1 /*-
2 * Copyright (c) 2009 The NetBSD Foundation, Inc.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to The NetBSD Foundation
6 * by David A. Holland.
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 * 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 *
17 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
27 * POSSIBILITY OF SUCH DAMAGE.
28 */
29
30 #include <stdlib.h>
31 #include <string.h>
32
33 #define ARRAYINLINE
34 #include "array.h"
35
36 struct array *
array_create(void)37 array_create(void)
38 {
39 struct array *a;
40
41 a = malloc(sizeof(*a));
42 if (a != NULL) {
43 array_init(a);
44 }
45 return a;
46 }
47
48 void
array_destroy(struct array * a)49 array_destroy(struct array *a)
50 {
51 array_cleanup(a);
52 free(a);
53 }
54
55 void
array_init(struct array * a)56 array_init(struct array *a)
57 {
58 a->num = a->max = 0;
59 a->v = NULL;
60 }
61
62 void
array_cleanup(struct array * a)63 array_cleanup(struct array *a)
64 {
65 arrayassert(a->num == 0);
66 free(a->v);
67 #ifdef ARRAYS_CHECKED
68 a->v = NULL;
69 #endif
70 }
71
72 int
array_setsize(struct array * a,unsigned num)73 array_setsize(struct array *a, unsigned num)
74 {
75 unsigned newmax;
76
77 if (num > a->max) {
78 newmax = a->max;
79 while (num > newmax) {
80 newmax = newmax ? newmax*2 : 4;
81 }
82 if (reallocarr(&a->v, newmax, sizeof(*a->v)) != 0)
83 return -1;
84 a->max = newmax;
85 }
86 a->num = num;
87 return 0;
88 }
89
90 int
array_insert(struct array * a,unsigned index_)91 array_insert(struct array *a, unsigned index_)
92 {
93 unsigned movers;
94
95 arrayassert(a->num <= a->max);
96 arrayassert(index_ < a->num);
97
98 movers = a->num - index_;
99
100 if (array_setsize(a, a->num + 1)) {
101 return -1;
102 }
103
104 memmove(a->v + index_+1, a->v + index_, movers*sizeof(*a->v));
105 return 0;
106 }
107
108 void
array_remove(struct array * a,unsigned index_)109 array_remove(struct array *a, unsigned index_)
110 {
111 unsigned movers;
112
113 arrayassert(a->num <= a->max);
114 arrayassert(index_ < a->num);
115
116 movers = a->num - (index_ + 1);
117 memmove(a->v + index_, a->v + index_+1, movers*sizeof(*a->v));
118 a->num--;
119 }
120