diff options
Diffstat (limited to 'core/includes/versioncompare.inc')
| -rw-r--r-- | core/includes/versioncompare.inc | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/core/includes/versioncompare.inc b/core/includes/versioncompare.inc new file mode 100644 index 00000000..f49a404f --- /dev/null +++ b/core/includes/versioncompare.inc @@ -0,0 +1,61 @@ + +# From http://stackoverflow.com/a/4025065/2043481 +# Returns 0 when equal, 1 when $1 > $2, 2 otherwise +version_compare () { + if [[ "$1" == "$2" ]]; then + return 0 + fi + local IFS=".-_" + local i ver1=($1) ver2=($2) + # fill empty fields in ver1 with zeros + for ((i=${#ver1[@]}; i<${#ver2[@]}; i++)); do + ver1[i]=0 + done + for ((i=0; i<${#ver1[@]}; i++)); do + if [[ -z "${ver2[i]}" ]]; then + # fill empty fields in ver2 with zeros + ver2[i]=0 + fi + if ((10#${ver1[i]} > 10#${ver2[i]})); then + return 1 + fi + if ((10#${ver1[i]} < 10#${ver2[i]})); then + return 2 + fi + done + return 0 +} + +version_ge () { + version_compare "$1" "$2" + local RET=$? + [ "$RET" == "2" ] && return 1 + return 0 +} + +version_le () { + version_compare "$1" "$2" + local RET=$? + [ "$RET" == "1" ] && return 1 + return 0 +} + +version_gt () { + version_compare "$1" "$2" + local RET=$? + [ "$RET" == "1" ] && return 0 + return 1 +} + +version_lt () { + version_compare "$1" "$2" + local RET=$? + [ "$RET" == "2" ] && return 0 + return 1 +} + +version_eq () { + version_compare "$1" "$2" + return $? +} + |