status.i4.v = str_regexp_insert_string_c(source_string.i1a.r,

	This routine inserts a string before or after a string matching a
	regular expression in an input string.

	source_string	address of pointer to input string (This will be
			modified if the pattern is matched.)
	match_pattern	null terminated pattern to be searched for
			(If a value of NULL is passed for this argument,
			 the last pattern established will be used.)
	insert_string	null terminated string to be inserted
	insert_location	where to insert string
			(STR_ARG_BEFORE -> insert before the matching string,
			 STR_ARG_AFTER -> insert after the matching string)
	[options]	search options
			(STR_OPT_NONE -> no options selected (default),
			 STR_OPT_CASE_SENSITIVE -> case sensitive operation,
			 STR_OPT_USE_EXTENDED_REGEXP -> use extended regular
			 STR_OPT_TREAT_NL_AS_SPECIAL -> treat new lines as
							special characters in
							conjunction with '^' and
							'$' search characters)
	[next_string]	address of the next character in the source string
			following the inserted string
			(If a value of NULL is passed for this argument,
			no address will be returned.)
			(default is NULL)

	This function returns status values as follows:

	CLIB_INVARG		invalid argument passed
	CLIB_NOINIT		no search pattern esablished
	0			string not found
	positive number		index of where string was inserted
				(starts at 1)

	This function requires the following include files:

	cbslib_h, acnet_errors_h

	Related functions:

	str_insert_string_c, str_regexp_find_string_c,
	str_regexp_compile_pattern_c, str_regexp_free_pattern,
	str_regexp_remove_string_c, str_remove_string_c,
	str_regexp_compare, str_regexp_compare_nocase,
	str_find_string_c, str_find_last_string_c

	C/C++ usage:

	static char	source_string[] = "This is a string.";
	static const char	match_string[] = "is.*a";
	static const char	insert_string[] = " modified";
	char	*next_string;
	int	status;
	int	insert_location = STR_ARG_AFTER;
	unsigned int	options = STR_OPT_NONE;

	status = str_regexp_insert_string_c(source_string,match_string,