add circuitpython code

1 files changed, 329 insertions, 0 deletions

diff --git a/circuitpython/py/objmodule.c b/circuitpython/py/objmodule.c
new file mode 100644
index 0000000..a9d20c7
--- /dev/null
+++ b/circuitpython/py/objmodule.c
@@ -0,0 +1,329 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * SPDX-FileCopyrightText: Copyright (c) 2013-2019 Damien P. George
+ * SPDX-FileCopyrightText: Copyright (c) 2014-2015 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.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+
+#include "py/gc.h"
+#include "py/objmodule.h"
+#include "py/runtime.h"
+#include "py/builtin.h"
+
+#include "genhdr/moduledefs.h"
+
+#if MICROPY_MODULE_BUILTIN_INIT
+STATIC void mp_module_call_init(mp_obj_t module_name, mp_obj_t module_obj);
+#endif
+
+STATIC void module_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
+    (void)kind;
+    mp_obj_module_t *self = MP_OBJ_TO_PTR(self_in);
+
+    const char *module_name = "";
+    mp_map_elem_t *elem = mp_map_lookup(&self->globals->map, MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_MAP_LOOKUP);
+    if (elem != NULL) {
+        module_name = mp_obj_str_get_str(elem->value);
+    }
+
+    #if MICROPY_PY___FILE__
+    // If we store __file__ to imported modules then try to lookup this
+    // symbol to give more information about the module.
+    elem = mp_map_lookup(&self->globals->map, MP_OBJ_NEW_QSTR(MP_QSTR___file__), MP_MAP_LOOKUP);
+    if (elem != NULL) {
+        mp_printf(print, "<module '%s' from '%s'>", module_name, mp_obj_str_get_str(elem->value));
+        return;
+    }
+    #endif
+
+    mp_printf(print, "<module '%s'>", module_name);
+}
+
+STATIC void module_attr(mp_obj_t self_in, qstr attr, mp_obj_t *dest) {
+    mp_obj_module_t *self = MP_OBJ_TO_PTR(self_in);
+    if (dest[0] == MP_OBJ_NULL) {
+        // load attribute
+        mp_map_elem_t *elem = mp_map_lookup(&self->globals->map, MP_OBJ_NEW_QSTR(attr), MP_MAP_LOOKUP);
+        if (elem != NULL) {
+            dest[0] = elem->value;
+        #if MICROPY_MODULE_GETATTR
+        } else if (attr != MP_QSTR___getattr__) {
+            elem = mp_map_lookup(&self->globals->map, MP_OBJ_NEW_QSTR(MP_QSTR___getattr__), MP_MAP_LOOKUP);
+            if (elem != NULL) {
+                dest[0] = mp_call_function_1(elem->value, MP_OBJ_NEW_QSTR(attr));
+            }
+        #endif
+        }
+    } else {
+        // delete/store attribute
+        mp_obj_dict_t *dict = self->globals;
+        if (dict->map.is_fixed) {
+            mp_map_elem_t *elem = mp_map_lookup(&dict->map, MP_OBJ_NEW_QSTR(attr), MP_MAP_LOOKUP);
+            #if MICROPY_CAN_OVERRIDE_BUILTINS
+            if (dict == &mp_module_builtins_globals) {
+                if (MP_STATE_VM(mp_module_builtins_override_dict) == NULL) {
+                    MP_STATE_VM(mp_module_builtins_override_dict) = gc_make_long_lived(MP_OBJ_TO_PTR(mp_obj_new_dict(1)));
+                }
+                dict = MP_STATE_VM(mp_module_builtins_override_dict);
+            } else
+            #endif
+            // Return success if the given value is already in the dictionary. This is the case for
+            // native packages with native submodules.
+            if (elem != NULL && elem->value == dest[1]) {
+                dest[0] = MP_OBJ_NULL; // indicate success
+                return;
+            } else {
+                // can't delete or store to fixed map
+                return;
+            }
+        }
+        if (dest[1] == MP_OBJ_NULL) {
+            // delete attribute
+            mp_obj_dict_delete(MP_OBJ_FROM_PTR(dict), MP_OBJ_NEW_QSTR(attr));
+        } else {
+            // store attribute
+            mp_obj_t long_lived = MP_OBJ_FROM_PTR(gc_make_long_lived(MP_OBJ_TO_PTR(dest[1])));
+            // TODO CPython allows STORE_ATTR to a module, but is this the correct implementation?
+            mp_obj_dict_store(MP_OBJ_FROM_PTR(dict), MP_OBJ_NEW_QSTR(attr), long_lived);
+        }
+        dest[0] = MP_OBJ_NULL; // indicate success
+    }
+}
+
+const mp_obj_type_t mp_type_module = {
+    { &mp_type_type },
+    .name = MP_QSTR_module,
+    .print = module_print,
+    .attr = module_attr,
+};
+
+mp_obj_t mp_obj_new_module(qstr module_name) {
+    mp_map_t *mp_loaded_modules_map = &MP_STATE_VM(mp_loaded_modules_dict).map;
+    mp_map_elem_t *el = mp_map_lookup(mp_loaded_modules_map, MP_OBJ_NEW_QSTR(module_name), MP_MAP_LOOKUP_ADD_IF_NOT_FOUND);
+    // We could error out if module already exists, but let C extensions
+    // add new members to existing modules.
+    if (el->value != MP_OBJ_NULL) {
+        return el->value;
+    }
+
+    // create new module object
+    mp_obj_module_t *o = m_new_ll_obj(mp_obj_module_t);
+    o->base.type = &mp_type_module;
+    o->globals = gc_make_long_lived(MP_OBJ_TO_PTR(mp_obj_new_dict(MICROPY_MODULE_DICT_SIZE)));
+
+    // store __name__ entry in the module
+    mp_obj_dict_store(MP_OBJ_FROM_PTR(o->globals), MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(module_name));
+
+    // store the new module into the slot in the global dict holding all modules
+    el->value = MP_OBJ_FROM_PTR(o);
+
+    // return the new module
+    return MP_OBJ_FROM_PTR(o);
+}
+
+mp_obj_dict_t *mp_obj_module_get_globals(mp_obj_t self_in) {
+    assert(mp_obj_is_type(self_in, &mp_type_module));
+    mp_obj_module_t *self = MP_OBJ_TO_PTR(self_in);
+    return self->globals;
+}
+
+void mp_obj_module_set_globals(mp_obj_t self_in, mp_obj_dict_t *globals) {
+    assert(mp_obj_is_type(self_in, &mp_type_module));
+    mp_obj_module_t *self = MP_OBJ_TO_PTR(self_in);
+    self->globals = globals;
+}
+
+/******************************************************************************/
+// Global module table and related functions
+
+STATIC const mp_rom_map_elem_t mp_builtin_module_table[] = {
+    { MP_ROM_QSTR(MP_QSTR___main__), MP_ROM_PTR(&mp_module___main__) },
+    { MP_ROM_QSTR(MP_QSTR_builtins), MP_ROM_PTR(&mp_module_builtins) },
+    { MP_ROM_QSTR(MP_QSTR_micropython), MP_ROM_PTR(&mp_module_micropython) },
+
+    #if MICROPY_PY_IO
+    #if CIRCUITPY
+    { MP_ROM_QSTR(MP_QSTR_io), MP_ROM_PTR(&mp_module_io) },
+    #else
+    { MP_ROM_QSTR(MP_QSTR_uio), MP_ROM_PTR(&mp_module_io) },
+    #endif
+    #endif
+    #if MICROPY_PY_COLLECTIONS
+    { MP_ROM_QSTR(MP_QSTR_collections), MP_ROM_PTR(&mp_module_collections) },
+    #endif
+// CircuitPython: Now in shared-bindings/, so not defined here.
+    #if MICROPY_PY_STRUCT
+    { MP_ROM_QSTR(MP_QSTR_ustruct), MP_ROM_PTR(&mp_module_ustruct) },
+    #endif
+
+    #if MICROPY_PY_BUILTINS_FLOAT
+    #if MICROPY_PY_MATH
+    { MP_ROM_QSTR(MP_QSTR_math), MP_ROM_PTR(&mp_module_math) },
+    #endif
+    #if MICROPY_PY_BUILTINS_COMPLEX && MICROPY_PY_CMATH
+    { MP_ROM_QSTR(MP_QSTR_cmath), MP_ROM_PTR(&mp_module_cmath) },
+    #endif
+    #endif
+    #if MICROPY_PY_SYS
+    { MP_ROM_QSTR(MP_QSTR_sys), MP_ROM_PTR(&mp_module_sys) },
+    #endif
+    #if MICROPY_PY_GC && MICROPY_ENABLE_GC
+    { MP_ROM_QSTR(MP_QSTR_gc), MP_ROM_PTR(&mp_module_gc) },
+    #endif
+    #if MICROPY_PY_THREAD
+    { MP_ROM_QSTR(MP_QSTR__thread), MP_ROM_PTR(&mp_module_thread) },
+    #endif
+
+    // extmod modules
+
+    // Modules included in CircuitPython are registered using MP_REGISTER_MODULE,
+    // and do not have the "u" prefix.
+
+    #if MICROPY_PY_UASYNCIO && !CIRCUITPY
+    { MP_ROM_QSTR(MP_QSTR__uasyncio), MP_ROM_PTR(&mp_module_uasyncio) },
+    #endif
+    #if MICROPY_PY_UERRNO && !CIRCUITPY
+    { MP_ROM_QSTR(MP_QSTR_uerrno), MP_ROM_PTR(&mp_module_uerrno) },
+    #endif
+    #if MICROPY_PY_UCTYPES
+    { MP_ROM_QSTR(MP_QSTR_uctypes), MP_ROM_PTR(&mp_module_uctypes) },
+    #endif
+    #if MICROPY_PY_UZLIB
+    { MP_ROM_QSTR(MP_QSTR_uzlib), MP_ROM_PTR(&mp_module_uzlib) },
+    #endif
+    #if MICROPY_PY_UJSON && !CIRCUITPY
+    { MP_ROM_QSTR(MP_QSTR_ujson), MP_ROM_PTR(&mp_module_ujson) },
+    #endif
+    #if CIRCUITPY_ULAB
+    { MP_ROM_QSTR(MP_QSTR_ulab), MP_ROM_PTR(&ulab_user_cmodule) },
+    #endif
+    #if MICROPY_PY_URE && !CIRCUITPY
+    { MP_ROM_QSTR(MP_QSTR_ure), MP_ROM_PTR(&mp_module_ure) },
+    #endif
+    #if MICROPY_PY_UHEAPQ
+    { MP_ROM_QSTR(MP_QSTR_uheapq), MP_ROM_PTR(&mp_module_uheapq) },
+    #endif
+    #if MICROPY_PY_UTIMEQ
+    { MP_ROM_QSTR(MP_QSTR_utimeq), MP_ROM_PTR(&mp_module_utimeq) },
+    #endif
+    #if MICROPY_PY_UHASHLIB
+    { MP_ROM_QSTR(MP_QSTR_hashlib), MP_ROM_PTR(&mp_module_uhashlib) },
+    #endif
+    #if MICROPY_PY_UBINASCII && !CIRCUITPY
+    { MP_ROM_QSTR(MP_QSTR_ubinascii), MP_ROM_PTR(&mp_module_ubinascii) },
+    #endif
+    #if MICROPY_PY_URANDOM
+    { MP_ROM_QSTR(MP_QSTR_urandom), MP_ROM_PTR(&mp_module_urandom) },
+    #endif
+    #if MICROPY_PY_USELECT
+    { MP_ROM_QSTR(MP_QSTR_uselect), MP_ROM_PTR(&mp_module_uselect) },
+    #endif
+    #if MICROPY_PY_FRAMEBUF
+    { MP_ROM_QSTR(MP_QSTR_framebuf), MP_ROM_PTR(&mp_module_framebuf) },
+    #endif
+    #if MICROPY_PY_BTREE
+    { MP_ROM_QSTR(MP_QSTR_btree), MP_ROM_PTR(&mp_module_btree) },
+    #endif
+
+    // extra builtin modules as defined by a port
+    MICROPY_PORT_BUILTIN_MODULES
+
+    #ifdef MICROPY_REGISTERED_MODULES
+    // builtin modules declared with MP_REGISTER_MODULE()
+    MICROPY_REGISTERED_MODULES
+    #endif
+
+    #if defined(MICROPY_DEBUG_MODULES) && defined(MICROPY_PORT_BUILTIN_DEBUG_MODULES)
+    , MICROPY_PORT_BUILTIN_DEBUG_MODULES
+    #endif
+};
+
+MP_DEFINE_CONST_MAP(mp_builtin_module_map, mp_builtin_module_table);
+
+// Tries to find a loaded module, otherwise attempts to load a builtin, otherwise MP_OBJ_NULL.
+mp_obj_t mp_module_get_loaded_or_builtin(qstr module_name) {
+    // First try loaded modules.
+    mp_map_elem_t *elem = mp_map_lookup(&MP_STATE_VM(mp_loaded_modules_dict).map, MP_OBJ_NEW_QSTR(module_name), MP_MAP_LOOKUP);
+
+    if (!elem) {
+        #if MICROPY_MODULE_WEAK_LINKS
+        return mp_module_get_builtin(module_name);
+        #else
+        // Otherwise try builtin.
+        elem = mp_map_lookup((mp_map_t *)&mp_builtin_module_map, MP_OBJ_NEW_QSTR(module_name), MP_MAP_LOOKUP);
+        if (!elem) {
+            return MP_OBJ_NULL;
+        }
+
+        #if MICROPY_MODULE_BUILTIN_INIT
+        // If found, it's a newly loaded built-in, so init it.
+        mp_module_call_init(MP_OBJ_NEW_QSTR(module_name), elem->value);
+        #endif
+        #endif
+    }
+
+    return elem->value;
+}
+
+#if MICROPY_MODULE_WEAK_LINKS
+// Tries to find a loaded module, otherwise attempts to load a builtin, otherwise MP_OBJ_NULL.
+mp_obj_t mp_module_get_builtin(qstr module_name) {
+    // Try builtin.
+    mp_map_elem_t *elem = mp_map_lookup((mp_map_t *)&mp_builtin_module_map, MP_OBJ_NEW_QSTR(module_name), MP_MAP_LOOKUP);
+    if (!elem) {
+        return MP_OBJ_NULL;
+    }
+
+    #if MICROPY_MODULE_BUILTIN_INIT
+    // If found, it's a newly loaded built-in, so init it.
+    mp_module_call_init(MP_OBJ_NEW_QSTR(module_name), elem->value);
+    #endif
+
+    return elem->value;
+}
+#endif
+
+#if MICROPY_MODULE_BUILTIN_INIT
+STATIC void mp_module_register(mp_obj_t module_name, mp_obj_t module) {
+    mp_map_t *mp_loaded_modules_map = &MP_STATE_VM(mp_loaded_modules_dict).map;
+    mp_map_lookup(mp_loaded_modules_map, module_name, MP_MAP_LOOKUP_ADD_IF_NOT_FOUND)->value = module;
+}
+
+STATIC void mp_module_call_init(mp_obj_t module_name, mp_obj_t module_obj) {
+    // Look for __init__ and call it if it exists
+    mp_obj_t dest[2];
+    mp_load_method_maybe(module_obj, MP_QSTR___init__, dest);
+    if (dest[0] != MP_OBJ_NULL) {
+        mp_call_method_n_kw(0, 0, dest);
+        // Register module so __init__ is not called again.
+        // If a module can be referenced by more than one name (eg due to weak links)
+        // then __init__ will still be called for each distinct import, and it's then
+        // up to the particular module to make sure it's __init__ code only runs once.
+        mp_module_register(module_name, module_obj);
+    }
+}
+#endif