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/*
* Copyright (c) 2012 Dave Vasilevsky <dave@vasilevsky.ca>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef SQFS_DIR_H
#define SQFS_DIR_H
#include "common.h"
#include "squashfs_fs.h"
typedef struct {
sqfs_md_cursor cur;
sqfs_off_t offset, total;
struct squashfs_dir_header header;
} sqfs_dir;
typedef struct {
sqfs_inode_id inode;
sqfs_inode_num inode_number;
int type;
char *name;
size_t name_size;
sqfs_off_t offset, next_offset;
} sqfs_dir_entry;
typedef char sqfs_name[SQUASHFS_NAME_LEN + 1];
/* Begin a directory traversal, initializing the dir structure.
If offset is non-zero, fast-forward to that offset in the directory. */
sqfs_err sqfs_dir_open(sqfs *fs, sqfs_inode *inode, sqfs_dir *dir,
off_t offset);
/* Initialize a dir_entry structure before use.
'namebuf' should be a character buffer of enough size to hold any name,
see sqfs_name. It may also be NULL, in which case no names will be placed
into this dir_entry. */
void sqfs_dentry_init(sqfs_dir_entry *entry, char *namebuf);
/* Get the next directory entry, filling in the dir_entry.
Returns false when out of entries, or on error. */
bool sqfs_dir_next(sqfs *fs, sqfs_dir *dir, sqfs_dir_entry *entry,
sqfs_err *err);
/* Lookup an entry in a directory inode.
The dir_entry must have been initialized with a buffer. */
sqfs_err sqfs_dir_lookup(sqfs *fs, sqfs_inode *inode,
const char *name, size_t namelen, sqfs_dir_entry *entry, bool *found);
/* Lookup a complete path, and replace *inode with the results.
Uses / (slash) as the directory separator. */
sqfs_err sqfs_lookup_path(sqfs *fs, sqfs_inode *inode, const char *path,
bool *found);
/* Similar to sqfs_lookup_path, additionaly replaces *id
with sqfs_inode_id of inode */
sqfs_err sqfs_lookup_path_with_id(sqfs *fs, sqfs_inode *inode, const char *path,
bool *found, sqfs_inode_id *id);
/* Accessors on sqfs_dir_entry */
sqfs_off_t sqfs_dentry_offset (sqfs_dir_entry *entry);
sqfs_off_t sqfs_dentry_next_offset (sqfs_dir_entry *entry);
int sqfs_dentry_type (sqfs_dir_entry *entry);
sqfs_mode_t sqfs_dentry_mode (sqfs_dir_entry *entry);
sqfs_inode_id sqfs_dentry_inode (sqfs_dir_entry *entry);
sqfs_inode_num sqfs_dentry_inode_num (sqfs_dir_entry *entry);
size_t sqfs_dentry_name_size (sqfs_dir_entry *entry);
bool sqfs_dentry_is_dir (sqfs_dir_entry *entry);
/* Yields the name of this directory entry, or NULL if the dir_entry structure
was initialized without a name buffer. Name will be nul-terminated. */
const char * sqfs_dentry_name (sqfs_dir_entry *entry);
#endif
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