зеркало из https://github.com/github/ruby.git
1898 строки
37 KiB
C
1898 строки
37 KiB
C
/**********************************************************************
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variable.c -
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$Author$
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$Date$
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created at: Tue Apr 19 23:55:15 JST 1994
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Copyright (C) 1993-2003 Yukihiro Matsumoto
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Copyright (C) 2000 Network Applied Communication Laboratory, Inc.
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Copyright (C) 2000 Information-technology Promotion Agency, Japan
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**********************************************************************/
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#include "ruby.h"
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#include "env.h"
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#include "node.h"
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#include "st.h"
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#include "util.h"
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static st_table *rb_global_tbl;
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st_table *rb_class_tbl;
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static ID autoload, classpath, tmp_classpath;
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void
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Init_var_tables()
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{
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rb_global_tbl = st_init_numtable();
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rb_class_tbl = st_init_numtable();
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autoload = rb_intern("__autoload__");
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classpath = rb_intern("__classpath__");
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tmp_classpath = rb_intern("__tmp_classpath__");
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}
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struct fc_result {
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ID name;
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VALUE klass;
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VALUE path;
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VALUE track;
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struct fc_result *prev;
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};
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static VALUE
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fc_path(fc, name)
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struct fc_result *fc;
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ID name;
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{
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VALUE path, tmp;
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path = rb_str_new2(rb_id2name(name));
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while (fc) {
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if (fc->track == rb_cObject) break;
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if (ROBJECT(fc->track)->iv_tbl &&
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st_lookup(ROBJECT(fc->track)->iv_tbl, classpath, &tmp)) {
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tmp = rb_str_dup(tmp);
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rb_str_cat2(tmp, "::");
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rb_str_append(tmp, path);
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return tmp;
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}
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tmp = rb_str_new2(rb_id2name(fc->name));
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rb_str_cat2(tmp, "::");
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rb_str_append(tmp, path);
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path = tmp;
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fc = fc->prev;
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}
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return path;
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}
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static int
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fc_i(key, value, res)
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ID key;
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VALUE value;
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struct fc_result *res;
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{
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if (!rb_is_const_id(key)) return ST_CONTINUE;
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if (value == res->klass) {
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res->path = fc_path(res, key);
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return ST_STOP;
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}
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switch (TYPE(value)) {
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case T_MODULE:
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case T_CLASS:
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if (!RCLASS(value)->iv_tbl) return ST_CONTINUE;
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else {
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struct fc_result arg;
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struct fc_result *list;
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list = res;
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while (list) {
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if (list->track == value) return ST_CONTINUE;
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list = list->prev;
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}
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arg.name = key;
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arg.path = 0;
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arg.klass = res->klass;
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arg.track = value;
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arg.prev = res;
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st_foreach(RCLASS(value)->iv_tbl, fc_i, (st_data_t)&arg);
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if (arg.path) {
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res->path = arg.path;
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return ST_STOP;
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}
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}
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break;
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default:
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break;
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}
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return ST_CONTINUE;
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}
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static VALUE
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find_class_path(klass)
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VALUE klass;
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{
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struct fc_result arg;
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arg.name = 0;
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arg.path = 0;
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arg.klass = klass;
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arg.track = rb_cObject;
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arg.prev = 0;
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if (RCLASS(rb_cObject)->iv_tbl) {
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st_foreach(RCLASS(rb_cObject)->iv_tbl, fc_i, (st_data_t)&arg);
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}
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if (arg.path == 0) {
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st_foreach(rb_class_tbl, fc_i, (st_data_t)&arg);
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}
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if (arg.path) {
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if (!ROBJECT(klass)->iv_tbl) {
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ROBJECT(klass)->iv_tbl = st_init_numtable();
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}
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st_insert(ROBJECT(klass)->iv_tbl, classpath, arg.path);
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st_delete(RCLASS(klass)->iv_tbl, &tmp_classpath, 0);
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return arg.path;
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}
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return Qnil;
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}
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static VALUE
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classname(klass)
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VALUE klass;
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{
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VALUE path = Qnil;
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if (!klass) klass = rb_cObject;
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if (ROBJECT(klass)->iv_tbl) {
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if (!st_lookup(ROBJECT(klass)->iv_tbl, classpath, &path)) {
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ID classid = rb_intern("__classid__");
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if (!st_lookup(ROBJECT(klass)->iv_tbl, classid, &path)) {
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return find_class_path(klass);
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}
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path = rb_str_new2(rb_id2name(SYM2ID(path)));
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st_insert(ROBJECT(klass)->iv_tbl, classpath, path);
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st_delete(RCLASS(klass)->iv_tbl, (st_data_t*)&classid, 0);
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}
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if (TYPE(path) != T_STRING) {
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rb_bug("class path is not set properly");
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}
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return path;
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}
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return find_class_path(klass);
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}
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/*
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* call-seq:
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* mod.name => string
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*
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* Returns the name of the module <i>mod</i>.
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*/
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VALUE
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rb_mod_name(mod)
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VALUE mod;
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{
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VALUE path = classname(mod);
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if (!NIL_P(path)) return rb_str_dup(path);
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return rb_str_new(0,0);
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}
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VALUE
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rb_class_path(klass)
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VALUE klass;
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{
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VALUE path = classname(klass);
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if (!NIL_P(path)) return path;
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if (RCLASS(klass)->iv_tbl && st_lookup(RCLASS(klass)->iv_tbl,
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tmp_classpath, &path)) {
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return path;
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}
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else {
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char *s = "Class";
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if (TYPE(klass) == T_MODULE) {
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if (rb_obj_class(klass) == rb_cModule) {
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s = "Module";
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}
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else {
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s = rb_class2name(RBASIC(klass)->klass);
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}
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}
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path = rb_str_new(0, 2 + strlen(s) + 3 + 2 * SIZEOF_LONG + 1);
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sprintf(RSTRING(path)->ptr, "#<%s:0x%lx>", s, klass);
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RSTRING(path)->len = strlen(RSTRING(path)->ptr);
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rb_ivar_set(klass, tmp_classpath, path);
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return path;
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}
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}
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void
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rb_set_class_path(klass, under, name)
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VALUE klass, under;
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const char *name;
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{
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VALUE str;
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if (under == rb_cObject) {
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str = rb_str_new2(name);
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}
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else {
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str = rb_str_dup(rb_class_path(under));
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rb_str_cat2(str, "::");
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rb_str_cat2(str, name);
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}
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rb_ivar_set(klass, classpath, str);
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}
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VALUE
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rb_path2class(path)
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const char *path;
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{
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const char *pbeg, *p;
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ID id;
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VALUE c = rb_cObject;
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if (path[0] == '#') {
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rb_raise(rb_eArgError, "can't retrieve anonymous class %s", path);
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}
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pbeg = p = path;
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while (*p) {
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VALUE str;
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while (*p && *p != ':') p++;
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str = rb_str_new(pbeg, p-pbeg);
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id = rb_intern(RSTRING(str)->ptr);
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if (p[0] == ':') {
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if (p[1] != ':') goto undefined_class;
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p += 2;
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pbeg = p;
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}
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if (!rb_const_defined(c, id)) {
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undefined_class:
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rb_raise(rb_eArgError, "undefined class/module %.*s", p-path, path);
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}
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c = rb_const_get_at(c, id);
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switch (TYPE(c)) {
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case T_MODULE:
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case T_CLASS:
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break;
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default:
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rb_raise(rb_eTypeError, "%s does not refer class/module", path);
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}
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}
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return c;
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}
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void
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rb_name_class(klass, id)
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VALUE klass;
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ID id;
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{
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rb_iv_set(klass, "__classid__", ID2SYM(id));
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}
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VALUE
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rb_class_name(klass)
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VALUE klass;
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{
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return rb_class_path(rb_class_real(klass));
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}
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char *
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rb_class2name(klass)
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VALUE klass;
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{
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return RSTRING(rb_class_name(klass))->ptr;
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}
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char *
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rb_obj_classname(obj)
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VALUE obj;
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{
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return rb_class2name(CLASS_OF(obj));
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}
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struct trace_var {
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int removed;
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void (*func)();
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VALUE data;
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struct trace_var *next;
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};
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struct global_variable {
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int counter;
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void *data;
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VALUE (*getter)();
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void (*setter)();
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void (*marker)();
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int block_trace;
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struct trace_var *trace;
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};
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struct global_entry {
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struct global_variable *var;
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ID id;
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};
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static VALUE undef_getter();
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static void undef_setter();
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static void undef_marker();
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static VALUE val_getter();
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static void val_setter();
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static void val_marker();
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static VALUE var_getter();
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static void var_setter();
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static void var_marker();
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struct global_entry*
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rb_global_entry(id)
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ID id;
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{
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struct global_entry *entry;
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if (!st_lookup(rb_global_tbl, id, (st_data_t *)&entry)) {
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struct global_variable *var;
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entry = ALLOC(struct global_entry);
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var = ALLOC(struct global_variable);
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entry->id = id;
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entry->var = var;
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var->counter = 1;
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var->data = 0;
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var->getter = undef_getter;
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var->setter = undef_setter;
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var->marker = undef_marker;
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var->block_trace = 0;
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var->trace = 0;
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st_add_direct(rb_global_tbl, id, (st_data_t)entry);
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}
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return entry;
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}
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static VALUE
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undef_getter(id)
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ID id;
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{
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rb_warning("global variable `%s' not initialized", rb_id2name(id));
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return Qnil;
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}
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static void
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undef_setter(val, id, data, var)
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VALUE val;
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ID id;
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void *data;
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struct global_variable *var;
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{
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var->getter = val_getter;
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var->setter = val_setter;
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var->marker = val_marker;
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var->data = (void*)val;
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}
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static void
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undef_marker()
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{
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}
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static VALUE
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val_getter(id, val)
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ID id;
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VALUE val;
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{
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return val;
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}
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static void
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val_setter(val, id, data, var)
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VALUE val;
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ID id;
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void *data;
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struct global_variable *var;
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{
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var->data = (void*)val;
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}
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static void
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val_marker(data)
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VALUE data;
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{
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if (data) rb_gc_mark_maybe(data);
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}
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static VALUE
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var_getter(id, var)
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ID id;
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VALUE *var;
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{
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if (!var) return Qnil;
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return *var;
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}
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static void
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var_setter(val, id, var)
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VALUE val;
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ID id;
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VALUE *var;
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{
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*var = val;
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}
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static void
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var_marker(var)
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VALUE *var;
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{
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if (var) rb_gc_mark_maybe(*var);
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}
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static void
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readonly_setter(val, id, var)
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VALUE val;
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ID id;
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void *var;
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{
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rb_name_error(id, "%s is a read-only variable", rb_id2name(id));
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}
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static int
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mark_global_entry(key, entry)
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ID key;
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struct global_entry *entry;
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{
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struct trace_var *trace;
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struct global_variable *var = entry->var;
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(*var->marker)(var->data);
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trace = var->trace;
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while (trace) {
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if (trace->data) rb_gc_mark_maybe(trace->data);
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trace = trace->next;
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}
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return ST_CONTINUE;
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}
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void
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rb_gc_mark_global_tbl()
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{
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st_foreach(rb_global_tbl, mark_global_entry, 0);
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}
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static ID
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global_id(name)
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const char *name;
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{
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ID id;
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if (name[0] == '$') id = rb_intern(name);
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else {
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char *buf = ALLOCA_N(char, strlen(name)+2);
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buf[0] = '$';
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strcpy(buf+1, name);
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id = rb_intern(buf);
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}
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return id;
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}
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void
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rb_define_hooked_variable(name, var, getter, setter)
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const char *name;
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VALUE *var;
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VALUE (*getter)();
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void (*setter)();
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{
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struct global_variable *gvar;
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ID id = global_id(name);
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gvar = rb_global_entry(id)->var;
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gvar->data = (void*)var;
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gvar->getter = getter?getter:var_getter;
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gvar->setter = setter?setter:var_setter;
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gvar->marker = var_marker;
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}
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void
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rb_define_variable(name, var)
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const char *name;
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VALUE *var;
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{
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rb_define_hooked_variable(name, var, 0, 0);
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}
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void
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rb_define_readonly_variable(name, var)
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const char *name;
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VALUE *var;
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{
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rb_define_hooked_variable(name, var, 0, readonly_setter);
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}
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void
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rb_define_virtual_variable(name, getter, setter)
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const char *name;
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VALUE (*getter)();
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void (*setter)();
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{
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if (!getter) getter = val_getter;
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if (!setter) setter = readonly_setter;
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rb_define_hooked_variable(name, 0, getter, setter);
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}
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static void
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rb_trace_eval(cmd, val)
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VALUE cmd, val;
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{
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rb_eval_cmd(cmd, rb_ary_new3(1, val), 0);
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}
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/*
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* call-seq:
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* trace_var(symbol, cmd ) => nil
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* trace_var(symbol) {|val| block } => nil
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*
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* Controls tracing of assignments to global variables. The parameter
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* +symbol_ identifies the variable (as either a string name or a
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* symbol identifier). _cmd_ (which may be a string or a
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* +Proc+ object) or block is executed whenever the variable
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* is assigned. The block or +Proc+ object receives the
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* variable's new value as a parameter. Also see
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* <code>Kernel::untrace_var</code>.
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*
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* trace_var :$_, proc {|v| puts "$_ is now '#{v}'" }
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* $_ = "hello"
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* $_ = ' there'
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*
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* <em>produces:</em>
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*
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* $_ is now 'hello'
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* $_ is now ' there'
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*/
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VALUE
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rb_f_trace_var(argc, argv)
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int argc;
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VALUE *argv;
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{
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VALUE var, cmd;
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struct global_entry *entry;
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struct trace_var *trace;
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rb_secure(4);
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if (rb_scan_args(argc, argv, "11", &var, &cmd) == 1) {
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cmd = rb_block_proc();
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}
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if (NIL_P(cmd)) {
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return rb_f_untrace_var(argc, argv);
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}
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entry = rb_global_entry(rb_to_id(var));
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if (OBJ_TAINTED(cmd)) {
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rb_raise(rb_eSecurityError, "Insecure: tainted variable trace");
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}
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trace = ALLOC(struct trace_var);
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trace->next = entry->var->trace;
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trace->func = rb_trace_eval;
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trace->data = cmd;
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trace->removed = 0;
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entry->var->trace = trace;
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return Qnil;
|
|
}
|
|
|
|
static void
|
|
remove_trace(var)
|
|
struct global_variable *var;
|
|
{
|
|
struct trace_var *trace = var->trace;
|
|
struct trace_var t;
|
|
struct trace_var *next;
|
|
|
|
t.next = trace;
|
|
trace = &t;
|
|
while (trace->next) {
|
|
next = trace->next;
|
|
if (next->removed) {
|
|
trace->next = next->next;
|
|
free(next);
|
|
}
|
|
else {
|
|
trace = next;
|
|
}
|
|
}
|
|
var->trace = t.next;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* untrace_var(symbol [, cmd] ) => array or nil
|
|
*
|
|
* Removes tracing for the specified command on the given global
|
|
* variable and returns +nil+. If no command is specified,
|
|
* removes all tracing for that variable and returns an array
|
|
* containing the commands actually removed.
|
|
*/
|
|
|
|
VALUE
|
|
rb_f_untrace_var(argc, argv)
|
|
int argc;
|
|
VALUE *argv;
|
|
{
|
|
VALUE var, cmd;
|
|
ID id;
|
|
struct global_entry *entry;
|
|
struct trace_var *trace;
|
|
|
|
rb_scan_args(argc, argv, "11", &var, &cmd);
|
|
id = rb_to_id(var);
|
|
if (!st_lookup(rb_global_tbl, id, (st_data_t *)&entry)) {
|
|
rb_name_error(id, "undefined global variable %s", rb_id2name(id));
|
|
}
|
|
|
|
trace = entry->var->trace;
|
|
if (NIL_P(cmd)) {
|
|
VALUE ary = rb_ary_new();
|
|
|
|
while (trace) {
|
|
struct trace_var *next = trace->next;
|
|
rb_ary_push(ary, (VALUE)trace->data);
|
|
trace->removed = 1;
|
|
trace = next;
|
|
}
|
|
|
|
if (!entry->var->block_trace) remove_trace(entry->var);
|
|
return ary;
|
|
}
|
|
else {
|
|
while (trace) {
|
|
if (trace->data == cmd) {
|
|
trace->removed = 1;
|
|
if (!entry->var->block_trace) remove_trace(entry->var);
|
|
return rb_ary_new3(1, cmd);
|
|
}
|
|
trace = trace->next;
|
|
}
|
|
}
|
|
return Qnil;
|
|
}
|
|
|
|
VALUE
|
|
rb_gvar_get(entry)
|
|
struct global_entry *entry;
|
|
{
|
|
struct global_variable *var = entry->var;
|
|
return (*var->getter)(entry->id, var->data, var);
|
|
}
|
|
|
|
struct trace_data {
|
|
struct trace_var *trace;
|
|
VALUE val;
|
|
};
|
|
|
|
static VALUE
|
|
trace_ev(data)
|
|
struct trace_data *data;
|
|
{
|
|
struct trace_var *trace = data->trace;
|
|
|
|
while (trace) {
|
|
(*trace->func)(trace->data, data->val);
|
|
trace = trace->next;
|
|
}
|
|
return Qnil; /* not reached */
|
|
}
|
|
|
|
static VALUE
|
|
trace_en(var)
|
|
struct global_variable *var;
|
|
{
|
|
var->block_trace = 0;
|
|
remove_trace(var);
|
|
return Qnil; /* not reached */
|
|
}
|
|
|
|
VALUE
|
|
rb_gvar_set(entry, val)
|
|
struct global_entry *entry;
|
|
VALUE val;
|
|
{
|
|
struct trace_data trace;
|
|
struct global_variable *var = entry->var;
|
|
|
|
if (rb_safe_level() >= 4)
|
|
rb_raise(rb_eSecurityError, "Insecure: can't change global variable value");
|
|
(*var->setter)(val, entry->id, var->data, var);
|
|
|
|
if (var->trace && !var->block_trace) {
|
|
var->block_trace = 1;
|
|
trace.trace = var->trace;
|
|
trace.val = val;
|
|
rb_ensure(trace_ev, (VALUE)&trace, trace_en, (VALUE)var);
|
|
}
|
|
return val;
|
|
}
|
|
|
|
VALUE
|
|
rb_gv_set(name, val)
|
|
const char *name;
|
|
VALUE val;
|
|
{
|
|
struct global_entry *entry;
|
|
|
|
entry = rb_global_entry(global_id(name));
|
|
return rb_gvar_set(entry, val);
|
|
}
|
|
|
|
VALUE
|
|
rb_gv_get(name)
|
|
const char *name;
|
|
{
|
|
struct global_entry *entry;
|
|
|
|
entry = rb_global_entry(global_id(name));
|
|
return rb_gvar_get(entry);
|
|
}
|
|
|
|
VALUE
|
|
rb_gvar_defined(entry)
|
|
struct global_entry *entry;
|
|
{
|
|
if (entry->var->getter == undef_getter) return Qfalse;
|
|
return Qtrue;
|
|
}
|
|
|
|
static int
|
|
gvar_i(key, entry, ary)
|
|
ID key;
|
|
struct global_entry *entry;
|
|
VALUE ary;
|
|
{
|
|
rb_ary_push(ary, rb_str_new2(rb_id2name(key)));
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* global_variables => array
|
|
*
|
|
* Returns an array of the names of global variables.
|
|
*
|
|
* global_variables.grep /std/ #=> ["$stderr", "$stdout", "$stdin"]
|
|
*/
|
|
|
|
VALUE
|
|
rb_f_global_variables()
|
|
{
|
|
VALUE ary = rb_ary_new();
|
|
char buf[4];
|
|
char *s = "&`'+123456789";
|
|
|
|
st_foreach(rb_global_tbl, gvar_i, ary);
|
|
if (!NIL_P(rb_backref_get())) {
|
|
while (*s) {
|
|
sprintf(buf, "$%c", *s++);
|
|
rb_ary_push(ary, rb_str_new2(buf));
|
|
}
|
|
}
|
|
return ary;
|
|
}
|
|
|
|
void
|
|
rb_alias_variable(name1, name2)
|
|
ID name1;
|
|
ID name2;
|
|
{
|
|
struct global_entry *entry1, *entry2;
|
|
|
|
if (rb_safe_level() >= 4)
|
|
rb_raise(rb_eSecurityError, "Insecure: can't alias global variable");
|
|
|
|
entry2 = rb_global_entry(name2);
|
|
if (!st_lookup(rb_global_tbl, name1, (st_data_t *)&entry1)) {
|
|
entry1 = ALLOC(struct global_entry);
|
|
entry1->id = name1;
|
|
st_add_direct(rb_global_tbl, name1, (st_data_t)entry1);
|
|
}
|
|
else if (entry1->var != entry2->var) {
|
|
struct global_variable *var = entry1->var;
|
|
if (var->block_trace) {
|
|
rb_raise(rb_eRuntimeError, "can't alias in tracer");
|
|
}
|
|
var->counter--;
|
|
if (var->counter == 0) {
|
|
struct trace_var *trace = var->trace;
|
|
while (trace) {
|
|
struct trace_var *next = trace->next;
|
|
free(trace);
|
|
trace = next;
|
|
}
|
|
free(var);
|
|
}
|
|
}
|
|
else {
|
|
return;
|
|
}
|
|
entry2->var->counter++;
|
|
entry1->var = entry2->var;
|
|
}
|
|
|
|
static int special_generic_ivar = 0;
|
|
static st_table *generic_iv_tbl;
|
|
|
|
st_table*
|
|
rb_generic_ivar_table(obj)
|
|
VALUE obj;
|
|
{
|
|
st_table *tbl;
|
|
|
|
if (!FL_TEST(obj, FL_EXIVAR)) return 0;
|
|
if (!generic_iv_tbl) return 0;
|
|
if (!st_lookup(generic_iv_tbl, obj, (st_data_t *)&tbl)) return 0;
|
|
return tbl;
|
|
}
|
|
|
|
static VALUE
|
|
generic_ivar_get(obj, id)
|
|
VALUE obj;
|
|
ID id;
|
|
{
|
|
st_table *tbl;
|
|
VALUE val;
|
|
|
|
if (generic_iv_tbl) {
|
|
if (st_lookup(generic_iv_tbl, obj, (st_data_t *)&tbl)) {
|
|
if (st_lookup(tbl, id, &val)) {
|
|
return val;
|
|
}
|
|
}
|
|
}
|
|
|
|
rb_warning("instance variable %s not initialized", rb_id2name(id));
|
|
return Qnil;
|
|
}
|
|
|
|
static void
|
|
generic_ivar_set(obj, id, val)
|
|
VALUE obj;
|
|
ID id;
|
|
VALUE val;
|
|
{
|
|
st_table *tbl;
|
|
|
|
if (rb_special_const_p(obj)) {
|
|
special_generic_ivar = 1;
|
|
}
|
|
if (!generic_iv_tbl) {
|
|
generic_iv_tbl = st_init_numtable();
|
|
}
|
|
|
|
if (!st_lookup(generic_iv_tbl, obj, (st_data_t *)&tbl)) {
|
|
FL_SET(obj, FL_EXIVAR);
|
|
tbl = st_init_numtable();
|
|
st_add_direct(generic_iv_tbl, obj, (st_data_t)tbl);
|
|
st_add_direct(tbl, id, val);
|
|
return;
|
|
}
|
|
st_insert(tbl, id, val);
|
|
}
|
|
|
|
static VALUE
|
|
generic_ivar_defined(obj, id)
|
|
VALUE obj;
|
|
ID id;
|
|
{
|
|
st_table *tbl;
|
|
VALUE val;
|
|
|
|
if (!generic_iv_tbl) return Qfalse;
|
|
if (!st_lookup(generic_iv_tbl, obj, (st_data_t *)&tbl)) return Qfalse;
|
|
if (st_lookup(tbl, id, &val)) {
|
|
return Qtrue;
|
|
}
|
|
return Qfalse;
|
|
}
|
|
|
|
static int
|
|
generic_ivar_remove(obj, id, valp)
|
|
VALUE obj;
|
|
ID id;
|
|
VALUE *valp;
|
|
{
|
|
st_table *tbl;
|
|
int status;
|
|
|
|
if (!generic_iv_tbl) return 0;
|
|
if (!st_lookup(generic_iv_tbl, obj, (st_data_t *)&tbl)) return 0;
|
|
status = st_delete(tbl, &id, valp);
|
|
if (tbl->num_entries == 0) {
|
|
st_delete(generic_iv_tbl, &obj, (st_data_t *)&tbl);
|
|
st_free_table(tbl);
|
|
}
|
|
return status;
|
|
}
|
|
|
|
void
|
|
rb_mark_generic_ivar(obj)
|
|
VALUE obj;
|
|
{
|
|
st_table *tbl;
|
|
|
|
if (!generic_iv_tbl) return;
|
|
if (st_lookup(generic_iv_tbl, obj, (st_data_t *)&tbl)) {
|
|
rb_mark_tbl(tbl);
|
|
}
|
|
}
|
|
|
|
static int
|
|
givar_mark_i(key, value)
|
|
ID key;
|
|
VALUE value;
|
|
{
|
|
rb_gc_mark(value);
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
static int
|
|
givar_i(obj, tbl)
|
|
VALUE obj;
|
|
st_table *tbl;
|
|
{
|
|
if (rb_special_const_p(obj)) {
|
|
st_foreach(tbl, givar_mark_i, 0);
|
|
}
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
void
|
|
rb_mark_generic_ivar_tbl()
|
|
{
|
|
if (!generic_iv_tbl) return;
|
|
if (special_generic_ivar == 0) return;
|
|
st_foreach(generic_iv_tbl, givar_i, 0);
|
|
}
|
|
|
|
void
|
|
rb_free_generic_ivar(obj)
|
|
VALUE obj;
|
|
{
|
|
st_table *tbl;
|
|
|
|
if (st_delete(generic_iv_tbl, &obj, (st_data_t *)&tbl))
|
|
st_free_table(tbl);
|
|
}
|
|
|
|
void
|
|
rb_copy_generic_ivar(clone, obj)
|
|
VALUE clone, obj;
|
|
{
|
|
st_table *tbl;
|
|
|
|
if (!generic_iv_tbl) return;
|
|
if (!FL_TEST(obj, FL_EXIVAR)) return;
|
|
if (st_lookup(generic_iv_tbl, obj, (st_data_t *)&tbl)) {
|
|
st_table *old;
|
|
|
|
if (st_lookup(generic_iv_tbl, clone, (st_data_t *)&old)) {
|
|
st_free_table(old);
|
|
st_insert(generic_iv_tbl, clone, (st_data_t)st_copy(tbl));
|
|
}
|
|
else {
|
|
st_add_direct(generic_iv_tbl, clone, (st_data_t)st_copy(tbl));
|
|
FL_SET(clone, FL_EXIVAR);
|
|
}
|
|
}
|
|
}
|
|
|
|
static VALUE
|
|
ivar_get(obj, id, warn)
|
|
VALUE obj;
|
|
ID id;
|
|
int warn;
|
|
{
|
|
VALUE val;
|
|
|
|
switch (TYPE(obj)) {
|
|
case T_OBJECT:
|
|
case T_CLASS:
|
|
case T_MODULE:
|
|
if (ROBJECT(obj)->iv_tbl && st_lookup(ROBJECT(obj)->iv_tbl, id, &val))
|
|
return val;
|
|
break;
|
|
default:
|
|
if (FL_TEST(obj, FL_EXIVAR) || rb_special_const_p(obj))
|
|
return generic_ivar_get(obj, id);
|
|
break;
|
|
}
|
|
if (warn && ruby_verbose) {
|
|
rb_warning("instance variable %s not initialized", rb_id2name(id));
|
|
}
|
|
|
|
return Qnil;
|
|
}
|
|
|
|
VALUE
|
|
rb_ivar_get(obj, id)
|
|
VALUE obj;
|
|
ID id;
|
|
{
|
|
return ivar_get(obj, id, Qtrue);
|
|
}
|
|
|
|
VALUE
|
|
rb_attr_get(obj, id)
|
|
VALUE obj;
|
|
ID id;
|
|
{
|
|
return ivar_get(obj, id, Qfalse);
|
|
}
|
|
|
|
VALUE
|
|
rb_ivar_set(obj, id, val)
|
|
VALUE obj;
|
|
ID id;
|
|
VALUE val;
|
|
{
|
|
if (!OBJ_TAINTED(obj) && rb_safe_level() >= 4)
|
|
rb_raise(rb_eSecurityError, "Insecure: can't modify instance variable");
|
|
if (OBJ_FROZEN(obj)) rb_error_frozen("object");
|
|
switch (TYPE(obj)) {
|
|
case T_OBJECT:
|
|
case T_CLASS:
|
|
case T_MODULE:
|
|
if (!ROBJECT(obj)->iv_tbl) ROBJECT(obj)->iv_tbl = st_init_numtable();
|
|
st_insert(ROBJECT(obj)->iv_tbl, id, val);
|
|
break;
|
|
default:
|
|
generic_ivar_set(obj, id, val);
|
|
break;
|
|
}
|
|
return val;
|
|
}
|
|
|
|
VALUE
|
|
rb_ivar_defined(obj, id)
|
|
VALUE obj;
|
|
ID id;
|
|
{
|
|
switch (TYPE(obj)) {
|
|
case T_OBJECT:
|
|
case T_CLASS:
|
|
case T_MODULE:
|
|
if (ROBJECT(obj)->iv_tbl && st_lookup(ROBJECT(obj)->iv_tbl, id, 0))
|
|
return Qtrue;
|
|
break;
|
|
default:
|
|
if (FL_TEST(obj, FL_EXIVAR) || rb_special_const_p(obj))
|
|
return generic_ivar_defined(obj, id);
|
|
break;
|
|
}
|
|
return Qfalse;
|
|
}
|
|
|
|
static int
|
|
ivar_i(key, entry, ary)
|
|
ID key;
|
|
struct global_entry *entry;
|
|
VALUE ary;
|
|
{
|
|
if (rb_is_instance_id(key)) {
|
|
rb_ary_push(ary, rb_str_new2(rb_id2name(key)));
|
|
}
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* obj.instance_variables => array
|
|
*
|
|
* Returns an array of instance variable names for the receiver. Note
|
|
* that simply defining an accessor does not create the corresponding
|
|
* instance variable.
|
|
*
|
|
* class Fred
|
|
* attr_accessor :a1
|
|
* def initialize
|
|
* @iv = 3
|
|
* end
|
|
* end
|
|
* Fred.new.instance_variables #=> ["@iv"]
|
|
*/
|
|
|
|
VALUE
|
|
rb_obj_instance_variables(obj)
|
|
VALUE obj;
|
|
{
|
|
VALUE ary;
|
|
|
|
ary = rb_ary_new();
|
|
switch (TYPE(obj)) {
|
|
case T_OBJECT:
|
|
case T_CLASS:
|
|
case T_MODULE:
|
|
if (ROBJECT(obj)->iv_tbl) {
|
|
st_foreach(ROBJECT(obj)->iv_tbl, ivar_i, ary);
|
|
}
|
|
break;
|
|
default:
|
|
if (!generic_iv_tbl) break;
|
|
if (FL_TEST(obj, FL_EXIVAR) || rb_special_const_p(obj)) {
|
|
st_table *tbl;
|
|
|
|
if (st_lookup(generic_iv_tbl, obj, (st_data_t *)&tbl)) {
|
|
st_foreach(tbl, ivar_i, ary);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* obj.remove_instance_variable(symbol) => obj
|
|
*
|
|
* Removes the named instance variable from <i>obj</i>, returning that
|
|
* variable's value.
|
|
*
|
|
* class Dummy
|
|
* attr_reader :var
|
|
* def initialize
|
|
* @var = 99
|
|
* end
|
|
* def remove
|
|
* remove_instance_variable(:@var)
|
|
* end
|
|
* end
|
|
* d = Dummy.new
|
|
* d.var #=> 99
|
|
* d.remove #=> 99
|
|
* d.var #=> nil
|
|
*/
|
|
|
|
VALUE
|
|
rb_obj_remove_instance_variable(obj, name)
|
|
VALUE obj, name;
|
|
{
|
|
VALUE val = Qnil;
|
|
ID id = rb_to_id(name);
|
|
|
|
if (!OBJ_TAINTED(obj) && rb_safe_level() >= 4)
|
|
rb_raise(rb_eSecurityError, "Insecure: can't modify instance variable");
|
|
if (OBJ_FROZEN(obj)) rb_error_frozen("object");
|
|
if (!rb_is_instance_id(id)) {
|
|
rb_name_error(id, "`%s' is not allowed as an instance variable name", rb_id2name(id));
|
|
}
|
|
|
|
switch (TYPE(obj)) {
|
|
case T_OBJECT:
|
|
case T_CLASS:
|
|
case T_MODULE:
|
|
if (ROBJECT(obj)->iv_tbl && st_delete(ROBJECT(obj)->iv_tbl, (st_data_t*)&id, &val)) {
|
|
return val;
|
|
}
|
|
break;
|
|
default:
|
|
if (FL_TEST(obj, FL_EXIVAR) || rb_special_const_p(obj)) {
|
|
if (generic_ivar_remove(obj, id, &val)) {
|
|
return val;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
rb_name_error(id, "instance variable %s not defined", rb_id2name(id));
|
|
return Qnil; /* not reached */
|
|
}
|
|
|
|
NORETURN(static void uninitialized_constant _((VALUE, ID)));
|
|
static void
|
|
uninitialized_constant(klass, id)
|
|
VALUE klass;
|
|
ID id;
|
|
{
|
|
if (klass && klass != rb_cObject)
|
|
rb_name_error(id, "uninitialized constant %s::%s",
|
|
rb_class2name(klass),
|
|
rb_id2name(id));
|
|
else {
|
|
rb_name_error(id, "uninitialized constant %s", rb_id2name(id));
|
|
}
|
|
}
|
|
|
|
static VALUE
|
|
const_missing(klass, id)
|
|
VALUE klass;
|
|
ID id;
|
|
{
|
|
return rb_funcall(klass, rb_intern("const_missing"), 1, ID2SYM(id));
|
|
}
|
|
|
|
|
|
/*
|
|
* call-seq:
|
|
* mod.const_missing(sym) => obj
|
|
*
|
|
* Invoked when a reference is made to an undefined constant in
|
|
* <i>mod</i>. It is passed a symbol for the undefined constant, and
|
|
* returns a value to be used for that constant. The
|
|
* following code is a (very bad) example: if reference is made to
|
|
* an undefined constant, it attempts to load a file whose name is
|
|
* the lowercase version of the constant (thus class <code>Fred</code> is
|
|
* assumed to be in file <code>fred.rb</code>). If found, it returns the
|
|
* value of the loaded class. It therefore implements a perverse
|
|
* kind of autoload facility.
|
|
*
|
|
* def Object.const_missing(name)
|
|
* @looked_for ||= {}
|
|
* str_name = name.to_s
|
|
* raise "Class not found: #{name}" if @looked_for[str_name]
|
|
* @looked_for[str_name] = 1
|
|
* file = str_name.downcase
|
|
* require file
|
|
* klass = const_get(name)
|
|
* return klass if klass
|
|
* raise "Class not found: #{name}"
|
|
* end
|
|
*
|
|
*/
|
|
|
|
VALUE
|
|
rb_mod_const_missing(klass, name)
|
|
VALUE klass, name;
|
|
{
|
|
ruby_frame = ruby_frame->prev; /* pop frame for "const_missing" */
|
|
uninitialized_constant(klass, rb_to_id(name));
|
|
return Qnil; /* not reached */
|
|
}
|
|
|
|
static struct st_table *
|
|
check_autoload_table(av)
|
|
VALUE av;
|
|
{
|
|
Check_Type(av, T_DATA);
|
|
if (RDATA(av)->dmark != (RUBY_DATA_FUNC)rb_mark_tbl ||
|
|
RDATA(av)->dfree != (RUBY_DATA_FUNC)st_free_table) {
|
|
rb_raise(rb_eTypeError, "wrong autoload table: %s", RSTRING(rb_inspect(av))->ptr);
|
|
}
|
|
return (struct st_table *)DATA_PTR(av);
|
|
}
|
|
|
|
void
|
|
rb_autoload(mod, id, file)
|
|
VALUE mod;
|
|
ID id;
|
|
const char *file;
|
|
{
|
|
VALUE av, fn;
|
|
struct st_table *tbl;
|
|
|
|
if (!rb_is_const_id(id)) {
|
|
rb_raise(rb_eNameError, "autoload must be constant name", rb_id2name(id));
|
|
}
|
|
if (!file || !*file) {
|
|
rb_raise(rb_eArgError, "empty file name");
|
|
}
|
|
|
|
if ((tbl = RCLASS(mod)->iv_tbl) && st_lookup(tbl, id, &av) && av != Qundef)
|
|
return;
|
|
|
|
rb_const_set(mod, id, Qundef);
|
|
tbl = RCLASS(mod)->iv_tbl;
|
|
if (st_lookup(tbl, autoload, &av)) {
|
|
tbl = check_autoload_table(av);
|
|
}
|
|
else {
|
|
av = Data_Wrap_Struct(rb_cData, rb_mark_tbl, st_free_table, 0);
|
|
st_add_direct(tbl, autoload, av);
|
|
DATA_PTR(av) = tbl = st_init_numtable();
|
|
}
|
|
fn = rb_str_new2(file);
|
|
FL_UNSET(fn, FL_TAINT);
|
|
OBJ_FREEZE(fn);
|
|
st_insert(tbl, id, (st_data_t)rb_node_newnode(NODE_MEMO, fn, ruby_safe_level, 0));
|
|
}
|
|
|
|
static NODE*
|
|
autoload_delete(mod, id)
|
|
VALUE mod;
|
|
ID id;
|
|
{
|
|
VALUE val;
|
|
st_data_t load = 0;
|
|
|
|
st_delete(RCLASS(mod)->iv_tbl, (st_data_t*)&id, 0);
|
|
if (st_lookup(RCLASS(mod)->iv_tbl, autoload, &val)) {
|
|
struct st_table *tbl = check_autoload_table(val);
|
|
|
|
st_delete(tbl, (st_data_t*)&id, &load);
|
|
|
|
if (tbl->num_entries == 0) {
|
|
DATA_PTR(val) = 0;
|
|
st_free_table(tbl);
|
|
id = autoload;
|
|
if (st_delete(RCLASS(mod)->iv_tbl, (st_data_t*)&id, &val)) {
|
|
rb_gc_force_recycle(val);
|
|
}
|
|
}
|
|
}
|
|
|
|
return (NODE *)load;
|
|
}
|
|
|
|
void
|
|
rb_autoload_load(klass, id)
|
|
VALUE klass;
|
|
ID id;
|
|
{
|
|
VALUE file;
|
|
NODE *load = autoload_delete(klass, id);
|
|
|
|
if (!load || !(file = load->nd_lit) || rb_provided(RSTRING(file)->ptr)) {
|
|
const_missing(klass, id);
|
|
}
|
|
rb_require_safe(file, load->nd_nth);
|
|
}
|
|
|
|
static VALUE
|
|
autoload_file(mod, id)
|
|
VALUE mod;
|
|
ID id;
|
|
{
|
|
VALUE val, file;
|
|
struct st_table *tbl;
|
|
st_data_t load;
|
|
|
|
if (!st_lookup(RCLASS(mod)->iv_tbl, autoload, &val) ||
|
|
!(tbl = check_autoload_table(val)) || !st_lookup(tbl, id, &load)) {
|
|
return Qnil;
|
|
}
|
|
file = ((NODE *)load)->nd_lit;
|
|
Check_Type(file, T_STRING);
|
|
if (!RSTRING(file)->ptr) {
|
|
rb_raise(rb_eArgError, "empty file name");
|
|
}
|
|
if (!rb_provided(RSTRING(file)->ptr)) {
|
|
return file;
|
|
}
|
|
|
|
/* already loaded but not defined */
|
|
st_delete(tbl, (st_data_t*)&id, 0);
|
|
if (!tbl->num_entries) {
|
|
DATA_PTR(val) = 0;
|
|
st_free_table(tbl);
|
|
id = autoload;
|
|
if (st_delete(RCLASS(mod)->iv_tbl, (st_data_t*)&id, &val)) {
|
|
rb_gc_force_recycle(val);
|
|
}
|
|
}
|
|
return Qnil;
|
|
}
|
|
|
|
VALUE
|
|
rb_autoload_p(mod, id)
|
|
VALUE mod;
|
|
ID id;
|
|
{
|
|
struct st_table *tbl = RCLASS(mod)->iv_tbl;
|
|
VALUE val;
|
|
|
|
if (!tbl || !st_lookup(tbl, id, &val) || val != Qundef) {
|
|
return Qnil;
|
|
}
|
|
return autoload_file(mod, id);
|
|
}
|
|
|
|
static VALUE
|
|
rb_const_get_0(klass, id, exclude, recurse)
|
|
VALUE klass;
|
|
ID id;
|
|
int exclude, recurse;
|
|
{
|
|
VALUE value, tmp;
|
|
int mod_retry = 0;
|
|
|
|
tmp = klass;
|
|
retry:
|
|
while (tmp) {
|
|
while (RCLASS(tmp)->iv_tbl && st_lookup(RCLASS(tmp)->iv_tbl,id,&value)) {
|
|
if (value == Qundef) {
|
|
rb_autoload_load(tmp, id);
|
|
continue;
|
|
}
|
|
if (exclude && tmp == rb_cObject && klass != rb_cObject) {
|
|
rb_warn("toplevel constant %s referenced by %s::%s",
|
|
rb_id2name(id), rb_class2name(klass), rb_id2name(id));
|
|
}
|
|
return value;
|
|
}
|
|
if (!recurse && klass != rb_cObject) break;
|
|
tmp = RCLASS(tmp)->super;
|
|
}
|
|
if (!exclude && !mod_retry && BUILTIN_TYPE(klass) == T_MODULE) {
|
|
mod_retry = 1;
|
|
tmp = rb_cObject;
|
|
goto retry;
|
|
}
|
|
|
|
return const_missing(klass, id);
|
|
}
|
|
|
|
VALUE
|
|
rb_const_get_from(klass, id)
|
|
VALUE klass;
|
|
ID id;
|
|
{
|
|
return rb_const_get_0(klass, id, Qtrue, Qtrue);
|
|
}
|
|
|
|
VALUE
|
|
rb_const_get(klass, id)
|
|
VALUE klass;
|
|
ID id;
|
|
{
|
|
return rb_const_get_0(klass, id, Qfalse, Qtrue);
|
|
}
|
|
|
|
VALUE
|
|
rb_const_get_at(klass, id)
|
|
VALUE klass;
|
|
ID id;
|
|
{
|
|
return rb_const_get_0(klass, id, Qtrue, Qfalse);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* remove_const(sym) => obj
|
|
*
|
|
* Removes the definition of the given constant, returning that
|
|
* constant's value. Predefined classes and singleton objects (such as
|
|
* <i>true</i>) cannot be removed.
|
|
*/
|
|
|
|
VALUE
|
|
rb_mod_remove_const(mod, name)
|
|
VALUE mod, name;
|
|
{
|
|
ID id = rb_to_id(name);
|
|
VALUE val;
|
|
|
|
if (!rb_is_const_id(id)) {
|
|
rb_name_error(id, "`%s' is not allowed as a constant name", rb_id2name(id));
|
|
}
|
|
if (!OBJ_TAINTED(mod) && rb_safe_level() >= 4)
|
|
rb_raise(rb_eSecurityError, "Insecure: can't remove constant");
|
|
if (OBJ_FROZEN(mod)) rb_error_frozen("class/module");
|
|
|
|
if (RCLASS(mod)->iv_tbl && st_delete(ROBJECT(mod)->iv_tbl, (st_data_t*)&id, &val)) {
|
|
if (val == Qundef) {
|
|
autoload_delete(mod, id);
|
|
val = Qnil;
|
|
}
|
|
return val;
|
|
}
|
|
if (rb_const_defined_at(mod, id)) {
|
|
rb_name_error(id, "cannot remove %s::%s",
|
|
rb_class2name(mod), rb_id2name(id));
|
|
}
|
|
rb_name_error(id, "constant %s::%s not defined",
|
|
rb_class2name(mod), rb_id2name(id));
|
|
return Qnil; /* not reached */
|
|
}
|
|
|
|
static int
|
|
sv_i(key, value, tbl)
|
|
ID key;
|
|
VALUE value;
|
|
st_table *tbl;
|
|
{
|
|
if (rb_is_const_id(key)) {
|
|
if (!st_lookup(tbl, key, 0)) {
|
|
st_insert(tbl, key, key);
|
|
}
|
|
}
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
void*
|
|
rb_mod_const_at(mod, data)
|
|
VALUE mod;
|
|
void *data;
|
|
{
|
|
st_table *tbl = data;
|
|
if (!tbl) {
|
|
tbl = st_init_numtable();
|
|
}
|
|
if (RCLASS(mod)->iv_tbl) {
|
|
st_foreach(RCLASS(mod)->iv_tbl, sv_i, (st_data_t)tbl);
|
|
}
|
|
return tbl;
|
|
}
|
|
|
|
void*
|
|
rb_mod_const_of(mod, data)
|
|
VALUE mod;
|
|
void *data;
|
|
{
|
|
VALUE tmp = mod;
|
|
for (;;) {
|
|
data = rb_mod_const_at(tmp, data);
|
|
tmp = RCLASS(tmp)->super;
|
|
if (!tmp) break;
|
|
if (tmp == rb_cObject && mod != rb_cObject) break;
|
|
}
|
|
return data;
|
|
}
|
|
|
|
static int
|
|
list_i(key, value, ary)
|
|
ID key, value;
|
|
VALUE ary;
|
|
{
|
|
rb_ary_push(ary, rb_str_new2(rb_id2name(key)));
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
VALUE
|
|
rb_const_list(data)
|
|
void *data;
|
|
{
|
|
st_table *tbl = data;
|
|
VALUE ary;
|
|
|
|
if (!tbl) return rb_ary_new2(0);
|
|
ary = rb_ary_new2(tbl->num_entries);
|
|
st_foreach(tbl, list_i, ary);
|
|
st_free_table(tbl);
|
|
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* mod.constants => array
|
|
*
|
|
* Returns an array of the names of the constants accessible in
|
|
* <i>mod</i>. This includes the names of constants in any included
|
|
* modules (example at start of section).
|
|
*/
|
|
|
|
VALUE
|
|
rb_mod_constants(mod)
|
|
VALUE mod;
|
|
{
|
|
return rb_const_list(rb_mod_const_of(mod, 0));
|
|
}
|
|
|
|
static int
|
|
rb_const_defined_0(klass, id, exclude, recurse)
|
|
VALUE klass;
|
|
ID id;
|
|
int exclude, recurse;
|
|
{
|
|
VALUE value, tmp;
|
|
int mod_retry = 0;
|
|
|
|
tmp = klass;
|
|
retry:
|
|
while (tmp) {
|
|
if (RCLASS(tmp)->iv_tbl && st_lookup(RCLASS(tmp)->iv_tbl, id, &value)) {
|
|
if (value == Qundef && NIL_P(autoload_file(klass, id)))
|
|
return Qfalse;
|
|
return Qtrue;
|
|
}
|
|
if (!recurse && klass != rb_cObject) break;
|
|
tmp = RCLASS(tmp)->super;
|
|
}
|
|
if (!exclude && !mod_retry && BUILTIN_TYPE(klass) == T_MODULE) {
|
|
mod_retry = 1;
|
|
tmp = rb_cObject;
|
|
goto retry;
|
|
}
|
|
return Qfalse;
|
|
}
|
|
|
|
int
|
|
rb_const_defined_from(klass, id)
|
|
VALUE klass;
|
|
ID id;
|
|
{
|
|
return rb_const_defined_0(klass, id, Qtrue, Qtrue);
|
|
}
|
|
|
|
int
|
|
rb_const_defined(klass, id)
|
|
VALUE klass;
|
|
ID id;
|
|
{
|
|
return rb_const_defined_0(klass, id, Qfalse, Qtrue);
|
|
}
|
|
|
|
int
|
|
rb_const_defined_at(klass, id)
|
|
VALUE klass;
|
|
ID id;
|
|
{
|
|
return rb_const_defined_0(klass, id, Qtrue, Qfalse);
|
|
}
|
|
|
|
static void
|
|
mod_av_set(klass, id, val, isconst)
|
|
VALUE klass;
|
|
ID id;
|
|
VALUE val;
|
|
int isconst;
|
|
{
|
|
char *dest = isconst ? "constant" : "class variable";
|
|
|
|
if (!OBJ_TAINTED(klass) && rb_safe_level() >= 4)
|
|
rb_raise(rb_eSecurityError, "Insecure: can't set %s", dest);
|
|
if (OBJ_FROZEN(klass)) {
|
|
if (BUILTIN_TYPE(klass) == T_MODULE) {
|
|
rb_error_frozen("module");
|
|
}
|
|
else {
|
|
rb_error_frozen("class");
|
|
}
|
|
}
|
|
if (!RCLASS(klass)->iv_tbl) {
|
|
RCLASS(klass)->iv_tbl = st_init_numtable();
|
|
}
|
|
else if (isconst) {
|
|
VALUE value = Qfalse;
|
|
|
|
if (st_lookup(RCLASS(klass)->iv_tbl, id, &value)) {
|
|
if (value == Qundef)
|
|
autoload_delete(klass, id);
|
|
else
|
|
rb_warn("already initialized %s %s", dest, rb_id2name(id));
|
|
}
|
|
}
|
|
|
|
st_insert(RCLASS(klass)->iv_tbl, id, val);
|
|
}
|
|
|
|
void
|
|
rb_const_set(klass, id, val)
|
|
VALUE klass;
|
|
ID id;
|
|
VALUE val;
|
|
{
|
|
mod_av_set(klass, id, val, Qtrue);
|
|
}
|
|
|
|
void
|
|
rb_define_const(klass, name, val)
|
|
VALUE klass;
|
|
const char *name;
|
|
VALUE val;
|
|
{
|
|
ID id = rb_intern(name);
|
|
|
|
if (!rb_is_const_id(id)) {
|
|
rb_warn("rb_define_const: invalide name `%s' for constant", name);
|
|
}
|
|
if (klass == rb_cObject) {
|
|
rb_secure(4);
|
|
}
|
|
rb_const_set(klass, id, val);
|
|
}
|
|
|
|
void
|
|
rb_define_global_const(name, val)
|
|
const char *name;
|
|
VALUE val;
|
|
{
|
|
rb_define_const(rb_cObject, name, val);
|
|
}
|
|
|
|
static VALUE
|
|
original_module(c)
|
|
VALUE c;
|
|
{
|
|
if (TYPE(c) == T_ICLASS)
|
|
return RBASIC(c)->klass;
|
|
return c;
|
|
}
|
|
|
|
void
|
|
rb_cvar_set(klass, id, val, warn)
|
|
VALUE klass;
|
|
ID id;
|
|
VALUE val;
|
|
int warn;
|
|
{
|
|
mod_av_set(klass, id, val, Qfalse);
|
|
}
|
|
|
|
VALUE
|
|
rb_cvar_get(klass, id)
|
|
VALUE klass;
|
|
ID id;
|
|
{
|
|
VALUE value;
|
|
VALUE tmp;
|
|
|
|
if (RCLASS(klass)->iv_tbl && st_lookup(RCLASS(klass)->iv_tbl,id,&value)) {
|
|
return value;
|
|
}
|
|
|
|
rb_name_error(id,"uninitialized class variable %s in %s",
|
|
rb_id2name(id), rb_class2name(klass));
|
|
return Qnil; /* not reached */
|
|
}
|
|
|
|
VALUE
|
|
rb_cvar_defined(klass, id)
|
|
VALUE klass;
|
|
ID id;
|
|
{
|
|
if (RCLASS(klass)->iv_tbl && st_lookup(RCLASS(klass)->iv_tbl,id,0)) {
|
|
return Qtrue;
|
|
}
|
|
return Qfalse;
|
|
}
|
|
|
|
void
|
|
rb_cv_set(klass, name, val)
|
|
VALUE klass;
|
|
const char *name;
|
|
VALUE val;
|
|
{
|
|
ID id = rb_intern(name);
|
|
if (!rb_is_class_id(id)) {
|
|
rb_name_error(id, "wrong class variable name %s", name);
|
|
}
|
|
rb_cvar_set(klass, id, val, Qfalse);
|
|
}
|
|
|
|
VALUE
|
|
rb_cv_get(klass, name)
|
|
VALUE klass;
|
|
const char *name;
|
|
{
|
|
ID id = rb_intern(name);
|
|
if (!rb_is_class_id(id)) {
|
|
rb_name_error(id, "wrong class variable name %s", name);
|
|
}
|
|
return rb_cvar_get(klass, id);
|
|
}
|
|
|
|
void
|
|
rb_define_class_variable(klass, name, val)
|
|
VALUE klass;
|
|
const char *name;
|
|
VALUE val;
|
|
{
|
|
ID id = rb_intern(name);
|
|
|
|
if (!rb_is_class_id(id)) {
|
|
rb_name_error(id, "wrong class variable name %s", name);
|
|
}
|
|
rb_cvar_set(klass, id, val, Qtrue);
|
|
}
|
|
|
|
static int
|
|
cv_i(key, value, ary)
|
|
ID key;
|
|
VALUE value;
|
|
VALUE ary;
|
|
{
|
|
if (rb_is_class_id(key)) {
|
|
VALUE kval = rb_str_new2(rb_id2name(key));
|
|
if (!rb_ary_includes(ary, kval)) {
|
|
rb_ary_push(ary, kval);
|
|
}
|
|
}
|
|
return ST_CONTINUE;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* mod.class_variables => array
|
|
*
|
|
* Returns an array of the names of class variables in <i>mod</i> and
|
|
* the ancestors of <i>mod</i>.
|
|
*
|
|
* class One
|
|
* @@var1 = 1
|
|
* end
|
|
* class Two < One
|
|
* @@var2 = 2
|
|
* end
|
|
* One.class_variables #=> ["@@var1"]
|
|
* Two.class_variables #=> ["@@var2", "@@var1"]
|
|
*/
|
|
|
|
VALUE
|
|
rb_mod_class_variables(obj)
|
|
VALUE obj;
|
|
{
|
|
VALUE ary = rb_ary_new();
|
|
|
|
for (;;) {
|
|
if (RCLASS(obj)->iv_tbl) {
|
|
st_foreach(RCLASS(obj)->iv_tbl, cv_i, ary);
|
|
}
|
|
obj = RCLASS(obj)->super;
|
|
if (!obj) break;
|
|
}
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* remove_class_variable(sym) => obj
|
|
*
|
|
* Removes the definition of the <i>sym</i>, returning that
|
|
* constant's value.
|
|
*
|
|
* class Dummy
|
|
* @@var = 99
|
|
* puts @@var
|
|
* remove_class_variable(:@@var)
|
|
* puts(defined? @@var)
|
|
* end
|
|
*
|
|
* <em>produces:</em>
|
|
*
|
|
* 99
|
|
* nil
|
|
*/
|
|
|
|
VALUE
|
|
rb_mod_remove_cvar(mod, name)
|
|
VALUE mod, name;
|
|
{
|
|
ID id = rb_to_id(name);
|
|
VALUE val;
|
|
|
|
if (!rb_is_class_id(id)) {
|
|
rb_name_error(id, "wrong class variable name %s", rb_id2name(id));
|
|
}
|
|
if (!OBJ_TAINTED(mod) && rb_safe_level() >= 4)
|
|
rb_raise(rb_eSecurityError, "Insecure: can't remove class variable");
|
|
if (OBJ_FROZEN(mod)) rb_error_frozen("class/module");
|
|
|
|
if (RCLASS(mod)->iv_tbl && st_delete(ROBJECT(mod)->iv_tbl, (st_data_t*)&id, &val)) {
|
|
return val;
|
|
}
|
|
if (rb_cvar_defined(mod, id)) {
|
|
rb_name_error(id, "cannot remove %s for %s",
|
|
rb_id2name(id), rb_class2name(mod));
|
|
}
|
|
rb_name_error(id, "class variable %s not defined for %s",
|
|
rb_id2name(id), rb_class2name(mod));
|
|
return Qnil; /* not reached */
|
|
}
|
|
|
|
VALUE
|
|
rb_iv_get(obj, name)
|
|
VALUE obj;
|
|
const char *name;
|
|
{
|
|
ID id = rb_intern(name);
|
|
|
|
return rb_ivar_get(obj, id);
|
|
}
|
|
|
|
VALUE
|
|
rb_iv_set(obj, name, val)
|
|
VALUE obj;
|
|
const char *name;
|
|
VALUE val;
|
|
{
|
|
ID id = rb_intern(name);
|
|
|
|
return rb_ivar_set(obj, id, val);
|
|
}
|