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#
# Chet Ramey <chet.ramey@case.edu>
#
# 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
}
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