cmp_tool.c

/**
 * @file   cmp_tool.c
 * @author Dominik Loidolt (dominik.loidolt@univie.ac.at)
 * @author Johannes Seelig (johannes.seelig@univie.ac.at)
 * @date   2020
 *
 * @copyright GPLv2
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * @brief command line tool for PLATO ICU/RDCU compression/decompression
 * @see README.md
 * @see Data Compression User Manual PLATO-UVIE-PL-UM-0001
 */

#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include <getopt.h>

#include "cmp_tool-config.h"
#include "cmp_io.h"
#include "cmp_icu.h"
#include "cmp_rdcu.h"
#include "decmp.h"
#include "cmp_guess.h"
#include "cmp_entity.h"
#include "rdcu_pkt_to_file.h"
#include "cmp_data_types.h"


#define BUFFER_LENGTH_DEF_FAKTOR 2

#define DEFAULT_MODEL_ID 53264  /* random default id */
#define DEFAULT_MODEL_COUNTER 0


/* parse a data_type option argument */
static enum cmp_data_type parse_data_type(const char *data_type_str);

/* find a good set of compression parameters for a given dataset */
static int guess_cmp_pars(struct cmp_cfg *cfg, const char *guess_cmp_mode,
			  int guess_level);

/* compress the data and write the results to files */
static int compression(struct cmp_cfg *cfg, struct cmp_info *info);

/* decompress the data and write the results in file(s)*/
static int decompression(struct cmp_entity *ent, uint16_t *input_model_buf);

/* create a default configuration for a compression data type */
enum cfg_default_opt {DIFF_CFG, MODEL_CFG};
static int cmp_cfg_create_default(struct cmp_cfg *cfg, enum cmp_data_type data_type,
				  enum cfg_default_opt mode);


/*
 * For long options that have no equivalent short option, use a
 * non-character as a pseudo short option, starting with CHAR_MAX + 1.
 */
enum {
	DIFF_CFG_OPTION = CHAR_MAX + 1,
	GUESS_OPTION,
	GUESS_LEVEL,