property.i4.v = dio_prefix_char_to_property_c(chr.i1.v)

	This routine converts a device prefix character into a device
	property value.

	chr		device prefix character to convert

	This function returns status values as follows:

	DIO_BADARG		invalid device prefix character
	PRREAD			reading property
	PRSET			setting property
	PRBSTS			basic status property
	PRBCTL			basic control property
	PRANAB			analog alarm property
	PRDABL			digital alarm property

	This function requires the following include files:

	diolib_h, dbprops_h, acnet_errors_h

	Related functions:

	dio_property_to_prefix_char_c, dio_is_valid_device_name_first_char_c,
	dio_is_possible_device_name_c, dio_parse_long_device_name_c,
	dio_device_index(_c), dio_name_to_index, dio_dev_name(_c),
	dio_full_name_to_terse_name_c, dio_terse_name_to_full_name_c

	C/C++ usage:

	static char	device_name[DEVICE_TERSE_NAME_LEN] = "I_H100";
	int	property;

	property = dio_prefix_char_to_property_c(device_index[1]);