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DIGIT [0-9]
LETTER [a-zA-Z_: ]
HEXDIGIT [0-9A-Fa-f]
%option noyywrap
%option nounput
%option noinput
%{
#include <stdio.h>
#include "grammar.h"
#include "parser.h"
int yylex(void);
int yyerror(char *s);
int lines = 1;
%}
%%
"#".*"\n" { /* ignore comments */ }
"be" { return TOK_BIGENDIAN; }
"le" { return TOK_LITTLEENDIAN; }
"next" { return TOK_NEXT; }
"hex" { return TOK_OUTPUT_HEX;}
"integer" { return TOK_OUTPUT_INT;}
"ipv4" { return TOK_OUTPUT_IPV4;}
"mac" { return TOK_OUTPUT_MAC;}
"hidden" { return TOK_OUTPUT_NONE;}
"flag" { return TOK_OUTPUT_FLAG; }
{DIGIT}+ { yylval.intval = atoi(yytext);
return TOK_CONSTANT; }
\"[^\"]*\" { int i;
for(i=0;yytext[i] != '\0'; i++)
if(yytext[i] == '"')
yytext[i] = '\0';
yylval.textval = &yytext[1];
return TOK_IDENTIFIER;
}
"\n" { lines++; }
. { /* ignore everything else */ }
%%
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