Factor out common bit masking and printing code and use intermediate
strings to avoid buffer size handling.
Change-Id: I7d8c12df11ade6cdca8c917b5524372daa498bf4
Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-on: http://openocd.zylin.com/1496
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>