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#!/bin/sh
#
############################################################################
#
# MODULE: r.mapcalc_wrapper
# AUTHOR(S): Martin Landa <landa.martin gmail.com>
# PURPOSE: Simulate standard g.parser interface for GUI
# COPYRIGHT: (C) 2011 by The GRASS Development Team
#
# 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.
#
############################################################################
#%module
#% description: Raster map calculator.
#% keywords: raster, algebra
#%end
#%option
#% key: expression
#% type: string
#% required: no
#% multiple: no
#% description: Expression to evaluate
#% guisection: Expression
#%end
#%option
#% key: file
#% type: string
#% required: no
#% multiple: no
#% key_desc: name
#% description: File containing expression(s) to evaluate
#% gisprompt: old_file,file,input
#% guisection: Expression
#%end
if [ -z "$GISBASE" ] ; then
echo "You must be in GRASS GIS to run this program." 1>&2
exit 1
fi
if [ "$1" != "@ARGS_PARSED@" ] ; then
exec g.parser "$0" "$@"
fi
if [ -n "$GIS_OPT_FILE" ] ; then
exec r.mapcalc < "$GIS_OPT_FILE"
else
if [ -n "$GIS_OPT_EXPRESSION" ] ; then
exec r.mapcalc "$GIS_OPT_EXPRESSION"
else
exec g.message -e message="Either <expression> or <file> option must be given"
exit 1
fi
fi
exit 0
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