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/*
** object.c - Object, NilClass, TrueClass, FalseClass class
**
** See Copyright Notice in mruby.h
*/
#include <mruby.h>
#include <mruby/class.h>
#include <mruby/numeric.h>
#include <mruby/string.h>
#include <mruby/class.h>
MRB_API mrb_bool
mrb_obj_eq(mrb_state *mrb, mrb_value v1, mrb_value v2)
{
if (mrb_type(v1) != mrb_type(v2)) return FALSE;
switch (mrb_type(v1)) {
case MRB_TT_TRUE:
return TRUE;
case MRB_TT_FALSE:
case MRB_TT_FIXNUM:
return (mrb_fixnum(v1) == mrb_fixnum(v2));
case MRB_TT_SYMBOL:
return (mrb_symbol(v1) == mrb_symbol(v2));
#ifndef MRB_WITHOUT_FLOAT
case MRB_TT_FLOAT:
return (mrb_float(v1) == mrb_float(v2));
#endif
default:
return (mrb_ptr(v1) == mrb_ptr(v2));
}
}
MRB_API mrb_bool
mrb_obj_equal(mrb_state *mrb, mrb_value v1, mrb_value v2)
{
/* temporary definition */
return mrb_obj_eq(mrb, v1, v2);
}
MRB_API mrb_bool
mrb_equal(mrb_state *mrb, mrb_value obj1, mrb_value obj2)
{
mrb_value result;
if (mrb_obj_eq(mrb, obj1, obj2)) return TRUE;
result = mrb_funcall(mrb, obj1, "==", 1, obj2);
if (mrb_test(result)) return TRUE;
return FALSE;
}
/*
* Document-class: NilClass
*
* The class of the singleton object <code>nil</code>.
*/
/* 15.2.4.3.4 */
/*
* call_seq:
* nil.nil? -> true
*
* Only the object <i>nil</i> responds <code>true</code> to <code>nil?</code>.
*/
static mrb_value
mrb_true(mrb_state *mrb, mrb_value obj)
{
return mrb_true_value();
}
/* 15.2.4.3.5 */
/*
* call-seq:
* nil.to_s -> ""
*
* Always returns the empty string.
*/
static mrb_value
nil_to_s(mrb_state *mrb, mrb_value obj)
{
return mrb_str_new(mrb, 0, 0);
}
static mrb_value
nil_inspect(mrb_state *mrb, mrb_value obj)
{
return mrb_str_new_lit(mrb, "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.
*/
/* 15.2.5.3.1 */
/*
* 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 mrb_value
true_and(mrb_state *mrb, mrb_value obj)
{
mrb_bool obj2;
mrb_get_args(mrb, "b", &obj2);
return mrb_bool_value(obj2);
}
/* 15.2.5.3.2 */
/*
* 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 mrb_value
true_xor(mrb_state *mrb, mrb_value obj)
{
mrb_bool obj2;
mrb_get_args(mrb, "b", &obj2);
return mrb_bool_value(!obj2);
}
/* 15.2.5.3.3 */
/*
* call-seq:
* true.to_s -> "true"
*
* The string representation of <code>true</code> is "true".
*/
static mrb_value
true_to_s(mrb_state *mrb, mrb_value obj)
{
return mrb_str_new_lit(mrb, "true");
}
/* 15.2.5.3.4 */
/*
* 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 mrb_value
true_or(mrb_state *mrb, mrb_value obj)
{
return mrb_true_value();
}
/*
* 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.
*
*/
/* 15.2.4.3.1 */
/* 15.2.6.3.1 */
/*
* 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 mrb_value
false_and(mrb_state *mrb, mrb_value obj)
{
return mrb_false_value();
}
/* 15.2.4.3.2 */
/* 15.2.6.3.2 */
/*
* 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 mrb_value
false_xor(mrb_state *mrb, mrb_value obj)
{
mrb_bool obj2;
mrb_get_args(mrb, "b", &obj2);
return mrb_bool_value(obj2);
}
/* 15.2.4.3.3 */
/* 15.2.6.3.4 */
/*
* 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 mrb_value
false_or(mrb_state *mrb, mrb_value obj)
{
mrb_bool obj2;
mrb_get_args(mrb, "b", &obj2);
return mrb_bool_value(obj2);
}
/* 15.2.6.3.3 */
/*
* call-seq:
* false.to_s -> "false"
*
* 'nuf said...
*/
static mrb_value
false_to_s(mrb_state *mrb, mrb_value obj)
{
return mrb_str_new_lit(mrb, "false");
}
void
mrb_init_object(mrb_state *mrb)
{
struct RClass *n;
struct RClass *t;
struct RClass *f;
mrb->nil_class = n = mrb_define_class(mrb, "NilClass", mrb->object_class);
MRB_SET_INSTANCE_TT(n, MRB_TT_TRUE);
mrb_undef_class_method(mrb, n, "new");
mrb_define_method(mrb, n, "&", false_and, MRB_ARGS_REQ(1)); /* 15.2.4.3.1 */
mrb_define_method(mrb, n, "^", false_xor, MRB_ARGS_REQ(1)); /* 15.2.4.3.2 */
mrb_define_method(mrb, n, "|", false_or, MRB_ARGS_REQ(1)); /* 15.2.4.3.3 */
mrb_define_method(mrb, n, "nil?", mrb_true, MRB_ARGS_NONE()); /* 15.2.4.3.4 */
mrb_define_method(mrb, n, "to_s", nil_to_s, MRB_ARGS_NONE()); /* 15.2.4.3.5 */
mrb_define_method(mrb, n, "inspect", nil_inspect, MRB_ARGS_NONE());
mrb->true_class = t = mrb_define_class(mrb, "TrueClass", mrb->object_class);
MRB_SET_INSTANCE_TT(t, MRB_TT_TRUE);
mrb_undef_class_method(mrb, t, "new");
mrb_define_method(mrb, t, "&", true_and, MRB_ARGS_REQ(1)); /* 15.2.5.3.1 */
mrb_define_method(mrb, t, "^", true_xor, MRB_ARGS_REQ(1)); /* 15.2.5.3.2 */
mrb_define_method(mrb, t, "to_s", true_to_s, MRB_ARGS_NONE()); /* 15.2.5.3.3 */
mrb_define_method(mrb, t, "|", true_or, MRB_ARGS_REQ(1)); /* 15.2.5.3.4 */
mrb_define_method(mrb, t, "inspect", true_to_s, MRB_ARGS_NONE());
mrb->false_class = f = mrb_define_class(mrb, "FalseClass", mrb->object_class);
MRB_SET_INSTANCE_TT(f, MRB_TT_TRUE);
mrb_undef_class_method(mrb, f, "new");
mrb_define_method(mrb, f, "&", false_and, MRB_ARGS_REQ(1)); /* 15.2.6.3.1 */
mrb_define_method(mrb, f, "^", false_xor, MRB_ARGS_REQ(1)); /* 15.2.6.3.2 */
mrb_define_method(mrb, f, "to_s", false_to_s, MRB_ARGS_NONE()); /* 15.2.6.3.3 */
mrb_define_method(mrb, f, "|", false_or, MRB_ARGS_REQ(1)); /* 15.2.6.3.4 */
mrb_define_method(mrb, f, "inspect", false_to_s, MRB_ARGS_NONE());
}
static mrb_value
inspect_type(mrb_state *mrb, mrb_value val)
{
if (mrb_type(val) == MRB_TT_FALSE || mrb_type(val) == MRB_TT_TRUE) {
return mrb_inspect(mrb, val);
}
else {
return mrb_str_new_cstr(mrb, mrb_obj_classname(mrb, val));
}
}
static mrb_value
convert_type(mrb_state *mrb, mrb_value val, const char *tname, const char *method, mrb_bool raise)
{
mrb_sym m = 0;
m = mrb_intern_cstr(mrb, method);
if (!mrb_respond_to(mrb, val, m)) {
if (raise) {
mrb_raisef(mrb, E_TYPE_ERROR, "can't convert %S into %S", inspect_type(mrb, val), mrb_str_new_cstr(mrb, tname));
}
return mrb_nil_value();
}
return mrb_funcall_argv(mrb, val, m, 0, 0);
}
MRB_API mrb_value
mrb_check_to_integer(mrb_state *mrb, mrb_value val, const char *method)
{
mrb_value v;
if (mrb_fixnum_p(val)) return val;
v = convert_type(mrb, val, "Integer", method, FALSE);
if (mrb_nil_p(v) || !mrb_fixnum_p(v)) {
return mrb_nil_value();
}
return v;
}
MRB_API mrb_value
mrb_convert_type(mrb_state *mrb, mrb_value val, enum mrb_vtype type, const char *tname, const char *method)
{
mrb_value v;
if (mrb_type(val) == type) return val;
v = convert_type(mrb, val, tname, method, TRUE);
if (mrb_type(v) != type) {
mrb_raisef(mrb, E_TYPE_ERROR, "%S cannot be converted to %S by #%S", val,
mrb_str_new_cstr(mrb, tname), mrb_str_new_cstr(mrb, method));
}
return v;
}
MRB_API mrb_value
mrb_check_convert_type(mrb_state *mrb, mrb_value val, enum mrb_vtype type, const char *tname, const char *method)
{
mrb_value v;
if (mrb_type(val) == type && type != MRB_TT_DATA && type != MRB_TT_ISTRUCT) return val;
v = convert_type(mrb, val, tname, method, FALSE);
if (mrb_nil_p(v) || mrb_type(v) != type) return mrb_nil_value();
return v;
}
static const struct types {
unsigned char type;
const char *name;
} builtin_types[] = {
/* {MRB_TT_NIL, "nil"}, */
{MRB_TT_FALSE, "false"},
{MRB_TT_TRUE, "true"},
{MRB_TT_FIXNUM, "Fixnum"},
{MRB_TT_SYMBOL, "Symbol"}, /* :symbol */
{MRB_TT_MODULE, "Module"},
{MRB_TT_OBJECT, "Object"},
{MRB_TT_CLASS, "Class"},
{MRB_TT_ICLASS, "iClass"}, /* internal use: mixed-in module holder */
{MRB_TT_SCLASS, "SClass"},
{MRB_TT_PROC, "Proc"},
#ifndef MRB_WITHOUT_FLOAT
{MRB_TT_FLOAT, "Float"},
#endif
{MRB_TT_ARRAY, "Array"},
{MRB_TT_HASH, "Hash"},
{MRB_TT_STRING, "String"},
{MRB_TT_RANGE, "Range"},
/* {MRB_TT_BIGNUM, "Bignum"}, */
{MRB_TT_FILE, "File"},
{MRB_TT_DATA, "Data"}, /* internal use: wrapped C pointers */
/* {MRB_TT_VARMAP, "Varmap"}, */ /* internal use: dynamic variables */
/* {MRB_TT_NODE, "Node"}, */ /* internal use: syntax tree node */
/* {MRB_TT_UNDEF, "undef"}, */ /* internal use: #undef; should not happen */
{MRB_TT_MAXDEFINE, 0}
};
MRB_API void
mrb_check_type(mrb_state *mrb, mrb_value x, enum mrb_vtype t)
{
const struct types *type = builtin_types;
enum mrb_vtype xt;
xt = mrb_type(x);
if ((xt != t) || (xt == MRB_TT_DATA) || (xt == MRB_TT_ISTRUCT)) {
while (type->type < MRB_TT_MAXDEFINE) {
if (type->type == t) {
const char *etype;
if (mrb_nil_p(x)) {
etype = "nil";
}
else if (mrb_fixnum_p(x)) {
etype = "Fixnum";
}
else if (mrb_type(x) == MRB_TT_SYMBOL) {
etype = "Symbol";
}
else if (mrb_immediate_p(x)) {
etype = RSTRING_PTR(mrb_obj_as_string(mrb, x));
}
else {
etype = mrb_obj_classname(mrb, x);
}
mrb_raisef(mrb, E_TYPE_ERROR, "wrong argument type %S (expected %S)",
mrb_str_new_cstr(mrb, etype), mrb_str_new_cstr(mrb, type->name));
}
type++;
}
mrb_raisef(mrb, E_TYPE_ERROR, "unknown type %S (%S given)",
mrb_fixnum_value(t), mrb_fixnum_value(mrb_type(x)));
}
}
/* 15.3.1.3.46 */
/*
* 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."
*/
MRB_API mrb_value
mrb_any_to_s(mrb_state *mrb, mrb_value obj)
{
mrb_value str = mrb_str_new_capa(mrb, 20);
const char *cname = mrb_obj_classname(mrb, obj);
mrb_str_cat_lit(mrb, str, "#<");
mrb_str_cat_cstr(mrb, str, cname);
mrb_str_cat_lit(mrb, str, ":");
mrb_str_concat(mrb, str, mrb_ptr_to_str(mrb, mrb_ptr(obj)));
mrb_str_cat_lit(mrb, str, ">");
return str;
}
/*
* 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
*/
MRB_API mrb_bool
mrb_obj_is_kind_of(mrb_state *mrb, mrb_value obj, struct RClass *c)
{
struct RClass *cl = mrb_class(mrb, obj);
switch (c->tt) {
case MRB_TT_MODULE:
case MRB_TT_CLASS:
case MRB_TT_ICLASS:
case MRB_TT_SCLASS:
break;
default:
mrb_raise(mrb, E_TYPE_ERROR, "class or module required");
}
MRB_CLASS_ORIGIN(c);
while (cl) {
if (cl == c || cl->mt == c->mt)
return TRUE;
cl = cl->super;
}
return FALSE;
}
static mrb_value
mrb_to_integer(mrb_state *mrb, mrb_value val, const char *method)
{
mrb_value v;
if (mrb_fixnum_p(val)) return val;
v = convert_type(mrb, val, "Integer", method, TRUE);
if (!mrb_obj_is_kind_of(mrb, v, mrb->fixnum_class)) {
mrb_value type = inspect_type(mrb, val);
mrb_raisef(mrb, E_TYPE_ERROR, "can't convert %S to Integer (%S#%S gives %S)",
type, type, mrb_str_new_cstr(mrb, method), inspect_type(mrb, v));
}
return v;
}
MRB_API mrb_value
mrb_to_int(mrb_state *mrb, mrb_value val)
{
return mrb_to_integer(mrb, val, "to_int");
}
MRB_API mrb_value
mrb_convert_to_integer(mrb_state *mrb, mrb_value val, mrb_int base)
{
mrb_value tmp;
if (mrb_nil_p(val)) {
if (base != 0) goto arg_error;
mrb_raise(mrb, E_TYPE_ERROR, "can't convert nil into Integer");
}
switch (mrb_type(val)) {
#ifndef MRB_WITHOUT_FLOAT
case MRB_TT_FLOAT:
if (base != 0) goto arg_error;
else {
mrb_float f = mrb_float(val);
if (FIXABLE_FLOAT(f)) {
break;
}
}
return mrb_flo_to_fixnum(mrb, val);
#endif
case MRB_TT_FIXNUM:
if (base != 0) goto arg_error;
return val;
case MRB_TT_STRING:
string_conv:
return mrb_str_to_inum(mrb, val, base, TRUE);
default:
break;
}
if (base != 0) {
tmp = mrb_check_string_type(mrb, val);
if (!mrb_nil_p(tmp)) {
val = tmp;
goto string_conv;
}
arg_error:
mrb_raise(mrb, E_ARGUMENT_ERROR, "base specified for non string value");
}
tmp = convert_type(mrb, val, "Integer", "to_int", FALSE);
if (mrb_nil_p(tmp) || !mrb_fixnum_p(tmp)) {
tmp = mrb_to_integer(mrb, val, "to_i");
}
return tmp;
}
MRB_API mrb_value
mrb_Integer(mrb_state *mrb, mrb_value val)
{
return mrb_convert_to_integer(mrb, val, 0);
}
#ifndef MRB_WITHOUT_FLOAT
MRB_API mrb_value
mrb_Float(mrb_state *mrb, mrb_value val)
{
if (mrb_nil_p(val)) {
mrb_raise(mrb, E_TYPE_ERROR, "can't convert nil into Float");
}
switch (mrb_type(val)) {
case MRB_TT_FIXNUM:
return mrb_float_value(mrb, (mrb_float)mrb_fixnum(val));
case MRB_TT_FLOAT:
return val;
case MRB_TT_STRING:
return mrb_float_value(mrb, mrb_str_to_dbl(mrb, val, TRUE));
default:
return mrb_convert_type(mrb, val, MRB_TT_FLOAT, "Float", "to_f");
}
}
#endif
MRB_API mrb_value
mrb_inspect(mrb_state *mrb, mrb_value obj)
{
return mrb_obj_as_string(mrb, mrb_funcall(mrb, obj, "inspect", 0));
}
MRB_API mrb_bool
mrb_eql(mrb_state *mrb, mrb_value obj1, mrb_value obj2)
{
if (mrb_obj_eq(mrb, obj1, obj2)) return TRUE;
return mrb_test(mrb_funcall(mrb, obj1, "eql?", 1, obj2));
}