1 files changed, 133 insertions, 0 deletions
diff --git a/py/objtuple.c b/py/objtuple.c
new file mode 100644
index 0000000000..b98d6ede7b
--- /dev/null
+++ b/py/objtuple.c
@@ -0,0 +1,133 @@
+#include <stdlib.h>
+#include <stdint.h>
+//#include <string.h>
+#include <assert.h>
+
+#include "nlr.h"
+#include "misc.h"
+#include "mpconfig.h"
+#include "obj.h"
+#include "runtime0.h"
+
+typedef struct _mp_obj_tuple_t {
+    mp_obj_base_t base;
+    machine_uint_t len;
+    mp_obj_t items[];
+} mp_obj_tuple_t;
+
+static mp_obj_t mp_obj_new_tuple_iterator(mp_obj_tuple_t *tuple, int cur);
+
+/******************************************************************************/
+/* tuple                                                                      */
+
+void tuple_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t o_in) {
+    mp_obj_tuple_t *o = o_in;
+    print(env, "(");
+    for (int i = 0; i < o->len; i++) {
+        if (i > 0) {
+            print(env, ", ");
+        }
+        mp_obj_print_helper(print, env, o->items[i]);
+    }
+    if (o->len == 1) {
+        print(env, ",");
+    }
+    print(env, ")");
+}
+
+mp_obj_t tuple_binary_op(int op, mp_obj_t lhs, mp_obj_t rhs) {
+    mp_obj_tuple_t *o = lhs;
+    switch (op) {
+        case RT_BINARY_OP_SUBSCR:
+        {
+            // tuple load
+            uint index = mp_get_index(o->base.type, o->len, rhs);
+            return o->items[index];
+        }
+        default:
+            // op not supported
+            return NULL;
+    }
+}
+
+mp_obj_t tuple_getiter(mp_obj_t o_in) {
+    return mp_obj_new_tuple_iterator(o_in, 0);
+}
+
+void mp_obj_tuple_get(mp_obj_t self_in, uint *len, mp_obj_t **items) {
+    mp_obj_tuple_t *self = self_in;
+    *len = self->len;
+    *items = &self->items[0];
+}
+
+const mp_obj_type_t tuple_type = {
+    { &mp_const_type },
+    "tuple",
+    tuple_print, // print
+    NULL, // call_n
+    NULL, // unary_op
+    tuple_binary_op, // binary_op
+    tuple_getiter, // getiter
+    NULL, // iternext
+    {{NULL, NULL},}, // method list
+};
+
+mp_obj_t mp_obj_new_tuple(uint n, mp_obj_t *items) {
+    mp_obj_tuple_t *o = m_new_obj_var(mp_obj_tuple_t, mp_obj_t, n);
+    o->base.type = &tuple_type;
+    o->len = n;
+    for (int i = 0; i < n; i++) {
+        o->items[i] = items[i];
+    }
+    return o;
+}
+
+mp_obj_t mp_obj_new_tuple_reverse(uint n, mp_obj_t *items) {
+    mp_obj_tuple_t *o = m_new_obj_var(mp_obj_tuple_t, mp_obj_t, n);
+    o->base.type = &tuple_type;
+    o->len = n;
+    for (int i = 0; i < n; i++) {
+        o->items[i] = items[n - i - 1];
+    }
+    return o;
+}
+
+/******************************************************************************/
+/* tuple iterator                                                             */
+
+typedef struct _mp_obj_tuple_it_t {
+    mp_obj_base_t base;
+    mp_obj_tuple_t *tuple;
+    machine_uint_t cur;
+} mp_obj_tuple_it_t;
+
+mp_obj_t tuple_it_iternext(mp_obj_t self_in) {
+    mp_obj_tuple_it_t *self = self_in;
+    if (self->cur < self->tuple->len) {
+        mp_obj_t o_out = self->tuple->items[self->cur];
+        self->cur += 1;
+        return o_out;
+    } else {
+        return mp_const_stop_iteration;
+    }
+}
+
+static const mp_obj_type_t tuple_it_type = {
+    { &mp_const_type },
+    "tuple_iterator",
+    NULL, // print
+    NULL, // call_n
+    NULL, // unary_op
+    NULL, // binary_op
+    NULL, // getiter
+    tuple_it_iternext,
+    {{NULL, NULL},}, // method list
+};
+
+static mp_obj_t mp_obj_new_tuple_iterator(mp_obj_tuple_t *tuple, int cur) {
+    mp_obj_tuple_it_t *o = m_new_obj(mp_obj_tuple_it_t);
+    o->base.type = &tuple_it_type;
+    o->tuple = tuple;
+    o->cur = cur;
+    return o;
+}