#!/bin/bash

#
# libseccomp test diff generator
#
# Copyright (c) 2013 Red Hat <pmoore@redhat.com>
# Author: Paul Moore <paul@paul-moore.com>
#

#
# This library is free software; you can redistribute it and/or modify it
# under the terms of version 2.1 of the GNU Lesser General Public License as
# published by the Free Software Foundation.
#
# This library is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
# for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this library; if not, see <http://www.gnu.org/licenses>.
#

####
# functions

#
# Print out script usage details
#
function usage() {
cat << EOF
usage: regression [-h] LABEL_1 LABEL_2

libseccomp test diff generator script
optional arguments:
  -h             show this help message and exit
EOF
}

#
# Print the test header
#
# Arguments:
#     1    string containing generated test number
#
function print_test() {
	printf "Test %s comparison:\n" "$1"
}

#
# Compare the tests
#
# Arguments:
#     1    string containing first test label
#     2    string containing second test label
#
function diff_tests() {
	local batch_name
	local label_a
	local label_b
	local file_a
	local file_b

	if [[ -n $1 ]]; then
		label_a=".$1"
	else
		label_a=""
	fi

	if [[ -n $2 ]]; then
		label_b=".$2"
	else
		label_b=""
	fi

	for file in *-sim-*.tests; do
		# extract the batch name from the file name
		batch_name=$(basename $file .tests)

		print_test "$batch_name"

		file_a="${batch_name}${label_a}"
		file_b="${batch_name}${label_b}"

		if [[ -r "$file_a.pfc" && -r "$file_b.pfc" ]]; then
			diff -pu "$file_a.pfc" "$file_b.pfc"
		fi

		if [[ -r "$file_a.bpf" && -r "$file_b.bpf" ]]; then
			diff -pu "$file_a.bpf" "$file_b.bpf"
		fi

		if [[ -r "$file_a.bpfd" && -r "$file_b.bpfd" ]]; then
			diff -pu "$file_a.bpfd" "$file_b.bpfd"
		fi
	done

	return
}

####
# main

opt_label=
opt_disasm=0

while getopts "h" opt; do
	case $opt in
	h|*)
		usage
		exit 1
		;;
	esac
done

stats_all=0
stats_failure=0

# display the test output and run the requested tests
echo "=============== $(date) ==============="
echo "Comparing Test Output (\"testdiff $*\")"
diff_tests "$1" "$2"
echo "============================================================"

# exit
exit 0
