diff options
Diffstat (limited to 'eval_method.c')
-rw-r--r-- | eval_method.c | 654 |
1 files changed, 0 insertions, 654 deletions
diff --git a/eval_method.c b/eval_method.c deleted file mode 100644 index de315a6682..0000000000 --- a/eval_method.c +++ /dev/null @@ -1,654 +0,0 @@ -/* -*-c-*- */ -/* - * This file is included by eval.c - */ - -#define CACHE_SIZE 0x800 -#define CACHE_MASK 0x7ff -#define EXPR1(c,m) ((((c)>>3)^(m))&CACHE_MASK) - -struct cache_entry { /* method hash table. */ - ID mid; /* method's id */ - ID mid0; /* method's original id */ - VALUE klass; /* receiver's class */ - VALUE oklass; /* original's class */ - NODE *method; -}; - -static struct cache_entry cache[CACHE_SIZE]; -static int ruby_running = 0; - -void -rb_clear_cache(void) -{ - struct cache_entry *ent, *end; - - rb_vm_change_state(); - - if (!ruby_running) - return; - ent = cache; - end = ent + CACHE_SIZE; - while (ent < end) { - ent->mid = 0; - ent++; - } -} - -static void -rb_clear_cache_for_undef(VALUE klass, ID id) -{ - struct cache_entry *ent, *end; - - rb_vm_change_state(); - - if (!ruby_running) - return; - ent = cache; - end = ent + CACHE_SIZE; - while (ent < end) { - if (ent->oklass == klass && ent->mid == id) { - ent->mid = 0; - } - ent++; - } -} - -static void -rb_clear_cache_by_id(ID id) -{ - struct cache_entry *ent, *end; - - rb_vm_change_state(); - - if (!ruby_running) - return; - ent = cache; - end = ent + CACHE_SIZE; - while (ent < end) { - if (ent->mid == id) { - ent->mid = 0; - } - ent++; - } -} - -void -rb_clear_cache_by_class(VALUE klass) -{ - struct cache_entry *ent, *end; - - rb_vm_change_state(); - - if (!ruby_running) - return; - ent = cache; - end = ent + CACHE_SIZE; - while (ent < end) { - if (ent->klass == klass || ent->oklass == klass) { - ent->mid = 0; - } - ent++; - } -} - -void -rb_add_method(VALUE klass, ID mid, NODE * node, int noex) -{ - NODE *body; - - if (NIL_P(klass)) { - klass = rb_cObject; - } - if (rb_safe_level() >= 4 && (klass == rb_cObject || !OBJ_TAINTED(klass))) { - rb_raise(rb_eSecurityError, "Insecure: can't define method"); - } - if (!FL_TEST(klass, FL_SINGLETON) && - node && nd_type(node) != NODE_ZSUPER && - (mid == rb_intern("initialize") || mid == rb_intern("initialize_copy"))) { - noex = NOEX_PRIVATE | noex; - } - else if (FL_TEST(klass, FL_SINGLETON) && node - && nd_type(node) == NODE_CFUNC && mid == rb_intern("allocate")) { - rb_warn - ("defining %s.allocate is deprecated; use rb_define_alloc_func()", - rb_class2name(rb_iv_get(klass, "__attached__"))); - mid = ID_ALLOCATOR; - } - if (OBJ_FROZEN(klass)) { - rb_error_frozen("class/module"); - } - rb_clear_cache_by_id(mid); - - /* - * NODE_METHOD (NEW_METHOD(body, klass, vis)): - * nd_body : method body // (2) // mark - * nd_clss : klass // (1) // mark - * nd_noex : visibility // (3) - * - * NODE_FBODY (NEW_FBODY(method, alias)): - * nd_body : method (NODE_METHOD) // (2) // mark - * nd_oid : original id // (1) - * nd_cnt : alias count // (3) - */ - if (node) { - body = NEW_FBODY(NEW_METHOD(node, klass, NOEX_WITH_SAFE(noex)), 0); - } - else { - body = 0; - } - - { - /* check re-definition */ - st_data_t data; - NODE *old_node; - - if (st_lookup(RCLASS_M_TBL(klass), mid, &data)) { - old_node = (NODE *)data; - if (old_node) { - if (nd_type(old_node->nd_body->nd_body) == NODE_CFUNC) { - rb_vm_check_redefinition_opt_method(old_node); - } - if (RTEST(ruby_verbose) && node && old_node->nd_cnt == 0 && old_node->nd_body) { - rb_warning("method redefined; discarding old %s", rb_id2name(mid)); - } - } - } - if (klass == rb_cObject && node && mid == init) { - rb_warn("redefining Object#initialize may cause infinite loop"); - } - - if (mid == object_id || mid == __send__) { - if (node && nd_type(node) == RUBY_VM_METHOD_NODE) { - rb_warn("redefining `%s' may cause serious problem", - rb_id2name(mid)); - } - } - } - - st_insert(RCLASS_M_TBL(klass), mid, (st_data_t) body); - - if (node && mid != ID_ALLOCATOR && ruby_running) { - if (FL_TEST(klass, FL_SINGLETON)) { - rb_funcall(rb_iv_get(klass, "__attached__"), singleton_added, 1, - ID2SYM(mid)); - } - else { - rb_funcall(klass, added, 1, ID2SYM(mid)); - } - } -} - -void -rb_define_alloc_func(VALUE klass, VALUE (*func)(VALUE)) -{ - Check_Type(klass, T_CLASS); - rb_add_method(rb_singleton_class(klass), ID_ALLOCATOR, NEW_CFUNC(func, 0), - NOEX_PRIVATE); -} - -void -rb_undef_alloc_func(VALUE klass) -{ - Check_Type(klass, T_CLASS); - rb_add_method(rb_singleton_class(klass), ID_ALLOCATOR, 0, NOEX_UNDEF); -} - -rb_alloc_func_t -rb_get_alloc_func(VALUE klass) -{ - NODE *n; - Check_Type(klass, T_CLASS); - n = rb_method_node(CLASS_OF(klass), ID_ALLOCATOR); - if (!n) return 0; - if (nd_type(n) != NODE_METHOD) return 0; - n = n->nd_body; - if (nd_type(n) != NODE_CFUNC) return 0; - return (rb_alloc_func_t)n->nd_cfnc; -} - -static NODE * -search_method(VALUE klass, ID id, VALUE *klassp) -{ - st_data_t body; - - if (!klass) { - return 0; - } - - while (!st_lookup(RCLASS_M_TBL(klass), id, &body)) { - klass = RCLASS_SUPER(klass); - if (!klass) - return 0; - } - - if (klassp) { - *klassp = klass; - } - - return (NODE *)body; -} - -/* - * search method body (NODE_METHOD) - * with : klass and id - * without : method cache - * - * if you need method node with method cache, use - * rb_method_node() - */ -NODE * -rb_get_method_body(VALUE klass, ID id, ID *idp) -{ - NODE *volatile fbody, *body; - NODE *method; - - if ((fbody = search_method(klass, id, 0)) == 0 || !fbody->nd_body) { - /* store empty info in cache */ - struct cache_entry *ent; - ent = cache + EXPR1(klass, id); - ent->klass = klass; - ent->mid = ent->mid0 = id; - ent->method = 0; - ent->oklass = 0; - return 0; - } - - method = fbody->nd_body; - - if (ruby_running) { - /* store in cache */ - struct cache_entry *ent; - ent = cache + EXPR1(klass, id); - ent->klass = klass; - ent->mid = id; - ent->mid0 = fbody->nd_oid; - ent->method = body = method; - ent->oklass = method->nd_clss; - } - else { - body = method; - } - - if (idp) { - *idp = fbody->nd_oid; - } - - return body; -} - -NODE * -rb_method_node(VALUE klass, ID id) -{ - struct cache_entry *ent; - - ent = cache + EXPR1(klass, id); - if (ent->mid == id && ent->klass == klass && ent->method) { - return ent->method; - } - - return rb_get_method_body(klass, id, 0); -} - -static void -remove_method(VALUE klass, ID mid) -{ - st_data_t data; - NODE *body = 0; - - if (klass == rb_cObject) { - rb_secure(4); - } - if (rb_safe_level() >= 4 && !OBJ_TAINTED(klass)) { - rb_raise(rb_eSecurityError, "Insecure: can't remove method"); - } - if (OBJ_FROZEN(klass)) - rb_error_frozen("class/module"); - if (mid == object_id || mid == __send__ || mid == init) { - rb_warn("removing `%s' may cause serious problem", rb_id2name(mid)); - } - if (st_lookup(RCLASS_M_TBL(klass), mid, &data)) { - body = (NODE *)data; - if (!body || !body->nd_body) body = 0; - else { - st_delete(RCLASS_M_TBL(klass), &mid, &data); - } - } - if (!body) { - rb_name_error(mid, "method `%s' not defined in %s", - rb_id2name(mid), rb_class2name(klass)); - } - - if (nd_type(body->nd_body->nd_body) == NODE_CFUNC) { - rb_vm_check_redefinition_opt_method(body); - } - - rb_clear_cache_for_undef(klass, mid); - if (FL_TEST(klass, FL_SINGLETON)) { - rb_funcall(rb_iv_get(klass, "__attached__"), singleton_removed, 1, - ID2SYM(mid)); - } - else { - rb_funcall(klass, removed, 1, ID2SYM(mid)); - } -} - -void -rb_remove_method(VALUE klass, const char *name) -{ - remove_method(klass, rb_intern(name)); -} - -/* - * call-seq: - * remove_method(symbol) => self - * - * Removes the method identified by _symbol_ from the current - * class. For an example, see <code>Module.undef_method</code>. - */ - -static VALUE -rb_mod_remove_method(int argc, VALUE *argv, VALUE mod) -{ - int i; - - for (i = 0; i < argc; i++) { - remove_method(mod, rb_to_id(argv[i])); - } - return mod; -} - -#undef rb_disable_super -#undef rb_enable_super - -void -rb_disable_super(VALUE klass, const char *name) -{ - /* obsolete - no use */ -} - -void -rb_enable_super(VALUE klass, const char *name) -{ - rb_warning("rb_enable_super() is obsolete"); -} - -static void -rb_export_method(VALUE klass, ID name, ID noex) -{ - NODE *fbody; - VALUE origin; - - if (klass == rb_cObject) { - rb_secure(4); - } - fbody = search_method(klass, name, &origin); - if (!fbody && TYPE(klass) == T_MODULE) { - fbody = search_method(rb_cObject, name, &origin); - } - if (!fbody || !fbody->nd_body) { - rb_print_undef(klass, name, 0); - } - if (fbody->nd_body->nd_noex != noex) { - if (nd_type(fbody->nd_body->nd_body) == NODE_CFUNC) { - rb_vm_check_redefinition_opt_method(fbody); - } - if (klass == origin) { - fbody->nd_body->nd_noex = noex; - } - else { - rb_add_method(klass, name, NEW_ZSUPER(), noex); - } - } -} - -int -rb_method_boundp(VALUE klass, ID id, int ex) -{ - NODE *method; - - if ((method = rb_method_node(klass, id)) != 0) { - if (ex && (method->nd_noex & NOEX_PRIVATE)) { - return Qfalse; - } - return Qtrue; - } - return Qfalse; -} - -void -rb_attr(VALUE klass, ID id, int read, int write, int ex) -{ - const char *name; - ID attriv; - int noex; - - if (!ex) { - noex = NOEX_PUBLIC; - } - else { - if (SCOPE_TEST(NOEX_PRIVATE)) { - noex = NOEX_PRIVATE; - rb_warning((SCOPE_CHECK(NOEX_MODFUNC)) ? - "attribute accessor as module_function" : - "private attribute?"); - } - else if (SCOPE_TEST(NOEX_PROTECTED)) { - noex = NOEX_PROTECTED; - } - else { - noex = NOEX_PUBLIC; - } - } - - if (!rb_is_local_id(id) && !rb_is_const_id(id)) { - rb_name_error(id, "invalid attribute name `%s'", rb_id2name(id)); - } - name = rb_id2name(id); - if (!name) { - rb_raise(rb_eArgError, "argument needs to be symbol or string"); - } - attriv = rb_intern_str(rb_sprintf("@%s", name)); - if (read) { - rb_add_method(klass, id, NEW_IVAR(attriv), noex); - } - if (write) { - rb_add_method(klass, rb_id_attrset(id), NEW_ATTRSET(attriv), noex); - } -} - -void -rb_undef(VALUE klass, ID id) -{ - VALUE origin; - NODE *body; - - if (rb_vm_cbase() == rb_cObject && klass == rb_cObject) { - rb_secure(4); - } - if (rb_safe_level() >= 4 && !OBJ_TAINTED(klass)) { - rb_raise(rb_eSecurityError, "Insecure: can't undef `%s'", - rb_id2name(id)); - } - rb_frozen_class_p(klass); - if (id == object_id || id == __send__ || id == init) { - rb_warn("undefining `%s' may cause serious problem", rb_id2name(id)); - } - body = search_method(klass, id, &origin); - if (!body || !body->nd_body) { - char *s0 = " class"; - VALUE c = klass; - - if (FL_TEST(c, FL_SINGLETON)) { - VALUE obj = rb_iv_get(klass, "__attached__"); - - switch (TYPE(obj)) { - case T_MODULE: - case T_CLASS: - c = obj; - s0 = ""; - } - } - else if (TYPE(c) == T_MODULE) { - s0 = " module"; - } - rb_name_error(id, "undefined method `%s' for%s `%s'", - rb_id2name(id), s0, rb_class2name(c)); - } - - rb_add_method(klass, id, 0, NOEX_PUBLIC); - - if (FL_TEST(klass, FL_SINGLETON)) { - rb_funcall(rb_iv_get(klass, "__attached__"), - singleton_undefined, 1, ID2SYM(id)); - } - else { - rb_funcall(klass, undefined, 1, ID2SYM(id)); - } -} - -/* - * call-seq: - * undef_method(symbol) => self - * - * Prevents the current class from responding to calls to the named - * method. Contrast this with <code>remove_method</code>, which deletes - * the method from the particular class; Ruby will still search - * superclasses and mixed-in modules for a possible receiver. - * - * class Parent - * def hello - * puts "In parent" - * end - * end - * class Child < Parent - * def hello - * puts "In child" - * end - * end - * - * - * c = Child.new - * c.hello - * - * - * class Child - * remove_method :hello # remove from child, still in parent - * end - * c.hello - * - * - * class Child - * undef_method :hello # prevent any calls to 'hello' - * end - * c.hello - * - * <em>produces:</em> - * - * In child - * In parent - * prog.rb:23: undefined method `hello' for #<Child:0x401b3bb4> (NoMethodError) - */ - -static VALUE -rb_mod_undef_method(int argc, VALUE *argv, VALUE mod) -{ - int i; - for (i = 0; i < argc; i++) { - rb_undef(mod, rb_to_id(argv[i])); - } - return mod; -} - -void -rb_alias(VALUE klass, ID name, ID def) -{ - NODE *orig_fbody, *node; - VALUE singleton = 0; - st_data_t data; - - rb_frozen_class_p(klass); - if (klass == rb_cObject) { - rb_secure(4); - } - orig_fbody = search_method(klass, def, 0); - if (!orig_fbody || !orig_fbody->nd_body) { - if (TYPE(klass) == T_MODULE) { - orig_fbody = search_method(rb_cObject, def, 0); - } - } - if (!orig_fbody || !orig_fbody->nd_body) { - rb_print_undef(klass, def, 0); - } - if (FL_TEST(klass, FL_SINGLETON)) { - singleton = rb_iv_get(klass, "__attached__"); - } - - orig_fbody->nd_cnt++; - - if (st_lookup(RCLASS_M_TBL(klass), name, &data)) { - node = (NODE *)data; - if (node) { - if (RTEST(ruby_verbose) && node->nd_cnt == 0 && node->nd_body) { - rb_warning("discarding old %s", rb_id2name(name)); - } - if (nd_type(node->nd_body->nd_body) == NODE_CFUNC) { - rb_vm_check_redefinition_opt_method(node); - } - } - } - - st_insert(RCLASS_M_TBL(klass), name, - (st_data_t) NEW_FBODY( - NEW_METHOD(orig_fbody->nd_body->nd_body, - orig_fbody->nd_body->nd_clss, - NOEX_WITH_SAFE(orig_fbody->nd_body->nd_noex)), def)); - - rb_clear_cache_by_id(name); - - if (!ruby_running) return; - - if (singleton) { - rb_funcall(singleton, singleton_added, 1, ID2SYM(name)); - } - else { - rb_funcall(klass, added, 1, ID2SYM(name)); - } -} - -/* - * call-seq: - * alias_method(new_name, old_name) => self - * - * Makes <i>new_name</i> a new copy of the method <i>old_name</i>. This can - * be used to retain access to methods that are overridden. - * - * module Mod - * alias_method :orig_exit, :exit - * def exit(code=0) - * puts "Exiting with code #{code}" - * orig_exit(code) - * end - * end - * include Mod - * exit(99) - * - * <em>produces:</em> - * - * Exiting with code 99 - */ - -static VALUE -rb_mod_alias_method(VALUE mod, VALUE newname, VALUE oldname) -{ - rb_alias(mod, rb_to_id(newname), rb_to_id(oldname)); - return mod; -} - -static void -Init_eval_method(void) -{ - rb_define_private_method(rb_cModule, "remove_method", rb_mod_remove_method, -1); - rb_define_private_method(rb_cModule, "undef_method", rb_mod_undef_method, -1); - rb_define_private_method(rb_cModule, "alias_method", rb_mod_alias_method, 2); -} |