xor.h
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1 /*
2  * Copyright (C) 2021 Benjamin Valentin <benjamin.valentin@ml-pa.com>
3  *
4  * This file is subject to the terms and conditions of the GNU Lesser
5  * General Public License v2.1. See the file LICENSE in the top level
6  * directory for more details.
7  */
8 
9 #pragma once
10 
29 #include <stddef.h>
30 #include <stdint.h>
31 
32 #ifdef __cplusplus
33 extern "C" {
34 #endif
35 
39 #ifndef CONFIG_CODING_XOR_CHECK_BYTES
40 #define CONFIG_CODING_XOR_CHECK_BYTES 3U
41 #endif
42 
48 #define CODING_XOR_PARITY_LEN(in) (((in) + CONFIG_CODING_XOR_CHECK_BYTES - 1) \
49  / CONFIG_CODING_XOR_CHECK_BYTES)
50 
64 void coding_xor_generate(void *data, size_t len, uint8_t *parity);
65 
85 bool coding_xor_recover(void *data, size_t len, uint8_t *parity,
86  uint8_t *blocks, size_t block_size, bool recover_parity);
87 #ifdef __cplusplus
88 }
89 #endif
90 
coding_xor_generate
void coding_xor_generate(void *data, size_t len, uint8_t *parity)
Generate parity and mix data buffer.
coding_xor_recover
bool coding_xor_recover(void *data, size_t len, uint8_t *parity, uint8_t *blocks, size_t block_size, bool recover_parity)
Restore and unmix buffer.