add input output file possibility

added lots of options

Author: codeon-nat

.gitignore

@@ -1,4 +1,5 @@
 kitchen/
 stash/
+build/
 var/
 dependency/

mulle-strip-whitespace

@@ -0,0 +1,114 @@
+#! /bin/sh
+#
+#   Copyright (c) 2021 Nat! - Mulle kybernetiK
+#   All rights reserved.
+#
+#   Redistribution and use in source and binary forms, with or without
+#   modification, are permitted provided that the following conditions are met:
+#
+#   Redistributions of source code must retain the above copyright notice, this
+#   list of conditions and the following disclaimer.
+#
+#   Redistributions in binary form must reproduce the above copyright notice,
+#   this list of conditions and the following disclaimer in the documentation
+#   and/or other materials provided with the distribution.
+#
+#   Neither the name of Mulle kybernetiK nor the names of its contributors
+#   may be used to endorse or promote products derived from this software
+#   without specific prior written permission.
+#
+#   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+#   AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+#   IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+#   ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+#   LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+#   CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+#   SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+#   INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+#   CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+#   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+#   POSSIBILITY OF SUCH DAMAGE.
+#
+[ "${TRACE}" = 'YES' ] && set -x && : "$0" "$@"
+
+
+
+####
+#
+# Prelude to be placed at top of each script. Rerun this script either in
+# bash or zsh, if not already running in either (which can happen!)
+# Allows script to run on systems that either have bash (linux) or
+# zsh (macOS) only by default.
+
+if [ "$1" != --no-auto-shell ]
+then
+   if [ -z "${BASH_VERSION}" -a -z "${ZSH_VERSION}" ]
+   then
+      exe_shell="`command -v "bash" `"
+      exe_shell="${exe_shell:-`command -v "zsh" `}"
+
+      script="$0"
+
+      #
+      # Quote incoming arguments for shell expansion
+      #
+      args=""
+      for arg in "$@"
+      do
+         # True bourne sh doesn't know ${a//b/c} and <<<
+         case "${arg}" in
+            *\'*)
+               # Use cat instead of echo to avoid possible echo -n
+               # problems. Escape single quotes in string.
+               arg="`cat <<EOF | sed -e s/\'/\'\\\"\'\\\"\'/g
+${arg}
+EOF
+`"
+            ;;
+         esac
+         if [ -z "${args}" ]
+         then
+            args="'${arg}'"
+         else
+            args="${args} '${arg}'"
+         fi
+      done
+
+      #
+      # bash/zsh will use arg after -c <arg> as $0, convenient!
+      #
+
+      exec "${exe_shell:-bash}" -c ". ${script} --no-auto-shell ${args}" "${script}"
+   fi
+   if [ ! -z "${BASH_VERSION}" ]
+   then
+      set +o posix
+   fi
+else
+   shift    # get rid of --no-auto-shell
+fi
+
+
+
+# https://stackoverflow.com/questions/369758/how-to-trim-whitespace-from-a-bash-variable
+r_trim_whitespace()
+{
+   RVAL="$*"
+   RVAL="${RVAL#"${RVAL%%[![:space:]]*}"}"
+   RVAL="${RVAL%"${RVAL##*[![:space:]]}"}"
+}
+
+#
+# This script merely strips off leading and trailing spaces from
+# the input. It may add an additional linefeed at the end if the input has
+# none.
+#
+text="`cat "$@"`"
+
+IFS=$'\n'
+while read -r line
+do
+   r_trim_whitespace "${line}"
+   printf "%s\n" "${RVAL}"
+done <<< "${text}"
+

src/Makefile-usage

@@ -0,0 +1,8 @@
+COMPILE=../kitchen/Debug/mulle-c-string-escape
+
+.PHONY:	all
+
+
+usage.inc:	usage.txt Makefile-usage
+	$(COMPILE) -0 -e -l 120  < $< > $@
+