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      1 /*	$NetBSD: sel-gram.y,v 1.5 2023/06/19 21:41:44 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 2017 Kungliga Tekniska Hgskolan
      5  * (Royal Institute of Technology, Stockholm, Sweden).
      6  * All rights reserved.
      7  *
      8  * Redistribution and use in source and binary forms, with or without
      9  * modification, are permitted provided that the following conditions
     10  * are met:
     11  *
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  *
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * 3. Neither the name of the Institute nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  */
     35 
     36 %{
     37 #ifdef HAVE_CONFIG_H
     38 #include <config.h>
     39 #endif
     40 #include <stdio.h>
     41 #include <stdlib.h>
     42 #include <hx_locl.h>
     43 
     44 %}
     45 
     46 %union {
     47     char *string;
     48     struct hx_expr *expr;
     49 }
     50 
     51 %token kw_TRUE
     52 %token kw_FALSE
     53 %token kw_AND
     54 %token kw_OR
     55 %token kw_IN
     56 %token kw_TAILMATCH
     57 
     58 %type <expr> expr
     59 %type <expr> comp
     60 %type <expr> word words
     61 %type <expr> number
     62 %type <expr> string
     63 %type <expr> function
     64 %type <expr> variable variables
     65 
     66 %token <string> NUMBER
     67 %token <string> STRING
     68 %token <string> IDENTIFIER
     69 
     70 %start start
     71 
     72 %%
     73 
     74 start:	expr			{ _hx509_expr_input.expr = $1; }
     75 
     76 expr	: kw_TRUE		{ $$ = _hx509_make_expr(op_TRUE, NULL, NULL); }
     77 	| kw_FALSE		{ $$ = _hx509_make_expr(op_FALSE, NULL, NULL); }
     78 	| '!' expr		{ $$ = _hx509_make_expr(op_NOT, $2, NULL); }
     79 	| expr kw_AND expr	{ $$ = _hx509_make_expr(op_AND, $1, $3); }
     80 	| expr kw_OR expr	{ $$ = _hx509_make_expr(op_OR, $1, $3); }
     81 	| '(' expr ')'		{ $$ = $2; }
     82 	| comp			{ $$ = _hx509_make_expr(op_COMP, $1, NULL); }
     83 	;
     84 
     85 words	: word			{ $$ = _hx509_make_expr(expr_WORDS, $1, NULL); }
     86 	| word ',' words	{ $$ = _hx509_make_expr(expr_WORDS, $1, $3); }
     87 	;
     88 
     89 comp	: word '=' '=' word	{ $$ = _hx509_make_expr(comp_EQ, $1, $4); }
     90 	| word '!' '=' word	{ $$ = _hx509_make_expr(comp_NE, $1, $4); }
     91 	| word kw_TAILMATCH word { $$ = _hx509_make_expr(comp_TAILEQ, $1, $3); }
     92 	| word kw_IN '(' words ')' { $$ = _hx509_make_expr(comp_IN, $1, $4); }
     93 	| word kw_IN variable	{ $$ = _hx509_make_expr(comp_IN, $1, $3); }
     94 	;
     95 
     96 word	: number		{ $$ = $1; }
     97 	| string		{ $$ = $1; }
     98 	| function		{ $$ = $1; }
     99 	| variable		{ $$ = $1; }
    100 	;
    101 
    102 number	: NUMBER	{ $$ = _hx509_make_expr(expr_NUMBER, $1, NULL); };
    103 string	: STRING	{ $$ = _hx509_make_expr(expr_STRING, $1, NULL); };
    104 
    105 function: IDENTIFIER '(' words ')' {
    106 			$$ = _hx509_make_expr(expr_FUNCTION, $1, $3); }
    107 	;
    108 variable: '%' '{' variables '}'	{ $$ = $3; }
    109 	;
    110 
    111 variables: IDENTIFIER '.' variables 	{
    112 			$$ = _hx509_make_expr(expr_VAR, $1, $3); }
    113 	| IDENTIFIER			{
    114 			$$ = _hx509_make_expr(expr_VAR, $1, NULL); }
    115 	;
    116