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|
/*-----------------------------------------------------------------------------
| Copyright (c) 2013-2019, Nucleic Development Team.
|
| Distributed under the terms of the Modified BSD License.
|
| The full license is in the file LICENSE, distributed with this software.
|----------------------------------------------------------------------------*/
#include <sstream>
#include <cppy/cppy.h>
#include "symbolics.h"
#include "types.h"
#include "util.h"
namespace kiwisolver
{
namespace
{
PyObject*
Term_new( PyTypeObject* type, PyObject* args, PyObject* kwargs )
{
static const char *kwlist[] = { "variable", "coefficient", 0 };
PyObject* pyvar;
PyObject* pycoeff = 0;
if( !PyArg_ParseTupleAndKeywords(
args, kwargs, "O|O:__new__", const_cast<char**>( kwlist ),
&pyvar, &pycoeff ) )
return 0;
if( !Variable::TypeCheck( pyvar ) )
return cppy::type_error( pyvar, "Variable" );
double coefficient = 1.0;
if( pycoeff && !convert_to_double( pycoeff, coefficient ) )
return 0;
PyObject* pyterm = PyType_GenericNew( type, args, kwargs );
if( !pyterm )
return 0;
Term* self = reinterpret_cast<Term*>( pyterm );
self->variable = cppy::incref( pyvar );
self->coefficient = coefficient;
return pyterm;
}
void
Term_clear( Term* self )
{
Py_CLEAR( self->variable );
}
int
Term_traverse( Term* self, visitproc visit, void* arg )
{
Py_VISIT( self->variable );
#if PY_VERSION_HEX >= 0x03090000
// This was not needed before Python 3.9 (Python issue 35810 and 40217)
Py_VISIT(Py_TYPE(self));
#endif
return 0;
}
void
Term_dealloc( Term* self )
{
PyObject_GC_UnTrack( self );
Term_clear( self );
Py_TYPE( self )->tp_free( pyobject_cast( self ) );
}
PyObject*
Term_repr( Term* self )
{
std::stringstream stream;
stream << self->coefficient << " * ";
stream << reinterpret_cast<Variable*>( self->variable )->variable.name();
return PyUnicode_FromString( stream.str().c_str() );
}
PyObject*
Term_variable( Term* self )
{
return cppy::incref( self->variable );
}
PyObject*
Term_coefficient( Term* self )
{
return PyFloat_FromDouble( self->coefficient );
}
PyObject*
Term_value( Term* self )
{
Variable* pyvar = reinterpret_cast<Variable*>( self->variable );
return PyFloat_FromDouble( self->coefficient * pyvar->variable.value() );
}
PyObject*
Term_add( PyObject* first, PyObject* second )
{
return BinaryInvoke<BinaryAdd, Term>()( first, second );
}
PyObject*
Term_sub( PyObject* first, PyObject* second )
{
return BinaryInvoke<BinarySub, Term>()( first, second );
}
PyObject*
Term_mul( PyObject* first, PyObject* second )
{
return BinaryInvoke<BinaryMul, Term>()( first, second );
}
PyObject*
Term_div( PyObject* first, PyObject* second )
{
return BinaryInvoke<BinaryDiv, Term>()( first, second );
}
PyObject*
Term_neg( PyObject* value )
{
return UnaryInvoke<UnaryNeg, Term>()( value );
}
PyObject*
Term_richcmp( PyObject* first, PyObject* second, int op )
{
switch( op )
{
case Py_EQ:
return BinaryInvoke<CmpEQ, Term>()( first, second );
case Py_LE:
return BinaryInvoke<CmpLE, Term>()( first, second );
case Py_GE:
return BinaryInvoke<CmpGE, Term>()( first, second );
default:
break;
}
PyErr_Format(
PyExc_TypeError,
"unsupported operand type(s) for %s: "
"'%.100s' and '%.100s'",
pyop_str( op ),
Py_TYPE( first )->tp_name,
Py_TYPE( second )->tp_name
);
return 0;
}
static PyMethodDef
Term_methods[] = {
{ "variable", ( PyCFunction )Term_variable, METH_NOARGS,
"Get the variable for the term." },
{ "coefficient", ( PyCFunction )Term_coefficient, METH_NOARGS,
"Get the coefficient for the term." },
{ "value", ( PyCFunction )Term_value, METH_NOARGS,
"Get the value for the term." },
{ 0 } // sentinel
};
static PyType_Slot Term_Type_slots[] = {
{ Py_tp_dealloc, void_cast( Term_dealloc ) }, /* tp_dealloc */
{ Py_tp_traverse, void_cast( Term_traverse ) }, /* tp_traverse */
{ Py_tp_clear, void_cast( Term_clear ) }, /* tp_clear */
{ Py_tp_repr, void_cast( Term_repr ) }, /* tp_repr */
{ Py_tp_richcompare, void_cast( Term_richcmp ) }, /* tp_richcompare */
{ Py_tp_methods, void_cast( Term_methods ) }, /* tp_methods */
{ Py_tp_new, void_cast( Term_new ) }, /* tp_new */
{ Py_tp_alloc, void_cast( PyType_GenericAlloc ) }, /* tp_alloc */
{ Py_tp_free, void_cast( PyObject_GC_Del ) }, /* tp_free */
{ Py_nb_add, void_cast( Term_add ) }, /* nb_add */
{ Py_nb_subtract, void_cast( Term_sub ) }, /* nb_subatract */
{ Py_nb_multiply, void_cast( Term_mul ) }, /* nb_multiply */
{ Py_nb_negative, void_cast( Term_neg ) }, /* nb_negative */
{ Py_nb_true_divide, void_cast( Term_div ) }, /* nb_true_divide */
{ 0, 0 },
};
} // namespace
// Initialize static variables (otherwise the compiler eliminates them)
PyTypeObject* Term::TypeObject = NULL;
PyType_Spec Term::TypeObject_Spec = {
"kiwisolver.Term", /* tp_name */
sizeof( Term ), /* tp_basicsize */
0, /* tp_itemsize */
Py_TPFLAGS_DEFAULT|
Py_TPFLAGS_HAVE_GC|
Py_TPFLAGS_BASETYPE, /* tp_flags */
Term_Type_slots /* slots */
};
bool Term::Ready()
{
// The reference will be handled by the module to which we will add the type
TypeObject = pytype_cast( PyType_FromSpec( &TypeObject_Spec ) );
if( !TypeObject )
{
return false;
}
return true;
}
} // namespace kiwisolver
|
