/*	$OpenBSD: cpy.y,v 1.2 2007/09/15 22:04:39 ray Exp $	*/

/*
 * Copyright (c) 2004 Anders Magnusson (ragge@ludd.luth.se).
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * Copyright(C) Caldera International Inc. 2001-2002. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * Redistributions of source code and documentation must retain the above
 * copyright notice, this list of conditions and the following disclaimer.
 * Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * All advertising materials mentioning features or use of this software
 * must display the following acknowledgement:
 * 	This product includes software developed or owned by Caldera
 *	International, Inc.
 * Neither the name of Caldera International, Inc. nor the names of other
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * USE OF THE SOFTWARE PROVIDED FOR UNDER THIS LICENSE BY CALDERA
 * INTERNATIONAL, INC. AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL CALDERA INTERNATIONAL, INC. BE LIABLE
 * FOR ANY DIRECT, INDIRECT INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OFLIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
 * POSSIBILITY OF SUCH DAMAGE.
 */

%{
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
void yyerror(char *);
int yylex(void);
%}

%term stop
%term EQ NE LE GE LS RS
%term ANDAND OROR IDENT NUMBER
/*
 * The following terminals are not used in the yacc code.
 */
%term STRING FPOINT WSPACE VA_ARGS CONCAT MKSTR ELLIPS

%left ','
%right '='
%right '?' ':'
%left OROR
%left ANDAND
%left '|' '^'
%left '&'
%binary EQ NE
%binary '<' '>' LE GE
%left LS RS
%left '+' '-'
%left '*' '/' '%'
%right '!' '~' UMINUS
%left '(' '.'

%union {
	long long val;
}

%type <val> term NUMBER e

%%
S:	e '\n'	{ return($1 != 0);}


e:	  e '*' e
		{$$ = $1 * $3;}
	| e '/' e
		{$$ = $1 / $3;}
	| e '%' e
		{$$ = $1 % $3;}
	| e '+' e
		{$$ = $1 + $3;}
	| e '-' e
		{$$ = $1 - $3;}
	| e LS e
		{$$ = $1 << $3;}
	| e RS e
		{$$ = $1 >> $3;}
	| e '<' e
		{$$ = $1 < $3;}
	| e '>' e
		{$$ = $1 > $3;}
	| e LE e
		{$$ = $1 <= $3;}
	| e GE e
		{$$ = $1 >= $3;}
	| e EQ e
		{$$ = $1 == $3;}
	| e NE e
		{$$ = $1 != $3;}
	| e '&' e
		{$$ = $1 & $3;}
	| e '^' e
		{$$ = $1 ^ $3;}
	| e '|' e
		{$$ = $1 | $3;}
	| e ANDAND e
		{$$ = $1 && $3;}
	| e OROR e
		{$$ = $1 || $3;}
	| e '?' e ':' e
		{$$ = $1 ? $3 : $5;}
	| e ',' e
		{$$ = $3;}
	| term
		{$$ = $1;}
term:
	  '-' term %prec UMINUS
		{$$ = -$2;}
	| '!' term
		{$$ = !$2;}
	| '~' term
		{$$ = ~$2;}
	| '(' e ')'
		{$$ = $2;}
	| NUMBER
		{$$= $1;}
%%

#include "cpp.h"

void
yyerror(char *err)
{
	error(err);
}