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/** @file
* IPRT - CRCs and Checksums.
*/
/*
* Copyright (C) 2006-2025 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* 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, in version 3 of the
* License.
*
* 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 <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
#ifndef IPRT_INCLUDED_crc_h
#define IPRT_INCLUDED_crc_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
#include <iprt/cdefs.h>
#include <iprt/types.h>
RT_C_DECLS_BEGIN
/** @defgroup grp_rt_crc RTCrc - Checksums and CRCs.
* @ingroup grp_rt
* @{
*/
/** @defgroup grp_rt_crc32 CRC-32
* @{ */
/**
* Calculate CRC-32 for a memory block.
*
* @returns CRC-32 for the memory block.
* @param pv Pointer to the memory block.
* @param cb Size of the memory block in bytes.
*/
RTDECL(uint32_t) RTCrc32(const void *pv, size_t cb);
/**
* Start a multiblock CRC-32 calculation.
*
* @returns Start CRC-32.
*/
RTDECL(uint32_t) RTCrc32Start(void);
/**
* Processes a multiblock of a CRC-32 calculation.
*
* @returns Intermediate CRC-32 value.
* @param uCRC32 Current CRC-32 intermediate value.
* @param pv The data block to process.
* @param cb The size of the data block in bytes.
*/
RTDECL(uint32_t) RTCrc32Process(uint32_t uCRC32, const void *pv, size_t cb);
/**
* Complete a multiblock CRC-32 calculation.
*
* @returns CRC-32 value.
* @param uCRC32 Current CRC-32 intermediate value.
*/
RTDECL(uint32_t) RTCrc32Finish(uint32_t uCRC32);
/** @} */
/** @defgroup grp_rt_crc64 CRC-64 Calculation
* @{ */
/**
* Calculate CRC-64 for a memory block.
*
* @returns CRC-64 for the memory block.
* @param pv Pointer to the memory block.
* @param cb Size of the memory block in bytes.
*/
RTDECL(uint64_t) RTCrc64(const void *pv, size_t cb);
/**
* Start a multiblock CRC-64 calculation.
*
* @returns Start CRC-64.
*/
RTDECL(uint64_t) RTCrc64Start(void);
/**
* Processes a multiblock of a CRC-64 calculation.
*
* @returns Intermediate CRC-64 value.
* @param uCRC64 Current CRC-64 intermediate value.
* @param pv The data block to process.
* @param cb The size of the data block in bytes.
*/
RTDECL(uint64_t) RTCrc64Process(uint64_t uCRC64, const void *pv, size_t cb);
/**
* Complete a multiblock CRC-64 calculation.
*
* @returns CRC-64 value.
* @param uCRC64 Current CRC-64 intermediate value.
*/
RTDECL(uint64_t) RTCrc64Finish(uint64_t uCRC64);
/** @} */
/** @defgroup grp_rt_crc_adler32 Adler-32
* @{ */
/**
* Calculate Adler-32 for a memory block.
*
* @returns Adler-32 for the memory block.
* @param pv Pointer to the memory block.
* @param cb Size of the memory block in bytes.
*/
RTDECL(uint32_t) RTCrcAdler32(void const *pv, size_t cb);
/**
* Start a multiblock Adler-32 calculation.
*
* @returns Start Adler-32.
*/
RTDECL(uint32_t) RTCrcAdler32Start(void);
/**
* Processes a multiblock of a Adler-32 calculation.
*
* @returns Intermediate Adler-32 value.
* @param uCrc Current Adler-32 intermediate value.
* @param pv The data block to process.
* @param cb The size of the data block in bytes.
*/
RTDECL(uint32_t) RTCrcAdler32Process(uint32_t uCrc, void const *pv, size_t cb);
/**
* Complete a multiblock Adler-32 calculation.
*
* @returns Adler-32 value.
* @param uCrc Current Adler-32 intermediate value.
*/
RTDECL(uint32_t) RTCrcAdler32Finish(uint32_t uCrc);
/** @} */
/** @defgroup grp_rt_crc32c CRC-32C
* @{ */
/**
* Calculate CRC-32C for a memory block.
*
* @returns CRC-32C for the memory block.
* @param pv Pointer to the memory block.
* @param cb Size of the memory block in bytes.
*/
RTDECL(uint32_t) RTCrc32C(const void *pv, size_t cb);
/**
* Start a multiblock CRC-32 calculation.
*
* @returns Start CRC-32.
*/
RTDECL(uint32_t) RTCrc32CStart(void);
/**
* Processes a multiblock of a CRC-32C calculation.
*
* @returns Intermediate CRC-32C value.
* @param uCRC32C Current CRC-32C intermediate value.
* @param pv The data block to process.
* @param cb The size of the data block in bytes.
*/
RTDECL(uint32_t) RTCrc32CProcess(uint32_t uCRC32C, const void *pv, size_t cb);
/**
* Complete a multiblock CRC-32 calculation.
*
* @returns CRC-32 value.
* @param uCRC32 Current CRC-32 intermediate value.
*/
RTDECL(uint32_t) RTCrc32CFinish(uint32_t uCRC32);
/** @} */
/** @defgroup grp_rt_crc16ccitt CRC-16-CCITT
* @{ */
/**
* Calculate CRC-16-CCITT for a memory block.
*
* @returns CRC-16-CCITT for the memory block.
* @param pv Pointer to the memory block.
* @param cb Size of the memory block in bytes.
*/
RTDECL(uint16_t) RTCrc16Ccitt(const void *pv, size_t cb);
/**
* Start a multiblock CRC-16-CCITT calculation.
*
* @returns Start CRC-16-CCITT.
*/
RTDECL(uint16_t) RTCrc16CcittStart(void);
/**
* Processes a multiblock of a CRC-16-CCITT calculation.
*
* @returns Intermediate CRC-16-CCITT value.
* @param uCrc Current CRC-16-CCITT intermediate value.
* @param pv The data block to process.
* @param cb The size of the data block in bytes.
*/
RTDECL(uint16_t) RTCrc16CcittProcess(uint16_t uCrc, const void *pv, size_t cb);
/**
* Complete a multiblock CRC-16-CCITT calculation.
*
* @returns CRC-16-CCITT value.
* @param uCrc Current CRC-16-CCITT intermediate value.
*/
RTDECL(uint16_t) RTCrc16CcittFinish(uint16_t uCrc);
/** @} */
/** @} */
RT_C_DECLS_END
#endif /* !IPRT_INCLUDED_crc_h */
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