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circuitpython/py/proto.c

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1.9 KiB

/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2019 Jeff Epler for Adafruit Industries
*
* 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 "py/obj.h"
#include "py/proto.h"
#include "py/runtime.h"
#ifndef MICROPY_UNSAFE_PROTO
const void *mp_proto_get(uint16_t name, mp_const_obj_t obj) {
mp_obj_type_t *type = mp_obj_get_type(obj);
if (!type->protocol) return NULL;
uint16_t proto_name = *(const uint16_t*) type->protocol;
if (proto_name == name) {
return type->protocol;
}
return NULL;
}
#endif
const void *mp_proto_get_or_throw(uint16_t name, mp_const_obj_t obj) {
const void *proto = mp_proto_get(name, obj);
if (proto) {
return proto;
}
mp_raise_TypeError_varg(translate("'%s' object does not support '%s'"),
mp_obj_get_type_str(obj), qstr_str(name));
}