summaryrefslogtreecommitdiffstats
path: root/examples/functions/substr2
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--examples/functions/substr299
1 files changed, 99 insertions, 0 deletions
diff --git a/examples/functions/substr2 b/examples/functions/substr2
new file mode 100644
index 0000000..fc21b98
--- /dev/null
+++ b/examples/functions/substr2
@@ -0,0 +1,99 @@
+#
+# 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 == remove shortest from left
+# -L == remove longest from left
+# -r == remove shortest from right (the default)
+# -R == remove longest from right
+
+substr()
+{
+ local flag pat str
+ local usage="usage: substr -lLrR pat string or substr string pat"
+ local options="l:L:r:R:"
+
+ OPTIND=1
+ while getopts "$options" c
+ do
+ case "$c" in
+ l | L | r | R)
+ flag="-$c"
+ pat="$OPTARG"
+ ;;
+ '?')
+ echo "$usage"
+ return 1
+ ;;
+ esac
+ done
+
+ if [ "$OPTIND" -gt 1 ] ; then
+ shift $(( $OPTIND -1 ))
+ fi
+
+ if [ "$#" -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
+}