Windows | Games | Mobile | Wallpapers


Xdelta 3.0u

The new merge command allows you to combine a sequence of deltas


Last Week downloads: 0
Total downloads: 4,050
Other Image Tools
  • Last Updated: Feb 25, 2009
  • License: Freeware Free
  • OS: Windows XP/2000/98/Me/NT
  • Requirements: No special requirements

User reviews

3 out of 5 based on 2 ratings for Xdelta 3.0u

For Xdelta 3.0uPublisher's description


Xdelta is a Photo & Image software developed by Josh MacDonald. After our trial and test, the software is proved to be official, secure and free. Here is the official description for Xdelta:

EditByBrothersoft: An application for computing file deltas and later applying those deltas to reconstruct (patch) files. The DELTA Algorithm works well on all types of files, not just text files. It is useful for distributing updates and patches to files which have only slightly
The new merge command allows you to Combine a sequence of deltas, to produce a single output that represents the net effect of the sequence. The command is reasonably efficient because it computes the result directly, without constructing any intermediate copies (and without access to the first-of-chain source). I say "reasonably" because there's a soft spot in this algorithm.

A VCDIFF encoding contains two kinds of Copy instructions: (1) copies from the source file, which the merge command can translate with straight-forward arithmetic, and (2) copies from the target file (itself), which are more difficult. Because a target copy can copy from another target copy earlier in the window, merging from a target copy at the end of a window may involve following a long chain of target copies all the way to the beginning of the window. The merge command implements this today using recursion, which is not an efficient solution. A better solution involves computing a couple of auxiliary data structures so that: (1) finding the origin of a target copy is a constant-time operation, (2) finding where (if at all) the origin of a target copy is copied by a subsequent delta in the chain. The second of these structures requires, essentially, a function to compute the inverse mapping of a delta, which is a feature that has its own applications.
Release Notes:

* New xdelta3 merge command (issue 36)
* Windows stdin/stdout-related fixes (issue 34)
* Fix API-only infinite loop (issue 70)
* Various portability and build fixes (gcc4, DJGPP, MinGW, Big-endian, Solaris, C++)
* New regression test (yeah!)
you can free download Xdelta 3.0u now.


Please be aware that Brothersoft do not supply any crack, patches, serial numbers or keygen for Xdelta,and please consult directly with program authors for any problem with Xdelta.