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/* var.c - a typeless variable class
*
* This class is used to represent variable values, which may have any type.
* Among others, it will be used inside rsyslog's expression system, but
* also internally at any place where a typeless variable is needed.
*
* Module begun 2008-02-20 by Rainer Gerhards, with some code taken
* from the obj.c/.h files.
*
* Copyright 2007, 2008 Rainer Gerhards and Adiscon GmbH.
*
* This file is part of rsyslog.
*
* Rsyslog is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Rsyslog is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Rsyslog. If not, see <http://www.gnu.org/licenses/>.
*
* A copy of the GPL can be found in the file "COPYING" in this distribution.
*/
#include "config.h"
#include <stdlib.h>
#include <assert.h>
#include "rsyslog.h"
#include "obj.h"
#include "var.h"
/* static data */
DEFobjStaticHelpers
/* Standard-Constructor
*/
BEGINobjConstruct(var) /* be sure to specify the object type also in END macro! */
ENDobjConstruct(var)
/* ConstructionFinalizer
* rgerhards, 2008-01-09
*/
rsRetVal varConstructFinalize(var_t __attribute__((unused)) *pThis)
{
DEFiRet;
ISOBJ_TYPE_assert(pThis, var);
RETiRet;
}
/* destructor for the var object */
BEGINobjDestruct(var) /* be sure to specify the object type also in END and CODESTART macros! */
CODESTARTobjDestruct(var)
if(pThis->pcsName != NULL)
d_free(pThis->pcsName);
if(pThis->varType == VARTYPE_CSTR) {
if(pThis->val.vpCStr != NULL)
d_free(pThis->val.vpCStr);
}
ENDobjDestruct(var)
/* DebugPrint support for the var object */
BEGINobjDebugPrint(var) /* be sure to specify the object type also in END and CODESTART macros! */
CODESTARTobjDebugPrint(var)
switch(pThis->varType) {
case VARTYPE_CSTR:
dbgoprint((obj_t*) pThis, "type: cstr, val '%s'\n", rsCStrGetSzStr(pThis->val.vpCStr));
break;
default:
dbgoprint((obj_t*) pThis, "type %d currently not suppored in debug output\n", pThis->varType);
break;
}
ENDobjDebugPrint(var)
/* free the current values (destructs objects if necessary)
*/
static rsRetVal
varUnsetValues(var_t *pThis)
{
DEFiRet;
ISOBJ_TYPE_assert(pThis, var);
if(pThis->varType == VARTYPE_CSTR)
rsCStrDestruct(&pThis->val.vpCStr);
pThis->varType = VARTYPE_NONE;
RETiRet;
}
/* set a string value
*/
static rsRetVal
varSetString(var_t *pThis, cstr_t *pCStr)
{
DEFiRet;
ISOBJ_TYPE_assert(pThis, var);
CHKiRet(varUnsetValues(pThis));
pThis->varType = VARTYPE_CSTR;
pThis->val.vpCStr = pCStr;
finalize_it:
RETiRet;
}
/* queryInterface function
* rgerhards, 2008-02-21
*/
BEGINobjQueryInterface(var)
CODESTARTobjQueryInterface(var)
if(pIf->ifVersion != varCURR_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->oID = OBJvar;
pIf->Construct = varConstruct;
pIf->ConstructFinalize = varConstructFinalize;
pIf->Destruct = varDestruct;
pIf->DebugPrint = varDebugPrint;
pIf->SetString = varSetString;
finalize_it:
ENDobjQueryInterface(var)
/* Initialize the var class. Must be called as the very first method
* before anything else is called inside this class.
* rgerhards, 2008-02-19
*/
BEGINObjClassInit(var, 1) /* class, version */
OBJSetMethodHandler(objMethod_DEBUGPRINT, varDebugPrint);
OBJSetMethodHandler(objMethod_CONSTRUCTION_FINALIZER, varConstructFinalize);
ENDObjClassInit(var)
/* vi:set ai:
*/
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