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/* SPDX-License-Identifier: LGPL-3.0-or-later */
/*
* readdir.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#define SQFS_BUILDING_DLL
#include "config.h"
#include "sqfs/meta_reader.h"
#include "sqfs/error.h"
#include "sqfs/dir.h"
#include "compat.h"
#include <stdlib.h>
#include <string.h>
int sqfs_meta_reader_read_dir_header(sqfs_meta_reader_t *m,
sqfs_dir_header_t *hdr)
{
int err = sqfs_meta_reader_read(m, hdr, sizeof(*hdr));
if (err)
return err;
hdr->count = le32toh(hdr->count);
hdr->start_block = le32toh(hdr->start_block);
hdr->inode_number = le32toh(hdr->inode_number);
if (hdr->count > (SQFS_MAX_DIR_ENT - 1))
return SQFS_ERROR_CORRUPTED;
return 0;
}
int sqfs_meta_reader_read_dir_ent(sqfs_meta_reader_t *m,
sqfs_dir_entry_t **result)
{
sqfs_dir_entry_t ent, *out;
sqfs_u16 *diff_u16;
int err;
err = sqfs_meta_reader_read(m, &ent, sizeof(ent));
if (err)
return err;
diff_u16 = (sqfs_u16 *)&ent.inode_diff;
*diff_u16 = le16toh(*diff_u16);
ent.offset = le16toh(ent.offset);
ent.type = le16toh(ent.type);
ent.size = le16toh(ent.size);
out = calloc(1, sizeof(*out) + ent.size + 2);
if (out == NULL)
return SQFS_ERROR_ALLOC;
*out = ent;
err = sqfs_meta_reader_read(m, out->name, ent.size + 1);
if (err) {
free(out);
return err;
}
*result = out;
return 0;
}
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