hex2dec


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#!/bin/bash

VERSION=20231128.01

# hex2dec -- Converts hexadecimal numbers to decimal numbers using only bash.
# Copyright (C) 2023 -- dreieck (https://aur.archlinux.org/account/dreieck)
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

if [ "$1" == "-V" ] || [ "$1" == "--version" ]; then
  printf "%s\n" "${VERSION}"
  exit 1
fi

for _hex in "$@"; do
  if [ "$(head -c2 <<<"${_hex,,}")" != "0x" ]; then
    _hex="0x${_hex}"
  fi
  printf '%02d' "${_hex}"
done

printf '\n'