eda-tools/b2/lang.l

%{
/*
 * lang.l - BOOM syntax
 *
 *  Copyright 2012 by Werner Almesberger
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */

#include <stdarg.h>
#include <stdlib.h>

#include "util.h"
#include "param.h"
#include "y.tab.h"


static int lineno = 1;

%}

%%

[-_A-Za-z0-9()+./]+		{ yylval.s = unique(yytext);
				  return WORD; }

"<="				return TOK_LE;
">="				return TOK_GE;

[ \t]				;
\n				lineno++;
^#[^n]*\n			lineno++;

.				return *yytext;

%%


void yyerrorf(const char *fmt, ...)
{
	va_list ap;

	va_start(ap, fmt);
	fprintf(stderr, "%d: ", lineno);
	vfprintf(stderr, fmt, ap) ;
	fprintf(stderr, "\n");
	va_end(ap);
	exit(1);
}


void yyerror(const char *s)
{
	fprintf(stderr, "%d: %s\n", lineno, s);
	exit(1);
}