1 /* $Id: dba_array.c,v 1.1 2016/07/19 21:31:55 schwarze Exp $ */
3 * Copyright (c) 2016 Ingo Schwarze <schwarze@openbsd.org>
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 * Allocation-based arrays for the mandoc database, for read-write access.
18 * The interface is defined in "dba_array.h".
25 #include "mandoc_aux.h"
26 #include "dba_write.h"
27 #include "dba_array.h"
30 void **ep; /* Array of entries. */
31 int32_t *em; /* Array of map positions. */
33 int32_t ea; /* Entries allocated. */
34 int32_t eu; /* Entries used (including deleted). */
35 int32_t ed; /* Entries deleted. */
36 int32_t ec; /* Currently active entry. */
37 int32_t pos; /* Map position of this array. */
42 dba_array_new(int32_t ea, int flags)
44 struct dba_array *array;
47 array = mandoc_malloc(sizeof(*array));
48 array->ep = mandoc_reallocarray(NULL, ea, sizeof(*array->ep));
49 array->em = mandoc_reallocarray(NULL, ea, sizeof(*array->em));
60 dba_array_free(struct dba_array *array)
66 if (array->flags & DBA_STR)
67 for (ie = 0; ie < array->eu; ie++)
75 dba_array_set(struct dba_array *array, int32_t ie, void *entry)
78 assert(ie < array->ea);
79 assert(ie <= array->eu);
82 if (array->flags & DBA_STR)
83 entry = mandoc_strdup(entry);
84 array->ep[ie] = entry;
89 dba_array_add(struct dba_array *array, void *entry)
91 if (array->eu == array->ea) {
92 assert(array->flags & DBA_GROW);
93 array->ep = mandoc_reallocarray(array->ep,
94 2, sizeof(*array->ep) * array->ea);
95 array->em = mandoc_reallocarray(array->em,
96 2, sizeof(*array->em) * array->ea);
99 dba_array_set(array, array->eu, entry);
103 dba_array_get(struct dba_array *array, int32_t ie)
105 if (ie < 0 || ie >= array->eu || array->em[ie] == -1)
107 return array->ep[ie];
111 dba_array_start(struct dba_array *array)
113 array->ec = array->eu;
117 dba_array_next(struct dba_array *array)
119 if (array->ec < array->eu)
123 while (array->ec < array->eu && array->em[array->ec] == -1)
125 return array->ec < array->eu ? array->ep[array->ec] : NULL;
129 dba_array_del(struct dba_array *array)
131 if (array->ec < array->eu && array->em[array->ec] != -1) {
132 array->em[array->ec] = -1;
138 dba_array_undel(struct dba_array *array)
140 memset(array->em, 0, sizeof(*array->em) * array->eu);
144 dba_array_setpos(struct dba_array *array, int32_t ie, int32_t pos)
150 dba_array_getpos(struct dba_array *array)
156 dba_array_sort(struct dba_array *array, dba_compare_func func)
158 assert(array->ed == 0);
159 qsort(array->ep, array->eu, sizeof(*array->ep), func);
163 dba_array_writelen(struct dba_array *array, int32_t nmemb)
165 dba_int_write(array->eu - array->ed);
166 return dba_skip(nmemb, array->eu - array->ed);
170 dba_array_writepos(struct dba_array *array)
174 array->pos = dba_tell();
175 for (ie = 0; ie < array->eu; ie++)
176 if (array->em[ie] != -1)
177 dba_int_write(array->em[ie]);
181 dba_array_writelst(struct dba_array *array)
185 dba_array_FOREACH(array, str)
187 dba_char_write('\0');