Method and system for generating a reverse binary patch

G - Physics – 06 – F

Patent

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G06F 9/44 (2006.01) G06F 9/445 (2006.01)

Patent

CA 2653714

A reverse patch for undoing a forward patch for obtaining a new binary image from an old binary image is generated in two parts. First a reverse index file is generated when the forward patch is created at a host or server. The reverse index file identifies regions of similarity between the old binary image and the new binary image. The reverse index file is transmitted with the forward patch to an electronic device. Second, while applying the forward patch to obtain the new binary image from the old binary image, the electronic device generates the reverse patch based upon the new binary image, the old binary image, and the reverse index file. The forward patch and reverse patch may both be incremental patches. Incremental patches are generated and applied on a sector-by-sector basis.

L'invention concerne un correctif inverse destiné à annuler un correctif direct pour obtenir une nouvelle image binaire à partir d'une ancienne image binaire, qui est généré en deux parties. En premier lieu, un fichier index inverse est généré lors de la création du correctif direct sur un hôte ou un serveur. Le fichier index inverse identifie les zones de similarité entre l'ancienne image binaire et la nouvelle image binaire. Le fichier index inverse est transmis avec le correctif direct à un dispositif électronique. En second lieu, lors de l'application du correctif direct pour obtenir la nouvelle image binaire à partir de l'ancienne image binaire, le dispositif électronique génère le correctif inverse en se basant sur la nouvelle image binaire, l'ancienne image binaire, et le fichier index inverse. Le correctif direct et le correctif inverse peuvent tous deux être des correctifs incrémentiels. Les correctifs incrémentiels sont générés et appliqués secteur par secteur.

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