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Open Source Computer Vision Library https://opencv.org/
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opencv/modules/python/src2/pycompat.hpp

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/*M///////////////////////////////////////////////////////////////////////////////////////
//
// IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
//
// By downloading, copying, installing or using the software you agree to this license.
// If you do not agree to this license, do not download, install,
// copy or use the software.
//
//
// License Agreement
// For Open Source Computer Vision Library
//
// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
// Copyright (C) 2009-2011, Willow Garage Inc., all rights reserved.
// Third party copyrights are property of their respective owners.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
// * Redistribution's of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// * Redistribution's in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// * The name of the copyright holders may not be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// This software is provided by the copyright holders and contributors "as is" and
// any express or implied warranties, including, but not limited to, the implied
// warranties of merchantability and fitness for a particular purpose are disclaimed.
// In no event shall the Intel Corporation or contributors be liable for any direct,
// indirect, incidental, special, exemplary, or consequential damages
// (including, but not limited to, procurement of substitute goods or services;
// loss of use, data, or profits; or business interruption) however caused
// and on any theory of liability, whether in contract, strict liability,
// or tort (including negligence or otherwise) arising in any way out of
// the use of this software, even if advised of the possibility of such damage.
//
//M*/
// Defines for Python 2/3 compatibility.
#ifndef __PYCOMPAT_HPP__
#define __PYCOMPAT_HPP__
#include <string>
#if PY_MAJOR_VERSION >= 3
// Python3 treats all ints as longs, PyInt_X functions have been removed.
#define PyInt_Check PyLong_Check
#define PyInt_CheckExact PyLong_CheckExact
#define PyInt_AsLong PyLong_AsLong
#define PyInt_AS_LONG PyLong_AS_LONG
#define PyInt_FromLong PyLong_FromLong
#define PyNumber_Int PyNumber_Long
#define PyString_FromString PyUnicode_FromString
#define PyString_FromStringAndSize PyUnicode_FromStringAndSize
#endif // PY_MAJOR >=3
static inline bool getUnicodeString(PyObject * obj, std::string &str)
{
bool res = false;
if (PyUnicode_Check(obj))
{
PyObject * bytes = PyUnicode_AsUTF8String(obj);
if (PyBytes_Check(bytes))
{
const char * raw = PyBytes_AsString(bytes);
if (raw)
{
str = std::string(raw);
res = true;
}
}
Py_XDECREF(bytes);
}
#if PY_MAJOR_VERSION < 3
else if (PyString_Check(obj))
{
const char * raw = PyString_AsString(obj);
if (raw)
{
str = std::string(raw);
res = true;
}
}
#endif
return res;
}
//==================================================================================================
#define CV_PY_FN_WITH_KW_(fn, flags) (PyCFunction)(void*)(PyCFunctionWithKeywords)(fn), (flags) | METH_VARARGS | METH_KEYWORDS
#define CV_PY_FN_NOARGS_(fn, flags) (PyCFunction)(fn), (flags) | METH_NOARGS
#define CV_PY_FN_WITH_KW(fn) CV_PY_FN_WITH_KW_(fn, 0)
#define CV_PY_FN_NOARGS(fn) CV_PY_FN_NOARGS_(fn, 0)
#define CV_PY_TO_CLASS(TYPE) \
template<> \
bool pyopencv_to(PyObject* dst, TYPE& src, const ArgInfo& info) \
{ \
if (!dst || dst == Py_None) \
return true; \
Ptr<TYPE> ptr; \
\
if (!pyopencv_to(dst, ptr, info)) return false; \
src = *ptr; \
return true; \
}
#define CV_PY_FROM_CLASS(TYPE) \
template<> \
PyObject* pyopencv_from(const TYPE& src) \
{ \
Ptr<TYPE> ptr(new TYPE()); \
\
*ptr = src; \
return pyopencv_from(ptr); \
}
#define CV_PY_TO_CLASS_PTR(TYPE) \
template<> \
bool pyopencv_to(PyObject* dst, TYPE*& src, const ArgInfo& info) \
{ \
if (!dst || dst == Py_None) \
return true; \
Ptr<TYPE> ptr; \
\
if (!pyopencv_to(dst, ptr, info)) return false; \
src = ptr; \
return true; \
}
#define CV_PY_FROM_CLASS_PTR(TYPE) \
static PyObject* pyopencv_from(TYPE*& src) \
{ \
return pyopencv_from(Ptr<TYPE>(src)); \
}
#define CV_PY_TO_ENUM(TYPE) \
template<> \
bool pyopencv_to(PyObject* dst, TYPE& src, const ArgInfo& info) \
{ \
if (!dst || dst == Py_None) \
return true; \
int underlying = 0; \
\
if (!pyopencv_to(dst, underlying, info)) return false; \
src = static_cast<TYPE>(underlying); \
return true; \
}
#define CV_PY_FROM_ENUM(TYPE) \
template<> \
PyObject* pyopencv_from(const TYPE& src) \
{ \
return pyopencv_from(static_cast<int>(src)); \
}
//==================================================================================================
#if PY_MAJOR_VERSION >= 3
#define CVPY_TYPE_HEAD PyVarObject_HEAD_INIT(&PyType_Type, 0)
#define CVPY_TYPE_INCREF(T) Py_INCREF(T)
#else
#define CVPY_TYPE_HEAD PyObject_HEAD_INIT(&PyType_Type) 0,
#define CVPY_TYPE_INCREF(T) _Py_INC_REFTOTAL _Py_REF_DEBUG_COMMA (T)->ob_refcnt++
#endif
#define CVPY_TYPE_DECLARE(WNAME, NAME, STORAGE, SNAME) \
struct pyopencv_##NAME##_t \
{ \
PyObject_HEAD \
STORAGE v; \
}; \
static PyTypeObject pyopencv_##NAME##_TypeXXX = \
{ \
CVPY_TYPE_HEAD \
MODULESTR"."#WNAME, \
sizeof(pyopencv_##NAME##_t), \
}; \
static PyTypeObject * pyopencv_##NAME##_TypePtr = &pyopencv_##NAME##_TypeXXX; \
static bool pyopencv_##NAME##_getp(PyObject * self, STORAGE * & dst) \
{ \
if (PyObject_TypeCheck(self, pyopencv_##NAME##_TypePtr)) \
{ \
dst = &(((pyopencv_##NAME##_t*)self)->v); \
return true; \
} \
return false; \
} \
static PyObject * pyopencv_##NAME##_Instance(const STORAGE &r) \
{ \
pyopencv_##NAME##_t *m = PyObject_NEW(pyopencv_##NAME##_t, pyopencv_##NAME##_TypePtr); \
new (&(m->v)) STORAGE(r); \
return (PyObject*)m; \
} \
static void pyopencv_##NAME##_dealloc(PyObject* self) \
{ \
((pyopencv_##NAME##_t*)self)->v.STORAGE::~SNAME(); \
PyObject_Del(self); \
} \
static PyObject* pyopencv_##NAME##_repr(PyObject* self) \
{ \
char str[1000]; \
sprintf(str, "<"#WNAME" %p>", self); \
return PyString_FromString(str); \
}
#define CVPY_TYPE_INIT_STATIC(WNAME, NAME, ERROR_HANDLER, BASE, CONSTRUCTOR) \
{ \
pyopencv_##NAME##_TypePtr->tp_base = pyopencv_##BASE##_TypePtr; \
pyopencv_##NAME##_TypePtr->tp_dealloc = pyopencv_##NAME##_dealloc; \
pyopencv_##NAME##_TypePtr->tp_repr = pyopencv_##NAME##_repr; \
pyopencv_##NAME##_TypePtr->tp_getset = pyopencv_##NAME##_getseters; \
pyopencv_##NAME##_TypePtr->tp_init = (initproc) CONSTRUCTOR; \
pyopencv_##NAME##_TypePtr->tp_methods = pyopencv_##NAME##_methods; \
pyopencv_##NAME##_TypePtr->tp_alloc = PyType_GenericAlloc; \
pyopencv_##NAME##_TypePtr->tp_new = PyType_GenericNew; \
pyopencv_##NAME##_TypePtr->tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE; \
if (PyType_Ready(pyopencv_##NAME##_TypePtr) != 0) \
{ \
ERROR_HANDLER; \
} \
CVPY_TYPE_INCREF(pyopencv_##NAME##_TypePtr); \
if (PyModule_AddObject(m, #WNAME, (PyObject *)pyopencv_##NAME##_TypePtr) < 0) \
{ \
printf("Failed to register a new type: " #WNAME ", base (" #BASE ")\n"); \
Py_DECREF(pyopencv_##NAME##_TypePtr); \
ERROR_HANDLER; \
} \
}
//==================================================================================================
#define CVPY_TYPE_DECLARE_DYNAMIC(WNAME, NAME, STORAGE, SNAME) \
struct pyopencv_##NAME##_t \
{ \
PyObject_HEAD \
STORAGE v; \
}; \
static PyObject * pyopencv_##NAME##_TypePtr = 0; \
static bool pyopencv_##NAME##_getp(PyObject * self, STORAGE * & dst) \
{ \
if (PyObject_TypeCheck(self, (PyTypeObject*)pyopencv_##NAME##_TypePtr)) \
{ \
dst = &(((pyopencv_##NAME##_t*)self)->v); \
return true; \
} \
return false; \
} \
static PyObject * pyopencv_##NAME##_Instance(const STORAGE &r) \
{ \
pyopencv_##NAME##_t *m = PyObject_New(pyopencv_##NAME##_t, (PyTypeObject*)pyopencv_##NAME##_TypePtr); \
new (&(m->v)) STORAGE(r); \
return (PyObject*)m; \
} \
static void pyopencv_##NAME##_dealloc(PyObject* self) \
{ \
((pyopencv_##NAME##_t*)self)->v.STORAGE::~SNAME(); \
PyObject_Del(self); \
} \
static PyObject* pyopencv_##NAME##_repr(PyObject* self) \
{ \
char str[1000]; \
sprintf(str, "<"#WNAME" %p>", self); \
return PyString_FromString(str); \
} \
static PyType_Slot pyopencv_##NAME##_Slots[] = \
{ \
{Py_tp_dealloc, 0}, \
{Py_tp_repr, 0}, \
{Py_tp_getset, 0}, \
{Py_tp_init, 0}, \
{Py_tp_methods, 0}, \
{Py_tp_alloc, 0}, \
{Py_tp_new, 0}, \
{0, 0} \
}; \
static PyType_Spec pyopencv_##NAME##_Spec = \
{ \
MODULESTR"."#WNAME, \
sizeof(pyopencv_##NAME##_t), \
0, \
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, \
pyopencv_##NAME##_Slots \
};
#define CVPY_TYPE_INIT_DYNAMIC(WNAME, NAME, ERROR_HANDLER, BASE, CONSTRUCTOR) \
{ \
pyopencv_##NAME##_Slots[0].pfunc /*tp_dealloc*/ = (void*)pyopencv_##NAME##_dealloc; \
pyopencv_##NAME##_Slots[1].pfunc /*tp_repr*/ = (void*)pyopencv_##NAME##_repr; \
pyopencv_##NAME##_Slots[2].pfunc /*tp_getset*/ = (void*)pyopencv_##NAME##_getseters; \
pyopencv_##NAME##_Slots[3].pfunc /*tp_init*/ = (void*) CONSTRUCTOR; \
pyopencv_##NAME##_Slots[4].pfunc /*tp_methods*/ = pyopencv_##NAME##_methods; \
pyopencv_##NAME##_Slots[5].pfunc /*tp_alloc*/ = (void*)PyType_GenericAlloc; \
pyopencv_##NAME##_Slots[6].pfunc /*tp_new*/ = (void*)PyType_GenericNew; \
PyObject * bases = 0; \
if (pyopencv_##BASE##_TypePtr) \
bases = PyTuple_Pack(1, pyopencv_##BASE##_TypePtr); \
pyopencv_##NAME##_TypePtr = PyType_FromSpecWithBases(&pyopencv_##NAME##_Spec, bases); \
if (!pyopencv_##NAME##_TypePtr) \
{ \
printf("Failed to create type from spec: " #WNAME ", base (" #BASE ")\n"); \
ERROR_HANDLER; \
} \
if (PyModule_AddObject(m, #WNAME, (PyObject *)pyopencv_##NAME##_TypePtr) < 0) \
{ \
printf("Failed to register a new type: " #WNAME ", base (" #BASE ")\n"); \
Py_DECREF(pyopencv_##NAME##_TypePtr); \
ERROR_HANDLER; \
} \
}
// Debug module load:
//
// else \
// { \
// printf("Init: " #NAME ", base (" #BASE ") -> %p" "\n", pyopencv_##NAME##_TypePtr); \
// } \
#endif // END HEADER GUARD