1 /* $NetBSD: expr.c,v 1.19 2009/10/26 21:11:28 christos Exp $ */
2 /* $OpenBSD: expr.c,v 1.17 2006/01/20 23:10:19 espie Exp $ */
3 /*
4 * Copyright (c) 2004 Marc Espie <espie@cvs.openbsd.org>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18 #if HAVE_NBTOOL_CONFIG_H
19 #include "nbtool_config.h"
20 #endif
21 #include <sys/cdefs.h>
22 __RCSID("$NetBSD: expr.c,v 1.19 2009/10/26 21:11:28 christos Exp $");
23 #include <stdint.h>
24 #include <stdio.h>
25 #include <stddef.h>
26 #include "mdef.h"
27 #include "extern.h"
28
29 int32_t end_result;
30 const char *copy_toeval;
31
32 extern void yy_scan_string(const char *);
33 extern int yyparse(void);
34 extern int yyerror(const char *);
35
36 int
yyerror(const char * msg)37 yyerror(const char *msg)
38 {
39 fprintf(stderr, "m4: %s in expr %s\n", msg, copy_toeval);
40 return(0);
41 }
42
43 int
expr(const char * toeval)44 expr(const char *toeval)
45 {
46 copy_toeval = toeval;
47 yy_scan_string(toeval);
48 yyparse();
49 return end_result;
50 }
51