# # Chet Ramey # # Copyright 1998 Chester Ramey # # 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 2, or (at your option) # any later version. # # TThis 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, write to the Free Software Foundation, # Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. isnum2() { case "$1" in '[-+]' | '') return 1;; # empty or bare `-' or `+' [-+]*[!0-9]*) return 1;; # non-digit with leading sign [-+]*) return 0;; # OK *[!0-9]*) return 1;; # non-digit *) return 0;; # OK esac } # this one handles floating point isnum3() { case "$1" in '') return 1;; # empty *[!0-9.+-]*) return 1;; # non-digit, +, -, or . *?[-+]*) return 1;; # sign as second or later char *.*.*) return 1;; # multiple decimal points *) return 0;; # OK esac }