getopt.c

这是著名的TCPMP播放器在WINDWOWS,和WINCE下编译通过的源程序.笔者对其中的LIBMAD库做了针对ARM MPU的优化. 并增加了词幕功能.

		      if (argv[share__optind - 1][1] == '-')
			/* --option */
			fprintf (stderr,
				 _("%s: option `--%s' doesn't allow an argument\n"),
				 argv[0], pfound->name);
		      else
			/* +option or -option */
			fprintf (stderr,
				 _("%s: option `%c%s' doesn't allow an argument\n"),
				 argv[0], argv[share__optind - 1][0], pfound->name);
		    }

		  nextchar += strlen (nextchar);

		  share__optopt = pfound->val;
		  return '?';
		}
	    }
	  else if (pfound->has_arg == 1)
	    {
	      if (share__optind < argc)
		share__optarg = argv[share__optind++];
	      else
		{
		  if (share__opterr)
		    fprintf (stderr,
			   _("%s: option `%s' requires an argument\n"),
			   argv[0], argv[share__optind - 1]);
		  nextchar += strlen (nextchar);
		  share__optopt = pfound->val;
		  return optstring[0] == ':' ? ':' : '?';
		}
	    }
	  nextchar += strlen (nextchar);
	  if (longind != NULL)
	    *longind = option_index;
	  if (pfound->flag)
	    {
	      *(pfound->flag) = pfound->val;
	      return 0;
	    }
	  return pfound->val;
	}

      /* Can't find it as a long option.  If this is not share__getopt_long_only,
	 or the option starts with '--' or is not a valid short
	 option, then it's an error.
	 Otherwise interpret it as a short option.  */
      if (!long_only || argv[share__optind][1] == '-'
	  || my_index (optstring, *nextchar) == NULL)
	{
	  if (share__opterr)
	    {
	      if (argv[share__optind][1] == '-')
		/* --option */
		fprintf (stderr, _("%s: unrecognized option `--%s'\n"),
			 argv[0], nextchar);
	      else
		/* +option or -option */
		fprintf (stderr, _("%s: unrecognized option `%c%s'\n"),
			 argv[0], argv[share__optind][0], nextchar);
	    }
	  nextchar = (char *) "";
	  share__optind++;
	  share__optopt = 0;
	  return '?';
	}
    }

  /* Look at and handle the next short option-character.  */

  {
    char c = *nextchar++;
    char *temp = my_index (optstring, c);

    /* Increment `share__optind' when we start to process its last character.  */
    if (*nextchar == '\0')
      ++share__optind;

    if (temp == NULL || c == ':')
      {
	if (share__opterr)
	  {
	    if (posixly_correct)
	      /* 1003.2 specifies the format of this message.  */
	      fprintf (stderr, _("%s: illegal option -- %c\n"),
		       argv[0], c);
	    else
	      fprintf (stderr, _("%s: invalid option -- %c\n"),
		       argv[0], c);
	  }
	share__optopt = c;
	return '?';
      }
    /* Convenience. Treat POSIX -W foo same as long option --foo */
    if (temp[0] == 'W' && temp[1] == ';')
      {
	char *nameend;
	const struct share__option *p;
	const struct share__option *pfound = NULL;
	int exact = 0;
	int ambig = 0;
	int indfound = 0;
	int option_index;

	/* This is an option that requires an argument.  */
	if (*nextchar != '\0')
	  {
	    share__optarg = nextchar;
	    /* If we end this ARGV-element by taking the rest as an arg,
	       we must advance to the next element now.  */
	    share__optind++;
	  }
	else if (share__optind == argc)
	  {
	    if (share__opterr)
	      {
		/* 1003.2 specifies the format of this message.  */
		fprintf (stderr, _("%s: option requires an argument -- %c\n"),
			 argv[0], c);
	      }
	    share__optopt = c;
	    if (optstring[0] == ':')
	      c = ':';
	    else
	      c = '?';
	    return c;
	  }
	else
	  /* We already incremented `share__optind' once;
	     increment it again when taking next ARGV-elt as argument.  */
	  share__optarg = argv[share__optind++];

	/* share__optarg is now the argument, see if it's in the
	   table of longopts.  */

	for (nextchar = nameend = share__optarg; *nameend && *nameend != '='; nameend++)
	  /* Do nothing.  */ ;

	/* Test all long options for either exact match
	   or abbreviated matches.  */
	for (p = longopts, option_index = 0; p->name; p++, option_index++)
	  if (!strncmp (p->name, nextchar, nameend - nextchar))
	    {
	      if ((unsigned int) (nameend - nextchar) == strlen (p->name))
		{
		  /* Exact match found.  */
		  pfound = p;
		  indfound = option_index;
		  exact = 1;
		  break;
		}
	      else if (pfound == NULL)
		{
		  /* First nonexact match found.  */
		  pfound = p;
		  indfound = option_index;
		}
	      else
		/* Second or later nonexact match found.  */
		ambig = 1;
	    }
	if (ambig && !exact)
	  {
	    if (share__opterr)
	      fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"),
		       argv[0], argv[share__optind]);
	    nextchar += strlen (nextchar);
	    share__optind++;
	    return '?';
	  }
	if (pfound != NULL)
	  {
	    option_index = indfound;
	    if (*nameend)
	      {
		/* Don't test has_arg with >, because some C compilers don't
		   allow it to be used on enums.  */
		if (pfound->has_arg)
		  share__optarg = nameend + 1;
		else
		  {
		    if (share__opterr)
		      fprintf (stderr, _("\
%s: option `-W %s' doesn't allow an argument\n"),
			       argv[0], pfound->name);

		    nextchar += strlen (nextchar);
		    return '?';
		  }
	      }
	    else if (pfound->has_arg == 1)
	      {
		if (share__optind < argc)
		  share__optarg = argv[share__optind++];
		else
		  {
		    if (share__opterr)
		      fprintf (stderr,
			       _("%s: option `%s' requires an argument\n"),
			       argv[0], argv[share__optind - 1]);
		    nextchar += strlen (nextchar);
		    return optstring[0] == ':' ? ':' : '?';
		  }
	      }
	    nextchar += strlen (nextchar);
	    if (longind != NULL)
	      *longind = option_index;
	    if (pfound->flag)
	      {
		*(pfound->flag) = pfound->val;
		return 0;
	      }
	    return pfound->val;
	  }
	  nextchar = NULL;
	  return 'W';	/* Let the application handle it.   */
      }
    if (temp[1] == ':')
      {
	if (temp[2] == ':')
	  {
	    /* This is an option that accepts an argument optionally.  */
	    if (*nextchar != '\0')
	      {
		share__optarg = nextchar;
		share__optind++;
	      }
	    else
	      share__optarg = NULL;
	    nextchar = NULL;
	  }
	else
	  {
	    /* This is an option that requires an argument.  */
	    if (*nextchar != '\0')
	      {
		share__optarg = nextchar;
		/* If we end this ARGV-element by taking the rest as an arg,
		   we must advance to the next element now.  */
		share__optind++;
	      }
	    else if (share__optind == argc)
	      {
		if (share__opterr)
		  {
		    /* 1003.2 specifies the format of this message.  */
		    fprintf (stderr,
			   _("%s: option requires an argument -- %c\n"),
			   argv[0], c);
		  }
		share__optopt = c;
		if (optstring[0] == ':')
		  c = ':';
		else
		  c = '?';
	      }
	    else
	      /* We already incremented `share__optind' once;
		 increment it again when taking next ARGV-elt as argument.  */
	      share__optarg = argv[share__optind++];
	    nextchar = NULL;
	  }
      }
    return c;
  }
}

int
share__getopt (argc, argv, optstring)
     int argc;
     char *const *argv;
     const char *optstring;
{
  return share___getopt_internal (argc, argv, optstring,
			   (const struct share__option *) 0,
			   (int *) 0,
			   0);
}

#endif	/* Not ELIDE_CODE.  */

#ifdef TEST

/* Compile with -DTEST to make an executable for use in testing
   the above definition of `share__getopt'.  */

int
main (argc, argv)
     int argc;
     char **argv;
{
  int c;
  int digit_optind = 0;

  while (1)
    {
      int this_option_optind = share__optind ? share__optind : 1;

      c = share__getopt (argc, argv, "abc:d:0123456789");
      if (c == -1)
	break;

      switch (c)
	{
	case '0':
	case '1':
	case '2':
	case '3':
	case '4':
	case '5':
	case '6':
	case '7':
	case '8':
	case '9':
	  if (digit_optind != 0 && digit_optind != this_option_optind)
	    printf ("digits occur in two different argv-elements.\n");
	  digit_optind = this_option_optind;
	  printf ("option %c\n", c);
	  break;

	case 'a':
	  printf ("option a\n");
	  break;

	case 'b':
	  printf ("option b\n");
	  break;

	case 'c':
	  printf ("option c with value `%s'\n", share__optarg);
	  break;

	case '?':
	  break;

	default:
	  printf ("?? getopt returned character code 0%o ??\n", c);
	}
    }

  if (share__optind < argc)
    {
      printf ("non-option ARGV-elements: ");
      while (share__optind < argc)
	printf ("%s ", argv[share__optind++]);
      printf ("\n");
    }

  exit (0);
}

#endif /* TEST */