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+/* 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:
+ */