unpatch

#!/bin/bash
{

set +H -uo pipefail

function necho() {
printf -- '%s' "${@}"
}

function show_help() {
echo "Usage: ${0##*"/"} [EXE]
Modify Little Nightmares 2 to not work on Windows 7.

  -h, --help
        display this help and exit"
}

function is_not_done() {
local "LC_ALL" "LANG"
LC_ALL=C
LANG=C
if grep -obUaP -- "${edit}" "${1}" &>/dev/null; then
	return 1
else
	return 0
fi
}

function is_patchable() {
local "LC_ALL" "LANG"
LC_ALL=C
LANG=C
if grep -obUaP -- "${orig}" "${1}" &>/dev/null; then
	return 0
else
	return 1
fi
}

function echo_error() {
echo "${1}: FAILED"
code=1
}

case "${#},${1:-""},${2:-""}" in
	0,,|"1,-,"|"1,--,"|"1,/dev/stdin,"|"1,--,"|"2,--,-"|"2,--,/dev/stdin")
		exit 0
	;;
	"1,-h,"|"1,--h,"|"1,--help,")
		show_help
		exit 0
	;;
	"1,--version,")
		echo "${0##*"/"} 1.0.0"
		exit 0
	;;
	2,--,*?.[eE][xX][eE])
		shitf 1
	;;
	1,*?.[eE][xX][eE],)
		:
	;;
	*)
		show_help 1>&2
		exit 1
	;;
esac
orig='\x00\x84\xc0\xeb\x24\x4c\x8d\x05'
edit="${orig/'eb'/'75'}"
case "${1##*"/"}" in
	"Little_Nightmares_II_Enhanced-Win64-Shipping.exe"|"Little Nightmares II.exe")
		if type grep sed &>/dev/null; then
			if is_not_done "${1}"; then
				if is_patchable "${1}"; then
					if sed -i "s/${orig}/${edit}/" "${1}"; then
						echo "${0##*"/"}: ${1}: OK"
					else
						echo "${0##*"/"}: ${1}: FAILED"
						code=1
					fi
				else
					echo "${0##*"/"}: ${1}: Is not patchable back"
				fi
			else
				echo "${0##*"/"}: ${1}: Is already patched back"
			fi
		else
			echo "${0##*"/"}: please install: coreutils sed"
			code=1
		fi
	;;
	*?.[eE][xX][eE])
		echo "${0##*"/"}: ${1}: Is not Little Nigthmares 2"
		code=1
	;;
	*)
		:
	;;
esac
exit "${code:-"0"}"
}