| 1 | /*
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| 2 | * Copyright (c) 2011 Martin Sucha
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup libext2
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| 30 | * @{
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| 31 | */
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| 32 | /**
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| 33 | * @file
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| 34 | */
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| 35 |
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| 36 | #ifndef LIBEXT2_LIBEXT2_DIRECTORY_H_
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| 37 | #define LIBEXT2_LIBEXT2_DIRECTORY_H_
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| 38 |
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| 39 | #include <libblock.h>
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| 40 | #include "libext2_filesystem.h"
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| 41 | #include "libext2_inode.h"
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| 42 |
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| 43 | /**
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| 44 | * Linked list directory entry structure
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| 45 | */
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| 46 | typedef struct ext2_directory_entry_ll {
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| 47 | uint32_t inode; // Inode for the entry
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| 48 | uint16_t entry_length; // Distance to the next directory entry
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| 49 | uint8_t name_length; // Lower 8 bits of name length
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| 50 | union {
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| 51 | uint8_t name_length_high; // Higher 8 bits of name length
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| 52 | uint8_t inode_type; // Type of referenced inode (in rev >= 0.5)
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| 53 | } __attribute__ ((packed));
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| 54 | uint8_t name; // First byte of name, if present
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| 55 | } __attribute__ ((packed)) ext2_directory_entry_ll_t;
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| 56 |
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| 57 | typedef struct ext2_directory_iterator {
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| 58 | ext2_filesystem_t *fs;
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| 59 | ext2_inode_ref_t *inode_ref;
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| 60 | block_t *current_block;
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| 61 | aoff64_t current_offset;
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| 62 | ext2_directory_entry_ll_t *current;
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| 63 | } ext2_directory_iterator_t;
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| 64 |
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| 65 |
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| 66 | inline uint32_t ext2_directory_entry_ll_get_inode(ext2_directory_entry_ll_t *);
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| 67 | inline uint16_t ext2_directory_entry_ll_get_entry_length(
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| 68 | ext2_directory_entry_ll_t *);
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| 69 | inline uint16_t ext2_directory_entry_ll_get_name_length(
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| 70 | ext2_superblock_t *, ext2_directory_entry_ll_t *);
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| 71 |
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| 72 | extern int ext2_directory_iterator_init(ext2_directory_iterator_t *,
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| 73 | ext2_filesystem_t *, ext2_inode_ref_t *);
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| 74 | extern int ext2_directory_iterator_next(ext2_directory_iterator_t *);
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| 75 | extern int ext2_directory_iterator_fini(ext2_directory_iterator_t *);
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| 76 |
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| 77 | #endif
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| 78 |
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| 79 | /** @}
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| 80 | */
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