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Commit bb3bf699 authored by Jim Fulton's avatar Jim Fulton
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Got rid of class attributes. 

Added method hooks.
parent d864f6e4
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Inline Side-by-side
Showing with 498 additions and 198 deletions
lib/Components/ExtensionClass/ExtensionClass.c
View file @ bb3bf699
/*
$Id: ExtensionClass.c,v 1.8 1997/03/08 12:44:31 jim Exp $
$Id: ExtensionClass.c,v 1.9 1997/04/11 21:47:05 jim Exp $
Extension Class
Copyright
Copyright 1996 Digital Creations, L.C., 910 Princess Anne
......@@ -50,45 +49,11 @@
If you have questions regarding this software,
contact:
Jim Fulton, jim@digicool.com
Digital Creations L.C.
info@digicool.com
(540) 371-6909
$Log: ExtensionClass.c,v $
Revision 1.8 1997/03/08 12:44:31 jim
Moved INSTANCE_DICT macro to public interface.
Revision 1.7 1997/02/24 23:17:47 jim
Fixed bug in subclass_nonzero.
Revision 1.6 1997/02/24 15:43:57 jim
Added __version__ string.
Revision 1.5 1997/02/17 16:27:53 jim
Many changes.
Revision 1.4 1996/12/06 17:12:29 jim
Major speed enhancements for attribute lookup and calling special
methods.
Revision 1.3 1996/10/24 21:07:49 jim
Fixed bug in returning __bases__ for base classes.
Added missing PyErr_Clear() call.
Revision 1.2 1996/10/23 18:36:56 jim
Changed a bunch of single quotes to double and got rid of
some superfluous semicolns that caused warning on SGI.
Fixed bug in CCL_getattr when getting the __base__ attribute of a base
class.
Fixed a doc string.
Revision 1.1 1996/10/22 22:26:08 jim
*** empty log message ***
*/
static char ExtensionClass_module_documentation[] =
......@@ -100,7 +65,7 @@ static char ExtensionClass_module_documentation[] =
" - They provide access to unbound methods,\n"
" - They can be called to create instances.\n"
"\n"
"$Id: ExtensionClass.c,v 1.8 1997/03/08 12:44:31 jim Exp $\n"
"$Id: ExtensionClass.c,v 1.9 1997/04/11 21:47:05 jim Exp $\n"
;
#include <stdio.h>
......@@ -118,7 +83,6 @@ PyVar_Assign(PyObject **v, PyObject *e)
#define UNLESS(E) if(!(E))
#define UNLESS_ASSIGN(V,E) ASSIGN(V,E); UNLESS(V)
/* Declarations for objects of type ExtensionClass */
#include "ExtensionClass.h"
......@@ -134,15 +98,20 @@ staticforward PyExtensionClass ECType;
((O)->ob_type->ob_type == (PyTypeObject*)&ECType && \
(((PyExtensionClass*)((O)->ob_type))->class_flags & \
EXTENSIONCLASS_BINDABLE_FLAG))
#define HasMethodHook(O) \
((O)->ob_type->ob_type == (PyTypeObject*)&ECType && \
(((PyExtensionClass*)((O)->ob_type))->class_flags & \
EXTENSIONCLASS_METHODHOOK_FLAG))
static PyObject *py__add__, *py__sub__, *py__mul__, *py__div__,
*py__mod__, *py__pow__, *py__divmod__, *py__lshift__, *py__rshift__,
*py__and__, *py__or__, *py__xor__, *py__coerce__, *py__neg__,
*py__pos__, *py__abs__, *py__nonzero__, *py__inv__, *py__int__,
*py__long__, *py__float__, *py__oct__, *py__hex__,
*py__of__, *py__call__, *py__call_method__,
*py__getitem__, *py__setitem__, *py__delitem__,
*py__getslice__, *py__setslice__, *py__delslice__,
*py__concat__, *py__repeat__, *py__len__, *py__of__, *py__call__,
*py__concat__, *py__repeat__, *py__len__,
*py__getattr__, *py__setattr__, *py__delattr__,
*py__del__, *py__repr__, *py__str__, *py__class__,
*py__hash__, *py__cmp__, *py__var_size__, *py__init__, *py__getinitargs__,
......@@ -186,6 +155,7 @@ init_py_names()
INIT_PY_NAME(__len__);
INIT_PY_NAME(__of__);
INIT_PY_NAME(__call__);
INIT_PY_NAME(__call_method__);
INIT_PY_NAME(__getattr__);
INIT_PY_NAME(__setattr__);
INIT_PY_NAME(__delattr__);
......@@ -348,12 +318,54 @@ call_cmethod(CMethod *self, PyObject *inst, PyObject *args, PyObject *kw)
}
}
static char *hook_mark="C method being called through a hook.";
static PyObject *
callCMethodWithHook(CMethod *self, PyObject *inst,
PyObject *args, PyObject *kw)
{
PyObject *hook, *m;
UNLESS(m=newCMethod(AsExtensionClass(self->type),
inst, self->name, self->meth,
self->flags, hook_mark)) return NULL;
if(hook=PyObject_GetAttr(inst,py__call_method__))
{
if(CMethod_Check(hook) && ((CMethod*)hook)->meth==self->meth)
{
/* Oops, we are already calling the hook! */
Py_DECREF(hook);
return PyEval_CallObjectWithKeywords(m,args,kw);
}
if(kw)
ASSIGN(hook,PyObject_CallFunction(hook,"OOO",m,args,kw));
else
ASSIGN(hook,PyObject_CallFunction(hook,"OO",m,args));
}
else
{
PyErr_Clear();
hook=PyEval_CallObjectWithKeywords(m,args,kw);
}
Py_DECREF(m);
return hook;
}
static PyObject *
CMethod_call(CMethod *self, PyObject *args, PyObject *kw)
{
int size;
if(self->self) return call_cmethod(self,self->self,args,kw);
if(self->self)
{
if(HasMethodHook(self->self) &&
self->doc != hook_mark /* This check prevents infinite recursion */
)
return callCMethodWithHook(self,self->self,args,kw);
return call_cmethod(self,self->self,args,kw);
}
if((size=PyTuple_Size(args)) > 0)
{
......@@ -369,6 +381,10 @@ CMethod_call(CMethod *self, PyObject *args, PyObject *kw)
);
{
PyObject *rest=0;
if(HasMethodHook(first) &&
self->doc != hook_mark /* This check prevents infinite recursion */
)
return callCMethodWithHook(self,first,args,kw);
UNLESS(rest=PySequence_GetSlice(args,1,size)) return NULL;
ASSIGN(rest,call_cmethod(self,first,rest,kw));
return rest;
......@@ -527,6 +543,32 @@ PMethod_dealloc(PMethod *self)
#endif
}
static PyObject *
callMethodWithPossibleHook(PyObject *inst,
PyObject *meth, PyObject *args, PyObject *kw)
{
if(HasMethodHook(inst))
{
PyObject *hook;
if(hook=PyObject_GetAttr(inst,py__call_method__))
{
if(PMethod_Check(hook) && ((PMethod*)hook)->meth==meth)
{
/* Oops, we are already calling the hook! */
Py_DECREF(hook);
return PyEval_CallObjectWithKeywords(meth,args,kw);
}
if(kw)
ASSIGN(hook,PyObject_CallFunction(hook,"OOO",meth,args,kw));
else
ASSIGN(hook,PyObject_CallFunction(hook,"OO",meth,args));
return hook;
}
PyErr_Clear();
}
return PyEval_CallObjectWithKeywords(meth,args,kw);
}
static PyObject *
call_PMethod(PMethod *self, PyObject *inst, PyObject *args, PyObject *kw)
{
......@@ -534,7 +576,7 @@ call_PMethod(PMethod *self, PyObject *inst, PyObject *args, PyObject *kw)
a=Py_BuildValue("(O)",inst);
if(a) ASSIGN(a,PySequence_Concat(a,args));
if(a) ASSIGN(a,PyEval_CallObjectWithKeywords(self->meth,a,kw));
if(a) ASSIGN(a,callMethodWithPossibleHook(inst,self->meth,a,kw));
return a;
}
......@@ -571,12 +613,12 @@ PMethod_call(PMethod *self, PyObject *args, PyObject *kw)
Py_DECREF(r);
return NULL;
}
ASSIGN(r,PyEval_CallObjectWithKeywords(r,rest,kw));
ASSIGN(r,callMethodWithPossibleHook(first,r,rest,kw));
Py_DECREF(rest);
return r;
}
Py_DECREF(ftype);
return PyEval_CallObjectWithKeywords(self->meth,args,kw);
return callMethodWithPossibleHook(first,self->meth,args,kw);
}
Py_XDECREF(ftype);
}
......@@ -695,7 +737,7 @@ setattr_by_name(PyObject *self, PyObject *args)
{
char *name;
PyObject *v;
UNLESS(PyArg_Parse(args,"sO",&name,&v)) return NULL;
UNLESS(PyArg_ParseTuple(args,"sO",&name,&v)) return NULL;
UNLESS(-1 != self->ob_type->tp_setattr(self,name,v)) return NULL;
Py_INCREF(Py_None);
return Py_None;
......@@ -714,7 +756,7 @@ setattro_by_name(PyObject *self, PyObject *args)
{
PyObject *name;
PyObject *v;
UNLESS(PyArg_Parse(args,"OO",&name,&v)) return NULL;
UNLESS(PyArg_ParseTuple(args,"OO",&name,&v)) return NULL;
UNLESS(-1 != self->ob_type->tp_setattro(self,name,v)) return NULL;
Py_INCREF(Py_None);
return Py_None;
......@@ -763,7 +805,7 @@ setitem_by_name(PyObject *self, PyObject *args)
PyObject *key, *v;
long r;
UNLESS(PyArg_Parse(args,"OO",&key,&v)) return NULL;
UNLESS(PyArg_ParseTuple(args,"OO",&key,&v)) return NULL;
if(self->ob_type->tp_as_mapping)
r=self->ob_type->tp_as_mapping->mp_ass_subscript(self,key,v);
else
......@@ -785,7 +827,7 @@ slice_by_name(PyObject *self, PyObject *args)
{
int i1,i2;
UNLESS(PyArg_Parse(args,"ii",&i1,&i2)) return NULL;
UNLESS(PyArg_ParseTuple(args,"ii",&i1,&i2)) return NULL;
return self->ob_type->tp_as_sequence->sq_slice(self,i1,i2);
}
......@@ -796,7 +838,7 @@ ass_slice_by_name(PyObject *self, PyObject *args)
PyObject *v;
long r;
UNLESS(PyArg_Parse(args,"iiO",&i1,&i2,&v)) return NULL;
UNLESS(PyArg_ParseTuple(args,"iiO",&i1,&i2,&v)) return NULL;
r=self->ob_type->tp_as_sequence->sq_ass_slice(self,i1,i2,v);
if(r<0) return NULL;
Py_INCREF(Py_None);
......@@ -914,9 +956,9 @@ getBaseDictionary(PyExtensionClass *type)
FILLENTRY(type->tp, call, call, 2, "call as a function");
FILLENTRY(type->tp, compare, comp, 0, "compare with another object");
FILLENTRY(type->tp, getattr, getattr, 0, "Get an attribute");
FILLENTRY(type->tp, setattr, setattr, 0, "Set an attribute");
FILLENTRY(type->tp, setattr, setattr, 1, "Set an attribute");
FILLENTRY(type->tp, getattro, getattr, 0, "Get an attribute");
FILLENTRY(type->tp, setattro, setattr, 0, "Set an attribute");
FILLENTRY(type->tp, setattro, setattr, 1, "Set an attribute");
if(sm=type->tp_as_sequence)
{
......@@ -926,9 +968,9 @@ getBaseDictionary(PyExtensionClass *type)
FILLENTRY(sm->sq, repeat, repeat, 0,
"Get a new object that is the object repeated.");
FILLENTRY(sm->sq, item, getitem, 0, "Get an item");
FILLENTRY(sm->sq, slice, getslice, 0, "Get a slice");
FILLENTRY(sm->sq, ass_item, setitem, 0, "Assign an item");
FILLENTRY(sm->sq, ass_slice, setslice, 0, "Assign a slice");
FILLENTRY(sm->sq, slice, getslice, 1, "Get a slice");
FILLENTRY(sm->sq, ass_item, setitem, 1, "Assign an item");
FILLENTRY(sm->sq, ass_slice, setslice, 1, "Assign a slice");
}
if(mm=type->tp_as_mapping)
......@@ -1025,24 +1067,33 @@ err:
}
static PyObject *
inheritedAttribute(PyExtensionClass *self, PyObject *name)
inheritedAttribute(PyObject *self, PyObject *args)
{
UNLESS(name) return PyErr_Format(PyExc_TypeError,
"expected one argument, and none given",
NULL);
return CCL_getattr(self,name,1);
}
PyObject *cls, *name;
static PyObject *
inheritedClassAttribute(PyExtensionClass *self, PyObject *name)
{
UNLESS(name) return PyErr_Format(PyExc_TypeError,
"expected one argument, and none given",
NULL);
UNLESS(name=PySequence_Concat(pyclass_,name)) return NULL;
UNLESS_ASSIGN(name,CCL_getattr(self,name,1)) return NULL;
if(UnboundPMethod_Check(name))
ASSIGN(name,bindPMethod((PMethod*)name,(PyObject*)self));
UNLESS(PyArg_ParseTuple(args,"OO",&cls,&name));
UNLESS(ExtensionClass_Check(cls))
{
PyErr_SetString(PyExc_TypeError,
"inheritedAttribute must be called with an extension "
"class first argument");
return NULL;
}
UNLESS(PyString_Check(name))
{
PyErr_SetString(PyExc_TypeError,
"inheritedAttribute must be called with a "
"string second argument");
return NULL;
}
UNLESS(name=CCL_getattr(AsExtensionClass(cls),name,1)) return NULL;
/* We got something from our class, maybe its an unbound method. */
if(UnboundCMethod_Check(name))
ASSIGN(name,(PyObject*)bindCMethod((CMethod*)name,self));
else if(UnboundPMethod_Check(name))
ASSIGN(name,bindPMethod((PMethod*)name,self));
return name;
}
......@@ -1050,6 +1101,21 @@ struct PyMethodDef ECI_methods[] = {
{"__reduce__",(PyCFunction)EC_reduce,0,
"__reduce__() -- Reduce an instance into it's class and creation data"
},
{"inheritedAttribute",(PyCFunction)inheritedAttribute,1,
"inheritedAttribute(class,name) -- Get an inherited attribute\n\n"
"Get an attribute that would be inherited if the given (extension)\n"
"class did not define it. This method is used when overriding\n"
"inherited methods. It provides 2 advantages over accessing\n"
"\n"
"attributes directly through a superclass:\n"
"\n"
"1. The superclass need not be known,\n"
"\n"
"2. The superclass may be a Python class. Without this method, it would\n"
" be possible to override methods inherited from python classes because\n"
" unbound methods gotten from Python classes cannot be called with \n"
" extension class instances. \n"
},
{NULL, NULL} /* sentinel */
};
......@@ -1165,7 +1231,7 @@ ExtensionClass_FindInstanceAttribute(PyObject *inst, PyObject *oname,
Py_INCREF(self);
return (PyObject*)self;
}
if(self->bases && *n=='d' && strcmp(n,"dict__")==0)
if(ClassHasInstDict(self) && *n=='d' && strcmp(n,"dict__")==0)
{
r = INSTANCE_DICT(inst);
Py_INCREF(r);
......@@ -1173,7 +1239,7 @@ ExtensionClass_FindInstanceAttribute(PyObject *inst, PyObject *oname,
}
}
if(self->bases)
if(ClassHasInstDict(self))
{
r= INSTANCE_DICT(inst);
if((r = PyObject_GetItem(r,oname)) && NeedsToBeBound(r))
......@@ -1278,6 +1344,15 @@ CCL_reduce(PyExtensionClass *self, PyObject *args)
return PyString_FromString(self->tp_name);
}
static PyObject *
obsolete_inheritedAttribute(PyExtensionClass *self, PyObject *name)
{
UNLESS(name) return PyErr_Format(PyExc_TypeError,
"expected one argument, and none given",
NULL);
return CCL_getattr(self,name,1);
}
PyObject *
CCL_getattro(PyExtensionClass *self, PyObject *name)
{
......@@ -1330,18 +1405,10 @@ CCL_getattro(PyExtensionClass *self, PyObject *name)
if(strcmp(nm,"inheritedAttribute")==0)
{
return newCMethod(self,(PyObject*)self,
"inheritedAttribute",(PyCFunction)inheritedAttribute,0,
"inheritedAttribute",
(PyCFunction)obsolete_inheritedAttribute,0,
"look up an attribute in a class's super classes");
}
if(nm && *nm++=='c' && *nm++=='l' && *nm++=='a' && *nm++=='s' && *nm++=='s'
&& *nm=='_')
{
UNLESS(r=CCL_getattr(self,name,0)) return NULL;
if(UnboundPMethod_Check(r))
ASSIGN(r,bindPMethod((PMethod*)r,(PyObject*)self));
return r;
}
if(r=CCL_getattr(self,name,0)) return r;
......@@ -1532,10 +1599,9 @@ CCL_call(PyExtensionClass *self, PyObject *arg, PyObject *kw)
}
Py_INCREF(self);
if(self->bases)
{
UNLESS(INSTANCE_DICT(inst)=PyDict_New()) goto err;
}
if(ClassHasInstDict(self))
UNLESS(INSTANCE_DICT(inst)=PyDict_New()) goto err;
if(init=CCL_getattr(self,py__init__,0))
{
......@@ -2637,7 +2703,7 @@ subclass__init__(PyExtensionClass *self, PyObject *args)
char *name, *p;
int dynamic=1, l;
UNLESS(PyArg_Parse(args,"(sOO)", &name, &bases, &methods)) return NULL;
UNLESS(PyArg_ParseTuple(args,"sOO", &name, &bases, &methods)) return NULL;
l=strlen(name)+1;
UNLESS(p=(char*)malloc(l*sizeof(char))) return PyErr_NoMemory();
memcpy(p,name,l);
......@@ -2661,7 +2727,6 @@ subclass__init__(PyExtensionClass *self, PyObject *args)
UNLESS(type=(PyExtensionClass *)datafull_baseclass(self))
UNLESS(type=(PyExtensionClass *)extension_baseclass(self)) return NULL;
self->tp_name=name;
UNLESS(self->class_dictionary=CopyMethods(type,methods)) return NULL;
......@@ -2696,6 +2761,12 @@ subclass__init__(PyExtensionClass *self, PyObject *args)
if(subclass_hasattr(self,py__of__))
self->class_flags |= EXTENSIONCLASS_BINDABLE_FLAG;
if(subclass_hasattr(self,py__call_method__))
self->class_flags |= EXTENSIONCLASS_METHODHOOK_FLAG;
UNLESS(self->class_flags & EXTENSIONCLASS_NOINSTDICT_FLAG)
self->class_flags |= EXTENSIONCLASS_INSTDICT_FLAG;
if(dynamic || has_number_methods(self))
{
self->tp_as_number=(PyNumberMethods*)malloc(sizeof(PyNumberMethods));
......@@ -2727,9 +2798,11 @@ subclass__init__(PyExtensionClass *self, PyObject *args)
self->tp_doc=0;
/* Check for and use __class_init__ */
if(class_init=PyObject_GetAttrString(AsPyObject(self),"class__init__"))
if(class_init=PyObject_GetAttrString(AsPyObject(self),"__class_init__"))
{
UNLESS_ASSIGN(class_init,PyObject_CallObject(class_init,NULL))
UNLESS_ASSIGN(class_init,PyObject_GetAttrString(class_init,"im_func"))
return NULL;
UNLESS_ASSIGN(class_init,PyObject_CallFunction(class_init,"O",self))
return NULL;
Py_DECREF(class_init);
}
......@@ -2741,7 +2814,7 @@ subclass__init__(PyExtensionClass *self, PyObject *args)
}
struct PyMethodDef ExtensionClass_methods[] = {
{"__init__",(PyCFunction)subclass__init__,0,""},
{"__init__",(PyCFunction)subclass__init__,1,""},
{NULL, NULL} /* sentinel */
};
......@@ -2802,7 +2875,7 @@ void
initExtensionClass()
{
PyObject *m, *d;
char *rev="$Revision: 1.8 $";
char *rev="$Revision: 1.9 $";
PURE_MIXIN_CLASS(Base, "Minimalbase class for Extension Classes", NULL);
PMethodType.ob_type=&PyType_Type;
......@@ -2836,3 +2909,43 @@ initExtensionClass()
CHECK_FOR_ERRORS("can't initialize module ExtensionClass");
}
/****************************************************************************
$Log: ExtensionClass.c,v $
Revision 1.9 1997/04/11 21:47:05 jim
Got rid of class attributes.
Added method hooks.
Revision 1.8 1997/03/08 12:44:31 jim
Moved INSTANCE_DICT macro to public interface.
Revision 1.7 1997/02/24 23:17:47 jim
Fixed bug in subclass_nonzero.
Revision 1.6 1997/02/24 15:43:57 jim
Added __version__ string.
Revision 1.5 1997/02/17 16:27:53 jim
Many changes.
Revision 1.4 1996/12/06 17:12:29 jim
Major speed enhancements for attribute lookup and calling special
methods.
Revision 1.3 1996/10/24 21:07:49 jim
Fixed bug in returning __bases__ for base classes.
Added missing PyErr_Clear() call.
Revision 1.2 1996/10/23 18:36:56 jim
Changed a bunch of single quotes to double and got rid of
some superfluous semicolns that caused warning on SGI.
Fixed bug in CCL_getattr when getting the __base__ attribute of a base
class.
Fixed a doc string.
Revision 1.1 1996/10/22 22:26:08 jim
*** empty log message ***
****************************************************************************/
lib/Components/ExtensionClass/ExtensionClass.h
View file @ bb3bf699
/*
$Id: ExtensionClass.h,v 1.5 1997/03/08 12:44:13 jim Exp $
$Id: ExtensionClass.h,v 1.6 1997/04/11 21:47:51 jim Exp $
Extension Class Definitions
......@@ -113,6 +113,10 @@
$Log: ExtensionClass.h,v $
Revision 1.6 1997/04/11 21:47:51 jim
Got rid of class attributes.
Added method hooks.
Revision 1.5 1997/03/08 12:44:13 jim
Moved INSTANCE_DICT macro to public interface.
......@@ -188,13 +192,33 @@ typedef struct {
*/
PyMethodChain methods;
/* You may set certain flags here. Only two flags are
defined at this point, the first of which is not currently
used.
*/
/* You may set certain flags here. */
long class_flags;
#define EXTENSIONCLASS_DYNAMIC_FLAG 1
#define EXTENSIONCLASS_BINDABLE_FLAG 2
/* The following flags are used by ExtensionClass */
#define EXTENSIONCLASS_DYNAMIC_FLAG 1 << 0
#define EXTENSIONCLASS_BINDABLE_FLAG 1 << 2
#define EXTENSIONCLASS_METHODHOOK_FLAG 1 << 3
#define EXTENSIONCLASS_INSTDICT_FLAG 1 << 4
#define EXTENSIONCLASS_NOINSTDICT_FLAG 1 << 5
/* The following flags are for use by extension class developers. */
#define EXTENSIONCLASS_USER_FLAG1 1 << 16
#define EXTENSIONCLASS_USER_FLAG2 1 << 17
#define EXTENSIONCLASS_USER_FLAG3 1 << 18
#define EXTENSIONCLASS_USER_FLAG4 1 << 19
#define EXTENSIONCLASS_USER_FLAG5 1 << 20
#define EXTENSIONCLASS_USER_FLAG6 1 << 21
#define EXTENSIONCLASS_USER_FLAG7 1 << 22
#define EXTENSIONCLASS_USER_FLAG8 1 << 23
#define EXTENSIONCLASS_USER_FLAG9 1 << 24
#define EXTENSIONCLASS_USER_FLAG10 1 << 25
#define EXTENSIONCLASS_USER_FLAG11 1 << 26
#define EXTENSIONCLASS_USER_FLAG12 1 << 27
#define EXTENSIONCLASS_USER_FLAG13 1 << 28
#define EXTENSIONCLASS_USER_FLAG14 1 << 29
#define EXTENSIONCLASS_USER_FLAG15 1 << 30
#define EXTENSIONCLASS_USER_FLAG16 1 << 31
/* This is the class dictionary, which is normally created for you.
If you wish, you can provide your own class dictionary object.
......@@ -282,6 +306,10 @@ typedef struct {
/* Export an Extension Base class in a given module dictionary with a
given name and ExtensionClass structure.
*/
#define ExtensionClassImported \
(PyExtensionClassCAPI=PyCObject_Import("ExtensionClass","CAPI"))
#define PyExtensionClass_Export(D,N,T) \
if(PyExtensionClassCAPI || \
(PyExtensionClassCAPI= PyCObject_Import("ExtensionClass","CAPI"))) \
......@@ -353,11 +381,20 @@ static PyExtensionClass NAME ## Type = { PyObject_HEAD_INIT(NULL) \
(((PyExtensionClass*)((O)->ob_type))->class_flags & \
EXTENSIONCLASS_BINDABLE_FLAG))
/* The following macros are used to check whether an instance
or a class' instanses have instance dictionaries: */
#define HasInstDict(O) \
((((PyExtensionClass*)((O)->ob_type))->class_flags & \
EXTENSIONCLASS_INSTDICT_FLAG))
#define ClassHasInstDict(O) (O->class_flags & EXTENSIONCLASS_INSTDICT_FLAG)
/* Get an object's instance dictionary. Use with caution */
#define INSTANCE_DICT(inst) \
*(((PyObject**)inst) + (inst->ob_type->tp_basicsize/sizeof(PyObject*) - 1))
/*****************************************************************************
WARNING: EVERYTHING BELOW HERE IS PRIVATE TO THE EXTENSION CLASS INTERFACE
......
lib/Components/ExtensionClass/src/ExtensionClass.c
View file @ bb3bf699
/*
$Id: ExtensionClass.c,v 1.8 1997/03/08 12:44:31 jim Exp $
$Id: ExtensionClass.c,v 1.9 1997/04/11 21:47:05 jim Exp $
Extension Class
Copyright
Copyright 1996 Digital Creations, L.C., 910 Princess Anne
......@@ -50,45 +49,11 @@
If you have questions regarding this software,
contact:
Jim Fulton, jim@digicool.com
Digital Creations L.C.
info@digicool.com
(540) 371-6909
$Log: ExtensionClass.c,v $
Revision 1.8 1997/03/08 12:44:31 jim
Moved INSTANCE_DICT macro to public interface.
Revision 1.7 1997/02/24 23:17:47 jim
Fixed bug in subclass_nonzero.
Revision 1.6 1997/02/24 15:43:57 jim
Added __version__ string.
Revision 1.5 1997/02/17 16:27:53 jim
Many changes.
Revision 1.4 1996/12/06 17:12:29 jim
Major speed enhancements for attribute lookup and calling special
methods.
Revision 1.3 1996/10/24 21:07:49 jim
Fixed bug in returning __bases__ for base classes.
Added missing PyErr_Clear() call.
Revision 1.2 1996/10/23 18:36:56 jim
Changed a bunch of single quotes to double and got rid of
some superfluous semicolns that caused warning on SGI.
Fixed bug in CCL_getattr when getting the __base__ attribute of a base
class.
Fixed a doc string.
Revision 1.1 1996/10/22 22:26:08 jim
*** empty log message ***
*/
static char ExtensionClass_module_documentation[] =
......@@ -100,7 +65,7 @@ static char ExtensionClass_module_documentation[] =
" - They provide access to unbound methods,\n"
" - They can be called to create instances.\n"
"\n"
"$Id: ExtensionClass.c,v 1.8 1997/03/08 12:44:31 jim Exp $\n"
"$Id: ExtensionClass.c,v 1.9 1997/04/11 21:47:05 jim Exp $\n"
;
#include <stdio.h>
......@@ -118,7 +83,6 @@ PyVar_Assign(PyObject **v, PyObject *e)
#define UNLESS(E) if(!(E))
#define UNLESS_ASSIGN(V,E) ASSIGN(V,E); UNLESS(V)
/* Declarations for objects of type ExtensionClass */
#include "ExtensionClass.h"
......@@ -134,15 +98,20 @@ staticforward PyExtensionClass ECType;
((O)->ob_type->ob_type == (PyTypeObject*)&ECType && \
(((PyExtensionClass*)((O)->ob_type))->class_flags & \
EXTENSIONCLASS_BINDABLE_FLAG))
#define HasMethodHook(O) \
((O)->ob_type->ob_type == (PyTypeObject*)&ECType && \
(((PyExtensionClass*)((O)->ob_type))->class_flags & \
EXTENSIONCLASS_METHODHOOK_FLAG))
static PyObject *py__add__, *py__sub__, *py__mul__, *py__div__,
*py__mod__, *py__pow__, *py__divmod__, *py__lshift__, *py__rshift__,
*py__and__, *py__or__, *py__xor__, *py__coerce__, *py__neg__,
*py__pos__, *py__abs__, *py__nonzero__, *py__inv__, *py__int__,
*py__long__, *py__float__, *py__oct__, *py__hex__,
*py__of__, *py__call__, *py__call_method__,
*py__getitem__, *py__setitem__, *py__delitem__,
*py__getslice__, *py__setslice__, *py__delslice__,
*py__concat__, *py__repeat__, *py__len__, *py__of__, *py__call__,
*py__concat__, *py__repeat__, *py__len__,
*py__getattr__, *py__setattr__, *py__delattr__,
*py__del__, *py__repr__, *py__str__, *py__class__,
*py__hash__, *py__cmp__, *py__var_size__, *py__init__, *py__getinitargs__,
......@@ -186,6 +155,7 @@ init_py_names()
INIT_PY_NAME(__len__);
INIT_PY_NAME(__of__);
INIT_PY_NAME(__call__);
INIT_PY_NAME(__call_method__);
INIT_PY_NAME(__getattr__);
INIT_PY_NAME(__setattr__);
INIT_PY_NAME(__delattr__);
......@@ -348,12 +318,54 @@ call_cmethod(CMethod *self, PyObject *inst, PyObject *args, PyObject *kw)
}
}
static char *hook_mark="C method being called through a hook.";
static PyObject *
callCMethodWithHook(CMethod *self, PyObject *inst,
PyObject *args, PyObject *kw)
{
PyObject *hook, *m;
UNLESS(m=newCMethod(AsExtensionClass(self->type),
inst, self->name, self->meth,
self->flags, hook_mark)) return NULL;
if(hook=PyObject_GetAttr(inst,py__call_method__))
{
if(CMethod_Check(hook) && ((CMethod*)hook)->meth==self->meth)
{
/* Oops, we are already calling the hook! */
Py_DECREF(hook);
return PyEval_CallObjectWithKeywords(m,args,kw);
}
if(kw)
ASSIGN(hook,PyObject_CallFunction(hook,"OOO",m,args,kw));
else
ASSIGN(hook,PyObject_CallFunction(hook,"OO",m,args));
}
else
{
PyErr_Clear();
hook=PyEval_CallObjectWithKeywords(m,args,kw);
}
Py_DECREF(m);
return hook;
}
static PyObject *
CMethod_call(CMethod *self, PyObject *args, PyObject *kw)
{
int size;
if(self->self) return call_cmethod(self,self->self,args,kw);
if(self->self)
{
if(HasMethodHook(self->self) &&
self->doc != hook_mark /* This check prevents infinite recursion */
)
return callCMethodWithHook(self,self->self,args,kw);
return call_cmethod(self,self->self,args,kw);
}
if((size=PyTuple_Size(args)) > 0)
{
......@@ -369,6 +381,10 @@ CMethod_call(CMethod *self, PyObject *args, PyObject *kw)
);
{
PyObject *rest=0;
if(HasMethodHook(first) &&
self->doc != hook_mark /* This check prevents infinite recursion */
)
return callCMethodWithHook(self,first,args,kw);
UNLESS(rest=PySequence_GetSlice(args,1,size)) return NULL;
ASSIGN(rest,call_cmethod(self,first,rest,kw));
return rest;
......@@ -527,6 +543,32 @@ PMethod_dealloc(PMethod *self)
#endif
}
static PyObject *
callMethodWithPossibleHook(PyObject *inst,
PyObject *meth, PyObject *args, PyObject *kw)
{
if(HasMethodHook(inst))
{
PyObject *hook;
if(hook=PyObject_GetAttr(inst,py__call_method__))
{
if(PMethod_Check(hook) && ((PMethod*)hook)->meth==meth)
{
/* Oops, we are already calling the hook! */
Py_DECREF(hook);
return PyEval_CallObjectWithKeywords(meth,args,kw);
}
if(kw)
ASSIGN(hook,PyObject_CallFunction(hook,"OOO",meth,args,kw));
else
ASSIGN(hook,PyObject_CallFunction(hook,"OO",meth,args));
return hook;
}
PyErr_Clear();
}
return PyEval_CallObjectWithKeywords(meth,args,kw);
}
static PyObject *
call_PMethod(PMethod *self, PyObject *inst, PyObject *args, PyObject *kw)
{
......@@ -534,7 +576,7 @@ call_PMethod(PMethod *self, PyObject *inst, PyObject *args, PyObject *kw)
a=Py_BuildValue("(O)",inst);
if(a) ASSIGN(a,PySequence_Concat(a,args));
if(a) ASSIGN(a,PyEval_CallObjectWithKeywords(self->meth,a,kw));
if(a) ASSIGN(a,callMethodWithPossibleHook(inst,self->meth,a,kw));
return a;
}
......@@ -571,12 +613,12 @@ PMethod_call(PMethod *self, PyObject *args, PyObject *kw)
Py_DECREF(r);
return NULL;
}
ASSIGN(r,PyEval_CallObjectWithKeywords(r,rest,kw));
ASSIGN(r,callMethodWithPossibleHook(first,r,rest,kw));
Py_DECREF(rest);
return r;
}
Py_DECREF(ftype);
return PyEval_CallObjectWithKeywords(self->meth,args,kw);
return callMethodWithPossibleHook(first,self->meth,args,kw);
}
Py_XDECREF(ftype);
}
......@@ -695,7 +737,7 @@ setattr_by_name(PyObject *self, PyObject *args)
{
char *name;
PyObject *v;
UNLESS(PyArg_Parse(args,"sO",&name,&v)) return NULL;
UNLESS(PyArg_ParseTuple(args,"sO",&name,&v)) return NULL;
UNLESS(-1 != self->ob_type->tp_setattr(self,name,v)) return NULL;
Py_INCREF(Py_None);
return Py_None;
......@@ -714,7 +756,7 @@ setattro_by_name(PyObject *self, PyObject *args)
{
PyObject *name;
PyObject *v;
UNLESS(PyArg_Parse(args,"OO",&name,&v)) return NULL;
UNLESS(PyArg_ParseTuple(args,"OO",&name,&v)) return NULL;
UNLESS(-1 != self->ob_type->tp_setattro(self,name,v)) return NULL;
Py_INCREF(Py_None);
return Py_None;
......@@ -763,7 +805,7 @@ setitem_by_name(PyObject *self, PyObject *args)
PyObject *key, *v;
long r;
UNLESS(PyArg_Parse(args,"OO",&key,&v)) return NULL;
UNLESS(PyArg_ParseTuple(args,"OO",&key,&v)) return NULL;
if(self->ob_type->tp_as_mapping)
r=self->ob_type->tp_as_mapping->mp_ass_subscript(self,key,v);
else
......@@ -785,7 +827,7 @@ slice_by_name(PyObject *self, PyObject *args)
{
int i1,i2;
UNLESS(PyArg_Parse(args,"ii",&i1,&i2)) return NULL;
UNLESS(PyArg_ParseTuple(args,"ii",&i1,&i2)) return NULL;
return self->ob_type->tp_as_sequence->sq_slice(self,i1,i2);
}
......@@ -796,7 +838,7 @@ ass_slice_by_name(PyObject *self, PyObject *args)
PyObject *v;
long r;
UNLESS(PyArg_Parse(args,"iiO",&i1,&i2,&v)) return NULL;
UNLESS(PyArg_ParseTuple(args,"iiO",&i1,&i2,&v)) return NULL;
r=self->ob_type->tp_as_sequence->sq_ass_slice(self,i1,i2,v);
if(r<0) return NULL;
Py_INCREF(Py_None);
......@@ -914,9 +956,9 @@ getBaseDictionary(PyExtensionClass *type)
FILLENTRY(type->tp, call, call, 2, "call as a function");
FILLENTRY(type->tp, compare, comp, 0, "compare with another object");
FILLENTRY(type->tp, getattr, getattr, 0, "Get an attribute");
FILLENTRY(type->tp, setattr, setattr, 0, "Set an attribute");
FILLENTRY(type->tp, setattr, setattr, 1, "Set an attribute");
FILLENTRY(type->tp, getattro, getattr, 0, "Get an attribute");
FILLENTRY(type->tp, setattro, setattr, 0, "Set an attribute");
FILLENTRY(type->tp, setattro, setattr, 1, "Set an attribute");
if(sm=type->tp_as_sequence)
{
......@@ -926,9 +968,9 @@ getBaseDictionary(PyExtensionClass *type)
FILLENTRY(sm->sq, repeat, repeat, 0,
"Get a new object that is the object repeated.");
FILLENTRY(sm->sq, item, getitem, 0, "Get an item");
FILLENTRY(sm->sq, slice, getslice, 0, "Get a slice");
FILLENTRY(sm->sq, ass_item, setitem, 0, "Assign an item");
FILLENTRY(sm->sq, ass_slice, setslice, 0, "Assign a slice");
FILLENTRY(sm->sq, slice, getslice, 1, "Get a slice");
FILLENTRY(sm->sq, ass_item, setitem, 1, "Assign an item");
FILLENTRY(sm->sq, ass_slice, setslice, 1, "Assign a slice");
}
if(mm=type->tp_as_mapping)
......@@ -1025,24 +1067,33 @@ err:
}
static PyObject *
inheritedAttribute(PyExtensionClass *self, PyObject *name)
inheritedAttribute(PyObject *self, PyObject *args)
{
UNLESS(name) return PyErr_Format(PyExc_TypeError,
"expected one argument, and none given",
NULL);
return CCL_getattr(self,name,1);
}
PyObject *cls, *name;
static PyObject *
inheritedClassAttribute(PyExtensionClass *self, PyObject *name)
{
UNLESS(name) return PyErr_Format(PyExc_TypeError,
"expected one argument, and none given",
NULL);
UNLESS(name=PySequence_Concat(pyclass_,name)) return NULL;
UNLESS_ASSIGN(name,CCL_getattr(self,name,1)) return NULL;
if(UnboundPMethod_Check(name))
ASSIGN(name,bindPMethod((PMethod*)name,(PyObject*)self));
UNLESS(PyArg_ParseTuple(args,"OO",&cls,&name));
UNLESS(ExtensionClass_Check(cls))
{
PyErr_SetString(PyExc_TypeError,
"inheritedAttribute must be called with an extension "
"class first argument");
return NULL;
}
UNLESS(PyString_Check(name))
{
PyErr_SetString(PyExc_TypeError,
"inheritedAttribute must be called with a "
"string second argument");
return NULL;
}
UNLESS(name=CCL_getattr(AsExtensionClass(cls),name,1)) return NULL;
/* We got something from our class, maybe its an unbound method. */
if(UnboundCMethod_Check(name))
ASSIGN(name,(PyObject*)bindCMethod((CMethod*)name,self));
else if(UnboundPMethod_Check(name))
ASSIGN(name,bindPMethod((PMethod*)name,self));
return name;
}
......@@ -1050,6 +1101,21 @@ struct PyMethodDef ECI_methods[] = {
{"__reduce__",(PyCFunction)EC_reduce,0,
"__reduce__() -- Reduce an instance into it's class and creation data"
},
{"inheritedAttribute",(PyCFunction)inheritedAttribute,1,
"inheritedAttribute(class,name) -- Get an inherited attribute\n\n"
"Get an attribute that would be inherited if the given (extension)\n"
"class did not define it. This method is used when overriding\n"
"inherited methods. It provides 2 advantages over accessing\n"
"\n"
"attributes directly through a superclass:\n"
"\n"
"1. The superclass need not be known,\n"
"\n"
"2. The superclass may be a Python class. Without this method, it would\n"
" be possible to override methods inherited from python classes because\n"
" unbound methods gotten from Python classes cannot be called with \n"
" extension class instances. \n"
},
{NULL, NULL} /* sentinel */
};
......@@ -1165,7 +1231,7 @@ ExtensionClass_FindInstanceAttribute(PyObject *inst, PyObject *oname,
Py_INCREF(self);
return (PyObject*)self;
}
if(self->bases && *n=='d' && strcmp(n,"dict__")==0)
if(ClassHasInstDict(self) && *n=='d' && strcmp(n,"dict__")==0)
{
r = INSTANCE_DICT(inst);
Py_INCREF(r);
......@@ -1173,7 +1239,7 @@ ExtensionClass_FindInstanceAttribute(PyObject *inst, PyObject *oname,
}
}
if(self->bases)
if(ClassHasInstDict(self))
{
r= INSTANCE_DICT(inst);
if((r = PyObject_GetItem(r,oname)) && NeedsToBeBound(r))
......@@ -1278,6 +1344,15 @@ CCL_reduce(PyExtensionClass *self, PyObject *args)
return PyString_FromString(self->tp_name);
}
static PyObject *
obsolete_inheritedAttribute(PyExtensionClass *self, PyObject *name)
{
UNLESS(name) return PyErr_Format(PyExc_TypeError,
"expected one argument, and none given",
NULL);
return CCL_getattr(self,name,1);
}
PyObject *
CCL_getattro(PyExtensionClass *self, PyObject *name)
{
......@@ -1330,18 +1405,10 @@ CCL_getattro(PyExtensionClass *self, PyObject *name)
if(strcmp(nm,"inheritedAttribute")==0)
{
return newCMethod(self,(PyObject*)self,
"inheritedAttribute",(PyCFunction)inheritedAttribute,0,
"inheritedAttribute",
(PyCFunction)obsolete_inheritedAttribute,0,
"look up an attribute in a class's super classes");
}
if(nm && *nm++=='c' && *nm++=='l' && *nm++=='a' && *nm++=='s' && *nm++=='s'
&& *nm=='_')
{
UNLESS(r=CCL_getattr(self,name,0)) return NULL;
if(UnboundPMethod_Check(r))
ASSIGN(r,bindPMethod((PMethod*)r,(PyObject*)self));
return r;
}
if(r=CCL_getattr(self,name,0)) return r;
......@@ -1532,10 +1599,9 @@ CCL_call(PyExtensionClass *self, PyObject *arg, PyObject *kw)
}
Py_INCREF(self);
if(self->bases)
{
UNLESS(INSTANCE_DICT(inst)=PyDict_New()) goto err;
}
if(ClassHasInstDict(self))
UNLESS(INSTANCE_DICT(inst)=PyDict_New()) goto err;
if(init=CCL_getattr(self,py__init__,0))
{
......@@ -2637,7 +2703,7 @@ subclass__init__(PyExtensionClass *self, PyObject *args)
char *name, *p;
int dynamic=1, l;
UNLESS(PyArg_Parse(args,"(sOO)", &name, &bases, &methods)) return NULL;
UNLESS(PyArg_ParseTuple(args,"sOO", &name, &bases, &methods)) return NULL;
l=strlen(name)+1;
UNLESS(p=(char*)malloc(l*sizeof(char))) return PyErr_NoMemory();
memcpy(p,name,l);
......@@ -2661,7 +2727,6 @@ subclass__init__(PyExtensionClass *self, PyObject *args)
UNLESS(type=(PyExtensionClass *)datafull_baseclass(self))
UNLESS(type=(PyExtensionClass *)extension_baseclass(self)) return NULL;
self->tp_name=name;
UNLESS(self->class_dictionary=CopyMethods(type,methods)) return NULL;
......@@ -2696,6 +2761,12 @@ subclass__init__(PyExtensionClass *self, PyObject *args)
if(subclass_hasattr(self,py__of__))
self->class_flags |= EXTENSIONCLASS_BINDABLE_FLAG;
if(subclass_hasattr(self,py__call_method__))
self->class_flags |= EXTENSIONCLASS_METHODHOOK_FLAG;
UNLESS(self->class_flags & EXTENSIONCLASS_NOINSTDICT_FLAG)
self->class_flags |= EXTENSIONCLASS_INSTDICT_FLAG;
if(dynamic || has_number_methods(self))
{
self->tp_as_number=(PyNumberMethods*)malloc(sizeof(PyNumberMethods));
......@@ -2727,9 +2798,11 @@ subclass__init__(PyExtensionClass *self, PyObject *args)
self->tp_doc=0;
/* Check for and use __class_init__ */
if(class_init=PyObject_GetAttrString(AsPyObject(self),"class__init__"))
if(class_init=PyObject_GetAttrString(AsPyObject(self),"__class_init__"))
{
UNLESS_ASSIGN(class_init,PyObject_CallObject(class_init,NULL))
UNLESS_ASSIGN(class_init,PyObject_GetAttrString(class_init,"im_func"))
return NULL;
UNLESS_ASSIGN(class_init,PyObject_CallFunction(class_init,"O",self))
return NULL;
Py_DECREF(class_init);
}
......@@ -2741,7 +2814,7 @@ subclass__init__(PyExtensionClass *self, PyObject *args)
}
struct PyMethodDef ExtensionClass_methods[] = {
{"__init__",(PyCFunction)subclass__init__,0,""},
{"__init__",(PyCFunction)subclass__init__,1,""},
{NULL, NULL} /* sentinel */
};
......@@ -2802,7 +2875,7 @@ void
initExtensionClass()
{
PyObject *m, *d;
char *rev="$Revision: 1.8 $";
char *rev="$Revision: 1.9 $";
PURE_MIXIN_CLASS(Base, "Minimalbase class for Extension Classes", NULL);
PMethodType.ob_type=&PyType_Type;
......@@ -2836,3 +2909,43 @@ initExtensionClass()
CHECK_FOR_ERRORS("can't initialize module ExtensionClass");
}
/****************************************************************************
$Log: ExtensionClass.c,v $
Revision 1.9 1997/04/11 21:47:05 jim
Got rid of class attributes.
Added method hooks.
Revision 1.8 1997/03/08 12:44:31 jim
Moved INSTANCE_DICT macro to public interface.
Revision 1.7 1997/02/24 23:17:47 jim
Fixed bug in subclass_nonzero.
Revision 1.6 1997/02/24 15:43:57 jim
Added __version__ string.
Revision 1.5 1997/02/17 16:27:53 jim
Many changes.
Revision 1.4 1996/12/06 17:12:29 jim
Major speed enhancements for attribute lookup and calling special
methods.
Revision 1.3 1996/10/24 21:07:49 jim
Fixed bug in returning __bases__ for base classes.
Added missing PyErr_Clear() call.
Revision 1.2 1996/10/23 18:36:56 jim
Changed a bunch of single quotes to double and got rid of
some superfluous semicolns that caused warning on SGI.
Fixed bug in CCL_getattr when getting the __base__ attribute of a base
class.
Fixed a doc string.
Revision 1.1 1996/10/22 22:26:08 jim
*** empty log message ***
****************************************************************************/
lib/Components/ExtensionClass/src/ExtensionClass.h
View file @ bb3bf699
/*
$Id: ExtensionClass.h,v 1.5 1997/03/08 12:44:13 jim Exp $
$Id: ExtensionClass.h,v 1.6 1997/04/11 21:47:51 jim Exp $
Extension Class Definitions
......@@ -113,6 +113,10 @@
$Log: ExtensionClass.h,v $
Revision 1.6 1997/04/11 21:47:51 jim
Got rid of class attributes.
Added method hooks.
Revision 1.5 1997/03/08 12:44:13 jim
Moved INSTANCE_DICT macro to public interface.
......@@ -188,13 +192,33 @@ typedef struct {
*/
PyMethodChain methods;
/* You may set certain flags here. Only two flags are
defined at this point, the first of which is not currently
used.
*/
/* You may set certain flags here. */
long class_flags;
#define EXTENSIONCLASS_DYNAMIC_FLAG 1
#define EXTENSIONCLASS_BINDABLE_FLAG 2
/* The following flags are used by ExtensionClass */
#define EXTENSIONCLASS_DYNAMIC_FLAG 1 << 0
#define EXTENSIONCLASS_BINDABLE_FLAG 1 << 2
#define EXTENSIONCLASS_METHODHOOK_FLAG 1 << 3
#define EXTENSIONCLASS_INSTDICT_FLAG 1 << 4
#define EXTENSIONCLASS_NOINSTDICT_FLAG 1 << 5
/* The following flags are for use by extension class developers. */
#define EXTENSIONCLASS_USER_FLAG1 1 << 16
#define EXTENSIONCLASS_USER_FLAG2 1 << 17
#define EXTENSIONCLASS_USER_FLAG3 1 << 18
#define EXTENSIONCLASS_USER_FLAG4 1 << 19
#define EXTENSIONCLASS_USER_FLAG5 1 << 20
#define EXTENSIONCLASS_USER_FLAG6 1 << 21
#define EXTENSIONCLASS_USER_FLAG7 1 << 22
#define EXTENSIONCLASS_USER_FLAG8 1 << 23
#define EXTENSIONCLASS_USER_FLAG9 1 << 24
#define EXTENSIONCLASS_USER_FLAG10 1 << 25
#define EXTENSIONCLASS_USER_FLAG11 1 << 26
#define EXTENSIONCLASS_USER_FLAG12 1 << 27
#define EXTENSIONCLASS_USER_FLAG13 1 << 28
#define EXTENSIONCLASS_USER_FLAG14 1 << 29
#define EXTENSIONCLASS_USER_FLAG15 1 << 30
#define EXTENSIONCLASS_USER_FLAG16 1 << 31
/* This is the class dictionary, which is normally created for you.
If you wish, you can provide your own class dictionary object.
......@@ -282,6 +306,10 @@ typedef struct {
/* Export an Extension Base class in a given module dictionary with a
given name and ExtensionClass structure.
*/
#define ExtensionClassImported \
(PyExtensionClassCAPI=PyCObject_Import("ExtensionClass","CAPI"))
#define PyExtensionClass_Export(D,N,T) \
if(PyExtensionClassCAPI || \
(PyExtensionClassCAPI= PyCObject_Import("ExtensionClass","CAPI"))) \
......@@ -353,11 +381,20 @@ static PyExtensionClass NAME ## Type = { PyObject_HEAD_INIT(NULL) \
(((PyExtensionClass*)((O)->ob_type))->class_flags & \
EXTENSIONCLASS_BINDABLE_FLAG))
/* The following macros are used to check whether an instance
or a class' instanses have instance dictionaries: */
#define HasInstDict(O) \
((((PyExtensionClass*)((O)->ob_type))->class_flags & \
EXTENSIONCLASS_INSTDICT_FLAG))
#define ClassHasInstDict(O) (O->class_flags & EXTENSIONCLASS_INSTDICT_FLAG)
/* Get an object's instance dictionary. Use with caution */
#define INSTANCE_DICT(inst) \
*(((PyObject**)inst) + (inst->ob_type->tp_basicsize/sizeof(PyObject*) - 1))
/*****************************************************************************
WARNING: EVERYTHING BELOW HERE IS PRIVATE TO THE EXTENSION CLASS INTERFACE
......
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