Don't pass "()" format to PyObject_CallXXX() to call a function without
argument: pass NULL as the format string instead. It avoids to have to parse a
string to produce 0 argument.
Other changes:
* Rewrite _Py_normalize_encoding() as a C implementation of
encodings.normalize_encoding(). For example, " utf-8 " is now normalized to
"utf_8". So the fast path is now used for more name variants of the same
encoding.
* Avoid strcpy() when encoding is NULL: call directly the UTF-8 codec
Issue #27841: Add _PyObject_Call_Prepend() helper function to prepend an
argument to existing arguments to call a function. This helper uses fast calls.
Modify method_call() and slot_tp_new() to use _PyObject_Call_Prepend().
Issue #27830: Similar to _PyObject_FastCallDict(), but keyword arguments are
also passed in the same C array than positional arguments, rather than being
passed as a Python dict.
Issue #27809:
* PyObject_CallMethodObjArgs(), _PyObject_CallMethodIdObjArgs() and
PyObject_CallFunctionObjArgs() now use fast call to avoid the creation of a
temporary tuple
* Rename objargs_mktuple() to objargs_mkstack()
* objargs_mkstack() now stores objects in a C array using borrowed references,
instead of storing arguments into a tuple
objargs_mkstack() uses a small buffer allocated on the C stack for 5 arguments
or less, or allocates a buffer in the heap memory.
Note: this change is different than the change 0e4f26083bbb, I fixed the test
to decide if the small stack can be used or not. sizeof(PyObject**) was also
replaced with sizeof(stack[0]) since the sizeof() was wrong (but gave the same
result).
Issue #27809:
* PyObject_CallMethodObjArgs(), _PyObject_CallMethodIdObjArgs() and
PyObject_CallFunctionObjArgs() now use fast call to avoid the creation of a
temporary tuple
* Rename objargs_mktuple() to objargs_mkstack()
* objargs_mkstack() now stores objects in a C array using borrowed references,
instead of storing arguments into a tuple
objargs_mkstack() uses a small buffer allocated on the C stack for 5 arguments
or less, or allocates a buffer in the heap memory.
Multi-phase extension module import now correctly allows the
``m_methods`` field to be used to add module level functions
to instances of non-module types returned from ``Py_create_mod``.
Patch by Xiang Zhang.
Issue #27128: calliter_iternext() now calls _PyObject_FastCall() to avoid a
temporary empty tuple.
Cleanup also the code to reduce the indentation level.
* Invert condition of test to avoid levels of indentation
* Remove useless Py_XDECREF(args) in the error block
* Replace Py_XDECREF(func) with Py_DECREF(func) in the error block: func cannot
be NULL when reaching the error block
Issue #27128. The call_method() and call_maybe() functions of typeobject.c now
use fast call for empty format string to avoid the creation of a temporary
empty tuple.
Victor Stinner
Benjamin Peterson
Eric Snow
Mark Dickinson
Raymond Hettinger
Martin Panter
Serhiy Storchaka
Nick Coghlan