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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:38:56 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 15:38:56 +0000
commit6c20c8ed2cb9ab69a1a57ccb2b9b79969a808321 (patch)
treef63ce19d57fad3ac4a15bc26dbfbfa2b834111b5 /examples/functions/substr
parentInitial commit. (diff)
downloadbash-6c20c8ed2cb9ab69a1a57ccb2b9b79969a808321.tar.xz
bash-6c20c8ed2cb9ab69a1a57ccb2b9b79969a808321.zip
Adding upstream version 5.2.15.upstream/5.2.15upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'examples/functions/substr')
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+#
+# Chet Ramey <chet.ramey@case.edu>
+#
+# Copyright 2002 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.
+#
+# substr -- a function to emulate the ancient ksh builtin
+#
+
+#
+# -l == shortest from left
+# -L == longest from left
+# -r == shortest from right (the default)
+# -R == longest from right
+
+substr()
+{
+ local flag pat str
+ local usage="usage: substr -lLrR pat string or substr string pat"
+
+ case "$1" in
+ -l | -L | -r | -R)
+ flag="$1"
+ pat="$2"
+ shift 2
+ ;;
+ -*)
+ echo "substr: unknown option: $1"
+ echo "$usage"
+ return 1
+ ;;
+ *)
+ flag="-r"
+ pat="$2"
+ ;;
+ esac
+
+ if [ "$#" -eq 0 ] || [ "$#" -gt 2 ] ; then
+ echo "substr: bad argument count"
+ return 2
+ fi
+
+ str="$1"
+
+ #
+ # We don't want -f, but we don't want to turn it back on if
+ # we didn't have it already
+ #
+ case "$-" in
+ "*f*")
+ ;;
+ *)
+ fng=1
+ set -f
+ ;;
+ esac
+
+ case "$flag" in
+ -l)
+ str="${str#$pat}" # substr -l pat string
+ ;;
+ -L)
+ str="${str##$pat}" # substr -L pat string
+ ;;
+ -r)
+ str="${str%$pat}" # substr -r pat string
+ ;;
+ -R)
+ str="${str%%$pat}" # substr -R pat string
+ ;;
+ *)
+ str="${str%$2}" # substr string pat
+ ;;
+ esac
+
+ echo "$str"
+
+ #
+ # If we had file name generation when we started, re-enable it
+ #
+ if [ "$fng" = "1" ] ; then
+ set +f
+ fi
+}