tofmt.c

FERET人脸库的处理代码。内函预处理

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

  CONTENTS:

  DESCRIPTION:
  ________________________________________________________________*/

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

struct {
  char	*progname;
  int	verbose;
  char	*fmt;
  float	value;
  int	use_stdin;
}

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

static char *flags = "[-v] [-fmt <string>] [ [-] | [#] ]";
static char *io    = "< stream > stream";
static char *help  = "";

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 )
{
  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], "-fmt") )
      params.fmt = argv[++i];
    else if( !strcmp(argv[i], "-") )
      params.use_stdin = 1;
    else if( !strcmp(argv[i], "-help") )
      usage( argc, argv );
    else
      params.value = atoi( argv[i] );
  }
}

main( int argc, char **argv )
{
  /* Main variables */

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

  if( params.use_stdin )
    scanf( "%g", &params.value );

  switch( params.fmt[ strlen(params.fmt)-1 ] ) {
   case 'd':
    if( params.verbose ) fprintf( stderr, "Integer\n" );
    printf( params.fmt, (int) params.value );
    break;
   case 'f': case 'g':
    if( params.verbose ) fprintf( stderr, "Float\n" );
    printf( params.fmt, params.value );
    break;
   default:
    fprintf( stderr, "Bad format type\n" );
  }
}