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gerrit.nordix.org / codeaurora / busybox / f8346038e9899bf7d113d36f89497d854224e2a6 / . / e2fsprogs / ext2fs / bitops.h
blob: 922c31c8563407f52d8b601fd8f5734954ab43e6 [file] [log] [blame]
Mike Frysinger1fd98e02005-05-09 22:10:42 +0000[diff] [blame]1/*
2 * bitops.h --- Bitmap frobbing code. The byte swapping routines are
Tim Rikerc1ef7bd2006-01-25 00:08:53 +0000[diff] [blame]3 * also included here.
4 *
Mike Frysinger1fd98e02005-05-09 22:10:42 +0000[diff] [blame]5 * Copyright (C) 1993, 1994, 1995, 1996 Theodore Ts'o.
6 *
7 * %Begin-Header%
8 * This file may be redistributed under the terms of the GNU Public
9 * License.
10 * %End-Header%
Tim Rikerc1ef7bd2006-01-25 00:08:53 +0000[diff] [blame]11 *
Mike Frysinger1fd98e02005-05-09 22:10:42 +0000[diff] [blame]12 * i386 bitops operations taken from <asm/bitops.h>, Copyright 1992,
13 * Linus Torvalds.
14 */
15
Mike Frysinger179f4172006-03-18 04:13:32 +0000[diff] [blame]16#include <string.h>
Mike Frysingerf98f5e32005-06-11 00:11:46 +0000[diff] [blame]17#include <strings.h>
Mike Frysinger1fd98e02005-05-09 22:10:42 +0000[diff] [blame]18
Mike Frysinger874af852006-03-08 07:03:27 +0000[diff] [blame]19extern int ext2fs_set_bit(unsigned int nr,void * addr);
20extern int ext2fs_clear_bit(unsigned int nr, void * addr);
21extern int ext2fs_test_bit(unsigned int nr, const void * addr);
Mike Frysinger1fd98e02005-05-09 22:10:42 +0000[diff] [blame]22extern __u16 ext2fs_swab16(__u16 val);
23extern __u32 ext2fs_swab32(__u32 val);
24
25#ifdef WORDS_BIGENDIAN
26#define ext2fs_cpu_to_le32(x) ext2fs_swab32((x))
27#define ext2fs_le32_to_cpu(x) ext2fs_swab32((x))
28#define ext2fs_cpu_to_le16(x) ext2fs_swab16((x))
29#define ext2fs_le16_to_cpu(x) ext2fs_swab16((x))
30#define ext2fs_cpu_to_be32(x) ((__u32)(x))
31#define ext2fs_be32_to_cpu(x) ((__u32)(x))
32#define ext2fs_cpu_to_be16(x) ((__u16)(x))
33#define ext2fs_be16_to_cpu(x) ((__u16)(x))
34#else
35#define ext2fs_cpu_to_le32(x) ((__u32)(x))
36#define ext2fs_le32_to_cpu(x) ((__u32)(x))
37#define ext2fs_cpu_to_le16(x) ((__u16)(x))
38#define ext2fs_le16_to_cpu(x) ((__u16)(x))
39#define ext2fs_cpu_to_be32(x) ext2fs_swab32((x))
40#define ext2fs_be32_to_cpu(x) ext2fs_swab32((x))
41#define ext2fs_cpu_to_be16(x) ext2fs_swab16((x))
42#define ext2fs_be16_to_cpu(x) ext2fs_swab16((x))
43#endif
44
45/*
46 * EXT2FS bitmap manipulation routines.
47 */
48
49/* Support for sending warning messages from the inline subroutines */
50extern const char *ext2fs_block_string;
51extern const char *ext2fs_inode_string;
52extern const char *ext2fs_mark_string;
53extern const char *ext2fs_unmark_string;
54extern const char *ext2fs_test_string;
55extern void ext2fs_warn_bitmap(errcode_t errcode, unsigned long arg,
56 const char *description);
57extern void ext2fs_warn_bitmap2(ext2fs_generic_bitmap bitmap,
58 int code, unsigned long arg);
59
60extern int ext2fs_mark_block_bitmap(ext2fs_block_bitmap bitmap, blk_t block);
61extern int ext2fs_unmark_block_bitmap(ext2fs_block_bitmap bitmap,
62 blk_t block);
63extern int ext2fs_test_block_bitmap(ext2fs_block_bitmap bitmap, blk_t block);
64
65extern int ext2fs_mark_inode_bitmap(ext2fs_inode_bitmap bitmap, ext2_ino_t inode);
66extern int ext2fs_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap,
67 ext2_ino_t inode);
68extern int ext2fs_test_inode_bitmap(ext2fs_inode_bitmap bitmap, ext2_ino_t inode);
69
70extern void ext2fs_fast_mark_block_bitmap(ext2fs_block_bitmap bitmap,
71 blk_t block);
72extern void ext2fs_fast_unmark_block_bitmap(ext2fs_block_bitmap bitmap,
73 blk_t block);
74extern int ext2fs_fast_test_block_bitmap(ext2fs_block_bitmap bitmap,
75 blk_t block);
76
77extern void ext2fs_fast_mark_inode_bitmap(ext2fs_inode_bitmap bitmap,
78 ext2_ino_t inode);
79extern void ext2fs_fast_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap,
80 ext2_ino_t inode);
81extern int ext2fs_fast_test_inode_bitmap(ext2fs_inode_bitmap bitmap,
82 ext2_ino_t inode);
83extern blk_t ext2fs_get_block_bitmap_start(ext2fs_block_bitmap bitmap);
84extern ext2_ino_t ext2fs_get_inode_bitmap_start(ext2fs_inode_bitmap bitmap);
85extern blk_t ext2fs_get_block_bitmap_end(ext2fs_block_bitmap bitmap);
86extern ext2_ino_t ext2fs_get_inode_bitmap_end(ext2fs_inode_bitmap bitmap);
87
88extern void ext2fs_mark_block_bitmap_range(ext2fs_block_bitmap bitmap,
89 blk_t block, int num);
90extern void ext2fs_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap,
91 blk_t block, int num);
92extern int ext2fs_test_block_bitmap_range(ext2fs_block_bitmap bitmap,
93 blk_t block, int num);
94extern void ext2fs_fast_mark_block_bitmap_range(ext2fs_block_bitmap bitmap,
95 blk_t block, int num);
96extern void ext2fs_fast_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap,
97 blk_t block, int num);
98extern int ext2fs_fast_test_block_bitmap_range(ext2fs_block_bitmap bitmap,
99 blk_t block, int num);
100extern void ext2fs_set_bitmap_padding(ext2fs_generic_bitmap map);
101
102/* These two routines moved to gen_bitmap.c */
103extern int ext2fs_mark_generic_bitmap(ext2fs_generic_bitmap bitmap,
104 __u32 bitno);
105extern int ext2fs_unmark_generic_bitmap(ext2fs_generic_bitmap bitmap,
106 blk_t bitno);