I have an include file that has 50+ #defines with constants (0,1,2,3,…,etc). I have a dump program to dump the data structure that these #defines are used in into a .csv file. I used this little script to dump case statements out for the #defines, with readable strings instead of arbitrary constant values.

cat $1 | awk '/#define/{
   print "ttcase " $2 ":";
   print "tttfprintf(out_csv_fp,"," $2 "");";
   print "tttbreak;";
}' > out.txt