57 lines
1.4 KiB
C
57 lines
1.4 KiB
C
/*
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* This file is part of patchelfcrc .
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* Copyright (c) 2022 Mario Hüttel.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, version 2 only.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _CRC_H_
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#define _CRC_H_
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#include <stdint.h>
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#include <stdbool.h>
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#include <stddef.h>
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struct crc_settings {
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uint64_t polynomial;
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uint32_t xor;
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uint32_t start_value;
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bool rev;
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};
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struct crc_calc {
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struct crc_settings settings;
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uint32_t crc_val;
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uint32_t crc_mask;
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uint32_t crc_length;
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uint32_t *table;
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};
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int crc_len_from_poly(uint64_t polynomial);
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void crc_init(struct crc_calc *crc, const struct crc_settings *settings);
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void crc_reset(struct crc_calc *crc);
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void crc_destroy(struct crc_calc *crc);
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void crc_push_byte(struct crc_calc *crc, uint8_t b);
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void crc_push_bytes(struct crc_calc *crc, const uint8_t *b, size_t len);
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void crc_finish_calc(struct crc_calc *crc);
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uint32_t crc_get_value(struct crc_calc *crc);
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#endif /* _CRC_H_ */
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