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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright (c) 2015-2018 Linaro Limited
*/
/**
* @file
*
* ODP Hash functions
*/
#ifndef ODP_API_SPEC_HASH_H_
#define ODP_API_SPEC_HASH_H_
#include <odp/visibility_begin.h>
#ifdef __cplusplus
extern "C" {
#endif
#include <odp/api/std_types.h>
/** @defgroup odp_hash ODP HASH
* Hash functions.
* @{
*/
/**
* Calculate CRC-32
*
* Calculates CRC-32 over the data. The polynomial is 0x04c11db7.
*
* @param data Pointer to data
* @param data_len Data length in bytes
* @param init_val CRC generator initialization value
*
* @return CRC32 value
*/
uint32_t odp_hash_crc32(const void *data, uint32_t data_len, uint32_t init_val);
/**
* Calculate CRC-32C
*
* Calculates CRC-32C (a.k.a. CRC-32 Castagnoli) over the data.
* The polynomial is 0x1edc6f41.
*
* @param data Pointer to data
* @param data_len Data length in bytes
* @param init_val CRC generator initialization value
*
* @return CRC32C value
*/
uint32_t odp_hash_crc32c(const void *data, uint32_t data_len,
uint32_t init_val);
/**
* CRC parameters
*
* Supports CRCs up to 64 bits
*/
typedef struct odp_hash_crc_param_t {
/** CRC width in bits */
uint32_t width;
/** Polynomial (stored in 'width' LSB bits) */
uint64_t poly;
/** 0: don't reflect, 1: reflect bits in input bytes */
odp_bool_t reflect_in;
/** 0: don't reflect, 1: reflect bits in output bytes */
odp_bool_t reflect_out;
/** XOR this value to CRC output (stored in 'width' LSB bits) */
uint64_t xor_out;
} odp_hash_crc_param_t;
/**
* Calculate up to 64 bit CRC using the given parameters
*
* Calculates CRC over the data using the given parameters.
*
* @param data Pointer to data
* @param data_len Data length in bytes
* @param init_val CRC generator initialization value
* @param crc_param CRC parameters
* @param crc Pointer for CRC output
*
* @return 0 on success, <0 on failure (e.g. not supported algorithm)
*/
int odp_hash_crc_gen64(const void *data, uint32_t data_len,
uint64_t init_val, odp_hash_crc_param_t *crc_param,
uint64_t *crc);
/**
* @}
*/
#ifdef __cplusplus
}
#endif
#include <odp/visibility_end.h>
#endif
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