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#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
#
# Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
silent=0
level=0
ifs=( )
while IFS= read -r line; do
if [[ $line =~ ^[[:space:]]*(#if.*) ]]; then
ifs[level++]=0
if [[ ${BASH_REMATCH[1]} == "#ifndef COMPAT_CANNOT_"* ]]; then
ifs[level-1]=-1
continue
elif [[ ${BASH_REMATCH[1]} == "#ifdef COMPAT_CANNOT_"* ]]; then
ifs[level-1]=1
((++silent))
continue
fi
elif [[ $line =~ ^[[:space:]]*#else && ${ifs[level-1]} -ne 0 ]]; then
((ifs[level-1]*=-1))
((silent+=ifs[level-1]))
continue
elif [[ $line =~ ^[[:space:]]*#endif ]]; then
((--level))
[[ ${ifs[level]} -eq 1 ]] && ((--silent))
[[ ${ifs[level]} -ne 0 ]] && continue
fi
[[ $silent -eq 0 ]] && printf '%s\n' "$line"
done < "$1" | clang-format -style="{ColumnLimit: 10000}"
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