add circuitpython code

1 files changed, 62 insertions, 0 deletions

diff --git a/circuitpython/py/objarray.h b/circuitpython/py/objarray.h
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--- /dev/null
+++ b/circuitpython/py/objarray.h
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+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * SPDX-FileCopyrightText: Copyright (c) 2013, 2014 Damien P. George
+ * Copyright (c) 2014 Paul Sokolovsky
+ *
+ * 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.
+ */
+#ifndef MICROPY_INCLUDED_PY_OBJARRAY_H
+#define MICROPY_INCLUDED_PY_OBJARRAY_H
+
+#include "py/obj.h"
+
+// Used only for memoryview types, set in "typecode" to indicate a writable memoryview
+#define MP_OBJ_ARRAY_TYPECODE_FLAG_RW (0x80)
+
+// This structure is used for all of bytearray, array.array, memoryview
+// objects.  Note that memoryview has different meaning for some fields,
+// see comment at the beginning of objarray.c.
+typedef struct _mp_obj_array_t {
+    mp_obj_base_t base;
+    size_t typecode : 8;
+    // free is number of unused elements after len used elements
+    // alloc size = len + free
+    // But for memoryview, 'free' is reused as offset (in elements) into the
+    // parent object. (Union is not used to not go into a complication of
+    // union-of-bitfields with different toolchains). See comments in
+    // objarray.c.
+    size_t free : (8 * sizeof(size_t) - 8);
+    size_t len; // in elements
+    void *items;
+} mp_obj_array_t;
+
+#if MICROPY_PY_BUILTINS_MEMORYVIEW
+static inline void mp_obj_memoryview_init(mp_obj_array_t *self, size_t typecode, size_t offset, size_t len, void *items) {
+    self->base.type = &mp_type_memoryview;
+    self->typecode = typecode;
+    self->free = offset;
+    self->len = len;
+    self->items = items;
+}
+#endif
+
+#endif // MICROPY_INCLUDED_PY_OBJARRAY_H