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/*
* ngtcp2
*
* Copyright (c) 2025 ngtcp2 contributors
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef NGTCP2_CALLBACKS_H
#define NGTCP2_CALLBACKS_H
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif /* defined(HAVE_CONFIG_H) */
#include <ngtcp2/ngtcp2.h>
/*
* ngtcp2_callbacks_convert_to_latest converts |src| of version
* |callbacks_version| to the latest version NGTCP2_CALLBACKS_VERSION.
*
* |dest| must point to the latest version. |src| may be the older
* version, and if so, it may have fewer fields. Accessing those
* fields causes undefined behavior.
*
* If |callbacks_version| == NGTCP2_CALLBACKS_VERSION, no conversion
* is made, and |src| is returned. Otherwise, first |dest| is
* zero-initialized, and then all valid fields in |src| are copied
* into |dest|. Finally, |dest| is returned.
*/
const ngtcp2_callbacks *ngtcp2_callbacks_convert_to_latest(
ngtcp2_callbacks *dest, int callbacks_version, const ngtcp2_callbacks *src);
/*
* ngtcp2_callbacks_convert_to_old converts |src| of the latest
* version to |dest| of version |callbacks_version|.
*
* |callbacks_version| must not be the latest version
* NGTCP2_CALLBACKS_VERSION.
*
* |dest| points to the older version, and it may have fewer fields.
* Accessing those fields causes undefined behavior.
*
* This function copies all valid fields in version
* |callbacks_version| from |src| to |dest|.
*/
void ngtcp2_callbacks_convert_to_old(int callbacks_version,
ngtcp2_callbacks *dest,
const ngtcp2_callbacks *src);
/*
* ngtcp2_callbackslen_version returns the effective length of
* ngtcp2_callbacks at the version |callbacks_version|.
*/
size_t ngtcp2_callbackslen_version(int callbacks_version);
#endif /* !defined(NGTCP2_CALLBACKS_H) */
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