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/* Copyright (C) 2004-2005 Tresys Technology, LLC
* see file 'COPYING' for use and warranty information */
/*
* Author: Jason Tang (jtang@tresys.com)
*/
%{
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include "flowassert.h"
#include "flowassert_parse.h"
extern int fileno (FILE *);
int flowerror(char *msg);
void flowwarn(char *format, ...);
static void flowstrdup (void);
unsigned long flowassert_lineno = 1;
#define YY_NO_UNPUT
%}
%array
%option noyywrap
identifier [A-Za-z][A-Za-z0-9_.]*
number [0-9]+
%%
#[^\n]* { /* delete comments */ }
(noflow)|(NOFLOW) { return (NOFLOW); }
(mustflow)|(MUSTFLOW) { return (MUSTFLOW); }
(onlyflow)|(ONLYFLOW) { return (ONLYFLOW); }
{identifier} { flowstrdup (); return (IDENTIFIER); }
\${identifier} { flowstrdup (); return (VARNAME); }
{number} { flowlval.i = atoi (flowtext); return (NUMBER); }
[ \t\f]+ { /* delete whitespace */ }
\n { /* delete whitespace */ flowassert_lineno++; }
[:;\{\}*=-] { return (flowtext [0]); }
. { (void) flowwarn ("unrecognized character");}
%%
/* yyerror() specifically for the flowassert tool. */
int flowerror (char *msg) {
/* flowwarn ("%s on token `%s'", msg, flowtext); */
flowassert_add_error_result (FLOW_ASSERT_SYNTAX_ERROR);
return -1;
}
/* Displays a warning to standard error regarding a problem with the
assertion file. Also displays the line on which the warning
occurred. */
void flowwarn (char *format, ...) {
/*
va_list ap;
(void) fprintf (stderr, "line %ld: ", flowassert_lineno);
va_start (ap, format);
(void) vfprintf (stderr, format, ap);
va_end (ap);
(void) fprintf (stderr, "\n");
*/
flowassert_add_error_result (FLOW_ASSERT_SYNTAX_ERROR);
}
/* strdup()s flowtext (really yytext) to flowlval.s (really
yylval.s). */
static void flowstrdup (void) {
if ((flowlval.s = strdup (flowtext)) == NULL) {
(void) fprintf (stderr, "out of memory in flowstrdup\n");
exit (-1);
}
}
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