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-rw-r--r--ruby_1_8_6/class.c1030
1 files changed, 1030 insertions, 0 deletions
diff --git a/ruby_1_8_6/class.c b/ruby_1_8_6/class.c
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index 0000000000..80dc9e4b2d
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+++ b/ruby_1_8_6/class.c
@@ -0,0 +1,1030 @@
+/**********************************************************************
+
+ class.c -
+
+ $Author$
+ $Date$
+ created at: Tue Aug 10 15:05:44 JST 1993
+
+ Copyright (C) 1993-2003 Yukihiro Matsumoto
+
+**********************************************************************/
+
+#include "ruby.h"
+#include "rubysig.h"
+#include "node.h"
+#include "st.h"
+#include <ctype.h>
+
+extern st_table *rb_class_tbl;
+
+VALUE
+rb_class_boot(super)
+ VALUE super;
+{
+ NEWOBJ(klass, struct RClass);
+ OBJSETUP(klass, rb_cClass, T_CLASS);
+
+ klass->super = super;
+ klass->iv_tbl = 0;
+ klass->m_tbl = 0; /* safe GC */
+ klass->m_tbl = st_init_numtable();
+
+ OBJ_INFECT(klass, super);
+ return (VALUE)klass;
+}
+
+VALUE
+rb_class_new(super)
+ VALUE super;
+{
+ Check_Type(super, T_CLASS);
+ if (super == rb_cClass) {
+ rb_raise(rb_eTypeError, "can't make subclass of Class");
+ }
+ if (FL_TEST(super, FL_SINGLETON)) {
+ rb_raise(rb_eTypeError, "can't make subclass of virtual class");
+ }
+ return rb_class_boot(super);
+}
+
+static int
+clone_method(mid, body, tbl)
+ ID mid;
+ NODE *body;
+ st_table *tbl;
+{
+ st_insert(tbl, mid, (st_data_t)NEW_METHOD(body->nd_body, body->nd_noex));
+ return ST_CONTINUE;
+}
+
+/* :nodoc: */
+VALUE
+rb_mod_init_copy(clone, orig)
+ VALUE clone, orig;
+{
+ rb_obj_init_copy(clone, orig);
+ if (!FL_TEST(CLASS_OF(clone), FL_SINGLETON)) {
+ RBASIC(clone)->klass = rb_singleton_class_clone(orig);
+ }
+ RCLASS(clone)->super = RCLASS(orig)->super;
+ if (RCLASS(orig)->iv_tbl) {
+ ID id;
+
+ RCLASS(clone)->iv_tbl = st_copy(RCLASS(orig)->iv_tbl);
+ id = rb_intern("__classpath__");
+ st_delete(RCLASS(clone)->iv_tbl, (st_data_t*)&id, 0);
+ id = rb_intern("__classid__");
+ st_delete(RCLASS(clone)->iv_tbl, (st_data_t*)&id, 0);
+ }
+ if (RCLASS(orig)->m_tbl) {
+ RCLASS(clone)->m_tbl = st_init_numtable();
+ st_foreach(RCLASS(orig)->m_tbl, clone_method,
+ (st_data_t)RCLASS(clone)->m_tbl);
+ }
+
+ return clone;
+}
+
+/* :nodoc: */
+VALUE
+rb_class_init_copy(clone, orig)
+ VALUE clone, orig;
+{
+ if (RCLASS(clone)->super != 0) {
+ 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(obj)
+ VALUE obj;
+{
+ VALUE klass = RBASIC(obj)->klass;
+
+ if (!FL_TEST(klass, FL_SINGLETON))
+ return klass;
+ else {
+ /* copy singleton(unnamed) class */
+ NEWOBJ(clone, struct RClass);
+ OBJSETUP(clone, 0, RBASIC(klass)->flags);
+
+ if (BUILTIN_TYPE(obj) == T_CLASS) {
+ RBASIC(clone)->klass = (VALUE)clone;
+ }
+ else {
+ RBASIC(clone)->klass = rb_singleton_class_clone(klass);
+ }
+
+ clone->super = RCLASS(klass)->super;
+ clone->iv_tbl = 0;
+ clone->m_tbl = 0;
+ if (RCLASS(klass)->iv_tbl) {
+ clone->iv_tbl = st_copy(RCLASS(klass)->iv_tbl);
+ }
+ clone->m_tbl = st_init_numtable();
+ st_foreach(RCLASS(klass)->m_tbl, clone_method,
+ (st_data_t)clone->m_tbl);
+ rb_singleton_class_attached(RBASIC(clone)->klass, (VALUE)clone);
+ FL_SET(clone, FL_SINGLETON);
+ return (VALUE)clone;
+ }
+}
+
+void
+rb_singleton_class_attached(klass, obj)
+ VALUE klass, obj;
+{
+ if (FL_TEST(klass, FL_SINGLETON)) {
+ if (!RCLASS(klass)->iv_tbl) {
+ RCLASS(klass)->iv_tbl = st_init_numtable();
+ }
+ st_insert(RCLASS(klass)->iv_tbl, rb_intern("__attached__"), obj);
+ }
+}
+
+VALUE
+rb_make_metaclass(obj, super)
+ VALUE obj, super;
+{
+ VALUE klass = rb_class_boot(super);
+ FL_SET(klass, FL_SINGLETON);
+ RBASIC(obj)->klass = klass;
+ rb_singleton_class_attached(klass, obj);
+ if (BUILTIN_TYPE(obj) == T_CLASS && FL_TEST(obj, FL_SINGLETON)) {
+ RBASIC(klass)->klass = klass;
+ RCLASS(klass)->super = RBASIC(rb_class_real(RCLASS(obj)->super))->klass;
+ }
+ else {
+ VALUE metasuper = RBASIC(rb_class_real(super))->klass;
+
+ /* metaclass of a superclass may be NULL at boot time */
+ if (metasuper) {
+ RBASIC(klass)->klass = metasuper;
+ }
+ }
+
+ return klass;
+}
+
+VALUE
+rb_define_class_id(id, super)
+ 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;
+}
+
+void
+rb_check_inheritable(super)
+ VALUE super;
+{
+ if (TYPE(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 virtual class");
+ }
+}
+
+VALUE
+rb_class_inherited(super, klass)
+ VALUE super, klass;
+{
+ if (!super) super = rb_cObject;
+ return rb_funcall(super, rb_intern("inherited"), 1, klass);
+}
+
+VALUE
+rb_define_class(name, super)
+ 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 (TYPE(klass) != T_CLASS) {
+ rb_raise(rb_eTypeError, "%s is not a class", name);
+ }
+ if (rb_class_real(RCLASS(klass)->super) != super) {
+ rb_name_error(id, "%s is already defined", 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;
+}
+
+VALUE
+rb_define_class_under(outer, name, super)
+ VALUE outer;
+ const char *name;
+ VALUE super;
+{
+ VALUE klass;
+ ID id;
+
+ id = rb_intern(name);
+ if (rb_const_defined_at(outer, id)) {
+ klass = rb_const_get_at(outer, id);
+ if (TYPE(klass) != T_CLASS) {
+ rb_raise(rb_eTypeError, "%s is not a class", name);
+ }
+ if (rb_class_real(RCLASS(klass)->super) != super) {
+ rb_name_error(id, "%s is already defined", name);
+ }
+ return klass;
+ }
+ if (!super) {
+ rb_warn("no super class for `%s::%s', Object assumed",
+ rb_class2name(outer), name);
+ }
+ klass = rb_define_class_id(id, super);
+ rb_set_class_path(klass, outer, name);
+ rb_const_set(outer, id, klass);
+ rb_class_inherited(super, klass);
+
+ return klass;
+}
+
+VALUE
+rb_module_new()
+{
+ NEWOBJ(mdl, struct RClass);
+ OBJSETUP(mdl, rb_cModule, T_MODULE);
+
+ mdl->super = 0;
+ mdl->iv_tbl = 0;
+ mdl->m_tbl = 0;
+ mdl->m_tbl = st_init_numtable();
+
+ return (VALUE)mdl;
+}
+
+VALUE
+rb_define_module_id(id)
+ ID id;
+{
+ VALUE mdl;
+
+ mdl = rb_module_new();
+ rb_name_class(mdl, id);
+
+ return mdl;
+}
+
+VALUE
+rb_define_module(name)
+ 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 (TYPE(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(outer, name)
+ VALUE outer;
+ const char *name;
+{
+ VALUE module;
+ ID id;
+
+ id = rb_intern(name);
+ if (rb_const_defined_at(outer, id)) {
+ module = rb_const_get_at(outer, id);
+ if (TYPE(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(module, outer, name);
+
+ return module;
+}
+
+static VALUE
+include_class_new(module, super)
+ VALUE module, super;
+{
+ NEWOBJ(klass, struct RClass);
+ OBJSETUP(klass, rb_cClass, T_ICLASS);
+
+ if (BUILTIN_TYPE(module) == T_ICLASS) {
+ module = RBASIC(module)->klass;
+ }
+ if (!RCLASS(module)->iv_tbl) {
+ RCLASS(module)->iv_tbl = st_init_numtable();
+ }
+ klass->iv_tbl = RCLASS(module)->iv_tbl;
+ klass->m_tbl = RCLASS(module)->m_tbl;
+ klass->super = super;
+ if (TYPE(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(klass, module)
+ VALUE klass, module;
+{
+ VALUE p, c;
+ int changed = 0;
+
+ rb_frozen_class_p(klass);
+ if (!OBJ_TAINTED(klass)) {
+ rb_secure(4);
+ }
+
+ if (TYPE(module) != T_MODULE) {
+ Check_Type(module, T_MODULE);
+ }
+
+ OBJ_INFECT(klass, module);
+ c = klass;
+ while (module) {
+ int superclass_seen = Qfalse;
+
+ if (RCLASS(klass)->m_tbl == RCLASS(module)->m_tbl)
+ rb_raise(rb_eArgError, "cyclic include detected");
+ /* ignore if the module included already in superclasses */
+ for (p = RCLASS(klass)->super; p; p = RCLASS(p)->super) {
+ switch (BUILTIN_TYPE(p)) {
+ case T_ICLASS:
+ if (RCLASS(p)->m_tbl == RCLASS(module)->m_tbl) {
+ if (!superclass_seen) {
+ c = p; /* move insertion point */
+ }
+ goto skip;
+ }
+ break;
+ case T_CLASS:
+ superclass_seen = Qtrue;
+ break;
+ }
+ }
+ c = RCLASS(c)->super = include_class_new(module, RCLASS(c)->super);
+ changed = 1;
+ skip:
+ module = RCLASS(module)->super;
+ }
+ if (changed) rb_clear_cache();
+}
+
+/*
+ * 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(mod)
+ VALUE mod;
+{
+ VALUE ary = rb_ary_new();
+ VALUE p;
+
+ for (p = RCLASS(mod)->super; p; p = RCLASS(p)->super) {
+ 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(mod, mod2)
+ VALUE mod;
+ VALUE mod2;
+{
+ VALUE p;
+
+ Check_Type(mod2, T_MODULE);
+ for (p = RCLASS(mod)->super; p; p = RCLASS(p)->super) {
+ 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(mod)
+ VALUE mod;
+{
+ VALUE p, ary = rb_ary_new();
+
+ for (p = mod; p; p = RCLASS(p)->super) {
+ 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(name, type, ary, visi)
+ 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, rb_str_new2(rb_id2name(name)));
+ }
+ return ST_CONTINUE;
+}
+
+static int
+ins_methods_i(name, type, ary)
+ ID name;
+ long type;
+ VALUE ary;
+{
+ return ins_methods_push(name, type, ary, -1); /* everything but private */
+}
+
+static int
+ins_methods_prot_i(name, type, ary)
+ ID name;
+ long type;
+ VALUE ary;
+{
+ return ins_methods_push(name, type, ary, NOEX_PROTECTED);
+}
+
+static int
+ins_methods_priv_i(name, type, ary)
+ ID name;
+ long type;
+ VALUE ary;
+{
+ return ins_methods_push(name, type, ary, NOEX_PRIVATE);
+}
+
+static int
+ins_methods_pub_i(name, type, ary)
+ ID name;
+ long type;
+ VALUE ary;
+{
+ return ins_methods_push(name, type, ary, NOEX_PUBLIC);
+}
+
+static int
+method_entry(key, body, list)
+ ID key;
+ NODE *body;
+ st_table *list;
+{
+ long type;
+
+ if (key == ID_ALLOCATOR) return ST_CONTINUE;
+ if (!st_lookup(list, key, 0)) {
+ if (!body->nd_body) type = -1; /* none */
+ else type = VISI(body->nd_noex);
+ st_add_direct(list, key, type);
+ }
+ return ST_CONTINUE;
+}
+
+static VALUE
+class_instance_method_list(argc, argv, mod, func)
+ int argc;
+ VALUE *argv;
+ VALUE mod;
+ int (*func) _((ID, long, VALUE));
+{
+ VALUE ary;
+ int recur;
+ st_table *list;
+
+ if (argc == 0) {
+ recur = Qtrue;
+ }
+ else {
+ VALUE r;
+ rb_scan_args(argc, argv, "01", &r);
+ recur = RTEST(r);
+ }
+
+ list = st_init_numtable();
+ for (; mod; mod = RCLASS(mod)->super) {
+ st_foreach(RCLASS(mod)->m_tbl, method_entry, (st_data_t)list);
+ if (BUILTIN_TYPE(mod) == T_ICLASS) continue;
+ if (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 public instance methods in
+ * the receiver. For a module, these are the public 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(argc, argv, mod)
+ int argc;
+ VALUE *argv;
+ VALUE mod;
+{
+ return class_instance_method_list(argc, argv, mod, 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(argc, argv, mod)
+ int argc;
+ VALUE *argv;
+ VALUE mod;
+{
+ return class_instance_method_list(argc, argv, mod, 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(argc, argv, mod)
+ int argc;
+ VALUE *argv;
+ VALUE mod;
+{
+ return class_instance_method_list(argc, argv, mod, 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(argc, argv, mod)
+ int argc;
+ VALUE *argv;
+ VALUE mod;
+{
+ return class_instance_method_list(argc, argv, mod, 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>.
+ *
+ * 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(argc, argv, obj)
+ int argc;
+ VALUE *argv;
+ VALUE obj;
+{
+ VALUE recur, ary, klass;
+ st_table *list;
+
+ rb_scan_args(argc, argv, "01", &recur);
+ if (argc == 0) {
+ recur = Qtrue;
+ }
+ klass = CLASS_OF(obj);
+ list = st_init_numtable();
+ if (klass && FL_TEST(klass, FL_SINGLETON)) {
+ st_foreach(RCLASS(klass)->m_tbl, method_entry, (st_data_t)list);
+ klass = RCLASS(klass)->super;
+ }
+ if (RTEST(recur)) {
+ while (klass && (FL_TEST(klass, FL_SINGLETON) || TYPE(klass) == T_ICLASS)) {
+ st_foreach(RCLASS(klass)->m_tbl, method_entry, (st_data_t)list);
+ klass = RCLASS(klass)->super;
+ }
+ }
+ ary = rb_ary_new();
+ st_foreach(list, ins_methods_i, ary);
+ st_free_table(list);
+
+ return ary;
+}
+
+void
+rb_define_method_id(klass, name, func, argc)
+ VALUE klass;
+ ID name;
+ VALUE (*func)();
+ int argc;
+{
+ rb_add_method(klass, name, NEW_CFUNC(func,argc), NOEX_PUBLIC);
+}
+
+void
+rb_define_method(klass, name, func, argc)
+ VALUE klass;
+ const char *name;
+ VALUE (*func)();
+ int argc;
+{
+ ID id = rb_intern(name);
+ int ex = NOEX_PUBLIC;
+
+
+ rb_add_method(klass, id, NEW_CFUNC(func, argc), ex);
+}
+
+void
+rb_define_protected_method(klass, name, func, argc)
+ VALUE klass;
+ const char *name;
+ VALUE (*func)();
+ int argc;
+{
+ rb_add_method(klass, rb_intern(name), NEW_CFUNC(func, argc), NOEX_PROTECTED);
+}
+
+void
+rb_define_private_method(klass, name, func, argc)
+ VALUE klass;
+ const char *name;
+ VALUE (*func)();
+ int argc;
+{
+ rb_add_method(klass, rb_intern(name), NEW_CFUNC(func, argc), NOEX_PRIVATE);
+}
+
+void
+rb_undef_method(klass, name)
+ VALUE klass;
+ const char *name;
+{
+ rb_add_method(klass, rb_intern(name), 0, NOEX_UNDEF);
+}
+
+#define SPECIAL_SINGLETON(x,c) do {\
+ if (obj == (x)) {\
+ return c;\
+ }\
+} while (0)
+
+VALUE
+rb_singleton_class(obj)
+ 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 %ld", obj);
+ }
+
+ DEFER_INTS;
+ if (FL_TEST(RBASIC(obj)->klass, FL_SINGLETON) &&
+ rb_iv_get(RBASIC(obj)->klass, "__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_FROZEN(obj)) OBJ_FREEZE(klass);
+ ALLOW_INTS;
+
+ return klass;
+}
+
+void
+rb_define_singleton_method(obj, name, func, argc)
+ VALUE obj;
+ const char *name;
+ VALUE (*func)();
+ int argc;
+{
+ rb_define_method(rb_singleton_class(obj), name, func, argc);
+}
+
+void
+rb_define_module_function(module, name, func, argc)
+ VALUE module;
+ const char *name;
+ VALUE (*func)();
+ int argc;
+{
+ rb_define_private_method(module, name, func, argc);
+ rb_define_singleton_method(module, name, func, argc);
+}
+
+void
+rb_define_global_function(name, func, argc)
+ const char *name;
+ VALUE (*func)();
+ int argc;
+{
+ rb_define_module_function(rb_mKernel, name, func, argc);
+}
+
+void
+rb_define_alias(klass, name1, name2)
+ VALUE klass;
+ const char *name1, *name2;
+{
+ rb_alias(klass, rb_intern(name1), rb_intern(name2));
+}
+
+void
+rb_define_attr(klass, name, read, write)
+ VALUE klass;
+ const char *name;
+ int read, write;
+{
+ rb_attr(klass, rb_intern(name), read, write, Qfalse);
+}
+
+#ifdef HAVE_STDARG_PROTOTYPES
+#include <stdarg.h>
+#define va_init_list(a,b) va_start(a,b)
+#else
+#include <varargs.h>
+#define va_init_list(a,b) va_start(a)
+#endif
+
+int
+#ifdef HAVE_STDARG_PROTOTYPES
+rb_scan_args(int argc, const VALUE *argv, const char *fmt, ...)
+#else
+rb_scan_args(argc, argv, fmt, va_alist)
+ int argc;
+ const VALUE *argv;
+ const char *fmt;
+ va_dcl
+#endif
+{
+ int n, i = 0;
+ const char *p = fmt;
+ VALUE *var;
+ va_list vargs;
+
+ va_init_list(vargs, fmt);
+
+ if (*p == '*') goto rest_arg;
+
+ if (ISDIGIT(*p)) {
+ n = *p - '0';
+ if (n > argc)
+ rb_raise(rb_eArgError, "wrong number of arguments (%d for %d)", argc, n);
+ for (i=0; i<n; i++) {
+ var = va_arg(vargs, VALUE*);
+ if (var) *var = argv[i];
+ }
+ p++;
+ }
+ else {
+ goto error;
+ }
+
+ if (ISDIGIT(*p)) {
+ n = i + *p - '0';
+ for (; i<n; i++) {
+ var = va_arg(vargs, VALUE*);
+ if (argc > i) {
+ if (var) *var = argv[i];
+ }
+ else {
+ if (var) *var = Qnil;
+ }
+ }
+ p++;
+ }
+
+ if(*p == '*') {
+ rest_arg:
+ var = va_arg(vargs, VALUE*);
+ if (argc > i) {
+ if (var) *var = rb_ary_new4(argc-i, argv+i);
+ i = argc;
+ }
+ else {
+ if (var) *var = rb_ary_new();
+ }
+ p++;
+ }
+
+ if (*p == '&') {
+ var = va_arg(vargs, VALUE*);
+ if (rb_block_given_p()) {
+ *var = rb_block_proc();
+ }
+ else {
+ *var = Qnil;
+ }
+ p++;
+ }
+ va_end(vargs);
+
+ if (*p != '\0') {
+ goto error;
+ }
+
+ if (argc > i) {
+ rb_raise(rb_eArgError, "wrong number of arguments (%d for %d)", argc, i);
+ }
+
+ return argc;
+
+ error:
+ rb_fatal("bad scan arg format: %s", fmt);
+ return 0;
+}