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#include "cast.h"
#include <util/generic/yexception.h>
#include <util/generic/buffer.h>
namespace NPyBind {
PyObject* GetTrueRef(bool incref) {
if (incref)
Py_RETURN_TRUE;
return Py_True;
}
PyObject* GetFalseRef(bool incref) {
if (incref)
Py_RETURN_FALSE;
return Py_False;
}
PyObject* BuildPyObject(int val) {
return Py_BuildValue("i", val);
}
PyObject* BuildPyObject(unsigned int val) {
return Py_BuildValue("I", val);
}
PyObject* BuildPyObject(long int val) {
return Py_BuildValue("l", val);
}
PyObject* BuildPyObject(unsigned long int val) {
return Py_BuildValue("k", val);
}
#ifdef PY_LONG_LONG
PyObject* BuildPyObject(PY_LONG_LONG val) {
return Py_BuildValue("L", val);
}
PyObject* BuildPyObject(unsigned PY_LONG_LONG val) {
return Py_BuildValue("K", val);
}
#endif
PyObject* BuildPyObject(float val) {
return Py_BuildValue("f", val);
}
PyObject* BuildPyObject(double val) {
return Py_BuildValue("d", val);
}
PyObject* BuildPyObject(const TStringBuf& val) {
if (!val.IsInited())
Py_RETURN_NONE;
PyObject* stringValue = Py_BuildValue("s#", val.data(), static_cast<int>(val.length()));
if (stringValue != nullptr) {
return stringValue;
}
if (PyErr_ExceptionMatches(PyExc_UnicodeDecodeError)) {
PyErr_Clear();
} else {
return nullptr;
}
return Py_BuildValue("y#", val.data(), static_cast<int>(val.length()));
}
PyObject* BuildPyObject(const char* val) {
if (val == nullptr)
Py_RETURN_NONE;
PyObject* stringValue = Py_BuildValue("s#", val, static_cast<int>(strlen(val)));
if (stringValue != nullptr) {
return stringValue;
}
if (PyErr_ExceptionMatches(PyExc_UnicodeDecodeError)) {
PyErr_Clear();
} else {
return nullptr;
}
return Py_BuildValue("y#", val, static_cast<int>(strlen(val)));
}
PyObject* BuildPyObject(const TWtringBuf& val) {
if (!val.IsInited())
Py_RETURN_NONE;
#if PY_VERSION_HEX < 0x03030000
TPyObjectPtr result(PyUnicode_FromUnicode(nullptr, val.size()), true);
Py_UNICODE* buf = PyUnicode_AS_UNICODE(result.Get());
if (buf == nullptr)
Py_RETURN_NONE;
for (size_t i = 0; i < val.size(); ++i) {
buf[i] = static_cast<Py_UNICODE>(val[i]);
}
#else
PyObject* unicodeValue = PyUnicode_FromKindAndData(PyUnicode_2BYTE_KIND, val.data(), val.size());
if (unicodeValue == nullptr)
Py_RETURN_NONE;
TPyObjectPtr result(unicodeValue, true);
#endif
return result.RefGet();
}
PyObject* BuildPyObject(const TBuffer& val) {
TPyObjectPtr res(PyList_New(val.size()), true);
for (size_t i = 0, size = val.Size(); i < size; ++i)
PyList_SetItem(res.Get(), i, BuildPyObject(val.Data()[i]));
return res.RefGet();
}
PyObject* BuildPyObject(bool val) {
if (val)
Py_RETURN_TRUE;
else
Py_RETURN_FALSE;
}
PyObject* BuildPyObject(PyObject* val) {
Py_XINCREF(val);
return val;
}
PyObject* BuildPyObject(TPyObjectPtr ptr) {
return ptr.RefGet();
}
/* python represents (http://docs.python.org/c-api/arg.html#Py_BuildValue)
* char, uchar, short, ushort, int, long as PyInt
* uint, ulong as PyInt or PyLong (if exceeds sys.maxint)
* longlong, ulonglong as PyLong
*/
template <>
bool FromPyObject(PyObject* obj, long& res) {
if (PyLong_Check(obj)) {
res = PyLong_AsLong(obj);
return true;
}
if (PyFloat_Check(obj)) {
res = static_cast<long>(PyFloat_AsDouble(obj));
return true;
}
#if PY_MAJOR_VERSION < 3
res = PyInt_AsLong(obj);
#endif
return -1 != res || !PyErr_Occurred();
}
template <>
bool FromPyObject(PyObject* obj, unsigned long& res) {
long lres;
if (!FromPyObject(obj, lres))
return false;
if (lres < 0)
return false;
res = static_cast<unsigned long long>(lres);
return true;
}
template <>
bool FromPyObject(PyObject* obj, int& res) {
long lres;
if (!FromPyObject(obj, lres))
return false;
res = static_cast<int>(lres);
return true;
}
template <>
bool FromPyObject(PyObject* obj, unsigned char& res) {
long lres;
if (!FromPyObject(obj, lres))
return false;
res = static_cast<unsigned char>(lres);
return true;
}
template <>
bool FromPyObject(PyObject* obj, char& res) {
long lres;
if (!FromPyObject(obj, lres))
return false;
res = static_cast<char>(lres);
return true;
}
template <>
bool FromPyObject(PyObject* obj, unsigned int& res) {
unsigned long lres;
if (!FromPyObject(obj, lres))
return false;
res = static_cast<unsigned int>(lres);
return true;
}
#ifdef HAVE_LONG_LONG
template <>
bool FromPyObject(PyObject* obj, long long& res) {
if (PyLong_Check(obj)) {
res = PyLong_AsLongLong(obj);
return -1 != res || !PyErr_Occurred();
}
long lres;
if (!FromPyObject(obj, lres))
return false;
res = static_cast<long long>(lres);
return true;
}
template <>
bool FromPyObject(PyObject* obj, unsigned long long& res) {
if (PyLong_Check(obj)) {
res = PyLong_AsUnsignedLongLong(obj);
return static_cast<unsigned long long>(-1) != res || !PyErr_Occurred();
}
long lres;
if (!FromPyObject(obj, lres))
return false;
res = static_cast<unsigned long long>(lres);
return true;
}
#endif
template <>
bool FromPyObject(PyObject* obj, double& res) {
if (PyFloat_Check(obj)) {
res = PyFloat_AsDouble(obj);
return true;
}
long long lres;
if (!FromPyObject(obj, lres))
return false;
res = static_cast<double>(lres);
return true;
}
template <>
bool FromPyObject(PyObject* obj, float& res) {
double dres;
if (!FromPyObject(obj, dres))
return false;
res = static_cast<float>(dres);
return true;
}
template <>
bool FromPyObject(PyObject* obj, bool& res) {
if (!PyBool_Check(obj))
return false;
if (obj == Py_True)
res = true;
else
res = false;
return true;
}
template <>
bool FromPyObject(PyObject* obj, PyObject*& res) {
Py_XINCREF(obj);
res = obj;
return true;
}
template <>
bool FromPyObject(PyObject* obj, TPyObjectPtr& res) {
res = TPyObjectPtr(obj);
return true;
}
static inline bool _FromPyObject(PyObject* obj, TStringBuf& res) {
char* str;
Py_ssize_t len;
#if PY_MAJOR_VERSION >= 3
if (PyUnicode_Check(obj)) {
auto buf = PyUnicode_AsUTF8AndSize(obj, &len);
res = TStringBuf(buf, len);
return true;
}
#endif
if (-1 == PyBytes_AsStringAndSize(obj, &str, &len) || 0 > len)
return false;
res = TStringBuf(str, len);
return true;
}
bool FromPyObject(PyObject* obj, TStringBuf& res) {
return _FromPyObject(obj, res);
}
bool FromPyObject(PyObject* obj, TString& res) {
TStringBuf str;
if (!_FromPyObject(obj, str))
return false;
res = str;
return true;
}
bool FromPyObject(PyObject* obj, TUtf16String& res) {
if (!PyUnicode_Check(obj))
return false;
auto str = TPyObjectPtr(PyUnicode_AsUTF16String(obj), true);
if (!str)
return false;
constexpr auto BOM_SIZE = 2;
size_t len = (static_cast<size_t>(PyBytes_GET_SIZE(str.Get())) - BOM_SIZE) / 2;
res.resize(len);
memcpy(res.begin(), PyBytes_AS_STRING(str.Get()) + BOM_SIZE, len * 2);
return (nullptr == PyErr_Occurred());
}
bool FromPyObject(PyObject* obj, TBuffer& res) {
if (!PyList_Check(obj))
return false;
size_t cnt = PyList_Size(obj);
res.Reserve(cnt);
for (size_t i = 0; i < cnt; ++i) {
PyObject* item = PyList_GET_ITEM(obj, i);
char ch = 0;
if (!FromPyObject(item, ch))
return false;
res.Append(ch);
}
return true;
}
}
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