/*****************************************************************************
** main.c = main routine for Banzhaf power index computations
**
** Original version: Mark A. Livingston, 24 Dec 95
** Dept. of Computer Science, Univ. of North Carolina
**
** Last modification: 05 May 2000 (Added qualified majority switch)
** Hewlett-Packard Laboratories, Palo Alto, California
**
** Copyright (C) 1995--2000, Mark A. Livingston, The University of North
** Carolina at Chapel Hill, Hewlett-Packard Company
**
** Driver for the Banzhaf power index computation
*****************************************************************************/

#include <stdio.h>
#include <string.h>
#include "banzhaf.h"

void
usage( char *pname )
{
    printf( "Usage: %s [ options ]\n\n", pname );
    printf( "\tOptions are\n" );
    printf( "\t\t-v\t= turn on verbose mode\n" );
    printf( "\t\t-mN\t= set definition of \"majority\" to N votes\n" );
    printf( "\t\t-f <file>\t= read input data from <file>\n\n" );
    printf( "If no data file is specified on the command line, stdin is " );
    printf( "assumed.\n" );
    printf( "The data file consists of a line with a number of blocks,\n" );
    printf( "followed by one line for each block, with the format of\n\n" );
    printf( "\t<name> <population> <votes>\n\n" );

    return;
}

int
main( int argc, char *argv[] )
{
    int      i, count, majority;
    char    *fname = NULL;
    Boolean  done, verbose = False, setMajority = False;
    Block   *bl;

    /* check for correct usage */
    for( i = 1; i < argc; i++ ) {
      if( !strncmp( argv[i], "-v", 2 ) )
	verbose = True;
      else if( !strncmp( argv[i], "-m", 2 ) ) {
	setMajority = True;
	sscanf( argv[i], "-m%d", &majority );
      } else if( !strcmp( argv[i], "-f" ) )
	fname = argv[ ++i ];
      else {
	fprintf( stderr, "%s: Unknown argument '%s'\n", argv[0], argv[i] );
	usage( argv[0] );
	exit( -1 );
      }
    } /* end for( i ) */

    /* read the data */
    count = banzhafReadBlocks( fname, &bl );
    if( count <= 0 )
      exit( -2 );

    if( setMajority )
      banzhafSetMajority( majority );

    done = banzhafNextCoalition( bl, count, verbose );
    while( !done ) {
      if( banzhafHasCritical( bl, count ) )
	banzhafCountCritical( bl, count );
      done = banzhafNextCoalition( bl, count, verbose );
    } /* end while */

    banzhafComputeRatios( bl, count );

    banzhafPrintTable( bl, count );

    return 0;
}