m4: Sync with FreeBSD.
[dragonfly.git] / usr.bin / m4 / expr.c
CommitLineData
4afad3d8 1/* $OpenBSD: expr.c,v 1.18 2010/09/07 19:58:09 marco Exp $ */
984263bc 2/*
4afad3d8 3 * Copyright (c) 2004 Marc Espie <espie@cvs.openbsd.org>
984263bc 4 *
4afad3d8
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5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
984263bc 8 *
4afad3d8
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9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1de703da 16 *
4afad3d8 17 * $FreeBSD: src/usr.bin/m4/expr.c,v 1.19 2012/11/17 01:54:24 svnexp Exp $
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18 */
19
4afad3d8 20#include <stdint.h>
984263bc 21#include <stdio.h>
4afad3d8 22#include <stddef.h>
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23#include "mdef.h"
24#include "extern.h"
25
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26int32_t end_result;
27static const char *copy_toeval;
28int yyerror(const char *msg);
984263bc 29
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30extern void yy_scan_string(const char *);
31extern int yyparse(void);
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32
33int
4afad3d8 34yyerror(const char *msg)
984263bc 35{
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36 fprintf(stderr, "m4: %s in expr %s\n", msg, copy_toeval);
37 return(0);
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38}
39
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40int
41expr(const char *toeval)
984263bc 42{
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43 copy_toeval = toeval;
44 yy_scan_string(toeval);
45 yyparse();
46 return end_result;
984263bc 47}