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#ifndef _MH_SHA1_INTERNAL_H_
#define _MH_SHA1_INTERNAL_H_

/**
 *  @file mh_sha1_internal.h
 *  @brief mh_sha1 internal function prototypes and macros
 *
 *  Interface for mh_sha1 internal functions
 *
 */
#include <stdint.h>
#include "mh_sha1.h"
#include "endian_helper.h"

#ifdef __cplusplus
 extern "C" {
#endif

#ifdef _MSC_VER
# define inline __inline
#endif

 // 64byte pointer align
#define ALIGN_64(pointer) ( ((uint64_t)(pointer) + 0x3F)&(~0x3F) )

 /*******************************************************************
  *mh_sha1 constants and macros
  ******************************************************************/
 /* mh_sha1 constants */
#define MH_SHA1_H0 0x67452301UL
#define MH_SHA1_H1 0xefcdab89UL
#define MH_SHA1_H2 0x98badcfeUL
#define MH_SHA1_H3 0x10325476UL
#define MH_SHA1_H4 0xc3d2e1f0UL

#define K_00_19	0x5a827999UL
#define K_20_39 0x6ed9eba1UL
#define K_40_59 0x8f1bbcdcUL
#define K_60_79 0xca62c1d6UL

 /* mh_sha1 macros */
#define F1(b,c,d) (d ^ (b & (c ^ d)))
#define F2(b,c,d) (b ^ c ^ d)
#define F3(b,c,d) ((b & c) | (d & (b | c)))
#define F4(b,c,d) (b ^ c ^ d)

#define rol32(x, r) (((x)<<(r)) ^ ((x)>>(32-(r))))

 /*******************************************************************
  * SHA1 API internal function prototypes
  ******************************************************************/

 /**
  * @brief Performs complete SHA1 algorithm.
  *
  * @param input  Pointer to buffer containing the input message.
  * @param digest Pointer to digest to update.
  * @param len	  Length of buffer.
  * @returns None
  */
 void sha1_for_mh_sha1(const uint8_t * input_data, uint32_t * digest, const uint32_t len);

 /*******************************************************************
  * mh_sha1 API internal function prototypes
  * Multiple versions of Update and Finalize functions are supplied which use
  * multiple versions of block and tail process subfunctions.
  ******************************************************************/

 /**
  * @brief  Tail process for multi-hash sha1.
  *
  * Calculate the remainder of input data which is less than MH_SHA1_BLOCK_SIZE.
  * It will output the final SHA1 digest based on mh_sha1_segs_digests.
  *
  * This function determines what instruction sets are enabled and selects the
  * appropriate version at runtime.
  *
  * @param  partial_buffer Pointer to the start addr of remainder
  * @param  total_len The total length of all sections of input data.
  * @param  mh_sha1_segs_digests The digests of all 16 segments .
  * @param  frame_buffer Pointer to buffer which is a temp working area
  * @returns none
  *
  */
 void mh_sha1_tail(uint8_t *partial_buffer, uint32_t total_len,
			 uint32_t (*mh_sha1_segs_digests)[HASH_SEGS],
			 uint8_t *frame_buffer, uint32_t mh_sha1_digest[SHA1_DIGEST_WORDS]);

 /**
  * @brief  Tail process for multi-hash sha1.
  *
  * Calculate the remainder of input data which is less than MH_SHA1_BLOCK_SIZE.
  * It will output the final SHA1 digest based on mh_sha1_segs_digests.
  *
  * @param  partial_buffer Pointer to the start addr of remainder
  * @param  total_len The total length of all sections of input data.
  * @param  mh_sha1_segs_digests The digests of all 16 segments .
  * @param  frame_buffer Pointer to buffer which is a temp working area
  * @param  mh_sha1_digest mh_sha1 digest
  * @returns none
  *
  */
 void mh_sha1_tail_base(uint8_t *partial_buffer, uint32_t total_len,
			 uint32_t (*mh_sha1_segs_digests)[HASH_SEGS],
			 uint8_t *frame_buffer, uint32_t mh_sha1_digest[SHA1_DIGEST_WORDS]);

 /**
  * @brief  Tail process for multi-hash sha1.
  *
  * Calculate the remainder of input data which is less than MH_SHA1_BLOCK_SIZE.
  * It will output the final SHA1 digest based on mh_sha1_segs_digests.
  *
  * @requires SSE
  *
  * @param  partial_buffer Pointer to the start addr of remainder
  * @param  total_len The total length of all sections of input data.
  * @param  mh_sha1_segs_digests The digests of all 16 segments .
  * @param  frame_buffer Pointer to buffer which is a temp working area
  * @param  mh_sha1_digest mh_sha1 digest
  * @returns none
  *
  */
 void mh_sha1_tail_sse(uint8_t *partial_buffer, uint32_t total_len,
			 uint32_t (*mh_sha1_segs_digests)[HASH_SEGS],
			 uint8_t *frame_buffer, uint32_t mh_sha1_digest[SHA1_DIGEST_WORDS]);

 /**
  * @brief  Tail process for multi-hash sha1.
  *
  * Calculate the remainder of input data which is less than MH_SHA1_BLOCK_SIZE.
  * It will output the final SHA1 digest based on mh_sha1_segs_digests.
  *
  * @requires AVX
  *
  * @param  partial_buffer Pointer to the start addr of remainder
  * @param  total_len The total length of all sections of input data.
  * @param  mh_sha1_segs_digests The digests of all 16 segments .
  * @param  frame_buffer Pointer to buffer which is a temp working area
  * @param  mh_sha1_digest mh_sha1 digest
  * @returns none
  *
  */
 void mh_sha1_tail_avx(uint8_t *partial_buffer, uint32_t total_len,
			 uint32_t (*mh_sha1_segs_digests)[HASH_SEGS],
			 uint8_t *frame_buffer, uint32_t mh_sha1_digest[SHA1_DIGEST_WORDS]);

 /**
  * @brief  Tail process for multi-hash sha1.
  *
  * Calculate the remainder of input data which is less than MH_SHA1_BLOCK_SIZE.
  * It will output the final SHA1 digest based on mh_sha1_segs_digests.
  *
  * @requires AVX2
  *
  * @param  partial_buffer Pointer to the start addr of remainder
  * @param  total_len The total length of all sections of input data.
  * @param  mh_sha1_segs_digests The digests of all 16 segments .
  * @param  frame_buffer Pointer to buffer which is a temp working area
  * @param  mh_sha1_digest mh_sha1 digest
  * @returns none
  *
  */
 void mh_sha1_tail_avx2(uint8_t *partial_buffer, uint32_t total_len,
			 uint32_t (*mh_sha1_segs_digests)[HASH_SEGS],
			 uint8_t *frame_buffer, uint32_t mh_sha1_digest[SHA1_DIGEST_WORDS]);

 /**
  * @brief  Tail process for multi-hash sha1.
  *
  * Calculate the remainder of input data which is less than MH_SHA1_BLOCK_SIZE.
  * It will output the final SHA1 digest based on mh_sha1_segs_digests.
  *
  * @requires AVX512
  *
  * @param  partial_buffer Pointer to the start addr of remainder
  * @param  total_len The total length of all sections of input data.
  * @param  mh_sha1_segs_digests The digests of all 16 segments .
  * @param  frame_buffer Pointer to buffer which is a temp working area
  * @param  mh_sha1_digest mh_sha1 digest
  * @returns none
  *
  */
 void mh_sha1_tail_avx512(uint8_t *partial_buffer, uint32_t total_len,
			 uint32_t (*mh_sha1_segs_digests)[HASH_SEGS],
			 uint8_t *frame_buffer, uint32_t mh_sha1_digest[SHA1_DIGEST_WORDS]);

 /**
  * @brief  Calculate mh_sha1 digest of blocks which size is MH_SHA1_BLOCK_SIZE*N.
  *
  * This function determines what instruction sets are enabled and selects the
  * appropriate version at runtime.
  *
  * @param  input_data Pointer to input data to be processed
  * @param  digests 16 segments digests
  * @param  frame_buffer Pointer to buffer which is a temp working area
  * @param  num_blocks The number of blocks.
  * @returns none
  *
  */
 void mh_sha1_block(const uint8_t * input_data, uint32_t digests[SHA1_DIGEST_WORDS][HASH_SEGS],
			 uint8_t frame_buffer[MH_SHA1_BLOCK_SIZE], uint32_t num_blocks);

 /**
  * @brief  Calculate mh_sha1 digest of blocks which size is MH_SHA1_BLOCK_SIZE*N.
  *
  * @param  input_data Pointer to input data to be processed
  * @param  digests 16 segments digests
  * @param  frame_buffer Pointer to buffer which is a temp working area
  * @param  num_blocks The number of blocks.
  * @returns none
  *
  */
 void mh_sha1_block_base(const uint8_t * input_data, uint32_t digests[SHA1_DIGEST_WORDS][HASH_SEGS],
			 uint8_t frame_buffer[MH_SHA1_BLOCK_SIZE], uint32_t num_blocks);

 /**
  * @brief  Calculate mh_sha1 digest of blocks which size is MH_SHA1_BLOCK_SIZE*N.
  *
  * @requires SSE
  * @param  input_data Pointer to input data to be processed
  * @param  digests 16 segments digests
  * @param  frame_buffer Pointer to buffer which is a temp working area
  * @param  num_blocks The number of blocks.
  * @returns none
  *
  */
 void mh_sha1_block_sse(const uint8_t * input_data, uint32_t digests[SHA1_DIGEST_WORDS][HASH_SEGS],
			 uint8_t frame_buffer[MH_SHA1_BLOCK_SIZE], uint32_t num_blocks);

 /**
  * @brief  Calculate mh_sha1 digest of blocks which size is MH_SHA1_BLOCK_SIZE*N.
  *
  * @requires AVX
  *
  * @param  input_data Pointer to input data to be processed
  * @param  digests 16 segments digests
  * @param  frame_buffer Pointer to buffer which is a temp working area
  * @param  num_blocks The number of blocks.
  * @returns none
  *
  */
 void mh_sha1_block_avx(const uint8_t * input_data, uint32_t digests[SHA1_DIGEST_WORDS][HASH_SEGS],
			 uint8_t frame_buffer[MH_SHA1_BLOCK_SIZE], uint32_t num_blocks);

 /**
  * @brief  Calculate mh_sha1 digest of blocks which size is MH_SHA1_BLOCK_SIZE*N.
  *
  * @requires AVX2
  *
  * @param  input_data Pointer to input data to be processed
  * @param  digests 16 segments digests
  * @param  frame_buffer Pointer to buffer which is a temp working area
  * @param  num_blocks The number of blocks.
  * @returns none
  *
  */
 void mh_sha1_block_avx2(const uint8_t * input_data, uint32_t digests[SHA1_DIGEST_WORDS][HASH_SEGS],
			 uint8_t frame_buffer[MH_SHA1_BLOCK_SIZE], uint32_t num_blocks);

 /**
  * @brief  Calculate mh_sha1 digest of blocks which size is MH_SHA1_BLOCK_SIZE*N.
  *
  * @requires AVX512
  *
  * @param  input_data Pointer to input data to be processed
  * @param  digests 16 segments digests
  * @param  frame_buffer Pointer to buffer which is a temp working area
  * @param  num_blocks The number of blocks.
  * @returns none
  *
  */
 void mh_sha1_block_avx512(const uint8_t * input_data, uint32_t digests[SHA1_DIGEST_WORDS][HASH_SEGS],
			 uint8_t frame_buffer[MH_SHA1_BLOCK_SIZE], uint32_t num_blocks);

#ifdef __cplusplus
}
#endif

#endif