diff options
Diffstat (limited to 'trunk/object.c')
| -rw-r--r-- | trunk/object.c | 2609 |
1 files changed, 0 insertions, 2609 deletions
diff --git a/trunk/object.c b/trunk/object.c deleted file mode 100644 index 3c95ef9515..0000000000 --- a/trunk/object.c +++ /dev/null @@ -1,2609 +0,0 @@ -/********************************************************************** - - object.c - - - $Author$ - created at: Thu Jul 15 12:01:24 JST 1993 - - Copyright (C) 1993-2007 Yukihiro Matsumoto - Copyright (C) 2000 Network Applied Communication Laboratory, Inc. - Copyright (C) 2000 Information-technology Promotion Agency, Japan - -**********************************************************************/ - -#include "ruby/ruby.h" -#include "ruby/st.h" -#include "ruby/util.h" -#include "debug.h" -#include <stdio.h> -#include <errno.h> -#include <ctype.h> -#include <math.h> -#include <float.h> - -VALUE rb_cBasicObject; -VALUE rb_mKernel; -VALUE rb_cObject; -VALUE rb_cModule; -VALUE rb_cClass; -VALUE rb_cData; - -VALUE rb_cNilClass; -VALUE rb_cTrueClass; -VALUE rb_cFalseClass; - -static ID id_eq, id_eql, id_match, id_inspect, id_init_copy; - -/* - * call-seq: - * obj === other => true or false - * - * Case Equality---For class <code>Object</code>, effectively the same - * as calling <code>#==</code>, but typically overridden by descendents - * to provide meaningful semantics in <code>case</code> statements. - */ - -VALUE -rb_equal(VALUE obj1, VALUE obj2) -{ - VALUE result; - - if (obj1 == obj2) return Qtrue; - result = rb_funcall(obj1, id_eq, 1, obj2); - if (RTEST(result)) return Qtrue; - return Qfalse; -} - -int -rb_eql(VALUE obj1, VALUE obj2) -{ - return RTEST(rb_funcall(obj1, id_eql, 1, obj2)); -} - -/* - * call-seq: - * obj == other => true or false - * obj.equal?(other) => true or false - * obj.eql?(other) => true or false - * - * Equality---At the <code>Object</code> level, <code>==</code> returns - * <code>true</code> only if <i>obj</i> and <i>other</i> are the - * same object. Typically, this method is overridden in descendent - * classes to provide class-specific meaning. - * - * Unlike <code>==</code>, the <code>equal?</code> method should never be - * overridden by subclasses: it is used to determine object identity - * (that is, <code>a.equal?(b)</code> iff <code>a</code> is the same - * object as <code>b</code>). - * - * The <code>eql?</code> method returns <code>true</code> if - * <i>obj</i> and <i>anObject</i> have the same value. Used by - * <code>Hash</code> to test members for equality. For objects of - * class <code>Object</code>, <code>eql?</code> is synonymous with - * <code>==</code>. Subclasses normally continue this tradition, but - * there are exceptions. <code>Numeric</code> types, for example, - * perform type conversion across <code>==</code>, but not across - * <code>eql?</code>, so: - * - * 1 == 1.0 #=> true - * 1.eql? 1.0 #=> false - */ - -VALUE -rb_obj_equal(VALUE obj1, VALUE obj2) -{ - if (obj1 == obj2) return Qtrue; - return Qfalse; -} - -/* - * call-seq: - * !obj => true or false - * - * Boolean negate. - */ - -VALUE -rb_obj_not(VALUE obj) -{ - return RTEST(obj) ? Qfalse : Qtrue; -} - -/* - * call-seq: - * obj != other => true or false - * - * Returns true if two objects are not-equal, otherwise false. - */ - -VALUE -rb_obj_not_equal(VALUE obj1, VALUE obj2) -{ - VALUE result = rb_funcall(obj1, id_eq, 1, obj2); - return RTEST(result) ? Qfalse : Qtrue; -} - -VALUE -rb_class_real(VALUE cl) -{ - if (cl == 0) - return 0; - while ((RBASIC(cl)->flags & FL_SINGLETON) || BUILTIN_TYPE(cl) == T_ICLASS) { - cl = RCLASS_SUPER(cl); - } - return cl; -} - -/* - * call-seq: - * obj.class => class - * - * Returns the class of <i>obj</i>, now preferred over - * <code>Object#type</code>, as an object's type in Ruby is only - * loosely tied to that object's class. This method must always be - * called with an explicit receiver, as <code>class</code> is also a - * reserved word in Ruby. - * - * 1.class #=> Fixnum - * self.class #=> Object - */ - -VALUE -rb_obj_class(VALUE obj) -{ - return rb_class_real(CLASS_OF(obj)); -} - -static void -init_copy(VALUE dest, VALUE obj) -{ - if (OBJ_FROZEN(dest)) { - rb_raise(rb_eTypeError, "[bug] frozen object (%s) allocated", rb_obj_classname(dest)); - } - RBASIC(dest)->flags &= ~(T_MASK|FL_EXIVAR); - RBASIC(dest)->flags |= RBASIC(obj)->flags & (T_MASK|FL_EXIVAR|FL_TAINT|FL_UNTRUSTED); - rb_copy_generic_ivar(dest, obj); - rb_gc_copy_finalizer(dest, obj); - switch (TYPE(obj)) { - case T_OBJECT: - if (!(RBASIC(dest)->flags & ROBJECT_EMBED) && ROBJECT_IVPTR(dest)) { - xfree(ROBJECT_IVPTR(dest)); - ROBJECT(dest)->as.heap.ivptr = 0; - ROBJECT(dest)->as.heap.numiv = 0; - ROBJECT(dest)->as.heap.iv_index_tbl = 0; - } - if (RBASIC(obj)->flags & ROBJECT_EMBED) { - MEMCPY(ROBJECT(dest)->as.ary, ROBJECT(obj)->as.ary, VALUE, ROBJECT_EMBED_LEN_MAX); - RBASIC(dest)->flags |= ROBJECT_EMBED; - } - else { - long len = ROBJECT(obj)->as.heap.numiv; - VALUE *ptr = ALLOC_N(VALUE, len); - MEMCPY(ptr, ROBJECT(obj)->as.heap.ivptr, VALUE, len); - ROBJECT(dest)->as.heap.ivptr = ptr; - ROBJECT(dest)->as.heap.numiv = len; - ROBJECT(dest)->as.heap.iv_index_tbl = ROBJECT(obj)->as.heap.iv_index_tbl; - RBASIC(dest)->flags &= ~ROBJECT_EMBED; - } - break; - case T_CLASS: - case T_MODULE: - if (RCLASS_IV_TBL(dest)) { - st_free_table(RCLASS_IV_TBL(dest)); - RCLASS_IV_TBL(dest) = 0; - } - if (RCLASS_IV_TBL(obj)) { - RCLASS_IV_TBL(dest) = st_copy(RCLASS_IV_TBL(obj)); - } - break; - } - rb_funcall(dest, id_init_copy, 1, obj); -} - -/* - * call-seq: - * obj.clone -> an_object - * - * Produces a shallow copy of <i>obj</i>---the instance variables of - * <i>obj</i> are copied, but not the objects they reference. Copies - * the frozen and tainted state of <i>obj</i>. See also the discussion - * under <code>Object#dup</code>. - * - * class Klass - * attr_accessor :str - * end - * s1 = Klass.new #=> #<Klass:0x401b3a38> - * s1.str = "Hello" #=> "Hello" - * s2 = s1.clone #=> #<Klass:0x401b3998 @str="Hello"> - * s2.str[1,4] = "i" #=> "i" - * s1.inspect #=> "#<Klass:0x401b3a38 @str=\"Hi\">" - * s2.inspect #=> "#<Klass:0x401b3998 @str=\"Hi\">" - * - * This method may have class-specific behavior. If so, that - * behavior will be documented under the #+initialize_copy+ method of - * the class. - */ - -VALUE -rb_obj_clone(VALUE obj) -{ - VALUE clone; - - if (rb_special_const_p(obj)) { - rb_raise(rb_eTypeError, "can't clone %s", rb_obj_classname(obj)); - } - clone = rb_obj_alloc(rb_obj_class(obj)); - RBASIC(clone)->klass = rb_singleton_class_clone(obj); - RBASIC(clone)->flags = (RBASIC(obj)->flags | FL_TEST(clone, FL_TAINT) | FL_TEST(clone, FL_UNTRUSTED)) & ~(FL_FREEZE|FL_FINALIZE); - init_copy(clone, obj); - RBASIC(clone)->flags |= RBASIC(obj)->flags & FL_FREEZE; - - return clone; -} - -/* - * call-seq: - * obj.dup -> an_object - * - * Produces a shallow copy of <i>obj</i>---the instance variables of - * <i>obj</i> are copied, but not the objects they reference. - * <code>dup</code> copies the tainted state of <i>obj</i>. See also - * the discussion under <code>Object#clone</code>. In general, - * <code>clone</code> and <code>dup</code> may have different semantics - * in descendent classes. While <code>clone</code> is used to duplicate - * an object, including its internal state, <code>dup</code> typically - * uses the class of the descendent object to create the new instance. - * - * This method may have class-specific behavior. If so, that - * behavior will be documented under the #+initialize_copy+ method of - * the class. - */ - -VALUE -rb_obj_dup(VALUE obj) -{ - VALUE dup; - - if (rb_special_const_p(obj)) { - rb_raise(rb_eTypeError, "can't dup %s", rb_obj_classname(obj)); - } - dup = rb_obj_alloc(rb_obj_class(obj)); - init_copy(dup, obj); - - return dup; -} - -/* :nodoc: */ -VALUE -rb_obj_init_copy(VALUE obj, VALUE orig) -{ - if (obj == orig) return obj; - rb_check_frozen(obj); - if (TYPE(obj) != TYPE(orig) || rb_obj_class(obj) != rb_obj_class(orig)) { - rb_raise(rb_eTypeError, "initialize_copy should take same class object"); - } - return obj; -} - -/* - * call-seq: - * obj.to_s => string - * - * Returns a string representing <i>obj</i>. The default - * <code>to_s</code> prints the object's class and an encoding of the - * object id. As a special case, the top-level object that is the - * initial execution context of Ruby programs returns ``main.'' - */ - -VALUE -rb_any_to_s(VALUE obj) -{ - const char *cname = rb_obj_classname(obj); - VALUE str; - - str = rb_sprintf("#<%s:%p>", cname, (void*)obj); - OBJ_INFECT(str, obj); - - return str; -} - -VALUE -rb_inspect(VALUE obj) -{ - return rb_obj_as_string(rb_funcall(obj, id_inspect, 0, 0)); -} - -static int -inspect_i(ID id, VALUE value, VALUE str) -{ - VALUE str2; - const char *ivname; - - /* need not to show internal data */ - if (CLASS_OF(value) == 0) return ST_CONTINUE; - if (!rb_is_instance_id(id)) return ST_CONTINUE; - if (RSTRING_PTR(str)[0] == '-') { /* first element */ - RSTRING_PTR(str)[0] = '#'; - rb_str_cat2(str, " "); - } - else { - rb_str_cat2(str, ", "); - } - ivname = rb_id2name(id); - rb_str_cat2(str, ivname); - rb_str_cat2(str, "="); - str2 = rb_inspect(value); - rb_str_append(str, str2); - OBJ_INFECT(str, str2); - - return ST_CONTINUE; -} - -static VALUE -inspect_obj(VALUE obj, VALUE str, int recur) -{ - if (recur) { - rb_str_cat2(str, " ..."); - } - else { - rb_ivar_foreach(obj, inspect_i, str); - } - rb_str_cat2(str, ">"); - RSTRING_PTR(str)[0] = '#'; - OBJ_INFECT(str, obj); - - return str; -} - -/* - * call-seq: - * obj.inspect => string - * - * Returns a string containing a human-readable representation of - * <i>obj</i>. If not overridden, uses the <code>to_s</code> method to - * generate the string. - * - * [ 1, 2, 3..4, 'five' ].inspect #=> "[1, 2, 3..4, \"five\"]" - * Time.new.inspect #=> "2008-03-08 19:43:39 +0900" - */ - - -static VALUE -rb_obj_inspect(VALUE obj) -{ - - if (TYPE(obj) == T_OBJECT) { - int has_ivar = 0; - VALUE *ptr = ROBJECT_IVPTR(obj); - long len = ROBJECT_NUMIV(obj); - long i; - - for (i = 0; i < len; i++) { - if (ptr[i] != Qundef) { - has_ivar = 1; - break; - } - } - - if (has_ivar) { - VALUE str; - const char *c = rb_obj_classname(obj); - - str = rb_sprintf("-<%s:%p", c, (void*)obj); - return rb_exec_recursive(inspect_obj, obj, str); - } - } - return rb_funcall(obj, rb_intern("to_s"), 0, 0); -} - - -/* - * call-seq: - * obj.instance_of?(class) => true or false - * - * Returns <code>true</code> if <i>obj</i> is an instance of the given - * class. See also <code>Object#kind_of?</code>. - */ - -VALUE -rb_obj_is_instance_of(VALUE obj, VALUE c) -{ - switch (TYPE(c)) { - case T_MODULE: - case T_CLASS: - case T_ICLASS: - break; - default: - rb_raise(rb_eTypeError, "class or module required"); - } - - if (rb_obj_class(obj) == c) return Qtrue; - return Qfalse; -} - - -/* - * call-seq: - * obj.is_a?(class) => true or false - * obj.kind_of?(class) => true or false - * - * Returns <code>true</code> if <i>class</i> is the class of - * <i>obj</i>, or if <i>class</i> is one of the superclasses of - * <i>obj</i> or modules included in <i>obj</i>. - * - * module M; end - * class A - * include M - * end - * class B < A; end - * class C < B; end - * b = B.new - * b.instance_of? A #=> false - * b.instance_of? B #=> true - * b.instance_of? C #=> false - * b.instance_of? M #=> false - * b.kind_of? A #=> true - * b.kind_of? B #=> true - * b.kind_of? C #=> false - * b.kind_of? M #=> true - */ - -VALUE -rb_obj_is_kind_of(VALUE obj, VALUE c) -{ - VALUE cl = CLASS_OF(obj); - - switch (TYPE(c)) { - case T_MODULE: - case T_CLASS: - case T_ICLASS: - break; - - default: - rb_raise(rb_eTypeError, "class or module required"); - } - - while (cl) { - if (cl == c || RCLASS_M_TBL(cl) == RCLASS_M_TBL(c)) - return Qtrue; - cl = RCLASS_SUPER(cl); - } - return Qfalse; -} - - -/* - * call-seq: - * obj.tap{|x|...} => obj - * - * Yields <code>x</code> to the block, and then returns <code>x</code>. - * The primary purpose of this method is to "tap into" a method chain, - * in order to perform operations on intermediate results within the chain. - * - * (1..10) .tap {|x| puts "original: #{x.inspect}"} - * .to_a .tap {|x| puts "array: #{x.inspect}"} - * .select {|x| x%2==0} .tap {|x| puts "evens: #{x.inspect}"} - * .map { |x| x*x } .tap {|x| puts "squares: #{x.inspect}"} - * - */ - -VALUE -rb_obj_tap(VALUE obj) -{ - rb_yield(obj); - return obj; -} - - -/* - * Document-method: inherited - * - * call-seq: - * inherited(subclass) - * - * Callback invoked whenever a subclass of the current class is created. - * - * Example: - * - * class Foo - * def self.inherited(subclass) - * puts "New subclass: #{subclass}" - * end - * end - * - * class Bar < Foo - * end - * - * class Baz < Bar - * end - * - * produces: - * - * New subclass: Bar - * New subclass: Baz - */ - -/* - * Document-method: singleton_method_added - * - * call-seq: - * singleton_method_added(symbol) - * - * Invoked as a callback whenever a singleton method is added to the - * receiver. - * - * module Chatty - * def Chatty.singleton_method_added(id) - * puts "Adding #{id.id2name}" - * end - * def self.one() end - * def two() end - * def Chatty.three() end - * end - * - * <em>produces:</em> - * - * Adding singleton_method_added - * Adding one - * Adding three - * - */ - -/* - * Document-method: singleton_method_removed - * - * call-seq: - * singleton_method_removed(symbol) - * - * Invoked as a callback whenever a singleton method is removed from - * the receiver. - * - * module Chatty - * def Chatty.singleton_method_removed(id) - * puts "Removing #{id.id2name}" - * end - * def self.one() end - * def two() end - * def Chatty.three() end - * class <<self - * remove_method :three - * remove_method :one - * end - * end - * - * <em>produces:</em> - * - * Removing three - * Removing one - */ - -/* - * Document-method: singleton_method_undefined - * - * call-seq: - * singleton_method_undefined(symbol) - * - * Invoked as a callback whenever a singleton method is undefined in - * the receiver. - * - * module Chatty - * def Chatty.singleton_method_undefined(id) - * puts "Undefining #{id.id2name}" - * end - * def Chatty.one() end - * class << self - * undef_method(:one) - * end - * end - * - * <em>produces:</em> - * - * Undefining one - */ - - -/* - * Document-method: included - * - * call-seq: - * included( othermod ) - * - * Callback invoked whenever the receiver is included in another - * module or class. This should be used in preference to - * <tt>Module.append_features</tt> if your code wants to perform some - * action when a module is included in another. - * - * module A - * def A.included(mod) - * puts "#{self} included in #{mod}" - * end - * end - * module Enumerable - * include A - * end - */ - - -/* - * Not documented - */ - -static VALUE -rb_obj_dummy(void) -{ - return Qnil; -} - -/* - * call-seq: - * obj.tainted? => true or false - * - * Returns <code>true</code> if the object is tainted. - */ - -VALUE -rb_obj_tainted(VALUE obj) -{ - if (OBJ_TAINTED(obj)) - return Qtrue; - return Qfalse; -} - -/* - * call-seq: - * obj.taint -> obj - * - * Marks <i>obj</i> as tainted---if the <code>$SAFE</code> level is - * set appropriately, many method calls which might alter the running - * programs environment will refuse to accept tainted strings. - */ - -VALUE -rb_obj_taint(VALUE obj) -{ - rb_secure(4); - if (!OBJ_TAINTED(obj)) { - if (OBJ_FROZEN(obj)) { - rb_error_frozen("object"); - } - OBJ_TAINT(obj); - } - return obj; -} - - -/* - * call-seq: - * obj.untaint => obj - * - * Removes the taint from <i>obj</i>. - */ - -VALUE -rb_obj_untaint(VALUE obj) -{ - rb_secure(3); - if (OBJ_TAINTED(obj)) { - if (OBJ_FROZEN(obj)) { - rb_error_frozen("object"); - } - FL_UNSET(obj, FL_TAINT); - } - return obj; -} - -/* - * call-seq: - * obj.untrusted? => true or false - * - * Returns <code>true</code> if the object is untrusted. - */ - -VALUE -rb_obj_untrusted(VALUE obj) -{ - if (OBJ_UNTRUSTED(obj)) - return Qtrue; - return Qfalse; -} - -/* - * call-seq: - * obj.untrust -> obj - * - * Marks <i>obj</i> as untrusted. - */ - -VALUE -rb_obj_untrust(VALUE obj) -{ - rb_secure(4); - if (!OBJ_UNTRUSTED(obj)) { - if (OBJ_FROZEN(obj)) { - rb_error_frozen("object"); - } - OBJ_UNTRUST(obj); - } - return obj; -} - - -/* - * call-seq: - * obj.trust => obj - * - * Removes the untrusted mark from <i>obj</i>. - */ - -VALUE -rb_obj_trust(VALUE obj) -{ - rb_secure(3); - if (OBJ_UNTRUSTED(obj)) { - if (OBJ_FROZEN(obj)) { - rb_error_frozen("object"); - } - FL_UNSET(obj, FL_UNTRUSTED); - } - return obj; -} - -void -rb_obj_infect(VALUE obj1, VALUE obj2) -{ - OBJ_INFECT(obj1, obj2); -} - -static st_table *immediate_frozen_tbl = 0; - -/* - * call-seq: - * obj.freeze => obj - * - * Prevents further modifications to <i>obj</i>. A - * <code>TypeError</code> will be raised if modification is attempted. - * There is no way to unfreeze a frozen object. See also - * <code>Object#frozen?</code>. - * - * a = [ "a", "b", "c" ] - * a.freeze - * a << "z" - * - * <em>produces:</em> - * - * prog.rb:3:in `<<': can't modify frozen array (TypeError) - * from prog.rb:3 - */ - -VALUE -rb_obj_freeze(VALUE obj) -{ - if (!OBJ_FROZEN(obj)) { - if (rb_safe_level() >= 4 && !OBJ_UNTRUSTED(obj)) { - rb_raise(rb_eSecurityError, "Insecure: can't freeze object"); - } - OBJ_FREEZE(obj); - if (SPECIAL_CONST_P(obj)) { - if (!immediate_frozen_tbl) { - immediate_frozen_tbl = st_init_numtable(); - } - st_insert(immediate_frozen_tbl, obj, (st_data_t)Qtrue); - } - } - return obj; -} - -/* - * call-seq: - * obj.frozen? => true or false - * - * Returns the freeze status of <i>obj</i>. - * - * a = [ "a", "b", "c" ] - * a.freeze #=> ["a", "b", "c"] - * a.frozen? #=> true - */ - -VALUE -rb_obj_frozen_p(VALUE obj) -{ - if (OBJ_FROZEN(obj)) return Qtrue; - if (SPECIAL_CONST_P(obj)) { - if (!immediate_frozen_tbl) return Qfalse; - if (st_lookup(immediate_frozen_tbl, obj, 0)) return Qtrue; - } - return Qfalse; -} - - -/* - * Document-class: NilClass - * - * The class of the singleton object <code>nil</code>. - */ - -/* - * call-seq: - * nil.to_i => 0 - * - * Always returns zero. - * - * nil.to_i #=> 0 - */ - - -static VALUE -nil_to_i(VALUE obj) -{ - return INT2FIX(0); -} - -/* - * call-seq: - * nil.to_f => 0.0 - * - * Always returns zero. - * - * nil.to_f #=> 0.0 - */ - -static VALUE -nil_to_f(VALUE obj) -{ - return DOUBLE2NUM(0.0); -} - -/* - * call-seq: - * nil.to_s => "" - * - * Always returns the empty string. - */ - -static VALUE -nil_to_s(VALUE obj) -{ - return rb_usascii_str_new(0, 0); -} - -/* - * Document-method: to_a - * - * call-seq: - * nil.to_a => [] - * - * Always returns an empty array. - * - * nil.to_a #=> [] - */ - -static VALUE -nil_to_a(VALUE obj) -{ - return rb_ary_new2(0); -} - -/* - * call-seq: - * nil.inspect => "nil" - * - * Always returns the string "nil". - */ - -static VALUE -nil_inspect(VALUE obj) -{ - return rb_usascii_str_new2("nil"); -} - -/*********************************************************************** - * Document-class: TrueClass - * - * The global value <code>true</code> is the only instance of class - * <code>TrueClass</code> and represents a logically true value in - * boolean expressions. The class provides operators allowing - * <code>true</code> to be used in logical expressions. - */ - - -/* - * call-seq: - * true.to_s => "true" - * - * The string representation of <code>true</code> is "true". - */ - -static VALUE -true_to_s(VALUE obj) -{ - return rb_usascii_str_new2("true"); -} - - -/* - * call-seq: - * true & obj => true or false - * - * And---Returns <code>false</code> if <i>obj</i> is - * <code>nil</code> or <code>false</code>, <code>true</code> otherwise. - */ - -static VALUE -true_and(VALUE obj, VALUE obj2) -{ - return RTEST(obj2)?Qtrue:Qfalse; -} - -/* - * call-seq: - * true | obj => true - * - * Or---Returns <code>true</code>. As <i>anObject</i> is an argument to - * a method call, it is always evaluated; there is no short-circuit - * evaluation in this case. - * - * true | puts("or") - * true || puts("logical or") - * - * <em>produces:</em> - * - * or - */ - -static VALUE -true_or(VALUE obj, VALUE obj2) -{ - return Qtrue; -} - - -/* - * call-seq: - * true ^ obj => !obj - * - * Exclusive Or---Returns <code>true</code> if <i>obj</i> is - * <code>nil</code> or <code>false</code>, <code>false</code> - * otherwise. - */ - -static VALUE -true_xor(VALUE obj, VALUE obj2) -{ - return RTEST(obj2)?Qfalse:Qtrue; -} - - -/* - * Document-class: FalseClass - * - * The global value <code>false</code> is the only instance of class - * <code>FalseClass</code> and represents a logically false value in - * boolean expressions. The class provides operators allowing - * <code>false</code> to participate correctly in logical expressions. - * - */ - -/* - * call-seq: - * false.to_s => "false" - * - * 'nuf said... - */ - -static VALUE -false_to_s(VALUE obj) -{ - return rb_usascii_str_new2("false"); -} - -/* - * call-seq: - * false & obj => false - * nil & obj => false - * - * And---Returns <code>false</code>. <i>obj</i> is always - * evaluated as it is the argument to a method call---there is no - * short-circuit evaluation in this case. - */ - -static VALUE -false_and(VALUE obj, VALUE obj2) -{ - return Qfalse; -} - - -/* - * call-seq: - * false | obj => true or false - * nil | obj => true or false - * - * Or---Returns <code>false</code> if <i>obj</i> is - * <code>nil</code> or <code>false</code>; <code>true</code> otherwise. - */ - -static VALUE -false_or(VALUE obj, VALUE obj2) -{ - return RTEST(obj2)?Qtrue:Qfalse; -} - - - -/* - * call-seq: - * false ^ obj => true or false - * nil ^ obj => true or false - * - * Exclusive Or---If <i>obj</i> is <code>nil</code> or - * <code>false</code>, returns <code>false</code>; otherwise, returns - * <code>true</code>. - * - */ - -static VALUE -false_xor(VALUE obj, VALUE obj2) -{ - return RTEST(obj2)?Qtrue:Qfalse; -} - -/* - * call_seq: - * nil.nil? => true - * - * Only the object <i>nil</i> responds <code>true</code> to <code>nil?</code>. - */ - -static VALUE -rb_true(VALUE obj) -{ - return Qtrue; -} - -/* - * call_seq: - * nil.nil? => true - * <anything_else>.nil? => false - * - * Only the object <i>nil</i> responds <code>true</code> to <code>nil?</code>. - */ - - -static VALUE -rb_false(VALUE obj) -{ - return Qfalse; -} - - -/* - * call-seq: - * obj =~ other => nil - * - * Pattern Match---Overridden by descendents (notably - * <code>Regexp</code> and <code>String</code>) to provide meaningful - * pattern-match semantics. - */ - -static VALUE -rb_obj_match(VALUE obj1, VALUE obj2) -{ - return Qnil; -} - -/* - * call-seq: - * obj !~ other => nil - * - * Returns true if two objects does not match, using <i>=~</i> method. - */ - -static VALUE -rb_obj_not_match(VALUE obj1, VALUE obj2) -{ - VALUE result = rb_funcall(obj1, id_match, 1, obj2); - return RTEST(result) ? Qfalse : Qtrue; -} - - -/*********************************************************************** - * - * Document-class: Module - * - * A <code>Module</code> is a collection of methods and constants. The - * methods in a module may be instance methods or module methods. - * Instance methods appear as methods in a class when the module is - * included, module methods do not. Conversely, module methods may be - * called without creating an encapsulating object, while instance - * methods may not. (See <code>Module#module_function</code>) - * - * In the descriptions that follow, the parameter <i>syml</i> refers - * to a symbol, which is either a quoted string or a - * <code>Symbol</code> (such as <code>:name</code>). - * - * module Mod - * include Math - * CONST = 1 - * def meth - * # ... - * end - * end - * Mod.class #=> Module - * Mod.constants #=> [:CONST, :PI, :E] - * Mod.instance_methods #=> [:meth] - * - */ - -/* - * call-seq: - * mod.to_s => string - * - * Return a string representing this module or class. For basic - * classes and modules, this is the name. For singletons, we - * show information on the thing we're attached to as well. - */ - -static VALUE -rb_mod_to_s(VALUE klass) -{ - if (FL_TEST(klass, FL_SINGLETON)) { - VALUE s = rb_usascii_str_new2("#<"); - VALUE v = rb_iv_get(klass, "__attached__"); - - rb_str_cat2(s, "Class:"); - switch (TYPE(v)) { - case T_CLASS: case T_MODULE: - rb_str_append(s, rb_inspect(v)); - break; - default: - rb_str_append(s, rb_any_to_s(v)); - break; - } - rb_str_cat2(s, ">"); - - return s; - } - return rb_str_dup(rb_class_name(klass)); -} - -/* - * call-seq: - * mod.freeze - * - * Prevents further modifications to <i>mod</i>. - */ - -static VALUE -rb_mod_freeze(VALUE mod) -{ - rb_class_name(mod); - return rb_obj_freeze(mod); -} - -/* - * call-seq: - * mod === obj => true or false - * - * Case Equality---Returns <code>true</code> if <i>anObject</i> is an - * instance of <i>mod</i> or one of <i>mod</i>'s descendents. Of - * limited use for modules, but can be used in <code>case</code> - * statements to classify objects by class. - */ - -static VALUE -rb_mod_eqq(VALUE mod, VALUE arg) -{ - return rb_obj_is_kind_of(arg, mod); -} - -/* - * call-seq: - * mod <= other => true, false, or nil - * - * Returns true if <i>mod</i> is a subclass of <i>other</i> or - * is the same as <i>other</i>. Returns - * <code>nil</code> if there's no relationship between the two. - * (Think of the relationship in terms of the class definition: - * "class A<B" implies "A<B"). - * - */ - -VALUE -rb_class_inherited_p(VALUE mod, VALUE arg) -{ - VALUE start = mod; - - if (mod == arg) return Qtrue; - switch (TYPE(arg)) { - case T_MODULE: - case T_CLASS: - break; - default: - rb_raise(rb_eTypeError, "compared with non class/module"); - } - while (mod) { - if (RCLASS_M_TBL(mod) == RCLASS_M_TBL(arg)) - return Qtrue; - mod = RCLASS_SUPER(mod); - } - /* not mod < arg; check if mod > arg */ - while (arg) { - if (RCLASS_M_TBL(arg) == RCLASS_M_TBL(start)) - return Qfalse; - arg = RCLASS_SUPER(arg); - } - return Qnil; -} - -/* - * call-seq: - * mod < other => true, false, or nil - * - * Returns true if <i>mod</i> is a subclass of <i>other</i>. Returns - * <code>nil</code> if there's no relationship between the two. - * (Think of the relationship in terms of the class definition: - * "class A<B" implies "A<B"). - * - */ - -static VALUE -rb_mod_lt(VALUE mod, VALUE arg) -{ - if (mod == arg) return Qfalse; - return rb_class_inherited_p(mod, arg); -} - - -/* - * call-seq: - * mod >= other => true, false, or nil - * - * Returns true if <i>mod</i> is an ancestor of <i>other</i>, or the - * two modules are the same. Returns - * <code>nil</code> if there's no relationship between the two. - * (Think of the relationship in terms of the class definition: - * "class A<B" implies "B>A"). - * - */ - -static VALUE -rb_mod_ge(VALUE mod, VALUE arg) -{ - switch (TYPE(arg)) { - case T_MODULE: - case T_CLASS: - break; - default: - rb_raise(rb_eTypeError, "compared with non class/module"); - } - - return rb_class_inherited_p(arg, mod); -} - -/* - * call-seq: - * mod > other => true, false, or nil - * - * Returns true if <i>mod</i> is an ancestor of <i>other</i>. Returns - * <code>nil</code> if there's no relationship between the two. - * (Think of the relationship in terms of the class definition: - * "class A<B" implies "B>A"). - * - */ - -static VALUE -rb_mod_gt(VALUE mod, VALUE arg) -{ - if (mod == arg) return Qfalse; - return rb_mod_ge(mod, arg); -} - -/* - * call-seq: - * mod <=> other_mod => -1, 0, +1, or nil - * - * Comparison---Returns -1 if <i>mod</i> includes <i>other_mod</i>, 0 if - * <i>mod</i> is the same as <i>other_mod</i>, and +1 if <i>mod</i> is - * included by <i>other_mod</i> or if <i>mod</i> has no relationship with - * <i>other_mod</i>. Returns <code>nil</code> if <i>other_mod</i> is - * not a module. - */ - -static VALUE -rb_mod_cmp(VALUE mod, VALUE arg) -{ - VALUE cmp; - - if (mod == arg) return INT2FIX(0); - switch (TYPE(arg)) { - case T_MODULE: - case T_CLASS: - break; - default: - return Qnil; - } - - cmp = rb_class_inherited_p(mod, arg); - if (NIL_P(cmp)) return Qnil; - if (cmp) { - return INT2FIX(-1); - } - return INT2FIX(1); -} - -static VALUE -rb_module_s_alloc(VALUE klass) -{ - VALUE mod = rb_module_new(); - - RBASIC(mod)->klass = klass; - return mod; -} - -static VALUE -rb_class_s_alloc(VALUE klass) -{ - return rb_class_boot(0); -} - -/* - * call-seq: - * Module.new => mod - * Module.new {|mod| block } => mod - * - * Creates a new anonymous module. If a block is given, it is passed - * the module object, and the block is evaluated in the context of this - * module using <code>module_eval</code>. - * - * Fred = Module.new do - * def meth1 - * "hello" - * end - * def meth2 - * "bye" - * end - * end - * a = "my string" - * a.extend(Fred) #=> "my string" - * a.meth1 #=> "hello" - * a.meth2 #=> "bye" - */ - -static VALUE -rb_mod_initialize(VALUE module) -{ - extern VALUE rb_mod_module_exec(int argc, VALUE *argv, VALUE mod); - - if (rb_block_given_p()) { - rb_mod_module_exec(1, &module, module); - } - return Qnil; -} - -/* - * call-seq: - * Class.new(super_class=Object) => a_class - * - * Creates a new anonymous (unnamed) class with the given superclass - * (or <code>Object</code> if no parameter is given). You can give a - * class a name by assigning the class object to a constant. - * - */ - -static VALUE -rb_class_initialize(int argc, VALUE *argv, VALUE klass) -{ - VALUE super; - - if (RCLASS_SUPER(klass) != 0) { - rb_raise(rb_eTypeError, "already initialized class"); - } - if (argc == 0) { - super = rb_cObject; - } - else { - rb_scan_args(argc, argv, "01", &super); - rb_check_inheritable(super); - } - RCLASS_SUPER(klass) = super; - rb_make_metaclass(klass, RBASIC(super)->klass); - rb_class_inherited(super, klass); - rb_mod_initialize(klass); - - return klass; -} - -/* - * call-seq: - * class.allocate() => obj - * - * Allocates space for a new object of <i>class</i>'s class and does not - * call initialize on the new instance. The returned object must be an - * instance of <i>class</i>. - * - * klass = Class.new do - * def initialize(*args) - * @initialized = true - * end - * - * def initialized? - * @initialized || false - * end - * end - * - * klass.allocate.initialized? #=> false - * - */ - -VALUE -rb_obj_alloc(VALUE klass) -{ - VALUE obj; - - if (RCLASS_SUPER(klass) == 0 && klass != rb_cBasicObject) { - rb_raise(rb_eTypeError, "can't instantiate uninitialized class"); - } - if (FL_TEST(klass, FL_SINGLETON)) { - rb_raise(rb_eTypeError, "can't create instance of singleton class"); - } - obj = rb_funcall(klass, ID_ALLOCATOR, 0, 0); - if (rb_obj_class(obj) != rb_class_real(klass)) { - rb_raise(rb_eTypeError, "wrong instance allocation"); - } - return obj; -} - -static VALUE -rb_class_allocate_instance(VALUE klass) -{ - NEWOBJ(obj, struct RObject); - OBJSETUP(obj, klass, T_OBJECT); - return (VALUE)obj; -} - -/* - * call-seq: - * class.new(args, ...) => obj - * - * Calls <code>allocate</code> to create a new object of - * <i>class</i>'s class, then invokes that object's - * <code>initialize</code> method, passing it <i>args</i>. - * This is the method that ends up getting called whenever - * an object is constructed using .new. - * - */ - -VALUE -rb_class_new_instance(int argc, VALUE *argv, VALUE klass) -{ - VALUE obj; - - obj = rb_obj_alloc(klass); - rb_obj_call_init(obj, argc, argv); - - return obj; -} - -/* - * call-seq: - * class.superclass -> a_super_class or nil - * - * Returns the superclass of <i>class</i>, or <code>nil</code>. - * - * File.superclass #=> IO - * IO.superclass #=> Object - * Object.superclass #=> BasicObject - * class Foo; end - * class Bar < Foo; end - * Bar.superclass #=> Foo - * - * returns nil when the given class hasn't a parent class: - * - * BasicObject.superclass #=> nil - * - */ - -static VALUE -rb_class_superclass(VALUE klass) -{ - VALUE super = RCLASS_SUPER(klass); - - if (!super) { - if (klass == rb_cBasicObject) return Qnil; - rb_raise(rb_eTypeError, "uninitialized class"); - } - while (TYPE(super) == T_ICLASS) { - super = RCLASS_SUPER(super); - } - if (!super) { - return Qnil; - } - return super; -} - -/* - * call-seq: - * attr_reader(symbol, ...) => nil - * attr(symbol, ...) => nil - * - * Creates instance variables and corresponding methods that return the - * value of each instance variable. Equivalent to calling - * ``<code>attr</code><i>:name</i>'' on each name in turn. - */ - -static VALUE -rb_mod_attr_reader(int argc, VALUE *argv, VALUE klass) -{ - int i; - - for (i=0; i<argc; i++) { - rb_attr(klass, rb_to_id(argv[i]), Qtrue, Qfalse, Qtrue); - } - return Qnil; -} - -VALUE -rb_mod_attr(int argc, VALUE *argv, VALUE klass) -{ - if (argc == 2 && (argv[1] == Qtrue || argv[1] == Qfalse)) { - rb_warning("optional boolean argument is obsoleted"); - rb_attr(klass, rb_to_id(argv[0]), 1, RTEST(argv[1]), Qtrue); - return Qnil; - } - return rb_mod_attr_reader(argc, argv, klass); -} - -/* - * call-seq: - * attr_writer(symbol, ...) => nil - * - * Creates an accessor method to allow assignment to the attribute - * <i>aSymbol</i><code>.id2name</code>. - */ - -static VALUE -rb_mod_attr_writer(int argc, VALUE *argv, VALUE klass) -{ - int i; - - for (i=0; i<argc; i++) { - rb_attr(klass, rb_to_id(argv[i]), Qfalse, Qtrue, Qtrue); - } - return Qnil; -} - -/* - * call-seq: - * attr_accessor(symbol, ...) => nil - * - * Defines a named attribute for this module, where the name is - * <i>symbol.</i><code>id2name</code>, creating an instance variable - * (<code>@name</code>) and a corresponding access method to read it. - * Also creates a method called <code>name=</code> to set the attribute. - * - * module Mod - * attr_accessor(:one, :two) - * end - * Mod.instance_methods.sort #=> [:one, :one=, :two, :two=] - */ - -static VALUE -rb_mod_attr_accessor(int argc, VALUE *argv, VALUE klass) -{ - int i; - - for (i=0; i<argc; i++) { - rb_attr(klass, rb_to_id(argv[i]), Qtrue, Qtrue, Qtrue); - } - return Qnil; -} - -/* - * call-seq: - * mod.const_get(sym, inherit=true) => obj - * - * Returns the value of the named constant in <i>mod</i>. - * - * Math.const_get(:PI) #=> 3.14159265358979 - * - * If the constant is not defined or is defined by the ancestors and - * +inherit+ is false, +NameError+ will be raised. - */ - -static VALUE -rb_mod_const_get(int argc, VALUE *argv, VALUE mod) -{ - VALUE name, recur; - ID id; - - if (argc == 1) { - name = argv[0]; - recur = Qtrue; - } - else { - rb_scan_args(argc, argv, "11", &name, &recur); - } - id = rb_to_id(name); - if (!rb_is_const_id(id)) { - rb_name_error(id, "wrong constant name %s", rb_id2name(id)); - } - return RTEST(recur) ? rb_const_get(mod, id) : rb_const_get_at(mod, id); -} - -/* - * call-seq: - * mod.const_set(sym, obj) => obj - * - * Sets the named constant to the given object, returning that object. - * Creates a new constant if no constant with the given name previously - * existed. - * - * Math.const_set("HIGH_SCHOOL_PI", 22.0/7.0) #=> 3.14285714285714 - * Math::HIGH_SCHOOL_PI - Math::PI #=> 0.00126448926734968 - */ - -static VALUE -rb_mod_const_set(VALUE mod, VALUE name, VALUE value) -{ - ID id = rb_to_id(name); - - if (!rb_is_const_id(id)) { - rb_name_error(id, "wrong constant name %s", rb_id2name(id)); - } - rb_const_set(mod, id, value); - return value; -} - -/* - * call-seq: - * mod.const_defined?(sym, inherit=true) => true or false - * - * Returns <code>true</code> if a constant with the given name is - * defined by <i>mod</i>, or its ancestors if +inherit+ is not false. - * - * Math.const_defined? "PI" #=> true - * IO.const_defined? "SYNC" #=> true - * IO.const_defined? "SYNC", false #=> false - */ - -static VALUE -rb_mod_const_defined(int argc, VALUE *argv, VALUE mod) -{ - VALUE name, recur; - ID id; - - if (argc == 1) { - name = argv[0]; - recur = Qtrue; - } - else { - rb_scan_args(argc, argv, "11", &name, &recur); - } - id = rb_to_id(name); - if (!rb_is_const_id(id)) { - rb_name_error(id, "wrong constant name %s", rb_id2name(id)); - } - return RTEST(recur) ? rb_const_defined(mod, id) : rb_const_defined_at(mod, id); -} - -/* - * call-seq: - * obj.methods => array - * - * Returns a list of the names of methods publicly accessible in - * <i>obj</i>. This will include all the methods accessible in - * <i>obj</i>'s ancestors. - * - * class Klass - * def kMethod() - * end - * end - * k = Klass.new - * k.methods[0..9] #=> ["kMethod", "freeze", "nil?", "is_a?", - * # "class", "instance_variable_set", - * # "methods", "extend", "__send__", "instance_eval"] - * k.methods.length #=> 42 - */ - -static VALUE -rb_obj_methods(int argc, VALUE *argv, VALUE obj) -{ - retry: - if (argc == 0) { - VALUE args[1]; - - args[0] = Qtrue; - return rb_class_instance_methods(1, args, CLASS_OF(obj)); - } - else { - VALUE recur; - - rb_scan_args(argc, argv, "1", &recur); - if (RTEST(recur)) { - argc = 0; - goto retry; - } - return rb_obj_singleton_methods(argc, argv, obj); - } -} - -/* - * call-seq: - * obj.protected_methods(all=true) => array - * - * Returns the list of protected methods accessible to <i>obj</i>. If - * the <i>all</i> parameter is set to <code>false</code>, only those methods - * in the receiver will be listed. - */ - -static VALUE -rb_obj_protected_methods(int argc, VALUE *argv, VALUE obj) -{ - if (argc == 0) { /* hack to stop warning */ - VALUE args[1]; - - args[0] = Qtrue; - return rb_class_protected_instance_methods(1, args, CLASS_OF(obj)); - } - return rb_class_protected_instance_methods(argc, argv, CLASS_OF(obj)); -} - -/* - * call-seq: - * obj.private_methods(all=true) => array - * - * Returns the list of private methods accessible to <i>obj</i>. If - * the <i>all</i> parameter is set to <code>false</code>, only those methods - * in the receiver will be listed. - */ - -static VALUE -rb_obj_private_methods(int argc, VALUE *argv, VALUE obj) -{ - if (argc == 0) { /* hack to stop warning */ - VALUE args[1]; - - args[0] = Qtrue; - return rb_class_private_instance_methods(1, args, CLASS_OF(obj)); - } - return rb_class_private_instance_methods(argc, argv, CLASS_OF(obj)); -} - -/* - * call-seq: - * obj.public_methods(all=true) => array - * - * Returns the list of public methods accessible to <i>obj</i>. If - * the <i>all</i> parameter is set to <code>false</code>, only those methods - * in the receiver will be listed. - */ - -static VALUE -rb_obj_public_methods(int argc, VALUE *argv, VALUE obj) -{ - if (argc == 0) { /* hack to stop warning */ - VALUE args[1]; - - args[0] = Qtrue; - return rb_class_public_instance_methods(1, args, CLASS_OF(obj)); - } - return rb_class_public_instance_methods(argc, argv, CLASS_OF(obj)); -} - -/* - * call-seq: - * obj.instance_variable_get(symbol) => obj - * - * Returns the value of the given instance variable, or nil if the - * instance variable is not set. The <code>@</code> part of the - * variable name should be included for regular instance - * variables. Throws a <code>NameError</code> exception if the - * supplied symbol is not valid as an instance variable name. - * - * class Fred - * def initialize(p1, p2) - * @a, @b = p1, p2 - * end - * end - * fred = Fred.new('cat', 99) - * fred.instance_variable_get(:@a) #=> "cat" - * fred.instance_variable_get("@b") #=> 99 - */ - -static VALUE -rb_obj_ivar_get(VALUE obj, VALUE iv) -{ - ID id = rb_to_id(iv); - - if (!rb_is_instance_id(id)) { - rb_name_error(id, "`%s' is not allowed as an instance variable name", rb_id2name(id)); - } - return rb_ivar_get(obj, id); -} - -/* - * call-seq: - * obj.instance_variable_set(symbol, obj) => obj - * - * Sets the instance variable names by <i>symbol</i> to - * <i>object</i>, thereby frustrating the efforts of the class's - * author to attempt to provide proper encapsulation. The variable - * did not have to exist prior to this call. - * - * class Fred - * def initialize(p1, p2) - * @a, @b = p1, p2 - * end - * end - * fred = Fred.new('cat', 99) - * fred.instance_variable_set(:@a, 'dog') #=> "dog" - * fred.instance_variable_set(:@c, 'cat') #=> "cat" - * fred.inspect #=> "#<Fred:0x401b3da8 @a=\"dog\", @b=99, @c=\"cat\">" - */ - -static VALUE -rb_obj_ivar_set(VALUE obj, VALUE iv, VALUE val) -{ - ID id = rb_to_id(iv); - - if (!rb_is_instance_id(id)) { - rb_name_error(id, "`%s' is not allowed as an instance variable name", rb_id2name(id)); - } - return rb_ivar_set(obj, id, val); -} - -/* - * call-seq: - * obj.instance_variable_defined?(symbol) => true or false - * - * Returns <code>true</code> if the given instance variable is - * defined in <i>obj</i>. - * - * class Fred - * def initialize(p1, p2) - * @a, @b = p1, p2 - * end - * end - * fred = Fred.new('cat', 99) - * fred.instance_variable_defined?(:@a) #=> true - * fred.instance_variable_defined?("@b") #=> true - * fred.instance_variable_defined?("@c") #=> false - */ - -static VALUE -rb_obj_ivar_defined(VALUE obj, VALUE iv) -{ - ID id = rb_to_id(iv); - - if (!rb_is_instance_id(id)) { - rb_name_error(id, "`%s' is not allowed as an instance variable name", rb_id2name(id)); - } - return rb_ivar_defined(obj, id); -} - -/* - * call-seq: - * mod.class_variable_get(symbol) => obj - * - * Returns the value of the given class variable (or throws a - * <code>NameError</code> exception). The <code>@@</code> part of the - * variable name should be included for regular class variables - * - * class Fred - * @@foo = 99 - * end - * Fred.class_variable_get(:@@foo) #=> 99 - */ - -static VALUE -rb_mod_cvar_get(VALUE obj, VALUE iv) -{ - ID id = rb_to_id(iv); - - if (!rb_is_class_id(id)) { - rb_name_error(id, "`%s' is not allowed as a class variable name", rb_id2name(id)); - } - return rb_cvar_get(obj, id); -} - -/* - * call-seq: - * obj.class_variable_set(symbol, obj) => obj - * - * Sets the class variable names by <i>symbol</i> to - * <i>object</i>. - * - * class Fred - * @@foo = 99 - * def foo - * @@foo - * end - * end - * Fred.class_variable_set(:@@foo, 101) #=> 101 - * Fred.new.foo #=> 101 - */ - -static VALUE -rb_mod_cvar_set(VALUE obj, VALUE iv, VALUE val) -{ - ID id = rb_to_id(iv); - - if (!rb_is_class_id(id)) { - rb_name_error(id, "`%s' is not allowed as a class variable name", rb_id2name(id)); - } - rb_cvar_set(obj, id, val); - return val; -} - -/* - * call-seq: - * obj.class_variable_defined?(symbol) => true or false - * - * Returns <code>true</code> if the given class variable is defined - * in <i>obj</i>. - * - * class Fred - * @@foo = 99 - * end - * Fred.class_variable_defined?(:@@foo) #=> true - * Fred.class_variable_defined?(:@@bar) #=> false - */ - -static VALUE -rb_mod_cvar_defined(VALUE obj, VALUE iv) -{ - ID id = rb_to_id(iv); - - if (!rb_is_class_id(id)) { - rb_name_error(id, "`%s' is not allowed as a class variable name", rb_id2name(id)); - } - return rb_cvar_defined(obj, id); -} - -static VALUE -convert_type(VALUE val, const char *tname, const char *method, int raise) -{ - ID m; - - m = rb_intern(method); - if (!rb_respond_to(val, m)) { - if (raise) { - rb_raise(rb_eTypeError, "can't convert %s into %s", - NIL_P(val) ? "nil" : - val == Qtrue ? "true" : - val == Qfalse ? "false" : - rb_obj_classname(val), - tname); - } - else { - return Qnil; - } - } - return rb_funcall(val, m, 0); -} - -VALUE -rb_convert_type(VALUE val, int type, const char *tname, const char *method) -{ - VALUE v; - - if (TYPE(val) == type) return val; - v = convert_type(val, tname, method, Qtrue); - if (TYPE(v) != type) { - const char *cname = rb_obj_classname(val); - rb_raise(rb_eTypeError, "can't convert %s to %s (%s#%s gives %s)", - cname, tname, cname, method, rb_obj_classname(v)); - } - return v; -} - -VALUE -rb_check_convert_type(VALUE val, int type, const char *tname, const char *method) -{ - VALUE v; - - /* always convert T_DATA */ - if (TYPE(val) == type && type != T_DATA) return val; - v = convert_type(val, tname, method, Qfalse); - if (NIL_P(v)) return Qnil; - if (TYPE(v) != type) { - const char *cname = rb_obj_classname(val); - rb_raise(rb_eTypeError, "can't convert %s to %s (%s#%s gives %s)", - cname, tname, cname, method, rb_obj_classname(v)); - } - return v; -} - - -static VALUE -rb_to_integer(VALUE val, const char *method) -{ - VALUE v; - - if (FIXNUM_P(val)) return val; - v = convert_type(val, "Integer", method, Qtrue); - if (!rb_obj_is_kind_of(v, rb_cInteger)) { - const char *cname = rb_obj_classname(val); - rb_raise(rb_eTypeError, "can't convert %s to Integer (%s#%s gives %s)", - cname, cname, method, rb_obj_classname(v)); - } - return v; -} - -VALUE -rb_check_to_integer(VALUE val, const char *method) -{ - VALUE v; - - if (FIXNUM_P(val)) return val; - v = convert_type(val, "Integer", method, Qfalse); - if (!rb_obj_is_kind_of(v, rb_cInteger)) { - return Qnil; - } - return v; -} - -VALUE -rb_to_int(VALUE val) -{ - return rb_to_integer(val, "to_int"); -} - -VALUE -rb_Integer(VALUE val) -{ - VALUE tmp; - - switch (TYPE(val)) { - case T_FLOAT: - if (RFLOAT_VALUE(val) <= (double)FIXNUM_MAX - && RFLOAT_VALUE(val) >= (double)FIXNUM_MIN) { - break; - } - return rb_dbl2big(RFLOAT_VALUE(val)); - - case T_FIXNUM: - case T_BIGNUM: - return val; - - case T_STRING: - return rb_str_to_inum(val, 0, Qtrue); - - case T_NIL: - rb_raise(rb_eTypeError, "can't convert nil into Integer"); - break; - - default: - break; - } - tmp = convert_type(val, "Integer", "to_int", Qfalse); - if (NIL_P(tmp)) { - return rb_to_integer(val, "to_i"); - } - return tmp; -} - -/* - * call-seq: - * Integer(arg) => integer - * - * Converts <i>arg</i> to a <code>Fixnum</code> or <code>Bignum</code>. - * Numeric types are converted directly (with floating point numbers - * being truncated). If <i>arg</i> is a <code>String</code>, leading - * radix indicators (<code>0</code>, <code>0b</code>, and - * <code>0x</code>) are honored. Others are converted using - * <code>to_int</code> and <code>to_i</code>. This behavior is - * different from that of <code>String#to_i</code>. - * - * Integer(123.999) #=> 123 - * Integer("0x1a") #=> 26 - * Integer(Time.new) #=> 1204973019 - */ - -static VALUE -rb_f_integer(VALUE obj, VALUE arg) -{ - return rb_Integer(arg); -} - -double -rb_cstr_to_dbl(const char *p, int badcheck) -{ - const char *q; - char *end; - double d; - const char *ellipsis = ""; - int w; -#define OutOfRange() (((w = end - p) > 20) ? (w = 20, ellipsis = "...") : (ellipsis = "")) - - if (!p) return 0.0; - q = p; - while (ISSPACE(*p)) p++; - d = strtod(p, &end); - if (errno == ERANGE) { - OutOfRange(); - rb_warning("Float %.*s%s out of range", w, p, ellipsis); - errno = 0; - } - if (p == end) { - if (badcheck) { - bad: - rb_invalid_str(q, "Float()"); - } - return d; - } - if (*end) { - char buf[DBL_DIG * 4 + 10]; - char *n = buf; - char *e = buf + sizeof(buf) - 1; - char prev = 0; - - while (p < end && n < e) prev = *n++ = *p++; - while (*p) { - if (*p == '_') { - /* remove underscores between digits */ - if (badcheck) { - if (n == buf || !ISDIGIT(prev)) goto bad; - ++p; - if (!ISDIGIT(*p)) goto bad; - } - else { - while (*++p == '_'); - continue; - } - } - prev = *p++; - if (n < e) *n++ = prev; - } - *n = '\0'; - p = buf; - d = strtod(p, &end); - if (errno == ERANGE) { - OutOfRange(); - rb_warning("Float %.*s%s out of range", w, p, ellipsis); - errno = 0; - } - if (badcheck) { - if (!end || p == end) goto bad; - while (*end && ISSPACE(*end)) end++; - if (*end) goto bad; - } - } - if (errno == ERANGE) { - errno = 0; - OutOfRange(); - rb_raise(rb_eArgError, "Float %.*s%s out of range", w, q, ellipsis); - } - return d; -} - -double -rb_str_to_dbl(VALUE str, int badcheck) -{ - char *s; - long len; - - StringValue(str); - s = RSTRING_PTR(str); - len = RSTRING_LEN(str); - if (s) { - if (s[len]) { /* no sentinel somehow */ - char *p = ALLOCA_N(char, len+1); - - MEMCPY(p, s, char, len); - p[len] = '\0'; - s = p; - } - if (badcheck && len != strlen(s)) { - rb_raise(rb_eArgError, "string for Float contains null byte"); - } - } - return rb_cstr_to_dbl(s, badcheck); -} - -VALUE -rb_Float(VALUE val) -{ - switch (TYPE(val)) { - case T_FIXNUM: - return DOUBLE2NUM((double)FIX2LONG(val)); - - case T_FLOAT: - return val; - - case T_BIGNUM: - return DOUBLE2NUM(rb_big2dbl(val)); - - case T_STRING: - return DOUBLE2NUM(rb_str_to_dbl(val, Qtrue)); - - case T_NIL: - rb_raise(rb_eTypeError, "can't convert nil into Float"); - break; - - default: - return rb_convert_type(val, T_FLOAT, "Float", "to_f"); - } -} - -/* - * call-seq: - * Float(arg) => float - * - * Returns <i>arg</i> converted to a float. Numeric types are converted - * directly, the rest are converted using <i>arg</i>.to_f. As of Ruby - * 1.8, converting <code>nil</code> generates a <code>TypeError</code>. - * - * Float(1) #=> 1.0 - * Float("123.456") #=> 123.456 - */ - -static VALUE -rb_f_float(VALUE obj, VALUE arg) -{ - return rb_Float(arg); -} - -double -rb_num2dbl(VALUE val) -{ - switch (TYPE(val)) { - case T_FLOAT: - return RFLOAT_VALUE(val); - - case T_STRING: - rb_raise(rb_eTypeError, "no implicit conversion to float from string"); - break; - - case T_NIL: - rb_raise(rb_eTypeError, "no implicit conversion to float from nil"); - break; - - default: - break; - } - - return RFLOAT_VALUE(rb_Float(val)); -} - -char* -rb_str2cstr(VALUE str, long *len) -{ - StringValue(str); - if (len) *len = RSTRING_LEN(str); - else if (RTEST(ruby_verbose) && RSTRING_LEN(str) != strlen(RSTRING_PTR(str))) { - rb_warn("string contains \\0 character"); - } - return RSTRING_PTR(str); -} - -VALUE -rb_String(VALUE val) -{ - return rb_convert_type(val, T_STRING, "String", "to_s"); -} - - -/* - * call-seq: - * String(arg) => string - * - * Converts <i>arg</i> to a <code>String</code> by calling its - * <code>to_s</code> method. - * - * String(self) #=> "main" - * String(self.class) #=> "Object" - * String(123456) #=> "123456" - */ - -static VALUE -rb_f_string(VALUE obj, VALUE arg) -{ - return rb_String(arg); -} - -VALUE -rb_Array(VALUE val) -{ - VALUE tmp = rb_check_array_type(val); - - if (NIL_P(tmp)) { - tmp = rb_check_convert_type(val, T_ARRAY, "Array", "to_a"); - if (NIL_P(tmp)) { - return rb_ary_new3(1, val); - } - } - return tmp; -} - -/* - * call-seq: - * Array(arg) => array - * - * Returns <i>arg</i> as an <code>Array</code>. First tries to call - * <i>arg</i><code>.to_ary</code>, then <i>arg</i><code>.to_a</code>. - * - * Array(1..5) #=> [1, 2, 3, 4, 5] - */ - -static VALUE -rb_f_array(VALUE obj, VALUE arg) -{ - return rb_Array(arg); -} - -static VALUE -boot_defclass(const char *name, VALUE super) -{ - extern st_table *rb_class_tbl; - VALUE obj = rb_class_boot(super); - ID id = rb_intern(name); - - rb_name_class(obj, id); - st_add_direct(rb_class_tbl, id, obj); - rb_const_set((rb_cObject ? rb_cObject : obj), id, obj); - return obj; -} - -/* - * Document-class: Class - * - * Classes in Ruby are first-class objects---each is an instance of - * class <code>Class</code>. - * - * When a new class is created (typically using <code>class Name ... - * end</code>), an object of type <code>Class</code> is created and - * assigned to a global constant (<code>Name</code> in this case). When - * <code>Name.new</code> is called to create a new object, the - * <code>new</code> method in <code>Class</code> is run by default. - * This can be demonstrated by overriding <code>new</code> in - * <code>Class</code>: - * - * class Class - * alias oldNew new - * def new(*args) - * print "Creating a new ", self.name, "\n" - * oldNew(*args) - * end - * end - * - * - * class Name - * end - * - * - * n = Name.new - * - * <em>produces:</em> - * - * Creating a new Name - * - * Classes, modules, and objects are interrelated. In the diagram - * that follows, the vertical arrows represent inheritance, and the - * parentheses meta-classes. All metaclasses are instances - * of the class `Class'. - * - * +-----------------+ - * | | - * BasicObject-->(BasicObject) | - * ^ ^ | - * | | | - * Object---->(Object) | - * ^ ^ ^ ^ | - * | | | | | - * | | +-----+ +---------+ | - * | | | | | - * | +-----------+ | | - * | | | | | - * +------+ | Module--->(Module) | - * | | ^ ^ | - * OtherClass-->(OtherClass) | | | - * | | | - * Class---->(Class) | - * ^ | - * | | - * +----------------+ - */ - - -/* - * <code>BasicObject</code> is the parent class of all classes in Ruby. - * It's an explicit blank class. <code>Object</code>, the root of Ruby's - * class hierarchy is a direct subclass of <code>BasicObject</code>. Its - * methods are therefore available to all objects unless explicitly - * overridden. - * - * <code>Object</code> mixes in the <code>Kernel</code> module, making - * the built-in kernel functions globally accessible. Although the - * instance methods of <code>Object</code> are defined by the - * <code>Kernel</code> module, we have chosen to document them here for - * clarity. - * - * In the descriptions of Object's methods, the parameter <i>symbol</i> refers - * to a symbol, which is either a quoted string or a - * <code>Symbol</code> (such as <code>:name</code>). - */ - -void -Init_Object(void) -{ -#undef rb_intern -#define rb_intern(str) rb_intern_const(str) - - VALUE metaclass; - - rb_cBasicObject = boot_defclass("BasicObject", 0); - rb_cObject = boot_defclass("Object", rb_cBasicObject); - rb_cModule = boot_defclass("Module", rb_cObject); - rb_cClass = boot_defclass("Class", rb_cModule); - - metaclass = rb_make_metaclass(rb_cBasicObject, rb_cClass); - metaclass = rb_make_metaclass(rb_cObject, metaclass); - metaclass = rb_make_metaclass(rb_cModule, metaclass); - metaclass = rb_make_metaclass(rb_cClass, metaclass); - - rb_define_private_method(rb_cBasicObject, "initialize", rb_obj_dummy, 0); - rb_define_alloc_func(rb_cBasicObject, rb_class_allocate_instance); - rb_define_method(rb_cBasicObject, "==", rb_obj_equal, 1); - rb_define_method(rb_cBasicObject, "equal?", rb_obj_equal, 1); - rb_define_method(rb_cBasicObject, "!", rb_obj_not, 0); - rb_define_method(rb_cBasicObject, "!=", rb_obj_not_equal, 1); - - rb_define_private_method(rb_cBasicObject, "singleton_method_added", rb_obj_dummy, 1); - rb_define_private_method(rb_cBasicObject, "singleton_method_removed", rb_obj_dummy, 1); - rb_define_private_method(rb_cBasicObject, "singleton_method_undefined", rb_obj_dummy, 1); - - rb_mKernel = rb_define_module("Kernel"); - rb_include_module(rb_cObject, rb_mKernel); - rb_define_private_method(rb_cClass, "inherited", rb_obj_dummy, 1); - rb_define_private_method(rb_cModule, "included", rb_obj_dummy, 1); - rb_define_private_method(rb_cModule, "extended", rb_obj_dummy, 1); - rb_define_private_method(rb_cModule, "method_added", rb_obj_dummy, 1); - rb_define_private_method(rb_cModule, "method_removed", rb_obj_dummy, 1); - rb_define_private_method(rb_cModule, "method_undefined", rb_obj_dummy, 1); - - rb_define_method(rb_mKernel, "nil?", rb_false, 0); - rb_define_method(rb_mKernel, "===", rb_equal, 1); - rb_define_method(rb_mKernel, "=~", rb_obj_match, 1); - rb_define_method(rb_mKernel, "!~", rb_obj_not_match, 1); - rb_define_method(rb_mKernel, "eql?", rb_obj_equal, 1); - - rb_define_method(rb_mKernel, "class", rb_obj_class, 0); - rb_define_method(rb_mKernel, "clone", rb_obj_clone, 0); - rb_define_method(rb_mKernel, "dup", rb_obj_dup, 0); - rb_define_method(rb_mKernel, "initialize_copy", rb_obj_init_copy, 1); - - rb_define_method(rb_mKernel, "taint", rb_obj_taint, 0); - rb_define_method(rb_mKernel, "tainted?", rb_obj_tainted, 0); - rb_define_method(rb_mKernel, "untaint", rb_obj_untaint, 0); - rb_define_method(rb_mKernel, "untrust", rb_obj_untrust, 0); - rb_define_method(rb_mKernel, "untrusted?", rb_obj_untrusted, 0); - rb_define_method(rb_mKernel, "trust", rb_obj_trust, 0); - rb_define_method(rb_mKernel, "freeze", rb_obj_freeze, 0); - rb_define_method(rb_mKernel, "frozen?", rb_obj_frozen_p, 0); - - rb_define_method(rb_mKernel, "to_s", rb_any_to_s, 0); - rb_define_method(rb_mKernel, "inspect", rb_obj_inspect, 0); - rb_define_method(rb_mKernel, "methods", rb_obj_methods, -1); - rb_define_method(rb_mKernel, "singleton_methods", rb_obj_singleton_methods, -1); /* in class.c */ - rb_define_method(rb_mKernel, "protected_methods", rb_obj_protected_methods, -1); - rb_define_method(rb_mKernel, "private_methods", rb_obj_private_methods, -1); - rb_define_method(rb_mKernel, "public_methods", rb_obj_public_methods, -1); - rb_define_method(rb_mKernel, "instance_variables", rb_obj_instance_variables, 0); /* in variable.c */ - rb_define_method(rb_mKernel, "instance_variable_get", rb_obj_ivar_get, 1); - rb_define_method(rb_mKernel, "instance_variable_set", rb_obj_ivar_set, 2); - rb_define_method(rb_mKernel, "instance_variable_defined?", rb_obj_ivar_defined, 1); - rb_define_private_method(rb_mKernel, "remove_instance_variable", - rb_obj_remove_instance_variable, 1); /* in variable.c */ - - rb_define_method(rb_mKernel, "instance_of?", rb_obj_is_instance_of, 1); - rb_define_method(rb_mKernel, "kind_of?", rb_obj_is_kind_of, 1); - rb_define_method(rb_mKernel, "is_a?", rb_obj_is_kind_of, 1); - rb_define_method(rb_mKernel, "tap", rb_obj_tap, 0); - - rb_define_global_function("sprintf", rb_f_sprintf, -1); /* in sprintf.c */ - rb_define_global_function("format", rb_f_sprintf, -1); /* in sprintf.c */ - - rb_define_global_function("Integer", rb_f_integer, 1); - rb_define_global_function("Float", rb_f_float, 1); - - rb_define_global_function("String", rb_f_string, 1); - rb_define_global_function("Array", rb_f_array, 1); - - rb_cNilClass = rb_define_class("NilClass", rb_cObject); - rb_define_method(rb_cNilClass, "to_i", nil_to_i, 0); - rb_define_method(rb_cNilClass, "to_f", nil_to_f, 0); - rb_define_method(rb_cNilClass, "to_s", nil_to_s, 0); - rb_define_method(rb_cNilClass, "to_a", nil_to_a, 0); - rb_define_method(rb_cNilClass, "inspect", nil_inspect, 0); - rb_define_method(rb_cNilClass, "&", false_and, 1); - rb_define_method(rb_cNilClass, "|", false_or, 1); - rb_define_method(rb_cNilClass, "^", false_xor, 1); - - rb_define_method(rb_cNilClass, "nil?", rb_true, 0); - rb_undef_alloc_func(rb_cNilClass); - rb_undef_method(CLASS_OF(rb_cNilClass), "new"); - rb_define_global_const("NIL", Qnil); - - rb_define_method(rb_cModule, "freeze", rb_mod_freeze, 0); - rb_define_method(rb_cModule, "===", rb_mod_eqq, 1); - rb_define_method(rb_cModule, "==", rb_obj_equal, 1); - rb_define_method(rb_cModule, "<=>", rb_mod_cmp, 1); - rb_define_method(rb_cModule, "<", rb_mod_lt, 1); - rb_define_method(rb_cModule, "<=", rb_class_inherited_p, 1); - rb_define_method(rb_cModule, ">", rb_mod_gt, 1); - rb_define_method(rb_cModule, ">=", rb_mod_ge, 1); - rb_define_method(rb_cModule, "initialize_copy", rb_mod_init_copy, 1); /* in class.c */ - rb_define_method(rb_cModule, "to_s", rb_mod_to_s, 0); - rb_define_method(rb_cModule, "included_modules", rb_mod_included_modules, 0); /* in class.c */ - rb_define_method(rb_cModule, "include?", rb_mod_include_p, 1); /* in class.c */ - rb_define_method(rb_cModule, "name", rb_mod_name, 0); /* in variable.c */ - rb_define_method(rb_cModule, "ancestors", rb_mod_ancestors, 0); /* in class.c */ - - rb_define_private_method(rb_cModule, "attr", rb_mod_attr, -1); - rb_define_private_method(rb_cModule, "attr_reader", rb_mod_attr_reader, -1); - rb_define_private_method(rb_cModule, "attr_writer", rb_mod_attr_writer, -1); - rb_define_private_method(rb_cModule, "attr_accessor", rb_mod_attr_accessor, -1); - - rb_define_alloc_func(rb_cModule, rb_module_s_alloc); - rb_define_method(rb_cModule, "initialize", rb_mod_initialize, 0); - rb_define_method(rb_cModule, "instance_methods", rb_class_instance_methods, -1); /* in class.c */ - rb_define_method(rb_cModule, "public_instance_methods", - rb_class_public_instance_methods, -1); /* in class.c */ - rb_define_method(rb_cModule, "protected_instance_methods", - rb_class_protected_instance_methods, -1); /* in class.c */ - rb_define_method(rb_cModule, "private_instance_methods", - rb_class_private_instance_methods, -1); /* in class.c */ - - rb_define_method(rb_cModule, "constants", rb_mod_constants, -1); /* in variable.c */ - rb_define_method(rb_cModule, "const_get", rb_mod_const_get, -1); - rb_define_method(rb_cModule, "const_set", rb_mod_const_set, 2); - rb_define_method(rb_cModule, "const_defined?", rb_mod_const_defined, -1); - rb_define_private_method(rb_cModule, "remove_const", - rb_mod_remove_const, 1); /* in variable.c */ - rb_define_method(rb_cModule, "const_missing", - rb_mod_const_missing, 1); /* in variable.c */ - rb_define_method(rb_cModule, "class_variables", - rb_mod_class_variables, 0); /* in variable.c */ - rb_define_method(rb_cModule, "remove_class_variable", - rb_mod_remove_cvar, 1); /* in variable.c */ - rb_define_method(rb_cModule, "class_variable_get", rb_mod_cvar_get, 1); - rb_define_method(rb_cModule, "class_variable_set", rb_mod_cvar_set, 2); - rb_define_method(rb_cModule, "class_variable_defined?", rb_mod_cvar_defined, 1); - - rb_define_method(rb_cClass, "allocate", rb_obj_alloc, 0); - rb_define_method(rb_cClass, "new", rb_class_new_instance, -1); - rb_define_method(rb_cClass, "initialize", rb_class_initialize, -1); - rb_define_method(rb_cClass, "initialize_copy", rb_class_init_copy, 1); /* in class.c */ - rb_define_method(rb_cClass, "superclass", rb_class_superclass, 0); - rb_define_alloc_func(rb_cClass, rb_class_s_alloc); - rb_undef_method(rb_cClass, "extend_object"); - rb_undef_method(rb_cClass, "append_features"); - - rb_cData = rb_define_class("Data", rb_cObject); - rb_undef_alloc_func(rb_cData); - - rb_cTrueClass = rb_define_class("TrueClass", rb_cObject); - rb_define_method(rb_cTrueClass, "to_s", true_to_s, 0); - rb_define_method(rb_cTrueClass, "&", true_and, 1); - rb_define_method(rb_cTrueClass, "|", true_or, 1); - rb_define_method(rb_cTrueClass, "^", true_xor, 1); - rb_undef_alloc_func(rb_cTrueClass); - rb_undef_method(CLASS_OF(rb_cTrueClass), "new"); - rb_define_global_const("TRUE", Qtrue); - - rb_cFalseClass = rb_define_class("FalseClass", rb_cObject); - rb_define_method(rb_cFalseClass, "to_s", false_to_s, 0); - rb_define_method(rb_cFalseClass, "&", false_and, 1); - rb_define_method(rb_cFalseClass, "|", false_or, 1); - rb_define_method(rb_cFalseClass, "^", false_xor, 1); - rb_undef_alloc_func(rb_cFalseClass); - rb_undef_method(CLASS_OF(rb_cFalseClass), "new"); - rb_define_global_const("FALSE", Qfalse); - - id_eq = rb_intern("=="); - id_eql = rb_intern("eql?"); - id_match = rb_intern("=~"); - id_inspect = rb_intern("inspect"); - id_init_copy = rb_intern("initialize_copy"); -} |