count.c

FERET人脸库的处理代码。内函预处理

/*________________________________________________________________
  count.c
  Ali J. Azarbayejani 17 March 1994 (originated)

  CONTENTS:

  DESCRIPTION:
    Outputs a list of formatted numbers, intended for the
    following UNIX use.

    foreach i (`count -start 0 -end 9 -inc 1`) ... end
    foreach i (`count -fmt %.3d`) ... end
  ________________________________________________________________*/

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

struct {
  char	*progname;
  int	verbose;
  float	start;
  float	end;
  float	inc;
  char	*fmt;
}

params = {
  "", 0, 1., 1., 1., "%d"
};

static void
  alert( char *s )
{
  fprintf( stderr, "%s: %s\n", params.progname, s );
}

static void
  error( char *s )
{
  alert( s );
  exit( -1 );
}

static void
  usage( int argc, char **argv )
{
  static char *flags = "[-v] [-start #] [-end #] [-inc #] [-fmt <string>]";
  static char *io    = "> (# # # ...)";
  static char *help  = "foreach i (`count -end 10`) ...";

  fprintf( stderr, "usage: %s %s\n\t%s\n%s", argv[0], flags, io, help );
  exit(-1);
}

static void
  parse_command_line( int argc, char **argv )
{
  int		i;

  params.progname = argv[0];

  for(i=1; i<argc; i++) {
    if( !strcmp(argv[i], "-v") )
      params.verbose = 1;
    else if( !strcmp(argv[i], "-start") )
      params.start = atof( argv[++i] );
    else if( !strcmp(argv[i], "-end") )
      params.end = atof( argv[++i] );
    else if( !strcmp(argv[i], "-inc") )
      params.inc = atof( argv[++i] );
    else if( !strcmp(argv[i], "-fmt") )
      params.fmt = argv[++i];
    else
      usage( argc, argv );
  }
}

main( int argc, char **argv )
{
  /* Main variables */
  int count;
  float fcount;

  /* First command */
  parse_command_line( argc, argv );

  if( params.verbose )
    fprintf( stderr, "Start= %f, End= %f, Inc= %f\n",
	    params.start, params.end, params.inc );

  if( params.start > params.end )
    error( "bad args" );
  
  switch( params.fmt[ strlen(params.fmt)-1 ] ) {
   case 'd':
    if( params.verbose ) fprintf( stderr, "Integer\n" );
    for( count = params.start; count <= params.end; count += params.inc ) {
      printf( params.fmt, count );
      printf( " " );
    }
    break;
   case 'f': case 'g':
    if( params.verbose ) fprintf( stderr, "Float\n" );
    for( fcount = params.start; fcount <= params.end; fcount += params.inc ) {
      printf( params.fmt, fcount );
      printf( " " );
    }
    break;
   default:
    fprintf( stderr, "Bad format type\n" );
  }

}