2022-04-19 03:36:29 +00:00
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#!/bin/sh
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# $1 = number
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# $2 = operator
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# $3 = number
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# $1 or increase or decrease while $3 will remain the same
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set -e # exit 1 if any error
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ceil() {
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# ceiling $1, compare to $2; return 1 if not the same
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[ -z "${1##*.*}" -o ! -z "${2##*.*}" ] && {
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[ ! -z "${1##*.*}" -a ! -z "${2##*.*}" -a "$1" -eq "$2" ] 2>/dev/null && exit 0
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set -- "${1%.*}" "${2%.*}"
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set -- "$(($1+1))" "$2"
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[ "$1" -eq "$2" ] 2>/dev/null && {
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exit 0
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} || return 1
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} || return 1
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} # ceiling
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floor() {
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# floor $1. compare to $2; return 1 if not the same
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[ -z "${1##*.*}" -o ! -z "${2##*.*}" ] && {
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[ ! -z "${1##*.*}" -a ! -z "${2##*.*}" -a "$1" -eq "$2" ] 2>/dev/null && exit 0
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set -- "${1%.*}" "${2%.*}"
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set -- "$(($1-1))" "$2"
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[ "$1" -eq "$2" ] 2>/dev/null && {
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exit 0
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} || return 1
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} || return 1
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} # floor
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gt() {
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2022-04-19 18:22:06 +00:00
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w1="${1%.*}"; w2="${2%.*}"
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d1="${1#*.}"; d2="${2#*.}"
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[ "$w1" -gt "$w2" ] && exit 0 # if whole number is greator no need to compare decimals
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# now compare $d1 to $d2
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# 0.10 > 0.01
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# 100 > 1
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until [ "${d1#0}" = "${d1}" ]; do
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d1="${d1#0}"; d2="${d2}0"
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done
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until [ "${d2#0}" = "${d2}" ]; do
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d2="${d2#0}"; d1="${d1}0"
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done
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[ "$3" ] && {
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[ "$d1" -gt "$d2" -o "$d1" -eq "$d2" -a "$w1" -eq "$w2" ] && {
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exit 0
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} || return 1
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} || {
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[ "$d1" -gt "$d2" ] && {
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exit 0
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} || return 1
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} # or equal to (-ge)
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} # test if $1 is > $2
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lt() {
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w1="${1%.*}"; w2="${2%.*}"
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d1="${1#*.}"; d2="${2#*.}"
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[ "$w1" -lt "$w2" ] && exit 0
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until [ "${d1#0}" = "${d1}" ]; do
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d1="${d1#0}"; d2="${d2}0"
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done
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until [ "${d2#0}" = "${d2}" ]; do
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d2="${d2#0}"; d1="${d1}0"
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done
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[ "$3" ] && {
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[ "$d1" -lt "$d2" -o "$d1" -eq "$d2" -a "$w1" -eq "$w2" ] && {
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exit 0
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} || return 1
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} || {
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[ "$d1" -lt "$d2" ] && {
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exit 0
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} || return 1
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}
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} # test if $1 is < $2
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eq() { # use $3 for -ne
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w1="${1%.*}"; w2="${2%.*}"
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d1="${1#*.}"; d2="${2#*.}"
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until [ "${d1#0}" = "${d1}" ]; do
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d1="${d1#0}"; d2="${d2}0"
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done
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until [ "${d2#0}" = "${d2}" ]; do
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d2="${d2#0}"; d1="${d1}0"
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done
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[ "$3" ] && {
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[ "$w1" -ne "$w2" -a "$d1" -ne "$d2" ] && {
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exit 0
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} || return 1
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} || {
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[ "$w1" -eq "$w2" -a "$d1" -eq "$d2" ] && {
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exit 0
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} || return 1
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}
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}
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2022-04-19 03:36:29 +00:00
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n1="$1"; op="$2"; n2="$3"
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case "$op" in
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'^~'|'~^'|'^='|'-cl') ceil "$n1" "$n2" || exit 1 ;;
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'~'|'≈'|'≅'|'-fl') floor "$n1" "$n2" || exit 1 ;;
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2022-04-19 18:22:06 +00:00
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'>'|'-gt') gt "$n1" "$n2" || exit 1 ;;
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'<'|'-lt') lt "$n1" "$n2" || exit 1 ;;
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'-ge'|'>='|'=>') gt "$n1" "$n2" "-" || exit 1 ;;
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'-le'|'<='|'=<') lt "$n1" "$n2" "-" || exit 1 ;;
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# or equal to is set via $3
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'-eq'|'=='|'=') eq "$n1" "$n2" || exit 1 ;;
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'-ne'|'!=='|'!=') eq "$n1" "$n2" "-" || exit 1
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# -ne uses $3 with -eq
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2022-04-19 03:36:29 +00:00
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esac
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exit 0 # exit 0 if done
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