Version strings are dot-separated sequences of version-parts.
A version-part consists of up to four parts, all of which are optional:
A version-part may also consist of a single asterisk "*" which indicates "infinity".
Numbers are base-10, and are zero if left out. Strings are compared bytewise.
For additional backwards compatibility, if "string-b" is "+" then "number-a" is incremented by 1 and "string-b" becomes "pre".
1.0pre1 < 1.0pre2 < 1.0 == 1.0.0 == 220.127.116.11 < 1.1pre == 1.1pre0 == 1.0+ < 1.1pre1a < 1.1pre1 < 1.1pre10a < 1.1pre10
Although not required by this interface, it is recommended that numbers remain within the limits of a signed char, i.e. -127 to 128.
This interface is implemented by the following components:
PRInt32 compare ( ACString A , ACString B )
Compare two version strings
- A: The first version
- B: The second version
Reference documentation is generated from Mozilla's source.