#!/bin/sh

# $Id: m4.sh,v 1.2 2000/12/05 21:23:50 cph Exp $
#
# Copyright (c) 2000 Massachusetts Institute of Technology
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or (at
# your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

# Processing to simulate m4 accepting definition arguments.

if [ $# = 0 ]
then
  sed -e '/^#/D' | m4 | sed -e 's/@/$/g' -e 's/^$//'
else
  TMP_FILE="m4.tmp"
  SEEN_INPUT=0
  rm -f "${TMP_FILE}"
  while [ $# != 0 ]; do
    if [ "${1}" = "-P" ]; then
      echo "define(${2})" >> "${TMP_FILE}"
      shift
    else
      SEEN_INPUT=1
      sed -e '/^#/D' < "${1}" >> "${TMP_FILE}"
    fi
    shift
  done
  if [ ${SEEN_INPUT} -eq 0 ]; then
    sed -e '/^#/D' >> "${TMP_FILE}"
  fi
  m4 < "${TMP_FILE}" | sed -e 's/@/$/g' -e 's/^$//'
  rm -f "${TMP_FILE}"
fi