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/* SPDX-License-Identifier: LGPL-3.0-or-later */
/*
* meta_writer.h - This file is part of libsquashfs
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef SQFS_META_WRITER_H
#define SQFS_META_WRITER_H
#include "sqfs/predef.h"
#ifdef __cplusplus
extern "C" {
#endif
/* Create a meta data reader using a given compressor to compress data.
Internally prints error message to stderr on failure.
If keep_in_mem is true, the blocks are collected in memory and must
be explicitly flushed to disk using meta_write_write_to_file.
*/
SQFS_API sqfs_meta_writer_t *sqfs_meta_writer_create(sqfs_file_t *file,
sqfs_compressor_t *cmp,
bool keep_in_mem);
SQFS_API void sqfs_meta_writer_destroy(sqfs_meta_writer_t *m);
/* Compress and flush the currently unfinished block to disk. Returns 0 on
success, internally prints error message to stderr on failure */
SQFS_API int sqfs_meta_writer_flush(sqfs_meta_writer_t *m);
/* Returns 0 on success. Prints error message to stderr on failure. */
SQFS_API int sqfs_meta_writer_append(sqfs_meta_writer_t *m, const void *data,
size_t size);
/* Query the current block start position and offset within the block */
SQFS_API void sqfs_meta_writer_get_position(const sqfs_meta_writer_t *m,
uint64_t *block_start,
uint32_t *offset);
/* Reset all internal state, including the current block start position. */
SQFS_API void sqfs_meta_writer_reset(sqfs_meta_writer_t *m);
/* If created with keep_in_mem true, write the collected blocks to disk.
Does not flush the current block. Writes error messages to stderr and
returns non-zero on failure. */
SQFS_API int sqfs_meta_write_write_to_file(sqfs_meta_writer_t *m);
SQFS_API int sqfs_meta_writer_write_inode(sqfs_meta_writer_t *iw,
sqfs_inode_generic_t *n);
#ifdef __cplusplus
}
#endif
#endif /* SQFS_META_WRITER_H */
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