#!/usr/bin/env sh

#
# slepcversion <gt,lt,le,ge,eq> major.minor[.subminor]"
#   returns 1 on match else 0
#
# For example: slepcversion gt 3.22.1"

if [ "X${SLEPC_DIR}" = "X" ] ; then
    dir=$(dirname $0)
    dir=$(dirname $dir)
    dir=$(dirname $dir)
    SLEPC_DIR=$(dirname $dir)
fi

file=${SLEPC_DIR}/include/slepcversion.h

if [ ! -f $file ]; then
    echo "Unable to find slepcversion.h; ensure the environmental variable SLEPC_DIR is set correctly"
    exit 1
fi

major=`grep "#define SLEPC_VERSION_MAJOR" $file | tr -s ' ' | cut -d" " -f 3`
minor=`grep "#define SLEPC_VERSION_MINOR" $file | tr -s ' ' | cut -d" " -f 3`
subminor=`grep "#define SLEPC_VERSION_SUBMINOR" $file | tr -s ' ' | cut -d" " -f 3`
release=`grep "#define SLEPC_VERSION_RELEASE" $file | tr -s ' ' | cut -d" " -f 3`

if [ $# -lt 1 ]; then
    echo ${major}.${minor}.${subminor}
    exit 0
fi

t=$1
v=$2

vmajor=`echo $v |  cut -d"." -f 1`
vminor=`echo $v |  cut -d"." -f 2`
vsubminor=`echo $v |  cut -d"." -f 3`

if [ $# -lt 2 ]; then
    echo "Usage: slepcversion <gt,lt,le,ge,eq> version"
    echo "For example: slepcversion gt 3.22.1"
    exit 1
fi

eq () {
#    if [  $release = 0 ]; then echo 0; exit 0; fi
    if [  $major != $vmajor ]; then echo 0; exit 0; fi
    if [  $minor != $vminor ]; then echo 0; exit 0; fi
    if [ "${vsubminor}X" = "X" ]; then echo 1; exit 0; fi
    if [ $subminor != $vsubminor ]; then echo 0; exit 0; fi
    echo 1
}

lt () {
#    if [  $release = 0 ]; then echo 0; exit 0; fi
    if [ $major -lt $vmajor ]; then echo 1; exit 0; fi
    if [ $major -gt $vmajor ]; then echo 0; exit 0; fi
    if [ $minor -lt $vminor ]; then echo 1; exit 0; fi
    if [ $minor -gt $vminor ]; then echo 0; exit 0; fi
    if [ "${vsubminor}X" = "X" ]; then echo 0; exit 0; fi
    if [ $subminor -lt $vsubminor ]; then echo 1; exit 0; fi
    echo 0
}

le () {
#    if [  $release = 0 ]; then echo 0; exit 0; fi
    if [ $major -lt $vmajor ]; then echo 1; exit 0; fi
    if [ $major -gt $vmajor ]; then echo 0; exit 0; fi
    if [ $minor -lt $vminor ]; then echo 1; exit 0; fi
    if [ $minor -gt $vminor ]; then echo 0; exit 0; fi
    if [ "${vsubminor}X" = "X" ]; then echo 0; exit 0; fi
    if [ $subminor -le $vsubminor ]; then echo 1; exit 0; fi
    echo 0
}

gt () {
    if [ $major -gt $vmajor ]; then echo 1; exit 0; fi
    if [ $major -lt $vmajor ]; then echo 0; exit 0; fi
    if [ $minor -gt $vminor ]; then echo 1; exit 0; fi
    if [ $minor -lt $vminor ]; then echo 0; exit 0; fi
    if [ "${vsubminor}X" = "X" ]; then echo 1; exit 0; fi
    if [ $subminor -gt $vsubminor ]; then echo 1; exit 0; fi
    echo 0
}

ge () {
    if [ $major -gt $vmajor ]; then echo 1; exit 0; fi
    if [ $major -lt $vmajor ]; then echo 0; exit 0; fi
    if [ $minor -gt $vminor ]; then echo 1; exit 0; fi
    if [ $minor -lt $vminor ]; then echo 0; exit 0; fi
    if [ "${vsubminor}X" = "X" ]; then echo 1; exit 0; fi
    if [ $subminor -ge $vsubminor ]; then echo 1; exit 0; fi
    echo 0
}

${t}

