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@ValeFCF
ValeFCF committed Jul 29, 2013
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6 changes: 6 additions & 0 deletions .classpath
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<?xml version="1.0" encoding="UTF-8"?>
<classpath>
<classpathentry kind="src" path="src"/>
<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/JavaSE-1.7"/>
<classpathentry kind="output" path="bin"/>
</classpath>
17 changes: 17 additions & 0 deletions .project
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<?xml version="1.0" encoding="UTF-8"?>
<projectDescription>
<name>CompiladorLexerParser</name>
<comment></comment>
<projects>
</projects>
<buildSpec>
<buildCommand>
<name>org.eclipse.jdt.core.javabuilder</name>
<arguments>
</arguments>
</buildCommand>
</buildSpec>
<natures>
<nature>org.eclipse.jdt.core.javanature</nature>
</natures>
</projectDescription>
11 changes: 11 additions & 0 deletions .settings/org.eclipse.jdt.core.prefs
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eclipse.preferences.version=1
org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
org.eclipse.jdt.core.compiler.codegen.targetPlatform=1.7
org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
org.eclipse.jdt.core.compiler.compliance=1.7
org.eclipse.jdt.core.compiler.debug.lineNumber=generate
org.eclipse.jdt.core.compiler.debug.localVariable=generate
org.eclipse.jdt.core.compiler.debug.sourceFile=generate
org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
org.eclipse.jdt.core.compiler.source=1.7
Empty file added README.md
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Binary file added bin/Lexer.class
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Binary file added bin/Parser$Tokens.class
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Binary file added bin/Parser.class
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110 changes: 110 additions & 0 deletions src/CompiladorSimple.java
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import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;

/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/

/**
*
* @author Emmanuel Valentín Granados López
*
*/
public class CompiladorSimple
{

/**
* @param args the command line arguments
*/
public static void main(String[] args)
{


String linea="";

File f = new File( "C:\\ab.txt" );
BufferedReader entrada=null;
try {
entrada = new BufferedReader( new FileReader( f ) );

while(entrada.ready()){
linea = entrada.readLine();
System.out.println(linea + " Esta linea se obtuvo desde un txt");
}
}catch (IOException e) {
e.printStackTrace();
}
finally
{
try{
entrada.close();
}catch(IOException e1){}
}


// Prueba del lexer

String palabra1 = "-1/1-2*3+4";
String palabra2 = "324+54+4567/4563-12345678900987654321*1";
String palabra3 = "1/11*11+11-1P";


Lexer lex = new Lexer();

Parser parser = new Parser();

// Prueba lexer para cadena obtenida en txt desde C:\\
if (linea.matches ("[0-9(\\+|\\/|\\-|\\*)*]*")) {
lex.setCadena(linea);
System.out.println("Lexer Para txt: " + linea + " Token devuelto: " + ((lex.edo0() == 0) ? "ACEPTADA" : "INVALIDA"));
System.out.println("Parser: txt");
parser.parse(linea + ";",';');

}
else {
System.out.println("error : se encontraron caracteres distintos a los permitidos");
}

if (palabra1.matches ("[0-9(\\+|\\/|\\-|\\*)*]*")) {
lex.setCadena(palabra1);
System.out.println("Lexer Para 1: " + palabra1 + " Token devuelto: " + ((lex.edo0() == 0) ? "ACEPTADA" : "INVALIDA"));
System.out.println("Parser: palabra1");
parser.parse(palabra1 + ";",';');
}
else {
System.out.println("error : se encontraron caracteres distintos a los permitidos");
}


if (palabra2.matches ("[0-9(\\+|\\/|\\-|\\*)*]*")) {
lex.setCadena(palabra2);
System.out.println("Lexer Para 2: " + palabra2 + " Token devuelto: " + ((lex.edo0() == 0) ? "ACEPTADA" : "INVALIDA"));
System.out.println("Parser: palabra2");
parser.parse(palabra2 + ";",';');
}
else {
System.out.println("error : se encontraron caracteres distintos a los permitidos");
}

if (palabra3.matches ("[0-9(\\+|\\/|\\-|\\*)*]*")) {
lex.setCadena(palabra3);
System.out.println("Lexer Para 3: " + palabra3 + " Token devuelto: " + ((lex.edo0() == 0) ? "ACEPTADA" : "INVALIDA"));
System.out.println("Parser: palabra3");
parser.parse(palabra3 + ";",';');
}
else {
System.out.println("error : se encontraron caracteres distintos a los permitidos");
}


// Prueba del parser


System.out.println("---------Solo");
parser.parse("12+345*678/90;12++3432", ';');

}
}
106 changes: 106 additions & 0 deletions src/Lexer.java
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/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/

/**
*
* @author Emmanuel Valentín Granados López
*
*/
public class Lexer
{
static final int ERROR = -1;
static final int ACEPTAR = 0;

private String cadena = "";
private int cont = 0;


public void setCadena(String cadena)
{
this.cadena = cadena;
cont = 0;
}

char obtenerCaracter()
{
char c = (cont >= cadena.length()) ? 'z' : cadena.charAt(cont);
cont++;
return c;
}

int edo0()
{
char c = obtenerCaracter();
switch(c)
{
case '0': return edo1();
case '1': return edo1();
case '2': return edo1();
case '3': return edo1();
case '4': return edo1();
case '5': return edo1();
case '6': return edo1();
case '7': return edo1();
case '8': return edo1();
case '9': return edo1();
default: return ERROR;
}
}

int edo1()
{

char c = obtenerCaracter();

switch(c)
{

case '0': return edo1();
case '1': return edo1();
case '2': return edo1();
case '3': return edo1();
case '4': return edo1();
case '5': return edo1();
case '6': return edo1();
case '7': return edo1();
case '8': return edo1();
case '9': return edo1();

case '+': return edo2();
case '-': return edo2();
case '*': return edo2();
case '/': return edo2();


}

return ACEPTAR;


}

int edo2()
{
char c = obtenerCaracter();
switch(c)
{
case '0': return edo1();
case '1': return edo1();
case '2': return edo1();
case '3': return edo1();
case '4': return edo1();
case '5': return edo1();
case '6': return edo1();
case '7': return edo1();
case '8': return edo1();
case '9': return edo1();
default: return ERROR;
}
}




}
64 changes: 64 additions & 0 deletions src/Parser.java
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/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/

/**
*
* @author Emmanuel Valentín Granados López
*
*/
public class Parser
{
enum Tokens
{
ACEPTADA,
INVALIDA,
PUNTOYCOMA,
EOF
}

public void parse(String secuencia, char delimitador)
{
Lexer lex = new Lexer();
Tokens token = Tokens.EOF;
String buffer = "";
int pos = 0;

do
{
if (pos < secuencia.length())
{
while(secuencia.charAt(pos) != delimitador)
{
buffer+= secuencia.charAt(pos);
pos++;
if (pos >= secuencia.length()) break;
}

if(!buffer.equals(""))
{
lex.setCadena(buffer);
if(lex.edo0() == 0)
token = Tokens.ACEPTADA;
else
token = Tokens.INVALIDA;
buffer = "";

}
else if(secuencia.charAt(pos) == ';')
{
token = Tokens.PUNTOYCOMA;
pos++;
}
}
else
token = Tokens.EOF;

System.out.println(token.name());

}while(token != Tokens.EOF);
}

}

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