time/yearistype

   1 #! /bin/sh
   2
   3 : '@(#)yearistype.sh    7.3'
   4
   5 case $#-$2 in
   6         2-even)         case $1 in
   7                                 *[24680])                       exit 0 ;;
   8                                 *)                              exit 1 ;;
   9                         esac ;;
  10         2-nonpres)      case $1 in
  11                                 *[02468][048]|*[13567][26])     exit 1 ;;
  12                                 *)                              exit 0 ;;
  13                         esac ;;
  14         2-odd)          case $1 in
  15                                 *[13579])                       exit 0 ;;
  16                                 *)                              exit 1 ;;
  17                         esac ;;
  18         2-uspres)       case $1 in
  19                                 *[02468][048]|*[13567][26])     exit 0 ;;
  20                                 *)                              exit 1 ;;
  21                         esac ;;
  22         2-*)            echo "$0: wild type - $2" >&2
  23                         exit 1 ;;
  24         *)              echo "$0: usage is $0 year type" >&2
  25                         exit 1 ;;
  26 esac