#!/bin/sh -
#	$Id$
#
# Run just one C++ regression test, the single argument
# is the basename of the test, e.g. TestRpcServer

error()
{
	echo '' >&2
	echo "C++ regression error: $@" >&2
	echo '' >&2
	ecode=1
}

# compares the result against the good version,
# reports differences, and removes the result file
# if there are no differences.
#
compare_result()
{
	good="$1"
	latest="$2"
	if [ ! -e "$good" ]; then
		echo "Note: $good does not exist"
		return
	fi
	tmpout=/tmp/blddb$$.tmp
	diff "$good" "$latest" > $tmpout
	if [ -s $tmpout ]; then
		nbad=`grep '^[0-9]' $tmpout | wc -l`
		error "$good and $latest differ in $nbad places."
	else
		rm $latest
	fi
	rm -f $tmpout
}

ecode=0
stdinflag=n
gdbflag=n
CXX=${CXX:-c++}
LIBS=${LIBS:-}

# remove any -c option in the CXXFLAGS
CXXFLAGS="`echo " ${CXXFLAGS} " | sed -e 's/ -c //g'`"

# determine the prefix of the install tree
prefix=""
while :
do
	case "$1" in
	--prefix=* )
		prefix="`echo $1 | sed -e 's/--prefix=//'`"; shift
		LIBS="-L$prefix/lib -ldb_cxx $LIBS"
		CXXFLAGS="-I$prefix/include $CXXFLAGS"
	        export LD_LIBRARY_PATH="$prefix/lib:$LD_LIBRARY_PATH"
		;;
	--stdin )
		stdinflag=y; shift
		;;
	--gdb )
		CXXFLAGS="-g $CXXFLAGS"
		gdbflag=y; shift
		;;
        * )
		break
                ;;
	esac
done

if [ "$#" = 0 ]; then
	echo 'Usage: testone [ --prefix=<dir> | --stdin ] TestName'
        exit 1
fi
name="$1"

# compile
rm -rf TESTDIR; mkdir TESTDIR
cd ./TESTDIR

${CXX} ${CXXFLAGS} -o $name ../$name.cpp ${LIBS} > ../$name.compileout 2>&1
if [ $? != 0 -o -s ../$name.compileout ]; then
	error "compilation of $name failed, see $name.compileout"
	exit 1
fi
rm -f ../$name.compileout

# find input and error file
infile=../$name.testin
if [ ! -f $infile ]; then
	infile=/dev/null
fi

# run and diff results
rm -rf TESTDIR
if [ "$gdbflag" = y ]; then
	if [ -s $infile ]; then
		echo "Input file is $infile"
	fi
	gdb ./$name
        exit 0
elif [ "$stdinflag" = y ]; then
	./$name           >../$name.out 2>../$name.err
else
	./$name  <$infile >../$name.out 2>../$name.err
fi
cd ..

testerr=$name.testerr
if [ ! -f $testerr ]; then
	testerr=/dev/null
fi

testout=$name.testout
if [ ! -f $testout ]; then
	testout=/dev/null
fi

compare_result $testout $name.out
compare_result $testerr $name.err
rm -rf TESTDIR
exit $ecode