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ruby--ruby/class.c
matz 7ea2ceddb8 This commit was generated by cvs2svn to compensate for changes in r11,
which included commits to RCS files with non-trunk default branches.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@12 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
1998-01-16 12:19:22 +00:00

598 lines
11 KiB
C

/************************************************
class.c -
$Author$
$Date$
created at: Tue Aug 10 15:05:44 JST 1993
Copyright (C) 1993-1995 Yukihiro Matsumoto
************************************************/
#include "ruby.h"
#include "node.h"
#include "st.h"
struct st_table *new_idhash();
extern st_table *rb_class_tbl;
extern VALUE cClass;
extern VALUE cModule;
VALUE
class_new(super)
VALUE super;
{
NEWOBJ(klass, struct RClass);
OBJSETUP(klass, cClass, T_CLASS);
klass->super = super;
klass->iv_tbl = 0;
klass->m_tbl = 0; /* safe GC */
klass->m_tbl = new_idhash();
return (VALUE)klass;
}
VALUE
singleton_class_new(super)
VALUE super;
{
VALUE klass = 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
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 = new_idhash();
st_foreach(RCLASS(klass)->m_tbl, clone_method, clone->m_tbl);
FL_SET(clone, FL_SINGLETON);
return (VALUE)clone;
}
}
void
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 = cObject;
klass = class_new(super);
rb_name_class(klass, id);
/* make metaclass */
RBASIC(klass)->class = singleton_class_new(RBASIC(super)->class);
singleton_class_attached(RBASIC(klass)->class, klass);
rb_funcall(super, rb_intern("inherited"), 1, klass);
return (VALUE)klass;
}
VALUE
rb_define_class(name, super)
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(under, name, super)
VALUE under;
char *name;
VALUE super;
{
VALUE klass;
ID id;
id = rb_intern(name);
klass = rb_define_class_id(id, super);
rb_const_set(under, id, klass);
rb_set_class_path(klass, under, name);
return klass;
}
VALUE
module_new()
{
NEWOBJ(mdl, struct RClass);
OBJSETUP(mdl, cModule, T_MODULE);
mdl->super = 0;
mdl->iv_tbl = 0;
mdl->m_tbl = 0;
mdl->m_tbl = new_idhash();
return (VALUE)mdl;
}
VALUE
rb_define_module_id(id)
ID id;
{
extern st_table *rb_class_tbl;
VALUE mdl = module_new();
rb_name_class(mdl, id);
return mdl;
}
VALUE
rb_define_module(name)
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(under, name)
VALUE under;
char *name;
{
VALUE module;
ID id;
id = rb_intern(name);
module = rb_define_module_id(id);
rb_const_set(under, id, module);
rb_set_class_path(module, under, name);
return module;
}
static VALUE
include_class_new(module, super)
VALUE module, super;
{
NEWOBJ(klass, struct RClass);
OBJSETUP(klass, cClass, T_ICLASS);
klass->m_tbl = RCLASS(module)->m_tbl;
klass->iv_tbl = RCLASS(module)->iv_tbl;
klass->super = super;
if (TYPE(module) == T_ICLASS) {
RBASIC(klass)->class = RBASIC(module)->class;
}
else {
RBASIC(klass)->class = module;
}
return (VALUE)klass;
}
void
rb_include_module(klass, module)
VALUE klass, module;
{
VALUE p;
if (NIL_P(module)) return;
switch (TYPE(module)) {
case T_MODULE:
case T_CLASS:
break;
default:
Check_Type(module, T_MODULE);
}
if (klass == module) return;
rb_clear_cache();
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)
return;
}
RCLASS(klass)->super =
include_class_new(module, RCLASS(klass)->super);
klass = RCLASS(klass)->super;
module = RCLASS(module)->super;
}
}
VALUE
mod_included_modules(mod)
VALUE mod;
{
VALUE ary = ary_new();
VALUE p;
for (p = RCLASS(mod)->super; p; p = RCLASS(p)->super) {
if (BUILTIN_TYPE(p) == T_ICLASS) {
ary_push(ary, RBASIC(p)->class);
}
}
return ary;
}
VALUE
mod_ancestors(mod)
VALUE mod;
{
VALUE ary = ary_new();
VALUE p;
for (p = mod; p; p = RCLASS(p)->super) {
if (BUILTIN_TYPE(p) == T_ICLASS) {
ary_push(ary, RBASIC(p)->class);
}
else {
ary_push(ary, p);
}
}
return ary;
}
static int
ins_methods_i(key, body, ary)
ID key;
NODE *body;
VALUE ary;
{
if (!body->nd_noex) {
VALUE name = str_new2(rb_id2name(key));
if (!ary_includes(ary, name)) {
if (!body->nd_body) {
ary_push(ary, Qnil);
}
ary_push(ary, name);
}
}
else if (nd_type(body->nd_body) == NODE_ZSUPER) {
ary_push(ary, Qnil);
ary_push(ary, 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) {
ary_push(ary, Qnil);
ary_push(ary, str_new2(rb_id2name(key)));
}
else if (body->nd_noex) {
VALUE name = str_new2(rb_id2name(key));
if (!ary_includes(ary, name)) {
ary_push(ary, name);
}
}
else if (nd_type(body->nd_body) == NODE_ZSUPER) {
ary_push(ary, Qnil);
ary_push(ary, 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;
ary = 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
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
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
obj_singleton_methods(obj)
VALUE obj;
{
VALUE ary;
VALUE klass;
VALUE *p, *q, *pend;
ary = 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);
}
void
rb_define_method(klass, name, func, argc)
VALUE klass;
char *name;
VALUE (*func)();
int argc;
{
rb_add_method(klass, rb_intern(name), NEW_CFUNC(func, argc), NOEX_PUBLIC);
}
void
rb_undef_method(klass, name)
VALUE klass;
char *name;
{
rb_add_method(klass, rb_intern(name), 0, NOEX_PUBLIC);
}
void
rb_define_private_method(klass, name, func, argc)
VALUE klass;
char *name;
VALUE (*func)();
int argc;
{
rb_add_method(klass, rb_intern(name), NEW_CFUNC(func, argc), NOEX_PRIVATE);
}
VALUE
rb_singleton_class(obj)
VALUE obj;
{
if (rb_special_const_p(obj)) {
TypeError("cannot define singleton");
}
if (FL_TEST(RBASIC(obj)->class, FL_SINGLETON)) {
return (VALUE)RBASIC(obj)->class;
}
RBASIC(obj)->class = singleton_class_new(RBASIC(obj)->class);
singleton_class_attached(RBASIC(obj)->class, obj);
return RBASIC(obj)->class;
}
void
rb_define_singleton_method(obj, name, func, argc)
VALUE obj;
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;
char *name;
VALUE (*func)();
int argc;
{
rb_define_private_method(module, name, func, argc);
rb_define_singleton_method(module, name, func, argc);
}
extern VALUE mKernel;
void
rb_define_global_function(name, func, argc)
char *name;
VALUE (*func)();
int argc;
{
rb_define_private_method(mKernel, name, func, argc);
}
void
rb_define_alias(klass, name1, name2)
VALUE klass;
char *name1, *name2;
{
rb_alias(klass, rb_intern(name1), rb_intern(name2));
}
void
rb_define_attr(klass, id, read, write)
VALUE klass;
ID id;
int read, write;
{
char *name;
char *buf;
ID attr, attreq, attriv;
name = rb_id2name(id);
attr = rb_intern(name);
buf = ALLOCA_N(char,strlen(name)+2);
sprintf(buf, "%s=", name);
attreq = rb_intern(buf);
sprintf(buf, "@%s", name);
attriv = rb_intern(buf);
if (read) {
rb_add_method(klass, attr, NEW_IVAR(attriv), 0);
}
if (write) {
rb_add_method(klass, attreq, NEW_ATTRSET(attriv), 0);
}
}
#include <varargs.h>
#include <ctype.h>
int
rb_scan_args(argc, argv, fmt, va_alist)
int argc;
VALUE *argv;
char *fmt;
va_dcl
{
int n, i;
char *p = fmt;
VALUE *var;
va_list vargs;
va_start(vargs);
if (*p == '*') {
var = va_arg(vargs, VALUE*);
*var = ary_new4(argc, argv);
return argc;
}
if (isdigit(*p)) {
n = *p - '0';
if (n > argc)
ArgError("Wrong # of arguments (%d for %d)", argc, n);
for (i=0; i<n; i++) {
var = va_arg(vargs, VALUE*);
*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) {
*var = argv[i];
}
else {
*var = Qnil;
}
}
p++;
}
if(*p == '*') {
var = va_arg(vargs, VALUE*);
if (argc > i) {
*var = ary_new4(argc-i, argv+i);
}
else {
*var = ary_new();
}
}
else if (*p == '\0') {
if (argc > i) {
ArgError("Wrong # of arguments(%d for %d)", argc, i);
}
}
else {
goto error;
}
va_end(vargs);
return argc;
error:
Fatal("bad scan arg format: %s", fmt);
return 0;
}