#!/bin/sh

usage()

{

cat << EOF >&2

Usage:

  -h            show this HELP message

  -p  PERK      set pe parser utility

  -o  OUTPUT    set output file name

  -l  SYSLIB    set system library from which to extract symbols

EOF

exit 1

}

# one

perk=

caps=

workdir=$(pwd)

output=

syslib=

while getopts "hp:o:l:c" opt; do

	case $opt in

	h)

  		usage

		;;

	p)

    		perk="$OPTARG"

		;;

	o)

    		output="$OPTARG"

		;;

	l)

    		syslib="$OPTARG"

		;;

	c)

		caps='yes'

		;;

	\?)

    		printf "$0: Invalid option: -%s" "$OPTARG" >&2

    		usage

		;;

	esac

done

# two

if [ -z "$perk" ] || [ -z "$output" ] || [ -z "$syslib" ]; then

	usage

fi

tmpdef=`mktemp`

if [ -z "$tmpdef" ]; then

	printf "$0: Failed to create a temporary file!" >&2

	exit 1

fi

# three

if [ -z "$caps" ]; then

	"$perk" -e "$syslib"                   > "$tmpdef" || exit 1

else

	"$perk" -e "$syslib" | grep -e '[A-Z]' > "$tmpdef" || exit 1

fi

# four

grep -v                                      \

		-e 'DllMain'                 \

		-e 'DllCanUnloadNow'         \

		-e 'DllDebugObjectRPCHook'   \

		-e 'DllGetClassObject'       \

		-e 'DllRegisterServer'       \

		-e 'DllUnregisterServer'     \

		-e '?'                       \

	"$tmpdef" > "$output" || exit 1

# all done

exit 0