startswith and endswith don't accept None as slice index. Patch by Torsten Becker. (closes #11828)
diff --git a/Objects/stringlib/find.h b/Objects/stringlib/find.h
index f915296c..ce615dc 100644
--- a/Objects/stringlib/find.h
+++ b/Objects/stringlib/find.h
@@ -93,32 +93,33 @@
#endif /* STRINGLIB_WANT_CONTAINS_OBJ */
-#if STRINGLIB_IS_UNICODE
-
/*
This function is a helper for the "find" family (find, rfind, index,
-rindex) of unicodeobject.c file, because they all have the same
-behaviour for the arguments.
+rindex) and for count, startswith and endswith, because they all have
+the same behaviour for the arguments.
It does not touch the variables received until it knows everything
is ok.
-
-Note that we receive a pointer to the pointer of the substring object,
-so when we create that object in this function we don't DECREF it,
-because it continues living in the caller functions (those functions,
-after finishing using the substring, must DECREF it).
*/
+#define FORMAT_BUFFER_SIZE 50
+
Py_LOCAL_INLINE(int)
-_ParseTupleFinds (PyObject *args, PyObject **substring,
- Py_ssize_t *start, Py_ssize_t *end) {
- PyObject *tmp_substring;
+stringlib_parse_args_finds(const char * function_name, PyObject *args,
+ PyObject **subobj,
+ Py_ssize_t *start, Py_ssize_t *end)
+{
+ PyObject *tmp_subobj;
Py_ssize_t tmp_start = 0;
Py_ssize_t tmp_end = PY_SSIZE_T_MAX;
PyObject *obj_start=Py_None, *obj_end=Py_None;
+ char format[FORMAT_BUFFER_SIZE] = "O|OO:";
+ size_t len = strlen(format);
- if (!PyArg_ParseTuple(args, "O|OO:find", &tmp_substring,
- &obj_start, &obj_end))
+ strncpy(format + len, function_name, FORMAT_BUFFER_SIZE - len - 1);
+ format[FORMAT_BUFFER_SIZE - 1] = '\0';
+
+ if (!PyArg_ParseTuple(args, format, &tmp_subobj, &obj_start, &obj_end))
return 0;
/* To support None in "start" and "end" arguments, meaning
@@ -131,16 +132,44 @@
if (!_PyEval_SliceIndex(obj_end, &tmp_end))
return 0;
- tmp_substring = PyUnicode_FromObject(tmp_substring);
- if (!tmp_substring)
- return 0;
-
*start = tmp_start;
*end = tmp_end;
- *substring = tmp_substring;
+ *subobj = tmp_subobj;
return 1;
}
+#undef FORMAT_BUFFER_SIZE
+
+#if STRINGLIB_IS_UNICODE
+
+/*
+Wraps stringlib_parse_args_finds() and additionally ensures that the
+first argument is a unicode object.
+
+Note that we receive a pointer to the pointer of the substring object,
+so when we create that object in this function we don't DECREF it,
+because it continues living in the caller functions (those functions,
+after finishing using the substring, must DECREF it).
+*/
+
+Py_LOCAL_INLINE(int)
+stringlib_parse_args_finds_unicode(const char * function_name, PyObject *args,
+ PyUnicodeObject **substring,
+ Py_ssize_t *start, Py_ssize_t *end)
+{
+ PyObject *tmp_substring;
+
+ if(stringlib_parse_args_finds(function_name, args, &tmp_substring,
+ start, end)) {
+ tmp_substring = PyUnicode_FromObject(tmp_substring);
+ if (!tmp_substring)
+ return 0;
+ *substring = (PyUnicodeObject *)tmp_substring;
+ return 1;
+ }
+ return 0;
+}
+
#endif /* STRINGLIB_IS_UNICODE */
#endif /* STRINGLIB_FIND_H */