str_expand_tabs_c

	expand_length.i4.v = str_expand_tabs_c(string.i1a.r, length.i4.v,
					       maximum_length.i4.v,
					       options.u4.v)

	This routine will expand any tab characters in a string and
	replace them with blanks.

	string		string to expand tab characters in
	length		length of string  (If this argument has a value
			of zero, the routine will determine the length
			of the string.)
	maximum_length	maximum length of expanded string
	options		use options
			(STR_OPT_NONE -> no options selected,
			 STR_OPT_NULL_TERMINATE -> null terminate the string)

	This function returns status values as follows:

	CLIB_INVARG		invalid length passed or maximum length
				is less than the current length
	otherwise		number of non-blank characters

	This function requires the following include files:

	cbslib_h, acnet_errors_h

	Related functions:

	str_make_printable_c, str_remove_nonprintables_c, str_remove_spaces_c,
	str_num_nonblank_c, str_is_blank_c, str_find_first_c, fndfst,
	str_get_first_c

	C/C++ usage:

	static char	string[] = "	Expand tabs in this string.";
	int	expand_length;
	int	length = 0;
	int	maximum_length = MAXIMUM_LENGTH;
	unsigned int	options = STR_OPT_NULL_TERMINATE;

	expand_length = str_expand_tabs_c(string,length,maximum_length,options);