#!/bin/sh

# MonthToNumeric.sh
# Mon Jul 28 21:32:25 GMT 2008
# Chieh Cheng
# http://www.CynosureX.com/

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

  scriptName=`basename "$0"`

toNumeric ()
{
  str="$1"
  length=`StrLen.sh "${str}"`

  if [ ${length} -gt 3 ]
  then
    tmp=`SubStr.sh "${str}" 0 3`
    str="${tmp}"
  fi

  m=`echo "${str}" | tr '[A-Z]' '[a-z]'`

  case ${m} in
    jan) result="01";;
    feb) result="02";;
    mar) result="03";;
    apr) result="04";;
    may) result="05";;
    jun) result="06";;
    jul) result="07";;
    aug) result="08";;
    sep) result="09";;
    oct) result="10";;
    nov) result="11";;
    dec) result="12";;
    *) result="99";;
#    *) reportError "Bad month: ${m}!"; result="99";;
  esac

  return "${result}"
}

usage ()
{
  echo "  Usage:   ${scriptName} [ -p ] \"Month in Three or More Letters\""
  echo
  echo "             -p    Pad leading zero."
}

  padZero=0

  if [ $# -eq 2 ]
  then
    if [ "$1" = "-p" ]
    then
      padZero=1
      shift
    fi
  fi

  if [ $# -eq 1 ]
  then
    month="$1"
    toNumeric "${month}"
    num=$?

    if [ ${num} -lt 10 -a ${padZero} -eq 1 ]
    then
      echo "0${num}"
    else
      echo ${num}
    fi
  else
    usage
  fi