gh-99845: Use size_t type in __sizeof__() methods (#99846)

The implementation of __sizeof__() methods using _PyObject_SIZE() now
use an unsigned type (size_t) to compute the size, rather than a signed
type (Py_ssize_t).

Cast explicitly signed (Py_ssize_t) values to unsigned type
(Py_ssize_t).

1 files changed, 5 insertions, 6 deletions

diff --git a/Modules/_io/bufferedio.c b/Modules/_io/bufferedio.c
index e261093..6df55b5 100644
--- a/Modules/_io/bufferedio.c
+++ b/Modules/_io/bufferedio.c
@@ -389,12 +389,11 @@ buffered_dealloc(buffered *self)
 static PyObject *
 buffered_sizeof(buffered *self, PyObject *Py_UNUSED(ignored))
 {
-    Py_ssize_t res;
-
-    res = _PyObject_SIZE(Py_TYPE(self));
-    if (self->buffer)
-        res += self->buffer_size;
-    return PyLong_FromSsize_t(res);
+    size_t res = _PyObject_SIZE(Py_TYPE(self));
+    if (self->buffer) {
+        res += (size_t)self->buffer_size;
+    }
+    return PyLong_FromSize_t(res);
 }
 
 static int