minix/usr.bin/m4/expr.c

51 lines
1.5 KiB
C
Raw Normal View History

/* $NetBSD: expr.c,v 1.19 2009/10/26 21:11:28 christos Exp $ */
/* $OpenBSD: expr.c,v 1.17 2006/01/20 23:10:19 espie 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.
*/
#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif
#include <sys/cdefs.h>
__RCSID("$NetBSD: expr.c,v 1.19 2009/10/26 21:11:28 christos Exp $");
#include <stdint.h>
#include <stdio.h>
#include <stddef.h>
#include "mdef.h"
#include "extern.h"
int32_t end_result;
const char *copy_toeval;
extern void yy_scan_string(const char *);
extern int yyparse(void);
extern int yyerror(const char *);
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;
}