ExpressionDotVariable.cpp

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/*----------------------------------------------------------------------------*/
/*                                                                            */
/* Copyright (c) 1995, 2004 IBM Corporation. All rights reserved.             */
/* Copyright (c) 2005-2009 Rexx Language Association. All rights reserved.    */
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/*----------------------------------------------------------------------------*/
/******************************************************************************/
/* REXX Translator                                                            */
/*                                                                            */
/* Primitive Translator Expression Parsing Dot Variable Reference Class       */
/*                                                                            */
/******************************************************************************/
#include <stdlib.h>
#include "RexxCore.h"
#include "StringClass.hpp"
#include "RexxActivation.hpp"
#include "ExpressionDotVariable.hpp"
#include "SourceFile.hpp"
 
RexxDotVariable::RexxDotVariable(
    RexxString * variable_name )       /* dExpressionBaseVariableiable name to access       */
/******************************************************************************/
/* Function:  Initialize a DOTVARIABLE retriever item                         */
/******************************************************************************/
{
                                       /* store the name                    */
  OrefSet(this, this->variableName, variable_name);
}
 
void RexxDotVariable::live(size_t liveMark)
/******************************************************************************/
/* Function:  Normal garbage collection live marking                          */
/******************************************************************************/
{
  memory_mark(this->variableName);
}
 
void RexxDotVariable::liveGeneral(int reason)
/******************************************************************************/
/* Function:  Generalized object marking                                      */
/******************************************************************************/
{
  memory_mark_general(this->variableName);
}
 
void RexxDotVariable::flatten(RexxEnvelope * envelope)
/******************************************************************************/
/* Function:  Flatten an object                                               */
/******************************************************************************/
{
  setUpFlatten(RexxDotVariable)
 
  flatten_reference(newThis->variableName, envelope);
 
  cleanUpFlatten
}
 
RexxObject * RexxDotVariable::evaluate(
    RexxActivation      *context,      /* current activation context        */
    RexxExpressionStack *stack )       /* evaluation stack                  */
/****************************************************************************/
/* Function:  Evaluate a REXX dot variable                                  */
/****************************************************************************/
{
    /* try for a REXX defined name       */
    RexxObject *result = context->rexxVariable(this->variableName);
    if (result == OREF_NULL)             /* not there?                        */
    {
        /* get this from the source          */
        result = context->resolveDotVariable(this->variableName);
    }
    if (result == OREF_NULL)             /* not there?                        */
    {
        /* add a period to the name          */
        result = this->variableName->concatToCstring(CHAR_PERIOD);
    }
    stack->push(result);                 /* place on the evaluation stack     */
                                         /* trace if necessary                */
    context->traceDotVariable(variableName, result);
    return result;                       /* also return the result            */
}
 
 
RexxObject * RexxDotVariable::getValue(
    RexxActivation      *context)
/****************************************************************************/
/* Function:  Evaluate a REXX dot variable                                  */
/****************************************************************************/
{
    /* get this from the source          */
    RexxObject *result = context->resolveDotVariable(this->variableName);
    if (result == OREF_NULL)             /* not there?                        */
    {
        /* try for a REXX defined name       */
        result = context->rexxVariable(this->variableName);
    }
    if (result == OREF_NULL)             /* not there?                        */
    {
        /* add a period to the name          */
        result = this->variableName->concatToCstring(CHAR_PERIOD);
    }
    return result;                       /* also return the result            */
}
 
void * RexxDotVariable::operator new(size_t size)
/******************************************************************************/
/* Function:  Create a new translator object                                  */
/******************************************************************************/
{
                                       /* Get new object                    */
    return new_object(size, T_DotVariableTerm);
}