Diff: py/objenumerate.c

Revision:

0:5868e8752d44

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/py/objenumerate.c	Sat Apr 16 17:11:56 2016 +0000
@@ -0,0 +1,92 @@
+/*
+ * This file is part of the Micro Python project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2013, 2014 Damien P. George
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <stdlib.h>
+#include <assert.h>
+
+#include "py/runtime.h"
+
+#if MICROPY_PY_BUILTINS_ENUMERATE
+
+typedef struct _mp_obj_enumerate_t {
+    mp_obj_base_t base;
+    mp_obj_t iter;
+    mp_int_t cur;
+} mp_obj_enumerate_t;
+
+STATIC mp_obj_t enumerate_iternext(mp_obj_t self_in);
+
+STATIC mp_obj_t enumerate_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
+#if MICROPY_CPYTHON_COMPAT
+    static const mp_arg_t allowed_args[] = {
+        { MP_QSTR_iterable, MP_ARG_REQUIRED | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
+        { MP_QSTR_start, MP_ARG_INT, {.u_int = 0} },
+    };
+
+    // parse args
+    struct {
+        mp_arg_val_t iterable, start;
+    } arg_vals;
+    mp_arg_parse_all_kw_array(n_args, n_kw, args,
+        MP_ARRAY_SIZE(allowed_args), allowed_args, (mp_arg_val_t*)&arg_vals);
+
+    // create enumerate object
+    mp_obj_enumerate_t *o = m_new_obj(mp_obj_enumerate_t);
+    o->base.type = type;
+    o->iter = mp_getiter(arg_vals.iterable.u_obj);
+    o->cur = arg_vals.start.u_int;
+#else
+    (void)n_kw;
+    mp_obj_enumerate_t *o = m_new_obj(mp_obj_enumerate_t);
+    o->base.type = type;
+    o->iter = mp_getiter(args[0]);
+    o->cur = n_args > 1 ? mp_obj_get_int(args[1]) : 0;
+#endif
+
+    return MP_OBJ_FROM_PTR(o);
+}
+
+const mp_obj_type_t mp_type_enumerate = {
+    { &mp_type_type },
+    .name = MP_QSTR_enumerate,
+    .make_new = enumerate_make_new,
+    .iternext = enumerate_iternext,
+    .getiter = mp_identity,
+};
+
+STATIC mp_obj_t enumerate_iternext(mp_obj_t self_in) {
+    assert(MP_OBJ_IS_TYPE(self_in, &mp_type_enumerate));
+    mp_obj_enumerate_t *self = MP_OBJ_TO_PTR(self_in);
+    mp_obj_t next = mp_iternext(self->iter);
+    if (next == MP_OBJ_STOP_ITERATION) {
+        return MP_OBJ_STOP_ITERATION;
+    } else {
+        mp_obj_t items[] = {MP_OBJ_NEW_SMALL_INT(self->cur++), next};
+        return mp_obj_new_tuple(2, items);
+    }
+}
+
+#endif // MICROPY_PY_BUILTINS_ENUMERATE