2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
6 * Edward Wang at The University of California, Berkeley.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * @(#)parser5.c 8.1 (Berkeley) 6/6/93
37 * $FreeBSD: src/usr.bin/window/parser5.c,v 1.1.1.1.14.1 2001/05/17 09:45:00 obrien Exp $
38 * $DragonFly: src/usr.bin/window/parser5.c,v 1.2 2003/06/17 04:29:34 dillon Exp $
48 register struct value *v;
74 return p_expr12(v, flag);
78 if (p_expr11(v, flag) < 0)
88 p_error("%s: Numeric operand required.", opname);
100 if (v->v_type == V_NUM) {
101 int tmp = cx.x_type == X_BUF && cx.x_arg != 0 &&
102 v->v_num > 0 && v->v_num <= cx.x_narg;
106 *v = cx.x_arg[v->v_num - 1];
108 p_error("%d: No such argument.", v->v_num);
112 char *name = v->v_str;
113 struct var *r = var_lookup(name);
120 p_error("%s: Undefined variable.", name);
125 if (v->v_type == V_STR && (v->v_str = str_cpy(v->v_str)) == 0) {
131 v->v_num = - v->v_num;
134 v->v_num = ! v->v_num;
137 v->v_num = ~ v->v_num;
144 * string, number, ( expr )
145 * Plus function calls.
147 * Always return v_type == V_ERR when flag == 0.
150 register struct value *v;
158 v->v_num = token_num;
165 v->v_str = token_str;
172 if (p_expr(v, flag) < 0) {
186 while (token == T_LP) {
189 if (p_convstr(v) < 0)
191 cmd = v->v_type == V_STR ? v->v_str : 0;
192 if (p_function(cmd, v, flag) < 0) {