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/* $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 <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <stdint.h>
#include <stdio.h>
#include <stddef.h>
#include "mdef.h"
#include "extern.h"
int32_t end_result;
static const char *copy_toeval;
int yyerror(const char *msg);
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;
}
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