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757 lines
19 KiB
757 lines
19 KiB
//---------------------------------------------------------------------------//
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// Copyright 1998 The Regents of the University of California.
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// All rights reserved. See LEGAL.LLNL for full text and disclaimer.
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//---------------------------------------------------------------------------//
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#ifndef __CXX_Extensions__h
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#define __CXX_Extensions__h
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#ifdef _MSC_VER
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// disable warning C4786: symbol greater than 255 character,
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// okay to ignore
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#pragma warning(disable: 4786)
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#endif
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#include "Config.hxx"
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#include "Objects.hxx"
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extern "C"
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{
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extern PyObject py_object_initializer;
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}
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#include <vector>
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#include <map>
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namespace Py
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{
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class ExtensionModuleBase;
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// Make an Exception Type for use in raising custom exceptions
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class ExtensionExceptionType : public Object
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{
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public:
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ExtensionExceptionType();
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virtual ~ExtensionExceptionType();
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// call init to create the type
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void init( ExtensionModuleBase &module, const std::string& name );
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};
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class MethodTable
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{
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public:
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MethodTable();
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virtual ~MethodTable();
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void add(const char* method_name, PyCFunction f, const char* doc="", int flag=1);
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PyMethodDef* table();
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protected:
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std::vector<PyMethodDef> t; // accumulator of PyMethodDef's
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PyMethodDef *mt; // Actual method table produced when full
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static PyMethodDef method (const char* method_name, PyCFunction f, int flags = 1, const char* doc="");
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private:
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//
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// prevent the compiler generating these unwanted functions
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//
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MethodTable(const MethodTable& m); //unimplemented
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void operator=(const MethodTable& m); //unimplemented
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}; // end class MethodTable
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extern "C"
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{
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typedef PyObject *(*method_varargs_call_handler_t)( PyObject *_self, PyObject *_args );
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typedef PyObject *(*method_keyword_call_handler_t)( PyObject *_self, PyObject *_args, PyObject *_dict );
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}
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template<class T>
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class MethodDefExt : public PyMethodDef
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{
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public:
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typedef Object (T::*method_varargs_function_t)( const Tuple &args );
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typedef Object (T::*method_keyword_function_t)( const Tuple &args, const Dict &kws );
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MethodDefExt
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(
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const char *_name,
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method_varargs_function_t _function,
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method_varargs_call_handler_t _handler,
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const char *_doc
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)
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{
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ext_meth_def.ml_name = const_cast<char *>(_name);
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ext_meth_def.ml_meth = _handler;
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ext_meth_def.ml_flags = METH_VARARGS;
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ext_meth_def.ml_doc = const_cast<char *>(_doc);
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ext_varargs_function = _function;
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ext_keyword_function = NULL;
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}
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MethodDefExt
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(
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const char *_name,
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method_keyword_function_t _function,
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method_keyword_call_handler_t _handler,
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const char *_doc
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)
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{
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ext_meth_def.ml_name = const_cast<char *>(_name);
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ext_meth_def.ml_meth = method_varargs_call_handler_t( _handler );
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ext_meth_def.ml_flags = METH_VARARGS|METH_KEYWORDS;
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ext_meth_def.ml_doc = const_cast<char *>(_doc);
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ext_varargs_function = NULL;
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ext_keyword_function = _function;
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}
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~MethodDefExt()
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{}
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PyMethodDef ext_meth_def;
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method_varargs_function_t ext_varargs_function;
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method_keyword_function_t ext_keyword_function;
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};
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class ExtensionModuleBase
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{
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public:
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ExtensionModuleBase( const char *name );
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virtual ~ExtensionModuleBase();
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Module module(void) const; // only valid after initialize() has been called
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Dict moduleDictionary(void) const; // only valid after initialize() has been called
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virtual Object invoke_method_keyword( const std::string &_name, const Tuple &_args, const Dict &_keywords ) = 0;
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virtual Object invoke_method_varargs( const std::string &_name, const Tuple &_args ) = 0;
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const std::string &name() const;
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const std::string &fullName() const;
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protected:
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// Initialize the module
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void initialize( const char *module_doc );
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const std::string module_name;
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const std::string full_module_name;
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MethodTable method_table;
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private:
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//
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// prevent the compiler generating these unwanted functions
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//
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ExtensionModuleBase( const ExtensionModuleBase & ); //unimplemented
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void operator=( const ExtensionModuleBase & ); //unimplemented
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};
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extern "C" PyObject *method_keyword_call_handler( PyObject *_self_and_name_tuple, PyObject *_args, PyObject *_keywords );
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extern "C" PyObject *method_varargs_call_handler( PyObject *_self_and_name_tuple, PyObject *_args );
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extern "C" void do_not_dealloc( void * );
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template<typename T>
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class ExtensionModule : public ExtensionModuleBase
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{
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public:
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ExtensionModule( const char *name )
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: ExtensionModuleBase( name )
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{}
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virtual ~ExtensionModule()
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{}
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protected:
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typedef Object (T::*method_varargs_function_t)( const Tuple &args );
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typedef Object (T::*method_keyword_function_t)( const Tuple &args, const Dict &kws );
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typedef std::map<std::string,MethodDefExt<T> *> method_map_t;
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static void add_varargs_method( const char *name, method_varargs_function_t function, const char *doc="" )
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{
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method_map_t &mm = methods();
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MethodDefExt<T> *method_definition = new MethodDefExt<T>
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(
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name,
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function,
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method_varargs_call_handler,
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doc
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);
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mm[std::string( name )] = method_definition;
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}
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static void add_keyword_method( const char *name, method_keyword_function_t function, const char *doc="" )
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{
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method_map_t &mm = methods();
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MethodDefExt<T> *method_definition = new MethodDefExt<T>
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(
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name,
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function,
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method_keyword_call_handler,
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doc
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);
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mm[std::string( name )] = method_definition;
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}
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void initialize( const char *module_doc="" )
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{
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ExtensionModuleBase::initialize( module_doc );
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Dict dict( moduleDictionary() );
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//
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// put each of the methods into the modules dictionary
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// so that we get called back at the function in T.
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//
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method_map_t &mm = methods();
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typename method_map_t::iterator i;
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for( i=mm.begin(); i != mm.end(); ++i )
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{
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MethodDefExt<T> *method_definition = (*i).second;
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static PyObject *self = PyCObject_FromVoidPtr( this, do_not_dealloc );
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Tuple args( 2 );
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args[0] = Object( self );
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args[1] = String( (*i).first );
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PyObject *func = PyCFunction_New
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(
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&method_definition->ext_meth_def,
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new_reference_to( args )
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);
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dict[ (*i).first ] = Object( func );
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}
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}
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protected: // Tom Malcolmson reports that derived classes need access to these
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static method_map_t &methods(void)
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{
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static method_map_t *map_of_methods = NULL;
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if( map_of_methods == NULL )
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map_of_methods = new method_map_t;
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return *map_of_methods;
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}
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// this invoke function must be called from within a try catch block
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virtual Object invoke_method_keyword( const std::string &name, const Tuple &args, const Dict &keywords )
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{
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method_map_t &mm = methods();
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MethodDefExt<T> *meth_def = mm[ name ];
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if( meth_def == NULL )
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{
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std::string error_msg( "CXX - cannot invoke keyword method named " );
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error_msg += name;
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throw RuntimeError( error_msg );
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}
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// cast up to the derived class
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T *self = static_cast<T *>(this);
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return (self->*meth_def->ext_keyword_function)( args, keywords );
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}
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// this invoke function must be called from within a try catch block
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virtual Object invoke_method_varargs( const std::string &name, const Tuple &args )
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{
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method_map_t &mm = methods();
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MethodDefExt<T> *meth_def = mm[ name ];
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if( meth_def == NULL )
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{
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std::string error_msg( "CXX - cannot invoke varargs method named " );
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error_msg += name;
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throw RuntimeError( error_msg );
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}
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// cast up to the derived class
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T *self = static_cast<T *>(this);
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return (self->*meth_def->ext_varargs_function)( args );
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}
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private:
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//
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// prevent the compiler generating these unwanted functions
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//
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ExtensionModule( const ExtensionModule<T> & ); //unimplemented
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void operator=( const ExtensionModule<T> & ); //unimplemented
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};
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class PythonType
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{
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public:
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// if you define one sequence method you must define
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// all of them except the assigns
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PythonType (size_t base_size, int itemsize, const char *default_name );
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virtual ~PythonType ();
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const char *getName () const;
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const char *getDoc () const;
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PyTypeObject* type_object () const;
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void name (const char* nam);
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void doc (const char* d);
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void dealloc(void (*f)(PyObject*));
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void supportPrint(void);
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void supportGetattr(void);
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void supportSetattr(void);
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void supportGetattro(void);
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void supportSetattro(void);
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void supportCompare(void);
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void supportRepr(void);
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void supportStr(void);
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void supportHash(void);
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void supportCall(void);
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void supportSequenceType(void);
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void supportMappingType(void);
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void supportNumberType(void);
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void supportBufferType(void);
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protected:
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PyTypeObject *table;
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PySequenceMethods *sequence_table;
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PyMappingMethods *mapping_table;
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PyNumberMethods *number_table;
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PyBufferProcs *buffer_table;
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void init_sequence();
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void init_mapping();
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void init_number();
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void init_buffer();
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private:
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//
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// prevent the compiler generating these unwanted functions
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//
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PythonType (const PythonType& tb); // unimplemented
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void operator=(const PythonType& t); // unimplemented
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}; // end of PythonType
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// Class PythonExtension is what you inherit from to create
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// a new Python extension type. You give your class itself
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// as the template paramter.
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// There are two ways that extension objects can get destroyed.
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// 1. Their reference count goes to zero
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// 2. Someone does an explicit delete on a pointer.
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// In (1) the problem is to get the destructor called
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// We register a special deallocator in the Python type object
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// (see behaviors()) to do this.
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// In (2) there is no problem, the dtor gets called.
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// PythonExtension does not use the usual Python heap allocator,
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// instead using new/delete. We do the setting of the type object
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// and reference count, usually done by PyObject_New, in the
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// base class ctor.
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// This special deallocator does a delete on the pointer.
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class PythonExtensionBase : public PyObject
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{
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public:
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PythonExtensionBase();
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virtual ~PythonExtensionBase();
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public:
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virtual int print( FILE *, int );
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virtual Object getattr( const char * ) = 0;
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virtual int setattr( const char *, const Object & );
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virtual Object getattro( const Object & );
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virtual int setattro( const Object &, const Object & );
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virtual int compare( const Object & );
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virtual Object repr();
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virtual Object str();
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virtual long hash();
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virtual Object call( const Object &, const Object & );
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// Sequence methods
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virtual int sequence_length();
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virtual Object sequence_concat( const Object & );
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virtual Object sequence_repeat( int );
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virtual Object sequence_item( int );
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virtual Object sequence_slice( int, int );
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virtual int sequence_ass_item( int, const Object & );
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virtual int sequence_ass_slice( int, int, const Object & );
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// Mapping
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virtual int mapping_length();
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virtual Object mapping_subscript( const Object & );
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virtual int mapping_ass_subscript( const Object &, const Object & );
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// Number
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virtual int number_nonzero();
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virtual Object number_negative();
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virtual Object number_positive();
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virtual Object number_absolute();
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virtual Object number_invert();
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virtual Object number_int();
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virtual Object number_float();
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virtual Object number_long();
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virtual Object number_oct();
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virtual Object number_hex();
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virtual Object number_add( const Object & );
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virtual Object number_subtract( const Object & );
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virtual Object number_multiply( const Object & );
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virtual Object number_divide( const Object & );
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virtual Object number_remainder( const Object & );
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virtual Object number_divmod( const Object & );
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virtual Object number_lshift( const Object & );
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virtual Object number_rshift( const Object & );
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virtual Object number_and( const Object & );
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virtual Object number_xor( const Object & );
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virtual Object number_or( const Object & );
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virtual Object number_power( const Object &, const Object & );
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// Buffer
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virtual int buffer_getreadbuffer( int, void** );
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virtual int buffer_getwritebuffer( int, void** );
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virtual int buffer_getsegcount( int* );
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private:
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void missing_method( void );
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static PyObject *method_call_handler( PyObject *self, PyObject *args );
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};
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template<typename T>
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class PythonExtension: public PythonExtensionBase
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{
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public:
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static PyTypeObject* type_object()
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{
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return behaviors().type_object();
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}
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static int check( PyObject *p )
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{
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// is p like me?
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return p->ob_type == type_object();
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}
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static int check( const Object& ob )
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{
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return check( ob.ptr());
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}
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//
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// every object needs getattr implemented
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// to support methods
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//
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virtual Object getattr( const char *name )
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{
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return getattr_methods( name );
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}
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protected:
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explicit PythonExtension()
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: PythonExtensionBase()
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{
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#ifdef PyObject_INIT
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(void)PyObject_INIT( this, type_object() );
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#else
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ob_refcnt = 1;
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ob_type = type_object();
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#endif
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// every object must support getattr
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behaviors().supportGetattr();
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}
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virtual ~PythonExtension()
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{}
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static PythonType &behaviors()
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{
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static PythonType* p;
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if( p == NULL )
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{
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#if defined( _CPPRTTI )
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const char *default_name = (typeid ( T )).name();
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#else
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const char *default_name = "unknown";
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#endif
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p = new PythonType( sizeof( T ), 0, default_name );
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p->dealloc( extension_object_deallocator );
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}
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return *p;
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}
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|
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typedef Object (T::*method_varargs_function_t)( const Tuple &args );
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typedef Object (T::*method_keyword_function_t)( const Tuple &args, const Dict &kws );
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typedef std::map<std::string,MethodDefExt<T> *> method_map_t;
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// support the default attributes, __name__, __doc__ and methods
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virtual Object getattr_default( const char *_name )
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{
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std::string name( _name );
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if( name == "__name__" && type_object()->tp_name != NULL )
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{
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return Py::String( type_object()->tp_name );
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}
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else if( name == "__doc__" && type_object()->tp_doc != NULL )
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{
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return Py::String( type_object()->tp_doc );
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}
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// trying to fake out being a class for help()
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// else if( name == "__bases__" )
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// {
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// return Py::Tuple(0);
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// }
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// else if( name == "__module__" )
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// {
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// return Py::Nothing();
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// }
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// else if( name == "__dict__" )
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// {
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// return Py::Dict();
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// }
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else
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{
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return getattr_methods( _name );
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}
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}
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// turn a name into function object
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virtual Object getattr_methods( const char *_name )
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{
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std::string name( _name );
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method_map_t &mm = methods();
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if( name == "__methods__" )
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{
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List methods;
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for( typename method_map_t::iterator i = mm.begin(); i != mm.end(); ++i )
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methods.append( String( (*i).first ) );
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return methods;
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}
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// see if name exists
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if( mm.find( name ) == mm.end() )
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throw AttributeError( "method '" + name + "' does not exist." );
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Tuple self( 2 );
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self[0] = Object( this );
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self[1] = String( name );
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MethodDefExt<T> *method_definition = mm[ name ];
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PyObject *func = PyCFunction_New( &method_definition->ext_meth_def, self.ptr() );
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return Object(func, true);
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}
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static void add_varargs_method( const char *name, method_varargs_function_t function, const char *doc="" )
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{
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method_map_t &mm = methods();
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|
|
MethodDefExt<T> *method_definition = new MethodDefExt<T>
|
|
(
|
|
name,
|
|
function,
|
|
method_varargs_call_handler,
|
|
doc
|
|
);
|
|
|
|
mm[std::string( name )] = method_definition;
|
|
}
|
|
|
|
static void add_keyword_method( const char *name, method_keyword_function_t function, const char *doc="" )
|
|
{
|
|
method_map_t &mm = methods();
|
|
|
|
MethodDefExt<T> *method_definition = new MethodDefExt<T>
|
|
(
|
|
name,
|
|
function,
|
|
method_keyword_call_handler,
|
|
doc
|
|
);
|
|
|
|
mm[std::string( name )] = method_definition;
|
|
}
|
|
|
|
private:
|
|
static method_map_t &methods(void)
|
|
{
|
|
static method_map_t *map_of_methods = NULL;
|
|
if( map_of_methods == NULL )
|
|
map_of_methods = new method_map_t;
|
|
|
|
return *map_of_methods;
|
|
}
|
|
|
|
static PyObject *method_keyword_call_handler( PyObject *_self_and_name_tuple, PyObject *_args, PyObject *_keywords )
|
|
{
|
|
try
|
|
{
|
|
Tuple self_and_name_tuple( _self_and_name_tuple );
|
|
|
|
PyObject *self_in_cobject = self_and_name_tuple[0].ptr();
|
|
T *self = static_cast<T *>( self_in_cobject );
|
|
|
|
String name( self_and_name_tuple[1] );
|
|
|
|
method_map_t &mm = methods();
|
|
MethodDefExt<T> *meth_def = mm[ name ];
|
|
if( meth_def == NULL )
|
|
return 0;
|
|
|
|
Tuple args( _args );
|
|
|
|
// _keywords may be NULL so be careful about the way the dict is created
|
|
Dict keywords;
|
|
if( _keywords != NULL )
|
|
keywords = Dict( _keywords );
|
|
|
|
Object result( (self->*meth_def->ext_keyword_function)( args, keywords ) );
|
|
|
|
return new_reference_to( result.ptr() );
|
|
}
|
|
catch( Exception & )
|
|
{
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static PyObject *method_varargs_call_handler( PyObject *_self_and_name_tuple, PyObject *_args )
|
|
{
|
|
try
|
|
{
|
|
Tuple self_and_name_tuple( _self_and_name_tuple );
|
|
|
|
PyObject *self_in_cobject = self_and_name_tuple[0].ptr();
|
|
T *self = static_cast<T *>( self_in_cobject );
|
|
|
|
String name( self_and_name_tuple[1] );
|
|
|
|
method_map_t &mm = methods();
|
|
MethodDefExt<T> *meth_def = mm[ name ];
|
|
if( meth_def == NULL )
|
|
return 0;
|
|
|
|
Tuple args( _args );
|
|
|
|
Object result;
|
|
|
|
// TMM: 7Jun'01 - Adding try & catch in case of STL debug-mode exceptions.
|
|
#ifdef _STLP_DEBUG
|
|
try
|
|
{
|
|
result = (self->*meth_def->ext_varargs_function)( args );
|
|
}
|
|
catch (std::__stl_debug_exception)
|
|
{
|
|
// throw cxx::RuntimeError( sErrMsg );
|
|
throw cxx::RuntimeError( "Error message not set yet." );
|
|
}
|
|
#else
|
|
result = (self->*meth_def->ext_varargs_function)( args );
|
|
#endif // _STLP_DEBUG
|
|
|
|
return new_reference_to( result.ptr() );
|
|
}
|
|
catch( Exception & )
|
|
{
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static void extension_object_deallocator ( PyObject* t )
|
|
{
|
|
delete (T *)( t );
|
|
}
|
|
|
|
//
|
|
// prevent the compiler generating these unwanted functions
|
|
//
|
|
explicit PythonExtension( const PythonExtension<T>& other );
|
|
void operator=( const PythonExtension<T>& rhs );
|
|
};
|
|
|
|
//
|
|
// ExtensionObject<T> is an Object that will accept only T's.
|
|
//
|
|
template<typename T>
|
|
class ExtensionObject: public Object
|
|
{
|
|
public:
|
|
|
|
explicit ExtensionObject ( PyObject *pyob )
|
|
: Object( pyob )
|
|
{
|
|
validate();
|
|
}
|
|
|
|
ExtensionObject( const ExtensionObject<T>& other )
|
|
: Object( *other )
|
|
{
|
|
validate();
|
|
}
|
|
|
|
ExtensionObject( const Object& other )
|
|
: Object( *other )
|
|
{
|
|
validate();
|
|
}
|
|
|
|
ExtensionObject& operator= ( const Object& rhs )
|
|
{
|
|
return (*this = *rhs );
|
|
}
|
|
|
|
ExtensionObject& operator= ( PyObject* rhsp )
|
|
{
|
|
if( ptr() == rhsp )
|
|
return *this;
|
|
set( rhsp );
|
|
return *this;
|
|
}
|
|
|
|
virtual bool accepts ( PyObject *pyob ) const
|
|
{
|
|
return ( pyob && T::check( pyob ));
|
|
}
|
|
|
|
//
|
|
// Obtain a pointer to the PythonExtension object
|
|
//
|
|
T *extensionObject(void)
|
|
{
|
|
return static_cast<T *>( ptr() );
|
|
}
|
|
};
|
|
|
|
} // Namespace Py
|
|
// End of CXX_Extensions.h
|
|
#endif
|