/* $OpenBSD: expr.c,v 1.18 2010/09/07 19:58:09 marco Exp $ */
/*
 * Copyright (c) 2004 Marc Espie <espie@cvs.openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */
#include "third_party/m4/mdef.h"
/**/
#include "third_party/m4/extern.h"

int32_t end_result;
const char *copy_toeval;

extern void yy_scan_string(const char *);
extern int yyparse(void);

int yyerror(const char *msg) {
  fprintf(stderr, "m4: %s in expr %s\n", msg, copy_toeval);
  return (0);
}

int expr(const char *toeval) {
  copy_toeval = toeval;
  yy_scan_string(toeval);
  yyparse();
  return end_result;
}