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//-----------------------------------------------------------------------------
//
// Copyright (c) 1998 - 2007, The Regents of the University of California
// Produced at the Lawrence Livermore National Laboratory
// All rights reserved.
//
// This file is part of PyCXX. For details,see http://cxx.sourceforge.net/. The
// full copyright notice is contained in the file COPYRIGHT located at the root
// of the PyCXX distribution.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// - Redistributions of source code must retain the above copyright notice,
// this list of conditions and the disclaimer below.
// - Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the disclaimer (as noted below) in the
// documentation and/or materials provided with the distribution.
// - Neither the name of the UC/LLNL nor the names of its contributors may 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 REGENTS OF THE UNIVERSITY OF
// CALIFORNIA, THE U.S. DEPARTMENT OF ENERGY 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.
//
//-----------------------------------------------------------------------------
#ifndef __CXX_ExtensionClass__h
#define __CXX_ExtensionClass__h
#define PYCXX_NOARGS_METHOD_NAME( NAME ) _callNoArgsMethod__##NAME
#define PYCXX_VARARGS_METHOD_NAME( NAME ) _callVarArgsMethod__##NAME
#define PYCXX_KEYWORDS_METHOD_NAME( NAME ) _callKeywordsMethod__##NAME
#define PYCXX_NOARGS_METHOD_DECL( CLS, NAME ) \
static PyObject *PYCXX_NOARGS_METHOD_NAME( NAME )( PyObject *_self, PyObject *, PyObject * ) \
{ \
try \
{ \
Py::PythonClassInstance *self_python = reinterpret_cast< Py::PythonClassInstance * >( _self ); \
CLS *self = reinterpret_cast< CLS * >( self_python->m_pycxx_object ); \
Py::Object r( (self->NAME)() ); \
return Py::new_reference_to( r.ptr() ); \
} \
catch( Py::Exception & ) \
{ \
return 0; \
} \
}
#define PYCXX_VARARGS_METHOD_DECL( CLS, NAME ) \
static PyObject *PYCXX_VARARGS_METHOD_NAME( NAME )( PyObject *_self, PyObject *_a, PyObject * ) \
{ \
try \
{ \
Py::PythonClassInstance *self_python = reinterpret_cast< Py::PythonClassInstance * >( _self ); \
CLS *self = reinterpret_cast< CLS * >( self_python->m_pycxx_object ); \
Py::Tuple a( _a ); \
Py::Object r( (self->NAME)( a ) ); \
return Py::new_reference_to( r.ptr() ); \
} \
catch( Py::Exception & ) \
{ \
return 0; \
} \
}
#define PYCXX_KEYWORDS_METHOD_DECL( CLS, NAME ) \
static PyObject *PYCXX_KEYWORDS_METHOD_NAME( NAME )( PyObject *_self, PyObject *_a, PyObject *_k ) \
{ \
try \
{ \
Py::PythonClassInstance *self_python = reinterpret_cast< Py::PythonClassInstance * >( _self ); \
CLS *self = reinterpret_cast< CLS * >( self_python->m_pycxx_object ); \
Py::Tuple a( _a ); \
Py::Dict k; \
if( _k != NULL ) \
k = _k; \
Py::Object r( (self->NAME)( a, k ) ); \
return Py::new_reference_to( r.ptr() ); \
} \
catch( Py::Exception & ) \
{ \
return 0; \
} \
}
// need to support METH_STATIC and METH_CLASS
#define PYCXX_ADD_NOARGS_METHOD( PYNAME, NAME, docs ) \
add_method( #PYNAME, (PyCFunction)PYCXX_NOARGS_METHOD_NAME( NAME ), METH_NOARGS, docs )
#define PYCXX_ADD_VARARGS_METHOD( PYNAME, NAME, docs ) \
add_method( #PYNAME, (PyCFunction)PYCXX_VARARGS_METHOD_NAME( NAME ), METH_VARARGS, docs )
#define PYCXX_ADD_KEYWORDS_METHOD( PYNAME, NAME, docs ) \
add_method( #PYNAME, (PyCFunction)PYCXX_KEYWORDS_METHOD_NAME( NAME ), METH_VARARGS | METH_KEYWORDS, docs )
namespace Py
{
extern PythonExtensionBase *getPythonExtensionBase( PyObject *self );
struct PythonClassInstance
{
PyObject_HEAD
PythonExtensionBase *m_pycxx_object;
};
class ExtensionClassMethodsTable
{
public:
ExtensionClassMethodsTable()
: m_methods_table( new PyMethodDef[ METHOD_TABLE_SIZE_INCREMENT ] )
, m_methods_used( 0 )
, m_methods_size( METHOD_TABLE_SIZE_INCREMENT )
{
}
~ExtensionClassMethodsTable()
{
delete[] m_methods_table;
}
// check that all methods added are unique
void check_unique_method_name( const char *_name )
{
std::string name( _name );
for( int i=0; i<m_methods_used; i++ )
{
if( name == m_methods_table[i].ml_name )
{
throw AttributeError( name );
}
}
}
PyMethodDef *add_method( const char *name, PyCFunction function, int flags, const char *doc )
{
check_unique_method_name( name );
// see if there is enough space for one more method
if( m_methods_used == (m_methods_size-1) )
{
PyMethodDef *old_mt = m_methods_table;
m_methods_size += METHOD_TABLE_SIZE_INCREMENT;
PyMethodDef *new_mt = new PyMethodDef[ m_methods_size ];
for( int i=0; i<m_methods_used; i++ )
{
new_mt[ i ] = old_mt[ i ];
}
delete[] old_mt;
m_methods_table = new_mt;
}
// add method into the table
PyMethodDef *p = &m_methods_table[ m_methods_used ];
p->ml_name = const_cast<char *>( name );
p->ml_meth = function;
p->ml_flags = flags;
p->ml_doc = const_cast<char *>( doc );
m_methods_used++;
p++;
// add the sentinel marking the table end
p->ml_name = NULL;
p->ml_meth = NULL;
p->ml_flags = 0;
p->ml_doc = NULL;
return m_methods_table;
}
private:
enum {METHOD_TABLE_SIZE_INCREMENT = 1};
PyMethodDef *m_methods_table;
int m_methods_used;
int m_methods_size;
};
template<TEMPLATE_TYPENAME T> class PythonClass
: public PythonExtensionBase
{
protected:
explicit PythonClass( PythonClassInstance *self, Tuple &args, Dict &kwds )
: PythonExtensionBase()
, m_class_instance( self )
{
}
virtual ~PythonClass()
{}
static ExtensionClassMethodsTable &methodTable()
{
static ExtensionClassMethodsTable *method_table;
if( method_table == NULL )
method_table = new ExtensionClassMethodsTable;
return *method_table;
}
static void add_method( const char *name, PyCFunction function, int flags, const char *doc=NULL )
{
behaviors().set_methods( methodTable().add_method( name, function, flags, doc ) );
}
static PythonType &behaviors()
{
static PythonType *p;
if( p == NULL )
{
#if defined( _CPPRTTI ) || defined( __GNUG__ )
const char *default_name = (typeid( T )).name();
#else
const char *default_name = "unknown";
#endif
p = new PythonType( sizeof( PythonClassInstance ), 0, default_name );
p->set_tp_new( extension_object_new );
p->set_tp_init( extension_object_init );
p->set_tp_dealloc( extension_object_deallocator );
// we are a class
p->supportClass();
// always support get and set attr
p->supportGetattro();
p->supportSetattro();
}
return *p;
}
static PyObject *extension_object_new( PyTypeObject *subtype, PyObject *args, PyObject *kwds )
{
#ifdef PYCXX_DEBUG
std::cout << "extension_object_new()" << std::endl;
#endif
PythonClassInstance *o = reinterpret_cast<PythonClassInstance *>( subtype->tp_alloc( subtype, 0 ) );
if( o == NULL )
return NULL;
o->m_pycxx_object = NULL;
PyObject *self = reinterpret_cast<PyObject *>( o );
#ifdef PYCXX_DEBUG
std::cout << "extension_object_new() => self=0x" << std::hex << reinterpret_cast< unsigned int >( self ) << std::dec << std::endl;
#endif
return self;
}
static int extension_object_init( PyObject *_self, PyObject *args_, PyObject *kwds_ )
{
try
{
Py::Tuple args( args_ );
Py::Dict kwds;
if( kwds_ != NULL )
kwds = kwds_;
PythonClassInstance *self = reinterpret_cast<PythonClassInstance *>( _self );
#ifdef PYCXX_DEBUG
std::cout << "extension_object_init( self=0x" << std::hex << reinterpret_cast< unsigned int >( self ) << std::dec << " )" << std::endl;
std::cout << " self->m_pycxx_object=0x" << std::hex << reinterpret_cast< unsigned int >( self->m_pycxx_object ) << std::dec << std::endl;
#endif
if( self->m_pycxx_object == NULL )
{
self->m_pycxx_object = new T( self, args, kwds );
#ifdef PYCXX_DEBUG
std::cout << " self->m_pycxx_object=0x" << std::hex << reinterpret_cast< unsigned int >( self->m_pycxx_object ) << std::dec << std::endl;
#endif
}
else
{
#ifdef PYCXX_DEBUG
std::cout << " reinit - self->m_pycxx_object=0x" << std::hex << reinterpret_cast< unsigned int >( self->m_pycxx_object ) << std::dec << std::endl;
#endif
self->m_pycxx_object->reinit( args, kwds );
}
}
catch( Exception & )
{
return -1;
}
return 0;
}
static void extension_object_deallocator( PyObject *_self )
{
PythonClassInstance *self = reinterpret_cast< PythonClassInstance * >( _self );
#ifdef PYCXX_DEBUG
std::cout << "extension_object_deallocator( self=0x" << std::hex << reinterpret_cast< unsigned int >( self ) << std::dec << " )" << std::endl;
std::cout << " self->m_pycxx_object=0x" << std::hex << reinterpret_cast< unsigned int >( self->m_pycxx_object ) << std::dec << std::endl;
#endif
delete self->m_pycxx_object;
_self->ob_type->tp_free( _self );
}
public:
static PyTypeObject *type_object()
{
return behaviors().type_object();
}
static Object type()
{
return Object( reinterpret_cast<PyObject *>( behaviors().type_object() ) );
}
static bool check( PyObject *p )
{
// is p like me?
return p->ob_type == type_object();
}
static bool check( const Object &ob )
{
return check( ob.ptr() );
}
virtual PyObject *selfPtr()
{
return reinterpret_cast<PyObject *>( m_class_instance );
}
virtual Object self()
{
return Object( reinterpret_cast<PyObject *>( m_class_instance ) );
}
protected:
private:
PythonClassInstance *m_class_instance;
private:
//
// prevent the compiler generating these unwanted functions
//
explicit PythonClass( const PythonClass<T> &other );
void operator=( const PythonClass<T> &rhs );
};
//
// ExtensionObject<T> is an Object that will accept only T's.
//
template<TEMPLATE_TYPENAME T>
class PythonClassObject: public Object
{
public:
explicit PythonClassObject( PyObject *pyob )
: Object( pyob )
{
validate();
}
PythonClassObject( const PythonClassObject<T> &other )
: Object( *other )
{
validate();
}
PythonClassObject( const Object &other )
: Object( *other )
{
validate();
}
PythonClassObject &operator=( const Object &rhs )
{
*this = *rhs;
return *this;
}
PythonClassObject &operator=( PyObject *rhsp )
{
if( ptr() != rhsp )
set( rhsp );
return *this;
}
virtual bool accepts( PyObject *pyob ) const
{
return( pyob && T::check( pyob ) );
}
//
// Obtain a pointer to the PythonExtension object
//
T *getCxxObject( void )
{
return dynamic_cast< T * >( getPythonExtensionBase( ptr() ) );
}
};
} // Namespace Py
// End of __CXX_ExtensionClass__h
#endif