.instance_methods(true).length #=> 43
*/
VALUE
rb_class_instance_methods(int argc, VALUE *argv, VALUE mod)
{
return class_instance_method_list(argc, argv, mod, 0, ins_methods_i);
}
/*
* call-seq:
* mod.protected_instance_methods(include_super=true) -> array
*
* Returns a list of the protected instance methods defined in
* <i>mod</i>. If the optional parameter is not <code>false</code>, the
* methods of any ancestors are included.
*/
VALUE
rb_class_protected_instance_methods(int argc, VALUE *argv, VALUE mod)
{
return class_instance_method_list(argc, argv, mod, 0, ins_methods_prot_i);
}
/*
* call-seq:
* mod.private_instance_methods(include_super=true) -> array
*
* Returns a list of the private instance methods defined in
* <i>mod</i>. If the optional parameter is not <code>false</code>, the
* methods of any ancestors are included.
*
* module Mod
* def method1() end
* private :method1
* def method2() end
* end
* Mod.instance_methods #=> [:method2]
* Mod.private_instance_methods #=> [:method1]
*/
VALUE
rb_class_private_instance_methods(int argc, VALUE *argv, VALUE mod)
{
return class_instance_method_list(argc, argv, mod, 0, ins_methods_priv_i);
}
/*
* call-seq:
* mod.public_instance_methods(include_super=true) -> array
*
* Returns a list of the public instance methods defined in <i>mod</i>.
* If the optional parameter is not <code>false</code>, the methods of
* any ancestors are included.
*/
VALUE
rb_class_public_instance_methods(int argc, VALUE *argv, VALUE mod)
{
return class_instance_method_list(argc, argv, mod, 0, ins_methods_pub_i);
}
/*
* call-seq:
* obj.methods(all=true) -> array
*
* Returns a list of the names of public and protected methods of
* <i>obj</i>. This will include all the methods accessible in
* <i>obj</i>'s ancestors.
* If the <i>all</i> parameter is set to <code>false</code>, only those methods
* in the receiver will be listed.
*
* class Klass
* def klass_method()
* end
* end
* k = Klass.new
* k.methods[0..9] #=> [:klass_method, :nil?, :===,
* # :==~, :!, :eql?
* # :hash, :<=>, :class, :singleton_class]
* k.methods.length #=> 57
*/
VALUE
rb_obj_methods(int argc, VALUE *argv, VALUE obj)
{
retry:
if (argc == 0) {
return class_instance_method_list(argc, argv, CLASS_OF(obj), 1, ins_methods_i);
}
else {
VALUE recur;
rb_scan_args(argc, argv, "1", &recur);
if (RTEST(recur)) {
argc = 0;
goto retry;
}
return rb_obj_singleton_methods(argc, argv, obj);
}
}
/*
* call-seq:
* obj.protected_methods(all=true) -> array
*
* Returns the list of protected methods accessible to <i>obj</i>. If
* the <i>all</i> parameter is set to <code>false</code>, only those methods
* in the receiver will be listed.
*/
VALUE
rb_obj_protected_methods(int argc, VALUE *argv, VALUE obj)
{
return class_instance_method_list(argc, argv, CLASS_OF(obj), 1, ins_methods_prot_i);
}
/*
* call-seq:
* obj.private_methods(all=true) -> array
*
* Returns the list of private methods accessible to <i>obj</i>. If
* the <i>all</i> parameter is set to <code>false</code>, only those methods
* in the receiver will be listed.
*/
VALUE
rb_obj_private_methods(int argc, VALUE *argv, VALUE obj)
{
return class_instance_method_list(argc, argv, CLASS_OF(obj), 1, ins_methods_priv_i);
}
/*
* call-seq:
* obj.public_methods(all=true) -> array
*
* Returns the list of public methods accessible to <i>obj</i>. If
* the <i>all</i> parameter is set to <code>false</code>, only those methods
* in the receiver will be listed.
*/
VALUE
rb_obj_public_methods(int argc, VALUE *argv, VALUE obj)
{
return class_instance_method_list(argc, argv, CLASS_OF(obj), 1, ins_methods_pub_i);
}
/*
* call-seq:
* obj.singleton_methods(all=true) -> array
*
* Returns an array of the names of singleton methods for <i>obj</i>.
* If the optional <i>all</i> parameter is true, the list will include
* methods in modules included in <i>obj</i>.
* Only public and protected singleton methods are returned.
*
* module Other
* def three() end
* end
*
* class Single
* def Single.four() end
* end
*
* a = Single.new
*
* def a.one()
* end
*
* class << a
* include Other
* def two()
* end
* end
*
* Single.singleton_methods #=> [:four]
* a.singleton_methods(false) #=> [:two, :one]
* a.singleton_methods #=> [:two, :one, :three]
*/
VALUE
rb_obj_singleton_methods(int argc, VALUE *argv, VALUE obj)
{
VALUE recur, ary, klass;
st_table *list;
if (argc == 0) {
recur = Qtrue;
}
else {
rb_scan_args(argc, argv, "01", &recur);
}
klass = CLASS_OF(obj);
list = st_init_numtable();
if (klass && FL_TEST(klass, FL_SINGLETON)) {
st_foreach(RCLASS_M_TBL(klass), method_entry_i, (st_data_t)list);
klass = RCLASS_SUPER(klass);
}
if (RTEST(recur)) {
while (klass && (FL_TEST(klass, FL_SINGLETON) || RB_TYPE_P(klass, T_ICLASS))) {
st_foreach(RCLASS_M_TBL(klass), method_entry_i, (st_data_t)list);
klass = RCLASS_SUPER(klass);
}
}
ary = rb_ary_new();
st_foreach(list, ins_methods_i, ary);
st_free_table(list);
return ary;
}
/*!
* \}
*/
/*!
* \defgroup defmethod Defining methods
* There are some APIs to define a method from C.
* These API takes a C function as a method body.
*
* \par Method body functions
* Method body functions must return a VALUE and
* can be one of the following form:
* <dl>
* <dt>Fixed number of parameters</dt>
* <dd>
* This form is a normal C function, excepting it takes
* a receiver object as the first argument.
*
* \code
* static VALUE my_method(VALUE self, VALUE x, VALUE y);
* \endcode
* </dd>
* <dt>argc and argv style</dt>
* <dd>
* This form takes three parameters: \a argc, \a argv and \a self.
* \a self is the receiver. \a argc is the number of arguments.
* \a argv is a pointer to an array of the arguments.
*
* \code
* static VALUE my_method(int argc, VALUE *argv, VALUE self);
* \endcode
* </dd>
* <dt>Ruby array style</dt>
* <dd>
* This form takes two parameters: self and args.
* \a self is the receiver. \a args is an Array object which
* contains the arguments.
*
* \code
* static VALUE my_method(VALUE self, VALUE args);
* \endcode
* </dd>
*
* \par Number of parameters
* Method defining APIs takes the number of parameters which the
* method will takes. This number is called \a argc.
* \a argc can be:
* <dl>
* <dt>zero or positive number</dt>
* <dd>This means the method body function takes a fixed number of parameters</dd>
* <dt>-1</dt>
* <dd>This means the method body function is "argc and argv" style.</dd>
* <dt>-2</dt>
* <dd>This means the method body function is "self and args" style.</dd>
* </dl>
* \{
*/
void
rb_define_method_id(VALUE klass, ID mid, VALUE (*func)(ANYARGS), int argc)
{
rb_add_method_cfunc(klass, mid, func, argc, NOEX_PUBLIC);
}
void
rb_define_method(VALUE klass, const char *name, VALUE (*func)(ANYARGS), int argc)
{
rb_add_method_cfunc(klass, rb_intern(name), func, argc, NOEX_PUBLIC);
}
void
rb_define_protected_method(VALUE klass, const char *name, VALUE (*func)(ANYARGS), int argc)
{
rb_add_method_cfunc(klass, rb_intern(name), func, argc, NOEX_PROTECTED);
}
void
rb_define_private_method(VALUE klass, const char *name, VALUE (*func)(ANYARGS), int argc)
{
rb_add_method_cfunc(klass, rb_intern(name), func, argc, NOEX_PRIVATE);
}
void
rb_undef_method(VALUE klass, const char *name)
{
rb_add_method(klass, rb_intern(name), VM_METHOD_TYPE_UNDEF, 0, NOEX_UNDEF);
}
/*!
* \}
*/
/*!
* \addtogroup class
* \{
*/
#define SPECIAL_SINGLETON(x,c) do {\
if (obj == (x)) {\
return (c);\
}\
} while (0)
/*!
* \internal
* Returns the singleton class of \a obj. Creates it if necessary.
*
* \note DO NOT expose the returned singleton class to
* outside of class.c.
* Use \ref rb_singleton_class instead for
* consistency of the metaclass hierarchy.
*/
static VALUE
singleton_class_of(VALUE obj)
{
VALUE klass;
if (FIXNUM_P(obj) || SYMBOL_P(obj)) {
rb_raise(rb_eTypeError, "can't define singleton");
}
if (rb_special_const_p(obj)) {
SPECIAL_SINGLETON(Qnil, rb_cNilClass);
SPECIAL_SINGLETON(Qfalse, rb_cFalseClass);
SPECIAL_SINGLETON(Qtrue, rb_cTrueClass);
rb_bug("unknown immediate %p", (void *)obj);
}
if (FL_TEST(RBASIC(obj)->klass, FL_SINGLETON) &&
rb_ivar_get(RBASIC(obj)->klass, id_attached) == obj) {
klass = RBASIC(obj)->klass;
}
else {
klass = rb_make_metaclass(obj, RBASIC(obj)->klass);
}
if (OBJ_TAINTED(obj)) {
OBJ_TAINT(klass);
}
else {
FL_UNSET(klass, FL_TAINT);
}
if (OBJ_UNTRUSTED(obj)) {
OBJ_UNTRUST(klass);
}
else {
FL_UNSET(klass, FL_UNTRUSTED);
}
if (OBJ_FROZEN(obj)) OBJ_FREEZE(klass);
return klass;
}
/*!
* Returns the singleton class of \a obj. Creates it if necessary.
*
* \param obj an arbitrary object.
* \throw TypeError if \a obj is a Fixnum or a Symbol.
* \return the singleton class.
*
* \post \a obj has its own singleton class.
* \post if \a obj is a class,
* the returned singleton class also has its own
* singleton class in order to keep consistency of the
* inheritance structure of metaclasses.
* \note a new singleton class will be created
* if \a obj does not have it.
* \note the singleton classes for nil, true and false are:
* NilClass, TrueClass and FalseClass.
*/
VALUE
rb_singleton_class(VALUE obj)
{
VALUE klass = singleton_class_of(obj);
/* ensures an exposed class belongs to its own eigenclass */
if (RB_TYPE_P(obj, T_CLASS)) (void)ENSURE_EIGENCLASS(klass);
return klass;
}
/*!
* \}
*/
/*!
* \addtogroup defmethod
* \{
*/
/*!
* Defines a singleton method for \a obj.
* \param obj an arbitrary object
* \param name name of the singleton method
* \param func the method body
* \param argc the number of parameters, or -1 or -2. see \ref defmethod.
*/
void
rb_define_singleton_method(VALUE obj, const char *name, VALUE (*func)(ANYARGS), int argc)
{
rb_define_method(singleton_class_of(obj), name, func, argc);
}
/*!
* Defines a module function for \a module.
* \param module an module or a class.
* \param name name of the function
* \param func the method body
* \param argc the number of parameters, or -1 or -2. see \ref defmethod.
*/
void
rb_define_module_function(VALUE module, const char *name, VALUE (*func)(ANYARGS), int argc)
{
rb_define_private_method(module, name, func, argc);
rb_define_singleton_method(module, name, func, argc);
}
/*!
* Defines a global function
* \param name name of the function
* \param func the method body
* \param argc the number of parameters, or -1 or -2. see \ref defmethod.
*/
void
rb_define_global_function(const char *name, VALUE (*func)(ANYARGS), int argc)
{
rb_define_module_function(rb_mKernel, name, func, argc);
}
/*!
* Defines an alias of a method.
* \param klass the class which the original method belongs to
* \param name1 a new name for the method
* \param name2 the original name of the method
*/
void
rb_define_alias(VALUE klass, const char *name1, const char *name2)
{
rb_alias(klass, rb_intern(name1), rb_intern(name2));
}
/*!
* Defines (a) public accessor method(s) for an attribute.
* \param klass the class which the attribute will belongs to
* \param name name of the attribute
* \param read a getter method for the attribute will be defined if \a read is non-zero.
* \param write a setter method for the attribute will be defined if \a write is non-zero.
*/
void
rb_define_attr(VALUE klass, const char *name, int read, int write)
{
rb_attr(klass, rb_intern(name), read, write, FALSE);
}
int
rb_obj_basic_to_s_p(VALUE obj)
{
const rb_method_entry_t *me = rb_method_entry(CLASS_OF(obj), rb_intern("to_s"));
if (me && me->def && me->def->type == VM_METHOD_TYPE_CFUNC &&
me->def->body.cfunc.func == rb_any_to_s)
return 1;
return 0;
}
#include <stdarg.h>
int
rb_scan_args(int argc, const VALUE *argv, const char *fmt, ...)
{
int i;
const char *p = fmt;
VALUE *var;
va_list vargs;
int f_var = 0, f_hash = 0, f_block = 0;
int n_lead = 0, n_opt = 0, n_trail = 0, n_mand;
int argi = 0;
VALUE hash = Qnil;
if (ISDIGIT(*p)) {
n_lead = *p - '0';
p++;
if (ISDIGIT(*p)) {
n_opt = *p - '0';
p++;
if (ISDIGIT(*p)) {
n_trail = *p - '0';
p++;
goto block_arg;
}
}
}
if (*p == '*') {
f_var = 1;
p++;
if (ISDIGIT(*p)) {
n_trail = *p - '0';
p++;
}
}
block_arg:
if (*p == ':') {
f_hash = 1;
p++;
}
if (*p == '&') {
f_block = 1;
p++;
}
if (*p != '\0') {
rb_fatal("bad scan arg format: %s", fmt);
}
n_mand = n_lead + n_trail;
if (argc < n_mand)
goto argc_error;
va_start(vargs, fmt);
/* capture an option hash - phase 1: pop */
if (f_hash && n_mand < argc) {
VALUE last = argv[argc - 1];
if (NIL_P(last)) {
/* nil is taken as an empty option hash only if it is not
ambiguous; i.e. '*' is not specified and arguments are
given more than sufficient */
if (!f_var && n_mand + n_opt < argc)
argc--;
}
else {
hash = rb_check_convert_type(last, T_HASH, "Hash", "to_hash");
if (!NIL_P(hash))
argc--;
}
}
/* capture leading mandatory arguments */
for (i = n_lead; i-- > 0; ) {
var = va_arg(vargs, VALUE *);
if (var) *var = argv[argi];
argi++;
}
/* capture optional arguments */
for (i = n_opt; i-- > 0; ) {
var = va_arg(vargs, VALUE *);
if (argi < argc - n_trail) {
if (var) *var = argv[argi];
argi++;
}
else {
if (var) *var = Qnil;
}
}
/* capture variable length arguments */
if (f_var) {
int n_var = argc - argi - n_trail;
var = va_arg(vargs, VALUE *);
if (0 < n_var) {
if (var) *var = rb_ary_new4(n_var, &argv[argi]);
argi += n_var;
}
else {
if (var) *var = rb_ary_new();
}
}
/* capture trailing mandatory arguments */
for (i = n_trail; i-- > 0; ) {
var = va_arg(vargs, VALUE *);
if (var) *var = argv[argi];
argi++;
}
/* capture an option hash - phase 2: assignment */
if (f_hash) {
var = va_arg(vargs, VALUE *);
if (var) *var = hash;
}
/* capture iterator block */
if (f_block) {
var = va_arg(vargs, VALUE *);
if (rb_block_given_p()) {
*var = rb_block_proc();
}
else {
*var = Qnil;
}
}
va_end(vargs);
if (argi < argc) {
argc_error:
rb_error_arity(argc, n_mand, f_var ? UNLIMITED_ARGUMENTS : n_mand + n_opt);
}
return argc;
}
/*!
* \}
*/
Jump to Line
Something went wrong with that request. Please try again.