s/^\s*typedef\s+(.*)(\(\*?\w+\))?\s*(\(.*\));.*$/typedef \1 \2 \3;/
t finish
s/^\s*typedef\s+(.*)(\(\*?\w+\))?\s*(\(.*,)/typedef \1 \2 \3/
T;h
:loop;n
/,$/ { H; b loop }
/;$/ { H;x}
:finish
s/\n//g
s/ {2,}/ /g
p