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    Contents of /trunk/mkinitrd-magellan/busybox/e2fsprogs/old_e2fsprogs/ext2fs/bitops.h

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    Revision 816 - (show annotations) (download)
    Fri Apr 24 18:33:46 2009 UTC (15 years, 1 month ago) by niro
    File MIME type: text/plain
    File size: 4285 byte(s) 
    -updated to busybox-1.13.4
    1 /* vi: set sw=4 ts=4: */
    2 /*
    3 * bitops.h --- Bitmap frobbing code. The byte swapping routines are
    4 * also included here.
    5 *
    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%
    12 *
    13 * i386 bitops operations taken from <asm/bitops.h>, Copyright 1992,
    14 * Linus Torvalds.
    15 */
    16
    17 #include <string.h>
    18 //#include <strings.h>
    19
    20 extern int ext2fs_set_bit(unsigned int nr,void * addr);
    21 extern int ext2fs_clear_bit(unsigned int nr, void * addr);
    22 extern int ext2fs_test_bit(unsigned int nr, const void * addr);
    23 extern __u16 ext2fs_swab16(__u16 val);
    24 extern __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 */
    51 extern const char *ext2fs_block_string;
    52 extern const char *ext2fs_inode_string;
    53 extern const char *ext2fs_mark_string;
    54 extern const char *ext2fs_unmark_string;
    55 extern const char *ext2fs_test_string;
    56 extern void ext2fs_warn_bitmap(errcode_t errcode, unsigned long arg,
    57 const char *description);
    58 extern void ext2fs_warn_bitmap2(ext2fs_generic_bitmap bitmap,
    59 int code, unsigned long arg);
    60
    61 extern int ext2fs_mark_block_bitmap(ext2fs_block_bitmap bitmap, blk_t block);
    62 extern int ext2fs_unmark_block_bitmap(ext2fs_block_bitmap bitmap,
    63 blk_t block);
    64 extern int ext2fs_test_block_bitmap(ext2fs_block_bitmap bitmap, blk_t block);
    65
    66 extern int ext2fs_mark_inode_bitmap(ext2fs_inode_bitmap bitmap, ext2_ino_t inode);
    67 extern int ext2fs_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap,
    68 ext2_ino_t inode);
    69 extern int ext2fs_test_inode_bitmap(ext2fs_inode_bitmap bitmap, ext2_ino_t inode);
    70
    71 extern void ext2fs_fast_mark_block_bitmap(ext2fs_block_bitmap bitmap,
    72 blk_t block);
    73 extern void ext2fs_fast_unmark_block_bitmap(ext2fs_block_bitmap bitmap,
    74 blk_t block);
    75 extern int ext2fs_fast_test_block_bitmap(ext2fs_block_bitmap bitmap,
    76 blk_t block);
    77
    78 extern void ext2fs_fast_mark_inode_bitmap(ext2fs_inode_bitmap bitmap,
    79 ext2_ino_t inode);
    80 extern void ext2fs_fast_unmark_inode_bitmap(ext2fs_inode_bitmap bitmap,
    81 ext2_ino_t inode);
    82 extern int ext2fs_fast_test_inode_bitmap(ext2fs_inode_bitmap bitmap,
    83 ext2_ino_t inode);
    84 extern blk_t ext2fs_get_block_bitmap_start(ext2fs_block_bitmap bitmap);
    85 extern ext2_ino_t ext2fs_get_inode_bitmap_start(ext2fs_inode_bitmap bitmap);
    86 extern blk_t ext2fs_get_block_bitmap_end(ext2fs_block_bitmap bitmap);
    87 extern ext2_ino_t ext2fs_get_inode_bitmap_end(ext2fs_inode_bitmap bitmap);
    88
    89 extern void ext2fs_mark_block_bitmap_range(ext2fs_block_bitmap bitmap,
    90 blk_t block, int num);
    91 extern void ext2fs_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap,
    92 blk_t block, int num);
    93 extern int ext2fs_test_block_bitmap_range(ext2fs_block_bitmap bitmap,
    94 blk_t block, int num);
    95 extern void ext2fs_fast_mark_block_bitmap_range(ext2fs_block_bitmap bitmap,
    96 blk_t block, int num);
    97 extern void ext2fs_fast_unmark_block_bitmap_range(ext2fs_block_bitmap bitmap,
    98 blk_t block, int num);
    99 extern int ext2fs_fast_test_block_bitmap_range(ext2fs_block_bitmap bitmap,
    100 blk_t block, int num);
    101 extern void ext2fs_set_bitmap_padding(ext2fs_generic_bitmap map);
    102
    103 /* These two routines moved to gen_bitmap.c */
    104 extern int ext2fs_mark_generic_bitmap(ext2fs_generic_bitmap bitmap,
    105 __u32 bitno);
    106 extern int ext2fs_unmark_generic_bitmap(ext2fs_generic_bitmap bitmap,
    107 blk_t bitno);