41 lines
1.2 KiB
Text
41 lines
1.2 KiB
Text
#
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# Chet Ramey <chet.ramey@case.edu>
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#
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# Copyright 1998 Chester Ramey
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2, or (at your option)
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# any later version.
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#
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# TThis program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software Foundation,
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# Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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isnum2()
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{
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case "$1" in
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'[-+]' | '') return 1;; # empty or bare `-' or `+'
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[-+]*[!0-9]*) return 1;; # non-digit with leading sign
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[-+]*) return 0;; # OK
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*[!0-9]*) return 1;; # non-digit
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*) return 0;; # OK
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esac
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}
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# this one handles floating point
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isnum3()
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{
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case "$1" in
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'') return 1;; # empty
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*[!0-9.+-]*) return 1;; # non-digit, +, -, or .
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*?[-+]*) return 1;; # sign as second or later char
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*.*.*) return 1;; # multiple decimal points
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*) return 0;; # OK
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esac
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}
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