acpi_ut_insert_digit
status = acpi_ut_insert_digit(&accumulated_value, 10, *string);
acpi_ut_insert_digit(u64 *accumulated_value, u32 base, int ascii_digit);
status = acpi_ut_insert_digit(&accumulated_value, 16, *string);
status = acpi_ut_insert_digit(&accumulated_value, 8, *string);