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90feae08e6
The zstd library provides better and faster compression than zlib. This patch integrates zstd as a dynamically-loadable functionality. As such, no further dependencies need to be added to the rsyslog base package. Due to the increased performance, usage of zstd is highly recommended for high-volume use cases. This patch also refactor zlib compression in order to unify handling in both compression cases.
52 lines
1.9 KiB
C
52 lines
1.9 KiB
C
/* The zlibw object. It encapsulates the zlib functionality. The primary
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* purpose of this wrapper class is to enable rsyslogd core to be build without
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* zlib libraries.
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*
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* Copyright 2009-2022 Adiscon GmbH.
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*
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* This file is part of the rsyslog runtime library.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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* -or-
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* see COPYING.ASL20 in the source distribution
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef INCLUDED_ZLIBW_H
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#define INCLUDED_ZLIBW_H
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#include <zlib.h>
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#include "errmsg.h"
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/* interfaces */
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BEGINinterface(zlibw) /* name must also be changed in ENDinterface macro! */
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int (*DeflateInit)(z_streamp strm, int);
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int (*DeflateInit2)(z_streamp strm, int level, int method, int windowBits, int memLevel, int strategy);
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int (*Deflate)(z_streamp strm, int);
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int (*DeflateEnd)(z_streamp strm);
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rsRetVal (*doStrmWrite)(strm_t *pThis, uchar *const pBuf, const size_t lenBuf, const int bFlush,
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rsRetVal (*strmPhysWrite)(strm_t *pThis, uchar *pBuf, size_t lenBuf) );
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rsRetVal (*doCompressFinish)(strm_t *pThis,
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rsRetVal (*Destruct)(strm_t *pThis, uchar *pBuf, size_t lenBuf) );
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rsRetVal (*Destruct)(strm_t *pThis);
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ENDinterface(zlibw)
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#define zlibwCURR_IF_VERSION 2 /* increment whenever you change the interface structure! */
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/* prototypes */
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PROTOTYPEObj(zlibw);
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/* the name of our library binary */
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#define LM_ZLIBW_FILENAME "lmzlibw"
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#endif /* #ifndef INCLUDED_ZLIBW_H */
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