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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright (c) 2017-2018 Linaro Limited
*/
/**
* @file
*
* ODP checksum functions.
*/
#ifndef ODP_API_SPEC_CHKSUM_H_
#define ODP_API_SPEC_CHKSUM_H_
#include <odp/visibility_begin.h>
#ifdef __cplusplus
extern "C" {
#endif
#include <odp/api/std_types.h>
/** @defgroup odp_chksum ODP CHECKSUM
* Checksum functions.
* @{
*/
/**
* Ones' complement sum of 16-bit words
*
* Calculates 16-bit ones' complement sum over the data. In case of odd number
* of bytes, calculation uses a zero byte as padding at the end. This algorithm
* may be used as part of e.g. IPv4/UDP/TCP checksum generation and checking.
*
* @param data Pointer to data. Data address must be 16-bit aligned
* in minimum.
* @param data_len Data length in bytes. In case of an odd number, calculation
* includes one byte of padding.
*
* @return Ones' complement sum
*/
uint16_t odp_chksum_ones_comp16(const void *data, uint32_t data_len);
/**
* @}
*/
#ifdef __cplusplus
}
#endif
#include <odp/visibility_end.h>
#endif
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