#!/bin/sh
# Check characters outside the Unicode BMP in the search string.

# Copyright 2021-2023 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 <https://www.gnu.org/licenses/>.

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

require_en_utf8_locale_
require_compiled_in_MB_support

case $(uname -s) in
  CYGWIN*)
    skip_ 'surrogate-pair search string on Cygwin, where it cannot work';;
esac

fail=0

LC_ALL=en_US.UTF-8
export LC_ALL

# On platforms like 32-bit AIX where WCHAR_MAX == 0xFFFF, skip this check,
# since the corresponding Unicode characters are not supported.
printf '\360\220\200\200\n' >in || framework_failure_
grep '^.$' in >out || fail=1
compare in out || skip_ 'platform does not support U+10000'

printf '\360\220\220\205\n' > in || framework_failure_

for opt in '' -i -E -F -iE -iF; do
  grep --file=in $opt in > out 2>&1 || fail=1
  compare in out || fail=1
done

Exit $fail