--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/python-2.6.1/Objects/genobject.c	Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,414 @@
+/* Generator object implementation */
+
+#include "Python.h"
+#include "frameobject.h"
+#include "genobject.h"
+#include "ceval.h"
+#include "structmember.h"
+#include "opcode.h"
+
+static int
+gen_traverse(PyGenObject *gen, visitproc visit, void *arg)
+{
+	Py_VISIT((PyObject *)gen->gi_frame);
+	Py_VISIT(gen->gi_code);
+	return 0;
+}
+
+static void
+gen_dealloc(PyGenObject *gen)
+{
+	PyObject *self = (PyObject *) gen;
+
+	_PyObject_GC_UNTRACK(gen);
+
+	if (gen->gi_weakreflist != NULL)
+		PyObject_ClearWeakRefs(self);
+
+	_PyObject_GC_TRACK(self);
+
+	if (gen->gi_frame != NULL && gen->gi_frame->f_stacktop != NULL) {
+		/* Generator is paused, so we need to close */
+		Py_TYPE(gen)->tp_del(self);
+		if (self->ob_refcnt > 0)
+			return;		/* resurrected.  :( */
+	}
+
+	_PyObject_GC_UNTRACK(self);
+	Py_CLEAR(gen->gi_frame);
+	Py_CLEAR(gen->gi_code);
+	PyObject_GC_Del(gen);
+}
+
+
+static PyObject *
+gen_send_ex(PyGenObject *gen, PyObject *arg, int exc)
+{
+	PyThreadState *tstate = PyThreadState_GET();
+	PyFrameObject *f = gen->gi_frame;
+	PyObject *result;
+
+	if (gen->gi_running) {
+		PyErr_SetString(PyExc_ValueError,
+				"generator already executing");
+		return NULL;
+	}
+	if (f==NULL || f->f_stacktop == NULL) {
+		/* Only set exception if called from send() */
+		if (arg && !exc)
+			PyErr_SetNone(PyExc_StopIteration);
+		return NULL;
+	}
+
+	if (f->f_lasti == -1) {
+		if (arg && arg != Py_None) {
+			PyErr_SetString(PyExc_TypeError,
+					"can't send non-None value to a "
+					"just-started generator");
+			return NULL;
+		}
+	} else {
+		/* Push arg onto the frame's value stack */
+		result = arg ? arg : Py_None;
+	        Py_INCREF(result);
+	        *(f->f_stacktop++) = result;
+	}
+
+	/* Generators always return to their most recent caller, not
+	 * necessarily their creator. */
+	Py_XINCREF(tstate->frame);
+	assert(f->f_back == NULL);
+	f->f_back = tstate->frame;
+
+	gen->gi_running = 1;
+	result = PyEval_EvalFrameEx(f, exc);
+	gen->gi_running = 0;
+
+	/* Don't keep the reference to f_back any longer than necessary.  It
+	 * may keep a chain of frames alive or it could create a reference
+	 * cycle. */
+	assert(f->f_back == tstate->frame);
+	Py_CLEAR(f->f_back);
+
+	/* If the generator just returned (as opposed to yielding), signal
+	 * that the generator is exhausted. */
+	if (result == Py_None && f->f_stacktop == NULL) {
+		Py_DECREF(result);
+		result = NULL;
+		/* Set exception if not called by gen_iternext() */
+		if (arg)
+			PyErr_SetNone(PyExc_StopIteration);
+	}
+
+	if (!result || f->f_stacktop == NULL) {
+		/* generator can't be rerun, so release the frame */
+		Py_DECREF(f);
+		gen->gi_frame = NULL;
+	}
+
+	return result;
+}
+
+PyDoc_STRVAR(send_doc,
+"send(arg) -> send 'arg' into generator,\n\
+return next yielded value or raise StopIteration.");
+
+static PyObject *
+gen_send(PyGenObject *gen, PyObject *arg)
+{
+	return gen_send_ex(gen, arg, 0);
+}
+
+PyDoc_STRVAR(close_doc,
+"close(arg) -> raise GeneratorExit inside generator.");
+
+static PyObject *
+gen_close(PyGenObject *gen, PyObject *args)
+{
+	PyObject *retval;
+	PyErr_SetNone(PyExc_GeneratorExit);
+	retval = gen_send_ex(gen, Py_None, 1);
+	if (retval) {
+		Py_DECREF(retval);
+		PyErr_SetString(PyExc_RuntimeError,
+				"generator ignored GeneratorExit");
+		return NULL;
+	}
+	if (PyErr_ExceptionMatches(PyExc_StopIteration)
+	    || PyErr_ExceptionMatches(PyExc_GeneratorExit))
+	{
+		PyErr_Clear();	/* ignore these errors */
+		Py_INCREF(Py_None);
+		return Py_None;
+	}
+	return NULL;
+}
+
+static void
+gen_del(PyObject *self)
+{
+        PyObject *res;
+        PyObject *error_type, *error_value, *error_traceback;
+	PyGenObject *gen = (PyGenObject *)self;
+
+	if (gen->gi_frame == NULL || gen->gi_frame->f_stacktop == NULL)
+		/* Generator isn't paused, so no need to close */
+		return;
+
+        /* Temporarily resurrect the object. */
+        assert(self->ob_refcnt == 0);
+        self->ob_refcnt = 1;
+
+        /* Save the current exception, if any. */
+        PyErr_Fetch(&error_type, &error_value, &error_traceback);
+
+	res = gen_close(gen, NULL);
+
+	if (res == NULL)
+		PyErr_WriteUnraisable(self);
+	else
+		Py_DECREF(res);
+
+        /* Restore the saved exception. */
+        PyErr_Restore(error_type, error_value, error_traceback);
+
+        /* Undo the temporary resurrection; can't use DECREF here, it would
+         * cause a recursive call.
+         */
+        assert(self->ob_refcnt > 0);
+        if (--self->ob_refcnt == 0)
+                return; /* this is the normal path out */
+
+        /* close() resurrected it!  Make it look like the original Py_DECREF
+         * never happened.
+         */
+        {
+                Py_ssize_t refcnt = self->ob_refcnt;
+                _Py_NewReference(self);
+                self->ob_refcnt = refcnt;
+        }
+        assert(PyType_IS_GC(self->ob_type) &&
+               _Py_AS_GC(self)->gc.gc_refs != _PyGC_REFS_UNTRACKED);
+
+        /* If Py_REF_DEBUG, _Py_NewReference bumped _Py_RefTotal, so
+         * we need to undo that. */
+        _Py_DEC_REFTOTAL;
+        /* If Py_TRACE_REFS, _Py_NewReference re-added self to the object
+         * chain, so no more to do there.
+         * If COUNT_ALLOCS, the original decref bumped tp_frees, and
+         * _Py_NewReference bumped tp_allocs:  both of those need to be
+         * undone.
+         */
+#ifdef COUNT_ALLOCS
+        --self->ob_type->tp_frees;
+        --self->ob_type->tp_allocs;
+#endif
+}
+
+
+
+PyDoc_STRVAR(throw_doc,
+"throw(typ[,val[,tb]]) -> raise exception in generator,\n\
+return next yielded value or raise StopIteration.");
+
+static PyObject *
+gen_throw(PyGenObject *gen, PyObject *args)
+{
+	PyObject *typ;
+	PyObject *tb = NULL;
+	PyObject *val = NULL;
+
+	if (!PyArg_UnpackTuple(args, "throw", 1, 3, &typ, &val, &tb))
+		return NULL;
+
+	/* First, check the traceback argument, replacing None with
+	   NULL. */
+	if (tb == Py_None)
+		tb = NULL;
+	else if (tb != NULL && !PyTraceBack_Check(tb)) {
+		PyErr_SetString(PyExc_TypeError,
+			"throw() third argument must be a traceback object");
+		return NULL;
+	}
+
+	Py_INCREF(typ);
+	Py_XINCREF(val);
+	Py_XINCREF(tb);
+
+	if (PyExceptionClass_Check(typ)) {
+		PyErr_NormalizeException(&typ, &val, &tb);
+	}
+
+	else if (PyExceptionInstance_Check(typ)) {
+		/* Raising an instance.  The value should be a dummy. */
+		if (val && val != Py_None) {
+			PyErr_SetString(PyExc_TypeError,
+			  "instance exception may not have a separate value");
+			goto failed_throw;
+		}
+		else {
+			/* Normalize to raise <class>, <instance> */
+			Py_XDECREF(val);
+			val = typ;
+			typ = PyExceptionInstance_Class(typ);
+			Py_INCREF(typ);
+		}
+	}
+	else {
+		/* Not something you can raise.  throw() fails. */
+		PyErr_Format(PyExc_TypeError,
+			     "exceptions must be classes, or instances, not %s",
+			     typ->ob_type->tp_name);
+			goto failed_throw;
+	}
+
+	PyErr_Restore(typ, val, tb);
+	return gen_send_ex(gen, Py_None, 1);
+
+failed_throw:
+	/* Didn't use our arguments, so restore their original refcounts */
+	Py_DECREF(typ);
+	Py_XDECREF(val);
+	Py_XDECREF(tb);
+	return NULL;
+}
+
+
+static PyObject *
+gen_iternext(PyGenObject *gen)
+{
+	return gen_send_ex(gen, NULL, 0);
+}
+
+
+static PyObject *
+gen_repr(PyGenObject *gen)
+{
+	char *code_name;
+	code_name = PyString_AsString(((PyCodeObject *)gen->gi_code)->co_name);
+	if (code_name == NULL)
+		return NULL;
+	return PyString_FromFormat("<generator object %.200s at %p>",
+				   code_name, gen);
+}
+
+
+static PyObject *
+gen_get_name(PyGenObject *gen)
+{
+	PyObject *name = ((PyCodeObject *)gen->gi_code)->co_name;
+	Py_INCREF(name);
+	return name;
+}
+
+
+PyDoc_STRVAR(gen__name__doc__,
+"Return the name of the generator's associated code object.");
+
+static PyGetSetDef gen_getsetlist[] = {
+	{"__name__", (getter)gen_get_name, NULL, NULL, gen__name__doc__},
+	{NULL}
+};
+
+
+static PyMemberDef gen_memberlist[] = {
+	{"gi_frame",	T_OBJECT, offsetof(PyGenObject, gi_frame),	RO},
+	{"gi_running",	T_INT,    offsetof(PyGenObject, gi_running),	RO},
+        {"gi_code",     T_OBJECT, offsetof(PyGenObject, gi_code),  RO},
+	{NULL}	/* Sentinel */
+};
+
+static PyMethodDef gen_methods[] = {
+	{"send",(PyCFunction)gen_send, METH_O, send_doc},
+	{"throw",(PyCFunction)gen_throw, METH_VARARGS, throw_doc},
+	{"close",(PyCFunction)gen_close, METH_NOARGS, close_doc},
+	{NULL, NULL}	/* Sentinel */
+};
+
+PyTypeObject PyGen_Type = {
+	PyVarObject_HEAD_INIT(&PyType_Type, 0)
+	"generator",				/* tp_name */
+	sizeof(PyGenObject),			/* tp_basicsize */
+	0,					/* tp_itemsize */
+	/* methods */
+	(destructor)gen_dealloc, 		/* tp_dealloc */
+	0,					/* tp_print */
+	0, 					/* tp_getattr */
+	0,					/* tp_setattr */
+	0,					/* tp_compare */
+	(reprfunc)gen_repr,			/* tp_repr */
+	0,					/* tp_as_number */
+	0,					/* tp_as_sequence */
+	0,					/* tp_as_mapping */
+	0,					/* tp_hash */
+	0,					/* tp_call */
+	0,					/* tp_str */
+	PyObject_GenericGetAttr,		/* tp_getattro */
+	0,					/* tp_setattro */
+	0,					/* tp_as_buffer */
+	Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,/* tp_flags */
+ 	0,					/* tp_doc */
+ 	(traverseproc)gen_traverse,		/* tp_traverse */
+ 	0,					/* tp_clear */
+	0,					/* tp_richcompare */
+	offsetof(PyGenObject, gi_weakreflist),	/* tp_weaklistoffset */
+	PyObject_SelfIter,			/* tp_iter */
+	(iternextfunc)gen_iternext,		/* tp_iternext */
+	gen_methods,				/* tp_methods */
+	gen_memberlist,				/* tp_members */
+	gen_getsetlist,				/* tp_getset */
+	0,					/* tp_base */
+	0,					/* tp_dict */
+
+	0,					/* tp_descr_get */
+	0,					/* tp_descr_set */
+	0,					/* tp_dictoffset */
+	0,					/* tp_init */
+	0,					/* tp_alloc */
+	0,					/* tp_new */
+	0,					/* tp_free */
+	0,					/* tp_is_gc */
+	0,					/* tp_bases */
+	0,					/* tp_mro */
+	0,					/* tp_cache */
+	0,					/* tp_subclasses */
+	0,					/* tp_weaklist */
+	gen_del,				/* tp_del */
+};
+
+PyObject *
+PyGen_New(PyFrameObject *f)
+{
+	PyGenObject *gen = PyObject_GC_New(PyGenObject, &PyGen_Type);
+	if (gen == NULL) {
+		Py_DECREF(f);
+		return NULL;
+	}
+	gen->gi_frame = f;
+	Py_INCREF(f->f_code);
+	gen->gi_code = (PyObject *)(f->f_code);
+	gen->gi_running = 0;
+	gen->gi_weakreflist = NULL;
+	_PyObject_GC_TRACK(gen);
+	return (PyObject *)gen;
+}
+
+int
+PyGen_NeedsFinalizing(PyGenObject *gen)
+{
+	int i;
+	PyFrameObject *f = gen->gi_frame;
+
+	if (f == NULL || f->f_stacktop == NULL || f->f_iblock <= 0)
+		return 0; /* no frame or empty blockstack == no finalization */
+
+	/* Any block type besides a loop requires cleanup. */
+	i = f->f_iblock;
+	while (--i >= 0) {
+		if (f->f_blockstack[i].b_type != SETUP_LOOP)
+			return 1;
+	}
+
+	/* No blocks except loops, it's safe to skip finalization. */
+	return 0;
+}