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Diffstat (limited to 'shared-bindings/_bleio/UUID.c')
| -rw-r--r-- | shared-bindings/_bleio/UUID.c | 280 |
1 files changed, 280 insertions, 0 deletions
diff --git a/shared-bindings/_bleio/UUID.c b/shared-bindings/_bleio/UUID.c new file mode 100644 index 000000000..3c0889aad --- /dev/null +++ b/shared-bindings/_bleio/UUID.c @@ -0,0 +1,280 @@ +/* + * 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 <string.h> + +#include "py/objproperty.h" +#include "py/objstr.h" +#include "py/runtime.h" +#include "shared-bindings/_bleio/UUID.h" + +//| .. currentmodule:: _bleio +//| +//| :class:`UUID` -- BLE UUID +//| ========================================================= +//| +//| A 16-bit or 128-bit UUID. Can be used for services, characteristics, descriptors and more. +//| + +//| .. class:: UUID(value) +//| +//| 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 or typing.ByteString +//| +STATIC mp_obj_t bleio_uuid_make_new(const mp_obj_type_t *type, size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args) { + mp_arg_check_num(n_args, kw_args, 1, 1, false); + + bleio_uuid_obj_t *self = m_new_obj(bleio_uuid_obj_t); + self->base.type = type; + + const mp_obj_t value = pos_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(translate("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(translate("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(translate("UUID value is not str, int or byte buffer")); + } + + if (bufinfo.len != 16) { + mp_raise_ValueError(translate("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); +} + +//| .. attribute:: uuid16 +//| +//| 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); + +const mp_obj_property_t bleio_uuid_uuid16_obj = { + .base.type = &mp_type_property, + .proxy = {(mp_obj_t)&bleio_uuid_get_uuid16_obj, + (mp_obj_t)&mp_const_none_obj, + (mp_obj_t)&mp_const_none_obj}, +}; + +//| .. attribute:: uuid128 +//| +//| 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_uuid128(self, uuid128)) { + mp_raise_AttributeError(translate("not a 128-bit UUID")); + } + return mp_obj_new_bytes(uuid128, 16); +} + +MP_DEFINE_CONST_FUN_OBJ_1(bleio_uuid_get_uuid128_obj, bleio_uuid_get_uuid128); + +const mp_obj_property_t bleio_uuid_uuid128_obj = { + .base.type = &mp_type_property, + .proxy = {(mp_obj_t)&bleio_uuid_get_uuid128_obj, + (mp_obj_t)&mp_const_none_obj, + (mp_obj_t)&mp_const_none_obj}, +}; + +//| .. attribute:: size +//| +//| 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); + +const mp_obj_property_t bleio_uuid_size_obj = { + .base.type = &mp_type_property, + .proxy = {(mp_obj_t)&bleio_uuid_get_size_obj, + (mp_obj_t)&mp_const_none_obj, + (mp_obj_t)&mp_const_none_obj}, +}; + +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) }, +}; + +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 + } +} + +//| + +//| .. method:: __eq__(other) +//| +//| 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 and uuid128 references match. + case MP_BINARY_OP_EQUAL: + if (MP_OBJ_IS_TYPE(rhs_in, &bleio_uuid_type)) { + return mp_obj_new_bool( + common_hal_bleio_uuid_get_uuid16(lhs_in) == common_hal_bleio_uuid_get_uuid16(rhs_in) && + common_hal_bleio_uuid_get_uuid128_reference(lhs_in) == + common_hal_bleio_uuid_get_uuid128_reference(rhs_in)); + } 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]; + (void) 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]); + } +} + +const mp_obj_type_t bleio_uuid_type = { + { &mp_type_type }, + .name = MP_QSTR_UUID, + .print = bleio_uuid_print, + .make_new = bleio_uuid_make_new, + .unary_op = bleio_uuid_unary_op, + .binary_op = bleio_uuid_binary_op, + .locals_dict = (mp_obj_dict_t*)&bleio_uuid_locals_dict, +}; |