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Implement first draft of CRC core

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This commit is contained in:
Mario Hüttel
2022-09-05 20:46:43 +02:00
parent 9ee80cc8f7
commit 8f19470db3
8 changed files with 362 additions and 47 deletions
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54
include/patchelfcrc/crc.h Normal file
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@@ -0,0 +1,54 @@
/*
* This file is part of patchelfcrc .
* Copyright (c) 2022 Mario Hüttel.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 2 only.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _CRC_H_
#define _CRC_H_
#include <stdint.h>
#include <stdbool.h>
#include <stddef.h>
struct crc_settings {
uint64_t polynomial;
uint32_t xor;
uint32_t start_value;
bool rev;
};
struct crc_calc {
struct crc_settings settings;
uint32_t crc_val;
uint32_t crc_mask;
uint32_t crc_length;
uint32_t *table;
};
int crc_len_from_poly(uint64_t polynomial);
void crc_init(struct crc_calc *crc, const struct crc_settings *settings);
void crc_destroy(struct crc_calc *crc);
void crc_push_byte(struct crc_calc *crc, uint8_t b);
void crc_push_bytes(struct crc_calc *crc, const uint8_t *b, size_t len);
void crc_finish_calc(struct crc_calc *crc);
uint32_t crc_get_value(struct crc_calc *crc);
#endif /* _CRC_H_ */

25
include/patchelfcrc/named_crcs.h
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@@ -1,15 +1,26 @@
/*
* This file is part of patchelfcrc .
* Copyright (c) 2022 Mario Hüttel.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 2 only.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _NAMED_CRCS_H_
#define _NAMED_CRCS_H_
#include <stdint.h>
#include <stdbool.h>
struct crc_settings {
uint32_t polynomial;
uint32_t xor;
uint32_t start_value;
bool rev;
};
#include <patchelfcrc/crc.h>
struct named_crc {
const char *name;

17
include/patchelfcrc/version.h
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@@ -1,3 +1,20 @@
/*
* This file is part of patchelfcrc .
* Copyright (c) 2022 Mario Hüttel.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 2 only.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _VERSION_H_
#define _VERSION_H_