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73 lines
1.8 KiB
73 lines
1.8 KiB
4 months ago
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/*
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* Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef UTIL_H
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#define UTIL_H
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/*
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* All the includes that are needed for code using this module to
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* compile correctly should be #included here.
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*/
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/************************ Defines ******************************/
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/* invers the bytes on a word- used for output from HASH */
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#ifdef BIG__ENDIAN
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#define UTIL_INVERSE_UINT32_BYTES(val) (val)
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#else
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#define UTIL_INVERSE_UINT32_BYTES(val) \
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(((val) >> 24) | (((val) & 0x00FF0000) >> 8) | (((val) & 0x0000FF00) << 8) | (((val) & 0x000000FF) << 24))
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#endif
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/* invers the bytes on a word - used for input data for HASH */
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#ifdef BIG__ENDIAN
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#define UTIL_REVERT_UINT32_BYTES(val) \
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(((val) >> 24) | (((val) & 0x00FF0000) >> 8) | (((val) & 0x0000FF00) << 8) | (((val) & 0x000000FF) << 24))
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#else
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#define UTIL_REVERT_UINT32_BYTES(val) (val)
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#endif
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/* ------------------------------------------------------------
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**
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* @brief This function executes a reverse bytes copying from one buffer to another buffer.
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*
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* @param[in] dst_ptr - The pointer to destination buffer.
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* @param[in] src_ptr - The pointer to source buffer.
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* @param[in] size - The size in bytes.
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*
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*/
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void UTIL_ReverseMemCopy(uint8_t *dst_ptr, uint8_t *src_ptr, uint32_t size);
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/* ------------------------------------------------------------
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**
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* @brief This function executes a reversed byte copy on a specified buffer.
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*
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* on a 6 byte byffer:
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*
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* buff[5] <---> buff[0]
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* buff[4] <---> buff[1]
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* buff[3] <---> buff[2]
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*
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* @param[in] dst_ptr - The counter buffer.
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* @param[in] src_ptr - The counter size in bytes.
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*
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*/
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void UTIL_ReverseBuff(uint8_t *buff_ptr, uint32_t size);
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#ifdef __cplusplus
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}
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#endif
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#endif
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