ExposeInstruction.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                                                            */
/*                                                                            */
/* Primitive Expose Parse Class                                               */
/*                                                                            */
/******************************************************************************/
#include <stdlib.h>
#include "RexxCore.h"
#include "RexxActivation.hpp"
#include "QueueClass.hpp"
#include "ExposeInstruction.hpp"
#include "ExpressionBaseVariable.hpp"
 
RexxInstructionExpose::RexxInstructionExpose(
    size_t      varCount,              /* count of variables                */
    RexxQueue  *variable_list)         /* list of exposed variables         */
/******************************************************************************/
/* Function:  Complete initialization of an EXPOSE instruction object         */
/******************************************************************************/
 {
    /* get the variable size             */
    variableCount = varCount;
    while (varCount > 0)                 /* loop through the variable list    */
    {
                                         /* copying each variable             */
        OrefSet(this, this->variables[--varCount], (RexxVariableBase *)(variable_list->pop()));
    }
}
 
void RexxInstructionExpose::live(size_t liveMark)
/******************************************************************************/
/* Function:  Normal garbage collection live marking                          */
/******************************************************************************/
{
    size_t i;                            /* loop counter                      */
    size_t count;                        /* argument count                    */
 
    memory_mark(this->nextInstruction);  /* must be first one marked          */
    for (i = 0, count = variableCount; i < count; i++)
    {
        memory_mark(this->variables[i]);
    }
}
 
void RexxInstructionExpose::liveGeneral(int reason)
/******************************************************************************/
/* Function:  Generalized object marking                                      */
/******************************************************************************/
{
    size_t i;                            /* loop counter                      */
    size_t count;                        /* argument count                    */
 
                                         /* must be first one marked          */
    memory_mark_general(this->nextInstruction);
    for (i = 0, count = variableCount; i < count; i++)
    {
        memory_mark_general(this->variables[i]);
    }
}
 
void RexxInstructionExpose::flatten(RexxEnvelope *envelope)
/******************************************************************************/
/* Function:  Flatten an object                                               */
/******************************************************************************/
{
    size_t i;                            /* loop counter                      */
    size_t count;                        /* argument count                    */
 
    setUpFlatten(RexxInstructionExpose)
 
    flatten_reference(newThis->nextInstruction, envelope);
    for (i = 0, count = variableCount; i < count; i++)
    {
        flatten_reference(newThis->variables[i], envelope);
    }
 
    cleanUpFlatten
}
 
void RexxInstructionExpose::execute(
    RexxActivation      *context,      /* current activation context        */
    RexxExpressionStack *stack)        /* evaluation stack                  */
/******************************************************************************/
/* Function:  Execute a REXX EXPOSE instruction                               */
/******************************************************************************/
{
    context->traceInstruction(this);     /* trace if necessary                */
    if (!context->inMethod())            /* is this a method clause?          */
    {
                                         /* raise an error                    */
        reportException(Error_Translation_expose);
    }
 
    /* have the context expose these */
    context->expose(variables, variableCount);
    context->pauseInstruction();         /* do debug pause if necessary       */
}