ContextClass.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 Kernel                                                                */
/*                                                                            */
/* Primitive Rexx execution context                                           */
/*                                                                            */
/******************************************************************************/
#include "RexxCore.h"
#include "ContextClass.hpp"
#include "RexxActivation.hpp"
#include "SupplierClass.hpp"
#include "DirectoryClass.hpp"
 
RexxClass *RexxContext::classInstance = OREF_NULL;   // singleton class instance
 
void RexxContext::createInstance()
{
    CLASS_CREATE(RexxContext, "RexxContext", RexxClass);
}
 
 
void *RexxContext::operator new(size_t size)
{
    /* Get new object                    */
    return new_object(size, T_RexxContext);
}
 
 
RexxContext::RexxContext(RexxActivation *a)
{
    activation = a;
}
 
 
RexxObject *RexxContext::newRexx(RexxObject **args, size_t argc)
{
    // we do not allow these to be allocated from Rexx code...
    reportException(Error_Unsupported_new_method, ((RexxClass *)this)->getId());
    return TheNilObject;
}
 
 
void RexxContext::live(size_t liveMark)
/******************************************************************************/
/* Function:  Normal garbage collection live marking                          */
/******************************************************************************/
{
    memory_mark(this->activation);
}
 
void RexxContext::liveGeneral(int reason)
/******************************************************************************/
/* Function:  Generalized object marking                                      */
/******************************************************************************/
{
    memory_mark_general(this->activation);
}
 
void RexxContext::flatten(RexxEnvelope *envelope)
/******************************************************************************/
/* Function:  Flatten an object                                               */
/******************************************************************************/
{
  setUpFlatten(RexxContext)
 
  newThis->activation = OREF_NULL;   // this never should be getting flattened, so sever the connection
 
  cleanUpFlatten
}
 
 
RexxObject *RexxContext::copyRexx()
{
    // we do not allow these to be allocated from Rexx code...
    reportException(Error_Unsupported_copy_method, this);
    return TheNilObject;
}
 
 
void RexxContext::checkValid()
{
    if (activation == OREF_NULL)
    {
        reportException(Error_Execution_context_not_active);
    }
}
 
 
PackageClass *RexxContext::getPackage()
{
    checkValid();
    return activation->getPackage();
}
 
 
RexxObject *RexxContext::getDigits()
{
    checkValid();
    return new_integer(activation->digits());
}
 
 
RexxObject *RexxContext::getFuzz()
{
    checkValid();
    return new_integer(activation->fuzz());
}
 
 
RexxObject *RexxContext::getForm()
{
    checkValid();
    return activation->form() == Numerics::FORM_SCIENTIFIC ? OREF_SCIENTIFIC : OREF_ENGINEERING;
}
 
 
RexxObject *RexxContext::getVariables()
{
    checkValid();
    return activation->getAllLocalVariables();
}
 
 
RexxObject *RexxContext::getExecutable()
{
    checkValid();
    return activation->getExecutable();
}
 
 
RexxObject *RexxContext::getArgs()
{
    checkValid();
    RexxObject **arglist = activation->getMethodArgumentList();
    size_t size = activation->getMethodArgumentCount();
    return new (size, arglist) RexxArray;
}
 
 
RexxObject *RexxContext::getCondition()
{
    checkValid();
                                       /* get current trapped condition     */
    RexxObject *conditionobj = activation->getConditionObj();
    return conditionobj == OREF_NULL ? TheNilObject : conditionobj->copy();
}
 
 
RexxObject *RexxContext::getLine()
{
    checkValid();
    return activation->getContextLine();
}
 
 
RexxObject *RexxContext::getRS()
{
    checkValid();
    return activation->getContextReturnStatus();
}
 
 
RexxObject *RexxContext::getName()
{
    checkValid();
    return activation->getCallname();
}
 
RexxObject *RexxContext::getStackFrames()
{
    checkValid();
    // we don't want to include the stackframes frame in the list, so ask
    // that it be skipped.
    return activation->getStackFrames(true);
}