#!/bin/sh

# Copyright (C) 2000-2018 Free Software Foundation, Inc.

# This file is part of the GNU C Library.

# Contributed by Bruno Haible <haible@clisp.cons.org>, 2000.

#

# The GNU C Library is free software; you can redistribute it and/or

# modify it under the terms of the GNU Lesser General Public

# License as published by the Free Software Foundation; either

# version 2.1 of the License, or (at your option) any later version.

# The GNU C 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 the GNU C Library; if not, see

# <http://www.gnu.org/licenses/>.

# Checks that the iconv() implementation (in both directions) for a

# stateless encoding agrees with the charmap table.

common_objpfx=$1

objpfx=$2

test_program_prefix=$3

charset=$4

charmap=$5

# sort is used on the build system.

LC_ALL=C

export LC_ALL

set -e

# Get the charmap.

./tst-table-charmap.sh ${charmap:-$charset} \

  < ../localedata/charmaps/${charmap:-$charset} \

  > ${objpfx}tst-${charset}.charmap.table

# When the charset is GB18030, truncate this table because for this encoding,

# the tst-table-from and tst-table-to programs scan the Unicode BMP only.

if test ${charset} = GB18030; then

  grep '0x....$' < ${objpfx}tst-${charset}.charmap.table \

    > ${objpfx}tst-${charset}.truncated.table

  mv ${objpfx}tst-${charset}.truncated.table ${objpfx}tst-${charset}.charmap.table

fi

# Precomputed expexted differences between the charmap and iconv forward.

precomposed=${charset}.precomposed

# Precompute expected differences between the charmap and iconv backward.

if test ${charset} = EUC-TW; then

  irreversible=${objpfx}tst-${charset}.irreversible

  (grep '^0x8EA1' ${objpfx}tst-${charset}.charmap.table

   cat ${charset}.irreversible

  ) > ${irreversible}

else

  irreversible=${charset}.irreversible

fi

# iconv in one direction.

${test_program_prefix} \

${objpfx}tst-table-from ${charset} \

  > ${objpfx}tst-${charset}.table

# iconv in the other direction.

${test_program_prefix} \

${objpfx}tst-table-to ${charset} | sort \

  > ${objpfx}tst-${charset}.inverse.table

# Difference between the charmap and iconv backward.

diff ${objpfx}tst-${charset}.charmap.table ${objpfx}tst-${charset}.inverse.table | \

  grep '^[<>]' | sed -e 's,^. ,,' > ${objpfx}tst-${charset}.irreversible.table

# Check 1: charmap and iconv forward should be identical, except for

# precomposed characters.

if test -f ${precomposed}; then

  cat ${objpfx}tst-${charset}.table ${precomposed} | sort | uniq -u \

    > ${objpfx}tst-${charset}.tmp.table

  cmp -s ${objpfx}tst-${charset}.charmap.table ${objpfx}tst-${charset}.tmp.table ||

  exit 1

else

  cmp -s ${objpfx}tst-${charset}.charmap.table ${objpfx}tst-${charset}.table ||

  exit 1

fi

# Check 2: the difference between the charmap and iconv backward.

if test -f ${irreversible}; then

  cat ${objpfx}tst-${charset}.charmap.table ${irreversible} | sort | uniq -u \

    > ${objpfx}tst-${charset}.tmp.table

  cmp -s ${objpfx}tst-${charset}.tmp.table ${objpfx}tst-${charset}.inverse.table ||

  exit 1

else

  cmp -s ${objpfx}tst-${charset}.charmap.table ${objpfx}tst-${charset}.inverse.table ||

  exit 1

fi

exit 0