#!/bin/sh

# Copyright (c) 2023, Alessandro Iezzi
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice, this
#    list of conditions and the following disclaimer.
#
# 2. 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.
#
# 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.

update()
{
	local file_type="`file $1 | grep -oE '(C source|makefile script)'`"

	if [ "$file_type" = "C source" ]; then
		start_symbol='\/\*-'
		mid_symbol=' *'
		end_symbol=' \*\/'
	elif [ "$file_type" = "makefile script" ]; then
		start_symbol='#-'
		mid_symbol='#'
		end_symbol='#'
	else
		return
	fi

	newcopy=`cat license-header.txt | sed -E "s/^/$mid_symbol /g" | sed -E "s/[ ]*$//g"`
	newcopy=$start_symbol"\n"$newcopy"\n"$end_symbol"\n"

	printf "$newcopy" > $tmp_file
	cat $src_file | sed -E "/$start_symbol$/,/$end_symbol/d" >> $tmp_file
	cat $tmp_file > $src_file
}

tmp_file=/tmp/file-`date +%s`

for src_file in `find * -name "*"`; do
	if [ -f $src_file ]; then
		update $src_file
	fi
done

rm -f $tmp_file

exit

oldcopy=`sed -n -E '/\/*-$/,/ \*\// p' $src_file`




oldcopy=`printf "$oldcopy" | sed 's@/@\\/@g' | sed 's/\*/\\*/g' | tr '\n' '\\\n'`



#sed -i "" "s/$oldcopy/$newcopy/g" $src_file