#!/bin/sh
# grep-2.17 would take nearly 200x longer to run the command below.
# The 200x is on an Intel i7-based system.
# On an AMD FX-4100, it would take up to 2500x longer.

# Copyright 2014 Free Software Foundation, Inc.

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program 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 General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

. "${srcdir=.}/init.sh"; path_prepend_ ../src
require_timeout_
require_hi_res_time_

fail=0

yes $(printf '%078d' 0) | head -50000 > in || framework_failure_

start=$(hi_res_time_)
LC_ALL=C grep -i foobar in; st=$?
stop=$(hi_res_time_)

# Use a multiple of the LC_ALL=C duration as the timeout for the JP/EUC test.
# A multiple of 3 seems to be enough for i5,i7, but AMD needs >25.
# Use an integer; some 'timeout' implementations have trouble with
# floating-point in JP_EUC locales.
timeout=$(
  $AWK 'BEGIN { print 1 + int (30 * ('$stop' - '$start'))}' < /dev/null
)

test $st = 1 || fail=1

require_JP_EUC_locale_

# Expect no match, i.e., exit status of 1.  Anything else is an error.
timeout $timeout grep -i foobar in; st=$?
test $st = 1 || fail=1

Exit $fail