Data compaction method for an intermediate object code...

Details Data compaction method for an intermediate object code... Data compaction method for an intermediate object code...

G - Physics

06

F

G06F 9/45 (2006.01)

Patent

CA 2317950

The invention concerns a data compaction method and system for an intermediate programme. The method consists in: searching the programme (1000) for identical sequences (Si) and counting Ni number of occurrences of each sequence (Si); a comparison test (1001) to find the superiority of a function f(Ni) to a reference value enables to generate (1003) a specific instruction of a specific code (Ci) with which the sequence (Si) is associated; replacing (1004) each occurrence in the sequence (Si) by the specific code (Ci) in the intermediate programme to create a compacted intermediate programme (FCC) with which an executing file (FEX) is associated. The invention is applicable to multiple application portable objects such as microprocessor cards, onboard systems or the like.

L'invention concerne un procédé et un système de compactage d'un programme intermédiaire. Le programme est soumis à une recheche (1000) de séquences identiques (S i) et à un comptage du nombre N i d'occurrences de chaque séquence (S i). Un test (1001) de comparaison de supériorité d'une fonction f(N i) à une valeur de référence permet de créer (1003) une instruction spécifique de code spécifique (C i) auquel est associée la séquence (S i). Un remplacement de chaque occurrence de la séquence (S i) par le code spécifique (C i) est effectué (1004) dans le programme intermédiaire pour engendrer un programme intermédiaire compacté (FCC) auquel est associé un fichier d'exécution (FEX). Application à des objets portatifs multi-applications tels que carte à microprocesseur, systèmes embarqués ou analogue.

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