text: // Copyright (c) 2018 X-CASH Project, Derived from 2014-2018, The Monero Project
  // 
  // All rights reserved.
  // 
  // Redistribution and use in source and binary forms, with or without modification, are
  // permitted provided that the following conditions are met:
  // 
  // 1. Redistributions of source code must retain the above copyright notice, this list of
  //    conditions and the following disclaimer.
  // 
  // 2. Redistributions in binary form must reproduce the above copyright notice, this list
  //    of conditions and the following disclaimer in the documentation and/or other
  //    materials provided with the distribution.
  // 
  // 3. Neither the name of the copyright holder nor the names of its contributors may be
  //    used to endorse or promote products derived from this software without specific
  //    prior written permission.
  // 
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
  // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
  // THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  // INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  // STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
  // THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  
  #ifndef __hash_h
  #define __hash_h
  /*
  #include "crypto_uint8.h"
  #include "crypto_uint32.h"
  #include "crypto_uint64.h"
  #include "crypto_hash.h" 
  
  typedef crypto_uint8 uint8_t; 
  typedef crypto_uint32 uint32_t; 
  typedef crypto_uint64 uint64_t;
  */
  #include <stdint.h>
  
  /* some sizes (number of bytes) */
  #define ROWS 8
  #define LENGTHFIELDLEN ROWS
  #define COLS512 8
  
  #define SIZE512 (ROWS*COLS512)
  
  #define ROUNDS512 10
  #define HASH_BIT_LEN 256
  
  #define ROTL32(v, n) ((((v)<<(n))|((v)>>(32-(n))))&li_32(ffffffff))
  
  
  #define li_32(h) 0x##h##u
  #define EXT_BYTE(var,n) ((uint8_t)((uint32_t)(var) >> (8*n)))
  #define u32BIG(a)				\
    ((ROTL32(a,8) & li_32(00FF00FF)) |		\
     (ROTL32(a,24) & li_32(FF00FF00)))
  
  
  /* NIST API begin */
  typedef unsigned char BitSequence;
  typedef unsigned long long DataLength;
  typedef struct {
    uint32_t chaining[SIZE512/sizeof(uint32_t)];            /* actual state */
    uint32_t block_counter1,
    block_counter2;         /* message block counter(s) */
    BitSequence buffer[SIZE512];      /* data buffer */
    int buf_ptr;              /* data buffer pointer */
    int bits_in_last_byte;    /* no. of message bits in last byte of
  			       data buffer */
  } hashState;
  
  /*void Init(hashState*);
  void Update(hashState*, const BitSequence*, DataLength);
  void Final(hashState*, BitSequence*); */
  void groestl(const BitSequence*, DataLength, BitSequence*);
  /* NIST API end   */
  
  /*
  int crypto_hash(unsigned char *out,
  		const unsigned char *in,
  		unsigned long long len);
  */
  
  #endif /* __hash_h */
  