bpo-29878: Add global instances of int for 0 and 1. (#852)

3 files changed, 7 insertions, 12 deletions

diff --git a/Modules/_io/_iomodule.c b/Modules/_io/_iomodule.c
index 5d804ec..0b795c8 100644
--- a/Modules/_io/_iomodule.c
+++ b/Modules/_io/_iomodule.c
@@ -53,7 +53,6 @@ PyObject *_PyIO_str_write;
 
 PyObject *_PyIO_empty_str;
 PyObject *_PyIO_empty_bytes;
-PyObject *_PyIO_zero;
 
 PyDoc_STRVAR(module_doc,
 "The io module provides the Python interfaces to stream handling. The\n"
@@ -790,9 +789,6 @@ PyInit__io(void)
     if (!_PyIO_empty_bytes &&
         !(_PyIO_empty_bytes = PyBytes_FromStringAndSize(NULL, 0)))
         goto fail;
-    if (!_PyIO_zero &&
-        !(_PyIO_zero = PyLong_FromLong(0L)))
-        goto fail;
 
     state->initialized = 1;
 
diff --git a/Modules/_io/_iomodule.h b/Modules/_io/_iomodule.h
index daaebd2..b5f0f57 100644
--- a/Modules/_io/_iomodule.h
+++ b/Modules/_io/_iomodule.h
@@ -183,6 +183,5 @@ extern PyObject *_PyIO_str_write;
 
 extern PyObject *_PyIO_empty_str;
 extern PyObject *_PyIO_empty_bytes;
-extern PyObject *_PyIO_zero;
 
 extern PyTypeObject _PyBytesIOBuffer_Type;
diff --git a/Modules/_io/textio.c b/Modules/_io/textio.c
index fce662a..0211ad9 100644
--- a/Modules/_io/textio.c
+++ b/Modules/_io/textio.c
@@ -1078,7 +1078,7 @@ _io_TextIOWrapper___init___impl(textio *self, PyObject *buffer,
         if (cookieObj == NULL)
             goto error;
 
-        cmp = PyObject_RichCompareBool(cookieObj, _PyIO_zero, Py_EQ);
+        cmp = PyObject_RichCompareBool(cookieObj, _PyLong_Zero, Py_EQ);
         Py_DECREF(cookieObj);
         if (cmp < 0) {
             goto error;
@@ -1087,7 +1087,7 @@ _io_TextIOWrapper___init___impl(textio *self, PyObject *buffer,
         if (cmp == 0) {
             self->encoding_start_of_stream = 0;
             res = PyObject_CallMethodObjArgs(self->encoder, _PyIO_str_setstate,
-                                             _PyIO_zero, NULL);
+                                             _PyLong_Zero, NULL);
             if (res == NULL)
                 goto error;
             Py_DECREF(res);
@@ -2030,7 +2030,7 @@ _textiowrapper_encoder_reset(textio *self, int start_of_stream)
     }
     else {
         res = PyObject_CallMethodObjArgs(self->encoder, _PyIO_str_setstate,
-                                         _PyIO_zero, NULL);
+                                         _PyLong_Zero, NULL);
         self->encoding_start_of_stream = 0;
     }
     if (res == NULL)
@@ -2075,7 +2075,7 @@ _io_TextIOWrapper_seek_impl(textio *self, PyObject *cookieObj, int whence)
 
     if (whence == 1) {
         /* seek relative to current position */
-        cmp = PyObject_RichCompareBool(cookieObj, _PyIO_zero, Py_EQ);
+        cmp = PyObject_RichCompareBool(cookieObj, _PyLong_Zero, Py_EQ);
         if (cmp < 0)
             goto fail;
 
@@ -2094,7 +2094,7 @@ _io_TextIOWrapper_seek_impl(textio *self, PyObject *cookieObj, int whence)
     }
     else if (whence == 2) {
         /* seek relative to end of file */
-        cmp = PyObject_RichCompareBool(cookieObj, _PyIO_zero, Py_EQ);
+        cmp = PyObject_RichCompareBool(cookieObj, _PyLong_Zero, Py_EQ);
         if (cmp < 0)
             goto fail;
 
@@ -2123,7 +2123,7 @@ _io_TextIOWrapper_seek_impl(textio *self, PyObject *cookieObj, int whence)
             goto fail;
         if (self->encoder) {
             /* If seek() == 0, we are at the start of stream, otherwise not */
-            cmp = PyObject_RichCompareBool(res, _PyIO_zero, Py_EQ);
+            cmp = PyObject_RichCompareBool(res, _PyLong_Zero, Py_EQ);
             if (cmp < 0 || _textiowrapper_encoder_reset(self, cmp)) {
                 Py_DECREF(res);
                 goto fail;
@@ -2137,7 +2137,7 @@ _io_TextIOWrapper_seek_impl(textio *self, PyObject *cookieObj, int whence)
         goto fail;
     }
 
-    cmp = PyObject_RichCompareBool(cookieObj, _PyIO_zero, Py_LT);
+    cmp = PyObject_RichCompareBool(cookieObj, _PyLong_Zero, Py_LT);
     if (cmp < 0)
         goto fail;