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