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/* The zlibwrap object.
*
* This is an rsyslog object wrapper around zlib.
*
* Copyright 2009-2012 Rainer Gerhards and Adiscon GmbH.
*
* This file is part of the rsyslog runtime library.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
* -or-
* see COPYING.ASL20 in the source distribution
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "config.h"
#include <string.h>
#include <assert.h>
#include <zlib.h>
#include "rsyslog.h"
#include "module-template.h"
#include "obj.h"
#include "zlibw.h"
MODULE_TYPE_LIB
MODULE_TYPE_NOKEEP
/* static data */
DEFobjStaticHelpers
/* ------------------------------ methods ------------------------------ */
/* zlib make strong use of macros for its interface functions, so we can not simply
* pass function pointers to them. Instead, we create very small wrappers which call
* the relevant entry points.
*/
static int myDeflateInit(z_streamp strm, int level)
{
return deflateInit(strm, level);
}
static int myDeflateInit2(z_streamp strm, int level, int method, int windowBits, int memLevel, int strategy)
{
return deflateInit2(strm, level, method, windowBits, memLevel, strategy);
}
static int myDeflateEnd(z_streamp strm)
{
return deflateEnd(strm);
}
static int myDeflate(z_streamp strm, int flush)
{
return deflate(strm, flush);
}
/* queryInterface function
* rgerhards, 2008-03-05
*/
BEGINobjQueryInterface(zlibw)
CODESTARTobjQueryInterface(zlibw)
if(pIf->ifVersion != zlibwCURR_IF_VERSION) { /* check for current version, increment on each change */
ABORT_FINALIZE(RS_RET_INTERFACE_NOT_SUPPORTED);
}
/* ok, we have the right interface, so let's fill it
* Please note that we may also do some backwards-compatibility
* work here (if we can support an older interface version - that,
* of course, also affects the "if" above).
*/
pIf->DeflateInit = myDeflateInit;
pIf->DeflateInit2 = myDeflateInit2;
pIf->Deflate = myDeflate;
pIf->DeflateEnd = myDeflateEnd;
finalize_it:
ENDobjQueryInterface(zlibw)
/* Initialize the zlibw class. Must be called as the very first method
* before anything else is called inside this class.
* rgerhards, 2008-02-19
*/
BEGINAbstractObjClassInit(zlibw, 1, OBJ_IS_LOADABLE_MODULE) /* class, version */
/* request objects we use */
/* set our own handlers */
ENDObjClassInit(zlibw)
/* --------------- here now comes the plumbing that makes as a library module --------------- */
BEGINmodExit
CODESTARTmodExit
ENDmodExit
BEGINqueryEtryPt
CODESTARTqueryEtryPt
CODEqueryEtryPt_STD_LIB_QUERIES
ENDqueryEtryPt
BEGINmodInit()
CODESTARTmodInit
*ipIFVersProvided = CURR_MOD_IF_VERSION; /* we only support the current interface specification */
CHKiRet(zlibwClassInit(pModInfo)); /* must be done after tcps_sess, as we use it */
/* Initialize all classes that are in our module - this includes ourselfs */
ENDmodInit
/* vi:set ai:
*/
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