#ifndef __hash_h
#define __hash_h

#include <stdio.h>
#include <stdlib.h>
#include "brg_endian.h"
#include "brg_types.h"

/* some sizes (number of bytes) */
#define grsoROWS 8
#define grsoLENGTHFIELDLEN grsoROWS
#define grsoCOLS 16
#define grsoSIZE (grsoROWS*grsoCOLS)
#define grsoDIGESTSIZE 64

#define grsoROUNDS 14

#define grsoROTL64(a,n) ((((a)<<(n))|((a)>>(64-(n))))&((u64)0xffffffffffffffffULL))

#if (PLATFORM_BYTE_ORDER == IS_BIG_ENDIAN)
#error
#endif /* IS_BIG_ENDIAN */

#if (PLATFORM_BYTE_ORDER == IS_LITTLE_ENDIAN)
#define EXT_BYTE(var,n) ((u8)((u64)(var) >> (8*n)))
#define grsoU64BIG(a)				\
  ((grsoROTL64(a, 8) & ((u64)0x000000ff000000ffULL)) |	\
   (grsoROTL64(a,24) & ((u64)0x0000ff000000ff00ULL)) |	\
   (grsoROTL64(a,40) & ((u64)0x00ff000000ff0000ULL)) |	\
   (grsoROTL64(a,56) & ((u64)0xff000000ff000000ULL)))
#endif /* IS_LITTLE_ENDIAN */

typedef struct {
  u64 grsstate[grsoCOLS];             /* actual state */
  u64 grsblock_counter;           /* message block counter */
  int grsbuf_ptr;                 /* data buffer pointer */
} grsoState;

//extern int grsoInit(grsoState* ctx); 
//extern int grsoUpdate(grsoState* ctx, const unsigned char* in,
//	   unsigned long long len);
//extern int grsoUpdateq(grsoState* ctx, const unsigned char* in);
//extern int grsoFinal(grsoState* ctx,
//	  unsigned char* out); 
//
//extern int grsohash(unsigned char *out,
//		const unsigned char *in,
//		unsigned long long len);

/* digest up to len bytes of input (full blocks only) */
void grsoTransform( grsoState *ctx, const unsigned char *in,
                            unsigned long long len );

/* given state h, do h <- P(h)+h */
void grsoOutputTransformation( grsoState *ctx );

int grso_init ( grsoState* sts_grs );
int grso_update ( grsoState* sts_grs, char* hashbuf, char* hash );
int grso_close ( grsoState *sts_grs, char* hashbuf, char* hash );


#endif /* __hash_h */