/* * This file is part of the MicroPython project, http://micropython.org/ * * The MIT License (MIT) * * Copyright (c) 2019 Dan Halbert for Adafruit Industries * Copyright (c) 2018 Artur Pacholec * Copyright (c) 2017 Glenn Ruben Bakke * * 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 #include "py/objproperty.h" #include "py/objstr.h" #include "py/runtime.h" #include "shared-bindings/_bleio/UUID.h" //| class UUID: //| """A 16-bit or 128-bit UUID. Can be used for services, characteristics, descriptors and more.""" //| //| def __init__(self, value: Union[int, ReadableBuffer, str]) -> None: //| """Create a new UUID or UUID object encapsulating the uuid value. //| The value can be one of: //| //| - an `int` value in range 0 to 0xFFFF (Bluetooth SIG 16-bit UUID) //| - a buffer object (bytearray, bytes) of 16 bytes in little-endian order (128-bit UUID) //| - a string of hex digits of the form 'xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx' //| //| Creating a 128-bit UUID registers the UUID with the onboard BLE software, and provides a //| temporary 16-bit UUID that can be used in place of the full 128-bit UUID. //| //| :param value: The uuid value to encapsulate //| :type value: int, ~circuitpython_typing.ReadableBuffer or str""" //| ... STATIC mp_obj_t bleio_uuid_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) { mp_arg_check_num(n_args, n_kw, 1, 1, false); bleio_uuid_obj_t *self = mp_obj_malloc(bleio_uuid_obj_t, &bleio_uuid_type); const mp_obj_t value = all_args[0]; uint8_t uuid128[16]; if (mp_obj_is_int(value)) { mp_int_t uuid16 = mp_obj_get_int(value); if (uuid16 < 0 || uuid16 > 0xffff) { mp_raise_ValueError(MP_ERROR_TEXT("UUID integer value must be 0-0xffff")); } // NULL means no 128-bit value. common_hal_bleio_uuid_construct(self, uuid16, NULL); } else { if (mp_obj_is_str(value)) { // 'xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx' GET_STR_DATA_LEN(value, chars, len); char hex[32]; // Validate length, hyphens, and hex digits. bool good_uuid = len == 36 && chars[8] == '-' && chars[13] == '-' && chars[18] == '-' && chars[23] == '-'; if (good_uuid) { size_t hex_idx = 0; for (size_t i = 0; i < len; i++) { if (unichar_isxdigit(chars[i])) { hex[hex_idx] = chars[i]; hex_idx++; } } good_uuid = hex_idx == 32; } if (!good_uuid) { mp_raise_ValueError(MP_ERROR_TEXT("UUID string not 'xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx'")); } size_t hex_idx = 0; for (int i = 15; i >= 0; i--) { uuid128[i] = (unichar_xdigit_value(hex[hex_idx]) << 4) | unichar_xdigit_value(hex[hex_idx + 1]); hex_idx += 2; } } else { // Last possibility is that it's a buf. mp_buffer_info_t bufinfo; if (!mp_get_buffer(value, &bufinfo, MP_BUFFER_READ)) { mp_raise_ValueError(MP_ERROR_TEXT("UUID value is not str, int or byte buffer")); } if (bufinfo.len != 16) { mp_raise_ValueError(MP_ERROR_TEXT("Byte buffer must be 16 bytes.")); } memcpy(uuid128, bufinfo.buf, 16); } // Str and bytes both get constructed the same way here. uint32_t uuid16 = (uuid128[13] << 8) | uuid128[12]; uuid128[12] = 0; uuid128[13] = 0; common_hal_bleio_uuid_construct(self, uuid16, uuid128); } return MP_OBJ_FROM_PTR(self); } //| uuid16: int //| """The 16-bit part of the UUID. (read-only) //| //| :type: int""" STATIC mp_obj_t bleio_uuid_get_uuid16(mp_obj_t self_in) { bleio_uuid_obj_t *self = MP_OBJ_TO_PTR(self_in); return MP_OBJ_NEW_SMALL_INT(common_hal_bleio_uuid_get_uuid16(self)); } MP_DEFINE_CONST_FUN_OBJ_1(bleio_uuid_get_uuid16_obj, bleio_uuid_get_uuid16); MP_PROPERTY_GETTER(bleio_uuid_uuid16_obj, (mp_obj_t)&bleio_uuid_get_uuid16_obj); //| uuid128: bytes //| """The 128-bit value of the UUID //| Raises AttributeError if this is a 16-bit UUID. (read-only) //| //| :type: bytes""" STATIC mp_obj_t bleio_uuid_get_uuid128(mp_obj_t self_in) { bleio_uuid_obj_t *self = MP_OBJ_TO_PTR(self_in); uint8_t uuid128[16]; if (common_hal_bleio_uuid_get_size(self) != 128) { mp_raise_AttributeError(MP_ERROR_TEXT("not a 128-bit UUID")); } common_hal_bleio_uuid_get_uuid128(self, uuid128); return mp_obj_new_bytes(uuid128, 16); } MP_DEFINE_CONST_FUN_OBJ_1(bleio_uuid_get_uuid128_obj, bleio_uuid_get_uuid128); MP_PROPERTY_GETTER(bleio_uuid_uuid128_obj, (mp_obj_t)&bleio_uuid_get_uuid128_obj); //| size: int //| """128 if this UUID represents a 128-bit vendor-specific UUID. 16 if this UUID represents a //| 16-bit Bluetooth SIG assigned UUID. (read-only) 32-bit UUIDs are not currently supported. //| //| :type: int""" STATIC mp_obj_t bleio_uuid_get_size(mp_obj_t self_in) { bleio_uuid_obj_t *self = MP_OBJ_TO_PTR(self_in); return MP_OBJ_NEW_SMALL_INT(common_hal_bleio_uuid_get_size(self)); } MP_DEFINE_CONST_FUN_OBJ_1(bleio_uuid_get_size_obj, bleio_uuid_get_size); MP_PROPERTY_GETTER(bleio_uuid_size_obj, (mp_obj_t)&bleio_uuid_get_size_obj); //| def pack_into(self, buffer: WriteableBuffer, offset: int = 0) -> None: //| """Packs the UUID into the given buffer at the given offset.""" //| ... STATIC mp_obj_t bleio_uuid_pack_into(mp_uint_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) { bleio_uuid_obj_t *self = MP_OBJ_TO_PTR(pos_args[0]); enum { ARG_buffer, ARG_offset }; static const mp_arg_t allowed_args[] = { { MP_QSTR_buffer, MP_ARG_OBJ | MP_ARG_REQUIRED }, { MP_QSTR_offset, MP_ARG_KW_ONLY | MP_ARG_INT, {.u_int = 0} }, }; mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)]; mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args); mp_buffer_info_t bufinfo; mp_get_buffer_raise(args[ARG_buffer].u_obj, &bufinfo, MP_BUFFER_WRITE); size_t offset = args[ARG_offset].u_int; if (offset + common_hal_bleio_uuid_get_size(self) / 8 > bufinfo.len) { mp_raise_ValueError(MP_ERROR_TEXT("Buffer + offset too small %d %d %d")); } common_hal_bleio_uuid_pack_into(self, bufinfo.buf + offset); return mp_const_none; } STATIC MP_DEFINE_CONST_FUN_OBJ_KW(bleio_uuid_pack_into_obj, 1, bleio_uuid_pack_into); STATIC const mp_rom_map_elem_t bleio_uuid_locals_dict_table[] = { { MP_ROM_QSTR(MP_QSTR_uuid16), MP_ROM_PTR(&bleio_uuid_uuid16_obj) }, { MP_ROM_QSTR(MP_QSTR_uuid128), MP_ROM_PTR(&bleio_uuid_uuid128_obj) }, { MP_ROM_QSTR(MP_QSTR_size), MP_ROM_PTR(&bleio_uuid_size_obj) }, { MP_ROM_QSTR(MP_QSTR_pack_into), MP_ROM_PTR(&bleio_uuid_pack_into_obj) }, }; STATIC MP_DEFINE_CONST_DICT(bleio_uuid_locals_dict, bleio_uuid_locals_dict_table); STATIC mp_obj_t bleio_uuid_unary_op(mp_unary_op_t op, mp_obj_t self_in) { bleio_uuid_obj_t *self = MP_OBJ_TO_PTR(self_in); switch (op) { case MP_UNARY_OP_HASH: if (common_hal_bleio_uuid_get_size(self) == 16) { return MP_OBJ_NEW_SMALL_INT(common_hal_bleio_uuid_get_uuid16(self)); } else { union { uint8_t uuid128_bytes[16]; uint16_t uuid128_uint16[8]; } uuid128; common_hal_bleio_uuid_get_uuid128(self, uuid128.uuid128_bytes); int hash = 0; for (size_t i = 0; i < MP_ARRAY_SIZE(uuid128.uuid128_uint16); i++) { hash += uuid128.uuid128_uint16[i]; } return MP_OBJ_NEW_SMALL_INT(hash); } default: return MP_OBJ_NULL; // op not supported } } //| def __eq__(self, other: object) -> bool: //| """Two UUID objects are equal if their values match and they are both 128-bit or both 16-bit.""" //| ... //| STATIC mp_obj_t bleio_uuid_binary_op(mp_binary_op_t op, mp_obj_t lhs_in, mp_obj_t rhs_in) { switch (op) { // Two UUID's are equal if their uuid16 values match or their uuid128 values match. case MP_BINARY_OP_EQUAL: if (mp_obj_is_type(rhs_in, &bleio_uuid_type)) { if (common_hal_bleio_uuid_get_size(lhs_in) == 16 && common_hal_bleio_uuid_get_size(rhs_in) == 16) { return mp_obj_new_bool(common_hal_bleio_uuid_get_uuid16(lhs_in) == common_hal_bleio_uuid_get_uuid16(rhs_in)); } uint8_t lhs[16]; uint8_t rhs[16]; common_hal_bleio_uuid_get_uuid128(lhs_in, lhs); common_hal_bleio_uuid_get_uuid128(rhs_in, rhs); return mp_obj_new_bool(memcmp(lhs, rhs, sizeof(lhs)) == 0); } else { return mp_const_false; } default: return MP_OBJ_NULL; // op not supported } } void bleio_uuid_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) { bleio_uuid_obj_t *self = MP_OBJ_TO_PTR(self_in); uint32_t size = common_hal_bleio_uuid_get_size(self); if (size == 16) { mp_printf(print, "UUID(0x%04x)", common_hal_bleio_uuid_get_uuid16(self)); } else { uint8_t uuid128[16]; common_hal_bleio_uuid_get_uuid128(self, uuid128); mp_printf(print, "UUID('" "%02x%02x%02x%02x-" "%02x%02x-" "%02x%02x-" "%02x%02x-" "%02x%02x%02x%02x%02x%02x')", uuid128[15], uuid128[14], uuid128[13], uuid128[12], uuid128[11], uuid128[10], uuid128[9], uuid128[8], uuid128[7], uuid128[6], uuid128[5], uuid128[4], uuid128[3], uuid128[2], uuid128[1], uuid128[0]); } } MP_DEFINE_CONST_OBJ_TYPE( bleio_uuid_type, MP_QSTR_UUID, MP_TYPE_FLAG_HAS_SPECIAL_ACCESSORS, print, bleio_uuid_print, make_new, bleio_uuid_make_new, locals_dict, &bleio_uuid_locals_dict, unary_op, bleio_uuid_unary_op, binary_op, bleio_uuid_binary_op );