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Copy pathObjectHolder.cc
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794 lines (658 loc) · 16.6 KB
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/***
DEVSIM
Copyright 2013 DEVSIM LLC
SPDX-License-Identifier: Apache-2.0
***/
/// Python is insisting on defined _POSIX_C_SOURCE and _X_OPEN_SOURCE
#include "Python.h"
#include "ObjectHolder.hh"
#include "dsAssert.hh"
#include "ControlGIL.hh"
#include <cassert>
#include <limits>
#include <algorithm>
ObjectHolder::ObjectHolder() : object_(nullptr)
{
}
ObjectHolder::ObjectHolder(const ObjectHolder &t) : object_(t.object_)
{
EnsurePythonGIL gil;
if (object_)
{
Py_INCREF(reinterpret_cast<PyObject *>(object_));
}
}
ObjectHolder &ObjectHolder::operator=(const ObjectHolder &t)
{
EnsurePythonGIL gil;
/// Need to stop referencing the current object
if (this != &t)
{
if (object_ != t.object_)
{
if (object_)
{
Py_DECREF(reinterpret_cast<PyObject *>(object_));
}
object_ = t.object_;
if (object_)
{
Py_INCREF(reinterpret_cast<PyObject *>(object_));
}
}
}
return *this;
}
ObjectHolder::ObjectHolder(ObjectHolder &&t) : object_(t.object_)
{
// stealing reference
t.object_ = nullptr;
}
ObjectHolder &ObjectHolder::operator=(ObjectHolder &&t)
{
std::swap(object_, t.object_);
return *this;
}
ObjectHolder::~ObjectHolder()
{
EnsurePythonGIL gil;
if (object_)
{
Py_DECREF(reinterpret_cast<PyObject *>(object_));
}
}
void ObjectHolder::clear()
{
EnsurePythonGIL gil;
if (object_)
{
Py_DECREF(reinterpret_cast<PyObject *>(object_));
}
object_ = nullptr;
}
ObjectHolder::ObjectHolder(void *t) : object_(t)
{
//// Assume the reference already had a reference count increase
#if 0
if (object_)
{
Py_INCREF(reinterpret_cast<PyObject *>(object_));
}
#endif
}
ObjectHolder::ObjectHolder(bool tval)
{
EnsurePythonGIL gil;
PyObject *obj = nullptr;
if (tval)
{
obj = Py_True;
}
else
{
obj = Py_False;
}
Py_INCREF(obj);
object_ = obj;
}
namespace {
//https://stackoverflow.com/questions/5356773/python-get-string-representation-of-pyobject
std::string GetStringFromStringObject(PyObject *obj)
{
EnsurePythonGIL gil;
std::string ret;
if (PyUnicode_CheckExact(obj))
{
PyObject *sobj = PyUnicode_AsUTF8String(obj);
ret = PyBytes_AsString(sobj);
Py_DECREF(sobj);
}
else if (PyBytes_CheckExact(obj))
{
ret = PyBytes_AsString(obj);
}
return ret;
}
}
std::string ObjectHolder::GetString() const
{
EnsurePythonGIL gil;
std::string ret;
if (object_)
{
PyObject *obj = reinterpret_cast<PyObject *>(object_);
ret = GetStringFromStringObject(obj);
if (ret.empty())
{
PyObject *strobj = PyObject_Str(obj);
ret = GetStringFromStringObject(strobj);
Py_DECREF(strobj);
}
}
return ret;
}
ObjectHolder::DoubleEntry_t ObjectHolder::GetDouble() const
{
EnsurePythonGIL gil;
bool ok = false;
double val(0.0);
if (object_)
{
PyObject *obj = reinterpret_cast<PyObject *>(object_);
if (PyFloat_CheckExact(obj))
{
ok = true;
val = PyFloat_AsDouble(obj);
}
else if (auto *fobj = PyNumber_Float(obj))
{
ok = true;
val = PyFloat_AsDouble(fobj);
Py_DECREF(fobj);
}
else
{
PyErr_Clear();
}
}
return std::make_pair(ok, val);
}
ObjectHolder::BooleanEntry_t ObjectHolder::GetBoolean() const
{
EnsurePythonGIL gil;
bool ok = false;
bool val= false;
if (object_)
{
PyObject *obj = reinterpret_cast<PyObject *>(object_);
int ret = PyObject_IsTrue(obj);
if (ret != -1)
{
ok = true;
val = (ret == 1);
}
}
return std::make_pair(ok, val);
}
ObjectHolder::IntegerEntry_t ObjectHolder::GetInteger() const
{
EnsurePythonGIL gil;
bool ok = true;
int val= 0;
ObjectHolder::LongEntry_t lent = this->GetLong();
if (lent.first)
{
ptrdiff_t ret = lent.second;
if ((ret >= INT_MIN) && (ret <= INT_MAX))
{
ok = true;
val = ret;
}
else
{
ok = false;
}
}
return std::make_pair(ok, val);
}
ObjectHolder::LongEntry_t ObjectHolder::GetLong() const
{
EnsurePythonGIL gil;
bool ok =false;
ptrdiff_t val=0;
// a long on windows 64 bit is 32 bits
if (object_)
{
PyObject *obj = reinterpret_cast<PyObject *>(object_);
if (PyLong_CheckExact(obj))
{
ok = true;
val = PyLong_AsLong(obj);
}
else if (PyUnicode_CheckExact(obj) || PyBytes_CheckExact(obj))
{
const std::string &s = this->GetString();
PyErr_Clear();
char *p;
PyObject *iobj = PyLong_FromString(const_cast<char *>(s.c_str()), &p, 10);
if (iobj)
{
if ((*p) == 0)
{
ok = true;
val = PyLong_AsLong(iobj);
}
Py_DECREF(iobj);
}
PyErr_Clear();
}
}
return std::make_pair(ok, val);
}
bool ObjectHolder::IsList() const
{
EnsurePythonGIL gil;
bool ok = false;
if (object_)
{
PyObject *obj = reinterpret_cast<PyObject *>(object_);
if (PySequence_Check(obj))
{
ok = true;
}
}
return ok;
}
bool ObjectHolder::IsCallable() const
{
EnsurePythonGIL gil;
bool ok = false;
if (object_)
{
PyObject *obj = reinterpret_cast<PyObject *>(object_);
if (PyCallable_Check(obj))
{
ok = true;
}
}
return ok;
}
bool ObjectHolder::GetListOfObjects(ObjectHolderList_t &objs) const
{
EnsurePythonGIL gil;
bool ok = false;
objs.clear();
PyObject *obj = reinterpret_cast<PyObject *>(object_);
if (obj && PySequence_Check(obj))
{
ok = true;
size_t len = PySequence_Size(obj);
objs.resize(len);
for (size_t i = 0; i < len; ++i)
{
//// this is a new reference
PyObject *lobj = PySequence_GetItem(obj, i);
//Py_INCREF(lobj);
objs[i] = ObjectHolder(lobj);
}
}
return ok;
}
namespace
{
template <typename T>
struct pod_info;
template <>
struct pod_info<std::complex<double>>
{
[[maybe_unused]] constexpr static auto pmf = nullptr;
[[maybe_unused]] constexpr static const char *ptype = "d";
};
template <>
struct pod_info<double>
{
constexpr static auto pmf = &ObjectHolder::GetDouble;
constexpr static const char *ptype = "d";
};
template <>
struct pod_info<int>
{
constexpr static auto pmf = &ObjectHolder::GetInteger;
constexpr static const char *ptype = "i";
};
#if defined(_WIN32) || (UINTPTR_MAX > UINT_MAX)
template <>
struct pod_info<ptrdiff_t>
{
constexpr static auto pmf = &ObjectHolder::GetLong;
};
#endif
template <typename T>
bool GetFromList(const ObjectHolder &oh, std::vector<T> &values)
{
bool ok = false;
values.clear();
ObjectHolderList_t objs;
ok = oh.GetListOfObjects(objs);
if (ok)
{
values.resize(objs.size());
ok = true;
dsAssert(pod_info<T>::pmf, "helper function not implemented");
for (size_t i = 0; i < objs.size(); ++i)
{
const auto &ent = (objs[i].*pod_info<T>::pmf)();
if (ent.first)
{
values[i] = ent.second;
}
else
{
values.clear();
ok = false;
break;
}
}
}
return ok;
}
void GetArrayInfo(const ObjectHolder &input, std::string &typecode, long &itemsize, ObjectHolder &bytes)
{
EnsurePythonGIL gil;
typecode.clear();
itemsize = 0;
bytes.clear();
PyObject *obj = reinterpret_cast<PyObject *>(const_cast<void *>(input.GetObject()));
if (!obj)
{
return;
}
if (PyBytes_Check(obj))
{
bytes = input;
}
else
{
ObjectHolder bytecall;
if (PyObject_HasAttrString(obj, "tobytes"))
{
bytecall = ObjectHolder(PyObject_GetAttrString(obj, "tobytes"));
// these do not exist without tobytes
if (PyObject_HasAttrString(obj, "typecode"))
{
ObjectHolder obj_typecode(PyObject_GetAttrString(obj, "typecode"));
typecode = obj_typecode.GetString();
}
if (PyObject_HasAttrString(obj, "itemsize"))
{
ObjectHolder obj_itemsize(PyObject_GetAttrString(obj, "itemsize"));
itemsize = obj_itemsize.GetLong().second;
}
}
if (bytecall.IsCallable())
{
bytes = ObjectHolder(PyObject_CallObject(reinterpret_cast<PyObject *>(bytecall.GetObject()), nullptr));
PyErr_Clear();
}
}
}
template <typename T>
void GetBytesAsVector(ObjectHolder &bytes, std::vector<T> &result)
{
EnsurePythonGIL gil;
char *data = nullptr;
Py_ssize_t length = 0;
int r = PyBytes_AsStringAndSize(reinterpret_cast<PyObject *>(bytes.GetObject()), &data, &length);
PyErr_Clear();
if ((r != -1) && length > 0)
{
const size_t n = length / sizeof(T);
result.resize(n);
std::copy_n(reinterpret_cast<T *>(data), n, result.begin());
}
}
template <typename T>
bool GetArrayFromBytes(const ObjectHolder &input, std::vector<T> &values, const std::string &expected_typecodes, long expected_itemsize)
{
EnsurePythonGIL gil;
values.clear();
ObjectHolder bytes;
std::string typecode;
long itemsize = 0;
GetArrayInfo(input, typecode, itemsize, bytes);
if (bytes.empty())
{
return false;
}
bool typecode_found = !typecode.empty() && (expected_typecodes.find(typecode) != std::string::npos);
if ((typecode.empty() && (itemsize == 0)) || ((typecode_found) && (itemsize == expected_itemsize)) || (typecode.empty() && (itemsize == expected_itemsize)))
{
GetBytesAsVector<T>(bytes, values);
}
return !values.empty();
}
template <typename T, typename U>
void convert_to_unsigned(const std::vector<T> &in, std::vector<U> &out)
{
out.resize(in.size());
for (size_t i = 0; i < in.size(); ++i)
{
out[i] = static_cast<U>(in[i]);
}
}
}
bool ObjectHolder::GetDoubleList(std::vector<double> &values) const
{
if (!GetArrayFromBytes<double>(*this, values, pod_info<double>::ptype, sizeof(double)))
{
return GetFromList<double>(*this, values);
}
return true;
}
bool ObjectHolder::GetComplexDoubleList(std::vector<std::complex<double>> &values) const
{
bool ret = GetArrayFromBytes<std::complex<double>>(*this, values, pod_info<double>::ptype, sizeof(double));
return ret;
}
bool ObjectHolder::GetIntegerList(std::vector<int> &values) const
{
#if defined(__MINGW32__) || defined(__MINGW64__) || defined(_WIN32) || (UINTPTR_MAX == UINT_MAX)
static_assert(sizeof(long) == sizeof(int), "wrong sizeof(long)");
const std::string search("iIlL");
#elif defined(__linux__) || defined(__APPLE__)
static_assert(sizeof(long) == sizeof(long long), "wrong sizeof(long)");
const std::string search("iI");
#else
#error "FIX TYPE"
#endif
if (!GetArrayFromBytes<int>(*this, values, search, sizeof(int)))
{
return GetFromList<int>(*this, values);
}
return true;
}
bool ObjectHolder::GetLongList(std::vector<ptrdiff_t> &values) const
{
#if defined(__MINGW32__) || defined(__MINGW64__) || defined(_WIN32) || (UINTPTR_MAX == UINT_MAX)
static_assert(sizeof(long) == sizeof(int), "wrong sizeof(long)");
const std::string search("qQ");
#elif defined(__linux__) || defined(__APPLE__)
static_assert(sizeof(long) == sizeof(long long), "wrong sizeof(long)");
const std::string search("lLqQ");
#else
#error "FIX TYPE"
#endif
if (!GetArrayFromBytes<ptrdiff_t>(*this, values, search, sizeof(ptrdiff_t)))
{
return GetFromList<ptrdiff_t>(*this, values);
}
return true;
}
bool ObjectHolder::GetUnsignedLongList(std::vector<size_t> &values) const
{
std::vector<ptrdiff_t> lvalues;
bool ok = this->GetLongList(lvalues);
if (ok)
{
convert_to_unsigned(lvalues, values);
}
else
{
values.clear();
}
return ok;
}
bool ObjectHolder::GetStringList(std::vector<std::string> &values) const
{
bool ok = false;
values.clear();
ObjectHolderList_t objs;
ok = GetListOfObjects(objs);
if (ok)
{
values.resize(objs.size());
ok = true;
for (size_t i = 0; i < objs.size(); ++i)
{
values[i] = objs[i].GetString();
}
}
return ok;
}
bool ObjectHolder::GetHashKeys(ObjectHolderList_t &keys) const
{
EnsurePythonGIL gil;
bool ret = false;
keys.clear();
if (object_ && PyDict_CheckExact(object_))
{
ObjectHolder key_holder(PyDict_Keys(reinterpret_cast<PyObject *>(object_)));
key_holder.GetListOfObjects(keys);
ret = true;
}
return ret;
}
bool ObjectHolder::GetHashMap(ObjectHolderMap_t &hashmap) const
{
EnsurePythonGIL gil;
bool ret = false;
hashmap.clear();
if (object_ && PyDict_CheckExact(object_))
{
ret = true;
ObjectHolder items_holder(PyDict_Items(reinterpret_cast<PyObject *>(object_)));
ObjectHolderList_t items;
items_holder.GetListOfObjects(items);
ObjectHolderList_t item;
for (size_t i = 0; i < items.size(); ++i)
{
items[i].GetListOfObjects(item);
const std::string &key = item[0].GetString();
ObjectHolder value = item[1];
hashmap[key] = value;
}
}
return ret;
}
const void *ObjectHolder::GetObject() const
{
return object_;
}
void *ObjectHolder::GetObject()
{
return object_;
}
ObjectHolder::ObjectHolder(const std::string &s)
{
EnsurePythonGIL gil;
object_ = PyUnicode_FromStringAndSize(s.c_str(), s.size());
}
ObjectHolder::ObjectHolder(const char *s)
{
EnsurePythonGIL gil;
object_ = PyUnicode_FromStringAndSize(s, strlen(s));
}
ObjectHolder::ObjectHolder(const void *s, size_t len)
{
EnsurePythonGIL gil;
object_ = PyByteArray_FromStringAndSize(static_cast<const char *>(s), len);
}
ObjectHolder::ObjectHolder(double v)
{
EnsurePythonGIL gil;
object_ = PyFloat_FromDouble(v);
}
ObjectHolder::ObjectHolder(int v)
{
EnsurePythonGIL gil;
object_ = PyLong_FromLong(v);
}
ObjectHolder::ObjectHolder(ObjectHolderList_t &list)
{
EnsurePythonGIL gil;
const size_t length = list.size();
PyObject *list_object = PyTuple_New(length);
for (size_t i = 0; i < length; ++i)
{
PyObject *ns = reinterpret_cast<PyObject *>(list[i].GetObject());
Py_INCREF(ns);
//// steals the reference
PyTuple_SetItem(list_object, i, ns);
}
object_ = list_object;
}
ObjectHolder::ObjectHolder(ObjectHolderMap_t &map)
{
EnsurePythonGIL gil;
PyObject *map_object = PyDict_New();
for (ObjectHolderMap_t::iterator it = map.begin(); it != map.end(); ++it)
{
const std::string &key = it->first;
PyObject *val = reinterpret_cast<PyObject *>((it->second).GetObject());
//// does not steal the reference
//Py_INCREF(val);
PyDict_SetItemString(map_object, key.c_str(), val);
}
//Py_INCREF(map_object);
object_ = map_object;
}
ObjectHolder CreateArrayObject(const char *s, const ObjectHolder &data_object)
{
EnsurePythonGIL gil;
ObjectHolder array_mod(PyImport_ImportModule("array"));
PyErr_Clear();
dsAssert(!array_mod.empty(), "array module not available");
ObjectHolder array_class(PyObject_GetAttrString(reinterpret_cast<PyObject *>(array_mod.GetObject()), "array"));
PyErr_Clear();
dsAssert(!array_class.empty(), "array.array not available");
dsAssert(array_class.IsCallable(), "array.array is not callable");
//https://docs.python.org/3/c-api/arg.html#c.Py_BuildValue
ObjectHolder result(PyObject_CallFunction(reinterpret_cast<PyObject *>(array_class.GetObject()), "sO", s, data_object.GetObject()));
PyErr_Clear();
dsAssert(!result.empty(), "array.array not able to create data");
return result;
}
template <typename T>
ObjectHolder CreatePODArray(const T *data, size_t length)
{
return CreateArrayObject(pod_info<T>::ptype, ObjectHolder(data, length));
}
template <typename T>
ObjectHolder CreatePODArray(const std::vector<T> &list)
{
const size_t length = list.size() * sizeof(T);
return CreatePODArray(list.data(), length);
}
template <typename T>
ObjectHolder CreateDoublePODArray(const std::vector<T> &list)
{
thread_local std::vector<double> tmp;
tmp.resize(list.size());
std::transform(list.begin(), list.end(), tmp.begin(), [](auto &x){return static_cast<double>(x);});
return CreatePODArray<double>(tmp);
}
template <>
ObjectHolder CreateDoublePODArray(const std::vector<double> &list)
{
return CreatePODArray<double>(list);
}
template <>
ObjectHolder CreateDoublePODArray(const std::vector<std::complex<double>> &list)
{
return CreatePODArray<double>(reinterpret_cast<const double *>(list.data()), sizeof(std::complex<double>) * list.size());
}
template ObjectHolder CreatePODArray(const std::vector<int> &list);
//template ObjectHolder CreateDoublePODArray(const std::vector<std::complex<double>> &list);
#ifdef DEVSIM_EXTENDED_PRECISION
#include "Float128.hh"
#include "dsMathTypes.hh"
template <>
ObjectHolder CreateDoublePODArray(const dsMath::ComplexDoubleVec_t<float128> &list)
{
thread_local std::vector<std::complex<double>> tmp;
tmp.resize(list.size());
std::transform(list.begin(), list.end(), tmp.begin(), [](auto &x){return std::complex<double>(static_cast<double>(x.real()), static_cast<double>(x.imag()));});
return CreateDoublePODArray(tmp);
}
//template ObjectHolder CreateDoublePODArray(const dsMath::ComplexDoubleVec_t<float128> &list);
#endif