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#!/bin/bash
# Copyright 1999-2018 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
__eapi7_ver_parse_range() {
local range=${1}
local max=${2}
[[ ${range} == [0-9]* ]] \
|| die "${FUNCNAME}: range must start with a number"
start=${range%-*}
[[ ${range} == *-* ]] && end=${range#*-} || end=${start}
if [[ ${end} ]]; then
[[ ${start} -le ${end} ]] \
|| die "${FUNCNAME}: end of range must be >= start"
[[ ${end} -le ${max} ]] || end=${max}
else
end=${max}
fi
}
__eapi7_ver_split() {
local v=${1} LC_ALL=C
comp=()
# get separators and components
local s c
while [[ ${v} ]]; do
# cut the separator
s=${v%%[a-zA-Z0-9]*}
v=${v:${#s}}
# cut the next component; it can be either digits or letters
[[ ${v} == [0-9]* ]] && c=${v%%[^0-9]*} || c=${v%%[^a-zA-Z]*}
v=${v:${#c}}
comp+=( "${s}" "${c}" )
done
}
ver_cut() {
local range=${1}
local v=${2:-${PV}}
local start end
local -a comp
__eapi7_ver_split "${v}"
local max=$((${#comp[@]}/2))
__eapi7_ver_parse_range "${range}" "${max}"
local IFS=
if [[ ${start} -gt 0 ]]; then
start=$(( start*2 - 1 ))
fi
echo "${comp[*]:start:end*2-start}"
}
ver_rs() {
local v
(( ${#} & 1 )) && v=${@: -1} || v=${PV}
local start end i
local -a comp
__eapi7_ver_split "${v}"
local max=$((${#comp[@]}/2 - 1))
while [[ ${#} -ge 2 ]]; do
__eapi7_ver_parse_range "${1}" "${max}"
for (( i = start*2; i <= end*2; i+=2 )); do
[[ ${i} -eq 0 && -z ${comp[i]} ]] && continue
comp[i]=${2}
done
shift 2
done
local IFS=
echo "${comp[*]}"
}
__eapi7_ver_compare_int() {
local a=$1 b=$2 d=$(( ${#1}-${#2} ))
# Zero-pad to equal length if necessary.
if [[ ${d} -gt 0 ]]; then
printf -v b "%0${d}d%s" 0 "${b}"
elif [[ ${d} -lt 0 ]]; then
printf -v a "%0$(( -d ))d%s" 0 "${a}"
fi
[[ ${a} > ${b} ]] && return 3
[[ ${a} == "${b}" ]]
}
__eapi7_ver_compare() {
local va=${1} vb=${2} a an al as ar b bn bl bs br re LC_ALL=C
re="^([0-9]+(\.[0-9]+)*)([a-z]?)((_(alpha|beta|pre|rc|p)[0-9]*)*)(-r[0-9]+)?$"
[[ ${va} =~ ${re} ]] || die "${FUNCNAME}: invalid version: ${va}"
an=${BASH_REMATCH[1]}
al=${BASH_REMATCH[3]}
as=${BASH_REMATCH[4]}
ar=${BASH_REMATCH[7]}
[[ ${vb} =~ ${re} ]] || die "${FUNCNAME}: invalid version: ${vb}"
bn=${BASH_REMATCH[1]}
bl=${BASH_REMATCH[3]}
bs=${BASH_REMATCH[4]}
br=${BASH_REMATCH[7]}
# Compare numeric components (PMS algorithm 3.2)
# First component
__eapi7_ver_compare_int "${an%%.*}" "${bn%%.*}" || return
while [[ ${an} == *.* && ${bn} == *.* ]]; do
# Other components (PMS algorithm 3.3)
an=${an#*.}
bn=${bn#*.}
a=${an%%.*}
b=${bn%%.*}
if [[ ${a} == 0* || ${b} == 0* ]]; then
# Remove any trailing zeros
[[ ${a} =~ 0+$ ]] && a=${a%"${BASH_REMATCH[0]}"}
[[ ${b} =~ 0+$ ]] && b=${b%"${BASH_REMATCH[0]}"}
[[ ${a} > ${b} ]] && return 3
[[ ${a} < ${b} ]] && return 1
else
__eapi7_ver_compare_int "${a}" "${b}" || return
fi
done
[[ ${an} == *.* ]] && return 3
[[ ${bn} == *.* ]] && return 1
# Compare letter components (PMS algorithm 3.4)
[[ ${al} > ${bl} ]] && return 3
[[ ${al} < ${bl} ]] && return 1
# Compare suffixes (PMS algorithm 3.5)
as=${as#_}${as:+_}
bs=${bs#_}${bs:+_}
while [[ -n ${as} && -n ${bs} ]]; do
# Compare each suffix (PMS algorithm 3.6)
a=${as%%_*}
b=${bs%%_*}
if [[ ${a%%[0-9]*} == "${b%%[0-9]*}" ]]; then
__eapi7_ver_compare_int "${a##*[a-z]}" "${b##*[a-z]}" || return
else
# Check for p first
[[ ${a%%[0-9]*} == p ]] && return 3
[[ ${b%%[0-9]*} == p ]] && return 1
# Hack: Use that alpha < beta < pre < rc alphabetically
[[ ${a} > ${b} ]] && return 3 || return 1
fi
as=${as#*_}
bs=${bs#*_}
done
if [[ -n ${as} ]]; then
[[ ${as} == p[_0-9]* ]] && return 3 || return 1
elif [[ -n ${bs} ]]; then
[[ ${bs} == p[_0-9]* ]] && return 1 || return 3
fi
# Compare revision components (PMS algorithm 3.7)
__eapi7_ver_compare_int "${ar#-r}" "${br#-r}" || return
return 2
}
ver_test() {
local va op vb
if [[ $# -eq 3 ]]; then
va=${1}
shift
else
va=${PVR}
fi
[[ $# -eq 2 ]] || die "${FUNCNAME}: bad number of arguments"
op=${1}
vb=${2}
case ${op} in
-eq|-ne|-lt|-le|-gt|-ge) ;;
*) die "${FUNCNAME}: invalid operator: ${op}" ;;
esac
__eapi7_ver_compare "${va}" "${vb}"
test $? "${op}" 2
}
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