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An implementation of Unix dc and POSIX bc with GNU and BSD extensions
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#! /bin/sh
#
# SPDX-License-Identifier: BSD-2-Clause
#
# Copyright (c) 2018-2020 Gavin D. Howard and contributors.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice, this
# list of conditions and the following disclaimer.
#
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
export LANG=C
export LC_CTYPE=C
progname=${0##*/}
if [ $# -lt 4 ]; then
echo "usage: $progname input output name header [label [define [remove_tabs]]]"
exit 1
fi
input="$1"
output="$2"
name="$3"
header="$4"
label="$5"
define="$6"
remove_tabs="$7"
exec < "$input"
exec > "$output"
if [ -n "$label" ]; then
nameline="const char *${label} = \"${input}\";"
fi
if [ -n "$define" ]; then
condstart="#if ${define}"
condend="#endif"
fi
if [ -n "$remove_tabs" ]; then
if [ "$remove_tabs" -ne 0 ]; then
remtabsexpr='s: ::g;'
fi
fi
cat<<EOF
// Licensed under the 2-clause BSD license.
// *** AUTOMATICALLY GENERATED FROM ${input}. DO NOT MODIFY. ***
${condstart}
#include <${header}>
$nameline
const char ${name}[] =
$(sed -e "$remtabsexpr " -e '1,/^$/d; s:\\n:\\\\n:g; s:":\\":g; s:^:":; s:$:\\n":')
;
${condend}
EOF