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#! /bin/sh
# Copyright (c) 2013 Sune Vuorela <sune@debian.org>
# Copyright (c) 2014 Lisandro Damián Nicanor Pérez Meyer <lisandro@debian.org>
# Copyright (c) 2015 Dmitry Shachnev <mitya57@debian.org>
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be included
# in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

# Usage:
# Define NODEBUG to avoid seeing which symbols are being processed.
# Define WRITERESULTS to actually mark the real symbols files.

error() {
	echo $@
	exit 1
}

debug() {
	[ ! -n "${NODEBUG}" ] && echo $@
}


# Check for the correct number of parameters.
if [ "$#" -lt 1 ]
then
	error "You must provide the path to the installed headers's directory."
fi

if [ "$#" -ne 1 ]
then
	error "This script only takes one argument."
fi

PRIVATE_HEADERS=$1

if [ ! -d ${PRIVATE_HEADERS} ]
then
	error "The path provided is not a directory."
fi

if [ ! -n "${WRITERESULTS}" ]
then
	# Create a backup copy of the original symbols file.
	for symbols_file in `ls debian/*.symbols`
	do
		cp $symbols_file $symbols_file.mps
	done
fi

# Unmark private symbols from the copies. This will
# help us find symbols that might have become public.
for symbols_file in `ls debian/*.symbols`
do
	if [ ! -n "${WRITERESULTS}" ]
	then
		sed -i 's/ 1$//g' $symbols_file.mps
	else
		sed -i 's/ 1$//g' $symbols_file
	fi
done

grep -rh class ${PRIVATE_HEADERS} |
	grep EXPORT |
	while read class export classname rest
	do
		classname=$(echo $classname | sed 's/://')
		echo ${#classname}${classname}
	done |
	while read privateclass
	do
		debug Marking ${privateclass} as private
		if [ -n "${WRITERESULTS}" ]
		then
			sed -i "s/\(.*${privateclass}[^ ]* *[^ ]*\)$/\1 1/" debian/*.symbols
		else
			sed -i "s/\(.*${privateclass}[^ ]* *[^ ]*\)$/\1 1/" debian/*.symbols.mps
		fi
	done

if [ ! -n "${WRITERESULTS}" ]
then
	# Diff the symbols files and output it's differences.
	for symbols_file in `ls debian/*.symbols`
	do
		diff -Nau $symbols_file $symbols_file.mps
	done
fi