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/*
* MessagePack for Python unpacking routine
*
* Copyright (C) 2009 Naoki INADA
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define
MSGPACK_EMBED_STACK_SIZE
(1024)
#include
"unpack_define.h"
typedef
struct
unpack_user
{
int
use_list
;
PyObject
*
object_hook
;
bool
has_pairs_hook
;
PyObject
*
list_hook
;
PyObject
*
ext_hook
;
const
char
*
encoding
;
const
char
*
unicode_errors
;
Py_ssize_t
max_str_len
,
max_bin_len
,
max_array_len
,
max_map_len
,
max_ext_len
;
}
unpack_user
;
typedef
PyObject
*
msgpack_unpack_object
;
struct
unpack_context
;
typedef
struct
unpack_context
unpack_context
;
typedef
int
(
*
execute_fn
)(
unpack_context
*
ctx
,
const
char
*
data
,
Py_ssize_t
len
,
Py_ssize_t
*
off
);
static
inline
msgpack_unpack_object
unpack_callback_root
(
unpack_user
*
u
)
{
return
NULL
;
}
static
inline
int
unpack_callback_uint16
(
unpack_user
*
u
,
uint16_t
d
,
msgpack_unpack_object
*
o
)
{
PyObject
*
p
=
PyInt_FromLong
((
long
)
d
);
if
(!
p
)
return
-1
;
*
o
=
p
;
return
0
;
}
static
inline
int
unpack_callback_uint8
(
unpack_user
*
u
,
uint8_t
d
,
msgpack_unpack_object
*
o
)
{
return
unpack_callback_uint16
(
u
,
d
,
o
);
}
static
inline
int
unpack_callback_uint32
(
unpack_user
*
u
,
uint32_t
d
,
msgpack_unpack_object
*
o
)
{
PyObject
*
p
=
PyInt_FromSize_t
((
size_t
)
d
);
if
(!
p
)
return
-1
;
*
o
=
p
;
return
0
;
}
static
inline
int
unpack_callback_uint64
(
unpack_user
*
u
,
uint64_t
d
,
msgpack_unpack_object
*
o
)
{
PyObject
*
p
;
if
(
d
>
LONG_MAX
) {
p
=
PyLong_FromUnsignedLongLong
((
unsigned
PY_LONG_LONG
)
d
);
}
else
{
p
=
PyInt_FromLong
((
long
)
d
);
}
if
(!
p
)
return
-1
;
*
o
=
p
;
return
0
;
}
static
inline
int
unpack_callback_int32
(
unpack_user
*
u
,
int32_t
d
,
msgpack_unpack_object
*
o
)
{
PyObject
*
p
=
PyInt_FromLong
(
d
);
if
(!
p
)
return
-1
;
*
o
=
p
;
return
0
;
}
static
inline
int
unpack_callback_int16
(
unpack_user
*
u
,
int16_t
d
,
msgpack_unpack_object
*
o
)
{
return
unpack_callback_int32
(
u
,
d
,
o
);
}
static
inline
int
unpack_callback_int8
(
unpack_user
*
u
,
int8_t
d
,
msgpack_unpack_object
*
o
)
{
return
unpack_callback_int32
(
u
,
d
,
o
);
}
static
inline
int
unpack_callback_int64
(
unpack_user
*
u
,
int64_t
d
,
msgpack_unpack_object
*
o
)
{
PyObject
*
p
;
if
(
d
>
LONG_MAX
||
d
<
LONG_MIN
) {
p
=
PyLong_FromLongLong
((
PY_LONG_LONG
)
d
);
}
else
{
p
=
PyInt_FromLong
((
long
)
d
);
}
*
o
=
p
;
return
0
;
}
static
inline
int
unpack_callback_double
(
unpack_user
*
u
,
double
d
,
msgpack_unpack_object
*
o
)
{
PyObject
*
p
=
PyFloat_FromDouble
(
d
);
if
(!
p
)
return
-1
;
*
o
=
p
;
return
0
;
}
static
inline
int
unpack_callback_float
(
unpack_user
*
u
,
float
d
,
msgpack_unpack_object
*
o
)
{
return
unpack_callback_double
(
u
,
d
,
o
);
}
static
inline
int
unpack_callback_nil
(
unpack_user
*
u
,
msgpack_unpack_object
*
o
)
{
Py_INCREF
(
Py_None
);
*
o
=
Py_None
;
return
0
; }
static
inline
int
unpack_callback_true
(
unpack_user
*
u
,
msgpack_unpack_object
*
o
)
{
Py_INCREF
(
Py_True
);
*
o
=
Py_True
;
return
0
; }
static
inline
int
unpack_callback_false
(
unpack_user
*
u
,
msgpack_unpack_object
*
o
)
{
Py_INCREF
(
Py_False
);
*
o
=
Py_False
;
return
0
; }
static
inline
int
unpack_callback_array
(
unpack_user
*
u
,
unsigned
int
n
,
msgpack_unpack_object
*
o
)
{
if
(
n
>
u
->
max_array_len
) {
PyErr_Format
(
PyExc_ValueError
,
"%u exceeds max_array_len(%zd)"
,
n
,
u
->
max_array_len
);
return
-1
;
}
PyObject
*
p
=
u
->
use_list
?
PyList_New
(
n
) :
PyTuple_New
(
n
);
if
(!
p
)
return
-1
;
*
o
=
p
;
return
0
;
}
static
inline
int
unpack_callback_array_item
(
unpack_user
*
u
,
unsigned
int
current
,
msgpack_unpack_object
*
c
,
msgpack_unpack_object
o
)
{
if
(
u
->
use_list
)
PyList_SET_ITEM
(
*
c
,
current
,
o
);
else
PyTuple_SET_ITEM
(
*
c
,
current
,
o
);
return
0
;
}
static
inline
int
unpack_callback_array_end
(
unpack_user
*
u
,
msgpack_unpack_object
*
c
)
{
if
(
u
->
list_hook
) {
PyObject
*
new_c
=
PyObject_CallFunctionObjArgs
(
u
->
list_hook
,
*
c
,
NULL
);
if
(!
new_c
)
return
-1
;
Py_DECREF
(
*
c
);
*
c
=
new_c
;
}
return
0
;
}
static
inline
int
unpack_callback_map
(
unpack_user
*
u
,
unsigned
int
n
,
msgpack_unpack_object
*
o
)
{
if
(
n
>
u
->
max_map_len
) {
PyErr_Format
(
PyExc_ValueError
,
"%u exceeds max_map_len(%zd)"
,
n
,
u
->
max_map_len
);
return
-1
;
}
PyObject
*
p
;
if
(
u
->
has_pairs_hook
) {
p
=
PyList_New
(
n
);
// Or use tuple?
}
else
{
p
=
PyDict_New
();
}
if
(!
p
)
return
-1
;
*
o
=
p
;
return
0
;
}
static
inline
int
unpack_callback_map_item
(
unpack_user
*
u
,
unsigned
int
current
,
msgpack_unpack_object
*
c
,
msgpack_unpack_object
k
,
msgpack_unpack_object
v
)
{
if
(
u
->
has_pairs_hook
) {
msgpack_unpack_object
item
=
PyTuple_Pack
(
2
,
k
,
v
);
if
(!
item
)
return
-1
;
Py_DECREF
(
k
);
Py_DECREF
(
v
);
PyList_SET_ITEM
(
*
c
,
current
,
item
);
return
0
;
}
else
if
(
PyDict_SetItem
(
*
c
,
k
,
v
)
==
0
) {
Py_DECREF
(
k
);
Py_DECREF
(
v
);
return
0
;
}
return
-1
;
}
static
inline
int
unpack_callback_map_end
(
unpack_user
*
u
,
msgpack_unpack_object
*
c
)
{
if
(
u
->
object_hook
) {
PyObject
*
new_c
=
PyObject_CallFunctionObjArgs
(
u
->
object_hook
,
*
c
,
NULL
);
if
(!
new_c
)
return
-1
;
Py_DECREF
(
*
c
);
*
c
=
new_c
;
}
return
0
;
}
static
inline
int
unpack_callback_raw
(
unpack_user
*
u
,
const
char
*
b
,
const
char
*
p
,
unsigned
int
l
,
msgpack_unpack_object
*
o
)
{
if
(
l
>
u
->
max_str_len
) {
PyErr_Format
(
PyExc_ValueError
,
"%u exceeds max_str_len(%zd)"
,
l
,
u
->
max_str_len
);
return
-1
;
}
PyObject
*
py
;
if
(
u
->
encoding
) {
py
=
PyUnicode_Decode
(
p
,
l
,
u
->
encoding
,
u
->
unicode_errors
);
}
else
{
py
=
PyBytes_FromStringAndSize
(
p
,
l
);
}
if
(!
py
)
return
-1
;
*
o
=
py
;
return
0
;
}
static
inline
int
unpack_callback_bin
(
unpack_user
*
u
,
const
char
*
b
,
const
char
*
p
,
unsigned
int
l
,
msgpack_unpack_object
*
o
)
{
if
(
l
>
u
->
max_bin_len
) {
PyErr_Format
(
PyExc_ValueError
,
"%u exceeds max_bin_len(%zd)"
,
l
,
u
->
max_bin_len
);
return
-1
;
}
PyObject
*
py
=
PyBytes_FromStringAndSize
(
p
,
l
);
if
(!
py
)
return
-1
;
*
o
=
py
;
return
0
;
}
static
inline
int
unpack_callback_ext
(
unpack_user
*
u
,
const
char
*
base
,
const
char
*
pos
,
unsigned
int
length
,
msgpack_unpack_object
*
o
)
{
PyObject
*
py
;
int8_t
typecode
=
(
int8_t
)
*
pos
++
;
if
(!
u
->
ext_hook
) {
PyErr_SetString
(
PyExc_AssertionError
,
"u->ext_hook cannot be NULL"
);
return
-1
;
}
if
(
length
-
1
>
u
->
max_ext_len
) {
PyErr_Format
(
PyExc_ValueError
,
"%u exceeds max_ext_len(%zd)"
,
length
,
u
->
max_ext_len
);
return
-1
;
}
// length also includes the typecode, so the actual data is length-1
#if
PY_MAJOR_VERSION
==
2
py
=
PyObject_CallFunction
(
u
->
ext_hook
,
"(is#)"
, (
int
)
typecode
,
pos
, (
Py_ssize_t
)
length
-
1
);
#else
py
=
PyObject_CallFunction
(
u
->
ext_hook
,
"(iy#)"
, (
int
)
typecode
,
pos
, (
Py_ssize_t
)
length
-
1
);
#endif
if
(!
py
)
return
-1
;
*
o
=
py
;
return
0
;
}
#include
"unpack_template.h"
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