From ebcc578dff47b1dcffb634923bedc5361c8f29f6 Mon Sep 17 00:00:00 2001
From: Victor Stinner <vstinner@python.org>
Date: Fri, 25 Oct 2024 11:14:52 +0200
Subject: [PATCH] gh-115754: Use Py_GetConstant(Py_CONSTANT_EMPTY_STR)
 (#125583)

Replace PyUnicode_FromStringAndSize(NULL, 0)
with Py_GetConstant(Py_CONSTANT_EMPTY_STR).
---
 Modules/_datetimemodule.c | 2 +-
 Modules/_io/textio.c      | 2 +-
 Modules/getpath.c         | 6 +++---
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/Modules/_datetimemodule.c b/Modules/_datetimemodule.c
index e1bb98fcf05..b1102984cb5 100644
--- a/Modules/_datetimemodule.c
+++ b/Modules/_datetimemodule.c
@@ -1766,7 +1766,7 @@ make_Zreplacement(PyObject *object, PyObject *tzinfoarg)
 {
     PyObject *temp;
     PyObject *tzinfo = get_tzinfo_member(object);
-    PyObject *Zreplacement = PyUnicode_FromStringAndSize(NULL, 0);
+    PyObject *Zreplacement = Py_GetConstant(Py_CONSTANT_EMPTY_STR);
 
     if (Zreplacement == NULL)
         return NULL;
diff --git a/Modules/_io/textio.c b/Modules/_io/textio.c
index 68d16361962..0d851ee2115 100644
--- a/Modules/_io/textio.c
+++ b/Modules/_io/textio.c
@@ -1806,7 +1806,7 @@ textiowrapper_get_decoded_chars(textio *self, Py_ssize_t n)
     Py_ssize_t avail;
 
     if (self->decoded_chars == NULL)
-        return PyUnicode_FromStringAndSize(NULL, 0);
+        return Py_GetConstant(Py_CONSTANT_EMPTY_STR);
 
     /* decoded_chars is guaranteed to be "ready". */
     avail = (PyUnicode_GET_LENGTH(self->decoded_chars)
diff --git a/Modules/getpath.c b/Modules/getpath.c
index d0128b20fae..18ddfaf8dbc 100644
--- a/Modules/getpath.c
+++ b/Modules/getpath.c
@@ -108,7 +108,7 @@ getpath_dirname(PyObject *Py_UNUSED(self), PyObject *args)
     Py_ssize_t end = PyUnicode_GET_LENGTH(path);
     Py_ssize_t pos = PyUnicode_FindChar(path, SEP, 0, end, -1);
     if (pos < 0) {
-        return PyUnicode_FromStringAndSize(NULL, 0);
+        return Py_GetConstant(Py_CONSTANT_EMPTY_STR);
     }
     return PyUnicode_Substring(path, 0, pos);
 }
@@ -258,7 +258,7 @@ getpath_joinpath(PyObject *Py_UNUSED(self), PyObject *args)
     }
     Py_ssize_t n = PyTuple_GET_SIZE(args);
     if (n == 0) {
-        return PyUnicode_FromStringAndSize(NULL, 0);
+        return Py_GetConstant(Py_CONSTANT_EMPTY_STR);
     }
     /* Convert all parts to wchar and accumulate max final length */
     wchar_t **parts = (wchar_t **)PyMem_Malloc(n * sizeof(wchar_t *));
@@ -302,7 +302,7 @@ getpath_joinpath(PyObject *Py_UNUSED(self), PyObject *args)
             PyErr_NoMemory();
             return NULL;
         }
-        return PyUnicode_FromStringAndSize(NULL, 0);
+        return Py_GetConstant(Py_CONSTANT_EMPTY_STR);
     }
 
     final[0] = '\0';