UAM@SOCO 2014: Detection of Source Code Re-use by means of Combining Different Types of Representations

This paper describes the participation of the Language and Reasoning group from UAM-C in the context of the SOurce COde re-use competition (SOCO 2014). We propose different representations of a source code, which attempt to highlight different aspects of a code; particularly: i) lexical, ii) structural, and iii) stylistics. From the lexical view, we used a character 3-gram model without considering all reserved words for the programming language in revision. For the structural view, we proposed two similarity metrics that takes into account the function’s signatures within a source code, namely the data types and the identifier’s names of the function’s signature. The third view consists on accounting for several stylistics’ features, such as the number of white spaces, lines of code, upper letters, etc. At the end, we combine these different representations in three ways, each of which was a run submission for the SOCO competition this year. Obtained results indicate that proposed representations provide some information that allows to detect particular cases of source code re-use.