parse-header-constants

#!/usr/bin/env bash
#
# parse-header-constants v1.1
#
# Written By: Derek Callaway [decal (AT) sdf {D0T} org]
# Last Updated: Sat Apr 21 10:03:33 PDT 2018
# Tested On: Ubuntu 16.04.3 LTS
# Darwin 17.5.0 Darwin Kernel Version 17.5.0: Mon Mar 5 22:24:32 PST 2018; root:xnu-4570.51.1~1/RELEASE_X86_64 x86_64 i386
# Use Case: parse-header-constants /usr/include
#

if [ ! "$1" ]
 then echo 
 echo "usage: $0 INCDIR"
 echo
 echo ' INCDIR include directory where header files are to be found'
 echo
 echo ex. $0 /usr/include
 echo

 exit 1
fi

find $1 -type f -iname '*.h' -exec egrep '^[#]define ' {} \; | \
 awk '{print$2}' | egrep '^[A-Z]+' | grep -v '(' | sort -u 

exit 0