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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;
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->strict_map_key && !PyUnicode_CheckExact(k) && !PyBytes_CheckExact(k)) {
PyErr_Format(PyExc_ValueError, "%.100s is not allowed for map key", Py_TYPE(k)->tp_name);
return -1;
}
if (PyUnicode_CheckExact(k)) {
PyUnicode_InternInPlace(&k);
}
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)
{
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)
{
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;
return 0;
}
case 12:
ts->tv_nsec = _msgpack_load32(uint32_t, buf);
ts->tv_sec = _msgpack_load64(int64_t, buf + 4);
return 0;
default:
return -1;
}
}
#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;
}
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
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(ts.tv_sec/(24*3600), 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"