Make VM stack grow upwards, and so no reversed args arrays.

Change state layout in VM so the stack starts at state[0] and grows
upwards.  Locals are at the top end of the state and number downwards.
This cleans up a lot of the interface connecting the VM to C: now all
functions that take an array of Micro Python objects are in order (ie no
longer in reverse).

Also clean up C API with keyword arguments (call_n and call_n_kw
replaced with single call method that takes keyword arguments).  And now
make_new takes keyword arguments.

emitnative.c has not yet been changed to comply with the new order of
stack layout.

1 files changed, 3 insertions, 3 deletions

diff --git a/unix/file.c b/unix/file.c
index e15e82775c..9b8c822520 100644
--- a/unix/file.c
+++ b/unix/file.c
@@ -45,7 +45,7 @@ static mp_obj_t fdfile_close(mp_obj_t self_in) {
 }
 static MP_DEFINE_CONST_FUN_OBJ_1(fdfile_close_obj, fdfile_close);
 
-static mp_obj_t fdfile_make_new(mp_obj_t type_in, int n_args, const mp_obj_t *args) {
+static mp_obj_t fdfile_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp_obj_t *args) {
     mp_obj_fdfile_t *o = m_new_obj(mp_obj_fdfile_t);
     o->base.type = type_in;
 
@@ -112,8 +112,8 @@ static const mp_obj_type_t rawfile_type = {
 };
 
 // Factory function for I/O stream classes
-mp_obj_t mp_builtin_open(int n_args, const mp_obj_t *args) {
+mp_obj_t mp_builtin_open(uint n_args, uint n_kw, const mp_obj_t *args) {
     // TODO: analyze mode and buffering args and instantiate appropriate type
-    return fdfile_make_new((mp_obj_t)&rawfile_type, n_args, args);
+    return fdfile_make_new((mp_obj_t)&rawfile_type, n_args, 0, args);
 }
 MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_builtin_open_obj, 1, 2, mp_builtin_open);