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/* -*-c-*- */
/*
* This file is included by vm_eval.c
*/
#define CACHE_SIZE 0x800
#define CACHE_MASK 0x7ff
#define EXPR1(c,m) ((((c)>>3)^(m))&CACHE_MASK)
static void rb_vm_check_redefinition_opt_method(const NODE *node);
static ID __send__, object_id;
static ID removed, singleton_removed, undefined, singleton_undefined;
static ID eqq, each, aref, aset, match, missing;
static ID added, singleton_added;
struct cache_entry { /* method hash table. */
ID mid; /* method's id */
ID mid0; /* method's original id */
VALUE klass; /* receiver's class */
VALUE oklass; /* original's class */
NODE *method;
};
static struct cache_entry cache[CACHE_SIZE];
#define ruby_running (GET_VM()->running)
/* int ruby_running = 0; */
VALUE enable_method_added;
void
rb_clear_cache(void)
{
struct cache_entry *ent, *end;
rb_vm_change_state();
if (!ruby_running)
return;
ent = cache;
end = ent + CACHE_SIZE;
while (ent < end) {
ent->mid = 0;
ent++;
}
}
static void
rb_clear_cache_for_undef(VALUE klass, ID id)
{
struct cache_entry *ent, *end;
rb_vm_change_state();
if (!ruby_running)
return;
ent = cache;
end = ent + CACHE_SIZE;
while (ent < end) {
if (ent->oklass == klass && ent->mid == id) {
ent->mid = 0;
}
ent++;
}
}
#if !WITH_OBJC
static void
rb_clear_cache_by_id(ID id)
{
struct cache_entry *ent, *end;
rb_vm_change_state();
if (!ruby_running)
return;
ent = cache;
end = ent + CACHE_SIZE;
while (ent < end) {
if (ent->mid == id) {
ent->mid = 0;
}
ent++;
}
}
#endif
void
rb_clear_cache_by_class(VALUE klass)
{
struct cache_entry *ent, *end;
rb_vm_change_state();
if (!ruby_running)
return;
ent = cache;
end = ent + CACHE_SIZE;
while (ent < end) {
if (ent->klass == klass || ent->oklass == klass) {
ent->mid = 0;
}
ent++;
}
}
void
rb_add_method(VALUE klass, ID mid, NODE * node, int noex)
{
NODE *body;
if (NIL_P(klass) || klass == 0) {
klass = rb_cObject;
}
if (rb_safe_level() >= 4 && (klass == rb_cObject || !OBJ_TAINTED(klass))) {
rb_raise(rb_eSecurityError, "Insecure: can't define method");
}
if (!RCLASS_SINGLETON(klass) &&
node && nd_type(node) != NODE_ZSUPER &&
(mid == rb_intern("initialize") || mid == rb_intern("initialize_copy"))) {
noex = NOEX_PRIVATE | noex;
}
else if (RCLASS_SINGLETON(klass) && node
&& nd_type(node) == NODE_CFUNC && mid == rb_intern("allocate")) {
rb_warn
("defining %s.allocate is deprecated; use rb_define_alloc_func()",
rb_class2name(rb_iv_get(klass, "__attached__")));
mid = ID_ALLOCATOR;
}
if (OBJ_FROZEN(klass)) {
rb_error_frozen("class/module");
}
#if !WITH_OBJC
rb_clear_cache_by_id(mid);
#endif
/*
* NODE_METHOD (NEW_METHOD(body, klass, vis)):
* nd_body : method body // (2) // mark
* nd_clss : klass // (1) // mark
* nd_noex : visibility // (3)
*
* NODE_FBODY (NEW_FBODY(method, alias)):
* nd_body : method (NODE_METHOD) // (2) // mark
* nd_oid : original id // (1)
* nd_cnt : alias count // (3)
*/
if (node) {
body = NEW_FBODY(NEW_METHOD(node, klass, NOEX_WITH_SAFE(noex)), 0);
}
else {
body = 0;
}
#if !WITH_OBJC // TODO
{
/* check re-definition */
st_data_t data;
NODE *old_node;
if (st_lookup(RCLASS_M_TBL(klass), mid, &data)) {
old_node = (NODE *)data;
if (old_node) {
if (nd_type(old_node->nd_body->nd_body) == NODE_CFUNC) {
rb_vm_check_redefinition_opt_method(old_node);
}
if (RTEST(ruby_verbose) && node && old_node->nd_cnt == 0 && old_node->nd_body) {
rb_warning("method redefined; discarding old %s", rb_id2name(mid));
}
}
}
if (klass == rb_cObject && node && mid == idInitialize) {
rb_warn("redefining Object#initialize may cause infinite loop");
}
if (mid == object_id || mid == __send__) {
if (node && nd_type(node) == RUBY_VM_METHOD_NODE) {
rb_warn("redefining `%s' may cause serious problem",
rb_id2name(mid));
}
}
}
#endif
#if WITH_OBJC
rb_objc_register_ruby_method(klass, mid, body != NULL ? body->nd_body : NULL);
#else
st_insert(RCLASS_M_TBL(klass), mid, (st_data_t) body);
#endif
if (node && mid != ID_ALLOCATOR && ruby_running && enable_method_added == Qtrue) {
if (RCLASS_SINGLETON(klass)) {
rb_funcall(rb_iv_get(klass, "__attached__"), singleton_added, 1,
ID2SYM(mid));
}
else {
rb_funcall(klass, added, 1, ID2SYM(mid));
}
}
}
void
rb_define_alloc_func(VALUE klass, VALUE (*func)(VALUE))
{
Check_Type(klass, T_CLASS);
rb_add_method(rb_singleton_class(klass), ID_ALLOCATOR, NEW_CFUNC(func, 0),
NOEX_PUBLIC);
}
void
rb_undef_alloc_func(VALUE klass)
{
Check_Type(klass, T_CLASS);
rb_add_method(rb_singleton_class(klass), ID_ALLOCATOR, 0, NOEX_UNDEF);
}
rb_alloc_func_t
rb_get_alloc_func(VALUE klass)
{
NODE *n;
Check_Type(klass, T_CLASS);
n = rb_method_node(CLASS_OF(klass), ID_ALLOCATOR);
if (!n) return 0;
if (nd_type(n) != NODE_METHOD) return 0;
n = n->nd_body;
if (nd_type(n) != NODE_CFUNC) return 0;
return (rb_alloc_func_t)n->nd_cfnc;
}
static NODE *
search_method(VALUE klass, ID id, VALUE *klassp)
{
#if WITH_OBJC
NODE *node;
if (klass == 0)
return NULL;
node = rb_method_node(klass, id);
if (node != NULL) {
if (klassp != NULL) /* TODO honour klassp */
*klassp = klass;
}
return node;
#else
st_data_t body;
if (!klass) {
return 0;
}
while (!st_lookup(RCLASS_M_TBL(klass), id, &body)) {
klass = RCLASS_SUPER(klass);
if (!klass)
return 0;
}
if (klassp) {
*klassp = klass;
}
return (NODE *)body;
#endif
}
/*
* search method body (NODE_METHOD)
* with : klass and id
* without : method cache
*
* if you need method node with method cache, use
* rb_method_node()
*/
NODE *
rb_get_method_body(VALUE klass, ID id, ID *idp)
{
#if WITH_OBJC
return search_method(klass, id, NULL);
#else
NODE *volatile fbody, *body;
NODE *method;
if ((fbody = search_method(klass, id, 0)) == 0 || !fbody->nd_body) {
/* store empty info in cache */
struct cache_entry *ent;
ent = cache + EXPR1(klass, id);
ent->klass = klass;
ent->mid = ent->mid0 = id;
ent->method = 0;
ent->oklass = 0;
return 0;
}
method = fbody->nd_body;
if (ruby_running) {
/* store in cache */
struct cache_entry *ent;
ent = cache + EXPR1(klass, id);
ent->klass = klass;
ent->mid = id;
ent->mid0 = fbody->nd_oid;
ent->method = body = method;
ent->oklass = method->nd_clss;
}
else {
body = method;
}
if (idp) {
*idp = fbody->nd_oid;
}
return body;
#endif
}
NODE *
rb_method_node(VALUE klass, ID id)
{
#if WITH_OBJC
NODE *node = rb_objc_method_node(klass, id, NULL, NULL);
if (node == NULL && id != ID_ALLOCATOR) {
const char *id_str = rb_id2name(id);
size_t slen = strlen(id_str);
if (strcmp(id_str, "retain") == 0
|| strcmp(id_str, "release") == 0
|| strcmp(id_str, "zone") == 0) {
char buf[100];
snprintf(buf, sizeof buf, "__rb_%s__", id_str);
return rb_method_node(klass, rb_intern(buf));
}
else {
if (id_str[slen - 1] == ':') {
return NULL;
}
else {
char buf[100];
snprintf(buf, sizeof buf, "%s:", id_str);
return rb_method_node(klass, rb_intern(buf));
}
}
}
return node;
#else
struct cache_entry *ent;
ent = cache + EXPR1(klass, id);
if (ent->mid == id && ent->klass == klass && ent->method) {
return ent->method;
}
return rb_get_method_body(klass, id, 0);
#endif
}
static void
remove_method(VALUE klass, ID mid)
{
#if !WITH_OBJC
st_data_t data;
#endif
NODE *body = 0;
if (klass == rb_cObject) {
rb_secure(4);
}
if (rb_safe_level() >= 4 && !OBJ_TAINTED(klass)) {
rb_raise(rb_eSecurityError, "Insecure: can't remove method");
}
if (OBJ_FROZEN(klass))
rb_error_frozen("class/module");
if (mid == object_id || mid == __send__ || mid == idInitialize) {
rb_warn("removing `%s' may cause serious problem", rb_id2name(mid));
}
#if WITH_OBJC
SEL sel;
Method m;
sel = sel_registerName(rb_id2name(mid));
m = class_getInstanceMethod((Class)klass, sel);
if (m == NULL) {
char buf[100];
size_t len = strlen((char *)sel);
if (((char *)sel)[len - 1] != ':') {
snprintf(buf, sizeof buf, "%s:", (char *)sel);
sel = sel_registerName(buf);
m = class_getInstanceMethod((Class)klass, sel);
}
}
if (m == NULL) {
rb_name_error(mid, "method `%s' not defined in %s",
rb_id2name(mid), rb_class2name(klass));
}
if (rb_objc_method_node3(method_getImplementation(m)) == NULL) {
rb_warn("removing pure Objective-C method `%s' may cause serious problem", rb_id2name(mid));
}
method_setImplementation(m, NULL);
#else
if (st_lookup(RCLASS_M_TBL(klass), mid, &data)) {
body = (NODE *)data;
if (!body || !body->nd_body) body = 0;
else {
st_delete(RCLASS_M_TBL(klass), &mid, &data);
}
}
if (!body) {
rb_name_error(mid, "method `%s' not defined in %s",
rb_id2name(mid), rb_class2name(klass));
}
#endif
if (nd_type(body->nd_body->nd_body) == NODE_CFUNC) {
rb_vm_check_redefinition_opt_method(body);
}
rb_clear_cache_for_undef(klass, mid);
if (RCLASS_SINGLETON(klass)) {
rb_funcall(rb_iv_get(klass, "__attached__"), singleton_removed, 1,
ID2SYM(mid));
}
else {
rb_funcall(klass, removed, 1, ID2SYM(mid));
}
}
void
rb_remove_method(VALUE klass, const char *name)
{
remove_method(klass, rb_intern(name));
}
/*
* call-seq:
* remove_method(symbol) => self
*
* Removes the method identified by _symbol_ from the current
* class. For an example, see <code>Module.undef_method</code>.
*/
static VALUE
rb_mod_remove_method(int argc, VALUE *argv, VALUE mod)
{
int i;
for (i = 0; i < argc; i++) {
remove_method(mod, rb_to_id(argv[i]));
}
return mod;
}
#undef rb_disable_super
#undef rb_enable_super
void
rb_disable_super(VALUE klass, const char *name)
{
/* obsolete - no use */
}
void
rb_enable_super(VALUE klass, const char *name)
{
rb_warning("rb_enable_super() is obsolete");
}
static void
rb_export_method(VALUE klass, ID name, ID noex)
{
NODE *fbody;
VALUE origin;
if (klass == rb_cObject) {
rb_secure(4);
}
#if WITH_OBJC
fbody = rb_method_node(klass, name);
if (fbody == NULL && TYPE(klass) == T_MODULE) {
fbody = rb_method_node(rb_cObject, name);
origin = rb_method_node(rb_cObject, name) == fbody
? rb_cObject : klass;
}
else {
origin = rb_method_node(RCLASS_SUPER(klass), name) == fbody
? RCLASS_SUPER(klass) : klass;
}
if (fbody == NULL) {
rb_print_undef(klass, name, 0);
}
if (fbody->nd_noex != noex) {
if (nd_type(fbody->nd_body) == NODE_CFUNC) {
rb_vm_check_redefinition_opt_method(fbody);
}
if (klass == origin) {
fbody->nd_noex = noex;
}
else {
rb_add_method(klass, name, NEW_ZSUPER(), noex);
}
}
#else
fbody = search_method(klass, name, &origin);
if (!fbody && TYPE(klass) == T_MODULE) {
fbody = search_method(rb_cObject, name, &origin);
}
if (!fbody || !fbody->nd_body) {
rb_print_undef(klass, name, 0);
}
if (fbody->nd_body->nd_noex != noex) {
if (nd_type(fbody->nd_body->nd_body) == NODE_CFUNC) {
rb_vm_check_redefinition_opt_method(fbody);
}
if (klass == origin) {
fbody->nd_body->nd_noex = noex;
}
else {
rb_add_method(klass, name, NEW_ZSUPER(), noex);
}
}
#endif
}
int
rb_method_boundp(VALUE klass, ID id, int ex)
{
NODE *method;
if ((method = rb_method_node(klass, id)) != 0) {
if (ex && (method->nd_noex & NOEX_PRIVATE)) {
return Qfalse;
}
return Qtrue;
}
return Qfalse;
}
void
rb_attr(VALUE klass, ID id, int read, int write, int ex)
{
const char *name;
ID attriv;
int noex;
if (!ex) {
noex = NOEX_PUBLIC;
}
else {
if (SCOPE_TEST(NOEX_PRIVATE)) {
noex = NOEX_PRIVATE;
rb_warning((SCOPE_CHECK(NOEX_MODFUNC)) ?
"attribute accessor as module_function" :
"private attribute?");
}
else if (SCOPE_TEST(NOEX_PROTECTED)) {
noex = NOEX_PROTECTED;
}
else {
noex = NOEX_PUBLIC;
}
}
if (!rb_is_local_id(id) && !rb_is_const_id(id)) {
rb_name_error(id, "invalid attribute name `%s'", rb_id2name(id));
}
name = rb_id2name(id);
if (!name) {
rb_raise(rb_eArgError, "argument needs to be symbol or string");
}
attriv = rb_intern_str(rb_sprintf("@%s", name));
if (read) {
rb_add_method(klass, id, NEW_IVAR(attriv), noex);
}
if (write) {
rb_add_method(klass, rb_id_attrset(id), NEW_ATTRSET(attriv), noex);
#if WITH_OBJC
rb_objc_define_kvo_setter(klass, id);
#endif
}
}
void
rb_undef(VALUE klass, ID id)
{
VALUE origin;
NODE *body;
if (rb_vm_cbase() == rb_cObject && klass == rb_cObject) {
rb_secure(4);
}
if (rb_safe_level() >= 4 && !OBJ_TAINTED(klass)) {
rb_raise(rb_eSecurityError, "Insecure: can't undef `%s'",
rb_id2name(id));
}
rb_frozen_class_p(klass);
if (id == object_id || id == __send__ || id == idInitialize) {
rb_warn("undefining `%s' may cause serious problem", rb_id2name(id));
}
/* TODO: warn if a very important method of NSObject is undefined
* by default, pure objc methods are not exposed by introspections API
*/
body = search_method(klass, id, &origin);
if (!body || !body->nd_body) {
const char *s0 = " class";
VALUE c = klass;
if (RCLASS_SINGLETON(c)) {
VALUE obj = rb_iv_get(klass, "__attached__");
switch (TYPE(obj)) {
case T_MODULE:
case T_CLASS:
c = obj;
s0 = "";
}
}
else if (TYPE(c) == T_MODULE) {
s0 = " module";
}
rb_name_error(id, "undefined method `%s' for%s `%s'",
rb_id2name(id), s0, rb_class2name(c));
}
rb_add_method(klass, id, 0, NOEX_PUBLIC);
if (RCLASS_SINGLETON(klass)) {
rb_funcall(rb_iv_get(klass, "__attached__"),
singleton_undefined, 1, ID2SYM(id));
}
else {
rb_funcall(klass, undefined, 1, ID2SYM(id));
}
}
/*
* call-seq:
* undef_method(symbol) => self
*
* Prevents the current class from responding to calls to the named
* method. Contrast this with <code>remove_method</code>, which deletes
* the method from the particular class; Ruby will still search
* superclasses and mixed-in modules for a possible receiver.
*
* class Parent
* def hello
* puts "In parent"
* end
* end
* class Child < Parent
* def hello
* puts "In child"
* end
* end
*
*
* c = Child.new
* c.hello
*
*
* class Child
* remove_method :hello # remove from child, still in parent
* end
* c.hello
*
*
* class Child
* undef_method :hello # prevent any calls to 'hello'
* end
* c.hello
*
* <em>produces:</em>
*
* In child
* In parent
* prog.rb:23: undefined method `hello' for #<Child:0x401b3bb4> (NoMethodError)
*/
static VALUE
rb_mod_undef_method(int argc, VALUE *argv, VALUE mod)
{
int i;
for (i = 0; i < argc; i++) {
rb_undef(mod, rb_to_id(argv[i]));
}
return mod;
}
/*
* call-seq:
* mod.method_defined?(symbol) => true or false
*
* Returns +true+ if the named method is defined by
* _mod_ (or its included modules and, if _mod_ is a class,
* its ancestors). Public and protected methods are matched.
*
* module A
* def method1() end
* end
* class B
* def method2() end
* end
* class C < B
* include A
* def method3() end
* end
*
* A.method_defined? :method1 #=> true
* C.method_defined? "method1" #=> true
* C.method_defined? "method2" #=> true
* C.method_defined? "method3" #=> true
* C.method_defined? "method4" #=> false
*/
static VALUE
rb_mod_method_defined(VALUE mod, VALUE mid)
{
return rb_method_boundp(mod, rb_to_id(mid), 1);
}
#define VISI_CHECK(x,f) (((x)&NOEX_MASK) == (f))
/*
* call-seq:
* mod.public_method_defined?(symbol) => true or false
*
* Returns +true+ if the named public method is defined by
* _mod_ (or its included modules and, if _mod_ is a class,
* its ancestors).
*
* module A
* def method1() end
* end
* class B
* protected
* def method2() end
* end
* class C < B
* include A
* def method3() end
* end
*
* A.method_defined? :method1 #=> true
* C.public_method_defined? "method1" #=> true
* C.public_method_defined? "method2" #=> false
* C.method_defined? "method2" #=> true
*/
static VALUE
rb_mod_public_method_defined(VALUE mod, VALUE mid)
{
ID id = rb_to_id(mid);
NODE *method;
method = rb_method_node(mod, id);
if (method) {
if (VISI_CHECK(method->nd_noex, NOEX_PUBLIC))
return Qtrue;
}
return Qfalse;
}
/*
* call-seq:
* mod.private_method_defined?(symbol) => true or false
*
* Returns +true+ if the named private method is defined by
* _ mod_ (or its included modules and, if _mod_ is a class,
* its ancestors).
*
* module A
* def method1() end
* end
* class B
* private
* def method2() end
* end
* class C < B
* include A
* def method3() end
* end
*
* A.method_defined? :method1 #=> true
* C.private_method_defined? "method1" #=> false
* C.private_method_defined? "method2" #=> true
* C.method_defined? "method2" #=> false
*/
static VALUE
rb_mod_private_method_defined(VALUE mod, VALUE mid)
{
ID id = rb_to_id(mid);
NODE *method;
method = rb_method_node(mod, id);
if (method) {
if (VISI_CHECK(method->nd_noex, NOEX_PRIVATE))
return Qtrue;
}
return Qfalse;
}
/*
* call-seq:
* mod.protected_method_defined?(symbol) => true or false
*
* Returns +true+ if the named protected method is defined
* by _mod_ (or its included modules and, if _mod_ is a
* class, its ancestors).
*
* module A
* def method1() end
* end
* class B
* protected
* def method2() end
* end
* class C < B
* include A
* def method3() end
* end
*
* A.method_defined? :method1 #=> true
* C.protected_method_defined? "method1" #=> false
* C.protected_method_defined? "method2" #=> true
* C.method_defined? "method2" #=> true
*/
static VALUE
rb_mod_protected_method_defined(VALUE mod, VALUE mid)
{
ID id = rb_to_id(mid);
NODE *method;
method = rb_method_node(mod, id);
if (method) {
if (VISI_CHECK(method->nd_noex, NOEX_PROTECTED))
return Qtrue;
}
return Qfalse;
}
void
rb_alias(VALUE klass, ID name, ID def)
{
#if !WITH_OBJC
NODE *orig_fbody, *node;
st_data_t data;
#endif
VALUE singleton = 0;
rb_frozen_class_p(klass);
if (klass == rb_cObject) {
rb_secure(4);
}
#if WITH_OBJC
if (RCLASS_SINGLETON(klass)) {
singleton = rb_iv_get(klass, "__attached__");
}
rb_objc_alias(klass, name, def);
#else
orig_fbody = search_method(klass, def, 0);
if (!orig_fbody || !orig_fbody->nd_body) {
if (TYPE(klass) == T_MODULE) {
orig_fbody = search_method(rb_cObject, def, 0);
}
}
if (!orig_fbody || !orig_fbody->nd_body) {
rb_print_undef(klass, def, 0);
}
if (FL_TEST(klass, FL_SINGLETON)) {
singleton = rb_iv_get(klass, "__attached__");
}
orig_fbody->nd_cnt++;
if (st_lookup(RCLASS_M_TBL(klass), name, &data)) {
node = (NODE *)data;
if (node) {
if (RTEST(ruby_verbose) && node->nd_cnt == 0 && node->nd_body) {
rb_warning("discarding old %s", rb_id2name(name));
}
if (nd_type(node->nd_body->nd_body) == NODE_CFUNC) {
rb_vm_check_redefinition_opt_method(node);
}
}
}
st_insert(RCLASS_M_TBL(klass), name,
(st_data_t) NEW_FBODY(
NEW_METHOD(orig_fbody->nd_body->nd_body,
orig_fbody->nd_body->nd_clss,
NOEX_WITH_SAFE(orig_fbody->nd_body->nd_noex)), def));
rb_clear_cache_by_id(name);
#endif
if (!ruby_running) return;
if (singleton) {
rb_funcall(singleton, singleton_added, 1, ID2SYM(name));
}
else {
rb_funcall(klass, added, 1, ID2SYM(name));
}
}
/*
* call-seq:
* alias_method(new_name, old_name) => self
*
* Makes <i>new_name</i> a new copy of the method <i>old_name</i>. This can
* be used to retain access to methods that are overridden.
*
* module Mod
* alias_method :orig_exit, :exit
* def exit(code=0)
* puts "Exiting with code #{code}"
* orig_exit(code)
* end
* end
* include Mod
* exit(99)
*
* <em>produces:</em>
*
* Exiting with code 99
*/
static VALUE
rb_mod_alias_method(VALUE mod, VALUE newname, VALUE oldname)
{
rb_alias(mod, rb_to_id(newname), rb_to_id(oldname));
return mod;
}
static void
secure_visibility(VALUE self)
{
if (rb_safe_level() >= 4 && !OBJ_TAINTED(self)) {
rb_raise(rb_eSecurityError,
"Insecure: can't change method visibility");
}
}
static void
set_method_visibility(VALUE self, int argc, VALUE *argv, ID ex)
{
int i;
secure_visibility(self);
for (i = 0; i < argc; i++) {
rb_export_method(self, rb_to_id(argv[i]), ex);
}
rb_clear_cache_by_class(self);
}
/*
* call-seq:
* public => self
* public(symbol, ...) => self
*
* With no arguments, sets the default visibility for subsequently
* defined methods to public. With arguments, sets the named methods to
* have public visibility.
*/
static VALUE
rb_mod_public(int argc, VALUE *argv, VALUE module)
{
secure_visibility(module);
if (argc == 0) {
SCOPE_SET(NOEX_PUBLIC);
}
else {
set_method_visibility(module, argc, argv, NOEX_PUBLIC);
}
return module;
}
/*
* call-seq:
* protected => self
* protected(symbol, ...) => self
*
* With no arguments, sets the default visibility for subsequently
* defined methods to protected. With arguments, sets the named methods
* to have protected visibility.
*/
static VALUE
rb_mod_protected(int argc, VALUE *argv, VALUE module)
{
secure_visibility(module);
if (argc == 0) {
SCOPE_SET(NOEX_PROTECTED);
}
else {
set_method_visibility(module, argc, argv, NOEX_PROTECTED);
}
return module;
}
/*
* call-seq:
* private => self
* private(symbol, ...) => self
*
* With no arguments, sets the default visibility for subsequently
* defined methods to private. With arguments, sets the named methods
* to have private visibility.
*
* module Mod
* def a() end
* def b() end
* private
* def c() end
* private :a
* end
* Mod.private_instance_methods #=> [:a, :c]
*/
static VALUE
rb_mod_private(int argc, VALUE *argv, VALUE module)
{
secure_visibility(module);
if (argc == 0) {
SCOPE_SET(NOEX_PRIVATE);
}
else {
set_method_visibility(module, argc, argv, NOEX_PRIVATE);
}
return module;
}
/*
* call-seq:
* mod.public_class_method(symbol, ...) => mod
*
* Makes a list of existing class methods public.
*/
static VALUE
rb_mod_public_method(int argc, VALUE *argv, VALUE obj)
{
set_method_visibility(CLASS_OF(obj), argc, argv, NOEX_PUBLIC);
return obj;
}
/*
* call-seq:
* mod.private_class_method(symbol, ...) => mod
*
* Makes existing class methods private. Often used to hide the default
* constructor <code>new</code>.
*
* class SimpleSingleton # Not thread safe
* private_class_method :new
* def SimpleSingleton.create(*args, &block)
* @me = new(*args, &block) if ! @me
* @me
* end
* end
*/
static VALUE
rb_mod_private_method(int argc, VALUE *argv, VALUE obj)
{
set_method_visibility(CLASS_OF(obj), argc, argv, NOEX_PRIVATE);
return obj;
}
/*
* call-seq:
* public
* public(symbol, ...)
*
* With no arguments, sets the default visibility for subsequently
* defined methods to public. With arguments, sets the named methods to
* have public visibility.
*/
static VALUE
top_public(int argc, VALUE *argv)
{
return rb_mod_public(argc, argv, rb_cObject);
}
static VALUE
top_private(int argc, VALUE *argv)
{
return rb_mod_private(argc, argv, rb_cObject);
}
/*
* call-seq:
* module_function(symbol, ...) => self
*
* Creates module functions for the named methods. These functions may
* be called with the module as a receiver, and also become available
* as instance methods to classes that mix in the module. Module
* functions are copies of the original, and so may be changed
* independently. The instance-method versions are made private. If
* used with no arguments, subsequently defined methods become module
* functions.
*
* module Mod
* def one
* "This is one"
* end
* module_function :one
* end
* class Cls
* include Mod
* def callOne
* one
* end
* end
* Mod.one #=> "This is one"
* c = Cls.new
* c.callOne #=> "This is one"
* module Mod
* def one
* "This is the new one"
* end
* end
* Mod.one #=> "This is one"
* c.callOne #=> "This is the new one"
*/
static VALUE
rb_mod_modfunc(int argc, VALUE *argv, VALUE module)
{
int i;
ID id;
NODE *fbody;
if (TYPE(module) != T_MODULE) {
rb_raise(rb_eTypeError, "module_function must be called for modules");
}
secure_visibility(module);
if (argc == 0) {
SCOPE_SET(NOEX_MODFUNC);
return module;
}
set_method_visibility(module, argc, argv, NOEX_PRIVATE);
for (i = 0; i < argc; i++) {
VALUE m = module;
id = rb_to_id(argv[i]);
for (;;) {
fbody = search_method(m, id, &m);
if (fbody == 0) {
fbody = search_method(rb_cObject, id, &m);
}
#if WITH_OBJC
if (fbody == 0) {
rb_bug("undefined method `%s'; can't happen", rb_id2name(id));
}
if (nd_type(fbody->nd_body) != NODE_ZSUPER) {
break; /* normal case: need not to follow 'super' link */
}
#else
if (fbody == 0 || fbody->nd_body == 0) {
rb_bug("undefined method `%s'; can't happen", rb_id2name(id));
}
if (nd_type(fbody->nd_body->nd_body) != NODE_ZSUPER) {
break; /* normal case: need not to follow 'super' link */
}
#endif
m = RCLASS_SUPER(m);
if (!m)
break;
}
#if WITH_OBJC
rb_add_method(rb_singleton_class(module), id, fbody->nd_body,
NOEX_PUBLIC);
#else
rb_add_method(rb_singleton_class(module), id, fbody->nd_body->nd_body,
NOEX_PUBLIC);
#endif
}
return module;
}
/*
* call-seq:
* obj.respond_to?(symbol, include_private=false) => true or false
*
* Returns +true+> if _obj_ responds to the given
* method. Private methods are included in the search only if the
* optional second parameter evaluates to +true+.
*/
static NODE *basic_respond_to = 0;
int
rb_obj_respond_to(VALUE obj, ID id, int priv)
{
VALUE klass = CLASS_OF(obj);
#if WITH_OBJC
IMP imp;
static SEL sel_respondTo = 0;
if (sel_respondTo == 0)
sel_respondTo = sel_registerName("respond_to?:");
if (rb_objc_method_node2(klass, sel_respondTo, NULL) == basic_respond_to) {
NODE *method;
method = rb_objc_method_node(klass, id, &imp, NULL);
if (method != NULL && priv == 0 && (method->nd_noex & NOEX_PRIVATE))
return false;
return imp != NULL;
}
#else
if (rb_method_node(klass, idRespond_to) == basic_respond_to) {
return rb_method_boundp(klass, id, !priv);
}
#endif
else {
VALUE args[2];
int n = 0;
args[n++] = ID2SYM(id);
if (priv)
args[n++] = Qtrue;
return RTEST(rb_funcall2(obj, idRespond_to, n, args));
}
}
int
rb_respond_to(VALUE obj, ID id)
{
return rb_obj_respond_to(obj, id, Qfalse);
}
/*
* call-seq:
* obj.respond_to?(symbol, include_private=false) => true or false
*
* Returns +true+> if _obj_ responds to the given
* method. Private methods are included in the search only if the
* optional second parameter evaluates to +true+.
*/
static VALUE
obj_respond_to(int argc, VALUE *argv, VALUE obj)
{
VALUE mid, priv;
ID id;
rb_scan_args(argc, argv, "11", &mid, &priv);
id = rb_to_id(mid);
#if WITH_OBJC
return rb_obj_respond_to(obj, id, RTEST(priv)) ? Qtrue : Qfalse;
#else
if (rb_method_boundp(CLASS_OF(obj), id, !RTEST(priv))) {
return Qtrue;
}
#endif
return Qfalse;
}
void
Init_eval_method(void)
{
enable_method_added = Qtrue;
rb_define_method(rb_mKernel, "respond_to?", obj_respond_to, -1);
basic_respond_to = rb_method_node(rb_cObject, idRespond_to);
rb_register_mark_object((VALUE)basic_respond_to);
rb_define_private_method(rb_cModule, "remove_method", rb_mod_remove_method, -1);
rb_define_private_method(rb_cModule, "undef_method", rb_mod_undef_method, -1);
rb_define_private_method(rb_cModule, "alias_method", rb_mod_alias_method, 2);
rb_define_private_method(rb_cModule, "public", rb_mod_public, -1);
rb_define_private_method(rb_cModule, "protected", rb_mod_protected, -1);
rb_define_private_method(rb_cModule, "private", rb_mod_private, -1);
rb_define_private_method(rb_cModule, "module_function", rb_mod_modfunc, -1);
rb_define_method(rb_cModule, "method_defined?", rb_mod_method_defined, 1);
rb_define_method(rb_cModule, "public_method_defined?", rb_mod_public_method_defined, 1);
rb_define_method(rb_cModule, "private_method_defined?", rb_mod_private_method_defined, 1);
rb_define_method(rb_cModule, "protected_method_defined?", rb_mod_protected_method_defined, 1);
rb_define_method(rb_cModule, "public_class_method", rb_mod_public_method, -1);
rb_define_method(rb_cModule, "private_class_method", rb_mod_private_method, -1);
rb_define_singleton_method(rb_vm_top_self(), "public", top_public, -1);
rb_define_singleton_method(rb_vm_top_self(), "private", top_private, -1);
object_id = rb_intern("object_id");
__send__ = rb_intern("__send__");
eqq = rb_intern("===");
each = rb_intern("each");
aref = rb_intern("[]");
aset = rb_intern("[]=");
match = rb_intern("=~");
missing = rb_intern("method_missing");
added = rb_intern("method_added");
singleton_added = rb_intern("singleton_method_added");
removed = rb_intern("method_removed");
singleton_removed = rb_intern("singleton_method_removed");
undefined = rb_intern("method_undefined");
singleton_undefined = rb_intern("singleton_method_undefined");
}
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