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126 lines
3.5 KiB
C
126 lines
3.5 KiB
C
/* The zlibwrap object.
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*
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* This is an rsyslog object wrapper around zlib.
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*
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* Copyright 2009 Rainer Gerhards and 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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* The rsyslog runtime library is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* The rsyslog runtime library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with the rsyslog runtime library. If not, see <http://www.gnu.org/licenses/>.
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*
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* A copy of the GPL can be found in the file "COPYING" in this distribution.
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* A copy of the LGPL can be found in the file "COPYING.LESSER" in this distribution.
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*/
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#include "config.h"
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#include <string.h>
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#include <assert.h>
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#include <zlib.h>
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#include "rsyslog.h"
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#include "module-template.h"
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#include "obj.h"
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#include "zlibw.h"
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MODULE_TYPE_LIB
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/* static data */
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DEFobjStaticHelpers
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/* ------------------------------ methods ------------------------------ */
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/* zlib make strong use of macros for its interface functions, so we can not simply
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* pass function pointers to them. Instead, we create very small wrappers which call
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* the relevant entry points.
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*/
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static int myDeflateInit(z_streamp strm, int level)
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{
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return deflateInit(strm, level);
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}
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static int myDeflateInit2(z_streamp strm, int level, int method, int windowBits, int memLevel, int strategy)
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{
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return deflateInit2(strm, level, method, windowBits, memLevel, strategy);
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}
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static int myDeflateEnd(z_streamp strm)
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{
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return deflateEnd(strm);
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}
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static int myDeflate(z_streamp strm, int flush)
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{
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return deflate(strm, flush);
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}
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/* queryInterface function
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* rgerhards, 2008-03-05
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*/
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BEGINobjQueryInterface(zlibw)
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CODESTARTobjQueryInterface(zlibw)
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if(pIf->ifVersion != zlibwCURR_IF_VERSION) { /* check for current version, increment on each change */
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ABORT_FINALIZE(RS_RET_INTERFACE_NOT_SUPPORTED);
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}
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/* ok, we have the right interface, so let's fill it
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* Please note that we may also do some backwards-compatibility
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* work here (if we can support an older interface version - that,
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* of course, also affects the "if" above).
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*/
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pIf->DeflateInit = myDeflateInit;
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pIf->DeflateInit2 = myDeflateInit2;
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pIf->Deflate = myDeflate;
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pIf->DeflateEnd = myDeflateEnd;
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finalize_it:
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ENDobjQueryInterface(zlibw)
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/* Initialize the zlibw class. Must be called as the very first method
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* before anything else is called inside this class.
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* rgerhards, 2008-02-19
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*/
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BEGINAbstractObjClassInit(zlibw, 1, OBJ_IS_LOADABLE_MODULE) /* class, version */
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/* request objects we use */
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/* set our own handlers */
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ENDObjClassInit(zlibw)
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/* --------------- here now comes the plumbing that makes as a library module --------------- */
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BEGINmodExit
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CODESTARTmodExit
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ENDmodExit
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BEGINqueryEtryPt
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CODESTARTqueryEtryPt
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CODEqueryEtryPt_STD_LIB_QUERIES
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ENDqueryEtryPt
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BEGINmodInit()
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CODESTARTmodInit
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*ipIFVersProvided = CURR_MOD_IF_VERSION; /* we only support the current interface specification */
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CHKiRet(zlibwClassInit(pModInfo)); /* must be done after tcps_sess, as we use it */
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/* Initialize all classes that are in our module - this includes ourselfs */
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ENDmodInit
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/* vi:set ai:
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*/
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