70 lines
2.9 KiB
C
70 lines
2.9 KiB
C
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/*----------------------------------------------------------------------------
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* Copyright (c) <2018>, <Huawei Technologies Co., Ltd>
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* All rights reserved.
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice, this list of
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* conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice, this list
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* of conditions and the following disclaimer in the documentation and/or other materials
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* provided with the distribution.
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* 3. Neither the name of the copyright holder nor the names of its contributors may be used
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* to endorse or promote products derived from this software without specific prior written
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* permission.
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*---------------------------------------------------------------------------*/
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/*----------------------------------------------------------------------------
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* Notice of Export Control Law
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* ===============================================
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* Huawei LiteOS may be subject to applicable export control laws and regulations, which might
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* include those applicable to Huawei LiteOS of U.S. and the country in which you are located.
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* Import, export and usage of Huawei LiteOS in any manner by you shall be in compliance with such
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* applicable export control laws and regulations.
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*---------------------------------------------------------------------------*/
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/**
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* DATE AUTHOR INSTRUCTION
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* 2019-05-10 10:26 zhangqianfu The first version
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*
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*/
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#include <stdint.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <string.h>
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#include "cmsis_os2.h"
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__attribute__((weak)) int link_random(void* output, int len)
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{
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int i;
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int random_number;
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char* pbuf;
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if (NULL == output)
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{
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return -1;
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}
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pbuf = output;
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srand(osKernelGetTickCount() * (1000 / 100));
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for (i = 0; i < len; i += sizeof(int))
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{
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random_number = rand();
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(void) memcpy(pbuf + i, &random_number,
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sizeof(int) > (unsigned int)(len - i)? (unsigned int)(len - i): sizeof(int));
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}
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return 0;
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}
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