#!/bin/sh

# UnifyBoolean.sh
# Mon Mar 30 14:28:55 PDT 2009
# Chieh Cheng
# http://www.CynosureX.com/

# GNU General Public License (GPL) Version 2, June 1991

  scriptName=`basename "$0"`

  usage ()
  {
    echo "  Usage:   ${scriptName}"
    echo "             or"
    echo "           ${scriptName} value"
  }

  if [ $# -lt 2 ]
  then
    if [ $# -eq 1 ]
    then
      value="$1"
    else
      read value
    fi

    case "${value}" in
      [Tt][Rr][Uu][Ee]|[Tt]|[Yy][Ee][Ss]|[Yy]|1)
        result=1
        ;;

      [Ff][Aa][Ll][Ss][Ee]|[Ff]|[Nn][Oo]|[Nn]|0)
        result=0
        ;;

      *)
        result=`IsNumber.sh "${value}"`
        if [ ${result} -eq 1 ]
        then
          if [ ${value} -gt 0 ]
          then
            result=1
          else
            result=0
          fi
        else
          result=0
        fi
        ;;
    esac

    echo ${result}
  else
    usage
  fi