1 /* $NetBSD: parser5.c,v 1.7 2009/04/14 08:50:06 lukem 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[] = "@(#)parser5.c 8.1 (Berkeley) 6/6/93";
40 __RCSID("$NetBSD: parser5.c,v 1.7 2009/04/14 08:50:06 lukem Exp $");
52 p_expr11(struct value *v, char flag)
77 return p_expr12(v, flag);
81 if (p_expr11(v, flag) < 0)
91 p_error("%s: Numeric operand required.", opname);
103 if (v->v_type == V_NUM) {
104 int tmp = cx.x_type == X_BUF && cx.x_arg != 0 &&
105 v->v_num > 0 && v->v_num <= cx.x_narg;
109 *v = cx.x_arg[v->v_num - 1];
111 p_error("%d: No such argument.", v->v_num);
115 char *name = v->v_str;
116 struct var *r = var_lookup(name);
123 p_error("%s: Undefined variable.", name);
128 if (v->v_type == V_STR && (v->v_str = str_cpy(v->v_str)) == 0) {
134 v->v_num = - v->v_num;
137 v->v_num = ! v->v_num;
140 v->v_num = ~ v->v_num;
147 * string, number, ( expr )
148 * Plus function calls.
150 * Always return v_type == V_ERR when flag == 0.
153 p_expr12(struct value *v, char flag)
160 v->v_num = token_num;
167 v->v_str = token_str;
174 if (p_expr(v, flag) < 0) {
188 while (token == T_LP) {
191 if (p_convstr(v) < 0)
193 cmd = v->v_type == V_STR ? v->v_str : 0;
194 if (p_function(cmd, v, flag) < 0) {