An implementation of Unix dc and POSIX bc with GNU and BSD extensions. Finished, but well-maintained.
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#! /bin/sh
#
# SPDX-License-Identifier: BSD-2-Clause
#
# Copyright (c) 2018-2021 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.
#
readlink() {
_readlink_f="$1"
shift
_readlink_arrow="-> "
_readlink_d=$(dirname "$_readlink_f")
_readlink_lsout=""
_readlink_link=""
_readlink_lsout=$(ls -dl "$_readlink_f")
_readlink_link=$(printf '%s' "${_readlink_lsout#*$_readlink_arrow}")
while [ -z "${_readlink_lsout##*$_readlink_arrow*}" ]; do
_readlink_f="$_readlink_d/$_readlink_link"
_readlink_d=$(dirname "$_readlink_f")
_readlink_lsout=$(ls -dl "$_readlink_f")
_readlink_link=$(printf '%s' "${_readlink_lsout#*$_readlink_arrow}")
done
printf '%s' "${_readlink_f##*$_readlink_d/}"
}
err_exit() {
if [ "$#" -ne 2 ]; then
printf 'Invalid number of args to err_exit\n'
exit 1
fi
printf '%s\n' "$1"
exit "$2"
}
checktest_retcode() {
_checktest_retcode_d="$1"
shift
_checktest_retcode_err="$1"
shift
_checktest_retcode_name="$1"
shift
if [ "$_checktest_retcode_err" -ne 0 ]; then
printf 'FAIL!!!\n'
err_exit "$_checktest_retcode_d failed test '$_checktest_retcode_name' with error code $_checktest_retcode_err" 1
fi
}
checktest() {
_checktest_d="$1"
shift
_checktest_err="$1"
shift
_checktest_name="$1"
shift
_checktest_test_path="$1"
shift
_checktest_results_name="$1"
shift
checktest_retcode "$_checktest_d" "$_checktest_err" "$_checktest_name"
_checktest_diff=$(diff "$_checktest_test_path" "$_checktest_results_name")
_checktest_err="$?"
if [ "$_checktest_err" -ne 0 ]; then
printf 'FAIL!!!\n'
printf '%s\n' "$_checktest_diff"
err_exit "$_checktest_d failed test $_checktest_name" 1
fi
}
die() {
_die_d="$1"
shift
_die_msg="$1"
shift
_die_name="$1"
shift
_die_err="$1"
shift
_die_str=$(printf '\n%s %s on test:\n\n %s\n' "$_die_d" "$_die_msg" "$_die_name")
err_exit "$_die_str" "$_die_err"
}
checkcrash() {
_checkcrash_d="$1"
shift
_checkcrash_error="$1"
shift
_checkcrash_name="$1"
shift
if [ "$_checkcrash_error" -gt 127 ]; then
die "$_checkcrash_d" "crashed ($_checkcrash_error)" \
"$_checkcrash_name" "$_checkcrash_error"
fi
}
checkerrtest()
{
_checkerrtest_d="$1"
shift
_checkerrtest_error="$1"
shift
_checkerrtest_name="$1"
shift
_checkerrtest_out="$1"
shift
_checkerrtest_exebase="$1"
shift
checkcrash "$_checkerrtest_d" "$_checkerrtest_error" "$_checkerrtest_name"
if [ "$_checkerrtest_error" -eq 0 ]; then
die "$_checkerrtest_d" "returned no error" "$_checkerrtest_name" 127
fi
if [ "$_checkerrtest_error" -eq 100 ]; then
_checkerrtest_output=$(cat "$_checkerrtest_out")
_checkerrtest_fatal_error="Fatal error"
if [ "${_checkerrtest_output##*$_checkerrtest_fatal_error*}" ]; then
printf "%s\n" "$_checkerrtest_output"
die "$_checkerrtest_d" "had memory errors on a non-fatal error" \
"$_checkerrtest_name" "$_checkerrtest_error"
fi
fi
if [ ! -s "$_checkerrtest_out" ]; then
die "$_checkerrtest_d" "produced no error message" "$_checkerrtest_name" "$_checkerrtest_error"
fi
# Display the error messages if not directly running exe.
# This allows the script to print valgrind output.
if [ "$_checkerrtest_exebase" != "bc" -a "$_checkerrtest_exebase" != "dc" ]; then
cat "$_checkerrtest_out"
fi
}
substring_replace() {
_substring_replace_str="$1"
shift
_substring_replace_needle="$1"
shift
_substring_replace_replacement="$1"
shift
_substring_replace_result=$(printf '%s\n' "$_substring_replace_str" | \
sed -e "s!$_substring_replace_needle!$_substring_replace_replacement!g")
printf '%s' "$_substring_replace_result"
}
gen_nlspath() {
_gen_nlspath_nlspath="$1"
shift
_gen_nlspath_locale="$1"
shift
_gen_nlspath_execname="$1"
shift
_gen_nlspath_char="@"
_gen_nlspath_modifier="${_gen_nlspath_locale#*$_gen_nlspath_char}"
_gen_nlspath_tmplocale="${_gen_nlspath_locale%%$_gen_nlspath_char*}"
_gen_nlspath_char="."
_gen_nlspath_charset="${_gen_nlspath_tmplocale#*$_gen_nlspath_char}"
_gen_nlspath_tmplocale="${_gen_nlspath_tmplocale%%$_gen_nlspath_char*}"
if [ "$_gen_nlspath_charset" = "$_gen_nlspath_tmplocale" ]; then
_gen_nlspath_charset=""
fi
_gen_nlspath_char="_"
_gen_nlspath_territory="${_gen_nlspath_tmplocale#*$_gen_nlspath_char}"
_gen_nlspath_language="${_gen_nlspath_tmplocale%%$_gen_nlspath_char*}"
if [ "$_gen_nlspath_territory" = "$_gen_nlspath_tmplocale" ]; then
_gen_nlspath_territory=""
fi
if [ "$_gen_nlspath_language" = "$_gen_nlspath_tmplocale" ]; then
_gen_nlspath_language=""
fi
_gen_nlspath_needles="%%:%L:%N:%l:%t:%c"
_gen_nlspath_needles=$(printf '%s' "$_gen_nlspath_needles" | tr ':' '\n')
for _gen_nlspath_i in $_gen_nlspath_needles; do
_gen_nlspath_nlspath=$(substring_replace "$_gen_nlspath_nlspath" "$_gen_nlspath_i" "|$_gen_nlspath_i|")
done
_gen_nlspath_nlspath=$(substring_replace "$_gen_nlspath_nlspath" "%%" "%")
_gen_nlspath_nlspath=$(substring_replace "$_gen_nlspath_nlspath" "%L" "$_gen_nlspath_locale")
_gen_nlspath_nlspath=$(substring_replace "$_gen_nlspath_nlspath" "%N" "$_gen_nlspath_execname")
_gen_nlspath_nlspath=$(substring_replace "$_gen_nlspath_nlspath" "%l" "$_gen_nlspath_language")
_gen_nlspath_nlspath=$(substring_replace "$_gen_nlspath_nlspath" "%t" "$_gen_nlspath_territory")
_gen_nlspath_nlspath=$(substring_replace "$_gen_nlspath_nlspath" "%c" "$_gen_nlspath_charset")
_gen_nlspath_nlspath=$(printf '%s' "$_gen_nlspath_nlspath" | tr -d '|')
printf '%s' "$_gen_nlspath_nlspath"
}