com.joanju.cg.bytecode
Class PushonretInstr

java.lang.Object
  com.joanju.cg.bytecode.Bytecode
      com.joanju.cg.bytecode.PushInstr
          com.joanju.cg.bytecode.PushonretInstr

public class PushonretInstr
extends PushInstr

Used in a procedure for OUTPUT and INPUT-OUTPUT parameters, and for the return value from functions and methods. A regular push instruction just pushes one rval onto the stack. A pushonret instruction is an aggregate of multiple possible rvalues.

Field Summary

Fields inherited from class com.joanju.cg.bytecode.PushInstr

paramNum, values

Fields inherited from class com.joanju.cg.bytecode.Bytecode

address, cuid, instrSet, nodeNum, xrefs

Constructor Summary

PushonretInstr()

PushonretInstr(int cuid, int address)

Method Summary

void	calcValueSets() Calculate the value sets for the instruction.
Opcode	getOpcode()
java.util.HashSet<java.lang.Integer>	getSources() Returns null.
protected void	setValuesFromByteStream(java.io.DataInputStream in)
java.lang.String	toStringFromData() All Bytecode instruction subclasses should override this eventually.
protected void	writeValuesToByteStream(java.io.DataOutputStream out)

Methods inherited from class com.joanju.cg.bytecode.PushInstr

checkWhereUsed, getParamNum, getRVal, getValues, setParamNum, setRVal

Methods inherited from class com.joanju.cg.bytecode.Bytecode

addSource, addWhereUsed, beforeWrite, calcValuesAgain, compareTo, equals, fetchBytesFromDB, fetchInCu, generateDataForDB, getAddress, getCuID, getNodeNum, getValuesCalcLocal, getWhereUsed, getXrefs, hashCode, initData, isDataModified, isFromDB, setAddress, setCuID, setDataBytesFromDB, setDataModified, setFromDB, setInstructionSet, setNodeNum, shouldLoadData, sourcesForXrefTarget, storeIfModified, toString, toStringFromComments, toStringFromName, toStringFromSet

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

PushonretInstr

public PushonretInstr()

PushonretInstr

public PushonretInstr(int cuid,
                      int address)

Method Detail

calcValueSets

public void calcValueSets()
                   throws java.sql.SQLException,
                          java.io.IOException

Description copied from class: Bytecode

Calculate the value sets for the instruction.

Called during build, build-recalc, checkvals, and checkvals-recalc. Implementations should only build from external values once. Calculates which xref records are needed as well.

IMPORTANT: Should only ever be called for instructions belonging to an InstructionSet.

Overrides:

calcValueSets in class PushInstr

Throws:

java.sql.SQLException

java.io.IOException

getOpcode

public Opcode getOpcode()

Overrides:

getOpcode in class PushInstr

getSources

public java.util.HashSet<java.lang.Integer> getSources()
                                                throws java.sql.SQLException,
                                                       java.io.IOException

Description copied from class: Bytecode

Returns null. May be overridden by subclasses.

Overrides:

getSources in class Bytecode

Throws:

java.sql.SQLException

java.io.IOException

setValuesFromByteStream

protected void setValuesFromByteStream(java.io.DataInputStream in)
                                throws java.io.IOException

Overrides:

setValuesFromByteStream in class PushInstr

Throws:

java.io.IOException

toStringFromData

public java.lang.String toStringFromData()

Description copied from class: Bytecode

All Bytecode instruction subclasses should override this eventually.

Overrides:

toStringFromData in class PushInstr

Returns:

"" if not overridden.

writeValuesToByteStream

protected void writeValuesToByteStream(java.io.DataOutputStream out)
                                throws java.io.IOException

Overrides:

writeValuesToByteStream in class PushInstr

Throws:

java.io.IOException