Change object representation from 1 big union to individual structs.

A big change.  Micro Python objects are allocated as individual structs
with the first element being a pointer to the type information (which
is itself an object).  This scheme follows CPython.  Much more flexible,
not necessarily slower, uses same heap memory, and can allocate objects
statically.

Also change name prefix, from py_ to mp_ (mp for Micro Python).

1 files changed, 54 insertions, 0 deletions

diff --git a/py/objboundmeth.c b/py/objboundmeth.c
new file mode 100644
index 000000000..8bd238c65
--- /dev/null
+++ b/py/objboundmeth.c
@@ -0,0 +1,54 @@
+#include <stdlib.h>
+#include <stdint.h>
+#include <assert.h>
+
+#include "nlr.h"
+#include "misc.h"
+#include "mpconfig.h"
+#include "obj.h"
+#include "runtime.h"
+
+typedef struct _mp_obj_bound_meth_t {
+    mp_obj_base_t base;
+    mp_obj_t meth;
+    mp_obj_t self;
+} mp_obj_bound_meth_t;
+
+// args are in reverse order in the array
+mp_obj_t bound_meth_call_n(mp_obj_t self_in, int n_args, const mp_obj_t *args) {
+    mp_obj_bound_meth_t *self = self_in;
+
+    if (n_args == 0) {
+        return rt_call_function_n(self->meth, 1, &self->self);
+    } else if (n_args == 1) {
+        mp_obj_t args2[2];
+        args2[1] = self->self;
+        args2[0] = args[0];
+        return rt_call_function_n(self->meth, 2, args2);
+    } else {
+        // TODO not implemented
+        assert(0);
+        return mp_const_none;
+        //return rt_call_function_2(self->meth, n_args + 1, self->self + args);
+    }
+}
+
+const mp_obj_type_t bound_meth_type = {
+    { &mp_const_type },
+    "bound_method",
+    NULL, // print
+    bound_meth_call_n, // call_n
+    NULL, // unary_op
+    NULL, // binary_op
+    NULL, // getiter
+    NULL, // iternext
+    {{NULL, NULL},}, // method list
+};
+
+mp_obj_t mp_obj_new_bound_meth(mp_obj_t self, mp_obj_t meth) {
+    mp_obj_bound_meth_t *o = m_new_obj(mp_obj_bound_meth_t);
+    o->base.type = &bound_meth_type;
+    o->meth = meth;
+    o->self = self;
+    return o;
+}