text: /* Copyright (c) 2015, Linaro Limited
   * All rights reserved.
   *
   * SPDX-License-Identifier:	BSD-3-Clause
   */
  
  /**
   * @file
   *
   * ODP Hash functions
   */
  
  #ifndef ODP_API_HASH_H_
  #define ODP_API_HASH_H_
  #include <odp/visibility_begin.h>
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  #include <odp/api/std_types.h>
  
  /** @defgroup odp_hash ODP HASH FUNCTIONS
   *  ODP 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
  