AddressInstruction.cpp

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/*----------------------------------------------------------------------------*/
/*                                                                            */
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/* Copyright (c) 2005-2009 Rexx Language Association. All rights reserved.    */
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/*----------------------------------------------------------------------------*/
/******************************************************************************/
/* REXX Translator                                   AddressInstruction.cpp   */
/*                                                                            */
/* Primitive Address Parse Class                                              */
/*                                                                            */
/******************************************************************************/
#include <stdlib.h>
#include "RexxCore.h"
#include "StringClass.hpp"
#include "RexxActivation.hpp"
#include "AddressInstruction.hpp"
#include "SystemInterpreter.hpp"
 
RexxInstructionAddress::RexxInstructionAddress(
  RexxObject *_expression,              /* variable address expression       */
  RexxString *_environment,             /* address environment name          */
  RexxObject *_command)                 /* command to issue                  */
/******************************************************************************/
/* Function : Complete address instruction initialization                     */
/******************************************************************************/
{
                                       /* store the instruction state       */
  OrefSet(this, this->expression, _expression);
  OrefSet(this, this->environment, _environment);
  OrefSet(this, this->command, _command);
}
 
void RexxInstructionAddress::live(size_t liveMark)
/******************************************************************************/
/* Function:  Normal garbage collection live marking                          */
/******************************************************************************/
{
  memory_mark(this->nextInstruction);  /* must be first one marked          */
  memory_mark(this->expression);
  memory_mark(this->environment);
  memory_mark(this->command);
}
 
void RexxInstructionAddress::liveGeneral(int reason)
/******************************************************************************/
/* Function:  Generalized object marking                                      */
/******************************************************************************/
{
                                       /* must be first one marked          */
  memory_mark_general(this->nextInstruction);
  memory_mark_general(this->expression);
  memory_mark_general(this->environment);
  memory_mark_general(this->command);
}
 
void RexxInstructionAddress::flatten(RexxEnvelope *envelope)
/******************************************************************************/
/* Function:  Flatten an object                                               */
/******************************************************************************/
{
  setUpFlatten(RexxInstructionAddress)
 
  flatten_reference(newThis->nextInstruction, envelope);
  flatten_reference(newThis->expression, envelope);
  flatten_reference(newThis->environment, envelope);
  flatten_reference(newThis->command, envelope);
 
  cleanUpFlatten
}
 
void RexxInstructionAddress::execute(
    RexxActivation      *context,      /* current activation context        */
    RexxExpressionStack *stack )       /* evaluation stack                  */
/****************************************************************************/
/* Function:  Execute a REXX LEAVE instruction                              */
/****************************************************************************/
{
    context->traceInstruction(this);     /* trace if necessary                */
                                         /* is this an address toggle?        */
    if (this->environment == OREF_NULL && this->expression == OREF_NULL)
    {
        context->toggleAddress();          /* toggle the address settings       */
        context->pauseInstruction();       /* do debug pause if necessary       */
    }
    /* have a constant address name?     */
    else if (this->environment != OREF_NULL)
    {
        if (this->command != OREF_NULL)
        {  /* actually the command form?        */
           /* get the expression value          */
            RexxObject *result = this->command->evaluate(context, stack);
            RexxString *_command = REQUEST_STRING(result);/* force to string form              */
            context->traceResult(_command);  /* trace if necessary                */
                                             /* validate the address name         */
            SystemInterpreter::validateAddressName(this->environment);
            /* go process the command            */
            context->command(this->environment, _command);
        }
        else
        {                             /* just change the address           */
                                      /* validate the address name         */
            SystemInterpreter::validateAddressName(this->environment);
            /* now perform the switch            */
            context->setAddress(this->environment);
            context->pauseInstruction();     /* do debug pause if necessary       */
        }
    }
    else
    {                               /* we have an ADDRESS VALUE form     */
                                    /* get the expression value          */
        RexxObject *result = this->expression->evaluate(context, stack);
        RexxString *_address = REQUEST_STRING(result); /* force to string form              */
        context->traceResult(_address);    /* trace if necessary                */
        SystemInterpreter::validateAddressName(_address);  /* validate the address name         */
        context->setAddress(_address);     /* just change the address           */
        context->pauseInstruction();       /* do debug pause if necessary       */
    }
}