MAFCOG 1.0A Generic code generator for Mathematical Functions

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: I 1 "tOR~ ~.¥Y I' "S 't',:. .•••.•' " " " .. ',ni"' C~1"t''Yi:t.. xU ")"3 . }.fA FCOG 1.0A Generic Code Generator For .~!:;!het1latical Functions Parsing Layer, XML Parsing Layer, Code Expr: = Dumber Generation Layer as described below. 4.1 Formula Parsing Layer expr '+' expr 'expr '-' expr expr ,*, expr expr'Z'expr The formula for which the code is required to be generated is parsed and validated against the defined grammar rules. number:= digit+('.' Digit+)? Digit.=tu'" 1'1'2'1'3';'4'1'5'1'6'1'7'1'8'1'9' [7] For parsing the formula and populate the JavaCC: JavaCC available for free, is a data structures with the formula tokens, the parser generator It provides a Java Grammar files and associated template files will be used and data is populated. The formula parsing includes following analysis: 4.1.1 Lexical Analysis: Language extension for specifying a programming language's grammar. JavaCC allows us to define grammar in a fashion similar tc EBNF, making it easy to translate EBNF grammar into the JavaCC format. [6] Lexical analysis takes a cursory look at the input data and divides .into" proper tokens.; Tokens examples in mathematical expression include. variable, symbols such as IT numbers etc. 4.1.2 Syntactic analysis (Parsing): During Syntactic analysis, a parser extracts meaning from the program source code by ensuring the syntactical correctness of input data. During syntactic analysis a compiler examines the input with respect to the rules defined in the language's grammar. If any rule is violated, the compiler. displays an error message. A grammar rule should be specified unambiguously and in entirety with the EBNF (Extended Backus-Naur- Form). Following grammar rules for small language that describes basic. arithmetic expression: 4.2. XlVILParsing Layer Tasks fer parsing specifications and generating code are executed In a straightforward process presented in figure 1.3 :-elow. The source code generator that uses :::e rules to select the appropriate data populated from templates and assembles :~em into source code and writes out the soi.-ce code The XML parsing layer is broken out into following c ompcnents "," ,=' ." fit ",'
. r r - ;;- " .r- r r r: , ;. !'r ~r • r j' I I I ! ~ I"'" , I"'" r: r: r ---- Formula D..r.nlUon XMI..Pars.ng I..ayer . XMt.. Templates , Parsing .S: Ruks . r - j~ ~. ••• 4.2.1 Formula PI1T.\'I!TEngine Out Put: The Data Structures containing the details of the formula are extracted and provided as input to the X~tL reader and parser. The XML reader and parser will read templates accordingly for generating the code. The Out put from Formula Parser engine includes the detnil s such as "Target Language", Tokcns, Operands used, Mathematical operators (Power, Square, Square Root etc.) 4.2.2 TII(~XML Parser: This' part generates two things: • A programm i:1g language .capable of complex logic; ··1encra~~. c- .. - '... . . ':r,,!!\ m;.:1~~;I' . Proceedings of the National Conference on Computing and Applications (NACCA '06) National Engineering College. Kovtlpatti, Tamil Nadu .~rc.... I . .. , E'~~'~"':-i' ; -u: ....,., C4de Genera ••on Layer Temporary templates will be dynamically created to store the code blocks for further use as explained above. ',4.2.4 The logic module that generates rules: . After reading the XML templates in the XML documents and navigating through it, MAFCOG LO generator will pick up information in different parts of the templates to select and assemble the templates into proper code thus generating the pseudo-code after reading the Document Reader And .. APPLICATION nude's target-language • An XML utiliry for the language .. For MAFCOG 1,0 the language to be used as "Java" and X~IL utility as "JDOM"_ The XML document reader-and parser will read out the Out put from Formula Parser engine. and parse the Xl\IL templates accordingly 4.2.3 The template lihrary: The XML Templates. which will be read, are as • Mathkules • JavaDOC • Control Structures. CeneriJre : - :. attribute .The code blocks generated will be . stored .in temporary templates in template that is library for further use. TtmpIL~!..~ XMLParSing L!'rer Fig 1.3 XML Parsing Layer 4.3. Code Generation Layer Code Generation Layer Source Code Generator will read the XML rules, selecting the appropriate data structures populated from XML templates, inserting the proper variables into the 365 ~I \
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MAFCOG 1.0A Generic code generator for Mathematical Functions

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