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Diffstat (limited to 'vmop.c')
| -rw-r--r-- | vmop.c | 235 |
1 files changed, 235 insertions, 0 deletions
@@ -0,0 +1,235 @@ +/* vmop.c - abstracts an operation (instructed) supported by the + * rsyslog virtual machine + * + * Module begun 2008-02-20 by Rainer Gerhards + * + * Copyright 2007, 2008 Rainer Gerhards and Adiscon GmbH. + * + * This file is part of the rsyslog runtime library. + * + * The rsyslog runtime library is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * The rsyslog runtime library 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 Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with the rsyslog runtime library. If not, see <http://www.gnu.org/licenses/>. + * + * A copy of the GPL can be found in the file "COPYING" in this distribution. + * A copy of the LGPL can be found in the file "COPYING.LESSER" in this distribution. + */ + +#include "config.h" +#include <stdlib.h> +#include <assert.h> + +#include "rsyslog.h" +#include "obj.h" +#include "vmop.h" + +/* static data */ +DEFobjStaticHelpers +DEFobjCurrIf(var) + + +/* forward definitions */ +static rsRetVal vmopOpcode2Str(vmop_t *pThis, uchar **ppName); + +/* Standard-Constructor + */ +BEGINobjConstruct(vmop) /* be sure to specify the object type also in END macro! */ +ENDobjConstruct(vmop) + + +/* ConstructionFinalizer + * rgerhards, 2008-01-09 + */ +rsRetVal vmopConstructFinalize(vmop_t __attribute__((unused)) *pThis) +{ + DEFiRet; + ISOBJ_TYPE_assert(pThis, vmop); + RETiRet; +} + + +/* destructor for the vmop object */ +BEGINobjDestruct(vmop) /* be sure to specify the object type also in END and CODESTART macros! */ +CODESTARTobjDestruct(vmop) + if( pThis->opcode == opcode_PUSHSYSVAR + || pThis->opcode == opcode_PUSHMSGVAR + || pThis->opcode == opcode_PUSHCONSTANT) { + if(pThis->operand.pVar != NULL) + var.Destruct(&pThis->operand.pVar); + } +ENDobjDestruct(vmop) + + +/* DebugPrint support for the vmop object */ +BEGINobjDebugPrint(vmop) /* be sure to specify the object type also in END and CODESTART macros! */ + uchar *pOpcodeName; +CODESTARTobjDebugPrint(vmop) + vmopOpcode2Str(pThis, &pOpcodeName); + dbgoprint((obj_t*) pThis, "opcode: %d\t(%s), next %p, var in next line\n", (int) pThis->opcode, pOpcodeName, + pThis->pNext); + if(pThis->operand.pVar != NULL) + var.DebugPrint(pThis->operand.pVar); +ENDobjDebugPrint(vmop) + + +/* set operand (variant case) + * rgerhards, 2008-02-20 + */ +static rsRetVal +vmopSetVar(vmop_t *pThis, var_t *pVar) +{ + DEFiRet; + ISOBJ_TYPE_assert(pThis, vmop); + ISOBJ_TYPE_assert(pVar, var); + pThis->operand.pVar = pVar; + RETiRet; +} + + +/* set operation + * rgerhards, 2008-02-20 + */ +static rsRetVal +vmopSetOpcode(vmop_t *pThis, opcode_t opcode) +{ + DEFiRet; + ISOBJ_TYPE_assert(pThis, vmop); + pThis->opcode = opcode; + RETiRet; +} + + +/* a way to turn an opcode into a readable string + */ +static rsRetVal +vmopOpcode2Str(vmop_t *pThis, uchar **ppName) +{ + DEFiRet; + ISOBJ_TYPE_assert(pThis, vmop); + + switch(pThis->opcode) { + case opcode_OR: + *ppName = (uchar*) "or"; + break; + case opcode_AND: + *ppName = (uchar*) "and"; + break; + case opcode_PLUS: + *ppName = (uchar*) "+"; + break; + case opcode_MINUS: + *ppName = (uchar*) "-"; + break; + case opcode_TIMES: + *ppName = (uchar*) "*"; + break; + case opcode_DIV: + *ppName = (uchar*) "/"; + break; + case opcode_MOD: + *ppName = (uchar*) "%"; + break; + case opcode_NOT: + *ppName = (uchar*) "not"; + break; + case opcode_CMP_EQ: + *ppName = (uchar*) "=="; + break; + case opcode_CMP_NEQ: + *ppName = (uchar*) "!="; + break; + case opcode_CMP_LT: + *ppName = (uchar*) "<"; + break; + case opcode_CMP_GT: + *ppName = (uchar*) ">"; + break; + case opcode_CMP_LTEQ: + *ppName = (uchar*) "<="; + break; + case opcode_CMP_CONTAINS: + *ppName = (uchar*) "contains"; + break; + case opcode_CMP_STARTSWITH: + *ppName = (uchar*) "startswith"; + break; + case opcode_CMP_GTEQ: + *ppName = (uchar*) ">="; + break; + case opcode_PUSHSYSVAR: + *ppName = (uchar*) "PUSHSYSVAR"; + break; + case opcode_PUSHMSGVAR: + *ppName = (uchar*) "PUSHMSGVAR"; + break; + case opcode_PUSHCONSTANT: + *ppName = (uchar*) "PUSHCONSTANT"; + break; + case opcode_POP: + *ppName = (uchar*) "POP"; + break; + case opcode_UNARY_MINUS: + *ppName = (uchar*) "UNARY_MINUS"; + break; + case opcode_STRADD: + *ppName = (uchar*) "STRADD"; + break; + default: + *ppName = (uchar*) "INVALID opcode"; + break; + } + + RETiRet; +} + + +/* queryInterface function + * rgerhards, 2008-02-21 + */ +BEGINobjQueryInterface(vmop) +CODESTARTobjQueryInterface(vmop) + if(pIf->ifVersion != vmopCURR_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). + */ + //xxxpIf->oID = OBJvmop; + + pIf->Construct = vmopConstruct; + pIf->ConstructFinalize = vmopConstructFinalize; + pIf->Destruct = vmopDestruct; + pIf->DebugPrint = vmopDebugPrint; + pIf->SetOpcode = vmopSetOpcode; + pIf->SetVar = vmopSetVar; + pIf->Opcode2Str = vmopOpcode2Str; +finalize_it: +ENDobjQueryInterface(vmop) + + +/* Initialize the vmop class. Must be called as the very first method + * before anything else is called inside this class. + * rgerhards, 2008-02-19 + */ +BEGINObjClassInit(vmop, 1, OBJ_IS_CORE_MODULE) /* class, version */ + /* request objects we use */ + CHKiRet(objUse(var, CORE_COMPONENT)); + + OBJSetMethodHandler(objMethod_DEBUGPRINT, vmopDebugPrint); + OBJSetMethodHandler(objMethod_CONSTRUCTION_FINALIZER, vmopConstructFinalize); +ENDObjClassInit(vmop) + +/* vi:set ai: + */ |