#!/bin/sh

# The MIT License (MIT)
#
# Copyright © 2020-2025 pacman64
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the “Software”), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.


# trimdecs [options...] [files...]
#
# TRIM DECimalS ignores all trailing decimal zeros in numbers, even the
# decimal dots themselves, when decimals in a number are all zeros
#
# The help option is `-h`, `--h`, `-help`, or `--help`.


# handle leading options
case "$1" in
    -h|--h|-help|--help)
        awk '/^# +trimdecs /, /^$/ { gsub(/^# ?/, ""); print }' "$0"
        exit 0
    ;;
esac

# works on gawk and busybox awk, but not on mawk, as the latter lacks `gensub`
# awk '
#     FNR == 1 { gsub(/^\xef\xbb\xbf/, "") }
#     {
#         gsub(/\r$/, "")
#         $0 = gensub(/([0-9]+)\.0+/, "\\1", "g")
#         $0 = gensub(/([0-9]+\.[0-9]*[1-9]+)0+/, "\\1", "g")
#         print; fflush()
#     }
# ' "$@"

awk '
    FNR == 1 { gsub(/^\xef\xbb\xbf/, "") }
    { gsub(/\r$/, ""); print; fflush() }
' "$@" | sed -u -E 's-([0-9]+)\.0+-\1-g; s-([0-9]+\.[0-9]*[1-9]+)0+-\1-g'