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Lexico.l
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Lexico.l
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%{
#include <stdio.h>
#include <stdlib.h>
#include <conio.h>
#include <string.h>
#include <math.h>
#include "y.tab.h"
FILE *yyin;
#define LIM_STR 30
#define LIM_ID 30
int validarLongitud(int);
void mostrarError(char *);
char auxS[100];
%}
%option noyywrap
%option yylineno
DIGITO [0-9]
LETRA [a-zA-Z]
ID {LETRA}({LETRA}|{DIGITO}|_)*
COMENTARIO_INICIO "***/"
COMENTARIO_FIN "/***"
COMENTARIOS {COMENTARIO_INICIO}[^"\n]+{COMENTARIO_FIN}
CADENA \"[^"\n]+\"
REAL ({DIGITO}*"."{DIGITO}+)|("."{DIGITO}+)|({DIGITO}+"."{DIGITO}*)
ENTERO {DIGITO}+
%%
":=" {return ASIG;}
"+=" {return ASIG_MAS;}
"-=" {return ASIG_MEN;}
"*=" {return ASIG_MULT;}
"/=" {return ASIG_DIV;}
"==" {return OP_IGUAL;}
"!=" {return OP_DISTINTO;}
"+" {return OP_SUMA;}
"-" {return OP_RESTA;}
"*" {return OP_MUL;}
"/" {return OP_DIV;}
"(" {return P_A;}
")" {return P_C;}
";" {return P_Y_C;}
":" {return DOSPUNTOS;}
"," {return COMA;}
"{" {return LL_A;}
"}" {return LL_C;}
"[" {return C_A;}
"]" {return C_C;}
">" {return OP_MAY; }
">=" {return OP_MAY_IG; }
"<" {return OP_MEN; }
"<=" {return OP_MEN_IG; }
"IF" {return IF;}
"THEN" {return THEN;}
"ELSE" {return ELSE;}
"ENDIF" {return ENDIF;}
"WHILE" {return WHILE;}
"ENDWHILE" {return ENDWHILE;}
"AND" {return AND;}
"OR" {return OR;}
"NOT" {return NOT;}
"DEFVAR" {return DEFVAR;}
"ENDDEF" {return ENDDEF;}
"FLOAT" {return FLOAT;}
"STRING" {return STRING;}
"INT" {return INTEGER;}
"DISPLAY" {return DISPLAY;}
"GET" {return GET;}
"COMB" {return COMB;}
"FACT" {return FACT;}
"CONST" {return CONST;}
{ID} { sprintf(auxS,"%s", yytext);
if(validarLongitud(ID) == 0)
mostrarError(yytext);
yylval.str_val=auxS;
return ID;
}
{ENTERO} { if(validarLongitud(ENTERO) == 0)
mostrarError(yytext);
sscanf(yytext,"%d",&(yylval.int_val));
return ENTERO;
}
{CADENA} { if(validarLongitud(CADENA) == 0)
mostrarError(yytext);
sprintf(auxS,"%s", yytext);
yylval.str_val=auxS;
return CADENA;
}
{REAL} { if(validarLongitud(REAL) == 0)
mostrarError(yytext);
sscanf(yytext,"%lf",&(yylval.float_val));
return REAL;
}
{COMENTARIOS}
"\n"
"\t"
%%
void mostrarError(char *mensaje) {
printf("ERROR!!!: %s\n", mensaje);
system ("Pause");
exit(2);
}
int validarLongitud(int tipo) {
int entero;
int real;
switch(tipo) {
case ENTERO:
sscanf(yytext,"%d",&entero);
if(entero >= 0 && entero <= 65535)
return 1;
return 0;
break;
case CADENA:
if(strlen(yytext) <= LIM_STR)
return 1;
return 0;
break;
case REAL:
sscanf(yytext,"%lf",&real);
double num = atof(yytext);
double cotaMayor = (3.4)*(exp(38));
if(num >= 0 && num <= cotaMayor)
return 1;
return 0;
break;
case ID:
if(strlen(yytext) <= LIM_ID)
return 1;
return 0;
break;
}
return 0;
}