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/* SPDX-License-Identifier: GPL-3.0-or-later */
#include "meta_writer.h"
#include "table.h"
#include "util.h"
#include <endian.h>
#include <stdio.h>
static int sqfs_write_table(int outfd, sqfs_super_t *super, const void *data,
size_t entsize, size_t count, uint64_t *startblock,
compressor_t *cmp)
{
size_t ent_per_blocks = SQFS_META_BLOCK_SIZE / entsize;
uint64_t blocks[count / ent_per_blocks + 1];
size_t i, blkidx = 0, tblsize;
meta_writer_t *m;
ssize_t ret;
/* Write actual data. Whenever we cross a block boundary, remember
the block start offset */
m = meta_writer_create(outfd, cmp);
if (m == NULL)
return -1;
for (i = 0; i < count; ++i) {
if (blkidx == 0 || m->block_offset > blocks[blkidx - 1])
blocks[blkidx++] = m->block_offset;
if (meta_writer_append(m, data, entsize))
goto fail;
data = (const char *)data + entsize;
}
if (meta_writer_flush(m))
goto fail;
for (i = 0; i < blkidx; ++i)
blocks[i] = htole64(blocks[i] + super->bytes_used);
super->bytes_used += m->block_offset;
meta_writer_destroy(m);
/* write new index table */
*startblock = super->bytes_used;
tblsize = sizeof(blocks[0]) * blkidx;
ret = write_retry(outfd, blocks, tblsize);
if (ret < 0) {
perror("writing index table");
return -1;
}
if ((size_t)ret < tblsize) {
fputs("index table truncated\n", stderr);
return -1;
}
super->bytes_used += tblsize;
return 0;
fail:
meta_writer_destroy(m);
return -1;
}
int sqfs_write_fragment_table(int outfd, sqfs_super_t *super,
sqfs_fragment_t *fragments, size_t count,
compressor_t *cmp)
{
super->fragment_entry_count = count;
return sqfs_write_table(outfd, super, fragments, sizeof(fragments[0]),
count, &super->fragment_table_start, cmp);
}
int sqfs_write_ids(int outfd, sqfs_super_t *super, uint32_t *id_tbl,
size_t count, compressor_t *cmp)
{
size_t i;
int ret;
for (i = 0; i < count; ++i)
id_tbl[i] = htole32(id_tbl[i]);
super->id_count = count;
ret = sqfs_write_table(outfd, super, id_tbl, sizeof(id_tbl[0]),
count, &super->id_table_start, cmp);
for (i = 0; i < count; ++i)
id_tbl[i] = htole32(id_tbl[i]);
return ret;
}
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