| #! /bin/sh |
| |
| : 'This file is in the public domain, so clarified as of' |
| : '2006-07-17 by Arthur David Olson.' |
| |
| : '@(#)yearistype.sh 8.2' |
| |
| case $#-$1 in |
| 2-|2-0*|2-*[!0-9]*) |
| echo "$0: wild year - $1" >&2 |
| exit 1 ;; |
| esac |
| |
| case $#-$2 in |
| 2-even) |
| case $1 in |
| *[24680]) exit 0 ;; |
| *) exit 1 ;; |
| esac ;; |
| 2-nonpres|2-nonuspres) |
| case $1 in |
| *[02468][048]|*[13579][26]) exit 1 ;; |
| *) exit 0 ;; |
| esac ;; |
| 2-odd) |
| case $1 in |
| *[13579]) exit 0 ;; |
| *) exit 1 ;; |
| esac ;; |
| 2-uspres) |
| case $1 in |
| *[02468][048]|*[13579][26]) exit 0 ;; |
| *) exit 1 ;; |
| esac ;; |
| 2-*) |
| echo "$0: wild type - $2" >&2 ;; |
| esac |
| |
| echo "$0: usage is $0 year even|odd|uspres|nonpres|nonuspres" >&2 |
| exit 1 |
