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318 lines
9.5 KiB
318 lines
9.5 KiB
"""Utility file for generating PyIEnum support.
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This is almost a 'template' file. It simplay contains almost full
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C++ source code for PyIEnum* support, and the Python code simply
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substitutes the appropriate interface name.
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This module is notmally not used directly - the @makegw@ module
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automatically calls this.
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"""
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#
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# INTERNAL FUNCTIONS
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#
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#
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import string
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def is_interface_enum(enumtype):
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return not (enumtype[0] in string.uppercase and enumtype[2] in string.uppercase)
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def _write_enumifc_cpp(f, interface):
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enumtype = interface.name[5:]
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if is_interface_enum(enumtype):
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# Assume an interface.
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enum_interface = "I" + enumtype[:-1]
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converter = "PyObject *ob = PyCom_PyObjectFromIUnknown(rgVar[i], IID_%(enum_interface)s, FALSE);" % locals()
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arraydeclare = "%(enum_interface)s **rgVar = new %(enum_interface)s *[celt];" % locals()
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else:
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# Enum of a simple structure
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converter = "PyObject *ob = PyCom_PyObjectFrom%(enumtype)s(&rgVar[i]);" % locals()
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arraydeclare = "%(enumtype)s *rgVar = new %(enumtype)s[celt];" % locals()
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f.write(\
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'''
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// ---------------------------------------------------
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//
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// Interface Implementation
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PyIEnum%(enumtype)s::PyIEnum%(enumtype)s(IUnknown *pdisp):
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PyIUnknown(pdisp)
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{
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ob_type = &type;
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}
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PyIEnum%(enumtype)s::~PyIEnum%(enumtype)s()
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{
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}
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/* static */ IEnum%(enumtype)s *PyIEnum%(enumtype)s::GetI(PyObject *self)
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{
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return (IEnum%(enumtype)s *)PyIUnknown::GetI(self);
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}
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// @pymethod object|PyIEnum%(enumtype)s|Next|Retrieves a specified number of items in the enumeration sequence.
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PyObject *PyIEnum%(enumtype)s::Next(PyObject *self, PyObject *args)
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{
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long celt = 1;
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// @pyparm int|num|1|Number of items to retrieve.
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if ( !PyArg_ParseTuple(args, "|l:Next", &celt) )
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return NULL;
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IEnum%(enumtype)s *pIE%(enumtype)s = GetI(self);
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if ( pIE%(enumtype)s == NULL )
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return NULL;
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%(arraydeclare)s
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if ( rgVar == NULL ) {
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PyErr_SetString(PyExc_MemoryError, "allocating result %(enumtype)ss");
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return NULL;
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}
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int i;
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/* for ( i = celt; i--; )
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// *** possibly init each structure element???
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*/
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ULONG celtFetched = 0;
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PY_INTERFACE_PRECALL;
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HRESULT hr = pIE%(enumtype)s->Next(celt, rgVar, &celtFetched);
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PY_INTERFACE_POSTCALL;
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if ( HRESULT_CODE(hr) != ERROR_NO_MORE_ITEMS && FAILED(hr) )
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{
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delete [] rgVar;
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return PyCom_BuildPyException(hr,pIE%(enumtype)s, IID_IE%(enumtype)s);
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}
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PyObject *result = PyTuple_New(celtFetched);
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if ( result != NULL )
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{
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for ( i = celtFetched; i--; )
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{
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%(converter)s
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if ( ob == NULL )
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{
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Py_DECREF(result);
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result = NULL;
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break;
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}
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PyTuple_SET_ITEM(result, i, ob);
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}
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}
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/* for ( i = celtFetched; i--; )
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// *** possibly cleanup each structure element???
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*/
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delete [] rgVar;
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return result;
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}
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// @pymethod |PyIEnum%(enumtype)s|Skip|Skips over the next specified elementes.
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PyObject *PyIEnum%(enumtype)s::Skip(PyObject *self, PyObject *args)
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{
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long celt;
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if ( !PyArg_ParseTuple(args, "l:Skip", &celt) )
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return NULL;
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IEnum%(enumtype)s *pIE%(enumtype)s = GetI(self);
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if ( pIE%(enumtype)s == NULL )
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return NULL;
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PY_INTERFACE_PRECALL;
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HRESULT hr = pIE%(enumtype)s->Skip(celt);
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PY_INTERFACE_POSTCALL;
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if ( FAILED(hr) )
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return PyCom_BuildPyException(hr, pIE%(enumtype)s, IID_IE%(enumtype)s);
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Py_INCREF(Py_None);
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return Py_None;
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}
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// @pymethod |PyIEnum%(enumtype)s|Reset|Resets the enumeration sequence to the beginning.
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PyObject *PyIEnum%(enumtype)s::Reset(PyObject *self, PyObject *args)
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{
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if ( !PyArg_ParseTuple(args, ":Reset") )
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return NULL;
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IEnum%(enumtype)s *pIE%(enumtype)s = GetI(self);
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if ( pIE%(enumtype)s == NULL )
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return NULL;
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PY_INTERFACE_PRECALL;
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HRESULT hr = pIE%(enumtype)s->Reset();
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PY_INTERFACE_POSTCALL;
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if ( FAILED(hr) )
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return PyCom_BuildPyException(hr, pIE%(enumtype)s, IID_IE%(enumtype)s);
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Py_INCREF(Py_None);
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return Py_None;
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}
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// @pymethod <o PyIEnum%(enumtype)s>|PyIEnum%(enumtype)s|Clone|Creates another enumerator that contains the same enumeration state as the current one
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PyObject *PyIEnum%(enumtype)s::Clone(PyObject *self, PyObject *args)
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{
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if ( !PyArg_ParseTuple(args, ":Clone") )
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return NULL;
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IEnum%(enumtype)s *pIE%(enumtype)s = GetI(self);
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if ( pIE%(enumtype)s == NULL )
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return NULL;
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IEnum%(enumtype)s *pClone;
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PY_INTERFACE_PRECALL;
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HRESULT hr = pIE%(enumtype)s->Clone(&pClone);
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PY_INTERFACE_POSTCALL;
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if ( FAILED(hr) )
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return PyCom_BuildPyException(hr, pIE%(enumtype)s, IID_IE%(enumtype)s);
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return PyCom_PyObjectFromIUnknown(pClone, IID_IEnum%(enumtype)s, FALSE);
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}
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// @object PyIEnum%(enumtype)s|A Python interface to IEnum%(enumtype)s
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static struct PyMethodDef PyIEnum%(enumtype)s_methods[] =
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{
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{ "Next", PyIEnum%(enumtype)s::Next, 1 }, // @pymeth Next|Retrieves a specified number of items in the enumeration sequence.
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{ "Skip", PyIEnum%(enumtype)s::Skip, 1 }, // @pymeth Skip|Skips over the next specified elementes.
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{ "Reset", PyIEnum%(enumtype)s::Reset, 1 }, // @pymeth Reset|Resets the enumeration sequence to the beginning.
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{ "Clone", PyIEnum%(enumtype)s::Clone, 1 }, // @pymeth Clone|Creates another enumerator that contains the same enumeration state as the current one.
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{ NULL }
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};
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PyComEnumTypeObject PyIEnum%(enumtype)s::type("PyIEnum%(enumtype)s",
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&PyIUnknown::type,
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sizeof(PyIEnum%(enumtype)s),
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PyIEnum%(enumtype)s_methods,
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GET_PYCOM_CTOR(PyIEnum%(enumtype)s));
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''' % locals() )
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def _write_enumgw_cpp(f, interface):
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enumtype = interface.name[5:]
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if is_interface_enum(enumtype):
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# Assume an interface.
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enum_interface = "I" + enumtype[:-1]
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converter = "if ( !PyCom_InterfaceFromPyObject(ob, IID_%(enum_interface)s, (void **)&rgVar[i], FALSE) )" % locals()
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argdeclare="%(enum_interface)s __RPC_FAR * __RPC_FAR *rgVar" % locals()
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else:
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argdeclare="%(enumtype)s __RPC_FAR *rgVar" % locals()
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converter="if ( !PyCom_PyObjectAs%(enumtype)s(ob, &rgVar[i]) )" % locals()
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f.write(
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'''
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// ---------------------------------------------------
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//
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// Gateway Implementation
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// Std delegation
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STDMETHODIMP_(ULONG) PyGEnum%(enumtype)s::AddRef(void) {return PyGatewayBase::AddRef();}
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STDMETHODIMP_(ULONG) PyGEnum%(enumtype)s::Release(void) {return PyGatewayBase::Release();}
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STDMETHODIMP PyGEnum%(enumtype)s::QueryInterface(REFIID iid, void ** obj) {return PyGatewayBase::QueryInterface(iid, obj);}
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STDMETHODIMP PyGEnum%(enumtype)s::GetTypeInfoCount(UINT FAR* pctInfo) {return PyGatewayBase::GetTypeInfoCount(pctInfo);}
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STDMETHODIMP PyGEnum%(enumtype)s::GetTypeInfo(UINT itinfo, LCID lcid, ITypeInfo FAR* FAR* pptInfo) {return PyGatewayBase::GetTypeInfo(itinfo, lcid, pptInfo);}
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STDMETHODIMP PyGEnum%(enumtype)s::GetIDsOfNames(REFIID refiid, OLECHAR FAR* FAR* rgszNames, UINT cNames, LCID lcid, DISPID FAR* rgdispid) {return PyGatewayBase::GetIDsOfNames( refiid, rgszNames, cNames, lcid, rgdispid);}
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STDMETHODIMP PyGEnum%(enumtype)s::Invoke(DISPID dispid, REFIID riid, LCID lcid, WORD wFlags, DISPPARAMS FAR* params, VARIANT FAR* pVarResult, EXCEPINFO FAR* pexcepinfo, UINT FAR* puArgErr) {return PyGatewayBase::Invoke( dispid, riid, lcid, wFlags, params, pVarResult, pexcepinfo, puArgErr);}
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STDMETHODIMP PyGEnum%(enumtype)s::Next(
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/* [in] */ ULONG celt,
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/* [length_is][size_is][out] */ %(argdeclare)s,
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/* [out] */ ULONG __RPC_FAR *pCeltFetched)
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{
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PY_GATEWAY_METHOD;
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PyObject *result;
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HRESULT hr = InvokeViaPolicy("Next", &result, "i", celt);
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if ( FAILED(hr) )
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return hr;
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if ( !PySequence_Check(result) )
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goto error;
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int len;
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len = PyObject_Length(result);
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if ( len == -1 )
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goto error;
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if ( len > (int)celt)
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len = celt;
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if ( pCeltFetched )
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*pCeltFetched = len;
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int i;
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for ( i = 0; i < len; ++i )
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{
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PyObject *ob = PySequence_GetItem(result, i);
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if ( ob == NULL )
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goto error;
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%(converter)s
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{
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Py_DECREF(result);
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return PyCom_SetCOMErrorFromPyException(IID_IEnum%(enumtype)s);
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}
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}
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Py_DECREF(result);
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return len < (int)celt ? S_FALSE : S_OK;
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error:
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PyErr_Clear(); // just in case
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Py_DECREF(result);
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return PyCom_SetCOMErrorFromSimple(E_FAIL, IID_IEnum%(enumtype)s, "Next() did not return a sequence of objects");
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}
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STDMETHODIMP PyGEnum%(enumtype)s::Skip(
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/* [in] */ ULONG celt)
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{
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PY_GATEWAY_METHOD;
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return InvokeViaPolicy("Skip", NULL, "i", celt);
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}
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STDMETHODIMP PyGEnum%(enumtype)s::Reset(void)
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{
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PY_GATEWAY_METHOD;
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return InvokeViaPolicy("Reset");
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}
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STDMETHODIMP PyGEnum%(enumtype)s::Clone(
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/* [out] */ IEnum%(enumtype)s __RPC_FAR *__RPC_FAR *ppEnum)
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{
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PY_GATEWAY_METHOD;
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PyObject * result;
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HRESULT hr = InvokeViaPolicy("Clone", &result);
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if ( FAILED(hr) )
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return hr;
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/*
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** Make sure we have the right kind of object: we should have some kind
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** of IUnknown subclass wrapped into a PyIUnknown instance.
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*/
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if ( !PyIBase::is_object(result, &PyIUnknown::type) )
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{
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/* the wrong kind of object was returned to us */
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Py_DECREF(result);
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return PyCom_SetCOMErrorFromSimple(E_FAIL, IID_IEnum%(enumtype)s);
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}
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/*
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** Get the IUnknown out of the thing. note that the Python ob maintains
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** a reference, so we don't have to explicitly AddRef() here.
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*/
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IUnknown *punk = ((PyIUnknown *)result)->m_obj;
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if ( !punk )
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{
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/* damn. the object was released. */
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Py_DECREF(result);
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return PyCom_SetCOMErrorFromSimple(E_FAIL, IID_IEnum%(enumtype)s);
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}
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/*
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** Get the interface we want. note it is returned with a refcount.
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** This QI is actually going to instantiate a PyGEnum%(enumtype)s.
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*/
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hr = punk->QueryInterface(IID_IEnum%(enumtype)s, (LPVOID *)ppEnum);
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/* done with the result; this DECREF is also for <punk> */
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Py_DECREF(result);
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return PyCom_SetCOMErrorFromSimple(hr, IID_IEnum%(enumtype)s, "Python could not convert the result from Next() into the required COM interface");
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}
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''' % locals())
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