/* Copyright (c) 2004 by Greg Lehey.
 *
 *  This software is distributed under the so-called ``Berkeley
 *  License'':
 *
 * 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.
 *
 * This software is provided ``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 company 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.
 *
 * $Id: abv.c,v 1.4 2004/01/23 03:04:00 grog Exp $ */

/*
 * Print a table of alcohol by volume or by weight against initial and
 * final gravities.
 */
#include <ctype.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/file.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <sys/types.h>
#include <unistd.h>
#include "beer.h"

double max_og = 1.100;
double og_step = 0.002;
double max_fg = 1.020;
double fg_step = 0.001;

int main (int argc, char *argv [])
{
  double OG;
  double FG;
  
  if (argc > 1)
    {
    fprintf (stderr, "No arguments, please\n");
    return 1;
    }
  
  printf ("The following table lists the values for three different\n"
	  "calculations of alcohol by volume based on different\n"
	  "formulae.  The first is calculated by the function\n"
	  "alcohol_by_weight_fix() from Domenick Venezia's library\n"
	  "functions.  The second is caculated by the function\n"
	  "alcohol_by_weight_AJ() from the same library.  The third is\n"
	  "the simple formula (SG - FG) x 133 proposed on the Oz\n"
	  "Craftbrewing list by Geoff Saunders <geoff@newtown.net.au>\n\n");

  printf ("OG\tFG...\n\n\t");
  for (FG = 1.000; FG < max_fg; FG += fg_step)
    printf ("%6.4f\t", FG);
  printf ("\n");
  for (OG = 1.000; OG < max_og; OG += og_step)
    {
    printf ("%6.4f\t", OG);
    for (FG = 1.000; (FG < OG) && (FG < max_fg); FG += fg_step)
      printf ("%6.4f\t", abw_to_abv (alcohol_by_weight_fix (OG, FG)) );
    printf ("\n");
    printf ("%6.4f\t", OG);
    for (FG = 1.000; (FG < OG) && (FG < max_fg); FG += fg_step)
      printf ("%6.4f\t", abw_to_abv (alcohol_by_weight_AJ (OG, FG)) );
    printf ("\n");
    printf ("%6.4f\t", OG);
    for (FG = 1.000; (FG < OG) && (FG < max_fg); FG += fg_step)
      printf ("%6.4f\t", (OG - FG) * 133);
    printf ("\n");
    printf ("\n");
    }
  return 0;
  }