#
# This script generates one of two files from a .X file:
#
# With the -h flag, it generates a .h file for inclusion in the class
# implementations file(s); the .h file contains declarations of
# method routines, declarations of class vectors, and the contents
# of the .X file (and .X  files it INCLUDEs) itself.
#
# With the -c flag, it generates a .c file that contains the contents
# of the class vectors, method routines, not-implemented routines,
# and Get...Class routines.  This should can be turned immediately
# into a .o file and deleted.
#

#
# Check/get arguments
#

if [ $# != 2 ]; then
    echo "Usage: $0 -ch file" 1>&2
    exit 1
fi

flag=$1
file=$2


#
# This routine recursively searches for
# and does the INCLUDE statements
#

out() {
    x=`basename $1 .X `
    echo "#ifndef __$x"
    echo "#define __$x"
    cat $1
    echo "#endif"
}

include() {
    incl=`sed -n -e "/^INCLUDE[ \t]*\(.*\)/s//\1/p" <$1`
    if [ -n "$incl" ]; then
        (include $incl)
	out $incl
    fi
}


#
# If we're generating the .c file, we set do_h so that the .h file
# is already included in the .c file, so we don't have to include
# it explicitly (which might be difficult, because we may not know
# its name).  Note that do_c is not set until just before we cat the
# base file; this allows the awk script to distinguish the base file
# from the others, so that it only generates the method routines and
# class vectors once, not each time the .X  file is INCLUDEd.
#
# For the .h file, we set do_h at the beginning, so that the .h file
# contains the contents of the .h files generated from all the other
# INCLUDEd .X  files, so once again we don't have to explicitly
# include the .h files of the superclasses, which is good because
# we may not know their names.  Note that this isn't a performance
# problem, since even if we #included the superclass .h files somehow,
# they would still be processed by the C compiler.
#

if [ $flag = "-c" ]; then
    (echo "#do_h"; include $file; echo "#do_c"; out $file) | awk -f class.awk
elif [ $flag = "-h" ]; then
    (echo "#do_h"; include $file; out $file) | awk -f class.awk
fi