#!/bin/sh
#
# XDriver System V IPC: replacement of XDriver fifos
#		(needed to improve speed and to run GRASS Monitors on Windows?)
# 
# Contact: Huidae Cho  <hdcho@geni.knu.ac.kr>
# 
# The source code from Ronald Wiemer (MessQ.tar.Z) is merged into
# the current driver code by Huidae Cho.
# 
# The updated files including the IPC are here:
#  src/display/devices/XDRIVER/XDRIVER24/ipc.new/
#  src/display/devices/XDRIVER/lib/ipc.new/
#  src/libes/raster/ipc.new/
#
# TODO: 
#  The updated driver has to be tested and finally made to be standard
#  driver.
#
# NOTE:
#  The $GISBASE/dev/fifo* files are still required. However, these files 
#  need not to be FIFO files. It's ok if these files are just zero size
#  file, not FIFO nor other special file. IPC drivers communicate through
#  these files.
#
# KNOWN BUGS:
#  Killing the monitor has to be done with d.mon stop=name. This is
#  the only way to get rid of the message-queues. If you destroy a monitor
#  without d.mon, the monitor will be unusable till your computer reboot,
#  maybe.
#############################################################################
#
# Please test new XDRIVER and report bugs to developers list.
#
#	./README.ipc new
#	
# Then you can revert to original XDRIVER.
#
#	./README.ipc orig
#
#############################################################################

SOURCES="
	src/display/devices/XDRIVER/XDRIVER24/IPC_NEW/SWITCHER.c
	src/display/devices/XDRIVER/lib/IPC_NEW/connect.c
	src/libes/raster/IPC_NEW/io.c
"

#############################################################################


if [ ! -f INSTALL -o ! -f NEWS.html -o "$0" != "./README.ipc" ]
then
	echo
	echo "This should be run under grass root directory."
	echo
	exit
fi

if [ ! -f config.status ]
then
	echo
	echo "You must ./configure first. Or GRASS is not installed."
	echo "Read INSTALL for more information."
	echo
	exit
fi

GISBASE=`grep "@prefix@" config.status | cut -d '%' -f 3`

if [ ! -d $GISBASE/dev ]
then
	echo
	echo "You must install GRASS first."
	echo "Read INSTALL for more information."
	echo
	exit
fi

which gmake5 > /dev/null 2>&1
if [ $? -ne 0 ]
then
	echo
	echo "gmake5 is not under \$PATH."
	echo
	exit
fi

if [ $# -eq 0 -o "$1" = "help" ]
then
	echo
	echo "Please read README.ipc first."
	echo
	echo "Usage:"
	echo " ./README.ipc [-n] [-f] [-m] [new|orig]"
	echo
	echo "   -n: Do not compile"
	echo "   -f: Force to compile"
	echo "   -m: Compile d.mon only"
	echo
	exit
fi

compile=1
dmon=0
sources=""
cmd=""
for i
do
	case $i in
		-n)
			compile=0
			sources=" sources"
			;;
		-f)
			compile=2
			sources=""
			;;
		-m)
			dmon=1
			if [ $compile -eq 0 ]
			then
				compile=1
			fi
			sources=""
			;;
		new|orig)
			cmd=$i
			;;
		*)
			echo
			echo "$i: Invalid argument"
			echo
			exit
			;;
	esac
	shift
done

if [ "$cmd" = "" ]
then
	echo
	echo "Using current sources"
	echo
fi

changed=0
if [ "$cmd" = "new" ]
then
	for i in $SOURCES
	do
		src=`echo $i | sed 's|IPC_NEW/||'`
		new=`echo $i | sed 's|IPC_NEW/|ipc.new/|'`
		diff $new $src > /dev/null 2>&1
		if [ $? -eq 0 ]
		then
			continue
		fi
		changed=1
		echo cp $new $src
		cp $new $src
	done
elif [ "$cmd" = "orig" ]
then
	for i in $SOURCES
	do
		src=`echo $i | sed 's|IPC_NEW/||'`
		org=`echo $i | sed 's|IPC_NEW/|fifo.orig/|'`
		diff $org $src > /dev/null 2>&1
		if [ $? -eq 0 ]
		then
			continue
		fi
		changed=1
		echo cp $org $src
		cp $org $src
	done
fi


if [ ! -f $GISBASE/dev/create_buffers.sh ]
then
	sed "s|@prefix@|$GISBASE|g" src/scripts/shells/create_buffers.sh.in > $GISBASE/dev/create_buffers.sh
	chmod 755 $GISBASE/dev/create_buffers.sh
fi

if [ ! -f $GISBASE/dev/create_fifos.sh ]
then
	sed "s|@prefix@|$GISBASE|g" src/scripts/shells/create_fifos.sh.in > $GISBASE/dev/create_fifos.sh
	chmod 755 $GISBASE/dev/create_fifos.sh
fi

if [ "$cmd" = "new" -a -p $GISBASE/dev/fifo.1a ]
then
	sh $GISBASE/dev/create_buffers.sh
elif [ "$cmd" = "orig" -a -f $GISBASE/dev/fifo.1a ]
then
	sh $GISBASE/dev/create_fifos.sh
fi

if [ $changed -eq 0 -a $compile -ne 2 -a "$cmd" != "" ]
then
	echo
	if [ "$cmd" = "new" ]
	then
		echo "It's already new driver$sources."
	elif [ "$cmd" = "orig" ]
	then
		echo "It's already original driver$sources."
	fi
	echo
	exit
fi


if [ $compile -eq 0 ]
then
	exit
fi

(cd src/display/devices/XDRIVER && gmake5)
(cd src/libes/raster && gmake5)

if [ $dmon -eq 1 ]
then
	(cd src/display/d.mon && gmake5)
else
	(cd src/display && gmake5)
	(cd src/raster && gmake5)
	(cd src/mapdev && gmake5)
	(cd src/paint/Drivers/preview && gmake5)
	(cd src/paint/Drivers/preview2 && gmake5)
fi


echo
echo "Thanks for your time."
echo "If you have more time, you might want to recompile entire sources. :-)"
echo