cmpver

Documentation

Overview

Package cmpver implements a variant of debian version number comparison.

A version is a string consisting of alternating non-numeric and numeric fields. When comparing two versions, each one is broken down into its respective fields, and the fields are compared pairwise. The comparison is lexicographic for non-numeric fields, numeric for numeric fields. The first non-equal field pair determines the ordering of the two versions.

This comparison scheme is a simplified version of Debian's version number comparisons. Debian differs in a few details of lexicographical field comparison, where certain characters have special meaning and ordering. We don't need that, because Tailscale version numbers don't need it.

Index

• func Compare(v1, v2 string) int

Functions

func Compare

func Compare(v1, v2 string) int

Compare returns an integer comparing two strings as version numbers. The result will be 0 if v1==v2, -1 if v1 < v2, and +1 if v1 > v2.