pyobject_plus.inl

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/** @file
 *  @author Bram de Greve (bram@cocamware.com)
 *  @author Tom De Muer (tom@cocamware.com)
 *
 *  *** BEGIN LICENSE INFORMATION ***
 *  
 *  The contents of this file are subject to the Common Public Attribution License 
 *  Version 1.0 (the "License"); you may not use this file except in compliance with 
 *  the License. You may obtain a copy of the License at 
 *  http://lass.sourceforge.net/cpal-license. The License is based on the 
 *  Mozilla Public License Version 1.1 but Sections 14 and 15 have been added to cover 
 *  use of software over a computer network and provide for limited attribution for 
 *  the Original Developer. In addition, Exhibit A has been modified to be consistent 
 *  with Exhibit B.
 *  
 *  Software distributed under the License is distributed on an "AS IS" basis, WITHOUT 
 *  WARRANTY OF ANY KIND, either express or implied. See the License for the specific 
 *  language governing rights and limitations under the License.
 *  
 *  The Original Code is LASS - Library of Assembled Shared Sources.
 *  
 *  The Initial Developer of the Original Code is Bram de Greve and Tom De Muer.
 *  The Original Developer is the Initial Developer.
 *  
 *  All portions of the code written by the Initial Developer are:
 *  Copyright (C) 2004-2024 the Initial Developer.
 *  All Rights Reserved.
 *  
 *  Contributor(s):
 *
 *  Alternatively, the contents of this file may be used under the terms of the 
 *  GNU General Public License Version 2 or later (the GPL), in which case the 
 *  provisions of GPL are applicable instead of those above.  If you wish to allow use
 *  of your version of this file only under the terms of the GPL and not to allow 
 *  others to use your version of this file under the CPAL, indicate your decision by 
 *  deleting the provisions above and replace them with the notice and other 
 *  provisions required by the GPL License. If you do not delete the provisions above,
 *  a recipient may use your version of this file under either the CPAL or the GPL.
 *  
 *  *** END LICENSE INFORMATION ***
 */
 
namespace lass
{
namespace python
{
 
// --- impl ----------------------------------------------------------------------------------------
 
namespace impl
{
 
/** @internal
 */
template <typename T, PyCFunction dispatcher> struct FunctionTypeDispatcher
{
    static PyObject* fun(PyObject* self, PyObject* args) { return dispatcher(self,args); }
    typedef PyCFunction OverloadType;
};
/** @internal
 */
template <PyCFunction DispatcherAddress> struct FunctionTypeDispatcher<lass::python::impl::UnarySlot ,DispatcherAddress>
{
    static PyObject* fun(PyObject* iSelf)
    {
        TPyObjPtr args(PyTuple_New(0));
        return DispatcherAddress(iSelf, args.get());
    }
};
/** @internal
 */
template <PyCFunction DispatcherAddress> struct FunctionTypeDispatcher<lass::python::impl::BinarySlot ,DispatcherAddress>
{
    static PyObject* fun(PyObject* iSelf, PyObject* iOther)
    {
        TPyObjPtr args(Py_BuildValue("(O)", iOther));
        return DispatcherAddress(iSelf, args.get());
    }
};
/** @internal
 */
template <PyCFunction DispatcherAddress> struct FunctionTypeDispatcher<lass::python::impl::TernarySlot ,DispatcherAddress>
{
    static PyObject* fun(PyObject* iSelf, PyObject* iOther, PyObject* iThird)
    {
        TPyObjPtr args(Py_BuildValue("(O,O)", iOther, iThird));
        PyObject* result = DispatcherAddress(iSelf, args.get());
        if (!result && PyErr_ExceptionMatches(PyExc_TypeError) && iThird == Py_None)
        {
            // try as a binary function
            PyErr_Clear();
            TPyObjPtr args2(Py_BuildValue("(O)", iOther));
            return DispatcherAddress(iSelf, args2.get());
        }
        return result;  
    }
};
/** @internal
*/
template <PyCFunction DispatcherAddress> struct FunctionTypeDispatcher<lass::python::impl::SsizeArgSlot ,DispatcherAddress>
{
    static PyObject* fun(PyObject* iSelf, Py_ssize_t iSize) 
    {
        TPyObjPtr args(Py_BuildValue("(n)", iSize));
        return DispatcherAddress(iSelf,args.get());
    }
};
/** @internal
*/
template <PyCFunction DispatcherAddress> struct FunctionTypeDispatcher<lass::python::impl::SsizeSsizeArgSlot ,DispatcherAddress>
{
    static PyObject* fun(PyObject* iSelf, Py_ssize_t iSize, Py_ssize_t iSize2)
    {
        TPyObjPtr args(Py_BuildValue("(n,n)", iSize, iSize2));
        return DispatcherAddress(iSelf,args.get());
    }
};
/** @internal
 */
template <PyCFunction DispatcherAddress> struct FunctionTypeDispatcher<lass::python::impl::LenSlot ,DispatcherAddress>
{
    static Py_ssize_t fun(PyObject* iSelf) 
    {
        TPyObjPtr args(Py_BuildValue("()"));
        TPyObjPtr temp(DispatcherAddress(iSelf,args.get()));
        if (!temp)
            return -1;
        Py_ssize_t result;
        if (pyGetSimpleObject(temp.get(), result) != 0)
            return -1;
        return result;
    }
};
/** @internal
 */
template <PyCFunction DispatcherAddress> struct FunctionTypeDispatcher<lass::python::impl::SsizeObjArgSlot ,DispatcherAddress>
{
    static int fun(PyObject * iSelf, Py_ssize_t iSize, PyObject * iOther)
    {
        TPyObjPtr args(Py_BuildValue("(n,O)",iSize,iOther));
        TPyObjPtr temp(DispatcherAddress(iSelf,args.get()));
        return temp ? 0 : -1;
    }
};
/** @internal
 */
template <PyCFunction DispatcherAddress> struct FunctionTypeDispatcher<lass::python::impl::SsizeSsizeObjArgSlot ,DispatcherAddress>
{
    static int fun(PyObject * iSelf, Py_ssize_t iSize, Py_ssize_t iSize2, PyObject * iOther)
    {
        TPyObjPtr args(Py_BuildValue("(n,n,O)",iSize,iSize2,iOther));
        TPyObjPtr temp(DispatcherAddress(iSelf,args.get()));
        return temp ? 0 : -1;
    }
};
/** @internal
 */
template <PyCFunction DispatcherAddress> struct FunctionTypeDispatcher<lass::python::impl::ObjObjSlot ,DispatcherAddress>
{
    static int fun(PyObject * iSelf, PyObject * iOther)
    {
        TPyObjPtr args(Py_BuildValue("(O)",iOther));
        TPyObjPtr temp(DispatcherAddress(iSelf,args.get()));
        if (!temp)
            return -1;
        int result;
        if (pyGetSimpleObject(temp.get(), result) != 0)
            return -1;
        return result;
    }
};
 
/** @internal
 */
template <PyCFunction DispatcherAddress> struct FunctionTypeDispatcher<lass::python::impl::ObjObjArgSlot, DispatcherAddress>
{
    static int fun(PyObject* self, PyObject* key, PyObject* value)
    {
        // value can be NULL in case of __delitem__: del dct[x] is in fact
        // implemented by calling mp_ass_subscript with NULL as value.
        // However, we can't translate NULL back into a valid PyObject*, so
        // we'll just omit the second argument.
 
        TPyObjPtr args(value
            ? Py_BuildValue("(O,O)", key, value)
            : Py_BuildValue("(O)", key));
        TPyObjPtr temp(DispatcherAddress(self, args.get()));
        if (temp)
        {
            LASS_ASSERT(!PyErr_Occurred());
            return 0;
        }
        if (!PyErr_Occurred())
        {
            PyErr_SetString(PyExc_AssertionError, "ObjObjArgSlot: expected return value or exception.");
        }
        return -1;
    }
};
/** @internal
*/
template <PyCFunction DispatcherAddress> struct FunctionTypeDispatcher<lass::python::impl::IterSlot ,DispatcherAddress>
{
    static PyObject* fun(PyObject* iSelf)
    {
        TPyObjPtr args(PyTuple_New(0));
        return DispatcherAddress(iSelf, args.get());
    }
};
/** @internal
*/
template <PyCFunction DispatcherAddress> struct FunctionTypeDispatcher<lass::python::impl::IterNextSlot ,DispatcherAddress>
{
    static PyObject* fun(PyObject* iSelf)
    {
        TPyObjPtr args(PyTuple_New(0));
        return DispatcherAddress(iSelf, args.get());
    }
};
/** @internal
 */
template <PyCFunction DispatcherAddress> struct FunctionTypeDispatcher<lass::python::impl::ArgKwSlot ,DispatcherAddress>
{
    static PyObject* fun(PyObject* iSelf, PyObject* iArgs, PyObject* iKw)
    {
        if (iKw)
        {
            if (!PyDict_CheckExact(iKw))
            {
                PyErr_BadInternalCall();
                return 0;
            }
            if (PyDict_Size(iKw) != 0)
            {
                PyErr_SetString(PyExc_TypeError, "function takes no keyword arguments");
                return 0;
            }
        }
        return DispatcherAddress(iSelf, iArgs);
    }
};
/** @internal
 */
template <PyCFunction DispatcherAddress> struct FunctionTypeDispatcher<lass::python::impl::InquirySlot ,DispatcherAddress>
{
    static int fun(PyObject* iSelf)
    {
        TPyObjPtr args(Py_BuildValue("()"));
        TPyObjPtr temp(DispatcherAddress(iSelf,args.get()));
        if (!temp)
            return -1;
        int result;
        if (pyGetSimpleObject(temp.get(), result) != 0)
            return -1;
        return result;
    }
};
 
/////////////////////////////////////////////
 
}
}
}
 
// EOF