Implement tree-shaking for Python sources

third_party/python/Objects/fromfd.c

@@ -0,0 +1,34 @@
+/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:4;tab-width:8;coding:utf-8 -*-│
+│vi: set net ft=c ts=4 sts=4 sw=4 fenc=utf-8                                :vi│
+╞══════════════════════════════════════════════════════════════════════════════╡
+│ Python 3                                                                     │
+│ https://docs.python.org/3/license.html                                       │
+╚─────────────────────────────────────────────────────────────────────────────*/
+#include "third_party/python/Include/abstract.h"
+#include "third_party/python/Include/import.h"
+#include "third_party/python/Include/object.h"
+#include "third_party/python/Include/yoink.h"
+/* clang-format off */
+
+PYTHON_YOINK("io");
+
+PyObject *
+PyFile_FromFd(int fd, const char *name, const char *mode, int buffering,
+              const char *encoding, const char *errors, const char *newline,
+              int closefd)
+{
+    PyObject *io, *stream;
+    _Py_IDENTIFIER(open);
+    io = PyImport_ImportModule("io");
+    if (io == NULL)
+        return NULL;
+    stream = _PyObject_CallMethodId(io, &PyId_open, "isisssi", fd, mode,
+                                    buffering, encoding, errors,
+                                    newline, closefd);
+    Py_DECREF(io);
+    if (stream == NULL)
+        return NULL;
+    /* ignore name attribute because the name attribute of _BufferedIOMixin
+       and TextIOWrapper is read only */
+    return stream;
+}