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#! /bin/sh
#
# Copyright (c) 2018-2023 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.
#
# Tests the timeconst.bc script from the Linux kernel build.
# You can find the script at kernel/time/timeconst.bc in any Linux repo.
# One such repo is: https://github.com/torvalds/linux
script="$0"
testdir=$(dirname "$script")
outputdir=${BC_TEST_OUTPUT_DIR:-$testdir/..}
# Just print the usage and exit with an error. This can receive a message to
# print.
# @param 1 A message to print.
usage() {
if [ $# -eq 1 ]; then
printf '%s\n\n' "$1"
fi
printf 'usage: %s [timeconst_script] [exec args...]\n' "$0"
exit 1
}
. "$testdir/../../scripts/functions.sh"
# Gets the timeconst script, which could be a command-line argument. I don't
# need to check for error because we just skip if it doesn't work.
if [ "$#" -gt 0 ]; then
timeconst="$1"
shift
else
timeconst="$testdir/scripts/timeconst.bc"
fi
# Gets the executable, which could also be a command-line argument.
if [ "$#" -gt 0 ]; then
bc="$1"
shift
check_exec_arg "$bc"
else
bc="$testdir/../../bin/bc"
check_exec_arg "$bc"
fi
out1="$outputdir/bc_outputs/bc_timeconst.txt"
out2="$outputdir/bc_outputs/bc_timeconst_results.txt"
outdir=$(dirname "$out1")
# Make sure the directory exists.
if [ ! -d "$outdir" ]; then
mkdir -p "$outdir"
fi
base=$(basename "$timeconst")
# If the script does not exist, just skip. Running this test is not necessary.
if [ ! -f "$timeconst" ]; then
printf 'Warning: %s does not exist\n' "$timeconst"
printf 'Skipping...\n'
exit 0
fi
# I use these, so unset them to make the tests work.
unset BC_ENV_ARGS
unset BC_LINE_LENGTH
unset DC_ENV_ARGS
unset DC_LINE_LENGTH
printf 'Running %s...' "$base"
# Get a list of numbers. Funny how bc can help with that.
nums=$(printf 'for (i = 0; i <= 1000; ++i) { i }\n' | bc)
# Run each number through the script.
for i in $nums; do
# Run the GNU bc on the test.
printf '%s\n' "$i" | bc -q "$timeconst" > "$out1"
err="$?"
# If the other bc failed, it's not GNU bc, or this bc.
if [ "$err" -ne 0 ]; then
printf '\nOther bc is not GNU compatible. Skipping...\n'
exit 0
fi
# Run the built bc on the test.
printf '%s\n' "$i" | "$bc" "$@" -q "$timeconst" > "$out2"
diff "$out1" "$out2"
error="$?"
# If fail, bail.
if [ "$error" -ne 0 ]; then
printf '\nFailed on input: %s\n' "$i"
exit "$error"
fi
done
rm -f "$out1"
rm -f "$out2"
exec printf 'pass\n'
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