add circuitpython code

1 files changed, 213 insertions, 0 deletions

diff --git a/circuitpython/py/objslice.c b/circuitpython/py/objslice.c
new file mode 100644
index 0000000..142f62f
--- /dev/null
+++ b/circuitpython/py/objslice.c
@@ -0,0 +1,213 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * SPDX-FileCopyrightText: 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/obj.h"
+#include "py/runtime.h"
+
+#include "supervisor/shared/translate.h"
+
+/******************************************************************************/
+/* slice object                                                               */
+
+#if MICROPY_PY_BUILTINS_SLICE
+
+STATIC void slice_print(const mp_print_t *print, mp_obj_t o_in, mp_print_kind_t kind) {
+    (void)kind;
+    mp_obj_slice_t *o = MP_OBJ_TO_PTR(o_in);
+    mp_print_str(print, "slice(");
+    mp_obj_print_helper(print, o->start, PRINT_REPR);
+    mp_print_str(print, ", ");
+    mp_obj_print_helper(print, o->stop, PRINT_REPR);
+    mp_print_str(print, ", ");
+    mp_obj_print_helper(print, o->step, PRINT_REPR);
+    mp_print_str(print, ")");
+}
+
+#if MICROPY_PY_BUILTINS_SLICE_INDICES
+STATIC mp_obj_t slice_indices(mp_obj_t self_in, mp_obj_t length_obj) {
+    mp_int_t length = mp_obj_int_get_checked(length_obj);
+    mp_bound_slice_t bound_indices;
+    mp_obj_slice_indices(self_in, length, &bound_indices);
+
+    mp_obj_t results[3] = {
+        MP_OBJ_NEW_SMALL_INT(bound_indices.start),
+        MP_OBJ_NEW_SMALL_INT(bound_indices.stop),
+        MP_OBJ_NEW_SMALL_INT(bound_indices.step),
+    };
+    return mp_obj_new_tuple(3, results);
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_2(slice_indices_obj, slice_indices);
+#endif
+
+#if MICROPY_PY_BUILTINS_SLICE_ATTRS
+STATIC void slice_attr(mp_obj_t self_in, qstr attr, mp_obj_t *dest) {
+    if (dest[0] != MP_OBJ_NULL) {
+        // not load attribute
+        return;
+    }
+    mp_obj_slice_t *self = MP_OBJ_TO_PTR(self_in);
+
+    if (attr == MP_QSTR_start) {
+        dest[0] = self->start;
+    } else if (attr == MP_QSTR_stop) {
+        dest[0] = self->stop;
+    } else if (attr == MP_QSTR_step) {
+        dest[0] = self->step;
+    #if MICROPY_PY_BUILTINS_SLICE_INDICES
+    } else if (attr == MP_QSTR_indices) {
+        dest[0] = MP_OBJ_FROM_PTR(&slice_indices_obj);
+        dest[1] = self_in;
+    #endif
+    }
+}
+#endif
+
+#if MICROPY_PY_BUILTINS_SLICE_ATTRS
+STATIC mp_obj_t slice_make_new(const mp_obj_type_t *type,
+    size_t n_args, size_t n_kw, const mp_obj_t *args) {
+    if (type != &mp_type_slice) {
+        mp_raise_NotImplementedError(MP_ERROR_TEXT("Cannot subclass slice"));
+    }
+    // check number of arguments
+    mp_arg_check_num(n_args, n_kw, 1, 3, false);
+
+    // 1st argument is the pin
+    mp_obj_t start = mp_const_none;
+    mp_obj_t stop = mp_const_none;
+    mp_obj_t step = mp_const_none;
+    if (n_args == 1) {
+        stop = args[0];
+    } else {
+        start = args[0];
+        stop = args[1];
+        if (n_args == 3) {
+            step = args[2];
+        }
+    }
+
+    return mp_obj_new_slice(start, stop, step);
+}
+#endif
+
+#if MICROPY_PY_BUILTINS_SLICE_INDICES && !MICROPY_PY_BUILTINS_SLICE_ATTRS
+STATIC const mp_rom_map_elem_t slice_locals_dict_table[] = {
+    { MP_ROM_QSTR(MP_QSTR_indices), MP_ROM_PTR(&slice_indices_obj) },
+};
+STATIC MP_DEFINE_CONST_DICT(slice_locals_dict, slice_locals_dict_table);
+#endif
+
+const mp_obj_type_t mp_type_slice = {
+    { &mp_type_type },
+    .name = MP_QSTR_slice,
+    .print = slice_print,
+    #if MICROPY_PY_BUILTINS_SLICE_INDICES || MICROPY_PY_BUILTINS_SLICE_ATTRS
+    .make_new = slice_make_new,
+    #endif
+    #if MICROPY_PY_BUILTINS_SLICE_ATTRS
+    .attr = slice_attr,
+    #elif MICROPY_PY_BUILTINS_SLICE_INDICES
+    .locals_dict = (mp_obj_dict_t *)&slice_locals_dict,
+    #endif
+};
+
+mp_obj_t mp_obj_new_slice(mp_obj_t ostart, mp_obj_t ostop, mp_obj_t ostep) {
+    mp_obj_slice_t *o = m_new_obj(mp_obj_slice_t);
+    o->base.type = &mp_type_slice;
+    o->start = ostart;
+    o->stop = ostop;
+    o->step = ostep;
+    return MP_OBJ_FROM_PTR(o);
+}
+
+// Return the real index and step values for a slice when applied to a sequence of
+// the given length, resolving missing components, negative values and values off
+// the end of the sequence.
+void mp_obj_slice_indices(mp_obj_t self_in, mp_int_t length, mp_bound_slice_t *result) {
+    mp_obj_slice_t *self = MP_OBJ_TO_PTR(self_in);
+    mp_int_t start, stop, step;
+
+    if (self->step == mp_const_none) {
+        step = 1;
+    } else {
+        step = mp_obj_get_int(self->step);
+        if (step == 0) {
+            mp_raise_ValueError(MP_ERROR_TEXT("slice step cannot be zero"));
+        }
+    }
+
+    if (step > 0) {
+        // Positive step
+        if (self->start == mp_const_none) {
+            start = 0;
+        } else {
+            start = mp_obj_get_int(self->start);
+            if (start < 0) {
+                start += length;
+            }
+            start = MIN(length, MAX(start, 0));
+        }
+
+        if (self->stop == mp_const_none) {
+            stop = length;
+        } else {
+            stop = mp_obj_get_int(self->stop);
+            if (stop < 0) {
+                stop += length;
+            }
+            stop = MIN(length, MAX(stop, 0));
+        }
+    } else {
+        // Negative step
+        if (self->start == mp_const_none) {
+            start = length - 1;
+        } else {
+            start = mp_obj_get_int(self->start);
+            if (start < 0) {
+                start += length;
+            }
+            start = MIN(length - 1, MAX(start, -1));
+        }
+
+        if (self->stop == mp_const_none) {
+            stop = -1;
+        } else {
+            stop = mp_obj_get_int(self->stop);
+            if (stop < 0) {
+                stop += length;
+            }
+            stop = MIN(length - 1, MAX(stop, -1));
+        }
+    }
+
+    result->start = start;
+    result->stop = stop;
+    result->step = step;
+}
+
+#endif