#!/bin/sh

while [ $# != 0 ]
do
    case $1 in
	-h) 
	echo "usage: m-specific <mode> <infile> [<outfile>]"
	echo
	echo " <mode>   : can be octave or matlab"
	echo " <infile> : can be - in order to use stdin"
	echo
	echo " If no <outfile> is specified, stdout is used"
	exit 0;;

	-*)
	echo "m-specific: unknown option $1"
	echo 'try `m-specific -h'"'"' for help'
	exit 1;;

	*) break;;
    esac
    shift
done

if [ $# -lt 2 ]  || [ $# -gt 3 ] ; then
    echo "usage: m-specific <mode> <infile> [<outfile>]"
    echo
    echo " <mode>   : can be octave or matlab"
    echo " <infile> : can be - in order to use stdin"
    echo
    echo " If no <outfile> is specified, stdout is used"
    exit 1
fi

fo=""
foname="stdout"
md=$1
fi=$2

if [ $# = 3 ] ; then
    foname=$3
    fo="> $3"
fi

case $md in
    matlab) 
	echo "m-specific: matlabifying $fi to $foname" 1>&2
	;;
    octave)
	echo "m-specific: octavifying $fi to $foname" 1>&2
	;;

    *)
	echo "m-specific: unknown mode '$md'"
	exit 1
	;;
esac

tempfile=/tmp/mspec.$$

cat > $tempfile <<'EOF'
m4_define(`filename',m4_ifdef(`filename',filename,<unspecified>))m4_dnl Give a default filename
m4_define(in_octave,m4_ifdef(`octave',`
% ===========================================================================
% Source file: filename
% Mode: Octave
% ===========================================================================
$1
% ==========================================================================='))m4_dnl Definition du mode octave
m4_define(in_matlab,m4_ifdef(`matlab',`
% ===========================================================================
% Source file: filename
% Mode: Matlab
% ===========================================================================
$1
% ==========================================================================='))m4_dnl Definition du mode matlab
m4_undefine(octave)m4_dnl	Remove unnecessary macros
m4_undefine(matlab)m4_dnl
m4_undefine(filename)m4_dnl
m4_changequote(&$@&,&$@&)m4_dnl Weird quotes to be sure it won't be used by mistake
EOF

eval /usr/local/bin/m4 --prefix-builtins -D$md -Dfilename=$fi $tempfile $fi $fo

rm -f $tempfile