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gerrit.nordix.org / codeaurora / busybox / 215c61d3c2830113479ce008d9c1d7e3978ad9c1 / . / e2fsprogs / ext2fs / bitops.h
blob: 6dd30862bd98cd8d86d627559044b37b04f18061 [file] [log] [blame]
"Robert P. J. Day"63fc1a92006-07-02 19:47:05 +0000[diff] [blame]1/* vi: set sw=4 ts=4: */
Mike Frysinger1fd98e02005-05-09 22:10:42 +0000[diff] [blame]2/*
3 * bitops.h --- Bitmap frobbing code. The byte swapping routines are
Tim Rikerc1ef7bd2006-01-25 00:08:53 +0000[diff] [blame]4 * also included here.
5 *
Mike Frysinger1fd98e02005-05-09 22:10:42 +0000[diff] [blame]6 * Copyright (C) 1993, 1994, 1995, 1996 Theodore Ts'o.
7 *
8 * %Begin-Header%
9 * This file may be redistributed under the terms of the GNU Public
10 * License.
11 * %End-Header%
Tim Rikerc1ef7bd2006-01-25 00:08:53 +0000[diff] [blame]12 *
Mike Frysinger1fd98e02005-05-09 22:10:42 +0000[diff] [blame]13 * i386 bitops operations taken from <asm/bitops.h>, Copyright 1992,
14 * Linus Torvalds.
15 */
16
Mike Frysinger179f4172006-03-18 04:13:32 +0000[diff] [blame]17#include <string.h>
Mike Frysingerf98f5e32005-06-11 00:11:46 +0000[diff] [blame]18#include <strings.h>
Mike Frysinger1fd98e02005-05-09 22:10:42 +0000[diff] [blame]19
Mike Frysinger874af852006-03-08 07:03:27 +0000[diff] [blame]20extern int ext2fs_set_bit(unsigned int nr,void * addr);
21extern int ext2fs_clear_bit(unsigned int nr, void * addr);
22extern int ext2fs_test_bit(unsigned int nr, const void * addr);
Mike Frysinger1fd98e02005-05-09 22:10:42 +0000[diff] [blame]23extern __u16 ext2fs_swab16(__u16 val);
24extern __u32 ext2fs_swab32(__u32 val);
25
26#ifdef WORDS_BIGENDIAN
27#define ext2fs_cpu_to_le32(x) ext2fs_swab32((x))
28#define ext2fs_le32_to_cpu(x) ext2fs_swab32((x))
29#define ext2fs_cpu_to_le16(x) ext2fs_swab16((x))
30#define ext2fs_le16_to_cpu(x) ext2fs_swab16((x))
31#define ext2fs_cpu_to_be32(x) ((__u32)(x))
32#define ext2fs_be32_to_cpu(x) ((__u32)(x))
33#define ext2fs_cpu_to_be16(x) ((__u16)(x))
34#define ext2fs_be16_to_cpu(x) ((__u16)(x))
35#else
36#define ext2fs_cpu_to_le32(x) ((__u32)(x))
37#define ext2fs_le32_to_cpu(x) ((__u32)(x))
38#define ext2fs_cpu_to_le16(x) ((__u16)(x))
39#define ext2fs_le16_to_cpu(x) ((__u16)(x))
40#define ext2fs_cpu_to_be32(x) ext2fs_swab32((x))
41#define ext2fs_be32_to_cpu(x) ext2fs_swab32((x))
42#define ext2fs_cpu_to_be16(x) ext2fs_swab16((x))
43#define ext2fs_be16_to_cpu(x) ext2fs_swab16((x))
44#endif
45
46/*
47 * EXT2FS bitmap manipulation routines.
48 */
49
50/* Support for sending warning messages from the inline subroutines */
51extern const char *ext2fs_block_string;
52extern const char *ext2fs_inode_string;
53extern const char *ext2fs_mark_string;
54extern const char *ext2fs_unmark_string;
55extern const char *ext2fs_test_string;
56extern void ext2fs_warn_bitmap(errcode_t errcode, unsigned long arg,
57 const char *description);
58extern void ext2fs_warn_bitmap2(ext2fs_generic_bitmap bitmap,
59 int code, unsigned long arg);
60
61extern int ext2fs_mark_block_bitmap(ext2fs_block_bitmap bitmap, blk_t block);
62extern int ext2fs_unmark_block_bitmap(ext2fs_block_bitmap bitmap,
63 blk_t block);
64extern int ext2fs_test_block_bitmap(ext2fs_block_bitmap bitmap, blk_t block);
65
66extern int ext2fs_mark_inode_bitmap(ext2fs_inode_bitmap bitmap, ext2_ino_t inode);
67extern int ext2fs_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap,
68 ext2_ino_t inode);
69extern int ext2fs_test_inode_bitmap(ext2fs_inode_bitmap bitmap, ext2_ino_t inode);
70
71extern void ext2fs_fast_mark_block_bitmap(ext2fs_block_bitmap bitmap,
72 blk_t block);
73extern void ext2fs_fast_unmark_block_bitmap(ext2fs_block_bitmap bitmap,
74 blk_t block);
75extern int ext2fs_fast_test_block_bitmap(ext2fs_block_bitmap bitmap,
76 blk_t block);
77
78extern void ext2fs_fast_mark_inode_bitmap(ext2fs_inode_bitmap bitmap,
79 ext2_ino_t inode);
80extern void ext2fs_fast_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap,
81 ext2_ino_t inode);
82extern int ext2fs_fast_test_inode_bitmap(ext2fs_inode_bitmap bitmap,
83 ext2_ino_t inode);
84extern blk_t ext2fs_get_block_bitmap_start(ext2fs_block_bitmap bitmap);
85extern ext2_ino_t ext2fs_get_inode_bitmap_start(ext2fs_inode_bitmap bitmap);
86extern blk_t ext2fs_get_block_bitmap_end(ext2fs_block_bitmap bitmap);
87extern ext2_ino_t ext2fs_get_inode_bitmap_end(ext2fs_inode_bitmap bitmap);
88
89extern void ext2fs_mark_block_bitmap_range(ext2fs_block_bitmap bitmap,
90 blk_t block, int num);
91extern void ext2fs_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap,
92 blk_t block, int num);
93extern int ext2fs_test_block_bitmap_range(ext2fs_block_bitmap bitmap,
94 blk_t block, int num);
95extern void ext2fs_fast_mark_block_bitmap_range(ext2fs_block_bitmap bitmap,
96 blk_t block, int num);
97extern void ext2fs_fast_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap,
98 blk_t block, int num);
99extern int ext2fs_fast_test_block_bitmap_range(ext2fs_block_bitmap bitmap,
100 blk_t block, int num);
101extern void ext2fs_set_bitmap_padding(ext2fs_generic_bitmap map);
102
103/* These two routines moved to gen_bitmap.c */
104extern int ext2fs_mark_generic_bitmap(ext2fs_generic_bitmap bitmap,
105 __u32 bitno);
106extern int ext2fs_unmark_generic_bitmap(ext2fs_generic_bitmap bitmap,
107 blk_t bitno);