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