lib/sqfs/io.c


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39

/* SPDX-License-Identifier: LGPL-3.0-or-later */
/*
 * io.c
 *
 * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
 */
#define SQFS_BUILDING_DLL
#include "config.h"

#include "sqfs/io.h"
#include "sqfs/error.h"
#include "sqfs/block_processor.h"
#include "util.h"

#include <stdlib.h>

int sqfs_file_create_block(sqfs_file_t *file, uint64_t offset,
			   size_t size, void *user, uint32_t flags,
			   sqfs_block_t **out)
{
	sqfs_block_t *blk = alloc_flex(sizeof(*blk), 1, size);
	int err;

	if (blk == NULL)
		return SQFS_ERROR_ALLOC;

	err = file->read_at(file, offset, blk->data, size);
	if (err) {
		free(blk);
		return err;
	}

	blk->user = user;
	blk->size = size;
	blk->flags = flags;

	*out = blk;
	return 0;
}