RexxCode.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                                                 RexxCode.cpp   */
/*                                                                            */
/* Primitive Method Class                                                     */
/*                                                                            */
/******************************************************************************/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "RexxCore.h"
#include "RexxCode.hpp"
#include "ArrayClass.hpp"
#include "DirectoryClass.hpp"
#include "RexxInstruction.hpp"
#include "SourceFile.hpp"
#include "ActivityManager.hpp"
#include "RexxActivation.hpp"
#include <ctype.h>
 
 
 
RexxCode::RexxCode(
     RexxSource      * _source,        /* source object                     */
     RexxInstruction * _start,         /* start of the code tree            */
     RexxDirectory   * _labels,        /* method labels                     */
     size_t            maxstack,       /* max operator stack size           */
     size_t            variable_index) /* save of the vdict                 */
/******************************************************************************/
/* Function:  Initialize a rexxmethod code object                             */
/******************************************************************************/
{
  OrefSet(this, this->source, _source); /* save the program source         */
  OrefSet(this, this->start, _start);   /* the parse tree                    */
  OrefSet(this, this->labels, _labels); /* the method's labels               */
  /* save the stack info               */
  this->maxStack = maxstack;
  this->vdictSize = variable_index;    /* save the initial vdict size       */
}
 
 
void RexxCode::call(RexxActivity *activity, RoutineClass *routine, RexxString *msgname, RexxObject**argPtr, size_t argcount, ProtectedObject &result)
{
    // just forward to the more general method
    this->call(activity, routine, msgname, argPtr, argcount, OREF_SUBROUTINE, OREF_NULL, EXTERNALCALL, result);
}
 
 
void RexxCode::call(
    RexxActivity *activity,            /* activity running under            */
    RoutineClass *routine,             // top level routine instance
    RexxString *msgname,               /* message to be run                 */
    RexxObject**argPtr,                /* arguments to the method           */
    size_t      argcount,              /* the count of arguments            */
    RexxString *calltype,              /* COMMAND/ROUTINE/FUNCTION          */
    RexxString *environment,           /* initial command environment       */
    int   context,                     /* type of context                   */
    ProtectedObject &result)           // the method result
/******************************************************************************/
/* Function:  Call a method as a top level program or external function call  */
/******************************************************************************/
{
    // check the stack space before proceeding
    activity->checkStackSpace();       /* have enough stack space?          */
                                       /* add to the activity stack         */
    RexxActivation *newacta = ActivityManager::newActivation(activity, routine, this, calltype, environment, context);
    activity->pushStackFrame(newacta);
                /* run the method and return result  */
    newacta->run(OREF_NULL, msgname, argPtr, argcount, OREF_NULL, result);
}
 
 
void RexxCode::run(
    RexxActivity *activity,            /* activity running under            */
    RexxMethod *method,                // the method object getting invoked
    RexxObject *receiver,              /* object receiving the message      */
    RexxString *msgname,               /* message to be run                 */
    RexxObject**argPtr,                /* arguments to the method           */
    size_t      argcount,              /* the count of arguments            */
    ProtectedObject &result)           // the method result
/******************************************************************************/
/* Function:  Call a method as a top level program or external function call  */
/******************************************************************************/
{
    RexxActivation *newacta = ActivityManager::newActivation(activity, method, this);
                                       /* add to the activity stack         */
    activity->pushStackFrame(newacta);
                                       /* run the method and return result  */
    newacta->run(receiver, msgname, argPtr, argcount, OREF_NULL, result);
    activity->relinquish();            /* yield control now */
}
 
 
void RexxCode::live(size_t liveMark)
/******************************************************************************/
/* Function:  Normal garbage collection live marking                          */
/******************************************************************************/
{
  memory_mark(this->source);
  memory_mark(this->start);
  memory_mark(this->labels);
}
 
void RexxCode::liveGeneral(int reason)
/******************************************************************************/
/* Function:  Generalized object marking                                      */
/******************************************************************************/
{
  memory_mark_general(this->source);
  memory_mark_general(this->start);
  memory_mark_general(this->labels);
}
 
void RexxCode::flatten(RexxEnvelope * envelope)
/******************************************************************************/
/* Function:  Flatten an object                                               */
/******************************************************************************/
{
  setUpFlatten(RexxCode)
 
   flatten_reference(newThis->source, envelope);
   flatten_reference(newThis->start, envelope);
   flatten_reference(newThis->labels, envelope);
 
  cleanUpFlatten
}
 
RexxArray *RexxCode::getSource()
/******************************************************************************/
/* Function:  Extract the source from a method from the source object as an   */
/*            array of strings.                                               */
/******************************************************************************/
{
  SourceLocation   location;           /* location information              */
  SourceLocation   end_location;       /* ending location                   */
  RexxInstruction *current;            /* current instruction               */
 
  if (this->start == OREF_NULL)        /* empty method?                     */
    return new_array((size_t)0);       /* just return an empty array        */
  location = start->getLocation();     /* get its location info             */
  current = this->start;               /* point to the beginning            */
                                       /* while not at the last one         */
  while (current->nextInstruction != OREF_NULL) {
    current = current->nextInstruction;/* step to the next one              */
  }
 
  end_location = current->getLocation(); /* get the end location              */
                                       /* copy over the ending position     */
  location.setEndLine(end_location.getEndLine());
  location.setEndOffset(end_location.getEndOffset());
                                       /* go extract the source array       */
  return this->source->extractSource(location);
}
 
RexxString * RexxCode::getProgramName()
/******************************************************************************/
/* Function:  Return the name of the program that contains this method.       */
{
                                       /* retrieve this from the source     */
  return this->source->getProgramName();
}
 
 
void * RexxCode::operator new(size_t size)
/******************************************************************************/
/* Function:  Create a new rexx method code instance                          */
/******************************************************************************/
{
    return new_object(size, T_RexxCode);        /* Get new object                    */
}
 
 
RexxObject *RexxCode::setSecurityManager(RexxObject *manager)
/******************************************************************************/
/* Function:  Associate a security manager with a method's source             */
/******************************************************************************/
{
    source->setSecurityManager(manager);
    return TheTrueObject;
}