/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Python XPCOM language bindings.
*
* The Initial Developer of the Original Code is
* ActiveState Tool Corp.
* Portions created by the Initial Developer are Copyright (C) 2000
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Mark Hammond <MarkH@ActiveState.com> (original author)
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
//
// This code is part of the XPCOM extensions for Python.
//
// Written May 2000 by Mark Hammond.
//
// Based heavily on the Python COM support, which is
// (c) Mark Hammond and Greg Stein.
//
// (c) 2000, ActiveState corp.
#include "PyXPCOM_std.h"
#include <nsIEnumerator.h>
static nsIEnumerator *GetI(PyObject *self) {
nsIID iid = NS_GET_IID(nsIEnumerator);
if (!Py_nsISupports::Check(self, iid)) {
PyErr_SetString(PyExc_TypeError, "This object is not the correct interface");
return NULL;
}
return (nsIEnumerator *)Py_nsISupports::GetI(self);
}
static PyObject *PyFirst(PyObject *self, PyObject *args)
{
if (!PyArg_ParseTuple(args, ":First"))
return NULL;
nsIEnumerator *pI = GetI(self);
if (pI==NULL)
return NULL;
nsresult r;
Py_BEGIN_ALLOW_THREADS;
r = pI->First();
Py_END_ALLOW_THREADS;
return PyInt_FromLong(r);
}
static PyObject *PyNext(PyObject *self, PyObject *args)
{
if (!PyArg_ParseTuple(args, ":Next"))
return NULL;
nsIEnumerator *pI = GetI(self);
if (pI==NULL)
return NULL;
nsresult r;
Py_BEGIN_ALLOW_THREADS;
r = pI->Next();
Py_END_ALLOW_THREADS;
return PyInt_FromLong(r);
}
static PyObject *PyCurrentItem(PyObject *self, PyObject *args)
{
PyObject *obIID = NULL;
if (!PyArg_ParseTuple(args, "|O:CurrentItem", &obIID))
return NULL;
nsIID iid(NS_GET_IID(nsISupports));
if (obIID != NULL && !Py_nsIID::IIDFromPyObject(obIID, &iid))
return NULL;
nsIEnumerator *pI = GetI(self);
if (pI==NULL)
return NULL;
nsISupports *pRet = nsnull;
nsresult r;
Py_BEGIN_ALLOW_THREADS;
r = pI->CurrentItem(&pRet);
Py_END_ALLOW_THREADS;
if ( NS_FAILED(r) )
return PyXPCOM_BuildPyException(r);
if (obIID) {
nsISupports *temp;
Py_BEGIN_ALLOW_THREADS;
r = pRet->QueryInterface(iid, (void **)&temp);
pRet->Release();
Py_END_ALLOW_THREADS;
if ( NS_FAILED(r) ) {
return PyXPCOM_BuildPyException(r);
}
pRet = temp;
}
PyObject *ret = Py_nsISupports::PyObjectFromInterface(pRet, iid);
NS_IF_RELEASE(pRet);
return ret;
}
// A method added for Python performance if you really need
// it. Allows you to fetch a block of objects in one
// hit, allowing the loop to remain implemented in C.
static PyObject *PyFetchBlock(PyObject *self, PyObject *args)
{
PyObject *obIID = NULL;
int n_wanted;
int n_fetched = 0;
if (!PyArg_ParseTuple(args, "i|O:FetchBlock", &n_wanted, &obIID))
return NULL;
nsIID iid(NS_GET_IID(nsISupports));
if (obIID != NULL && !Py_nsIID::IIDFromPyObject(obIID, &iid))
return NULL;
nsIEnumerator *pI = GetI(self);
if (pI==NULL)
return NULL;
// We want to fetch with the thread-lock released,
// but this means we can not append to the PyList
nsISupports **fetched = new nsISupports*[n_wanted];
if (fetched==nsnull) {
PyErr_NoMemory();
return NULL;
}
memset(fetched, 0, sizeof(nsISupports *) * n_wanted);
nsresult r = NS_OK;
Py_BEGIN_ALLOW_THREADS;
for (;n_fetched<n_wanted;) {
nsISupports *pNew;
r = pI->CurrentItem(&pNew);
if (NS_FAILED(r)) {
r = 0; // Normal enum end
break;
}
if (obIID) {
nsISupports *temp;
r = pNew->QueryInterface(iid, (void **)&temp);
pNew->Release();
if ( NS_FAILED(r) ) {
break;
}
pNew = temp;
}
fetched[n_fetched] = pNew;
n_fetched++; // must increment before breaking out.
if (NS_FAILED(pI->Next()))
break; // not an error condition.
}
Py_END_ALLOW_THREADS;
PyObject *ret;
if (NS_SUCCEEDED(r)) {
ret = PyList_New(n_fetched);
if (ret)
for (int i=0;i<n_fetched;i++) {
PyObject *new_ob = Py_nsISupports::PyObjectFromInterface(fetched[i], iid);
NS_IF_RELEASE(fetched[i]);
PyList_SET_ITEM(ret, i, new_ob);
}
} else
ret = PyXPCOM_BuildPyException(r);
if ( ret == NULL ) {
// Free the objects we consumed.
for (int i=0;i<n_fetched;i++)
fetched[i]->Release();
}
delete [] fetched;
return ret;
}
static PyObject *PyIsDone(PyObject *self, PyObject *args)
{
if (!PyArg_ParseTuple(args, ":IsDone"))
return NULL;
nsIEnumerator *pI = GetI(self);
nsresult r;
if (pI==NULL)
return NULL;
Py_BEGIN_ALLOW_THREADS;
r = pI->IsDone();
Py_END_ALLOW_THREADS;
if (NS_FAILED(r))
return PyXPCOM_BuildPyException(r);
PyObject *ret = r==NS_OK ? Py_True : Py_False;
Py_INCREF(ret);
return ret;
}
struct PyMethodDef
PyMethods_IEnumerator[] =
{
{ "First", PyFirst, 1},
{ "first", PyFirst, 1},
{ "Next", PyNext, 1},
{ "next", PyNext, 1},
{ "CurrentItem", PyCurrentItem, 1},
{ "currentItem", PyCurrentItem, 1},
{ "IsDone", PyIsDone, 1},
{ "isDone", PyIsDone, 1},
{ "FetchBlock", PyFetchBlock, 1},
{ "fetchBlock", PyFetchBlock, 1},
{NULL}
};