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gh-115754: Use Py_GetConstant(Py_CONSTANT_EMPTY_BYTES) #125195

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Oct 9, 2024
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4 changes: 2 additions & 2 deletions Modules/_ctypes/_ctypes.c
Original file line number Diff line number Diff line change
Expand Up @@ -4732,7 +4732,7 @@ Array_subscript(PyObject *myself, PyObject *item)
char *dest;

if (slicelen <= 0)
return PyBytes_FromStringAndSize("", 0);
return Py_GetConstant(Py_CONSTANT_EMPTY_BYTES);
if (step == 1) {
return PyBytes_FromStringAndSize(ptr + start,
slicelen);
Expand Down Expand Up @@ -5418,7 +5418,7 @@ Pointer_subscript(PyObject *myself, PyObject *item)
char *dest;

if (len <= 0)
return PyBytes_FromStringAndSize("", 0);
return Py_GetConstant(Py_CONSTANT_EMPTY_BYTES);
if (step == 1) {
return PyBytes_FromStringAndSize(ptr + start,
len);
Expand Down
2 changes: 1 addition & 1 deletion Modules/_io/textio.c
Original file line number Diff line number Diff line change
Expand Up @@ -559,7 +559,7 @@ _io_IncrementalNewlineDecoder_getstate_impl(nldecoder_object *self)
Py_DECREF(state);
}
else {
buffer = PyBytes_FromString("");
buffer = Py_GetConstant(Py_CONSTANT_EMPTY_BYTES);
flag = 0;
}
flag <<= 1;
Expand Down
4 changes: 2 additions & 2 deletions Modules/mmapmodule.c
Original file line number Diff line number Diff line change
Expand Up @@ -486,7 +486,7 @@ mmap_read_line_method(mmap_object *self,

remaining = (self->pos < self->size) ? self->size - self->pos : 0;
if (!remaining)
return PyBytes_FromString("");
return Py_GetConstant(Py_CONSTANT_EMPTY_BYTES);
start = self->data + self->pos;

if (safe_memchr(&eol, start, '\n', remaining) < 0) {
Expand Down Expand Up @@ -1274,7 +1274,7 @@ mmap_subscript(mmap_object *self, PyObject *item)

CHECK_VALID(NULL);
if (slicelen <= 0)
return PyBytes_FromStringAndSize("", 0);
return Py_GetConstant(Py_CONSTANT_EMPTY_BYTES);
else if (step == 1)
return _safe_PyBytes_FromStringAndSize(self->data + start, slicelen);
else {
Expand Down
4 changes: 2 additions & 2 deletions Modules/zlibmodule.c
Original file line number Diff line number Diff line change
Expand Up @@ -267,12 +267,12 @@ newcompobject(PyTypeObject *type)
self->eof = 0;
self->is_initialised = 0;
self->zdict = NULL;
self->unused_data = PyBytes_FromStringAndSize("", 0);
self->unused_data = Py_GetConstant(Py_CONSTANT_EMPTY_BYTES);
if (self->unused_data == NULL) {
Py_DECREF(self);
return NULL;
}
self->unconsumed_tail = PyBytes_FromStringAndSize("", 0);
self->unconsumed_tail = Py_GetConstant(Py_CONSTANT_EMPTY_BYTES);
if (self->unconsumed_tail == NULL) {
Py_DECREF(self);
return NULL;
Expand Down
2 changes: 1 addition & 1 deletion Objects/bytesobject.c
Original file line number Diff line number Diff line change
Expand Up @@ -1638,7 +1638,7 @@ bytes_subscript(PyObject *op, PyObject* item)
&stop, step);

if (slicelength <= 0) {
return PyBytes_FromStringAndSize("", 0);
return Py_GetConstant(Py_CONSTANT_EMPTY_BYTES);
}
else if (start == 0 && step == 1 &&
slicelength == PyBytes_GET_SIZE(self) &&
Expand Down
2 changes: 1 addition & 1 deletion Parser/action_helpers.c
Original file line number Diff line number Diff line change
Expand Up @@ -1541,7 +1541,7 @@ _PyPegen_concatenate_strings(Parser *p, asdl_expr_seq *strings,
}

if (bytes_found) {
PyObject* res = PyBytes_FromString("");
PyObject* res = Py_GetConstant(Py_CONSTANT_EMPTY_BYTES);

/* Bytes literals never get a kind, but just for consistency
since they are represented as Constant nodes, we'll mirror
Expand Down
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