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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 06:17:24 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-27 06:17:24 +0000
commit9d8085074991d5c0a42d6fc96a2d1a3ee918aad1 (patch)
treec85bca1e6c11eb872edfc64c524d20f2b7e3307b /examples/functions/isnum2
parentInitial commit. (diff)
downloadbash-9d8085074991d5c0a42d6fc96a2d1a3ee918aad1.tar.xz
bash-9d8085074991d5c0a42d6fc96a2d1a3ee918aad1.zip
Adding upstream version 5.1.upstream/5.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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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
+}