py: Replace stream_p with *stream_p in mp_obj_type_t.

This is to reduce ROM usage.  stream_p is used in file and socket types
only (at the moment), so seems a good idea to make the protocol
functions a pointer instead of the actual structure.

It saves 308 bytes of ROM in the stmhal/ port, 928 in unix/.

1 files changed, 6 insertions, 4 deletions

diff --git a/unix/file.c b/unix/file.c
index 780e84718..2cc17dfd3 100644
--- a/unix/file.c
+++ b/unix/file.c
@@ -123,6 +123,11 @@ STATIC const mp_map_elem_t rawfile_locals_dict_table[] = {
 
 STATIC MP_DEFINE_CONST_DICT(rawfile_locals_dict, rawfile_locals_dict_table);
 
+STATIC const mp_stream_p_t rawfile_stream_p = {
+    .read = fdfile_read,
+    .write = fdfile_write,
+};
+
 STATIC const mp_obj_type_t rawfile_type = {
     { &mp_type_type },
     .name = MP_QSTR_io_dot_FileIO,
@@ -130,10 +135,7 @@ STATIC const mp_obj_type_t rawfile_type = {
     .make_new = fdfile_make_new,
     .getiter = mp_identity,
     .iternext = mp_stream_unbuffered_iter,
-    .stream_p = {
-        .read = fdfile_read,
-        .write = fdfile_write,
-    },
+    .stream_p = &rawfile_stream_p,
     .locals_dict = (mp_obj_t)&rawfile_locals_dict,
 };