If MS_WIN64 is defined, MS_WINDOWS is also defined: #ifdef can be simplified.
diff --git a/Modules/_io/_iomodule.h b/Modules/_io/_iomodule.h
index 0fe90a3..ad1faa8 100644
--- a/Modules/_io/_iomodule.h
+++ b/Modules/_io/_iomodule.h
@@ -77,7 +77,7 @@
long with "%lld" even when both long and long long have the same
precision. */
-#if defined(MS_WIN64) || defined(MS_WINDOWS)
+#ifdef MS_WINDOWS
/* Windows uses long long for offsets */
typedef PY_LONG_LONG Py_off_t;
diff --git a/Modules/_io/fileio.c b/Modules/_io/fileio.c
index 34a5801..efcc594 100644
--- a/Modules/_io/fileio.c
+++ b/Modules/_io/fileio.c
@@ -533,7 +533,7 @@
len = pbuf.len;
Py_BEGIN_ALLOW_THREADS
errno = 0;
-#if defined(MS_WIN64) || defined(MS_WINDOWS)
+#ifdef MS_WINDOWS
if (len > INT_MAX)
len = INT_MAX;
n = read(self->fd, pbuf.buf, (int)len);
@@ -602,7 +602,7 @@
if (!_PyVerify_fd(self->fd))
return PyErr_SetFromErrno(PyExc_IOError);
-#if defined(MS_WIN64) || defined(MS_WINDOWS)
+#ifdef MS_WINDOWS
pos = _lseeki64(self->fd, 0L, SEEK_CUR);
#else
pos = lseek(self->fd, 0L, SEEK_CUR);
@@ -645,7 +645,7 @@
Py_BEGIN_ALLOW_THREADS
errno = 0;
n = bufsize - bytes_read;
-#if defined(MS_WIN64) || defined(MS_WINDOWS)
+#ifdef MS_WINDOWS
if (n > INT_MAX)
n = INT_MAX;
n = read(self->fd, PyBytes_AS_STRING(result) + bytes_read, (int)n);
@@ -706,7 +706,7 @@
return fileio_readall(self);
}
-#if defined(MS_WIN64) || defined(MS_WINDOWS)
+#ifdef MS_WINDOWS
if (size > INT_MAX)
size = INT_MAX;
#endif
@@ -718,7 +718,7 @@
if (_PyVerify_fd(self->fd)) {
Py_BEGIN_ALLOW_THREADS
errno = 0;
-#if defined(MS_WIN64) || defined(MS_WINDOWS)
+#ifdef MS_WINDOWS
n = read(self->fd, ptr, (int)size);
#else
n = read(self->fd, ptr, size);
@@ -766,7 +766,7 @@
Py_BEGIN_ALLOW_THREADS
errno = 0;
len = pbuf.len;
-#if defined(MS_WIN64) || defined(MS_WINDOWS)
+#ifdef MS_WINDOWS
if (len > 32767 && isatty(self->fd)) {
/* Issue #11395: the Windows console returns an error (12: not
enough space error) on writing into stdout if stdout mode is
@@ -839,7 +839,7 @@
if (_PyVerify_fd(fd)) {
Py_BEGIN_ALLOW_THREADS
-#if defined(MS_WIN64) || defined(MS_WINDOWS)
+#ifdef MS_WINDOWS
res = _lseeki64(fd, pos, whence);
#else
res = lseek(fd, pos, whence);
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index baad299..fd4628c 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -361,7 +361,7 @@
#undef STAT
#undef FSTAT
#undef STRUCT_STAT
-#if defined(MS_WIN64) || defined(MS_WINDOWS)
+#ifdef MS_WINDOWS
# define STAT win32_stat
# define LSTAT win32_lstat
# define FSTAT win32_fstat
@@ -7425,7 +7425,7 @@
posix_lseek(PyObject *self, PyObject *args)
{
int fd, how;
-#if defined(MS_WIN64) || defined(MS_WINDOWS)
+#ifdef MS_WINDOWS
PY_LONG_LONG pos, res;
#else
off_t pos, res;
@@ -7453,7 +7453,7 @@
if (!_PyVerify_fd(fd))
return posix_error();
Py_BEGIN_ALLOW_THREADS
-#if defined(MS_WIN64) || defined(MS_WINDOWS)
+#ifdef MS_WINDOWS
res = _lseeki64(fd, pos, how);
#else
res = lseek(fd, pos, how);
@@ -7659,7 +7659,7 @@
}
len = pbuf.len;
Py_BEGIN_ALLOW_THREADS
-#if defined(MS_WIN64) || defined(MS_WINDOWS)
+#ifdef MS_WINDOWS
if (len > INT_MAX)
len = INT_MAX;
size = write(fd, pbuf.buf, (int)len);
diff --git a/Modules/socketmodule.c b/Modules/socketmodule.c
index bd0a20a..0fd14ab 100644
--- a/Modules/socketmodule.c
+++ b/Modules/socketmodule.c
@@ -2553,7 +2553,7 @@
Py_BEGIN_ALLOW_THREADS
timeout = internal_select_ex(s, 0, interval);
if (!timeout) {
-#if defined(MS_WIN64) || defined(MS_WINDOWS)
+#ifdef MS_WINDOWS
if (len > INT_MAX)
len = INT_MAX;
outlen = recv(s->sock_fd, cbuf, (int)len, flags);
@@ -3251,7 +3251,7 @@
if (!timeout) {
#ifdef __VMS
n = sendsegmented(s->sock_fd, buf, len, flags);
-#elif defined(MS_WIN64) || defined(MS_WINDOWS)
+#elif defined(MS_WINDOWS)
if (len > INT_MAX)
len = INT_MAX;
n = send(s->sock_fd, buf, (int)len, flags);
@@ -3308,7 +3308,7 @@
if (!timeout) {
#ifdef __VMS
n = sendsegmented(s->sock_fd, buf, len, flags);
-#elif defined(MS_WIN64) || defined(MS_WINDOWS)
+#elif defined(MS_WINDOWS)
if (len > INT_MAX)
len = INT_MAX;
n = send(s->sock_fd, buf, (int)len, flags);
@@ -3407,7 +3407,7 @@
Py_BEGIN_ALLOW_THREADS
timeout = internal_select_ex(s, 1, interval);
if (!timeout) {
-#if defined(MS_WIN64) || defined(MS_WINDOWS)
+#ifdef MS_WINDOWS
if (len > INT_MAX)
len = INT_MAX;
n = sendto(s->sock_fd, buf, (int)len, flags,