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|
/*-----------------------------------------------------------------------------
| Copyright (c) 2013-2017, Nucleic Development Team.
|
| Distributed under the terms of the Modified BSD License.
|
| The full license is in the file COPYING.txt, distributed with this software.
|----------------------------------------------------------------------------*/
#include <algorithm>
#include <sstream>
#include <Python.h>
#include <kiwi/kiwi.h>
#include "pythonhelpers.h"
#include "types.h"
#include "util.h"
using namespace PythonHelpers;
static PyObject*
Constraint_new( PyTypeObject* type, PyObject* args, PyObject* kwargs )
{
static const char *kwlist[] = { "expression", "op", "strength", 0 };
PyObject* pyexpr;
PyObject* pyop;
PyObject* pystrength = 0;
if( !PyArg_ParseTupleAndKeywords(
args, kwargs, "OO|O:__new__", const_cast<char**>( kwlist ),
&pyexpr, &pyop, &pystrength ) )
return 0;
if( !Expression::TypeCheck( pyexpr ) )
return py_expected_type_fail( pyexpr, "Expression" );
kiwi::RelationalOperator op;
if( !convert_to_relational_op( pyop, op ) )
return 0;
double strength = kiwi::strength::required;
if( pystrength && !convert_to_strength( pystrength, strength ) )
return 0;
PyObjectPtr pycn( PyType_GenericNew( type, args, kwargs ) );
if( !pycn )
return 0;
Constraint* cn = reinterpret_cast<Constraint*>( pycn.get() );
cn->expression = reduce_expression( pyexpr );
if( !cn->expression )
return 0;
kiwi::Expression expr( convert_to_kiwi_expression( cn->expression ) );
new( &cn->constraint ) kiwi::Constraint( expr, op, strength );
return pycn.release();
}
static void
Constraint_clear( Constraint* self )
{
Py_CLEAR( self->expression );
}
static int
Constraint_traverse( Constraint* self, visitproc visit, void* arg )
{
Py_VISIT( self->expression );
return 0;
}
static void
Constraint_dealloc( Constraint* self )
{
PyObject_GC_UnTrack( self );
Constraint_clear( self );
self->constraint.~Constraint();
Py_TYPE( self )->tp_free( pyobject_cast( self ) );
}
static PyObject*
Constraint_repr( Constraint* self )
{
std::stringstream stream;
Expression* expr = reinterpret_cast<Expression*>( self->expression );
Py_ssize_t size = PyTuple_GET_SIZE( expr->terms );
for( Py_ssize_t i = 0; i < size; ++i )
{
PyObject* item = PyTuple_GET_ITEM( expr->terms, i );
Term* term = reinterpret_cast<Term*>( item );
stream << term->coefficient << " * ";
stream << reinterpret_cast<Variable*>( term->variable )->variable.name();
stream << " + ";
}
stream << expr->constant;
switch( self->constraint.op() )
{
case kiwi::OP_EQ:
stream << " == 0";
break;
case kiwi::OP_LE:
stream << " <= 0";
break;
case kiwi::OP_GE:
stream << " >= 0";
break;
}
stream << " | strength = " << self->constraint.strength();
return FROM_STRING( stream.str().c_str() );
}
static PyObject*
Constraint_expression( Constraint* self )
{
return newref( self->expression );
}
static PyObject*
Constraint_op( Constraint* self )
{
PyObject* res = 0;
switch( self->constraint.op() )
{
case kiwi::OP_EQ:
res = FROM_STRING( "==" );
break;
case kiwi::OP_LE:
res = FROM_STRING( "<=" );
break;
case kiwi::OP_GE:
res = FROM_STRING( ">=" );
break;
}
return res;
}
static PyObject*
Constraint_strength( Constraint* self )
{
return PyFloat_FromDouble( self->constraint.strength() );
}
static PyObject*
Constraint_or( PyObject* pyoldcn, PyObject* value )
{
if( !Constraint::TypeCheck( pyoldcn ) )
std::swap( pyoldcn, value );
double strength;
if( !convert_to_strength( value, strength ) )
return 0;
PyObject* pynewcn = PyType_GenericNew( &Constraint_Type, 0, 0 );
if( !pynewcn )
return 0;
Constraint* oldcn = reinterpret_cast<Constraint*>( pyoldcn );
Constraint* newcn = reinterpret_cast<Constraint*>( pynewcn );
newcn->expression = newref( oldcn->expression );
new( &newcn->constraint ) kiwi::Constraint( oldcn->constraint, strength );
return pynewcn;
}
static PyMethodDef
Constraint_methods[] = {
{ "expression", ( PyCFunction )Constraint_expression, METH_NOARGS,
"Get the expression object for the constraint." },
{ "op", ( PyCFunction )Constraint_op, METH_NOARGS,
"Get the relational operator for the constraint." },
{ "strength", ( PyCFunction )Constraint_strength, METH_NOARGS,
"Get the strength for the constraint." },
{ 0 } // sentinel
};
static PyNumberMethods
Constraint_as_number = {
0, /* nb_add */
0, /* nb_subtract */
0, /* nb_multiply */
#if PY_MAJOR_VERSION < 3
0, /* nb_divide */
#endif
0, /* nb_remainder */
0, /* nb_divmod */
0, /* nb_power */
0, /* nb_negative */
0, /* nb_positive */
0, /* nb_absolute */
#if PY_MAJOR_VERSION >= 3
0, /* nb_bool */
#else
0, /* nb_nonzero */
#endif
0, /* nb_invert */
0, /* nb_lshift */
0, /* nb_rshift */
0, /* nb_and */
0, /* nb_xor */
(binaryfunc)Constraint_or, /* nb_or */
#if PY_MAJOR_VERSION < 3
0, /* nb_coerce */
#endif
0, /* nb_int */
0, /* nb_long */
0, /* nb_float */
#if PY_MAJOR_VERSION < 3
0, /* nb_oct */
0, /* nb_hex */
#endif
0, /* nb_inplace_add */
0, /* nb_inplace_subtract */
0, /* nb_inplace_multiply */
#if PY_MAJOR_VERSION < 3
0, /* nb_inplace_divide */
#endif
0, /* nb_inplace_remainder */
0, /* nb_inplace_power */
0, /* nb_inplace_lshift */
0, /* nb_inplace_rshift */
0, /* nb_inplace_and */
0, /* nb_inplace_xor */
0, /* nb_inplace_or */
(binaryfunc)0, /* nb_floor_divide */
(binaryfunc)0, /* nb_true_divide */
0, /* nb_inplace_floor_divide */
0, /* nb_inplace_true_divide */
#if PY_VERSION_HEX >= 0x02050000
(unaryfunc)0, /* nb_index */
#endif
#if PY_VERSION_HEX >= 0x03050000
(binaryfunc)0, /* nb_matrix_multiply */
(binaryfunc)0, /* nb_inplace_matrix_multiply */
#endif
};
PyTypeObject Constraint_Type = {
PyVarObject_HEAD_INIT( &PyType_Type, 0 )
"kiwisolver.Constraint", /* tp_name */
sizeof( Constraint ), /* tp_basicsize */
0, /* tp_itemsize */
(destructor)Constraint_dealloc, /* tp_dealloc */
(printfunc)0, /* tp_print */
(getattrfunc)0, /* tp_getattr */
(setattrfunc)0, /* tp_setattr */
#if PY_VERSION_HEX >= 0x03050000
( PyAsyncMethods* )0, /* tp_as_async */
#elif PY_VERSION_HEX >= 0x03000000
( void* ) 0, /* tp_reserved */
#else
( cmpfunc )0, /* tp_compare */
#endif
(reprfunc)Constraint_repr, /* tp_repr */
(PyNumberMethods*)&Constraint_as_number,/* tp_as_number */
(PySequenceMethods*)0, /* tp_as_sequence */
(PyMappingMethods*)0, /* tp_as_mapping */
(hashfunc)0, /* tp_hash */
(ternaryfunc)0, /* tp_call */
(reprfunc)0, /* tp_str */
(getattrofunc)0, /* tp_getattro */
(setattrofunc)0, /* tp_setattro */
(PyBufferProcs*)0, /* tp_as_buffer */
#if PY_MAJOR_VERSION >= 3
Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_GC|Py_TPFLAGS_BASETYPE, /* tp_flags */
#else
Py_TPFLAGS_DEFAULT|Py_TPFLAGS_HAVE_GC|Py_TPFLAGS_BASETYPE|Py_TPFLAGS_CHECKTYPES, /* tp_flags */
#endif
0, /* Documentation string */
(traverseproc)Constraint_traverse, /* tp_traverse */
(inquiry)Constraint_clear, /* tp_clear */
(richcmpfunc)0, /* tp_richcompare */
0, /* tp_weaklistoffset */
(getiterfunc)0, /* tp_iter */
(iternextfunc)0, /* tp_iternext */
(struct PyMethodDef*)Constraint_methods,/* tp_methods */
(struct PyMemberDef*)0, /* tp_members */
0, /* tp_getset */
0, /* tp_base */
0, /* tp_dict */
(descrgetfunc)0, /* tp_descr_get */
(descrsetfunc)0, /* tp_descr_set */
0, /* tp_dictoffset */
(initproc)0, /* tp_init */
(allocfunc)PyType_GenericAlloc, /* tp_alloc */
(newfunc)Constraint_new, /* tp_new */
(freefunc)PyObject_GC_Del, /* tp_free */
(inquiry)0, /* tp_is_gc */
0, /* tp_bases */
0, /* tp_mro */
0, /* tp_cache */
0, /* tp_subclasses */
0, /* tp_weaklist */
(destructor)0 /* tp_del */
};
int import_constraint()
{
return PyType_Ready( &Constraint_Type );
}
|
