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mruby/src/variable.c at mruby2-draft · tomas/mruby · GitHub
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/*
** variable.c - mruby variables
**
** See Copyright Notice in mruby.h
*/
#include
<mruby.h>
#include
<mruby/array.h>
#include
<mruby/class.h>
#include
<mruby/proc.h>
#include
<mruby/string.h>
typedef
int
(
iv_foreach_func
)(
mrb_state
*
,
mrb_sym
,
mrb_value
,
void
*
);
#ifndef
MRB_IV_SEGMENT_SIZE
#define
MRB_IV_SEGMENT_SIZE
4
#endif
typedef
struct
segment
{
mrb_sym
key
[
MRB_IV_SEGMENT_SIZE
];
mrb_value
val
[
MRB_IV_SEGMENT_SIZE
];
struct
segment
*
next
;
}
segment
;
/* Instance variable table structure */
typedef
struct
iv_tbl
{
segment
*
rootseg
;
size_t
size
;
size_t
last_len
;
}
iv_tbl
;
/* Creates the instance variable table. */
static
iv_tbl
*
iv_new
(
mrb_state
*
mrb
)
{
iv_tbl
*
t
;
t
=
(
iv_tbl
*
)
mrb_malloc
(
mrb
,
sizeof
(
iv_tbl
));
t
->
size
=
0
;
t
->
rootseg
=
NULL
;
t
->
last_len
=
0
;
return
t
;
}
/* Set the value for the symbol in the instance variable table. */
static
void
iv_put
(
mrb_state
*
mrb
,
iv_tbl
*
t
,
mrb_sym
sym
,
mrb_value
val
)
{
segment
*
seg
;
segment
*
prev
=
NULL
;
segment
*
matched_seg
=
NULL
;
size_t
matched_idx
=
0
;
size_t
i
;
if
(
t
==
NULL
)
return
;
seg
=
t
->
rootseg
;
while
(
seg
) {
for
(
i
=
0
;
i
<
MRB_IV_SEGMENT_SIZE
;
i
++
) {
mrb_sym
key
=
seg
->
key
[
i
];
/* Found room in last segment after last_len */
if
(!
seg
->
next
&&
i
>=
t
->
last_len
) {
seg
->
key
[
i
]
=
sym
;
seg
->
val
[
i
]
=
val
;
t
->
last_len
=
i
+
1
;
t
->
size
++
;
return
;
}
if
(!
matched_seg
&&
key
==
0
) {
matched_seg
=
seg
;
matched_idx
=
i
;
}
else
if
(
key
==
sym
) {
seg
->
val
[
i
]
=
val
;
return
;
}
}
prev
=
seg
;
seg
=
seg
->
next
;
}
/* Not found */
t
->
size
++
;
if
(
matched_seg
) {
matched_seg
->
key
[
matched_idx
]
=
sym
;
matched_seg
->
val
[
matched_idx
]
=
val
;
return
;
}
seg
=
(
segment
*
)
mrb_malloc
(
mrb
,
sizeof
(
segment
));
if
(!
seg
)
return
;
seg
->
next
=
NULL
;
seg
->
key
[
0
]
=
sym
;
seg
->
val
[
0
]
=
val
;
t
->
last_len
=
1
;
if
(
prev
) {
prev
->
next
=
seg
;
}
else
{
t
->
rootseg
=
seg
;
}
}
/* Get a value for a symbol from the instance variable table. */
static
mrb_bool
iv_get
(
mrb_state
*
mrb
,
iv_tbl
*
t
,
mrb_sym
sym
,
mrb_value
*
vp
)
{
segment
*
seg
;
size_t
i
;
if
(
t
==
NULL
)
return
FALSE;
seg
=
t
->
rootseg
;
while
(
seg
) {
for
(
i
=
0
;
i
<
MRB_IV_SEGMENT_SIZE
;
i
++
) {
mrb_sym
key
=
seg
->
key
[
i
];
if
(!
seg
->
next
&&
i
>=
t
->
last_len
) {
return
FALSE;
}
if
(
key
==
sym
) {
if
(
vp
)
*
vp
=
seg
->
val
[
i
];
return
TRUE;
}
}
seg
=
seg
->
next
;
}
return
FALSE;
}
/* Deletes the value for the symbol from the instance variable table. */
static
mrb_bool
iv_del
(
mrb_state
*
mrb
,
iv_tbl
*
t
,
mrb_sym
sym
,
mrb_value
*
vp
)
{
segment
*
seg
;
size_t
i
;
if
(
t
==
NULL
)
return
FALSE;
seg
=
t
->
rootseg
;
while
(
seg
) {
for
(
i
=
0
;
i
<
MRB_IV_SEGMENT_SIZE
;
i
++
) {
mrb_sym
key
=
seg
->
key
[
i
];
if
(!
seg
->
next
&&
i
>=
t
->
last_len
) {
return
FALSE;
}
if
(
key
==
sym
) {
t
->
size
--
;
seg
->
key
[
i
]
=
0
;
if
(
vp
)
*
vp
=
seg
->
val
[
i
];
return
TRUE;
}
}
seg
=
seg
->
next
;
}
return
FALSE;
}
/* Iterates over the instance variable table. */
static
mrb_bool
iv_foreach
(
mrb_state
*
mrb
,
iv_tbl
*
t
,
iv_foreach_func
*
func
,
void
*
p
)
{
segment
*
seg
;
size_t
i
;
int
n
;
if
(
t
==
NULL
)
return
TRUE;
seg
=
t
->
rootseg
;
while
(
seg
) {
for
(
i
=
0
;
i
<
MRB_IV_SEGMENT_SIZE
;
i
++
) {
mrb_sym
key
=
seg
->
key
[
i
];
/* no value in last segment after last_len */
if
(!
seg
->
next
&&
i
>=
t
->
last_len
) {
return
FALSE;
}
if
(
key
!=
0
) {
n
=
(
*
func
)(
mrb
,
key
,
seg
->
val
[
i
],
p
);
if
(
n
>
0
)
return
FALSE;
if
(
n
<
0
) {
t
->
size
--
;
seg
->
key
[
i
]
=
0
;
}
}
}
seg
=
seg
->
next
;
}
return
TRUE;
}
/* Get the size of the instance variable table. */
static
size_t
iv_size
(
mrb_state
*
mrb
,
iv_tbl
*
t
)
{
segment
*
seg
;
size_t
size
=
0
;
if
(
t
==
NULL
)
return
0
;
if
(
t
->
size
>
0
)
return
t
->
size
;
seg
=
t
->
rootseg
;
while
(
seg
) {
if
(
seg
->
next
==
NULL
) {
size
+=
t
->
last_len
;
return
size
;
}
seg
=
seg
->
next
;
size
+=
MRB_IV_SEGMENT_SIZE
;
}
/* empty iv_tbl */
return
0
;
}
/* Copy the instance variable table. */
static
iv_tbl
*
iv_copy
(
mrb_state
*
mrb
,
iv_tbl
*
t
)
{
segment
*
seg
;
iv_tbl
*
t2
;
size_t
i
;
seg
=
t
->
rootseg
;
t2
=
iv_new
(
mrb
);
while
(
seg
!=
NULL
) {
for
(
i
=
0
;
i
<
MRB_IV_SEGMENT_SIZE
;
i
++
) {
mrb_sym
key
=
seg
->
key
[
i
];
mrb_value
val
=
seg
->
val
[
i
];
if
((
seg
->
next
==
NULL
)
&&
(
i
>=
t
->
last_len
)) {
return
t2
;
}
iv_put
(
mrb
,
t2
,
key
,
val
);
}
seg
=
seg
->
next
;
}
return
t2
;
}
/* Free memory of the instance variable table. */
static
void
iv_free
(
mrb_state
*
mrb
,
iv_tbl
*
t
)
{
segment
*
seg
;
seg
=
t
->
rootseg
;
while
(
seg
) {
segment
*
p
=
seg
;
seg
=
seg
->
next
;
mrb_free
(
mrb
,
p
);
}
mrb_free
(
mrb
,
t
);
}
static
int
iv_mark_i
(
mrb_state
*
mrb
,
mrb_sym
sym
,
mrb_value
v
,
void
*
p
)
{
mrb_gc_mark_value
(
mrb
,
v
);
return
0
;
}
static
void
mark_tbl
(
mrb_state
*
mrb
,
iv_tbl
*
t
)
{
iv_foreach
(
mrb
,
t
,
iv_mark_i
,
0
);
}
void
mrb_gc_mark_gv
(
mrb_state
*
mrb
)
{
mark_tbl
(
mrb
,
mrb
->
globals
);
}
void
mrb_gc_free_gv
(
mrb_state
*
mrb
)
{
if
(
mrb
->
globals
)
iv_free
(
mrb
,
mrb
->
globals
);
}
void
mrb_gc_mark_iv
(
mrb_state
*
mrb
,
struct
RObject
*
obj
)
{
mark_tbl
(
mrb
,
obj
->
iv
);
}
size_t
mrb_gc_mark_iv_size
(
mrb_state
*
mrb
,
struct
RObject
*
obj
)
{
return
iv_size
(
mrb
,
obj
->
iv
);
}
void
mrb_gc_free_iv
(
mrb_state
*
mrb
,
struct
RObject
*
obj
)
{
if
(
obj
->
iv
) {
iv_free
(
mrb
,
obj
->
iv
);
}
}
mrb_value
mrb_vm_special_get
(
mrb_state
*
mrb
,
mrb_sym
i
)
{
return
mrb_fixnum_value
(
0
);
}
void
mrb_vm_special_set
(
mrb_state
*
mrb
,
mrb_sym
i
,
mrb_value
v
)
{
}
static
mrb_bool
obj_iv_p
(
mrb_value
obj
)
{
switch
(
mrb_type
(
obj
)) {
case
MRB_TT_OBJECT
:
case
MRB_TT_CLASS
:
case
MRB_TT_MODULE
:
case
MRB_TT_SCLASS
:
case
MRB_TT_HASH
:
case
MRB_TT_DATA
:
case
MRB_TT_EXCEPTION
:
return
TRUE;
default
:
return
FALSE;
}
}
MRB_API
mrb_value
mrb_obj_iv_get
(
mrb_state
*
mrb
,
struct
RObject
*
obj
,
mrb_sym
sym
)
{
mrb_value
v
;
if
(
obj
->
iv
&&
iv_get
(
mrb
,
obj
->
iv
,
sym
,
&
v
))
return
v
;
return
mrb_nil_value
();
}
MRB_API
mrb_value
mrb_iv_get
(
mrb_state
*
mrb
,
mrb_value
obj
,
mrb_sym
sym
)
{
if
(
obj_iv_p
(
obj
)) {
return
mrb_obj_iv_get
(
mrb
,
mrb_obj_ptr
(
obj
),
sym
);
}
return
mrb_nil_value
();
}
MRB_API
void
mrb_obj_iv_set
(
mrb_state
*
mrb
,
struct
RObject
*
obj
,
mrb_sym
sym
,
mrb_value
v
)
{
iv_tbl
*
t
;
if
(
MRB_FROZEN_P
(
obj
)) {
mrb_raisef
(
mrb
,
E_FROZEN_ERROR
,
"can't modify frozen %S"
,
mrb_obj_value
(
obj
));
}
if
(!
obj
->
iv
) {
obj
->
iv
=
iv_new
(
mrb
);
}
t
=
obj
->
iv
;
iv_put
(
mrb
,
t
,
sym
,
v
);
mrb_write_barrier
(
mrb
, (
struct
RBasic
*
)
obj
);
}
MRB_API
void
mrb_iv_set
(
mrb_state
*
mrb
,
mrb_value
obj
,
mrb_sym
sym
,
mrb_value
v
)
{
if
(
obj_iv_p
(
obj
)) {
mrb_obj_iv_set
(
mrb
,
mrb_obj_ptr
(
obj
),
sym
,
v
);
}
else
{
mrb_raise
(
mrb
,
E_ARGUMENT_ERROR
,
"cannot set instance variable"
);
}
}
MRB_API
mrb_bool
mrb_obj_iv_defined
(
mrb_state
*
mrb
,
struct
RObject
*
obj
,
mrb_sym
sym
)
{
iv_tbl
*
t
;
t
=
obj
->
iv
;
if
(
t
) {
return
iv_get
(
mrb
,
t
,
sym
,
NULL
);
}
return
FALSE;
}
MRB_API
mrb_bool
mrb_iv_defined
(
mrb_state
*
mrb
,
mrb_value
obj
,
mrb_sym
sym
)
{
if
(!
obj_iv_p
(
obj
))
return
FALSE;
return
mrb_obj_iv_defined
(
mrb
,
mrb_obj_ptr
(
obj
),
sym
);
}
#define
identchar
(
c
) (ISALNUM(c) || (c) == '_' || !ISASCII(c))
MRB_API
mrb_bool
mrb_iv_name_sym_p
(
mrb_state
*
mrb
,
mrb_sym
iv_name
)
{
const
char
*
s
;
mrb_int
i
,
len
;
s
=
mrb_sym2name_len
(
mrb
,
iv_name
,
&
len
);
if
(
len
<
2
)
return
FALSE;
if
(
s
[
0
]
!=
'@'
)
return
FALSE;
if
(
s
[
1
]
==
'@'
)
return
FALSE;
for
(
i
=
1
;
i
<
len
;
i
++
) {
if
(!
identchar
(
s
[
i
]))
return
FALSE;
}
return
TRUE;
}
MRB_API
void
mrb_iv_name_sym_check
(
mrb_state
*
mrb
,
mrb_sym
iv_name
)
{
if
(!
mrb_iv_name_sym_p
(
mrb
,
iv_name
)) {
mrb_name_error
(
mrb
,
iv_name
,
"'%S' is not allowed as an instance variable name"
,
mrb_sym2str
(
mrb
,
iv_name
));
}
}
MRB_API
void
mrb_iv_copy
(
mrb_state
*
mrb
,
mrb_value
dest
,
mrb_value
src
)
{
struct
RObject
*
d
=
mrb_obj_ptr
(
dest
);
struct
RObject
*
s
=
mrb_obj_ptr
(
src
);
if
(
d
->
iv
) {
iv_free
(
mrb
,
d
->
iv
);
d
->
iv
=
0
;
}
if
(
s
->
iv
) {
mrb_write_barrier
(
mrb
, (
struct
RBasic
*
)
d
);
d
->
iv
=
iv_copy
(
mrb
,
s
->
iv
);
}
}
static
int
inspect_i
(
mrb_state
*
mrb
,
mrb_sym
sym
,
mrb_value
v
,
void
*
p
)
{
mrb_value
str
=
*
(
mrb_value
*
)
p
;
const
char
*
s
;
mrb_int
len
;
mrb_value
ins
;
char
*
sp
=
RSTRING_PTR
(
str
);
/* need not to show internal data */
if
(
sp
[
0
]
==
'-'
) {
/* first element */
sp
[
0
]
=
'#'
;
mrb_str_cat_lit
(
mrb
,
str
,
" "
);
}
else
{
mrb_str_cat_lit
(
mrb
,
str
,
", "
);
}
s
=
mrb_sym2name_len
(
mrb
,
sym
,
&
len
);
mrb_str_cat
(
mrb
,
str
,
s
,
len
);
mrb_str_cat_lit
(
mrb
,
str
,
"="
);
if
(
mrb_type
(
v
)
==
MRB_TT_OBJECT
) {
ins
=
mrb_any_to_s
(
mrb
,
v
);
}
else
{
ins
=
mrb_inspect
(
mrb
,
v
);
}
mrb_str_cat_str
(
mrb
,
str
,
ins
);
return
0
;
}
mrb_value
mrb_obj_iv_inspect
(
mrb_state
*
mrb
,
struct
RObject
*
obj
)
{
iv_tbl
*
t
=
obj
->
iv
;
size_t
len
=
iv_size
(
mrb
,
t
);
if
(
len
>
0
) {
const
char
*
cn
=
mrb_obj_classname
(
mrb
,
mrb_obj_value
(
obj
));
mrb_value
str
=
mrb_str_new_capa
(
mrb
,
30
);
mrb_str_cat_lit
(
mrb
,
str
,
"-<"
);
mrb_str_cat_cstr
(
mrb
,
str
,
cn
);
mrb_str_cat_lit
(
mrb
,
str
,
":"
);
mrb_str_concat
(
mrb
,
str
,
mrb_ptr_to_str
(
mrb
,
obj
));
iv_foreach
(
mrb
,
t
,
inspect_i
,
&
str
);
mrb_str_cat_lit
(
mrb
,
str
,
">"
);
return
str
;
}
return
mrb_any_to_s
(
mrb
,
mrb_obj_value
(
obj
));
}
MRB_API
mrb_value
mrb_iv_remove
(
mrb_state
*
mrb
,
mrb_value
obj
,
mrb_sym
sym
)
{
if
(
obj_iv_p
(
obj
)) {
iv_tbl
*
t
=
mrb_obj_ptr
(
obj
)
->
iv
;
mrb_value
val
;
if
(
iv_del
(
mrb
,
t
,
sym
,
&
val
)) {
return
val
;
}
}
return
mrb_undef_value
();
}
static
int
iv_i
(
mrb_state
*
mrb
,
mrb_sym
sym
,
mrb_value
v
,
void
*
p
)
{
mrb_value
ary
;
const
char
*
s
;
mrb_int
len
;
ary
=
*
(
mrb_value
*
)
p
;
s
=
mrb_sym2name_len
(
mrb
,
sym
,
&
len
);
if
(
len
>
1
&&
s
[
0
]
==
'@'
&&
s
[
1
]
!=
'@'
) {
mrb_ary_push
(
mrb
,
ary
,
mrb_symbol_value
(
sym
));
}
return
0
;
}
/* 15.3.1.3.23 */
/*
* call-seq:
* obj.instance_variables -> array
*
* Returns an array of instance variable names for the receiver. Note
* that simply defining an accessor does not create the corresponding
* instance variable.
*
* class Fred
* attr_accessor :a1
* def initialize
* @iv = 3
* end
* end
* Fred.new.instance_variables #=> [:@iv]
*/
mrb_value
mrb_obj_instance_variables
(
mrb_state
*
mrb
,
mrb_value
self
)
{
mrb_value
ary
;
ary
=
mrb_ary_new
(
mrb
);
if
(
obj_iv_p
(
self
)) {
iv_foreach
(
mrb
,
mrb_obj_ptr
(
self
)
->
iv
,
iv_i
,
&
ary
);
}
return
ary
;
}
static
int
cv_i
(
mrb_state
*
mrb
,
mrb_sym
sym
,
mrb_value
v
,
void
*
p
)
{
mrb_value
ary
;
const
char
*
s
;
mrb_int
len
;
ary
=
*
(
mrb_value
*
)
p
;
s
=
mrb_sym2name_len
(
mrb
,
sym
,
&
len
);
if
(
len
>
2
&&
s
[
0
]
==
'@'
&&
s
[
1
]
==
'@'
) {
mrb_ary_push
(
mrb
,
ary
,
mrb_symbol_value
(
sym
));
}
return
0
;
}
/* 15.2.2.4.19 */
/*
* call-seq:
* mod.class_variables -> array
*
* Returns an array of the names of class variables in <i>mod</i>.
*
* class One
* @@var1 = 1
* end
* class Two < One
* @@var2 = 2
* end
* One.class_variables #=> [:@@var1]
* Two.class_variables #=> [:@@var2]
*/
mrb_value
mrb_mod_class_variables
(
mrb_state
*
mrb
,
mrb_value
mod
)
{
mrb_value
ary
;
struct
RClass
*
c
;
ary
=
mrb_ary_new
(
mrb
);
c
=
mrb_class_ptr
(
mod
);
while
(
c
) {
iv_foreach
(
mrb
,
c
->
iv
,
cv_i
,
&
ary
);
c
=
c
->
super
;
}
return
ary
;
}
MRB_API
mrb_value
mrb_mod_cv_get
(
mrb_state
*
mrb
,
struct
RClass
*
c
,
mrb_sym
sym
)
{
struct
RClass
*
cls
=
c
;
mrb_value
v
;
int
given
=
FALSE;
while
(
c
) {
if
(
c
->
iv
&&
iv_get
(
mrb
,
c
->
iv
,
sym
,
&
v
)) {
given
=
TRUE;
}
c
=
c
->
super
;
}
if
(
given
)
return
v
;
if
(
cls
&&
cls
->
tt
==
MRB_TT_SCLASS
) {
mrb_value
klass
;
klass
=
mrb_obj_iv_get
(
mrb
, (
struct
RObject
*
)
cls
,
mrb_intern_lit
(
mrb
,
"__attached__"
));
c
=
mrb_class_ptr
(
klass
);
if
(
c
->
tt
==
MRB_TT_CLASS
||
c
->
tt
==
MRB_TT_MODULE
) {
given
=
FALSE;
while
(
c
) {
if
(
c
->
iv
&&
iv_get
(
mrb
,
c
->
iv
,
sym
,
&
v
)) {
given
=
TRUE;
}
c
=
c
->
super
;
}
if
(
given
)
return
v
;
}
}
mrb_name_error
(
mrb
,
sym
,
"uninitialized class variable %S in %S"
,
mrb_sym2str
(
mrb
,
sym
),
mrb_obj_value
(
cls
));
/* not reached */
return
mrb_nil_value
();
}
MRB_API
mrb_value
mrb_cv_get
(
mrb_state
*
mrb
,
mrb_value
mod
,
mrb_sym
sym
)
{
return
mrb_mod_cv_get
(
mrb
,
mrb_class_ptr
(
mod
),
sym
);
}
MRB_API
void
mrb_mod_cv_set
(
mrb_state
*
mrb
,
struct
RClass
*
c
,
mrb_sym
sym
,
mrb_value
v
)
{
struct
RClass
*
cls
=
c
;
while
(
c
) {
iv_tbl
*
t
=
c
->
iv
;
if
(
iv_get
(
mrb
,
t
,
sym
,
NULL
)) {
iv_put
(
mrb
,
t
,
sym
,
v
);
mrb_write_barrier
(
mrb
, (
struct
RBasic
*
)
c
);
return
;
}
c
=
c
->
super
;
}
if
(
cls
&&
cls
->
tt
==
MRB_TT_SCLASS
) {
mrb_value
klass
;
klass
=
mrb_obj_iv_get
(
mrb
, (
struct
RObject
*
)
cls
,
mrb_intern_lit
(
mrb
,
"__attached__"
));
switch
(
mrb_type
(
klass
)) {
case
MRB_TT_CLASS
:
case
MRB_TT_MODULE
:
case
MRB_TT_SCLASS
:
c
=
mrb_class_ptr
(
klass
);
break
;
default
:
c
=
cls
;
break
;
}
}
else
{
c
=
cls
;
}
if
(!
c
->
iv
) {
c
->
iv
=
iv_new
(
mrb
);
}
iv_put
(
mrb
,
c
->
iv
,
sym
,
v
);
mrb_write_barrier
(
mrb
, (
struct
RBasic
*
)
c
);
}
MRB_API
void
mrb_cv_set
(
mrb_state
*
mrb
,
mrb_value
mod
,
mrb_sym
sym
,
mrb_value
v
)
{
mrb_mod_cv_set
(
mrb
,
mrb_class_ptr
(
mod
),
sym
,
v
);
}
MRB_API
mrb_bool
mrb_mod_cv_defined
(
mrb_state
*
mrb
,
struct
RClass
*
c
,
mrb_sym
sym
)
{
while
(
c
) {
iv_tbl
*
t
=
c
->
iv
;
if
(
iv_get
(
mrb
,
t
,
sym
,
NULL
))
return
TRUE;
c
=
c
->
super
;
}
return
FALSE;
}
MRB_API
mrb_bool
mrb_cv_defined
(
mrb_state
*
mrb
,
mrb_value
mod
,
mrb_sym
sym
)
{
return
mrb_mod_cv_defined
(
mrb
,
mrb_class_ptr
(
mod
),
sym
);
}
mrb_value
mrb_vm_cv_get
(
mrb_state
*
mrb
,
mrb_sym
sym
)
{
struct
RClass
*
c
;
c
=
MRB_PROC_TARGET_CLASS
(
mrb
->
c
->
ci
->
proc
);
return
mrb_mod_cv_get
(
mrb
,
c
,
sym
);
}
void
mrb_vm_cv_set
(
mrb_state
*
mrb
,
mrb_sym
sym
,
mrb_value
v
)
{
struct
RClass
*
c
;
c
=
MRB_PROC_TARGET_CLASS
(
mrb
->
c
->
ci
->
proc
);
mrb_mod_cv_set
(
mrb
,
c
,
sym
,
v
);
}
static
void
mod_const_check
(
mrb_state
*
mrb
,
mrb_value
mod
)
{
switch
(
mrb_type
(
mod
)) {
case
MRB_TT_CLASS
:
case
MRB_TT_MODULE
:
case
MRB_TT_SCLASS
:
break
;
default
:
mrb_raise
(
mrb
,
E_TYPE_ERROR
,
"constant look-up for non class/module"
);
break
;
}
}
static
mrb_value
const_get
(
mrb_state
*
mrb
,
struct
RClass
*
base
,
mrb_sym
sym
)
{
struct
RClass
*
c
=
base
;
mrb_value
v
;
mrb_bool
retry
=
FALSE;
mrb_value
name
;
L_RETRY
:
while
(
c
) {
if
(
c
->
iv
) {
if
(
iv_get
(
mrb
,
c
->
iv
,
sym
,
&
v
))
return
v
;
}
c
=
c
->
super
;
}
if
(!
retry
&&
base
->
tt
==
MRB_TT_MODULE
) {
c
=
mrb
->
object_class
;
retry
=
TRUE;
goto
L_RETRY
;
}
name
=
mrb_symbol_value
(
sym
);
return
mrb_funcall_argv
(
mrb
,
mrb_obj_value
(
base
),
mrb_intern_lit
(
mrb
,
"const_missing"
),
1
,
&
name
);
}
MRB_API
mrb_value
mrb_const_get
(
mrb_state
*
mrb
,
mrb_value
mod
,
mrb_sym
sym
)
{
mod_const_check
(
mrb
,
mod
);
return
const_get
(
mrb
,
mrb_class_ptr
(
mod
),
sym
);
}
mrb_value
mrb_vm_const_get
(
mrb_state
*
mrb
,
mrb_sym
sym
)
{
struct
RClass
*
c
;
struct
RClass
*
c2
;
mrb_value
v
;
struct
RProc
*
proc
;
c
=
MRB_PROC_TARGET_CLASS
(
mrb
->
c
->
ci
->
proc
);
if
(
iv_get
(
mrb
,
c
->
iv
,
sym
,
&
v
)) {
return
v
;
}
c2
=
c
;
while
(
c2
&&
c2
->
tt
==
MRB_TT_SCLASS
) {
mrb_value
klass
;
if
(!
iv_get
(
mrb
,
c2
->
iv
,
mrb_intern_lit
(
mrb
,
"__attached__"
),
&
klass
)) {
c2
=
NULL
;
break
;
}
c2
=
mrb_class_ptr
(
klass
);
}
if
(
c2
&&
(
c2
->
tt
==
MRB_TT_CLASS
||
c2
->
tt
==
MRB_TT_MODULE
))
c
=
c2
;
mrb_assert
(!
MRB_PROC_CFUNC_P
(
mrb
->
c
->
ci
->
proc
));
proc
=
mrb
->
c
->
ci
->
proc
;
while
(
proc
) {
c2
=
MRB_PROC_TARGET_CLASS
(
proc
);
if
(
c2
&&
iv_get
(
mrb
,
c2
->
iv
,
sym
,
&
v
)) {
return
v
;
}
proc
=
proc
->
upper
;
}
return
const_get
(
mrb
,
c
,
sym
);
}
MRB_API
void
mrb_const_set
(
mrb_state
*
mrb
,
mrb_value
mod
,
mrb_sym
sym
,
mrb_value
v
)
{
mod_const_check
(
mrb
,
mod
);
if
(
mrb_type
(
v
)
==
MRB_TT_CLASS
||
mrb_type
(
v
)
==
MRB_TT_MODULE
) {
mrb_class_name_class
(
mrb
,
mrb_class_ptr
(
mod
),
mrb_class_ptr
(
v
),
sym
);
}
mrb_iv_set
(
mrb
,
mod
,
sym
,
v
);
}
void
mrb_vm_const_set
(
mrb_state
*
mrb
,
mrb_sym
sym
,
mrb_value
v
)
{
struct
RClass
*
c
;
c
=
MRB_PROC_TARGET_CLASS
(
mrb
->
c
->
ci
->
proc
);
mrb_obj_iv_set
(
mrb
, (
struct
RObject
*
)
c
,
sym
,
v
);
}
MRB_API
void
mrb_const_remove
(
mrb_state
*
mrb
,
mrb_value
mod
,
mrb_sym
sym
)
{
mod_const_check
(
mrb
,
mod
);
mrb_iv_remove
(
mrb
,
mod
,
sym
);
}
MRB_API
void
mrb_define_const
(
mrb_state
*
mrb
,
struct
RClass
*
mod
,
const
char
*
name
,
mrb_value
v
)
{
mrb_obj_iv_set
(
mrb
, (
struct
RObject
*
)
mod
,
mrb_intern_cstr
(
mrb
,
name
),
v
);
}
MRB_API
void
mrb_define_global_const
(
mrb_state
*
mrb
,
const
char
*
name
,
mrb_value
val
)
{
mrb_define_const
(
mrb
,
mrb
->
object_class
,
name
,
val
);
}
static
int
const_i
(
mrb_state
*
mrb
,
mrb_sym
sym
,
mrb_value
v
,
void
*
p
)
{
mrb_value
ary
;
const
char
*
s
;
mrb_int
len
;
ary
=
*
(
mrb_value
*
)
p
;
s
=
mrb_sym2name_len
(
mrb
,
sym
,
&
len
);
if
(
len
>=
1
&&
ISUPPER
(
s
[
0
])) {
mrb_ary_push
(
mrb
,
ary
,
mrb_symbol_value
(
sym
));
}
return
0
;
}
/* 15.2.2.4.24 */
/*
* call-seq:
* mod.constants -> array
*
* Returns an array of all names of contants defined in the receiver.
*/
mrb_value
mrb_mod_constants
(
mrb_state
*
mrb
,
mrb_value
mod
)
{
mrb_value
ary
;
mrb_bool
inherit
=
TRUE;
struct
RClass
*
c
=
mrb_class_ptr
(
mod
);
mrb_get_args
(
mrb
,
"|b"
,
&
inherit
);
ary
=
mrb_ary_new
(
mrb
);
while
(
c
) {
iv_foreach
(
mrb
,
c
->
iv
,
const_i
,
&
ary
);
if
(!
inherit
)
break
;
c
=
c
->
super
;
if
(
c
==
mrb
->
object_class
)
break
;
}
return
ary
;
}
MRB_API
mrb_value
mrb_gv_get
(
mrb_state
*
mrb
,
mrb_sym
sym
)
{
mrb_value
v
;
if
(
iv_get
(
mrb
,
mrb
->
globals
,
sym
,
&
v
))
return
v
;
return
mrb_nil_value
();
}
MRB_API
void
mrb_gv_set
(
mrb_state
*
mrb
,
mrb_sym
sym
,
mrb_value
v
)
{
iv_tbl
*
t
;
if
(!
mrb
->
globals
) {
mrb
->
globals
=
iv_new
(
mrb
);
}
t
=
mrb
->
globals
;
iv_put
(
mrb
,
t
,
sym
,
v
);
}
MRB_API
void
mrb_gv_remove
(
mrb_state
*
mrb
,
mrb_sym
sym
)
{
iv_del
(
mrb
,
mrb
->
globals
,
sym
,
NULL
);
}
static
int
gv_i
(
mrb_state
*
mrb
,
mrb_sym
sym
,
mrb_value
v
,
void
*
p
)
{
mrb_value
ary
;
ary
=
*
(
mrb_value
*
)
p
;
mrb_ary_push
(
mrb
,
ary
,
mrb_symbol_value
(
sym
));
return
0
;
}
/* 15.3.1.2.4 */
/* 15.3.1.3.14 */
/*
* call-seq:
* global_variables -> array
*
* Returns an array of the names of global variables.
*
* global_variables.grep /std/ #=> [:$stdin, :$stdout, :$stderr]
*/
mrb_value
mrb_f_global_variables
(
mrb_state
*
mrb
,
mrb_value
self
)
{
iv_tbl
*
t
=
mrb
->
globals
;
mrb_value
ary
=
mrb_ary_new
(
mrb
);
size_t
i
;
char
buf
[
3
];
iv_foreach
(
mrb
,
t
,
gv_i
,
&
ary
);
buf
[
0
]
=
'$'
;
buf
[
2
]
=
0
;
for
(
i
=
1
;
i
<=
9
;
++
i
) {
buf
[
1
]
=
(
char
)(
i
+
'0'
);
mrb_ary_push
(
mrb
,
ary
,
mrb_symbol_value
(
mrb_intern
(
mrb
,
buf
,
2
)));
}
return
ary
;
}
static
mrb_bool
mrb_const_defined_0
(
mrb_state
*
mrb
,
mrb_value
mod
,
mrb_sym
id
,
mrb_bool
exclude
,
mrb_bool
recurse
)
{
struct
RClass
*
klass
=
mrb_class_ptr
(
mod
);
struct
RClass
*
tmp
;
mrb_bool
mod_retry
=
FALSE;
tmp
=
klass
;
retry
:
while
(
tmp
) {
if
(
iv_get
(
mrb
,
tmp
->
iv
,
id
,
NULL
)) {
return
TRUE;
}
if
(!
recurse
&&
(
klass
!=
mrb
->
object_class
))
break
;
tmp
=
tmp
->
super
;
}
if
(!
exclude
&&
!
mod_retry
&&
(
klass
->
tt
==
MRB_TT_MODULE
)) {
mod_retry
=
TRUE;
tmp
=
mrb
->
object_class
;
goto
retry
;
}
return
FALSE;
}
MRB_API
mrb_bool
mrb_const_defined
(
mrb_state
*
mrb
,
mrb_value
mod
,
mrb_sym
id
)
{
return
mrb_const_defined_0
(
mrb
,
mod
,
id
, TRUE, TRUE);
}
MRB_API
mrb_bool
mrb_const_defined_at
(
mrb_state
*
mrb
,
mrb_value
mod
,
mrb_sym
id
)
{
return
mrb_const_defined_0
(
mrb
,
mod
,
id
, TRUE, FALSE);
}
MRB_API
mrb_value
mrb_attr_get
(
mrb_state
*
mrb
,
mrb_value
obj
,
mrb_sym
id
)
{
return
mrb_iv_get
(
mrb
,
obj
,
id
);
}
struct
csym_arg
{
struct
RClass
*
c
;
mrb_sym
sym
;
};
static
int
csym_i
(
mrb_state
*
mrb
,
mrb_sym
sym
,
mrb_value
v
,
void
*
p
)
{
struct
csym_arg
*
a
=
(
struct
csym_arg
*
)
p
;
struct
RClass
*
c
=
a
->
c
;
if
(
mrb_type
(
v
)
==
c
->
tt
&&
mrb_class_ptr
(
v
)
==
c
) {
a
->
sym
=
sym
;
return
1
;
/* stop iteration */
View remainder of file in raw view
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