2 * Copyright (c) 2013 Grzegorz Kostka (kostka.grzegorz@gmail.com)
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * - The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 /** @addtogroup lwext4
34 * @brief Block/inode bitmap allocator.
37 #include "ext4_config.h"
38 #include "ext4_bitmap.h"
40 #include "ext4_errno.h"
42 void ext4_bmap_bits_free(uint8_t *bmap, uint32_t sbit, uint32_t bcnt)
51 ext4_bmap_bit_clr(bmap, i);
60 *(uint32_t *)bmap = 0;
67 *(uint16_t *)bmap = 0;
80 for (i = 0; i < bcnt; ++i) {
81 ext4_bmap_bit_clr(bmap, i);
85 int ext4_bmap_bit_find_clr(uint8_t *bmap, uint32_t sbit, uint32_t ebit,
89 uint32_t bcnt = ebit - sbit;
98 if (ext4_bmap_is_bit_clr(bmap, i)) {
111 if (*(uint32_t *)bmap != 0xFFFFFFFF)
120 if (*(uint16_t *)bmap != 0xFFFF)
131 for (i = 0; i < 8; ++i) {
132 if (ext4_bmap_is_bit_clr(bmap, i)) {
144 for (i = 0; i < bcnt; ++i) {
145 if (ext4_bmap_is_bit_clr(bmap, i)) {