add circuitpython code

1 files changed, 235 insertions, 0 deletions

diff --git a/circuitpython/py/objrange.c b/circuitpython/py/objrange.c
new file mode 100644
index 0000000..b23ab23
--- /dev/null
+++ b/circuitpython/py/objrange.c
@@ -0,0 +1,235 @@
+/*
+ * 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 "py/runtime.h"
+
+#include "supervisor/shared/translate.h"
+
+/******************************************************************************/
+/* range iterator                                                             */
+
+typedef struct _mp_obj_range_it_t {
+    mp_obj_base_t base;
+    // TODO make these values generic objects or something
+    mp_int_t cur;
+    mp_int_t stop;
+    mp_int_t step;
+} mp_obj_range_it_t;
+
+STATIC mp_obj_t range_it_iternext(mp_obj_t o_in) {
+    mp_obj_range_it_t *o = MP_OBJ_TO_PTR(o_in);
+    if ((o->step > 0 && o->cur < o->stop) || (o->step < 0 && o->cur > o->stop)) {
+        mp_obj_t o_out = MP_OBJ_NEW_SMALL_INT(o->cur);
+        o->cur += o->step;
+        return o_out;
+    } else {
+        return MP_OBJ_STOP_ITERATION;
+    }
+}
+
+STATIC const mp_obj_type_t mp_type_range_it = {
+    { &mp_type_type },
+    .flags = MP_TYPE_FLAG_EXTENDED,
+    .name = MP_QSTR_iterator,
+    MP_TYPE_EXTENDED_FIELDS(
+        .getiter = mp_identity_getiter,
+        .iternext = range_it_iternext,
+        ),
+};
+
+STATIC mp_obj_t mp_obj_new_range_iterator(mp_int_t cur, mp_int_t stop, mp_int_t step, mp_obj_iter_buf_t *iter_buf) {
+    assert(sizeof(mp_obj_range_it_t) <= sizeof(mp_obj_iter_buf_t));
+    mp_obj_range_it_t *o = (mp_obj_range_it_t *)iter_buf;
+    o->base.type = &mp_type_range_it;
+    o->cur = cur;
+    o->stop = stop;
+    o->step = step;
+    return MP_OBJ_FROM_PTR(o);
+}
+
+/******************************************************************************/
+/* range                                                                      */
+
+typedef struct _mp_obj_range_t {
+    mp_obj_base_t base;
+    // TODO make these values generic objects or something
+    mp_int_t start;
+    mp_int_t stop;
+    mp_int_t step;
+} mp_obj_range_t;
+
+STATIC void range_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
+    (void)kind;
+    mp_obj_range_t *self = MP_OBJ_TO_PTR(self_in);
+    mp_printf(print, "range(" INT_FMT ", " INT_FMT "", self->start, self->stop);
+    if (self->step == 1) {
+        mp_print_str(print, ")");
+    } else {
+        mp_printf(print, ", " INT_FMT ")", self->step);
+    }
+}
+
+STATIC mp_obj_t range_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
+    mp_arg_check_num(n_args, n_kw, 1, 3, false);
+
+    mp_obj_range_t *o = m_new_obj(mp_obj_range_t);
+    o->base.type = type;
+    o->start = 0;
+    o->step = 1;
+
+    if (n_args == 1) {
+        o->stop = mp_obj_get_int(args[0]);
+    } else {
+        o->start = mp_obj_get_int(args[0]);
+        o->stop = mp_obj_get_int(args[1]);
+        if (n_args == 3) {
+            o->step = mp_obj_get_int(args[2]);
+            if (o->step == 0) {
+                mp_raise_ValueError(MP_ERROR_TEXT("zero step"));
+            }
+        }
+    }
+
+    return MP_OBJ_FROM_PTR(o);
+}
+
+STATIC mp_int_t range_len(mp_obj_range_t *self) {
+    // When computing length, need to take into account step!=1 and step<0.
+    mp_int_t len = self->stop - self->start + self->step;
+    if (self->step > 0) {
+        len -= 1;
+    } else {
+        len += 1;
+    }
+    len = len / self->step;
+    if (len < 0) {
+        len = 0;
+    }
+    return len;
+}
+
+STATIC mp_obj_t range_unary_op(mp_unary_op_t op, mp_obj_t self_in) {
+    mp_obj_range_t *self = MP_OBJ_TO_PTR(self_in);
+    mp_int_t len = range_len(self);
+    switch (op) {
+        case MP_UNARY_OP_BOOL:
+            return mp_obj_new_bool(len > 0);
+        case MP_UNARY_OP_LEN:
+            return MP_OBJ_NEW_SMALL_INT(len);
+        default:
+            return MP_OBJ_NULL;      // op not supported
+    }
+}
+
+#if MICROPY_PY_BUILTINS_RANGE_BINOP
+STATIC mp_obj_t range_binary_op(mp_binary_op_t op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
+    if (!mp_obj_is_type(rhs_in, &mp_type_range) || op != MP_BINARY_OP_EQUAL) {
+        return MP_OBJ_NULL; // op not supported
+    }
+    mp_obj_range_t *lhs = MP_OBJ_TO_PTR(lhs_in);
+    mp_obj_range_t *rhs = MP_OBJ_TO_PTR(rhs_in);
+    mp_int_t lhs_len = range_len(lhs);
+    mp_int_t rhs_len = range_len(rhs);
+    return mp_obj_new_bool(
+        lhs_len == rhs_len
+        && (lhs_len == 0
+            || (lhs->start == rhs->start
+                && (lhs_len == 1 || lhs->step == rhs->step)))
+        );
+}
+#endif
+
+STATIC mp_obj_t range_subscr(mp_obj_t self_in, mp_obj_t index, mp_obj_t value) {
+    if (value == MP_OBJ_SENTINEL) {
+        // load
+        mp_obj_range_t *self = MP_OBJ_TO_PTR(self_in);
+        mp_int_t len = range_len(self);
+        #if MICROPY_PY_BUILTINS_SLICE
+        if (mp_obj_is_type(index, &mp_type_slice)) {
+            mp_bound_slice_t slice;
+            mp_seq_get_fast_slice_indexes(len, index, &slice);
+            mp_obj_range_t *o = m_new_obj(mp_obj_range_t);
+            o->base.type = &mp_type_range;
+            o->start = self->start + slice.start * self->step;
+            o->stop = self->start + slice.stop * self->step;
+            o->step = slice.step * self->step;
+            if (slice.step < 0) {
+                // Negative slice steps have inclusive stop, so adjust for exclusive
+                o->stop -= self->step;
+            }
+            return MP_OBJ_FROM_PTR(o);
+        }
+        #endif
+        size_t index_val = mp_get_index(self->base.type, len, index, false);
+        return MP_OBJ_NEW_SMALL_INT(self->start + index_val * self->step);
+    } else {
+        return MP_OBJ_NULL; // op not supported
+    }
+}
+
+STATIC mp_obj_t range_getiter(mp_obj_t o_in, mp_obj_iter_buf_t *iter_buf) {
+    mp_obj_range_t *o = MP_OBJ_TO_PTR(o_in);
+    return mp_obj_new_range_iterator(o->start, o->stop, o->step, iter_buf);
+}
+
+
+#if MICROPY_PY_BUILTINS_RANGE_ATTRS
+STATIC void range_attr(mp_obj_t o_in, qstr attr, mp_obj_t *dest) {
+    if (dest[0] != MP_OBJ_NULL) {
+        // not load attribute
+        return;
+    }
+    mp_obj_range_t *o = MP_OBJ_TO_PTR(o_in);
+    if (attr == MP_QSTR_start) {
+        dest[0] = mp_obj_new_int(o->start);
+    } else if (attr == MP_QSTR_stop) {
+        dest[0] = mp_obj_new_int(o->stop);
+    } else if (attr == MP_QSTR_step) {
+        dest[0] = mp_obj_new_int(o->step);
+    }
+}
+#endif
+
+const mp_obj_type_t mp_type_range = {
+    { &mp_type_type },
+    .flags = MP_TYPE_FLAG_EXTENDED,
+    .name = MP_QSTR_range,
+    .print = range_print,
+    .make_new = range_make_new,
+    #if MICROPY_PY_BUILTINS_RANGE_ATTRS
+    .attr = range_attr,
+    #endif
+    MP_TYPE_EXTENDED_FIELDS(
+        .unary_op = range_unary_op,
+        #if MICROPY_PY_BUILTINS_RANGE_BINOP
+        .binary_op = range_binary_op,
+        #endif
+        .subscr = range_subscr,
+        .getiter = range_getiter,
+        ),
+};