/// <summary>
/// Compare this version with parameter
/// </summary>
/// <param name="semver">Semver to compare with</param>
/// <returns>-1 if less than, 0 if equals, 1 if greater</returns>
public int CompareTo(SemVer semver)
{
if (this.Major < semver.Major)
{
return -1;
}
if (this.Major > semver.Major)
{
return 1;
}
if (this.Minor < semver.Minor)
{
return -1;
}
if (this.Minor > semver.Minor)
{
return 1;
}
if (this.Patch < semver.Patch)
{
return -1;
}
if (this.Patch > semver.Patch)
{
return 1;
}
if (this.PreRelease != null && semver.PreRelease == null)
{
return -1;
}
if (this.PreRelease == null && semver.PreRelease != null)
{
return 1;
}
if (this.Build != null && semver.Build == null)
{
return 1;
}
if (this.Build == null && semver.Build != null)
{
return -1;
}
// TODO - handle precedence if both have prerelease or build
return 0;
}
/// <summary>
/// Parse a semver campatable version string and create SemVer
/// </summary>
/// <param name="version">version string</param>
/// <param name="semver">created class</param>
/// <returns>0 if success, negative if parse error</returns>
private static int ParseHelper(string version, out SemVer semver)
{
int major = 0;
int minor = 0;
int patch = 0;
semver = null;
if (version == null)
{
return -1;
}
char[] seps1 = new char[1] { '.' };
string[] parts = version.Split(seps1, 3);
if (!int.TryParse(parts[0], out major))
{
return -3;
}
if (parts.Length > 1)
{
if (!int.TryParse(parts[1], out minor))
{
return -4;
}
}
if (parts.Length > 2)
{
char[] seps2 = new char[2] { '+', '-' };
string[] patchparts = parts[2].Split(seps2, 2);
if (!int.TryParse(patchparts[0], out patch))
{
return -5;
}
if (patchparts.Length == 2)
{
bool isBuild = false;
string ext = null;
if (parts[2].IndexOf('+') != -1)
{
isBuild = true;
ext = patchparts[1];
}
else
{
isBuild = false;
ext = patchparts[1];
}
semver = new SemVer(major, minor, patch, isBuild, ext);
}
else
{
semver = new SemVer(major, minor, patch);
}
}
else
{
semver = new SemVer(major, minor, patch);
}
return 0;
}
/// <summary>
/// Try to parse a semver campatable version string and create SemVer
/// </summary>
/// <param name="version">version string</param>
/// <param name="semver">created class</param>
/// <returns>true if success, false if fails</returns>
public static bool TryParse(string version, out SemVer semver)
{
int rc = ParseHelper(version, out semver);
if (rc == 0)
{
return true;
}
else
{
return false;
}
}