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