window(1): Remove __RCSID & friends.
[dragonfly.git] / usr.bin / window / var.c
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2c872e05 1/* @(#)var.c 8.1 (Berkeley) 6/6/93 */
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2/* $NetBSD: var.c,v 1.10 2009/04/14 08:50:06 lukem Exp $ */
3
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4/*
5 * Copyright (c) 1983, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * Edward Wang at The University of California, Berkeley.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in the
18 * documentation and/or other materials provided with the distribution.
abecab39 19 * 3. Neither the name of the University nor the names of its contributors
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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 REGENTS 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 REGENTS 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
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36#include <stdlib.h>
37#include <string.h>
984263bc 38#include "value.h"
abecab39 39#define EXTERN
984263bc 40#include "var.h"
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41#undef EXTERN
42#include "window_string.h"
984263bc 43
984263bc 44struct var *
abecab39 45var_set1(struct var **head, const char *name, struct value *v)
984263bc 46{
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47 struct var **p;
48 struct var *r;
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49 struct value val;
50
51 /* do this first, easier to recover */
52 val = *v;
53 if (val.v_type == V_STR && val.v_str != 0 &&
54 (val.v_str = str_cpy(val.v_str)) == 0)
55 return 0;
56 if (*(p = var_lookup1(head, name)) == 0) {
57 r = (struct var *) malloc(sizeof (struct var));
58 if (r == 0) {
59 val_free(val);
60 return 0;
61 }
62 if ((r->r_name = str_cpy(name)) == 0) {
63 val_free(val);
64 free((char *) r);
65 return 0;
66 }
67 r->r_left = r->r_right = 0;
68 *p = r;
69 } else {
70 r = *p;
71 val_free(r->r_val);
72 }
73 r->r_val = val;
74 return r;
75}
76
77struct var *
abecab39 78var_setstr1(struct var **head, const char *name, char *str)
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79{
80 struct value v;
81
82 v.v_type = V_STR;
83 v.v_str = str;
84 return var_set1(head, name, &v);
85}
86
87struct var *
abecab39 88var_setnum1(struct var **head, const char *name, int num)
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89{
90 struct value v;
91
92 v.v_type = V_NUM;
93 v.v_num = num;
94 return var_set1(head, name, &v);
95}
96
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97int
98var_unset1(struct var **head, const char *name)
984263bc 99{
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100 struct var **p;
101 struct var *r;
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102
103 if (*(p = var_lookup1(head, name)) == 0)
104 return -1;
105 r = *p;
106 *p = r->r_left;
107 while (*p != 0)
108 p = &(*p)->r_right;
109 *p = r->r_right;
110 val_free(r->r_val);
111 str_free(r->r_name);
112 free((char *) r);
113 return 0;
114}
115
116struct var **
abecab39 117var_lookup1(struct var **p, const char *name)
984263bc 118{
abecab39 119 int cmp;
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120
121 while (*p != 0) {
122 if ((cmp = strcmp(name, (*p)->r_name)) < 0)
123 p = &(*p)->r_left;
124 else if (cmp > 0)
125 p = &(*p)->r_right;
126 else
127 break;
128 }
129 return p;
130}
131
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132int
133var_walk1(struct var *r, int (*func) (void *, struct var *), void *a)
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134{
135 if (r == 0)
136 return 0;
137 if (var_walk1(r->r_left, func, a) < 0 || (*func)(a, r) < 0
138 || var_walk1(r->r_right, func, a) < 0)
139 return -1;
140 return 0;
141}