#!/bin/sh

###############################################################################
#
# Author: Lasse Collin
#
# This file has been put into the public domain.
# You can do whatever you want with this file.
#
###############################################################################

# If xz wasn't built, this test is skipped.
if test -x ../src/xz/xz ; then
	:
else
	(exit 77)
	exit 77
fi

# Find out if our shell supports functions.
eval 'unset foo ; foo() { return 42; } ; foo'
if test $? != 42 ; then
	echo "/bin/sh doesn't support functions, skipping this test."
	(exit 77)
	exit 77
fi

test_xz() {
	if $XZ -c "$@" "$FILE" > tmp_compressed; then
		:
	else
		echo "Compressing failed: $* $FILE"
		(exit 1)
		exit 1
	fi

	if $XZ -cd tmp_compressed > tmp_uncompressed ; then
		:
	else
		echo "Decompressing failed: $* $FILE"
		(exit 1)
		exit 1
	fi

	if cmp tmp_uncompressed "$FILE" ; then
		:
	else
		echo "Decompressed file does not match" \
				"the original: $* $FILE"
		(exit 1)
		exit 1
	fi

	if test -n "$XZDEC" ; then
		if $XZDEC tmp_compressed > tmp_uncompressed ; then
			:
		else
			echo "Decompressing failed: $* $FILE"
			(exit 1)
			exit 1
		fi

		if cmp tmp_uncompressed "$FILE" ; then
			:
		else
			echo "Decompressed file does not match" \
					"the original: $* $FILE"
			(exit 1)
			exit 1
		fi
	fi
}

XZ="../src/xz/xz --memlimit-compress=48MiB --memlimit-decompress=5MiB \
		--no-adjust --threads=1 --check=crc64"
XZDEC="../src/xzdec/xzdec" # No memory usage limiter available
test -x ../src/xzdec/xzdec || XZDEC=

# Create the required input files.
if ./create_compress_files ; then
	:
else
	rm -f compress_*
	echo "Failed to create files to test compression."
	(exit 1)
	exit 1
fi

# Remove temporary now (in case they are something weird), and on exit.
rm -f tmp_compressed tmp_uncompressed
trap 'rm -f tmp_compressed tmp_uncompressed' 0

# Compress and decompress each file with various filter configurations.
# This takes quite a bit of time.
for FILE in compress_generated_* "$srcdir"/compress_prepared_*
do
	# Don't test with empty arguments; it breaks some ancient
	# proprietary /bin/sh versions due to $@ used in test_xz().
	test_xz -1
	test_xz -2
	test_xz -3
	test_xz -4

	for ARGS in \
		--delta=dist=1 \
		--delta=dist=4 \
		--delta=dist=256 \
		--x86 \
		--powerpc \
		--ia64 \
		--arm \
		--armthumb \
		--sparc
	do
		test_xz $ARGS --lzma2=dict=64KiB,nice=32,mode=fast
	done
done

(exit 0)
exit 0