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ruby--ruby/class.c
matz 7ed66b9e1d 2000-02-25 
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@627 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
2000-02-25 03:51:23 +00:00

676 lines
13 KiB
C
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/************************************************
class.c -
$Author$
$Date$
created at: Tue Aug 10 15:05:44 JST 1993
Copyright (C) 1993-2000 Yukihiro Matsumoto
************************************************/
#include "ruby.h"
#include "node.h"
#include "st.h"
#include <ctype.h>
#ifdef USE_CWGUSI
#include <stdio.h>
#endif
extern st_table *rb_class_tbl;
VALUE
rb_class_new(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();
return (VALUE)klass;
}
VALUE
rb_singleton_class_new(super)
VALUE super;
{
VALUE klass = rb_class_new(super);
FL_SET(klass, FL_SINGLETON);
return klass;
}
static int
clone_method(mid, body, tbl)
ID mid;
NODE *body;
st_table *tbl;
{
st_insert(tbl, mid, NEW_METHOD(body->nd_body, body->nd_noex));
return ST_CONTINUE;
}
VALUE
rb_singleton_class_clone(klass)
VALUE klass;
{
if (!FL_TEST(klass, FL_SINGLETON))
return klass;
else {
/* copy singleton(unnamed) class */
NEWOBJ(clone, struct RClass);
CLONESETUP(clone, klass);
clone->super = RCLASS(klass)->super;
clone->iv_tbl = 0;
clone->m_tbl = 0;
clone->m_tbl = st_init_numtable();
st_foreach(RCLASS(klass)->m_tbl, clone_method, clone->m_tbl);
FL_SET(clone, FL_SINGLETON);
return (VALUE)clone;
}
}
void
rb_singleton_class_attached(klass, obj)
VALUE klass, obj;
{
if (FL_TEST(klass, FL_SINGLETON))
rb_iv_set(klass, "__attached__", obj);
}
VALUE
rb_define_class_id(id, super)
ID id;
VALUE super;
{
VALUE klass;
if (!super) super = rb_cObject;
klass = rb_class_new(super);
rb_name_class(klass, id);
/* make metaclass */
RBASIC(klass)->klass = rb_singleton_class_new(RBASIC(super)->klass);
rb_singleton_class_attached(RBASIC(klass)->klass, klass);
rb_funcall(super, rb_intern("inherited"), 1, klass);
return klass;
}
VALUE
rb_define_class(name, super)
const char *name;
VALUE super;
{
VALUE klass;
ID id;
id = rb_intern(name);
klass = rb_define_class_id(id, super);
st_add_direct(rb_class_tbl, id, 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);
klass = rb_define_class_id(id, super);
rb_const_set(outer, id, klass);
rb_set_class_path(klass, outer, name);
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);
module = rb_define_module_id(id);
st_add_direct(rb_class_tbl, id, module);
return module;
}
VALUE
rb_define_module_under(outer, name)
VALUE outer;
const char *name;
{
VALUE module;
ID id;
id = rb_intern(name);
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 (!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;
}
return (VALUE)klass;
}
void
rb_include_module(klass, module)
VALUE klass, module;
{
VALUE p;
if (NIL_P(module)) return;
if (klass == module) return;
switch (TYPE(module)) {
case T_MODULE:
case T_CLASS:
case T_ICLASS:
break;
default:
Check_Type(module, T_MODULE);
}
while (module) {
/* ignore if the module included already in superclasses */
for (p = RCLASS(klass)->super; p; p = RCLASS(p)->super) {
if (BUILTIN_TYPE(p) == T_ICLASS &&
RCLASS(p)->m_tbl == RCLASS(module)->m_tbl) {
if (RCLASS(module)->super) {
rb_include_module(p, RCLASS(module)->super);
}
return;
}
}
RCLASS(klass)->super =
include_class_new(module, RCLASS(klass)->super);
klass = RCLASS(klass)->super;
module = RCLASS(module)->super;
}
rb_clear_cache();
}
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;
}
VALUE
rb_mod_ancestors(mod)
VALUE mod;
{
VALUE ary = rb_ary_new();
VALUE p;
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;
}
static int
ins_methods_i(key, body, ary)
ID key;
NODE *body;
VALUE ary;
{
if ((body->nd_noex&(NOEX_PRIVATE|NOEX_PROTECTED)) == 0) {
VALUE name = rb_str_new2(rb_id2name(key));
if (!rb_ary_includes(ary, name)) {
if (!body->nd_body) {
rb_ary_push(ary, Qnil);
}
rb_ary_push(ary, name);
}
}
else if (body->nd_body && nd_type(body->nd_body) == NODE_ZSUPER) {
rb_ary_push(ary, Qnil);
rb_ary_push(ary, rb_str_new2(rb_id2name(key)));
}
return ST_CONTINUE;
}
static int
ins_methods_prot_i(key, body, ary)
ID key;
NODE *body;
VALUE ary;
{
if (!body->nd_body) {
rb_ary_push(ary, Qnil);
rb_ary_push(ary, rb_str_new2(rb_id2name(key)));
}
else if (body->nd_noex & NOEX_PROTECTED) {
VALUE name = rb_str_new2(rb_id2name(key));
if (!rb_ary_includes(ary, name)) {
rb_ary_push(ary, name);
}
}
else if (nd_type(body->nd_body) == NODE_ZSUPER) {
rb_ary_push(ary, Qnil);
rb_ary_push(ary, rb_str_new2(rb_id2name(key)));
}
return ST_CONTINUE;
}
static int
ins_methods_priv_i(key, body, ary)
ID key;
NODE *body;
VALUE ary;
{
if (!body->nd_body) {
rb_ary_push(ary, Qnil);
rb_ary_push(ary, rb_str_new2(rb_id2name(key)));
}
else if (body->nd_noex & NOEX_PRIVATE) {
VALUE name = rb_str_new2(rb_id2name(key));
if (!rb_ary_includes(ary, name)) {
rb_ary_push(ary, name);
}
}
else if (nd_type(body->nd_body) == NODE_ZSUPER) {
rb_ary_push(ary, Qnil);
rb_ary_push(ary, rb_str_new2(rb_id2name(key)));
}
return ST_CONTINUE;
}
static VALUE
method_list(mod, option, func)
VALUE mod;
int option;
int (*func)();
{
VALUE ary;
VALUE klass;
VALUE *p, *q, *pend;
if (!OBJ_TAINTED(mod) && rb_safe_level() >= 4)
rb_raise(rb_eSecurityError, "Insecure: can't get metainfo");
ary = rb_ary_new();
for (klass = mod; klass; klass = RCLASS(klass)->super) {
st_foreach(RCLASS(klass)->m_tbl, func, ary);
if (!option) break;
}
p = q = RARRAY(ary)->ptr; pend = p + RARRAY(ary)->len;
while (p < pend) {
if (*p == Qnil) {
p+=2;
continue;
}
*q++ = *p++;
}
RARRAY(ary)->len = q - RARRAY(ary)->ptr;
return ary;
}
VALUE
rb_class_instance_methods(argc, argv, mod)
int argc;
VALUE *argv;
VALUE mod;
{
VALUE option;
rb_scan_args(argc, argv, "01", &option);
return method_list(mod, RTEST(option), ins_methods_i);
}
VALUE
rb_class_protected_instance_methods(argc, argv, mod)
int argc;
VALUE *argv;
VALUE mod;
{
VALUE option;
rb_scan_args(argc, argv, "01", &option);
return method_list(mod, RTEST(option), ins_methods_prot_i);
}
VALUE
rb_class_private_instance_methods(argc, argv, mod)
int argc;
VALUE *argv;
VALUE mod;
{
VALUE option;
rb_scan_args(argc, argv, "01", &option);
return method_list(mod, RTEST(option), ins_methods_priv_i);
}
VALUE
rb_obj_singleton_methods(obj)
VALUE obj;
{
VALUE ary;
VALUE klass;
VALUE *p, *q, *pend;
if (rb_safe_level() >= 4 && !OBJ_TAINTED(obj))
rb_raise(rb_eSecurityError, "Insecure: can't get metainfo");
ary = rb_ary_new();
klass = CLASS_OF(obj);
while (klass && FL_TEST(klass, FL_SINGLETON)) {
st_foreach(RCLASS(klass)->m_tbl, ins_methods_i, ary);
klass = RCLASS(klass)->super;
}
p = q = RARRAY(ary)->ptr; pend = p + RARRAY(ary)->len;
while (p < pend) {
if (*p == Qnil) {
p+=2;
continue;
}
*q++ = *p++;
}
RARRAY(ary)->len = q - RARRAY(ary)->ptr;
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|NOEX_CFUNC);
}
void
rb_define_method(klass, name, func, argc)
VALUE klass;
const char *name;
VALUE (*func)();
int argc;
{
ID id = rb_intern(name);
rb_add_method(klass, id, NEW_CFUNC(func, argc),
((name[0] == 'i' && id == rb_intern("initialize"))?
NOEX_PRIVATE:NOEX_PUBLIC)|NOEX_CFUNC);
}
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|NOEX_CFUNC);
}
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|NOEX_CFUNC);
}
void
rb_undef_method(klass, name)
VALUE klass;
const char *name;
{
rb_add_method(klass, rb_intern(name), 0, NOEX_UNDEF);
}
VALUE
rb_singleton_class(obj)
VALUE obj;
{
VALUE klass;
if (rb_special_const_p(obj)) {
rb_raise(rb_eTypeError, "can't define singleton");
}
if (FL_TEST(RBASIC(obj)->klass, FL_SINGLETON)) {
klass = RBASIC(obj)->klass;
}
else {
klass = rb_singleton_class_new(RBASIC(obj)->klass);
RBASIC(obj)->klass = klass;
rb_singleton_class_attached(klass, obj);
}
if (OBJ_TAINTED(obj)) {
OBJ_TAINT(klass);
}
else {
FL_UNSET(klass, FL_TAINT);
}
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, VALUE *argv, const char *fmt, ...)
#else
rb_scan_args(argc, argv, fmt, va_alist)
int argc;
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 # 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_iterator_p()) {
*var = rb_f_lambda();
}
else {
*var = Qnil;
}
p++;
}
va_end(vargs);
if (*p != '\0') {
goto error;
}
if (argc > i) {
rb_raise(rb_eArgError, "wrong # of arguments(%d for %d)", argc, i);
}
return argc;
error:
rb_fatal("bad scan arg format: %s", fmt);
return 0;
}
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