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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* write_table.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#define SQFS_BUILDING_DLL
#include "config.h"
#include "sqfs/meta_writer.h"
#include "sqfs/error.h"
#include "sqfs/super.h"
#include "sqfs/table.h"
#include "sqfs/data.h"
#include "sqfs/io.h"
#include "util.h"
#include <endian.h>
#include <stdlib.h>
int sqfs_write_table(sqfs_file_t *file, sqfs_compressor_t *cmp,
const void *data, size_t table_size, uint64_t *start)
{
size_t block_count, list_size, diff, blkidx = 0;
uint64_t off, *locations;
sqfs_meta_writer_t *m;
int ret;
block_count = table_size / SQFS_META_BLOCK_SIZE;
if ((table_size % SQFS_META_BLOCK_SIZE) != 0)
++block_count;
locations = alloc_array(sizeof(uint64_t), block_count);
if (locations == NULL)
return SQFS_ERROR_ALLOC;
/* Write actual data */
m = sqfs_meta_writer_create(file, cmp, false);
if (m == NULL) {
ret = SQFS_ERROR_ALLOC;
goto out_idx;
}
while (table_size > 0) {
locations[blkidx++] = htole64(file->get_size(file));
diff = SQFS_META_BLOCK_SIZE;
if (diff > table_size)
diff = table_size;
ret = sqfs_meta_writer_append(m, data, diff);
if (ret)
goto out;
data = (const char *)data + diff;
table_size -= diff;
}
ret = sqfs_meta_writer_flush(m);
if (ret)
goto out;
/* write location list */
*start = file->get_size(file);
list_size = sizeof(uint64_t) * block_count;
off = file->get_size(file);
ret = file->write_at(file, off, locations, list_size);
if (ret)
goto out;
/* cleanup */
ret = 0;
out:
sqfs_meta_writer_destroy(m);
out_idx:
free(locations);
return ret;
}
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