diff options
Diffstat (limited to 'trunk/class.c')
| -rw-r--r-- | trunk/class.c | 959 |
1 files changed, 959 insertions, 0 deletions
diff --git a/trunk/class.c b/trunk/class.c new file mode 100644 index 0000000000..6f64d07612 --- /dev/null +++ b/trunk/class.c @@ -0,0 +1,959 @@ +/********************************************************************** + + class.c - + + $Author$ + created at: Tue Aug 10 15:05:44 JST 1993 + + Copyright (C) 1993-2007 Yukihiro Matsumoto + +**********************************************************************/ + +#include "ruby/ruby.h" +#include "ruby/signal.h" +#include "ruby/node.h" +#include "ruby/st.h" +#include "vm_core.h" +#include <ctype.h> + +extern st_table *rb_class_tbl; + +static VALUE +class_alloc(VALUE flags, VALUE klass) +{ + rb_classext_t *ext = ALLOC(rb_classext_t); + NEWOBJ(obj, struct RClass); + OBJSETUP(obj, klass, flags); + obj->ptr = ext; + RCLASS_IV_TBL(obj) = 0; + RCLASS_M_TBL(obj) = 0; + RCLASS_SUPER(obj) = 0; + RCLASS_IV_INDEX_TBL(obj) = 0; + return (VALUE)obj; +} + +VALUE +rb_class_boot(VALUE super) +{ + VALUE klass = class_alloc(T_CLASS, rb_cClass); + + RCLASS_SUPER(klass) = super; + RCLASS_M_TBL(klass) = st_init_numtable(); + + OBJ_INFECT(klass, super); + return (VALUE)klass; +} + +void +rb_check_inheritable(VALUE super) +{ + if (TYPE(super) != T_CLASS) { + rb_raise(rb_eTypeError, "superclass must be a Class (%s given)", + rb_obj_classname(super)); + } + if (RBASIC(super)->flags & FL_SINGLETON) { + rb_raise(rb_eTypeError, "can't make subclass of singleton class"); + } +} + +VALUE +rb_class_new(VALUE super) +{ + Check_Type(super, T_CLASS); + rb_check_inheritable(super); + if (super == rb_cClass) { + rb_raise(rb_eTypeError, "can't make subclass of Class"); + } + return rb_class_boot(super); +} + +struct clone_method_data { + st_table *tbl; + VALUE klass; +}; + +static int +clone_method(ID mid, NODE *body, struct clone_method_data *data) +{ + if (body == 0) { + st_insert(data->tbl, mid, 0); + } + else { + NODE *fbody = body->nd_body->nd_body; + + if (nd_type(fbody) == RUBY_VM_METHOD_NODE) { + fbody = NEW_NODE(RUBY_VM_METHOD_NODE, 0, + rb_iseq_clone((VALUE)fbody->nd_body, data->klass), + 0); + } + st_insert(data->tbl, mid, + (st_data_t) + NEW_FBODY( + NEW_METHOD(fbody, + data->klass, /* TODO */ + body->nd_body->nd_noex), + 0)); + } + return ST_CONTINUE; +} + +/* :nodoc: */ +VALUE +rb_mod_init_copy(VALUE clone, VALUE orig) +{ + rb_obj_init_copy(clone, orig); + if (!FL_TEST(CLASS_OF(clone), FL_SINGLETON)) { + RBASIC(clone)->klass = rb_singleton_class_clone(orig); + } + RCLASS_SUPER(clone) = RCLASS_SUPER(orig); + if (RCLASS_IV_TBL(orig)) { + ID id; + + RCLASS_IV_TBL(clone) = st_copy(RCLASS_IV_TBL(orig)); + CONST_ID(id, "__classpath__"); + st_delete(RCLASS_IV_TBL(clone), (st_data_t*)&id, 0); + CONST_ID(id, "__classid__"); + st_delete(RCLASS_IV_TBL(clone), (st_data_t*)&id, 0); + } + if (RCLASS_M_TBL(orig)) { + struct clone_method_data data; + data.tbl = RCLASS_M_TBL(clone) = st_init_numtable(); + data.klass = clone; + st_foreach(RCLASS_M_TBL(orig), clone_method, + (st_data_t)&data); + } + + return clone; +} + +/* :nodoc: */ +VALUE +rb_class_init_copy(VALUE clone, VALUE orig) +{ + if (RCLASS_SUPER(clone) != 0) { + rb_raise(rb_eTypeError, "already initialized class"); + } + if (FL_TEST(orig, FL_SINGLETON)) { + rb_raise(rb_eTypeError, "can't copy singleton class"); + } + return rb_mod_init_copy(clone, orig); +} + +VALUE +rb_singleton_class_clone(VALUE obj) +{ + VALUE klass = RBASIC(obj)->klass; + + if (!FL_TEST(klass, FL_SINGLETON)) + return klass; + else { + struct clone_method_data data; + /* copy singleton(unnamed) class */ + VALUE clone = class_alloc(RBASIC(klass)->flags, 0); + + if (BUILTIN_TYPE(obj) == T_CLASS) { + RBASIC(clone)->klass = (VALUE)clone; + } + else { + RBASIC(clone)->klass = rb_singleton_class_clone(klass); + } + + RCLASS_SUPER(clone) = RCLASS_SUPER(klass); + if (RCLASS_IV_TBL(klass)) { + RCLASS_IV_TBL(clone) = st_copy(RCLASS_IV_TBL(klass)); + } + RCLASS_M_TBL(clone) = st_init_numtable(); + data.tbl = RCLASS_M_TBL(clone); + data.klass = (VALUE)clone; + st_foreach(RCLASS_M_TBL(klass), clone_method, + (st_data_t)&data); + rb_singleton_class_attached(RBASIC(clone)->klass, (VALUE)clone); + FL_SET(clone, FL_SINGLETON); + return (VALUE)clone; + } +} + +void +rb_singleton_class_attached(VALUE klass, VALUE obj) +{ + if (FL_TEST(klass, FL_SINGLETON)) { + ID attached; + if (!RCLASS_IV_TBL(klass)) { + RCLASS_IV_TBL(klass) = st_init_numtable(); + } + CONST_ID(attached, "__attached__"); + st_insert(RCLASS_IV_TBL(klass), attached, obj); + } +} + +VALUE +rb_make_metaclass(VALUE obj, VALUE super) +{ + if (BUILTIN_TYPE(obj) == T_CLASS && FL_TEST(obj, FL_SINGLETON)) { + return RBASIC(obj)->klass = rb_cClass; + } + else { + VALUE metasuper; + VALUE klass = rb_class_boot(super); + + FL_SET(klass, FL_SINGLETON); + RBASIC(obj)->klass = klass; + rb_singleton_class_attached(klass, obj); + + metasuper = RBASIC(rb_class_real(super))->klass; + /* metaclass of a superclass may be NULL at boot time */ + if (metasuper) { + RBASIC(klass)->klass = metasuper; + } + return klass; + } +} + +VALUE +rb_define_class_id(ID id, VALUE super) +{ + VALUE klass; + + if (!super) super = rb_cObject; + klass = rb_class_new(super); + rb_make_metaclass(klass, RBASIC(super)->klass); + + return klass; +} + +VALUE +rb_class_inherited(VALUE super, VALUE klass) +{ + ID inherited; + if (!super) super = rb_cObject; + CONST_ID(inherited, "inherited"); + return rb_funcall(super, inherited, 1, klass); +} + +VALUE +rb_define_class(const char *name, VALUE super) +{ + VALUE klass; + ID id; + + id = rb_intern(name); + if (rb_const_defined(rb_cObject, id)) { + klass = rb_const_get(rb_cObject, id); + if (TYPE(klass) != T_CLASS) { + rb_raise(rb_eTypeError, "%s is not a class", name); + } + if (rb_class_real(RCLASS_SUPER(klass)) != super) { + rb_name_error(id, "%s is already defined", name); + } + return klass; + } + if (!super) { + rb_warn("no super class for `%s', Object assumed", name); + } + klass = rb_define_class_id(id, super); + st_add_direct(rb_class_tbl, id, klass); + rb_name_class(klass, id); + rb_const_set(rb_cObject, id, klass); + rb_class_inherited(super, klass); + + return klass; +} + +VALUE +rb_define_class_under(VALUE outer, const char *name, VALUE super) +{ + VALUE klass; + ID id; + + id = rb_intern(name); + if (rb_const_defined_at(outer, id)) { + klass = rb_const_get_at(outer, id); + if (TYPE(klass) != T_CLASS) { + rb_raise(rb_eTypeError, "%s is not a class", name); + } + if (rb_class_real(RCLASS_SUPER(klass)) != super) { + rb_name_error(id, "%s is already defined", name); + } + return klass; + } + if (!super) { + rb_warn("no super class for `%s::%s', Object assumed", + rb_class2name(outer), name); + } + klass = rb_define_class_id(id, super); + rb_set_class_path(klass, outer, name); + rb_const_set(outer, id, klass); + rb_class_inherited(super, klass); + + return klass; +} + +VALUE +rb_module_new(void) +{ + VALUE mdl = class_alloc(T_MODULE, rb_cModule); + + RCLASS_M_TBL(mdl) = st_init_numtable(); + + return (VALUE)mdl; +} + +VALUE +rb_define_module_id(ID id) +{ + VALUE mdl; + + mdl = rb_module_new(); + rb_name_class(mdl, id); + + return mdl; +} + +VALUE +rb_define_module(const char *name) +{ + VALUE module; + ID id; + + id = rb_intern(name); + if (rb_const_defined(rb_cObject, id)) { + module = rb_const_get(rb_cObject, id); + if (TYPE(module) == T_MODULE) + return module; + rb_raise(rb_eTypeError, "%s is not a module", rb_obj_classname(module)); + } + module = rb_define_module_id(id); + st_add_direct(rb_class_tbl, id, module); + rb_const_set(rb_cObject, id, module); + + return module; +} + +VALUE +rb_define_module_under(VALUE outer, const char *name) +{ + VALUE module; + ID id; + + id = rb_intern(name); + if (rb_const_defined_at(outer, id)) { + module = rb_const_get_at(outer, id); + if (TYPE(module) == T_MODULE) + return module; + rb_raise(rb_eTypeError, "%s::%s is not a module", + rb_class2name(outer), rb_obj_classname(module)); + } + module = rb_define_module_id(id); + rb_const_set(outer, id, module); + rb_set_class_path(module, outer, name); + + return module; +} + +static VALUE +include_class_new(VALUE module, VALUE super) +{ + VALUE klass = class_alloc(T_ICLASS, rb_cClass); + + if (BUILTIN_TYPE(module) == T_ICLASS) { + module = RBASIC(module)->klass; + } + if (!RCLASS_IV_TBL(module)) { + RCLASS_IV_TBL(module) = st_init_numtable(); + } + RCLASS_IV_TBL(klass) = RCLASS_IV_TBL(module); + RCLASS_M_TBL(klass) = RCLASS_M_TBL(module); + RCLASS_SUPER(klass) = super; + if (TYPE(module) == T_ICLASS) { + RBASIC(klass)->klass = RBASIC(module)->klass; + } + else { + RBASIC(klass)->klass = module; + } + OBJ_INFECT(klass, module); + OBJ_INFECT(klass, super); + + return (VALUE)klass; +} + +void +rb_include_module(VALUE klass, VALUE module) +{ + VALUE p, c; + int changed = 0; + + rb_frozen_class_p(klass); + if (!OBJ_UNTRUSTED(klass)) { + rb_secure(4); + } + + if (TYPE(module) != T_MODULE) { + Check_Type(module, T_MODULE); + } + + OBJ_INFECT(klass, module); + c = klass; + while (module) { + int superclass_seen = Qfalse; + + if (RCLASS_M_TBL(klass) == RCLASS_M_TBL(module)) + rb_raise(rb_eArgError, "cyclic include detected"); + /* ignore if the module included already in superclasses */ + for (p = RCLASS_SUPER(klass); p; p = RCLASS_SUPER(p)) { + switch (BUILTIN_TYPE(p)) { + case T_ICLASS: + if (RCLASS_M_TBL(p) == RCLASS_M_TBL(module)) { + if (!superclass_seen) { + c = p; /* move insertion point */ + } + goto skip; + } + break; + case T_CLASS: + superclass_seen = Qtrue; + break; + } + } + c = RCLASS_SUPER(c) = include_class_new(module, RCLASS_SUPER(c)); + changed = 1; + skip: + module = RCLASS_SUPER(module); + } + if (changed) rb_clear_cache(); +} + +/* + * call-seq: + * mod.included_modules -> array + * + * Returns the list of modules included in <i>mod</i>. + * + * module Mixin + * end + * + * module Outer + * include Mixin + * end + * + * Mixin.included_modules #=> [] + * Outer.included_modules #=> [Mixin] + */ + +VALUE +rb_mod_included_modules(VALUE mod) +{ + VALUE ary = rb_ary_new(); + VALUE p; + + for (p = RCLASS_SUPER(mod); p; p = RCLASS_SUPER(p)) { + if (BUILTIN_TYPE(p) == T_ICLASS) { + rb_ary_push(ary, RBASIC(p)->klass); + } + } + return ary; +} + +/* + * call-seq: + * mod.include?(module) => true or false + * + * Returns <code>true</code> if <i>module</i> is included in + * <i>mod</i> or one of <i>mod</i>'s ancestors. + * + * module A + * end + * class B + * include A + * end + * class C < B + * end + * B.include?(A) #=> true + * C.include?(A) #=> true + * A.include?(A) #=> false + */ + +VALUE +rb_mod_include_p(VALUE mod, VALUE mod2) +{ + VALUE p; + + Check_Type(mod2, T_MODULE); + for (p = RCLASS_SUPER(mod); p; p = RCLASS_SUPER(p)) { + if (BUILTIN_TYPE(p) == T_ICLASS) { + if (RBASIC(p)->klass == mod2) return Qtrue; + } + } + return Qfalse; +} + +/* + * call-seq: + * mod.ancestors -> array + * + * Returns a list of modules included in <i>mod</i> (including + * <i>mod</i> itself). + * + * module Mod + * include Math + * include Comparable + * end + * + * Mod.ancestors #=> [Mod, Comparable, Math] + * Math.ancestors #=> [Math] + */ + +VALUE +rb_mod_ancestors(VALUE mod) +{ + VALUE p, ary = rb_ary_new(); + + for (p = mod; p; p = RCLASS_SUPER(p)) { + if (FL_TEST(p, FL_SINGLETON)) + continue; + if (BUILTIN_TYPE(p) == T_ICLASS) { + rb_ary_push(ary, RBASIC(p)->klass); + } + else { + rb_ary_push(ary, p); + } + } + return ary; +} + +#define VISI(x) ((x)&NOEX_MASK) +#define VISI_CHECK(x,f) (VISI(x) == (f)) + +static int +ins_methods_push(ID name, long type, VALUE ary, long visi) +{ + if (type == -1) return ST_CONTINUE; + + switch (visi) { + case NOEX_PRIVATE: + case NOEX_PROTECTED: + case NOEX_PUBLIC: + visi = (type == visi); + break; + default: + visi = (type != NOEX_PRIVATE); + break; + } + if (visi) { + rb_ary_push(ary, ID2SYM(name)); + } + return ST_CONTINUE; +} + +static int +ins_methods_i(ID name, long type, VALUE ary) +{ + return ins_methods_push(name, type, ary, -1); /* everything but private */ +} + +static int +ins_methods_prot_i(ID name, long type, VALUE ary) +{ + return ins_methods_push(name, type, ary, NOEX_PROTECTED); +} + +static int +ins_methods_priv_i(ID name, long type, VALUE ary) +{ + return ins_methods_push(name, type, ary, NOEX_PRIVATE); +} + +static int +ins_methods_pub_i(ID name, long type, VALUE ary) +{ + return ins_methods_push(name, type, ary, NOEX_PUBLIC); +} + +static int +method_entry(ID key, NODE *body, st_table *list) +{ + long type; + + if (key == ID_ALLOCATOR) { + return ST_CONTINUE; + } + + if (!st_lookup(list, key, 0)) { + if (body ==0 || !body->nd_body->nd_body) { + type = -1; /* none */ + } + else { + type = VISI(body->nd_body->nd_noex); + } + st_add_direct(list, key, type); + } + return ST_CONTINUE; +} + +static VALUE +class_instance_method_list(int argc, VALUE *argv, VALUE mod, int (*func) (ID, long, VALUE)) +{ + VALUE ary; + int recur; + st_table *list; + + if (argc == 0) { + recur = Qtrue; + } + else { + VALUE r; + rb_scan_args(argc, argv, "01", &r); + recur = RTEST(r); + } + + list = st_init_numtable(); + for (; mod; mod = RCLASS_SUPER(mod)) { + st_foreach(RCLASS_M_TBL(mod), method_entry, (st_data_t)list); + if (BUILTIN_TYPE(mod) == T_ICLASS) continue; + if (FL_TEST(mod, FL_SINGLETON)) continue; + if (!recur) break; + } + ary = rb_ary_new(); + st_foreach(list, func, ary); + st_free_table(list); + + return ary; +} + +/* + * call-seq: + * mod.instance_methods(include_super=true) => array + * + * Returns an array containing the names of public instance methods in + * the receiver. For a module, these are the public methods; for a + * class, they are the instance (not singleton) methods. With no + * argument, or with an argument that is <code>false</code>, the + * instance methods in <i>mod</i> are returned, otherwise the methods + * in <i>mod</i> and <i>mod</i>'s superclasses are returned. + * + * module A + * def method1() end + * end + * class B + * def method2() end + * end + * class C < B + * def method3() end + * end + * + * A.instance_methods #=> [:method1] + * B.instance_methods(false) #=> [:method2] + * C.instance_methods(false) #=> [:method3] + * C.instance_methods(true).length #=> 43 + */ + +VALUE +rb_class_instance_methods(int argc, VALUE *argv, VALUE mod) +{ + return class_instance_method_list(argc, argv, mod, ins_methods_i); +} + +/* + * call-seq: + * mod.protected_instance_methods(include_super=true) => array + * + * Returns a list of the protected instance methods defined in + * <i>mod</i>. If the optional parameter is not <code>false</code>, the + * methods of any ancestors are included. + */ + +VALUE +rb_class_protected_instance_methods(int argc, VALUE *argv, VALUE mod) +{ + return class_instance_method_list(argc, argv, mod, ins_methods_prot_i); +} + +/* + * call-seq: + * mod.private_instance_methods(include_super=true) => array + * + * Returns a list of the private instance methods defined in + * <i>mod</i>. If the optional parameter is not <code>false</code>, the + * methods of any ancestors are included. + * + * module Mod + * def method1() end + * private :method1 + * def method2() end + * end + * Mod.instance_methods #=> [:method2] + * Mod.private_instance_methods #=> [:method1] + */ + +VALUE +rb_class_private_instance_methods(int argc, VALUE *argv, VALUE mod) +{ + return class_instance_method_list(argc, argv, mod, ins_methods_priv_i); +} + +/* + * call-seq: + * mod.public_instance_methods(include_super=true) => array + * + * Returns a list of the public instance methods defined in <i>mod</i>. + * If the optional parameter is not <code>false</code>, the methods of + * any ancestors are included. + */ + +VALUE +rb_class_public_instance_methods(int argc, VALUE *argv, VALUE mod) +{ + return class_instance_method_list(argc, argv, mod, ins_methods_pub_i); +} + +/* + * call-seq: + * obj.singleton_methods(all=true) => array + * + * Returns an array of the names of singleton methods for <i>obj</i>. + * If the optional <i>all</i> parameter is true, the list will include + * methods in modules included in <i>obj</i>. + * + * module Other + * def three() end + * end + * + * class Single + * def Single.four() end + * end + * + * a = Single.new + * + * def a.one() + * end + * + * class << a + * include Other + * def two() + * end + * end + * + * Single.singleton_methods #=> [:four] + * a.singleton_methods(false) #=> [:two, :one] + * a.singleton_methods #=> [:two, :one, :three] + */ + +VALUE +rb_obj_singleton_methods(int argc, VALUE *argv, VALUE obj) +{ + VALUE recur, ary, klass; + st_table *list; + + if (argc == 0) { + recur = Qtrue; + } + else { + rb_scan_args(argc, argv, "01", &recur); + } + klass = CLASS_OF(obj); + list = st_init_numtable(); + if (klass && FL_TEST(klass, FL_SINGLETON)) { + st_foreach(RCLASS_M_TBL(klass), method_entry, (st_data_t)list); + klass = RCLASS_SUPER(klass); + } + if (RTEST(recur)) { + while (klass && (FL_TEST(klass, FL_SINGLETON) || TYPE(klass) == T_ICLASS)) { + st_foreach(RCLASS_M_TBL(klass), method_entry, (st_data_t)list); + klass = RCLASS_SUPER(klass); + } + } + ary = rb_ary_new(); + st_foreach(list, ins_methods_i, ary); + st_free_table(list); + + return ary; +} + +void +rb_define_method_id(VALUE klass, ID name, VALUE (*func)(ANYARGS), int argc) +{ + rb_add_method(klass, name, NEW_CFUNC(func,argc), NOEX_PUBLIC); +} + +void +rb_define_method(VALUE klass, const char *name, VALUE (*func)(ANYARGS), int argc) +{ + rb_add_method(klass, rb_intern(name), NEW_CFUNC(func, argc), NOEX_PUBLIC); +} + +void +rb_define_protected_method(VALUE klass, const char *name, VALUE (*func)(ANYARGS), int argc) +{ + rb_add_method(klass, rb_intern(name), NEW_CFUNC(func, argc), NOEX_PROTECTED); +} + +void +rb_define_private_method(VALUE klass, const char *name, VALUE (*func)(ANYARGS), int argc) +{ + rb_add_method(klass, rb_intern(name), NEW_CFUNC(func, argc), NOEX_PRIVATE); +} + +void +rb_undef_method(VALUE klass, const char *name) +{ + rb_add_method(klass, rb_intern(name), 0, NOEX_UNDEF); +} + +#define SPECIAL_SINGLETON(x,c) do {\ + if (obj == (x)) {\ + return c;\ + }\ +} while (0) + +VALUE +rb_singleton_class(VALUE obj) +{ + VALUE klass; + + if (FIXNUM_P(obj) || SYMBOL_P(obj)) { + rb_raise(rb_eTypeError, "can't define singleton"); + } + if (rb_special_const_p(obj)) { + SPECIAL_SINGLETON(Qnil, rb_cNilClass); + SPECIAL_SINGLETON(Qfalse, rb_cFalseClass); + SPECIAL_SINGLETON(Qtrue, rb_cTrueClass); + rb_bug("unknown immediate %ld", obj); + } + + DEFER_INTS; + if (FL_TEST(RBASIC(obj)->klass, FL_SINGLETON) && + rb_iv_get(RBASIC(obj)->klass, "__attached__") == obj) { + klass = RBASIC(obj)->klass; + } + else { + klass = rb_make_metaclass(obj, RBASIC(obj)->klass); + } + if (OBJ_TAINTED(obj)) { + OBJ_TAINT(klass); + } + else { + FL_UNSET(klass, FL_TAINT); + } + if (OBJ_UNTRUSTED(obj)) { + OBJ_UNTRUST(klass); + } + else { + FL_UNSET(klass, FL_UNTRUSTED); + } + if (OBJ_FROZEN(obj)) OBJ_FREEZE(klass); + ALLOW_INTS; + + return klass; +} + +void +rb_define_singleton_method(VALUE obj, const char *name, VALUE (*func)(ANYARGS), int argc) +{ + rb_define_method(rb_singleton_class(obj), name, func, argc); +} + +void +rb_define_module_function(VALUE module, const char *name, VALUE (*func)(ANYARGS), int argc) +{ + rb_define_private_method(module, name, func, argc); + rb_define_singleton_method(module, name, func, argc); +} + +void +rb_define_global_function(const char *name, VALUE (*func)(ANYARGS), int argc) +{ + rb_define_module_function(rb_mKernel, name, func, argc); +} + +void +rb_define_alias(VALUE klass, const char *name1, const char *name2) +{ + rb_alias(klass, rb_intern(name1), rb_intern(name2)); +} + +void +rb_define_attr(VALUE klass, const char *name, int read, int write) +{ + rb_attr(klass, rb_intern(name), read, write, Qfalse); +} + +#include <stdarg.h> + +int +rb_scan_args(int argc, const VALUE *argv, const char *fmt, ...) +{ + int n, i = 0; + const char *p = fmt; + VALUE *var; + va_list vargs; + + va_start(vargs, fmt); + + if (*p == '*') goto rest_arg; + + if (ISDIGIT(*p)) { + n = *p - '0'; + if (n > argc) + rb_raise(rb_eArgError, "wrong number of arguments (%d for %d)", argc, n); + for (i=0; i<n; i++) { + var = va_arg(vargs, VALUE*); + if (var) *var = argv[i]; + } + p++; + } + else { + goto error; + } + + if (ISDIGIT(*p)) { + n = i + *p - '0'; + for (; i<n; i++) { + var = va_arg(vargs, VALUE*); + if (argc > i) { + if (var) *var = argv[i]; + } + else { + if (var) *var = Qnil; + } + } + p++; + } + + if(*p == '*') { + rest_arg: + var = va_arg(vargs, VALUE*); + if (argc > i) { + if (var) *var = rb_ary_new4(argc-i, argv+i); + i = argc; + } + else { + if (var) *var = rb_ary_new(); + } + p++; + } + + if (*p == '&') { + var = va_arg(vargs, VALUE*); + if (rb_block_given_p()) { + *var = rb_block_proc(); + } + else { + *var = Qnil; + } + p++; + } + va_end(vargs); + + if (*p != '\0') { + goto error; + } + + if (argc > i) { + rb_raise(rb_eArgError, "wrong number of arguments (%d for %d)", argc, i); + } + + return argc; + + error: + rb_fatal("bad scan arg format: %s", fmt); + return 0; +} |