kopia lustrzana https://github.com/micropython/micropython
56 wiersze
2.3 KiB
C
56 wiersze
2.3 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013-2023 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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// This file is never compiled standalone, it's included directly from
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// extmod/modos.c via MICROPY_PY_OS_INCLUDEFILE.
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#include "py/runtime.h"
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#include "extmod/modmachine.h"
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#include "drivers/rng.h"
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#if MICROPY_PY_OS_URANDOM
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// Return a bytes object with n random bytes, generated by the hardware random number generator.
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STATIC mp_obj_t mp_os_urandom(mp_obj_t num) {
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mp_int_t n = mp_obj_get_int(num);
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vstr_t vstr;
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vstr_init_len(&vstr, n);
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for (int i = 0; i < n; i++) {
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vstr.buf[i] = (uint8_t)(rng_generate_random_word() & 0xFF);
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}
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return mp_obj_new_bytes_from_vstr(&vstr);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(mp_os_urandom_obj, mp_os_urandom);
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#endif
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#if MICROPY_PY_OS_DUPTERM
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// TODO should accept any object with read/write methods.
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void mp_os_dupterm_stream_detached_attached(mp_obj_t stream_detached, mp_obj_t stream_attached) {
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if (!(stream_attached == mp_const_none || mp_obj_get_type(stream_attached) == &machine_uart_type)) {
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mp_raise_ValueError(MP_ERROR_TEXT("need a UART object"));
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}
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}
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#endif // MICROPY_PY_OS_DUPTERM
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