1 /* $NetBSD: parser3.c,v 1.6 2003/08/07 11:17:28 agc Exp $ */
4 * Copyright (c) 1983, 1993
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed to Berkeley by
8 * Edward Wang at The University of California, Berkeley.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
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 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 #include <sys/cdefs.h>
38 static char sccsid[] = "@(#)parser3.c 8.1 (Berkeley) 6/6/93";
40 __RCSID("$NetBSD: parser3.c,v 1.6 2003/08/07 11:17:28 agc Exp $");
63 p_expr(struct value *v, char flag)
68 if (p_expr0(&t, flag) < 0)
71 if (token != T_ASSIGN) {
77 p_error("%d: Not a variable.", t.v_num);
82 ret = p_assign(t.v_str, v, flag);
92 p_expr0(struct value *v, char flag)
97 if (p_expr1(v, flag) < 0)
103 true = v->v_num != 0;
106 p_error("?: Numeric left operand required.");
115 if ((flag && true ? p_expr1(v, 1) : p_expr1(&t, 0)) < 0)
117 if (token != T_COLON) {
123 return flag && !true ? p_expr1(v, 1) : p_expr1(&t, 0);
130 p_expr1(struct value *v, char flag)
134 if (p_expr2(v, flag) < 0)
141 v->v_num = true = true || v->v_num != 0;
144 p_error("||: Numeric operands required.");
154 if (p_expr2(v, flag && !true) < 0)
163 p_expr2(struct value *v, char flag)
167 if (p_expr3_10(3, v, flag) < 0)
169 if (token != T_ANDAND)
174 v->v_num = true = true && v->v_num != 0;
177 p_error("&&: Numeric operands required.");
184 if (token != T_ANDAND)
187 if (p_expr3_10(3, v, flag && true) < 0)