#!/bin/sh

SEDSCRIPT='s|\\|\\\\|g;s|\"|\\\"|g'
NEWLINE_SCRIPT=':a;N;$!ba;s/\n/\\n/g;'

usage ()
{
  echo "shelltocstr [file]"
  echo ""
  echo "Transform shell scripts to fit into a C string"
  echo "Reads from stdin or from a file"
}


if [ -t 0 ]
then
  # not piped
  if [ -n "$1" ]
  then
    sed $SEDSCRIPT $1 | sed $NEWLINE_SCRIPT
  else
    usage
  fi
else
  # piped
  sed $SEDSCRIPT /dev/stdin | sed $NEWLINE_SCRIPT
fi