/* This code is part of the tng compression routines.
 *
 * Written by Daniel Spangberg
 * Copyright (c) 2010, 2013, The GROMACS development team.
 *
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the Revised BSD License.
 */


#ifndef BWLZH_H
#define BWLZH_H

/* Compress the integers (positive, small integers are preferable)
   using bwlzh compression.  The unsigned char *output should be
   allocated to be able to hold worst case. You can obtain this length
   conveniently by calling comp_get_buflen()
*/
void DECLSPECDLLEXPORT bwlzh_compress(unsigned int *vals, const int nvals,
		  unsigned char *output, int *output_len);

void DECLSPECDLLEXPORT bwlzh_compress_no_lz77(unsigned int *vals, const int nvals,
		  unsigned char *output, int *output_len);

int DECLSPECDLLEXPORT bwlzh_get_buflen(const int nvals);

void DECLSPECDLLEXPORT bwlzh_decompress(unsigned char *input, const int nvals,
		    unsigned int *vals);


/* The routines below are mostly useful for testing, and for internal
   use by the library. */

void DECLSPECDLLEXPORT bwlzh_compress_verbose(unsigned int *vals, const int nvals,
			  unsigned char *output, int *output_len);

void DECLSPECDLLEXPORT bwlzh_compress_no_lz77_verbose(unsigned int *vals, const int nvals,
		  unsigned char *output, int *output_len);

void DECLSPECDLLEXPORT bwlzh_decompress_verbose(unsigned char *input, const int nvals,
			    unsigned int *vals);

/* Compress the integers (positive, small integers are preferable)
   using huffman coding, with automatic selection of how to handle the
   huffman dictionary.  The unsigned char *huffman should be allocated
   to be able to hold worst case. You can obtain this length
   conveniently by calling comp_huff_buflen()
*/
void Ptngc_comp_huff_compress(unsigned int *vals, const int nvals,
			unsigned char *huffman, int *huffman_len);

int Ptngc_comp_huff_buflen(const int nvals);

void Ptngc_comp_huff_decompress(unsigned char *huffman, const int huffman_len,
			  unsigned int *vals);


/* the value pointed to by chosen_algo should be
   sent as -1 for autodetect. */
void Ptngc_comp_huff_compress_verbose(unsigned int *vals, int nvals,
				unsigned char *huffman, int *huffman_len,
				int *huffdatalen,
				int *huffman_lengths,int *chosen_algo,
				const int isvals16);

#define N_HUFFMAN_ALGO 3
char *Ptngc_comp_get_huff_algo_name(const int algo);
char *Ptngc_comp_get_algo_name(const int algo);


#endif