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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
{
bool
use_list
;
bool
raw
;
bool
has_pairs_hook
;
bool
strict_map_key
;
int
timestamp
;
PyObject
*
object_hook
;
PyObject
*
list_hook
;
PyObject
*
ext_hook
;
PyObject
*
timestamp_t
;
PyObject
*
giga
;
PyObject
*
utc
;
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
;
//TODO: remove typedef and use PyObject* directly
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
);
/* Constructors receive a NULL output slot and store an owned reference on
* success. On failure the slot remains NULL. */
static
inline
int
unpack_callback_uint16
(
unpack_user
*
u
,
uint16_t
d
,
msgpack_unpack_object
*
o
)
{
PyObject
*
p
=
PyLong_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
=
PyLong_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
=
PyLong_FromUnsignedLongLong
((
unsigned
PY_LONG_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
=
PyLong_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
=
PyLong_FromLongLong
((
PY_LONG_LONG
)
d
);
if
(!
p
)
return
-1
;
*
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
;
}
/* Consumes o on both success and failure; borrows the container. */
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
;
}
/* Replaces the owned container reference with the hook result, or NULL on
* failure. The original reference is consumed in either case. */
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
);
Py_DECREF
(
*
c
);
*
c
=
new_c
;
if
(!
new_c
)
return
-1
;
}
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
;
}
/* Consumes k and v on both success and failure; borrows the container. */
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
->
strict_map_key
&&
!
PyUnicode_CheckExact
(
k
)
&&
!
PyBytes_CheckExact
(
k
)) {
PyErr_Format
(
PyExc_ValueError
,
"%.100s is not allowed for map key when strict_map_key=True"
,
Py_TYPE
(
k
)
->
tp_name
);
Py_DECREF
(
k
);
Py_DECREF
(
v
);
return
-1
;
}
if
(
PyUnicode_CheckExact
(
k
)) {
PyUnicode_InternInPlace
(
&
k
);
}
if
(
u
->
has_pairs_hook
) {
msgpack_unpack_object
item
=
PyTuple_Pack
(
2
,
k
,
v
);
Py_DECREF
(
k
);
Py_DECREF
(
v
);
if
(!
item
)
return
-1
;
PyList_SET_ITEM
(
*
c
,
current
,
item
);
return
0
;
}
int
ret
=
PyDict_SetItem
(
*
c
,
k
,
v
);
Py_DECREF
(
k
);
Py_DECREF
(
v
);
return
ret
;
}
/* Same ownership contract as unpack_callback_array_end. */
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
);
Py_DECREF
(
*
c
);
*
c
=
new_c
;
if
(!
new_c
)
return
-1
;
}
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
->
raw
) {
py
=
PyBytes_FromStringAndSize
(
p
,
l
);
}
else
{
py
=
PyUnicode_DecodeUTF8
(
p
,
l
,
u
->
unicode_errors
);
}
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
;
}
typedef
struct
msgpack_timestamp
{
int64_t
tv_sec
;
uint32_t
tv_nsec
;
}
msgpack_timestamp
;
/*
* Unpack ext buffer to a timestamp. Pulled from msgpack-c timestamp.h.
*/
static
int
unpack_timestamp
(
const
char
*
buf
,
unsigned
int
buflen
,
msgpack_timestamp
*
ts
) {
switch
(
buflen
) {
case
4
:
ts
->
tv_nsec
=
0
;
{
uint32_t
v
=
_msgpack_load32
(
uint32_t
,
buf
);
ts
->
tv_sec
=
(
int64_t
)
v
;
}
return
0
;
case
8
: {
uint64_t
value
=
_msgpack_load64
(
uint64_t
,
buf
);
ts
->
tv_nsec
=
(
uint32_t
)(
value
>>
34
);
ts
->
tv_sec
=
value
&
0x00000003ffffffffLL
;
break
;
}
case
12
:
ts
->
tv_nsec
=
_msgpack_load32
(
uint32_t
,
buf
);
ts
->
tv_sec
=
_msgpack_load64
(
int64_t
,
buf
+
4
);
break
;
default
:
PyErr_Format
(
PyExc_ValueError
,
"invalid timestamp data (length %u)"
,
buflen
);
return
-1
;
}
if
(
ts
->
tv_nsec
>
999999999
) {
PyErr_Format
(
PyExc_ValueError
,
"nanoseconds must be a non-negative integer not greater than 999999999."
);
return
-1
;
}
return
0
;
}
#include
"datetime.h"
static
int
unpack_callback_ext
(
unpack_user
*
u
,
const
char
*
base
,
const
char
*
pos
,
unsigned
int
length
,
msgpack_unpack_object
*
o
)
{
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
;
}
PyObject
*
py
=
NULL
;
// length also includes the typecode, so the actual data is length-1
if
(
typecode
==
-1
) {
msgpack_timestamp
ts
;
if
(
unpack_timestamp
(
pos
,
length
-
1
,
&
ts
)
<
0
) {
return
-1
;
}
if
(
u
->
timestamp
==
2
) {
// int
PyObject
*
a
=
PyLong_FromLongLong
(
ts
.
tv_sec
);
if
(
a
==
NULL
)
return
-1
;
PyObject
*
c
=
PyNumber_Multiply
(
a
,
u
->
giga
);
Py_DECREF
(
a
);
if
(
c
==
NULL
) {
return
-1
;
}
PyObject
*
b
=
PyLong_FromUnsignedLong
(
ts
.
tv_nsec
);
if
(
b
==
NULL
) {
Py_DECREF
(
c
);
return
-1
;
}
py
=
PyNumber_Add
(
c
,
b
);
Py_DECREF
(
c
);
Py_DECREF
(
b
);
}
else
if
(
u
->
timestamp
==
0
) {
// Timestamp
py
=
PyObject_CallFunction
(
u
->
timestamp_t
,
"(Lk)"
,
ts
.
tv_sec
,
ts
.
tv_nsec
);
}
else
if
(
u
->
timestamp
==
3
) {
// datetime
// Calculate datetime using epoch + delta
// due to limitations PyDateTime_FromTimestamp on Windows with negative timestamps
int64_t
days
=
ts
.
tv_sec
/ (
24
*
3600
);
if
(
days
<
INT_MIN
||
days
>
INT_MAX
) {
PyErr_Format
(
PyExc_OverflowError
,
"days=%lld; too large to convert to C int"
,
days
);
return
-1
;
}
PyObject
*
epoch
=
PyDateTimeAPI
->
DateTime_FromDateAndTime
(
1970
,
1
,
1
,
0
,
0
,
0
,
0
,
u
->
utc
,
PyDateTimeAPI
->
DateTimeType
);
if
(
epoch
==
NULL
) {
return
-1
;
}
PyObject
*
d
=
PyDelta_FromDSU
((
int
)
days
,
ts
.
tv_sec
%(
24
*
3600
),
ts
.
tv_nsec
/
1000
);
if
(
d
==
NULL
) {
Py_DECREF
(
epoch
);
return
-1
;
}
py
=
PyNumber_Add
(
epoch
,
d
);
Py_DECREF
(
epoch
);
Py_DECREF
(
d
);
}
else
{
// float
PyObject
*
a
=
PyFloat_FromDouble
((
double
)
ts
.
tv_nsec
);
if
(
a
==
NULL
)
return
-1
;
PyObject
*
b
=
PyNumber_TrueDivide
(
a
,
u
->
giga
);
Py_DECREF
(
a
);
if
(
b
==
NULL
)
return
-1
;
PyObject
*
c
=
PyLong_FromLongLong
(
ts
.
tv_sec
);
if
(
c
==
NULL
) {
Py_DECREF
(
b
);
return
-1
;
}
a
=
PyNumber_Add
(
b
,
c
);
Py_DECREF
(
b
);
Py_DECREF
(
c
);
py
=
a
;
}
}
else
{
py
=
PyObject_CallFunction
(
u
->
ext_hook
,
"(iy#)"
, (
int
)
typecode
,
pos
, (
Py_ssize_t
)
length
-
1
);
}
if
(!
py
)
return
-1
;
*
o
=
py
;
return
0
;
}
#include
"unpack_template.h"
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