1 3b0f3d61 2020-01-22 neels /* Auto-reallocating array for arbitrary member types. */
3 3b0f3d61 2020-01-22 neels * Copyright (c) 2020 Neels Hofmeyr <neels@hofmeyr.de>
5 3b0f3d61 2020-01-22 neels * Permission to use, copy, modify, and distribute this software for any
6 3b0f3d61 2020-01-22 neels * purpose with or without fee is hereby granted, provided that the above
7 3b0f3d61 2020-01-22 neels * copyright notice and this permission notice appear in all copies.
9 3b0f3d61 2020-01-22 neels * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 3b0f3d61 2020-01-22 neels * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 3b0f3d61 2020-01-22 neels * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 3b0f3d61 2020-01-22 neels * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 3b0f3d61 2020-01-22 neels * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 3b0f3d61 2020-01-22 neels * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 3b0f3d61 2020-01-22 neels * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 3b0f3d61 2020-01-22 neels #pragma once
20 3b0f3d61 2020-01-22 neels #ifdef __linux__
21 3b0f3d61 2020-01-22 neels /* stupid shims to compile and test on linux */
22 3b0f3d61 2020-01-22 neels #include <strings.h>
23 3b0f3d61 2020-01-22 neels static inline void *reallocarray(void *buf, size_t n, size_t member_size)
25 3b0f3d61 2020-01-22 neels return realloc(buf, n * member_size);
27 3b0f3d61 2020-01-22 neels static inline void *recallocarray(void *buf, size_t oldn, size_t n, size_t member_size)
29 3b0f3d61 2020-01-22 neels buf = reallocarray(buf, n, member_size);
30 3b0f3d61 2020-01-22 neels bzero(((char*)buf) + (oldn * member_size), (n - oldn) * member_size);
31 3b0f3d61 2020-01-22 neels return buf;
38 3b0f3d61 2020-01-22 neels * ARRAYLIST(any_type_t) list;
40 3b0f3d61 2020-01-22 neels * typedef ARRAYLIST(any_type_t) any_type_list_t;
41 3b0f3d61 2020-01-22 neels * any_type_list_t list;
43 3b0f3d61 2020-01-22 neels * ARRAYLIST_INIT(list, 128); // < number of (at first unused) members to add on each realloc
44 3b0f3d61 2020-01-22 neels * any_type_t *x;
45 3b0f3d61 2020-01-22 neels * while (bar) {
46 3b0f3d61 2020-01-22 neels * ARRAYLIST_ADD(x, list); // < enlarges the allocated array as needed; list.head may change due to realloc
49 3b0f3d61 2020-01-22 neels * *x = random_foo_value;
51 3b0f3d61 2020-01-22 neels * for (i = 0; i < list.len; i++)
52 3b0f3d61 2020-01-22 neels * printf("%s", foo_to_str(list.head[i]));
53 3b0f3d61 2020-01-22 neels * ARRAYLIST_FREE(list);
55 3b0f3d61 2020-01-22 neels #define ARRAYLIST(MEMBER_TYPE) \
57 3b0f3d61 2020-01-22 neels MEMBER_TYPE *head; \
58 3b0f3d61 2020-01-22 neels unsigned int len; \
59 3b0f3d61 2020-01-22 neels unsigned int allocated; \
60 3b0f3d61 2020-01-22 neels unsigned int alloc_blocksize; \
63 3b0f3d61 2020-01-22 neels #define ARRAYLIST_INIT(ARRAY_LIST, ALLOC_BLOCKSIZE) do { \
64 3b0f3d61 2020-01-22 neels (ARRAY_LIST).head = NULL; \
65 3b0f3d61 2020-01-22 neels (ARRAY_LIST).len = 0; \
66 3b0f3d61 2020-01-22 neels (ARRAY_LIST).allocated = 0; \
67 3b0f3d61 2020-01-22 neels (ARRAY_LIST).alloc_blocksize = ALLOC_BLOCKSIZE; \
70 3b0f3d61 2020-01-22 neels #define ARRAYLIST_ADD(NEW_ITEM_P, ARRAY_LIST) do { \
71 3b0f3d61 2020-01-22 neels if ((ARRAY_LIST).len && !(ARRAY_LIST).allocated) { \
72 3b0f3d61 2020-01-22 neels NEW_ITEM_P = NULL; \
75 3b0f3d61 2020-01-22 neels if ((ARRAY_LIST).head == NULL || (ARRAY_LIST).allocated < (ARRAY_LIST).len + 1) { \
76 3b0f3d61 2020-01-22 neels (ARRAY_LIST).allocated += (ARRAY_LIST).alloc_blocksize ? : 8; \
77 3b0f3d61 2020-01-22 neels (ARRAY_LIST).head = recallocarray((ARRAY_LIST).head, (ARRAY_LIST).len, \
78 3b0f3d61 2020-01-22 neels (ARRAY_LIST).allocated, sizeof(*(ARRAY_LIST).head)); \
80 3b0f3d61 2020-01-22 neels if (!(ARRAY_LIST).head || (ARRAY_LIST).allocated < (ARRAY_LIST).len + 1) { \
81 3b0f3d61 2020-01-22 neels NEW_ITEM_P = NULL; \
84 3b0f3d61 2020-01-22 neels (NEW_ITEM_P) = &(ARRAY_LIST).head[(ARRAY_LIST).len]; \
85 3b0f3d61 2020-01-22 neels (ARRAY_LIST).len++; \
86 3b0f3d61 2020-01-22 neels } while (0)
88 3b0f3d61 2020-01-22 neels #define ARRAYLIST_CLEAR(ARRAY_LIST) \
89 3b0f3d61 2020-01-22 neels (ARRAY_LIST).len = 0
91 3b0f3d61 2020-01-22 neels #define ARRAYLIST_FREE(ARRAY_LIST) \
93 3b0f3d61 2020-01-22 neels if ((ARRAY_LIST).head && (ARRAY_LIST).allocated) \
94 3b0f3d61 2020-01-22 neels free((ARRAY_LIST).head); \
95 3b0f3d61 2020-01-22 neels ARRAYLIST_INIT(ARRAY_LIST, (ARRAY_LIST).alloc_blocksize); \