dat2mat.sh

#!/bin/bash
################################################################################
# Script:	dat2mat.sh                                                     #
# Task:	        File to quickly convert a Tecplot .dat mesh file to a Matlab   #
#               .mat matrix file.  Takes in one or two inputs: if one input    #
#               given, will try to write output to a file in the same directory#
# Author:       David Welch                                                    #
# Contact:      david-welch@uiowa.edu                                          #
# Date:         12 June 2010                                                   #
# Licence:      Copyright (C) 2010 David Welch                                 #
#                                                                              #
# 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 3 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, see <http://www.gnu.org/licenses/>.                   #
#                                                                              #
################################################################################
################################################################################
#                                                                              #
#                             global variables                                 #
#                                                                              #
################################################################################
SCRIPTNAME=$(basename ${0} .sh)

# Number of parameters needed (Edit line 55 logic)
NUMOFPARAMS=2 

EXIT_SUCCESS=0
EXIT_FAILURE=1
EXIT_ERROR=2
EXIT_BUG=10

# variables for option switches with default values
VERBOSE="n"
OPTFILE=""
LICENSE="COPYING"

################################################################################
#                                                                              #
#                                 functions                                    #
#                                                                              #
################################################################################
function usage {
	echo "Usage: ${SCRIPTNAME} [-h] [-v] [-c] [-o arg] file ..." >&2
	[[ ${#} -eq 1 ]] && exit ${1} || exit ${EXIT_FAILURE}
}

function copyright {
        DIR=`find / -type d -name "name" 2>/dev/null`
        exec < "${DIR}/${LICENSE}"
        while read LINE ; do
                echo ${LINE}
        done
}

################################################################################
#                                                                              #
#                                main program                                  #
#                                                                              #
################################################################################

# the options -h for help should always be present. Options -v and
# -o are examples. -o needs a parameter, indicated by the colon ":"
# following in the getopts call
while getopts ':o:vhc' OPTION ; do
	case ${OPTION} in
        c)  copyright
            ;;
		v)	VERBOSE=y
			;;
		o)	OPTFILE="${OPTARG}"
			;;
		h)	usage ${EXIT_SUCCESS}
			;;
		\?)	echo "unknown option \"-${OPTARG}\"." >&2
			usage ${EXIT_ERROR}
			;;
		:)	echo "option \"-${OPTARG}\" requires an argument." >&2
			usage ${EXIT_ERROR}
			;;
		*)	echo "Impossible error. parameter: ${OPTION}" >&2
			usage ${EXIT_BUG}
			;;
	esac
done

# skip parsed options
shift $(( OPTIND - 1 ))

# if you want to check for a minimum or maximum number of arguments,
# do it here
if [[ $# -ne $NUMOFPARAMS ]] ; then
	if [[ $# -ne 1 ]] ; then
	echo "Wrong number of parameters" >&2
	usage ${EXIT_ERROR}
	fi
	outputFile="${1:(-4)}.mat";
else
	outputFile="$2";
fi

echo "$1 -> $outputFile"

if [[ ! ${1:(-4)} == ".dat" ]] ; then
    echo "Input format is incorrect!" >&2
    usage ${EXIT_ERROR}
fi

# loop through all arguments
for ARG ; do
	if [[ ${VERBOSE} = y ]] ; then
		echo -n "argument: " $ARG; echo
	fi
done

sed -e '1 d' -e s/"ZONE N="// -e s/",E="/"\ "/ -e s/",F=FEPOINT,ET=TRIANGLE"// <${1} >${outputFile}

exit ${EXIT_SUCCESS}