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#
# Copyright (c) 2016, 2017, 2018, 2019, 2020, 2021, 2022, 2023 Lucía Andrea Illanes Albornoz <lucia@luciaillanes.de>
# set +o errexit -o noglob -o nounset is assumed.
#
#
# rtl_export_vars() - export or unset list of variables
# @[-u]: unset instead of exporting variables
# @...: list of variable name-value pairs
#
# Returns: zero (0) on success, non-zero (>0) on failure
#
rtl_export_vars() {
local _rev_unsetfl=0;
if [ "x${1}" = "x-u" ]; then
_rev_unsetfl=1; shift;
fi;
while [ "${#}" -ge 2 ]; do
if [ "${2:+1}" = 1 ]\
|| [ "${_rev_unsetfl}" -eq 1 ]; then
case "${_rev_unsetfl}" in
0) rtl_set_var_unsafe "${1}" "${2}";
export "${1}"; ;;
1) unset "${1}"; ;;
esac;
fi; shift 2;
done;
return 0;
};
#
# rtl_percentage() - calculate percentage of two numbers
# @_in: input number
# @_max: input maximum
# @_rs_out: out reference to percentage number
#
# Returns: zero (0) on success, non-zero (>0) on failure
#
rtl_percentage() {
local _rp_in="${1}" _rp_max="${2}" _rp_rs_out="${3#\$}" \
_rp_perc;
_rp_perc=$((100 * ${_rp_in} + ${_rp_max} / 2));
_rp_perc=$((${_rp_perc} ? ${_rp_perc} / ${_rp_max} : ${_rp_perc}));
eval ${_rp_rs_out}='${_rp_perc}';
return 0;
};
#
# rtl_percentage2() - calculate percentage of two numbers
# @_rin: in reference to input number
# @_rmax: in reference to input maximum
# @_rs_out: out reference to percentage number
#
# Returns: zero (0) on success, non-zero (>0) on failure
#
rtl_percentage2() {
local _rp_rin="${1#\$}" _rp_rmax="${2#\$}" _rp_rs_out="${3#\$}" \
_rp_in=0 _rp_max=0 _rp_perc;
eval _rp_in=\"\${${_rp_rin}}\";
eval _rp_max=\"\${${_rp_rmax}}\";
_rp_perc=$((100 * ${_rp_in} + ${_rp_max} / 2));
_rp_perc=$((${_rp_perc} ? ${_rp_perc} / ${_rp_max} : ${_rp_perc}));
eval ${_rp_rs_out}='${_rp_perc}';
return 0;
};
#
# rtl_sunset() - unset variables
# @_rset: in reference to list of variables to unset
#
# Returns: zero (0) on success, non-zero (>0) on failure
#
rtl_sunset() {
local _rs_rset="${1#\$}" \
IFS=" ";
eval set -- "\${${_rs_rset}}";
while [ "${#}" -gt 0 ]; do
unset "${_rs_rset}"; shift;
done; unset "${_rs_rset}";
return 0;
};
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