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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* xfrm.h
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#ifndef IO_XFRM_H
#define IO_XFRM_H
#include "sqfs/predef.h"
#include "xfrm/stream.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @brief Create an input stream that transparently decodes data.
*
* @memberof sqfs_istream_t
*
* This function creates an input stream that wraps an underlying input stream
* that is encoded/compressed and transparently decodes the data when reading
* from it.
*
* @param strm A pointer to another stream that should be wrapped.
* @param xfrm The transformation stream to use.
*
* @return A pointer to an input stream on success, NULL on failure.
*/
SQFS_INTERNAL sqfs_istream_t *istream_xfrm_create(sqfs_istream_t *strm,
xfrm_stream_t *xfrm);
/**
* @brief Create an output stream that transparently encodes data.
*
* @memberof sqfs_ostream_t
*
* This function creates an output stream that transparently encodes
* (e.g. compresses) all data appended to it and writes it to an
* underlying, wrapped output stream.
*
* @param strm A pointer to another stream that should be wrapped.
* @param xfrm The transformation stream to use.
*
* @return A pointer to an output stream on success, NULL on failure.
*/
SQFS_INTERNAL sqfs_ostream_t *ostream_xfrm_create(sqfs_ostream_t *strm,
xfrm_stream_t *xfrm);
#ifdef __cplusplus
}
#endif
#endif /* IO_XFRM_H */
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