#!/bin/sh
#
# Wrapper script for edg to simulate most common gcc flags
#
# This is not perfectly exact but should be good enough for most cases in
# practice :)
# @author: Matthias Braun
#

EDGFLAGS="-b vrfy=assert -b ra-chordal-vrfy=assert --gnu=30305 --c -I/usr/lib/gcc-lib/i586-suse-linux/3.3.5/include"

ASSEMBLEFLAGS=""
AS=as-intel-2.17
OPT0="-fno-opt"
OPT1=""
OPT2="-fno-strength-red"
OPT3="-fif-conv -finline -fno-strength-red"
#OPT3="-finline -fno-strength-red"

mode=LINK
declare -a LFLAGS
declare -a CPPFLAGS
declare -a CFLAGS
declare -a CFILES
declare -a SFILES
declare -a OFILES
OPTFLAGS=""
OUTFILE=""
DEBUG=""
CFLAGS=()
LFLAGS=()
# parse commandline
while [ -n "$1" ]
do
	case "$1" in
		-S )	mode=COMPILE;;
		-c )	mode=ASSEMBLE;;
		-E )	mode=PREPROCESS;;
		-b )	shift ; CFLAGS=("${CFLAGS[@]}" -b "$1");;
		-b* )	CFLAGS=("${CFLAGS[@]}" "$1");;
		-o )	shift ; OUTFILE="$1";;
		-o* )	OUTFILE="`echo "$1" | sed -e "s/^-o//"`";;
		-v )	DEBUG="1";;
		--version )	echo "eccp version 0.1"; exit 0;;
		-Wl,* )	;; # TODO
		-Wa,* ) ;;
		-Wp,* ) ;;
		-l )	LFLAGS=("${LFLAGS[@]}" "-l $1");;
		-L )	LFLAGS=("${LFLAGS[@]}" "-L $1");;
		-l* | -L* )	LFLAGS=("${LFLAGS[@]}" "$1");;
		-W* )	;; #TODO
		-f )	shift;;
		-f* )	;; #TODO
		-march=* )	;;# TODO
		-g* )	;; # TODO
		-pipe ) ;;
		-MF ) shift;; # TODO
		-MT ) shift;; # TODO
		-MD | -MP | -MM | -MG ) ;;
		-I ) shift; CPPFLAGS=("${CPPFLAGS[@]}" "-I $1");;
		-D ) shift; CPPFLAGS=("${CPPFLAGS[@]}" "-D $1");;
		-D* | -I* )	CPPFLAGS=("${CPPFLAGS[@]}" "$1");;
		-O0 )	OPTFLAGS="$OPT0";;
		-O | -O1 )	OPTFLAGS="$OPT1";;
		-O2 )	OPTFLAGS="$OPT2";;

		-O* )	OPTFLAGS="$OPT3";;

		-*	)   echo "WARNING: Unknown option $1" >& 2; exit 1;;

		*.c )	CFILES=("${CFILES[@]}" "$1");;
		*.s )	SFILES=("${SFILES[@]}" "$1");;
		*.o )	OFILES=("${OFILES[@]}" "$1");;
		* )	echo "WARNING: file format $1 not recognized" >&2;
			exit 1;;
	esac
	shift
done
CFLAGS=("${CFLAGS[@]}" $OPTFLAGS)

if [ "$DEBUG" == "1" ]; then
	echo "OPTFLAGS ${OPTFLAGS}"
	echo "CFLAGS ${CFLAGS[*]}"
	echo "CPPFLAGS ${CPPFLAGS[*]}"
	echo "LFLAGS ${LFLAGS[*]}"
	echo "CFILES ${CFILES[*]}"
	echo "SFILES ${SFILES[*]}"
	echo "OFILES ${OFILE[*]}"
	echo "OUTFILE $OUTFILE"
fi

if [ "$mode" = "LINK" -a "$OUTFILE" = "" ] ; then
	OUTFILE="a.out"
fi

if [ "$mode" = "PREPROCESS" ] ; then
	for cfile in "${CFILES[@]}"; do
		OUTFLAGS=""
		if [ -n "$OUTFILE" ] ; then
			OUTFLAGS="-o$OUTFILE"
		fi

		if [ "$DEBUG" = "1" ]; then
			echo gcc -E "${CPPFLAGS[@]}" "$cfile" "$OUTFLAGS"
		fi
		gcc -E "${CPPFLAGS[@]}" "$cfile" "$OUTFLAGS" || exit $?
	done
	exit 0
fi

if [ "$mode" = "COMPILE" -o "$mode" = "ASSEMBLE" -o $mode = "LINK" ] ; then
	for cfile in "${CFILES[@]}"; do
		if [ -n "$OUTFILE" -a "$mode" = "COMPILE" ] ; then
			sfile="$OUTFILE"
		else
			sfile="`dirname "$cfile"`/`basename "$cfile" .c`.s"
		fi

		if [ "$DEBUG" = "1" ]; then
			echo edg $EDGFLAGS "${CPPFLAGS[@]}" "${CFLAGS[@]}" "$cfile" -o "$sfile"
		fi
		edg $EDGFLAGS "${CPPFLAGS[@]}" "${CFLAGS[@]}" "$cfile" || exit $?

		SFILES=("${SFILES[@]}" "$sfile")
	done
fi

if [ "$mode" = "ASSEMBLE" -o "$mode" = "LINK" ] ; then
	for sfile in "${SFILES[@]}"; do
		if [ -n "$OUTFILE" -a $mode = "ASSEMBLE" ] ; then
			ofile="$OUTFILE"
		else
			ofile="`dirname "$sfile"`/`basename "$sfile" .s`.o"
		fi
		if [ "$DEBUG" = "1" ]; then
			echo "$AS" $ASSEMBLEFLAGS "$sfile" -o "$ofile"
		fi
		"$AS" $ASSEMBLEFLAGS "$sfile" -o "$ofile" || exit $?
		OFILES=("${OFILES[@]}" "$ofile")
	done
fi

if [ $mode = "LINK" ] ; then
	if [ "$DEBUG" = "1" ]; then
		echo gcc ${LFLAGS[@]} ${OFILES[@]} -o "$OUTFILE"
	fi
	gcc ${LFLAGS[@]} ${OFILES[@]} -o "$OUTFILE"
fi