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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_FILE_H
#define SQFS_FILE_H
#include "common.h"
#include "squashfs_fs.h"
#include "cache.h"
sqfs_err sqfs_frag_entry(sqfs *fs, struct squashfs_fragment_entry *frag,
uint32_t idx);
sqfs_err sqfs_frag_block(sqfs *fs, sqfs_inode *inode,
size_t *offset, size_t *size, sqfs_block **block);
typedef uint32_t sqfs_blocklist_entry;
typedef struct {
sqfs *fs;
size_t remain; /* How many blocks left in the file? */
sqfs_md_cursor cur; /* Points to next blocksize in MD */
bool started;
uint64_t pos;
uint64_t block; /* Points to next data block location */
sqfs_blocklist_entry header; /* Packed blocksize data */
uint32_t input_size; /* Extracted size of this block */
} sqfs_blocklist;
size_t sqfs_blocklist_count(sqfs *fs, sqfs_inode *inode);
void sqfs_blocklist_init(sqfs *fs, sqfs_inode *inode, sqfs_blocklist *bl);
sqfs_err sqfs_blocklist_next(sqfs_blocklist *bl);
sqfs_err sqfs_read_range(sqfs *fs, sqfs_inode *inode, sqfs_off_t start,
sqfs_off_t *size, void *buf);
/*** Block index for skipping to the middle of large files ***/
typedef struct {
uint64_t data_block; /* A data block where the file continues */
uint32_t md_block; /* A metadata block with blocksizes that continue from
data_block */
} sqfs_blockidx_entry;
sqfs_err sqfs_blockidx_init(sqfs_cache *cache);
/* Get a blocklist fast-forwarded to the correct location */
sqfs_err sqfs_blockidx_blocklist(sqfs *fs, sqfs_inode *inode,
sqfs_blocklist *bl, sqfs_off_t start);
#endif
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